WO2003025469A1 - Method and apparatus for controlling an air conditioning plant by wireless means - Google Patents

Method and apparatus for controlling an air conditioning plant by wireless means Download PDF

Info

Publication number
WO2003025469A1
WO2003025469A1 PCT/FI2002/000750 FI0200750W WO03025469A1 WO 2003025469 A1 WO2003025469 A1 WO 2003025469A1 FI 0200750 W FI0200750 W FI 0200750W WO 03025469 A1 WO03025469 A1 WO 03025469A1
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WO
WIPO (PCT)
Prior art keywords
terminal
air treatment
air conditioning
radio
treatment devices
Prior art date
Application number
PCT/FI2002/000750
Other languages
French (fr)
Inventor
Juhani Hyvärinen
Juhani Yli-Olli
Original Assignee
Fläkt Woods AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fläkt Woods AB filed Critical Fläkt Woods AB
Publication of WO2003025469A1 publication Critical patent/WO2003025469A1/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
    • G05D23/1905—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value associated with tele control
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a method and an apparatus as defined in the preamble of claim 1 for wireless control of an air conditioning plant.
  • Air treatment equipment used in air conditioning systems such as powered roof ventilators, air conditioning units and dampers, are generally mounted in an elevated position, either in interior spaces high in the upper part of a room (at or close to the ceiling), or outside on the roof of the building.
  • Air treatment devices may be controllable, such as e.g. powered roof ventilators having a stepless speed regulation system provided with a frequency converter, controlled by means of a control unit.
  • the control unit is often placed in conjunction with the powered roof ventilator.
  • the device is regulated by means of oper- ating switches provided in conjunction with it. This is relatively difficult as it involves the necessity of climbing onto the roof of the building.
  • a device may also be connected via control cables to the automation system of the building, in which case the device may be controlled using remote control.
  • the device may be connected by a cable to the control center of the building, which is relatively difficult to accomplish especially in connection with renovation of air conditioning systems in old buildings.
  • Patent specification US 5,743,465 discloses an air conditioning plant in which an air treatment device is controlled by a wireless technique using a control unit over a two-way link, with the control unit transmitting and the air treatment device receiving or the air treatment device transmitting and the control unit receiving signals.
  • the link may consist of a radio-frequency connection and the control unit may be a portable device, e.g. as disclosed in patent specification US 5,326,027.
  • a drawback with wireless control systems for controlling air conditioning equipment is that they are only designed for controlling individual devices, which means that larger air conditioning systems comprising a plurality of air treatment devices require several control units, leading to a complexity of the systems.
  • the object of the present invention is to eliminate the drawbacks of prior art and to achieve a new type of wireless control of an air conditioning plant, designed especially for controlling the operating state of air treatment devices and for monitoring the operation of air treatment devices working independently. It is also an object of the invention to achieve a system for the control of large air conditioning systems comprising a plurality of controllable air treatment devices.
  • the invention is based on the idea that the air treatment devices are interconnected via a wireless link and that they are controlled by wireless techniques using a common portable control device.
  • the system of the invention is very simple. For example, devices mounted on the roof can be controlled from the ground, and the same terminal can be used to control several devices.
  • control parameter data intended for each device e.g. from the Internet, with the result that the apparatus can be controlled and adjusted in a simple, reliable and fast manner.
  • Fig. 1 presents a system according to the invention for wireless control of pow- ered roof ventilators placed on the roof of a building
  • Fig. 2 presents another system according to the invention for wireless control of powered roof ventilators placed on the roof of a building
  • Fig. 3 presents a third system according to the invention for wireless control of powered roof ventilators placed on the roof of a building.
  • Fig. 1 shows four powered roof ventilators 3 - 6 placed on the roof 2 of a building 1 and a wireless terminal 7 controlling them, by means of which an installer 8 can control the powered roof ventilators from the ground. Using the terminal 7, a connection can be established to several air treatment devices simultaneously.
  • Each one of the powered roof ventilators 3 - 6 comprises a fan and an alternating-current motor driving it, controlled by a frequency converter.
  • the ventilator is controlled by means of a control unit comprised in it, e.g. on the basis of pressure and/or temperature measurement.
  • the control unit contains a microprocessor controlling its operation and a gateway serving to connect the control unit to the frequency converter provided in the ventilator.
  • each one of the powered roof ventilators 3 - 6 comprises a short-range radio-frequency transmitter/receiver system (range below 100 m), by means of which, using a protocol suited for the purpose, e.g. the Modbus protocol, control information communicated via the gateway can be sent and transmitted to the terminal 7 and, if necessary, to the other ventilators 3 - 6.
  • One 3 of the air treatment devices can send measurement data by radio to the other air treatment devices 4 - 6.
  • Such measurement data may consist of e.g. outdoor temperature data, in which case it is possible to reduce the number of temperature sensors needed in the air treatment machines, or it may be a command from a weekly timer to increase efficiency. This is represented in Fig. 2.
  • One of the powered roof ventilators can be configured as a master device, through which the control data is passed between the terminal 7 and the other roof ventilators, while the other roof ventilators are configured to act as slave devices in respect of data transfer.
  • Communication between the terminal 7 and the roof ventilators can also be so implemented that the terminal functions as master (Fig. 3).
  • all the roof ventilators can be identical if necessary and none of them needs to serve as a gateway for communication.
  • the terminal may consist of a simple short-range wireless system with a simple control unit for controlling and monitoring the powered roof ventilators.
  • the terminal 7 may also consist of e.g. a general-purpose mobile station communicating with a public data network over a GSM or GPRS connection or by a similar technique and using a short-range radio connection to communicate with the roof ventilators.
  • the terminal may also be e.g. a general-purpose mobile station communicating with the roof ventilator 3 via a GSM connection, in which case the device 3 is provided with a communication section that works with it in a corresponding manner over a GSM connection.
  • the installer may have a connection via the mobile station 7 to a public data network, e.g.
  • the terminal 7 can also be used for wireless retrieval of building-specific information relating to an air treatment device from a server housed in the building.
  • the air treatment devices can send, wirelessly and spontaneously without a specific request, information about their own operating state, an alarm or identification data at least to the user terminal 7.

