CN104819543A - System and Method of Protecting an HVAC System - Google Patents
System and Method of Protecting an HVAC System Download PDFInfo
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- CN104819543A CN104819543A CN201510149636.7A CN201510149636A CN104819543A CN 104819543 A CN104819543 A CN 104819543A CN 201510149636 A CN201510149636 A CN 201510149636A CN 104819543 A CN104819543 A CN 104819543A
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- hvac system
- abnormal conditions
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/41—Defrosting; Preventing freezing
-
- 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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
Abstract
Systems and methods are provided for operating a heating, ventilation, and/or air conditioning (HVAC) system that include recording a number of consecutive occasions in which a defrost mode is entered within a first predefined length of time after a heating cycle is entered, preventing operation of at least one component of the HVAC system for a second predefined length of time in response to entering the defrost mode a first predetermined consecutive number of occurrences within the first predefined length of time after a heating cycle is entered, recording a number of consecutive preventions of operation of the component of the HVAC system, and determining that a fault condition exists in the HVAC system in response to the number of consecutive temporary preventions of operation of the component of the HVAC system exceeding a second predefined number of occurrences.
Description
Background technology
Heating, ventilating and air conditioning system (HVAC system) can be used for heating and/or cool zone of comfort to comfortable temperature.Zone of comfort is generally the use part of inhabitation and/or commerce area, and can be set to different area conditions, as temperature conditions and damp condition.The part of HVAC system can be arranged on outdoor or some other places away from zone of comfort to carry out heat exchange.This place can refer to a surrounding area, and also has different temperature and humidity conditions.
Some HVAC system are heat pump.Heat pump can run at refrigerating mode usually, wherein utilizes kind of refrigeration cycle (as Rankine cycle) that the heat of zone of comfort is passed to surrounding area thus cooling zone of comfort.Heat pump also can run at heating mode usually, and wherein cold-producing medium flows through the direction of the parts of HVAC system on the contrary, makes heat be passed to zone of comfort from surrounding area, thus heating zone of comfort.Heat pump uses reversal valve to the flow of refrigerant commutation between the heat exchanger making compressor and be associated with zone of comfort and surrounding area usually.
If there is steam in surrounding area, then it can condense on the parts of the surrounding area of HVAC system.Thus, when the temperature of surrounding area is enough low, the outdoor parts of HVAC system can build up frost and/or ice, sometimes need the outdoor parts of the HVAC system to frosting and/or ice to defrost.In heat pump, refrigerant flow direction is contrary with its flow direction when heating mode, can defrost.Especially, flow of refrigerant makes heat during the defrosting of HVAC system parts be passed to surrounding area from zone of comfort.
Summary of the invention
In certain embodiments, disclose a kind of heating, ventilate and/or the operation method of air-conditioning (HVAC) system, comprising: all advance into defrosting mode what reach predetermined threshold in response to the continuous pre-determined number of HVAC system, detect abnormal conditions; And in response to these abnormal conditions of detection, stop the running of at least one parts of HVAC system to reach scheduled time length.
In further embodiments, disclose a kind of heating, ventilate and/or air-conditioning (HVAC) system, comprise system controller, it is configured to: all advance into defrosting mode what reach predetermined threshold in response to the continuous pre-determined number of HVAC system, detect abnormal conditions; And in response to these abnormal conditions of detection, stop the running of at least one parts of HVAC system to reach scheduled time length.
In some other embodiment, disclose a kind of heating, ventilate and/or the operation method of air-conditioning (HVAC) system, comprising: the number of times recurred be activated within first scheduled time length of record defrosting mode after heat cycles starts; There occurs the first continuous pre-determined number in response to situation about being activated within first scheduled time length of defrosting mode after heat cycles starts, stop the running of at least one parts of HVAC system to reach the second scheduled time length; The read-around ratio that the running of recording these parts of HVAC system is prevented from; And in response to these parts of HVAC system running by the read-around ratio that temporarily stops more than second continuous pre-determined number, determine that HVAC system exists abnormal conditions.
Accompanying drawing explanation
In order to more intactly understand the disclosure and advantage thereof, carry out reference below in conjunction with the accompanying drawing of brief description subsequently and association and detailed description book.
Fig. 1 is the schematic diagram of the HVAC system according to an embodiment of the present disclosure;
Fig. 2 is the schematic diagram of the air circulation path of the HVAC system of Fig. 1;
Fig. 3 is the flow chart of the method for closing HVAC system; And
Fig. 4 is the schematic diagram of general processor (such as, electronic controller or the computer) system being applicable to realize embodiment of the present disclosure.
Detailed description of the invention
Fig. 1 is the schematic diagram of the HVAC system 100 according to an embodiment of the present disclosure.HVAC system 100 comprises indoor unit 102, outdoor unit 104, and system controller 106.In certain embodiments, system controller 106 can run to control indoor unit 102 and/or outdoor unit 104 works.As directed, HVAC system 100 is so-called heat pumps, and its thermodynamic refrigerating circulation being selectively run one or more base closed is to provide refrigerating function and/or heating function.In other embodiments, HVAC system 100 can be some other heating, ventilation and/or air-conditioning system.
