US20100298984A1 - Usb hvac service verification - Google Patents
Usb hvac service verification Download PDFInfo
- Publication number
- US20100298984A1 US20100298984A1 US12/694,407 US69440710A US2010298984A1 US 20100298984 A1 US20100298984 A1 US 20100298984A1 US 69440710 A US69440710 A US 69440710A US 2010298984 A1 US2010298984 A1 US 2010298984A1
- Authority
- US
- United States
- Prior art keywords
- hvac system
- control unit
- memory device
- flash memory
- microcontroller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D4/00—Tariff metering apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/127—Arrangements for measuring electric power or power factor by using pulse modulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
- G01R21/1333—Arrangements for measuring electric power or power factor by using digital technique adapted for special tariff measuring
- G01R21/1335—Tariff switching circuits
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
- G05D23/1393—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures characterised by the use of electric means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/64—Means for preventing incorrect coupling
- H01R13/645—Means for preventing incorrect coupling by exchangeable elements on case or base
- H01R13/6456—Means for preventing incorrect coupling by exchangeable elements on case or base comprising keying elements at different positions along the periphery of the connector
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/04—Single phase motors, e.g. capacitor motors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2614—HVAC, heating, ventillation, climate control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/10—The network having a local or delimited stationary reach
- H02J2310/12—The local stationary network supplying a household or a building
- H02J2310/14—The load or loads being home appliances
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/62—The condition being non-electrical, e.g. temperature
- H02J2310/64—The condition being economic, e.g. tariff based load management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/221—General power management systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
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- Y04S20/242—Home appliances
- Y04S20/244—Home appliances the home appliances being or involving heating ventilating and air conditioning [HVAC] units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T29/49147—Assembling terminal to base
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- HVAC heating, ventilation and air conditioning
- HVAC systems are typically serviced on a regular or intermittent basis for installation, repair and maintenance.
- An owner of an HVAC system being serviced typically contracts with a local HVAC service provider to perform such service.
- the service provider or an agent thereof performs the contracted service by visiting the site of the HVAC system.
- the system may be located in a location that is difficult to reach, such as a building rooftop. Such locations are not easily amenable to transporting equipment to the HVAC system site, especially heavy and/or bulky equipment. Exposure to the elements discourages use of some equipment, such as computers that have not been hardened to operate in adverse environmental conditions. Furthermore, in many cases a service technician may not be trusted with possession of valuable electronic devices such as a portable computer.
- HVAC system including an enclosure for containing components of the HVAC system.
- an HVAC system control unit including a microcontroller for controlling an operation of the HVAC system.
- the HVAC system control unit further includes a memory associated with the microcontroller and configured to store data associated with operation of the HVAC system.
- the microcontroller is configurable to directly transfer the data between the memory and a portable flash memory device.
- the HVAC system control unit further includes a portable flash memory device interface for coupling the portable flash memory device directly thereto.
- the method includes configuring an enclosure to contain components of an HVAC system.
- An HVAC system control unit is located within the enclosure and includes a microcontroller for controlling an operation of the HVAC system.
- a parameter memory associated with the microcontroller is included within the HVAC system control unit.
- the method further includes configuring the parameter memory to store data associated with operation of the HVAC system.
- the microcontroller is configurable to directly transfer the data between the memory and a portable flash memory device.
- the HVAC system control unit is provided with a portable flash memory device interface for coupling the portable flash memory device directly to the microcontroller.
- an HVAC system control unit including a microcontroller.
- the microcontroller is configured to controlling an operation of an HVAC system.
- a memory associated with the microcontroller is configured to store data associated with operation of the HVAC system, and further configurable to directly transfer the data between the memory and a portable flash memory device.
- the HVAC system control unit includes a portable flash memory device interface for coupling the portable flash memory device directly to the microcontroller.
- FIG. 1 illustrates a cluster of HVAC systems on a rooftop
- FIG. 2 illustrates an HVAC system of the disclosure including an HVAC system control unit
- FIG. 3 illustrates an HVAC system control unit including a portable flash memory device port
- FIG. 4 illustrates a schematic of an embodiment of the HVAC system control unit
- FIG. 5 presents a method of servicing an HVAC system
- FIG. 6 illustrates an HVAC system profile
- FIG. 7 presents a method of verifying service to an HVAC system
- FIGS. 8A and 8B present a method manufacturing an HVAC system.
- HVAC system operators such as a corporation, partnership, an individual, or any other entity that contracts with a HVAC service provider for maintenance of an HVAC system, are increasingly concerned about the quality of service performed on HVAC systems by HVAC service providers (corporate or individual service technicians), e.g., the impact on energy efficiency, and the desire to control service expenses.
- Completeness of service, future service needs, and anticipated capital improvements are determined from data collected from currently operated HVAC systems.
- operators seek to ensure that services performed are handled efficiently, quickly, and cost-effectively.
- the data available to the operators is incomplete.
- Some information regarding a HVAC unit is provided by a service technician who visits the unit to perform installation, repairs or maintenance. However, such information is typically limited in scope, and the operator has no way to verify if the reported data are correct.
- an HVAC system is networked, with some data related to the operation of the HVAC system being available to the operator. However, in conventional HVAC operation such data do not guarantee that the service technician has physically visited the HVAC unit. Thus, the operator has no way to verify that repairs that do not modify data obtained via the network have been performed as contracted.
- call-in service centers may provide assistance to a service technician or HVAC system operator.
- a remote service provider located at the call-in center is often placed in the position of attempting to solve complex issues without detailed data regarding the subject HVAC system. There thus exists a need to provide the remote service provider with precise and timely data from the HVAC unit to improve efficiency and effectiveness of call-in center support.
- Some HVAC systems are configured to accept a connection from a portable computer, e.g. a laptop computer. Such a connection may be used, e.g., during the manufacturing process to configure the HVAC system.
- a connection may be used, e.g., during the manufacturing process to configure the HVAC system.
- the utility of such a connection after the HVAC system is installed is extremely limited, as service technicians frequently do not have a portable computer, and the site of installation, e.g., outdoors, often on a building roof, is generally poorly suited for portable computers.
- the weight of the portable computer may create difficulty or hazard to the service technician when accessing a rooftop HVAC system, e.g., climbing a ladder.