Abstract

Method and apparatus for controlling an air conditioning plant by wireless means, in which method the air conditioning plant is controlled via a two-way radio-frequency link using at least one portable terminal (7) so that the operation of the air conditioning plant is controlled by means of the terminal (7) and the air conditioning plant can send monitoring and/or measurement data to the terminal. The plant comprises two or more air treatment devices (3-6), which can be interconnected via a radio-frequency transmitter-receiver system. The terminal (7) can be connected via the radio-frequency link with all the air treatment devices, so that the same terminal can be used to control several air treatment devices.

Description

Method and apparatus for controlling an air conditioning plant by wireless means.
The present invention relates to a method and an apparatus as defined in the preamble of claim 1 for wireless control of an air conditioning plant.
The air treatment equipment used in air conditioning systems, such as powered roof ventilators, air conditioning units and dampers, are generally mounted in an elevated position, either in interior spaces high in the upper part of a room (at or close to the ceiling), or outside on the roof of the building. Air treatment devices may be controllable, such as e.g. powered roof ventilators having a stepless speed regulation system provided with a frequency converter, controlled by means of a control unit. The control unit is often placed in conjunction with the powered roof ventilator. In this case, the device is regulated by means of oper- ating switches provided in conjunction with it. This is relatively difficult as it involves the necessity of climbing onto the roof of the building.
A device may also be connected via control cables to the automation system of the building, in which case the device may be controlled using remote control. However, a prerequisite for this is that the device be connected by a cable to the control center of the building, which is relatively difficult to accomplish especially in connection with renovation of air conditioning systems in old buildings.
Patent specification US 5,743,465 discloses an air conditioning plant in which an air treatment device is controlled by a wireless technique using a control unit over a two-way link, with the control unit transmitting and the air treatment device receiving or the air treatment device transmitting and the control unit receiving signals. The link may consist of a radio-frequency connection and the control unit may be a portable device, e.g. as disclosed in patent specification US 5,326,027.
A drawback with wireless control systems for controlling air conditioning equipment is that they are only designed for controlling individual devices, which means that larger air conditioning systems comprising a plurality of air treatment devices require several control units, leading to a complexity of the systems. The object of the present invention is to eliminate the drawbacks of prior art and to achieve a new type of wireless control of an air conditioning plant, designed especially for controlling the operating state of air treatment devices and for monitoring the operation of air treatment devices working independently. It is also an object of the invention to achieve a system for the control of large air conditioning systems comprising a plurality of controllable air treatment devices. The invention is based on the idea that the air treatment devices are interconnected via a wireless link and that they are controlled by wireless techniques using a common portable control device.
The details of the features of the method and apparatus of the invention are presented in the claims below.
The system of the invention is very simple. For example, devices mounted on the roof can be controlled from the ground, and the same terminal can be used to control several devices. In addition, by using the invention, it is possible to obtain control parameter data intended for each device e.g. from the Internet, with the result that the apparatus can be controlled and adjusted in a simple, reliable and fast manner.
In the following, the invention will be described in detail by the aid of an example with reference to the attached drawings, wherein
Fig. 1 presents a system according to the invention for wireless control of pow- ered roof ventilators placed on the roof of a building,