Indoor unit 102 comprises indoor heat exchanger 108, indoor fan 110 and indoor metering device 112.Indoor heat exchanger 108 can be plate-fin heat exchanger, and it is configured to allow the cold-producing medium in indoor heat exchanger 108 internal pipeline and contacts indoor heat exchanger 108 but and carry out heat exchange between the fluid separated of cold-producing medium.In other embodiments, indoor heat exchanger 108 can comprise the heat exchanger of pin fin heat exchanger, micro-channel heat exchanger or other any applicable types.
Indoor fan 110 can be cfentrifugal blower, and it comprises blower drum, is arranged on blower wheel in blower drum at least partly, and is configured for the blower motor of optionally rotary blower impeller.In further embodiments, indoor fan 110 can comprise the blower fan of mixed flow fan and/or other suitable type any.Indoor fan 110 can be configured to the modulation that can run under the multiple speed under one or more velocity intervals and/or variable speed fan.In further embodiments, indoor fan 110 can be configured to how fast blower fan, and it runs under multiple speed of service by optionally giving the multistage electromagnet winding power of difference of the motor of indoor fan 110.In some other embodiment, indoor fan 110 can be single speed blower fan.
Indoor metering device 112 can be electric motor-driven electric expansion valve (EEV).In some optional embodiments, indoor metering device 112 can comprise thermostatic expansion valve, capillary module and/or other suitable metering device any.Indoor metering device 112 can comprise cold-producing medium check-valves and/or associate with cold-producing medium check-valves, and/or uses refrigerant bypassing to make indoor metering device 112 can not measure refrigerant flow by the refrigerant flow of indoor metering device 112 or restricted passage indoor metering device 112 substantially on the contrary when cold-producing medium flows through indoor metering device 112.
Outdoor unit 104 comprises outdoor heat exchanger 114, compressor 116, outdoor fan 118, outdoor metering device 120 and reversal valve 122.Outdoor heat exchanger 114 can be pin fin heat exchanger, and but it is configured for and allows the cold-producing medium that carries and contact chamber external heat exchanger 114 in the inner passage of outdoor heat exchanger 114 and heat exchange between the cold-producing medium fluid of isolating.In further embodiments, outdoor heat exchanger 114 can comprise the heat exchanger of plate-fin heat exchanger, micro-channel heat exchanger or other suitable type any.
Compressor 116 can be multi-speed cyclone formula compressor, and it is configured for optionally pump refrigerant under multiple mass flowrate.In some optional embodiments, compressor 116 can be can run under one or more velocity intervals modulation compressor, reciprocating compressor, single speed compressor and/or any other suitable refrigeration compressor and/or refrigerated medium pump.
Outdoor fan 118 can be comprise the axial fan of fan blade assembly and be configured for the blower motor of optionally rotation blower fan blade assembly.In further embodiments, outdoor fan 118 can comprise blower fan and/or the air blast of mixed flow fan, cfentrifugal blower and/or other suitable type any.Outdoor fan 118 can be configured to the modulation and/or variable speed fan that can run under the multiple speed under one or more velocity intervals.In further embodiments, outdoor fan 118 can be configured to as how fast blower fan, and it runs under multiple speed of service by optionally giving the multistage electromagnet winding power of difference of the motor of outdoor fan 118.In some other embodiment, outdoor fan 118 can be single speed blower fan.
Outdoor metering device 120 can be thermostatic expansion valve.In some optional embodiments, outdoor metering device 120 can comprise Electronic Control motro drivien EEV, capillary module and/or other suitable metering device any.Outdoor metering device 120 can comprise cold-producing medium check-valves and/or associate with cold-producing medium check-valves, and/or uses refrigerant bypassing to make outdoor metering device 120 can not measure refrigerant flow by the refrigerant flow of outdoor metering device 120 or restricted passage outdoor metering device 120 substantially on the contrary when cold-producing medium flows through outdoor metering device 120.
Reversal valve 122 can be so-called four-way change-over valve.Reversal valve 122 is optionally controlled to change the refrigerant flowpath in HVAC system 100, describes in further detail below.Reversal valve 122 can comprise magnetic valve or be configured for other device of the parts optionally moving reversal valve 122 between run location.
System controller 106 can comprise display information and receive the touch screen interface of user's input information.System controller 106 can show the information relevant with the operation of HVAC system 100 and can receive the user's input information relevant with the operation of HVAC system 100.System controller 106 can be operated further to show information and be received the user's input information independently associating with HVAC system 100 and/or do not associate.In certain embodiments, system controller 106 can comprise temperature sensor and can be configured for the heating and/or cooling that control the region that HVAC system 100 associates further.In certain embodiments, system controller 106 can be configured to thermostat, for controlling the supply of the adjustment air to the region associated by HVAC system 100.
In certain embodiments, system controller 106 optionally with other component communication of the indoor controller 124 of indoor unit 102, the outdoor controller 126 of outdoor unit 104 and/or HVAC system 100.In certain embodiments, system controller 106 can be arranged to and communication bus 128 two-way choice communication.In certain embodiments, a part for communication bus 128 can comprise three lines and connect, and it is applicable to system controller 106 and is configured for the communication information between the one or more HVAC system parts connecting communication bus 128.
Further, system controller 106 can be configured by communication network 132 and optionally associates HVAC system parts and/or another device 130.In certain embodiments, communication network 132 can comprise cell phone network and comprise other devices 130 of mobile phone.In certain embodiments, communication network 132 can comprise internet and can comprise other device 130 of so-called smart mobile phone and/or other can be connected the moving radio communicating device of internet.