- PFMDs Portable flash memory devices
- HVAC service technician in various embodiments described herein.
- the following description is provided in the context of rooftop commercial HVAC units, but the disclosure is not limited thereto.
- an HVAC system 120 may be commercial or residential, located on a rooftop or at ground level.
- a cluster 110 of HVAC systems 120 a - 120 f is located on a rooftop of a building 130 .
- the HVAC systems 120 may be configured to cool the interior space of the building 130 .
- the cluster 110 may be managed via a centralized management system operated by an owner or lessee of the building 130 .
- the building 130 may be one of many retail stores operated by a national chain.
- the store owner may manage the cluster 110 from a central location to monitor energy consumption and provide general maintenance.
- FIG. 2 illustrates internal aspects of the HVAC system 120 , sometimes referred herein to simply as the system 120 .
- the system 120 includes an enclosure 205 for containing various components of the system 120 .
- the system 120 includes a compressor 210 , a condenser coil 220 and an evaporator coil 230 .
- the operation of the system 120 is described without limitation in the context of cooling air in an interior space of the building 130 .
- the compressor 210 compresses a refrigerant that flows to the condenser coil 220 over which a fan 240 moves air to transfer heat to the ambient environment.
- the refrigerant flows through an expansion valve 250 , cools and flows through the evaporator coil 230 .
- Air from an interior space being conditioned by the system 120 is cooled as it is moved past the evaporator coil 230 by a blower 260 .
- the operation of the various components of the system 120 is controlled at least in part by an HVAC system control unit 270 , or simply control unit 270 .
- the system 120 is an integrated HVAC system, including both the condenser coil 220 and the evaporator coil 230 within the enclosure 205 .
- Other HVAC systems are also within the scope of the disclosure, including indoor units, outdoor units, attic units, and heat pumps.
- FIG. 3 illustrates an embodiment of the control unit 270 , presented without limitation.
- the control unit 270 may include a display 310 and an input keypad 320 .
- the display 310 may present various menus, parameters, and other configuration information to a user.
- the keypad 320 may accept user input to make selections presented to the user by the display 310 , navigate among menus, and input configuration parameters. Selections may be finalized by an enter button 325 .
- the control unit 270 may advantageously include a menu map 330 for reference by the user when interacting with the control unit 270 .
- the control unit 270 also includes a portable flash memory device (PFMD) port 340 .
- the port 340 may be a hard-wire port or may include a wireless port that can communicate wirelessly with a PFMD device.
- the PFMD port 340 is configured to couple a PFMD to the control unit 270 .
- the PFMD port 340 is illustrated without limitation as a universal serial bus (USB) port. However, embodiments contemplated by the disclosure more generally include any conventional or future-developed portable device including flash memory (FM) or equivalent.
- FM includes without limitation, e.g., USB flash memory, also known as thumb drives, jump drives, pen drives, and other colloquial terms; Memory StickTM; SmartMediaTM, Compact FlashTM (CF) in its various revisions and form factors; Secure DigitalTM (SD); and any other functional equivalent of the aforementioned flash memory types, including future-developed portable rewritable solid state memory technology.
- USB flash memory also known as thumb drives, jump drives, pen drives, and other colloquial terms
- Memory StickTM SmartMediaTM, Compact FlashTM (CF) in its various revisions and form factors
- SD Secure Digital
- the disclosure may present various embodiments with reference to the USB FM. Such embodiments are presented without limitation to the type of FM employed.
- the control unit 270 includes, as previously described, the keypad 320 , the display 310 and the PFMD port 340 .
- a microcontroller 410 accepts inputs from the keypad 320 and provides output data to the display 310 .
- the microcontroller 410 may be any conventional or future developed microcontroller, microprocessor or state machine, e.g.
- the microcontroller 410 operates in response to program instructions read from a conventional program memory 420 to control aspects of the operation of the HVAC system 120 .
- the program instructions are sometimes referred to as “firmware.”
- the program memory 420 may include both nonvolatile memory for persistent storage of program instructions and volatile memory for temporary storage of data.
- the memory may also include rewritable memory, e.g., flash memory, to allow for updating of the program instructions.
- a conventional parameter memory 430 of parameters associated with operation of the system 120 may include, e.g., hardware configuration settings, component serial numbers, installed options, hardware revisions, control algorithm coefficients, operational data, diagnostics, service history, temperature set points and setback times.
- the parameter memory 430 may be volatile or nonvolatile, though in various embodiments nonvolatile memory, e.g. flash memory, may be preferred to retain stored parameters if power to the system 120 is interrupted.
- the microcontroller 410 interacts with other components of the system 120 via a system interface 440 .
- the system interface 440 may include necessary electronic components to address various components of the system 120 , and to provide control signals at appropriate voltage levels.
- a network interface 450 may provide an interface to a network, e.g., a local area network (LAN) or the internet. The network interface 450 may allow monitoring of various operational aspects of the system 120 , such as operational status, and power consumption.
- a computer interface 460 provides a means to couple a computer to the control unit 270 . The computer interface 460 is conventionally used to configure the system 120 during the manufacturing process, e.g.
- a PFM interface 470 couples the microcontroller 410 to a PFMD 480 .
- the PFM interface 470 provides any necessary signal buffering and/or address encoding/decoding and/or control signals necessary to read from or write to memory locations within the PFMD 480 .
- the PFM interface 470 is wholly contained within the functionality of the microcontroller 410 .
- the PFM interface 470 is implemented by one or more components separate and distinct from the microcontroller 410 .
- the program memory 420 includes instructions that configure the microcontroller 410 to transfer data between the PFMD 480 and the parameter memory 430 . In various embodiments such transfer is in response to commands entered by a user via the keypad 320 .
- the microcontroller 410 is configurable to recognize the presence of the PFMD 480 when the PFMD 480 is inserted into the PFMD port 340 , and to automatically transfer data between the parameter memory 430 and the PFMD 480 without the need for a user command.
- the PFMD port 340 provides a means for the service technician to directly transfer data between the PFMD 480 and the parameter memory 430 .
- the phrase “directly transfer” and variations thereof mean that data are transferred between the PFMD 480 and the parameter memory 430 without the involvement of an intervening computer, such as a portable computer or network server.