Fig. 2 presents another system according to the invention for wireless control of powered roof ventilators placed on the roof of a building, and
Fig. 3 presents a third system according to the invention for wireless control of powered roof ventilators placed on the roof of a building.
Fig. 1 shows four powered roof ventilators 3 - 6 placed on the roof 2 of a building 1 and a wireless terminal 7 controlling them, by means of which an installer 8 can control the powered roof ventilators from the ground. Using the terminal 7, a connection can be established to several air treatment devices simultaneously. Each one of the powered roof ventilators 3 - 6 comprises a fan and an alternating-current motor driving it, controlled by a frequency converter. The ventilator is controlled by means of a control unit comprised in it, e.g. on the basis of pressure and/or temperature measurement. The control unit contains a microprocessor controlling its operation and a gateway serving to connect the control unit to the frequency converter provided in the ventilator. Connected to the control unit by conventional analog signals are pressure and temperature sensors, which provide pressure and temperature information needed in the control of the air conditioning system. Moreover, each one of the powered roof ventilators 3 - 6 comprises a short-range radio-frequency transmitter/receiver system (range below 100 m), by means of which, using a protocol suited for the purpose, e.g. the Modbus protocol, control information communicated via the gateway can be sent and transmitted to the terminal 7 and, if necessary, to the other ventilators 3 - 6. One 3 of the air treatment devices can send measurement data by radio to the other air treatment devices 4 - 6. Such measurement data may consist of e.g. outdoor temperature data, in which case it is possible to reduce the number of temperature sensors needed in the air treatment machines, or it may be a command from a weekly timer to increase efficiency. This is represented in Fig. 2.
One of the powered roof ventilators can be configured as a master device, through which the control data is passed between the terminal 7 and the other roof ventilators, while the other roof ventilators are configured to act as slave devices in respect of data transfer. Communication between the terminal 7 and the roof ventilators can also be so implemented that the terminal functions as master (Fig. 3). In this case, all the roof ventilators can be identical if necessary and none of them needs to serve as a gateway for communication.
The terminal may consist of a simple short-range wireless system with a simple control unit for controlling and monitoring the powered roof ventilators. The terminal 7 may also consist of e.g. a general-purpose mobile station communicating with a public data network over a GSM or GPRS connection or by a similar technique and using a short-range radio connection to communicate with the roof ventilators. The terminal may also be e.g. a general-purpose mobile station communicating with the roof ventilator 3 via a GSM connection, in which case the device 3 is provided with a communication section that works with it in a corresponding manner over a GSM connection. In this case, the installer may have a connection via the mobile station 7 to a public data network, e.g. the Internet 9, so he/she can, for example, obtain technical data pertaining expressly to the roof ventilators in question, as well as application programs for their adjustment. The terminal 7 can also be used for wireless retrieval of building-specific information relating to an air treatment device from a server housed in the building.
When the terminal 7 advises the air treatment devices located nearby in the system of the invention that a chance for communication exists, the air treatment devices can send, wirelessly and spontaneously without a specific request, information about their own operating state, an alarm or identification data at least to the user terminal 7.
It is obvious to the person skilled in the art that different embodiments of the invention are not limited to the examples described above, but that they may be varied within the scope of the claims presented below. Although 'air treatment device1 in the example described above refers to a powered roof ventilator, applications of the invention may also involve other air conditioning units, dampers and also other air treatment devices.