Indoor controller 124 can be equipped on indoor unit 102, and it is configurable for receiving information input, transmission information output, and via communication bus 128 and/or other suitable telecommunication media any and system controller 106, outdoor controller 126, and/or other any device carries out the communication of other side.In certain embodiments, indoor controller 124 is configurable for associating indoor personality module 134, receive the information relevant with the speed of indoor fan 110, transmission control outputs signal to electrothermal relay, transmit the information about indoor fan volume flow rate, association and/or in addition impact control air cleaner 136, and associate indoor EEV controller 138.In certain embodiments, indoor controller 124 is configurable for associating indoor fan controller 142 and/or the other operation affecting control room inner blower 110.In certain embodiments, indoor personality module 134 can comprise about the identification of indoor unit 102 and/or operation information and/or the positional information about outdoor metering device 120.
In certain embodiments, indoor EEV controller 138 can be arranged to the information received about the temperature and pressure of cold-producing medium in indoor unit 102.More particularly, indoor EEV controller 138 can be arranged to the information of temperature and pressure received about cold-producing medium turnover and/or indoor heat exchanger 108 inside.Further, indoor EEV controller 138 can be arranged to the indoor metering device 112 of association and/or affect metering device 112 in control room in addition.
Outdoor controller 126 can be equipped on outdoor unit 104, and it is configurable for receiving information input, transmission information output, in addition and via communication bus 128 and/or other suitable telecommunication media any and system controller 106, indoor controller 124, and/or other any device communicates.In certain embodiments, outdoor controller 126 is configurable for associating outdoor personality module 140, and it can comprise the information of identification about outdoor unit 104 and/or operation.In certain embodiments, outdoor controller 126 is configurable for receiving about the information of the environment temperature associated with outdoor unit 104, the temperature information about outdoor heat exchanger 114, and/or about in outdoor heat exchanger 114 and/or compressor 116 cold-producing medium turnover refrigerant temperature and/or pressure information.In certain embodiments, outdoor controller 126 configurable for transmit about monitoring, contact and/or in addition impact control outdoor fan 118, compressor oil tank heater, solenoid directional control valve 122, with adjustment and/or the information monitoring the relevant relay of the discharge refrigerant of HVAC system 100, the position of indoor metering device 112 and/or the position of outdoor metering device 120.Outdoor controller 126 can be configured for association driven compressor controller 144 further, and it is configured for power to compressor 116 and/or to control compressor 116.
The HVAC system 100 illustrated is configured for runs so-called refrigerating mode, and wherein heat is discharged in the cold-producing medium of heat heat exchanger 114 outdoor by the refrigerant suction in indoor heat exchanger 108.In certain embodiments, compressor 116 can run with compressed refrigerant and from the compressed refrigerant of compressor 116 pumping relatively-high temperature high pressure by reversal valve 122 to outdoor heat exchanger 114.When cold-producing medium is by outdoor heat exchanger 114, outdoor fan 118 can run to be introduced and contact chamber external heat exchanger 114 by air, conducts heat to outdoor heat exchanger 114 ambient air thus from cold-producing medium.Cold-producing medium originally can comprise liquid phase refrigerant and cold-producing medium by outdoor metering device 120 and/or outdoor around metering device 120 outdoor heat exchanger 114 be pumped into indoor metering device 112, outdoor metering device 120 does not hinder the flow of refrigerant under refrigerating mode substantially.Indoor metering device 112 can measure the passage of the cold-producing medium by indoor metering device 112, makes the pressure of the downstream refrigerant of indoor metering device 112 lower than the pressure of the upstream refrigerant of indoor metering device 112.Pressure reduction through indoor metering device 112 allows the downstream refrigerant of indoor metering device 112 expand and/or convert gas phase at least partly.Vapor phase refrigerant can enter indoor heat exchanger 108.When cold-producing medium is by indoor heat exchanger 108, indoor fan 110 can run introduced by air and contact indoor heat exchanger 108, and heat exchanger 108 ambient air conducts heat to cold-producing medium indoor thus.After this, cold-producing medium is by can again enter compressor 116 after reversal valve 122.
Under so-called heating mode, run HVAC system 100, reversal valve 122 can be controlled to change the flow path of cold-producing medium, and indoor metering device 112 can be deactivated and/or by bypass, and outdoor metering device 120 can be activated.In its heating mode, cold-producing medium can flow to indoor heat exchanger 108 from compressor 116 by reversal valve 122.Cold-producing medium does not substantially affect by indoor metering device 112 and can stand to flow through the pressure reduction of outdoor metering device 120.Cold-producing medium is by outdoor heat exchanger 114 and again enter compressor 116 after by reversal valve 122.Generally speaking, its operation is in cooling mode compared in HVAC system 100 operation in a heating mode, the role exchange of indoor heat exchanger 108 and outdoor heat exchanger 114.