- the microcontroller 410 is not an intervening computing device in this context.
- the microcontroller 410 stores system configuration data in the parameter memory 430 in a system profile, e.g., a binary or ASCII file.
- the system profile may include various parameters associated with operation of the system 120 .
- the system profile includes several hundred individual settings.
- the parameters may define an operational configuration of the system 120 that defines the behavior of the system 120 .
- two systems 120 that are similarly configured with respect to HVAC components compressor, fans, blowers, etc.
- systems 120 in the cluster 110 may be configured to operate in a same manner by installation of a common configuration file on each system 120 in the cluster 110 .
- FIG. 5 illustrates a method generally designated 500 of servicing an HVAC system that advantageously benefits from the transferability of the configuration file via the PFMD 480 .
- a service provider e.g., HVAC technician
- the HVAC technician may be servicing one HVAC system 120 in the cluster 110 , e.g. As part of the servicing, the technician may change one or more parameters that in turn changes an aspect of the performance of the system 120 being serviced. It may be desired to similarly modify all the systems 120 in the cluster 110 so all the systems 120 operate with essentially the same characteristics.
- the technician is very unlikely to have a portable computer available to assist configuring the other systems 120 in the cluster.
- the technician typically repeats the configuration process for each other system 120 in the cluster.
- the technician may need to enter multiple parameter changes via a keypad, involving hundreds of key presses.
- the time required to enter changes to all the systems is time consuming and may result in considerable expense.
- a step 520 the technician transfers the configuration file from the PFMD 480 , previously obtained from the first system 120 , to a second HVAC system 120 .
- the microcontroller 410 is configured to transfer the configuration file directly, e.g., without the assistance of another computer system, from the PFMD 480 to the parameter memory 430 of the second HVAC system 120 . If the configuration file is encrypted, as discussed below, the microcontroller 410 may also decrypt the contents thereof before storing the parameters in the parameter memory 430 .
- the control unit 270 may be configured to effect the transfer with a small number of key strokes, resulting in rapid reconfiguration of the second system 120 . Of course, the second system 120 need not be in close proximity to the first system 120 .
- the technician may store the PFMD 480 in his or her pocket and reconfigure any number of other systems 120 over any time period at any location.
- the technician may even have several PFMDs 480 , one each for different models or configurations of the HVAC system 120 .
- the microcontroller 410 stores the configuration file with a time stamp or other identifying string that allows the technician to retrieve one of two or more configuration files from the PFMD 480 that corresponds to a desired configuration of the system 120 .
- multiple system configurations may be stored on and retrieved from a single PFMD 480 .
- a step 530 the first and the second HVAC systems 120 are operated in conformity with the configuration file stored in the parameter memory 430 .
- control unit 270 is configured to generate a service verification report.
- the service verification report is a data structure that may be written to the PFMD 480 .
- the data structure includes various data relevant to determining that the service technician performed services to the system 120 . Examples of such data include, without limitation, a date, a time, a serial number of an HVAC unit, a technician ID, configuration parameters as configured prior to the service, and configuration parameters as configured after the service.
- the system control unit 270 is configured in various embodiments to copy the service verification report from a memory, e.g., the parameter memory 430 , to the PFMD 480 . The transfer may be initiated by key strokes by the technician via the keypad 320 , e.g.
- the service verification report is generated “on the fly” when a request to transfer the report to the PFMD 480 is made.
- the microcontroller may draw from data available in other locations or contexts in the system 120 , e.g., the configuration file, time and data from a system clock, etc., while generating the service report.
- the service verification report may be provided to the HVAC operator to verify the presence of the technician at the system 120 being serviced, as described further below.
- the report 600 may have as many data fields as are desired.
- the report 600 includes a number of fields for illustration.
- a field 605 may include an identifying string, such as a file name.
- a field 610 may include a time stamp, date stamp or similar manner of indicating a time the report 600 is generated.
- a field 615 may indicate a control mode in which the system 120 is configured to operate, such as, e.g., heating or cooling.
- a field 620 may include operating set points, such as a target cooling temperature or a target heating temperature.
- a field 625 may include backup set points, e.g., set points that are used if a primary control fails.
- a field 630 may include a parameter indicating whether the system is configured to use fresh or tempered air.
- a field 635 may include a parameter indicating whether discharge air is heated or cooled.
- a field 640 may include a parameter indicating whether the system 120 is configured for multistage air flow.
- a field 645 may include a unit serial number.
- Fields 641 , 642 and 643 may respectively include equipment operational information such as runtime hours for major parts, error codes for equipment failures, and reports from self or installation tests.
- a field 650 may include an end-of-file marker.
- a feature of various embodiments presented herein is the ability to ensure integrity of data on the PFMD 480 .
- a service provider might be tempted to tamper with data on the PFMD 480 , such as a configuration file or a service verification report, to create the false appearance that service was performed. It is an objective of various embodiments herein to provide a high confidence level on the part of an HVAC operator that data provided via the PFMD 480 to support a service claim is authentic.
- the report 600 includes authentication data 655 .
- the authentication data 655 may be used to verify the integrity of the report 600 when the HVAC operator determines if a service claim properly reflects services rendered.
- the authentication data 655 may include, e.g., values derived from other data fields in the report 600 .
- the authentication data 655 may include a CRC computed for a proper subset of the data fields.
- the authentication data 655 may be placed in multiple locations in the report 600 , and may be encrypted. In some cases, multiple inclusions of identical information may be placed in multiple locations in the report 600 , with different encryption schemes used for duplicate inclusions.
- the entire service verification report is encrypted by the microcontroller 410 when written to the PFMD 480 .
- a service verification report such as the report 600
- the system profile may also be used in this manner, as well as any electronic verification file that includes data that may obtained easily by the operator only by being present at the system 120 .
- the service provider may transport the PFMD 380 to a location from which he or she may provide the electronic verification file to the HVAC operator in a form the HVAC operator may use to verify the presence of the service provider at the system 120 .
- the service provider may provide the PFMD 380 to the HVAC operator, may upload the electronic verification file to a database or server accessible to the HVAC operator, or may attach the electronic verification file to an electronic message (e.g., email).
- An electronic message may, for example, include a service invoice and the service verification file.
- the HVAC operator may then authenticate the service verification file, verify requested services were actually performed, and remit payment to the service provider.
- a method generally designated 700 of verifying the performance of service using an electronic verification file is presented in FIG. 7 .
- the method is described without limitation with reference to the service verification report 600 , and the system 120 and components thereof.
- a service provider causes the system 120 to transfer the electronic verification file to the PFMD 480 .
- the service provider may cause the transfer by selecting appropriate commands on the system control unit 270 .
- the service provider, or an agent thereof provides the electronic verification file to the HVAC operator.
- the HVAC operator may process the electronic verification file by, e.g., decrypting the file, computing and verifying a CRC value, comparing serial numbers or model numbers with an equipment database, comparing a service provider serial number with a service provider database, etc.
- the HVAC operator may also receive an invoice associated with the services rendered by the service provider, either with the electronic verification file or by a separate route.
- the HVAC operator remits payment or credits an account of the service provider in response to verifying the authenticity of the received electronic verification file, and in some cases verifying that parameters contained by the system verification file indicate services were actually performed.
- the control unit 270 is also configured in various embodiments to provide additional useful functionality via the PFMD port 340 .
- the control unit 270 is configured to update the program instructions located on the program memory 420 with updated program instructions located on the PFMD 480 .
- the update may be in response to commands entered via the keypad 320 , or automatically when the microcontroller 410 recognizes updated firmware on the PFMD 480 .
- control unit 270 is configured to store controller status logs and error logs on the PFMD 480 . These data may be used, e.g., for later analysis by the HVAC operator, manufacturer or dealer. Such data may be uploaded to a service database, or otherwise transmitted to an interested party.
- system 120 operational data are transferred to the PFMD 480 and transferred to a remote service provider, such as a central manufacturer service center, or “help desk.”
- a remote agent either human or machine, may use the operational data to diagnose system errors, malfunctions, etc. Possession of these data by the remote agent is expected to simplify diagnosis by the remote agent and reduce the time and expense needed to obtain advice, a diagnosis of an error, or other information from the remote agent.
- the data are transferred to an analyst to determine operational trends of the system 120 . For example, operational parameters may reveal trends relevant to preventative maintenance or reduction of energy consumption.
- the control unit 270 may also be configured to support various utility functions via the PFMD port 340 .
- the PFMD port may provide power to a light or a fan, or may charge a portable electronic device such as a cell phone.
- the control unit 270 may also be configured to provide some diagnostic capability via the PFMD port 340 .
- the control unit 270 may provide system data such as serial numbers, configuration data, firmware revisions, coolant pressure and error codes to a computer coupled to the PFMD port 380 .
- the control unit 270 is configured to distribute power to it through the PFMD port 340 to energize sensors or other electronics necessary to effect the transfer of the aforementioned data.
- Such embodiments may have particular utility in a manufacturing or shipping context, to provide a means to determine the identity or basic health of the system 120 without the need to remove packing materials, open panels, etc.
- a method generally designated 800 of manufacturing an HVAC system is presented. The method is described without limitation with reference to the system 120 and components thereof.
- a housing such as the enclosure 205 is configured to contain components of the HVAC system 120 .
- an HVAC system control unit such as the control unit 270 , is located within the housing.
- the interface includes a microcontroller for controlling an operation of the HVAC system.
- a memory is included within the HVAC system control unit and associated with the microcontroller.
- the memory is configured to store data associated with operation of the HVAC system.
- the HVAC system control unit is provided with a portable flash memory device interface for coupling the PFMD directly to the microcontroller.
- FIG. 8B presents additional optional steps in the method 800 .
- the HVAC system control unit is configured to download a firmware update from the portable memory device.
- the firmware update may be installed by the microcontroller 410 in the program memory 420 , e.g.
- the HVAC system control unit is configured to download a previously stored configuration file from the portable flash memory device.
- the HVAC system control unit is configured to adapt the HVAC system to operate in conformity with the previously stored configuration file.
- the HVAC system control unit is configured to store the data on the PFMD in an encrypted form.
Abstract
An HVAC system includes an enclosure for containing components of the HVAC system. Associated with the enclosure is an HVAC system control unit including a microcontroller for controlling an operation of the HVAC system. The HVAC system control unit further includes a memory associated with the microcontroller and configured to store data associated with operation of the HVAC system. The microcontroller is configurable to directly transfer the data between the memory and a portable flash memory device. The HVAC system control unit further includes a portable flash memory device interface for coupling the portable flash memory device directly thereto.
Description
- This application claims the benefit of U.S. Provisional Application Ser. No. 61/180,405, filed by Mark Beste, et al., on May 21, 2009, entitled “Comprehensive HVAC Control System,” commonly assigned with this application and incorporated herein by reference.
- This application is directed, in general, to a heating, ventilation and air conditioning (HVAC) and, more specifically, to control and configuration of HVAC systems.
- HVAC systems are typically serviced on a regular or intermittent basis for installation, repair and maintenance. An owner of an HVAC system being serviced typically contracts with a local HVAC service provider to perform such service. The service provider or an agent thereof performs the contracted service by visiting the site of the HVAC system. The system may be located in a location that is difficult to reach, such as a building rooftop. Such locations are not easily amenable to transporting equipment to the HVAC system site, especially heavy and/or bulky equipment. Exposure to the elements discourages use of some equipment, such as computers that have not been hardened to operate in adverse environmental conditions. Furthermore, in many cases a service technician may not be trusted with possession of valuable electronic devices such as a portable computer.
- One aspect provides an HVAC system including an enclosure for containing components of the HVAC system. Associated with the enclosure is an HVAC system control unit including a microcontroller for controlling an operation of the HVAC system. The HVAC system control unit further includes a memory associated with the microcontroller and configured to store data associated with operation of the HVAC system. The microcontroller is configurable to directly transfer the data between the memory and a portable flash memory device. The HVAC system control unit further includes a portable flash memory device interface for coupling the portable flash memory device directly thereto.
- Another aspect provides a method of manufacturing an HVAC system. The method includes configuring an enclosure to contain components of an HVAC system. An HVAC system control unit is located within the enclosure and includes a microcontroller for controlling an operation of the HVAC system. A parameter memory associated with the microcontroller is included within the HVAC system control unit. The method further includes configuring the parameter memory to store data associated with operation of the HVAC system. The microcontroller is configurable to directly transfer the data between the memory and a portable flash memory device. The HVAC system control unit is provided with a portable flash memory device interface for coupling the portable flash memory device directly to the microcontroller.