The HVAC system 100 illustrated is so-called separation air conditioner systems, and wherein indoor unit 102 and indoor unit 104 are provided separately.The embodiment of HVAC system can comprise so-called packaging system, and wherein one or more parts of indoor unit 102 and one or more parts of outdoor unit 104 gather together in common enclosure or packing case.The HVAC system 100 illustrated is so-called pipe-line systems, and wherein indoor unit 102 is arranged to away from being conditioned region, needs ventilation shaft delivery cycle air thus.But, in an alternative embodiment, HVAC system can be configured to without pipe-line system, the indoor unit 102 wherein associated with outdoor unit 104 and/or multiple indoor unit 102 are substantially disposed in the space and/or region that are regulated by respective indoor unit 102, do not need ventilation shaft to carry the air regulated by indoor unit 102 thus.
Referring now to Fig. 2, the rough schematic of the air circulation path of the structure 200 regulated by two HVAC system 100 is shown.In this embodiment, structure 200 is contemplated that and comprises lower floor 202 and upper floor 204.Lower floor 202 comprises region 206,208 and 210, and upper floor 204 comprises region 212,214 and 216.The HVAC system 100 associated with lower floor 202 is configured for the air circulating and/or regulate lower region 206,208 and 210, and the HVAC system 100 associated with upper floor 204 is configured for the air circulating and/or regulate top area 212,214 and 216.
Except the parts of above-mentioned HVAC system 100, in this embodiment, each HVAC system 100 comprises ventilation equipment 146, prefilter 148, humidifier 150 and by-pass line 152 further.Ventilation equipment 146 can run optionally circulating air is introduced circulating air discharged to environment and/or by surrounding air.Prefilter 148 can comprise filter medium usually, and it optionally caught and/or retains relatively large particle before air leaves prefilter 148 and enters air purifier 136.Humidifier 150 can run the humidity regulating circulating air.By-pass line 152 can be utilized to regulate the ducted air pressure in formation circulating air flowing path.In certain embodiments, regulated by bypass air door 154 by the air stream of by-pass line 152, and the air stream of supply area 206,208,210,212,214 and 216 regulates by zone damper 156.
Each HVAC system 100 may further include zone thermometer 158 and area sensor 160.In certain embodiments, zone thermometer 158 can associate with system controller 106 and user can be allowed to control the temperature in region residing for thermostat 158, humidity and/or other Environmental adjustments parameter for region.Further, zone thermometer 158 can associate to provide the temperature in region residing for thermostat 158, humidity and/or other environmental feedback about region with system controller 106.In certain embodiments, area sensor 160 can associate to provide the temperature in region residing for area sensor 160, humidity and/or other environmental feedback about region with system controller 106.
Configurable for the bi-directional association each other and further configuration of multiple system controller 106 makes user any one system controller 106 can be adopted to monitor and/or control any one HVAC system parts, and not duct member and which zone association.Further, each system controller 106, each zone thermometer 158 and each area sensor 160 can comprise humidity sensor.Similarly, should wish that structure 200 can be equipped with multiple humidity sensor at multiple diverse location.In certain embodiments, user can select multiple humidity sensor effectively, and it is for controlling the operation of one or more HVAC system 100.
If outdoor temperature is enough low, then the outdoor parts of the outdoor unit 104 of HVAC system 100 is as the coil pipe of outdoor heat exchanger 114 can form ice or frost.In order to the formation of the ice that prevents or reduce on the outdoor parts of HVAC system 100 or frost, HVAC system 100 can enter defrosting mode, wherein makes HVAC system 100 heat the outdoor parts of HVAC system 100 by entering refrigerating mode.Also namely, the flow direction of cold-producing medium is heat region (as region 206,208,212,214 and 216) removing indoor, and is passed to the part of the possible frosting of outdoor unit 104.Such as, heat indoor region removes and is passed to the outdoor heat exchanger 114 of outdoor unit 104, freezes condensate to melt all that outdoor heat exchanger 114 accumulates.When defrosting mode startup can to the air auxiliary heating being supplied to room area, to prevent when needing to provide warm air, the air of supply becomes the cold of uncomfortable degree.
Multiple different parameter all can cause and enters defrosting mode, as power or the electric current of the temperature of ambient air temperature, outdoor heat exchanger 114, ambient air temperature and the difference (can be referred to as Δ T) of outdoor heat exchanger 114 temperature, the air-pressure drop flowing through outdoor heat exchanger 114, pressure of inspiration(Pi) and/or outdoor fan 118.Defrosting mode can stop based on outdoor heat exchanger 114 temperature threshold or other relevant parameter.
Such defrosting mode generally enough removings is frozen in the frost that outdoor heat exchanger 114 is formed because of vapor in the atmosphere.But, sometimes outdoor heat exchanger 114 gathers thicker ice, then needed extra defrosting.High especially or low especially Δ T then illustrates and belongs to these situations.When display is frozen thicker, then can enter time defrosting pattern, run defrosting mode first predetermined amount of time under this pattern, stop the second predetermined amount of time, and again run first time period.Start and stop the sustainable predetermined loop number of this timing cycle of defrosting mode, or the termination when icing minimizing on display room external heat exchanger 114.
In some cases, the parts of outdoor unit 104 or the miscellaneous part of HVAC system 100 freeze possibility extremely seriously.As ice storm can cause outdoor heat exchanger 114 to be wrapped up by thick ice sheet completely.The ice and for example melted to drop onto from roof outdoor heat exchanger 114 and freezes at this, causes forming ice bridge between outdoor fan 118 and the miscellaneous part of outdoor unit 104.Ice bridge can prevent the running of outdoor fan 118, thus may cause icing more serious.When this egregious cases occurs, time defrosting pattern may be not enough to removing and freeze, and all cannot remove until ice melts naturally.If instruction ice fully outdoor heat exchanger 114 remove, time defrosting pattern stops based on this instruction, then this instruction may extend time in also there will not be.Time defrosting pattern is basic within the above-mentioned time does not have continuous service in a effective manner.
Run in the time period extended or exit the miscellaneous part of defrost cycle to compressor 116 or HVAC system 100 and have infringement.In other words, heat pump, as the startup of the defrost cycle of HVAC system 100 or termination, understands the pressure of compressor 116 both sides of reversing instantaneously.When such reversion occurs, and in a period of time subsequently, compressor 116 can bear liquid refrigerant, and this can increase the pressure to compressor 116.In addition, oil viscosity is diluted, and bearing can be caused impaired.Further, liquid refrigerant is incompressible, and if liquid refrigerant enters the compressing mechanism of compressor 116, very high surge can be caused.Therefore do not wish to enter repeatedly and exit defrosting mode within the time period extended, especially when verbosely to run defrosting mode and unlikely remove enough ice to allow the operation returning heating mode.
In one embodiment, provide and determine when when ice accumulates too serious so that the technological means of repeatedly circulation timing defrosting mode also unlikely deicing fully on the outdoor parts of HVAC system 100.In an embodiment, HVAC system 100 is closed when above-mentioned situation occurs.As term used herein as " closedown " and similar term can refer to the operation preventing at least one HVAC system master unit, master unit refer to as compressor 116 or outdoor fan 118 etc. can because of repetitive cycling time defrosting pattern impaired parts.Some parts such as indoor fan, auxiliary heater, electronic processors or abnormity notifying system then can continue to operate in the down periods.Described by following more details, the technological means of closing HVAC system in extreme situation of freezing also can be used for the abnormal conditions of other types, but discussed herein mainly concentrates on the exception of freezing and causing.
One can be used for indicating on the outdoor parts of HVAC system 100 and occurs that the parameter of too much ice sheet is the rate of change of Δ T, and the difference also namely between atmospheric temperature and the temperature of outdoor heat exchanger 114 changes how soon have.It is known that the rate of change of the Δ T of system in serious frosting situation normally run be about 0.002 degree per second.In heavy ice situation, air-flow may be there is no by outdoor heat exchanger 114.Under this situation, the rate of change of Δ T be about 0.040 degree per second, or be higher than the speed of 20 times during more situation typical.Therefore, in one embodiment, beyond the rate of change of the Δ T of predetermined threshold value, it is more serious than the situation that can be enough to remove in time defrosting pattern to can be used for indicating the ice sheet of the outdoor parts of HVAC system 100.
Can be used for indicating the outdoor parts of HVAC system 100 to occur that other parameters of serious ice sheet comprise power or the electric current of air-pressure drop, pressure of inspiration(Pi) and/or the outdoor fan 118 flowing through outdoor heat exchanger 114.For these parameters any, equal definable threshold value, when exceeding this threshold value, the ice sheet then shown on the outdoor parts of HVAC system 100 is seriously piled up, or display exists the abnormal conditions of some other types.
In another embodiment, time-based program can be used for indicating the outdoor parts of HVAC system 100 to be covered by too many ice to such an extent as to the unlikely deicing fully of time defrosting pattern.More particularly, when heat pump starts heat cycles, with the outdoor parts of HVAC system 100 only has little frost or frostless time compared with, when there is serious ice sheet, system typically can enter defrosting mode sooner.After heat cycles starts, system has the time point how soon entering defrosting mode therefore can be used as the instruction of the capped serious ice sheet of outdoor parts.When seriously piling up with which display ice, can shutdown system be preferably but not make system start the circulation repeatedly unlikely told on.
In one embodiment, be less than predefined time span after heat cycles starts, as 15 minutes, defrosting mode started, and can it can be used as the preliminary instruction outdoor parts of HVAC system 100 occurring thick ice sheet.Owing to may there is the reason that other start defrost cycle after the blink that heat cycles starts, before more definite instruction occurs, preferred a series of preliminary instruction like this occurs continuously.In one embodiment, continue namely to start add up there being how many times defrosting mode to be shorter than threshold time continuously after heat cycles starts.When statistics reaches pre-determined number, as continuous three times, at HVAC system Temporarily Closed predetermined amount of time as 15 minutes.Namely, at least one main outdoor parts such as compressor 116 or the outdoor fan 118 of system are not temporarily allowed to running yet.If not yet reach pre-determined number, and defrosting mode be after heat cycles starts be longer than threshold time start, pre-determined number is reset to 0.Which ensure that a series of preliminary instruction that ice is built up must be recurred, to determine the instruction more determined.
In some cases, Temporarily Closed can alleviate and makes defrosting mode after heat cycles starts, repeatedly be shorter than situation about starting in threshold time.Therefore, the outdoor parts of HVAC system 100 occurs the final instruction of excessive ice preferably carries out a series of such Temporarily Closed before presenting continuously.In one embodiment, continue to add up generation how many times Temporarily Closed.When statistics reaches pre-determined number, as continuous three Temporarily Closeds, there is excessive ice in the outdoor parts that can be defined as HVAC system 100 to such an extent as to further defrost cycle is unlikely effective finally indicates.