- Yet another aspect provides an HVAC system control unit, including a microcontroller. The microcontroller is configured to controlling an operation of an HVAC system. A memory associated with the microcontroller is configured to store data associated with operation of the HVAC system, and further configurable to directly transfer the data between the memory and a portable flash memory device. The HVAC system control unit includes a portable flash memory device interface for coupling the portable flash memory device directly to the microcontroller.
- Reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
-
FIG. 1 illustrates a cluster of HVAC systems on a rooftop; -
FIG. 2 illustrates an HVAC system of the disclosure including an HVAC system control unit; -
FIG. 3 illustrates an HVAC system control unit including a portable flash memory device port; -
FIG. 4 illustrates a schematic of an embodiment of the HVAC system control unit; -
FIG. 5 presents a method of servicing an HVAC system; -
FIG. 6 illustrates an HVAC system profile; -
FIG. 7 presents a method of verifying service to an HVAC system; and -
FIGS. 8A and 8B present a method manufacturing an HVAC system. - Commercial HVAC system operators, such as a corporation, partnership, an individual, or any other entity that contracts with a HVAC service provider for maintenance of an HVAC system, are increasingly concerned about the quality of service performed on HVAC systems by HVAC service providers (corporate or individual service technicians), e.g., the impact on energy efficiency, and the desire to control service expenses. Completeness of service, future service needs, and anticipated capital improvements are determined from data collected from currently operated HVAC systems. Moreover, operators seek to ensure that services performed are handled efficiently, quickly, and cost-effectively. However, the data available to the operators is incomplete.
- Some information regarding a HVAC unit is provided by a service technician who visits the unit to perform installation, repairs or maintenance. However, such information is typically limited in scope, and the operator has no way to verify if the reported data are correct. In some cases, an HVAC system is networked, with some data related to the operation of the HVAC system being available to the operator. However, in conventional HVAC operation such data do not guarantee that the service technician has physically visited the HVAC unit. Thus, the operator has no way to verify that repairs that do not modify data obtained via the network have been performed as contracted.
- In a related aspect of HVAC maintenance, call-in service centers may provide assistance to a service technician or HVAC system operator. A remote service provider located at the call-in center is often placed in the position of attempting to solve complex issues without detailed data regarding the subject HVAC system. There thus exists a need to provide the remote service provider with precise and timely data from the HVAC unit to improve efficiency and effectiveness of call-in center support.
- Some HVAC systems are configured to accept a connection from a portable computer, e.g. a laptop computer. Such a connection may be used, e.g., during the manufacturing process to configure the HVAC system. However, the utility of such a connection after the HVAC system is installed is extremely limited, as service technicians frequently do not have a portable computer, and the site of installation, e.g., outdoors, often on a building roof, is generally poorly suited for portable computers. In addition, the weight of the portable computer may create difficulty or hazard to the service technician when accessing a rooftop HVAC system, e.g., climbing a ladder.
- None of Trane, Carrier, York, Aaon or other residential or commercial HVAC manufacturers are known to have recognized the benefits provided by the various embodiments provided herein. Thus, the need exists to verify service, document changes, and provide a lightweight method to transfer information.
- The present disclosure benefits from the unique recognition that portable and inexpensive flash memory may be advantageously used in an HVAC service setting for various purposes to speed service, reduce the cost of service, and ensure service is performed. Portable flash memory devices (PFMDs) have become ubiquitous in consumer electronics. Readily available and relatively insensitive to water and dirt, these devices provide a convenient medium for data transfer by an HVAC service technician in various embodiments described herein. The following description is provided in the context of rooftop commercial HVAC units, but the disclosure is not limited thereto. For example, an
HVAC system 120 may be commercial or residential, located on a rooftop or at ground level. - Turning initially to
FIG. 1 , acluster 110 ofHVAC systems 120 a-120 f is located on a rooftop of abuilding 130. TheHVAC systems 120 may be configured to cool the interior space of thebuilding 130. Thecluster 110 may be managed via a centralized management system operated by an owner or lessee of thebuilding 130. For example, thebuilding 130 may be one of many retail stores operated by a national chain. The store owner may manage thecluster 110 from a central location to monitor energy consumption and provide general maintenance. -
FIG. 2 illustrates internal aspects of theHVAC system 120, sometimes referred herein to simply as thesystem 120. Thesystem 120 includes anenclosure 205 for containing various components of thesystem 120. Thesystem 120 includes acompressor 210, acondenser coil 220 and anevaporator coil 230. The operation of thesystem 120 is described without limitation in the context of cooling air in an interior space of thebuilding 130. Thecompressor 210 compresses a refrigerant that flows to thecondenser coil 220 over which afan 240 moves air to transfer heat to the ambient environment. The refrigerant flows through anexpansion valve 250, cools and flows through theevaporator coil 230. Air from an interior space being conditioned by thesystem 120 is cooled as it is moved past theevaporator coil 230 by ablower 260. The operation of the various components of thesystem 120 is controlled at least in part by an HVACsystem control unit 270, or simply controlunit 270. Thesystem 120 is an integrated HVAC system, including both thecondenser coil 220 and theevaporator coil 230 within theenclosure 205. Other HVAC systems are also within the scope of the disclosure, including indoor units, outdoor units, attic units, and heat pumps. -
FIG. 3 illustrates an embodiment of thecontrol unit 270, presented without limitation. Thecontrol unit 270 may include adisplay 310 and aninput keypad 320. Thedisplay 310 may present various menus, parameters, and other configuration information to a user. Thekeypad 320 may accept user input to make selections presented to the user by thedisplay 310, navigate among menus, and input configuration parameters. Selections may be finalized by anenter button 325. Thecontrol unit 270 may advantageously include amenu map 330 for reference by the user when interacting with thecontrol unit 270. - The
control unit 270 also includes a portable flash memory device (PFMD)port 340. Theport 340 may be a hard-wire port or may include a wireless port that can communicate wirelessly with a PFMD device. In one embodiment, thePFMD port 340 is configured to couple a PFMD to thecontrol unit 270. ThePFMD port 340 is illustrated without limitation as a universal serial bus (USB) port. However, embodiments contemplated by the disclosure more generally include any conventional or future-developed portable device including flash memory (FM) or equivalent. Herein and in the claims, FM includes without limitation, e.g., USB flash memory, also known as thumb drives, jump drives, pen drives, and other colloquial terms; Memory Stick™; SmartMedia™, Compact Flash™ (CF) in its various revisions and form factors; Secure Digital™ (SD); and any other functional equivalent of the aforementioned flash memory types, including future-developed portable rewritable solid state memory technology. Hereinafter the disclosure may present various embodiments with reference to the USB FM. Such embodiments are presented without limitation to the type of FM employed. - Turning to