In this case, HVAC system 100 unlikely suitably works, and has therefore had no reason to continue operational system again.So in one embodiment, when Temporarily Closed number of times reaches the pre-determined number of closedown, HVAC system 100 closes to prevent the compression shock to compressor 116 and miscellaneous part in unfruitful defrosting completely.At least one main outdoor parts such as compressor 116 or the outdoor fan 118 of closing the anti-locking system of HVAC system 100 energy completely operate, until the ice gathered removes to form a typical level of significance fully in defrosting mode.The owner of HVAC system 100 or operator carry out deicing by technical staff, naturally thawing or some other modes.If abnormal conditions are by other reasons but not gathering of ice causes, then needed to alleviate this abnormal conditions before HVAC system 100 is allowed to restart.In one embodiment, HVAC system 100 can provide some to indicate, and it is self-locked, thus needs request technology personnel or takes some other means to alleviate abnormal conditions.
Fig. 3 be run HVAC system as HVAC system 100 the flow chart of method 300.In a block 310, timer is started when heat cycles starts.In frame 320, after heat cycles starts a period of time, system enters defrosting mode, and timer stops.In frame 330, read the numerical value of timer to determine whether defrosting mode is less than startup in 15 minutes after heat cycles starts.In other embodiments, timer can use other threshold values.If defrosting mode is less than startup in 15 minutes after heat cycles starts, then in frame 340, the continuous how many times of the first counter lasting record defrosting mode is less than 15 minutes and namely starts after heat cycles starts.If defrosting mode starts after 15 minutes or more time after heat cycles starts, then, in frame 345, the first counter and the second counter described subsequently reset to 0.Program gets back to frame 310, and record heat cycles starts and defrost cycle start between the additional values of time.
After first rolling counters forward increase of frame 340, in frame 350, determine whether the first rolling counters forward equals 3.Also namely, determine whether that continuous three defrosting modes are less than startup in 15 minutes after heat cycles starts.In other embodiments, the first counter can use other numerical value as pre-determined number.If the first rolling counters forward is not equal to 3, program returns frame 310, and record heat cycles starts and defrost cycle start between the additional values of time.If the first rolling counters forward equals 3, in frame 360, HVAC system closes 15 minutes.In other embodiments, Temporarily Closed can use the time of other length.
In frame 370, after Temporarily Closed terminates, the second counter continues record and adds how many times Temporarily Closed.First counter resets to 0 thus it prepares to start to record how many times and reach timer threshold.Alternately, the program of frame 370 can occur before the program of frame 360.At frame 380, determine whether the second rolling counters forward equals 3, to represent that there occurs continuous three times closes.In other embodiments, the second counter can use other numerical value as pre-determined number.If the second rolling counters forward is not equal to 3, program returns frame 310, and record heat cycles starts and defrost cycle start between the additional values of time.
If the second rolling counters forward equals 3, then close representative heat pattern and the refrigerating mode of HVAC system completely at frame 390.Also namely running will may be completely no longer allowed to by least one main outdoor parts of impaired HVAC system 100 such as compressor 116 or outdoor fan 118 because of lasting use.Some parts such as indoor fan or auxiliary heater can be allowed to remain in operation.HVAC system 100 may not be allowed to reenter representative heat pattern or refrigerating mode, until technical staff repairs problem or adopt other programs to alleviate abnormal conditions.
In other embodiments, when there are other main abnormal situations, as Δ T high rate of change, flow through outdoor unit air-flow because of ice sheet gather outside the low or outdoor fan 118 of the loss of reason, the loss of cold-producing medium, pressure of inspiration(Pi) abnormal etc., a similar bolt down procedure can be adopted to close HVAC system 100.In these embodiments, the program in the frame 310,320 and 330 in Fig. 3 can be replaced by the detection of relevant abnormalities situation.Program remaining in Fig. 3 can continue to perform, wherein when continuous several times detects abnormal conditions, and HVAC system 100 Temporarily Closed, the read-around ratio of counter records system Temporarily Closed, and repeatedly continuously after Temporarily Closed, system is closed completely.Also namely, the parts that may damage because of the lasting permission running of system is stoped, until abnormal conditions alleviate.
As an example, if Δ T rate of change exceedes predefined threshold value in the pre-determined number that continuous print is measured, HVAC system 100 can Temporarily Closed.If pre-determined number appears in continuous print Temporarily Closed, then can close HVAC system completely.
Fig. 4 shows typical general processor (as electronic controller or computer) system 1300, comprises the processing unit 1310 being applicable to perform one or more embodiment disclosed herein.In certain embodiments, system controller 106 can comprise general processor system 1300.Except processor 1310 (it can be used as central processor unit or CPU), system 1300 can comprise network-in-dialing device 1320, random access memory (RAM) 1330, read-only storage (ROM) 1340, second-level storage 1350 and I/O (I/O) device 1360.In some cases, some of these parts may not exist maybe can be incorporated into have each other or other parts unshowned various combination in.These parts can be arranged in single physical entity or be arranged in more than one physical entity.Any operation undertaken by processor 1310 described herein by processor 1310 separately process or by processor 1310 with shown in figure or unshowned one or more parts combine process.
Processor 1310 performs instruction, code, computer program or letter, and it may from network-in-dialing device 1320, RAM1330, ROM1340 or second-level storage 1350 (it may comprise different disk databases such as hard disk, floppy disk, CD or other driving) access.Although only illustrate a processor 1310, multiple processor may be there is.Therefore, although instruction performs by processor and comes into question, instruction can by simultaneously, continuously or performed by one or more processor.Processor 1310 can be used as one or more CPU fragment and performs.
Network-in-dialing device 1320 can adopt modem, pool of modem, Ethernet device, general serial portion line (USB) interface device, Serial Interface, Token Ring device, Fiber Distributed Data Interface (FDDI) device, WLAN (WLAN) device, the such as radio set device of CDMA connecting mode (CDMA) device, for the global system of mobile communication (GSM) radio set device, for the whole world interoperability of microwave access (WiMAX) device, and/or the form of other well-known device for interconnection network.These network-in-dialing devices 1320 can make processor 1310 and internet or one or more radio communication network or other network service, and processor 1310 can receive information or processor 1310 can output information.
Network-in-dialing device 1320 also can comprise one or more radio transceiver component 1325, and it can transmit and/or receive the wireless data of electromagnetic wave, such as radio frequency signals or microwave frequency signal.Alternatively, data can in electric conductor or electric conductor surface propagate, in coaxial cable propagate, in waveguide propagate, in optical medium such as optical fiber propagate or at other Propagation.Radio transceiver component 1325 can comprise independent reception and transmission unit or single radio transceiver.The information transmitted by wireless set 1325 or receive can comprise the data processed by processor 1310 or the instruction will performed by processor 1310.This information can output to network from network reception, such as, with computer data baseband signal or the aspect inserted in carrier wave.Data can customize according to different sequence, wish for the treatment of or produce data, transmission or receive data.The baseband signal of current use, the signal inserting signal in carrier wave or other type or the signal shown from now on can be used as transmission medium and can produce according to multiple method well known by persons skilled in the art.
RAM1330 can be used to store of short duration data and perhaps for storing the instruction performed by processor 1310.ROM1340 is non-short-term memory device, and it typically has the memory capacity less than the memory capacity of second-level storage 1350.ROM1340 can be used to the possible data storing instruction and read in the implementation of instruction.RAM1330 and ROM1340 is obviously faster than second-level storage 1350 in access.Second-level storage 1350 is typically made up of one or more disc driver or tape drive, and if may be used for the non-of short duration storage of data or RAM1330 memory space large not thus all working data can not be preserved time as overflow data storage device.When selection performs this program or when needing information, second-level storage 1350 can be used for storing the program in RAM1330 of downloading to or instruction.
I/O device 1360 can comprise liquid crystal display (LCD), touch screen displays, keyboard, keypad, switch, dial, mouse, trace ball, sound pick-up outfit, card reader, tape reader, printer, video-frequency monitor, frequency converter, sensor or other well-knownly input or output device.Equally, wireless set 1325 can be regarded as the parts of I/O device 1360, for replace or as the additional components of network-in-dialing device 1320.
At least disclose an embodiment, and those skilled in the art are to change, the combination of the feature of embodiment and/or embodiment and/or improve and all fall into the scope of the present disclosure.Through the combination, integrated and/or omit embodiment feature and the embodiment that obtains also in the scope of the present disclosure of embodiment.Special provision number range or restriction, this clear and definite scope or restriction knownly should comprise scope or the restriction of the repetition of equal number, and in the scope falling into regulation or restriction, (such as, from about 1 to about 10 comprises 2,3,4 etc.; Be greater than 0.10 and comprise 0.11,0.12,0.13 etc.).Such as, as long as disclose, there is lower limit R
1with upper limit R
unumber range, any numerical value falling into this scope is also clearly open.Especially, the following numerical value of this scope is clearly openly fallen into: R=R
1+ k* (R
u-R
1), wherein k is along with the increment of 1% is from 1% to 100% change, that is, k be 1%, 2%, 3%, 4%, 5%......50%, 51%, 52%......95%, 96%, 97%, 98%, 99% or 100%.In addition, what be defined as above is also specifically disclosed by any number range of two R numerical definitenesses.Use about the term " optional " of any element in claim means that element is necessary or optional, or element not necessarily waits two selections all within the scope of the claims.The use of wider term such as " comprises ", " comprising " and " having " should be understood to into narrower term such as " by ... composition ", " in essence by ... composition " and " substantially by ... form " provide support.Therefore, protection domain is not limited by above-mentioned term, but is limited by following claim, and scope comprises whole equivalents of claim theme.Each and each claim are as being incorporated into disclosed in further in the embodiments of the invention in description and claim.
Claims (20)
1. heat, ventilate and/or the operation method of air-conditioning (HVAC) system, comprising:
All advance into defrosting mode what reach predetermined threshold in response to the continuous pre-determined number of HVAC system, detect abnormal conditions; And
In response to these abnormal conditions of detection, the running of at least one parts of HVAC system is stoped to reach scheduled time length.
2. method as claimed in claim 1, comprises further:
There occurs pre-determined number in response to these abnormal conditions of detection, stop the running of at least one parts of HVAC system until this abnormal conditions alleviate.
3. method as claimed in claim 1, comprises further:
Advance into defrosting mode in response to HVAC system in the predetermined threshold time, increase the counting of the first counter.