FIG. 4 , an example embodiment of thesystem control unit 270 is illustrated without limitation. Thecontrol unit 270 includes, as previously described, thekeypad 320, thedisplay 310 and thePFMD port 340. Amicrocontroller 410 accepts inputs from thekeypad 320 and provides output data to thedisplay 310. Themicrocontroller 410 may be any conventional or future developed microcontroller, microprocessor or state machine, e.g. Themicrocontroller 410 operates in response to program instructions read from aconventional program memory 420 to control aspects of the operation of theHVAC system 120. The program instructions are sometimes referred to as “firmware.” Theprogram memory 420 may include both nonvolatile memory for persistent storage of program instructions and volatile memory for temporary storage of data. The memory may also include rewritable memory, e.g., flash memory, to allow for updating of the program instructions. - Among the functions of the
microcontroller 410 is storage in aconventional parameter memory 430 of parameters associated with operation of thesystem 120. Parameters may include, e.g., hardware configuration settings, component serial numbers, installed options, hardware revisions, control algorithm coefficients, operational data, diagnostics, service history, temperature set points and setback times. Theparameter memory 430 may be volatile or nonvolatile, though in various embodiments nonvolatile memory, e.g. flash memory, may be preferred to retain stored parameters if power to thesystem 120 is interrupted. - The
microcontroller 410 interacts with other components of thesystem 120 via asystem interface 440. Thesystem interface 440 may include necessary electronic components to address various components of thesystem 120, and to provide control signals at appropriate voltage levels. Anetwork interface 450 may provide an interface to a network, e.g., a local area network (LAN) or the internet. Thenetwork interface 450 may allow monitoring of various operational aspects of thesystem 120, such as operational status, and power consumption. Acomputer interface 460 provides a means to couple a computer to thecontrol unit 270. Thecomputer interface 460 is conventionally used to configure thesystem 120 during the manufacturing process, e.g. - A
PFM interface 470 couples themicrocontroller 410 to aPFMD 480. ThePFM interface 470 provides any necessary signal buffering and/or address encoding/decoding and/or control signals necessary to read from or write to memory locations within thePFMD 480. In some embodiments thePFM interface 470 is wholly contained within the functionality of themicrocontroller 410. In other embodiments thePFM interface 470 is implemented by one or more components separate and distinct from themicrocontroller 410. - The
program memory 420 includes instructions that configure themicrocontroller 410 to transfer data between thePFMD 480 and theparameter memory 430. In various embodiments such transfer is in response to commands entered by a user via thekeypad 320. In some embodiments, themicrocontroller 410 is configurable to recognize the presence of thePFMD 480 when thePFMD 480 is inserted into thePFMD port 340, and to automatically transfer data between theparameter memory 430 and thePFMD 480 without the need for a user command. - The
PFMD port 340 provides a means for the service technician to directly transfer data between thePFMD 480 and theparameter memory 430. Herein and in the claims, the phrase “directly transfer” and variations thereof mean that data are transferred between thePFMD 480 and theparameter memory 430 without the involvement of an intervening computer, such as a portable computer or network server. Themicrocontroller 410 is not an intervening computing device in this context. - In various embodiments, the
microcontroller 410 stores system configuration data in theparameter memory 430 in a system profile, e.g., a binary or ASCII file. The system profile may include various parameters associated with operation of thesystem 120. In some embodiments the system profile includes several hundred individual settings. In particular, the parameters may define an operational configuration of thesystem 120 that defines the behavior of thesystem 120. By this it is meant twosystems 120 that are similarly configured with respect to HVAC components (compressor, fans, blowers, etc.) will behave essentially in the same manner in all operationally significant aspects when a particular system profile is installed on both systems. Thus, e.g.,systems 120 in thecluster 110 may be configured to operate in a same manner by installation of a common configuration file on eachsystem 120 in thecluster 110. -
FIG. 5 illustrates a method generally designated 500 of servicing an HVAC system that advantageously benefits from the transferability of the configuration file via thePFMD 480. In astep 510, a service provider, e.g., HVAC technician, transfers a configuration profile from afirst HVAC system 120 to thePFMD 480. The HVAC technician may be servicing oneHVAC system 120 in thecluster 110, e.g. As part of the servicing, the technician may change one or more parameters that in turn changes an aspect of the performance of thesystem 120 being serviced. It may be desired to similarly modify all thesystems 120 in thecluster 110 so all thesystems 120 operate with essentially the same characteristics. - As mentioned previously, the technician is very unlikely to have a portable computer available to assist configuring the
other systems 120 in the cluster. Thus, in conventional practice the technician typically repeats the configuration process for eachother system 120 in the cluster. In cases in which an HVAC system includes an interface similar to thecontrol unit 270, but lacks thePFMD port 340, the technician may need to enter multiple parameter changes via a keypad, involving hundreds of key presses. When an HVAC cluster includes more than a small number of HVAC systems, the time required to enter changes to all the systems is time consuming and may result in considerable expense. - In contrast to conventional practice, in a
step 520 the technician transfers the configuration file from thePFMD 480, previously obtained from thefirst system 120, to asecond HVAC system 120. Themicrocontroller 410 is configured to transfer the configuration file directly, e.g., without the assistance of another computer system, from thePFMD 480 to theparameter memory 430 of thesecond HVAC system 120. If the configuration file is encrypted, as discussed below, themicrocontroller 410 may also decrypt the contents thereof before storing the parameters in theparameter memory 430. Thecontrol unit 270 may be configured to effect the transfer with a small number of key strokes, resulting in rapid reconfiguration of thesecond system 120. Of course, thesecond system 120 need not be in close proximity to thefirst system 120. The technician may store thePFMD 480 in his or her pocket and reconfigure any number ofother systems 120 over any time period at any location. The technician may even haveseveral PFMDs 480, one each for different models or configurations of theHVAC system 120. In some embodiments themicrocontroller 410 stores the configuration file with a time stamp or other identifying string that allows the technician to retrieve one of two or more configuration files from thePFMD 480 that corresponds to a desired configuration of thesystem 120. Thus multiple system configurations may be stored on and retrieved from asingle PFMD 480. - Finally, in a