4. method as claimed in claim 3, comprises further:
In response to these abnormal conditions of detection, increase the counting of the second counter.
5. method as claimed in claim 4, comprises further:
Counting in response to the second counter adds pre-determined number, stops the running of at least one parts of HVAC system.
6. method as claimed in claim 5, wherein predetermined threshold comprises the scheduled time length after entering heat cycles.
7. method as claimed in claim 1, wherein predetermined threshold comprises the rate of change of the difference of ambient temperature and outdoor heat exchange actuator temperature.
8. method as claimed in claim 1, wherein these abnormal conditions comprise following at least one:
Flow through the pressure drop of the air of outdoor heat exchanger;
Pressure of inspiration(Pi); With
The power of outdoor fan or electric current.
9. method as claimed in claim 1, comprises further:
The notice of these abnormal conditions is provided.
10. heat, ventilate and/or air-conditioning (HVAC) system, comprising:
System controller, it is configured to:
All advance into defrosting mode what reach predetermined threshold in response to the continuous pre-determined number of HVAC system, detect abnormal conditions; And
In response to these abnormal conditions of detection, the running of at least one parts of HVAC system is stoped to reach scheduled time length.
11. as the HVAC system of claim 10, and its middle controller is configured to further: there occurs pre-determined number in response to these abnormal conditions of detection, stops the running of at least one parts of HVAC system until this abnormal conditions alleviate.
12. as the HVAC system of claim 10, and its middle controller comprises the first counter, and it is configured to advance in the predetermined threshold time counting that defrosting mode just increases by the first counter whenever HVAC system.
13. as the HVAC system of claim 10, and its middle controller comprises the second counter, and it is configured to whenever controller detects the counting that abnormal conditions just increase by the second counter.
14. as the HVAC system of claim 13, and its middle controller is configured to: the counting in response to the second counter adds pre-determined number, stops the running of at least one parts of HVAC system.
15. as the HVAC system of claim 10, wherein predetermined threshold comprise following at least one:
Enter the scheduled time length after heat cycles;
The rate of change of the difference of ambient temperature and outdoor heat exchange actuator temperature;
Flow through the pressure drop of the air of outdoor heat exchanger;
Pressure of inspiration(Pi); And
The power of outdoor fan or electric current.
16. as the HVAC system of claim 10, and its middle controller is configured to further: the notice providing abnormal conditions.
17. 1 kinds of heating, to ventilate and/or the operation method of air-conditioning (HVAC) system, comprising:
The number of times recurred be activated within first scheduled time length of record defrosting mode after heat cycles starts;
There occurs the first continuous pre-determined number in response to situation about being activated within first scheduled time length of defrosting mode after heat cycles starts, stop the running of at least one parts of HVAC system to reach the second scheduled time length;
The read-around ratio that the running of recording the parts of HVAC system is prevented from; And
In response to the running of the parts of HVAC system by the read-around ratio that stops temporarily more than the second pre-determined number, determine that HVAC system exists abnormal conditions.
18., as the method for claim 17, comprise further:
Stop the running of at least one parts of HVAC system until this abnormal conditions alleviate.
19., as the method for claim 17, comprise further:
The notice of abnormal conditions is provided.
20. as the method for claim 17, and wherein pre-determined number and the second pre-determined number are 3 continuously.
Applications Claiming Priority (2)
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|---|---|---|---|
| US201461933748P | 2014-01-30 | 2014-01-30 | |
| US61/933,748 | 2014-01-30 |
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| Publication Number | Publication Date |
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| CN104819543A true CN104819543A (en) | 2015-08-05 |
| CN104819543B CN104819543B (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510149636.7A Active CN104819543B (en) | 2014-01-30 | 2015-01-29 | The system and method for protecting HVAC system |
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| US (1) | US20150211779A1 (en) |
| CN (1) | CN104819543B (en) |
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| CN112696788A (en) * | 2020-12-23 | 2021-04-23 | 安徽郁金香新能源科技有限公司 | Variable water temperature control method for fan coil |
| CN113251733A (en) * | 2021-06-02 | 2021-08-13 | 珠海格力电器股份有限公司 | Defrosting control method and device and refrigeration equipment |
| CN113324328A (en) * | 2021-05-11 | 2021-08-31 | Tcl空调器(中山)有限公司 | Method and device for determining shielding frequency of refrigeration equipment and storage medium |
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| JP6731865B2 (en) * | 2017-02-06 | 2020-07-29 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner outdoor unit, air conditioner, and air conditioning management method |
| US10868857B2 (en) | 2017-04-21 | 2020-12-15 | Johnson Controls Technology Company | Building management system with distributed data collection and gateway services |
| US10739028B2 (en) * | 2017-06-09 | 2020-08-11 | Johnson Controls Technology Company | Thermostat with efficient wireless data transmission |
| US10333810B2 (en) | 2017-06-09 | 2019-06-25 | Johnson Controls Technology Company | Control system with asynchronous wireless data transmission |
| CN108800418A (en) * | 2018-06-13 | 2018-11-13 | 珠海格力电器股份有限公司 | Air-conditioning defrosting control method and air-conditioner controller |
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Also Published As
| Publication number | Publication date |
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| US20150211779A1 (en) | 2015-07-30 |
| CN104819543B (en) | 2018-12-18 |
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