step 530 the first and thesecond HVAC systems 120 are operated in conformity with the configuration file stored in theparameter memory 430. - In various embodiments the
control unit 270 is configured to generate a service verification report. The service verification report is a data structure that may be written to thePFMD 480. In various embodiments the data structure includes various data relevant to determining that the service technician performed services to thesystem 120. Examples of such data include, without limitation, a date, a time, a serial number of an HVAC unit, a technician ID, configuration parameters as configured prior to the service, and configuration parameters as configured after the service. Thesystem control unit 270 is configured in various embodiments to copy the service verification report from a memory, e.g., theparameter memory 430, to thePFMD 480. The transfer may be initiated by key strokes by the technician via thekeypad 320, e.g. In some embodiments the service verification report is generated “on the fly” when a request to transfer the report to thePFMD 480 is made. In such cases, the microcontroller may draw from data available in other locations or contexts in thesystem 120, e.g., the configuration file, time and data from a system clock, etc., while generating the service report. The service verification report may be provided to the HVAC operator to verify the presence of the technician at thesystem 120 being serviced, as described further below. - Turning to
FIG. 6 , illustrated is an embodiment of a portion of aservice verification report 600. Thereport 600 may have as many data fields as are desired. Thereport 600 includes a number of fields for illustration. Afield 605 may include an identifying string, such as a file name. Afield 610 may include a time stamp, date stamp or similar manner of indicating a time thereport 600 is generated. Afield 615 may indicate a control mode in which thesystem 120 is configured to operate, such as, e.g., heating or cooling. Afield 620 may include operating set points, such as a target cooling temperature or a target heating temperature. Afield 625 may include backup set points, e.g., set points that are used if a primary control fails. Afield 630 may include a parameter indicating whether the system is configured to use fresh or tempered air. Afield 635 may include a parameter indicating whether discharge air is heated or cooled. Afield 640 may include a parameter indicating whether thesystem 120 is configured for multistage air flow. Afield 645 may include a unit serial number.Fields field 650 may include an end-of-file marker. - A feature of various embodiments presented herein is the ability to ensure integrity of data on the
PFMD 480. A service provider might be tempted to tamper with data on thePFMD 480, such as a configuration file or a service verification report, to create the false appearance that service was performed. It is an objective of various embodiments herein to provide a high confidence level on the part of an HVAC operator that data provided via thePFMD 480 to support a service claim is authentic. - Thus, in some embodiments the
report 600 includesauthentication data 655. Theauthentication data 655 may be used to verify the integrity of thereport 600 when the HVAC operator determines if a service claim properly reflects services rendered. Theauthentication data 655 may include, e.g., values derived from other data fields in thereport 600. For example, theauthentication data 655 may include a CRC computed for a proper subset of the data fields. Theauthentication data 655 may be placed in multiple locations in thereport 600, and may be encrypted. In some cases, multiple inclusions of identical information may be placed in multiple locations in thereport 600, with different encryption schemes used for duplicate inclusions. In some cases, the entire service verification report is encrypted by themicrocontroller 410 when written to thePFMD 480. - More generally, a service verification report, such as the
report 600, is but one type of electronic verification file that may be used to verify the presence of the service provider at thesystem 120. The system profile may also be used in this manner, as well as any electronic verification file that includes data that may obtained easily by the operator only by being present at thesystem 120. - After the electronic verification file is transferred to the
PFMD 480, the service provider may transport the PFMD 380 to a location from which he or she may provide the electronic verification file to the HVAC operator in a form the HVAC operator may use to verify the presence of the service provider at thesystem 120. For example, the service provider may provide the PFMD 380 to the HVAC operator, may upload the electronic verification file to a database or server accessible to the HVAC operator, or may attach the electronic verification file to an electronic message (e.g., email). An electronic message may, for example, include a service invoice and the service verification file. The HVAC operator may then authenticate the service verification file, verify requested services were actually performed, and remit payment to the service provider. - A method generally designated 700 of verifying the performance of service using an electronic verification file is presented in
FIG. 7 . The method is described without limitation with reference to theservice verification report 600, and thesystem 120 and components thereof. In astep 710, a service provider causes thesystem 120 to transfer the electronic verification file to thePFMD 480. As described earlier, the service provider may cause the transfer by selecting appropriate commands on thesystem control unit 270. In astep 720, the service provider, or an agent thereof, provides the electronic verification file to the HVAC operator. The HVAC operator may process the electronic verification file by, e.g., decrypting the file, computing and verifying a CRC value, comparing serial numbers or model numbers with an equipment database, comparing a service provider serial number with a service provider database, etc. The HVAC operator may also receive an invoice associated with the services rendered by the service provider, either with the electronic verification file or by a separate route. In astep 730 the HVAC operator remits payment or credits an account of the service provider in response to verifying the authenticity of the received electronic verification file, and in some cases verifying that parameters contained by the system verification file indicate services were actually performed. - The
control unit 270 is also configured in various embodiments to provide additional useful functionality via thePFMD port 340. In one embodiment, thecontrol unit 270 is configured to update the program instructions located on theprogram memory 420 with updated program instructions located on thePFMD 480. The update may be in response to commands entered via thekeypad 320, or automatically when themicrocontroller 410 recognizes updated firmware on thePFMD 480. - In an embodiment the
control unit 270 is configured to store controller status logs and error logs on thePFMD 480. These data may be used, e.g., for later analysis by the HVAC operator, manufacturer or dealer. Such data may be uploaded to a service database, or otherwise transmitted to an interested party. In somecases system 120 operational data are transferred to thePFMD 480 and transferred to a remote service provider, such as a central manufacturer service center, or “help desk.” A remote agent, either human or machine, may use the operational data to diagnose system errors, malfunctions, etc. Possession of these data by the remote agent is expected to simplify diagnosis by the remote agent and reduce the time and expense needed to obtain advice, a diagnosis of an error, or other information from the remote agent. In some cases, the data are transferred to an analyst to determine operational trends of thesystem 120. For example, operational parameters may reveal trends relevant to preventative maintenance or reduction of energy consumption. - The
control unit 270 may also be configured to support various utility functions via thePFMD port 340. For example, when configured as a USB port, the PFMD port may provide power to a light or a fan, or may charge a portable electronic device such as a cell phone. - The
control unit 270 may also be configured to provide some diagnostic capability via thePFMD port 340. For example, thecontrol unit 270 may provide system data such as serial numbers, configuration data, firmware revisions, coolant pressure and error codes to a computer coupled to the PFMD port 380. In some embodiments, thecontrol unit 270 is configured to distribute power to it through thePFMD port 340 to energize sensors or other electronics necessary to effect the transfer of the aforementioned data. Such embodiments may have particular utility in a manufacturing or shipping context, to provide a means to determine the identity or basic health of thesystem 120 without the need to remove packing materials, open panels, etc. - Turning now to
FIG. 8A , a method generally designated 800 of manufacturing an HVAC system is presented. The method is described without limitation with reference to thesystem 120 and components thereof. In astep 810, a housing such as theenclosure 205 is configured to contain components of theHVAC system 120. In astep 820, an HVAC system control unit such as thecontrol unit 270, is located within the housing. The interface includes a microcontroller for controlling an operation of the HVAC system. In a step 830 a memory is included within the HVAC system control unit and associated with the microcontroller. In astep 840 the memory is configured to store data associated with operation of the HVAC system. In astep 850, the HVAC system control unit is provided with a portable flash memory device interface for coupling the PFMD directly to the microcontroller. -
FIG. 8B presents additional optional steps in themethod 800. In astep 860, the HVAC system control unit is configured to download a firmware update from the portable memory device. The firmware update may be installed by themicrocontroller 410 in theprogram memory 420, e.g. In astep 870 the HVAC system control unit is configured to download a previously stored configuration file from the portable flash memory device. In astep 880, the HVAC system control unit is configured to adapt the HVAC system to operate in conformity with the previously stored configuration file. In astep 890, the HVAC system control unit is configured to store the data on the PFMD in an encrypted form. - Those skilled in the art to which this application relates will appreciate that other and further additions, deletions, substitutions and modifications may be made to the described embodiments.
Claims (21)
1. An HVAC system, comprising:
an enclosure for containing components of said HVAC system;
an HVAC system control unit including a microcontroller located within said enclosure for controlling an operation of said HVAC system;
said HVAC system control unit further including a memory associated with said microcontroller and configured to store data associated with operation of said HVAC system, said microcontroller configurable to directly transfer said data between said memory and a portable flash memory device; and
said HVAC system control unit further including a portable flash memory device interface for coupling said portable flash memory device directly thereto.
2. The HVAC system as recited in claim 1 , wherein said data comprises a system profile.
3. The HVAC system as recited in claim 1 , wherein said data comprises a service verification report.
4. The HVAC system as recited in claim 1 , wherein said interface is further configured to download a firmware update from said portable memory device.
5. The HVAC system as recited in claim 1 , wherein said portable flash memory device is a USB flash drive.
6. The HVAC system as recited in claim 1 , wherein said interface is further configured to download from said portable flash memory device a previously stored configuration file, and to configure said HVAC system to conform to said previously stored configuration file.
7. The HVAC system as recited in claim 1 , wherein said microcontroller is configurable to store said data on said portable flash memory device in an encrypted form.
8. A method of manufacturing an HVAC system, comprising:
configuring an enclosure to contain components of an HVAC system;
locating within said enclosure an HVAC system control unit including a microcontroller for controlling an operation of said HVAC system;
including within said HVAC system control unit a parameter memory associated with said microcontroller and configuring said parameter memory to store data associated with operation of said HVAC system, said microcontroller configurable to directly transfer said data between said memory and a portable flash memory device; and
providing said HVAC system control unit with a portable flash memory device interface for coupling said portable flash memory device directly to the microcontroller.
9. The method as recited in claim 8 , wherein said data comprises a system profile.
10. The method as recited in claim 8 , wherein said data comprises a service verification report.
11. The method as recited in claim 8 , further comprising configuring said HVAC system control unit to download a firmware update from said portable flash memory device.
12. The method as recited in claim 8 , wherein said portable flash memory device is a USB flash drive.
13. The method as recited in claim 8 , further comprising configuring said HVAC system control unit to:
download from said portable flash memory device a previously stored configuration file; and
adapt said HVAC system to operate in conformity with said previously stored configuration file.
14. The method as recited in claim 8 , further comprising configuring said HVAC system control unit to store said data on said portable flash memory device in an encrypted form.
15. An HVAC system control unit, comprising:
a microcontroller for controlling an operation of an HVAC system;
a memory associated with said microcontroller and configured to store data associated with operation of said HVAC system, said microcontroller configurable to directly transfer said data between said memory and a portable flash memory device; and
a portable flash memory device interface for coupling said portable flash memory device directly to said microcontroller.
16. The HVAC system control unit as recited in claim 15 , wherein said data comprises a system profile.
17. The HVAC system control unit as recited in claim 1 , wherein said data comprises a service verification report.
18. The HVAC system control unit as recited in claim 15 , wherein said interface is further configured to download a firmware update from said portable memory device.
19. The HVAC system control unit as recited in claim 15 , wherein said portable flash memory device is a USB flash drive.
20. The HVAC system control unit as recited in claim 15 , wherein said interface is further configured to download from said portable flash memory device a previously stored configuration file, and to configure said HVAC system to conform to said previously stored configuration file.
21. The HVAC system control unit as recited in claim 15 , wherein said microcontroller is configurable to store said data on said portable flash memory device in an encrypted form.
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US12/694,395 Active 2032-12-05 US9310089B2 (en) | 2009-05-21 | 2010-01-27 | Variable speed motor control method and apparatus |
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