Claims

1. Method for wireless control of an air conditioning plant, in which method the air conditioning plant is controlled via a two-way radio-frequency link using at least one portable terminal (7) so that the operation of the air conditioning plant is controlled by means of the terminal (7) and the air conditioning plant can send monitoring and/or measurement data to the terminal, characterized in that the plant comprises two or more air treatment devices (3-6), which can be inter- connected via a radio-frequency transmitter-receiver system, and that the terminal (7) can be connected via the radio-frequency link with all the air treatment devices, so that the same terminal can be used to control a plurality of air treatment devices.
2. Method according to claim 1 , characterized in that at least part of the wireless connection is set up using short-range radio equipment.
3. Method according to claim 1 , characterized in that, when the terminal (7) advises the air treatment devices in its vicinity that a chance for communication exists, the air treatment devices send monitoring and/or measurement data at least to the terminal without separate request.
4. Method according to claim 1 , characterized in that the terminal is a general- purpose terminal that can be used to set up a connection to a data network, so that the terminal can be applied to retrieve technical data and/or application programs relating to an air treatment device from the data network, such as the Internet.
5. Control apparatus for wireless control of an air conditioning plant, said appa- ratus comprising a radio-frequency transmitter-receiver system, which is used to control the air conditioning plant via a two-way radio-frequency link using at least one portable terminal (7) so that the operation of the air conditioning plant is controlled by means of the terminal (7) and the air conditioning plant can send monitoring and/or measurement data to the terminal, characterized in that the plant comprises two or more air treatment devices (3-6), which can be interconnected via the radio-frequency transmitter-receiver system, and that the terminal (7) can be connected via the radio-frequency link with the air treatment devices, so that the same terminal can be used to control a plurality of air treatment devices.
6. Apparatus according to claim 5, characterized in that the air treatment devices are set to function as master devices or slave devices so that a connection from the slave devices (4-6) to the terminal can be set up via the master device.
7. Apparatus according to claim 5, characterized in that at least some of the transmitter-receiver devices are short-range radio devices.
8. Apparatus according to claim 5, characterized in that the terminal is a general-purpose terminal that can be used to set up a connection to a data network, so that the terminal can be applied to retrieve technical data and/or application programs relating to an air treatment device from the data network, such as the Internet.
PCT/FI2002/000750 2001-09-21 2002-09-20 Method and apparatus for controlling an air conditioning plant by wireless means WO2003025469A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20011863 2001-09-21
FI20011863A FI20011863A (en) 2001-09-21 2001-09-21 Methods and devices for wireless control of an air treatment plant

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2896066A1 (en) * 2006-01-12 2007-07-13 Finimetal Sa Remote control for towel drying heater regulation device, has watertight case presenting control side that comprises control buttons and special control button for activating broadcasting receiver housed in case
US8182233B2 (en) 2007-07-13 2012-05-22 Rolls-Royce Plc Component with a damping filler
US8241004B2 (en) 2008-05-15 2012-08-14 Rolls-Royce, Plc Component structure
US8365388B2 (en) 2009-01-28 2013-02-05 Rolls-Royce Plc Method of joining plates of material to form a structure
US8529720B2 (en) 2008-07-24 2013-09-10 Rolls-Royce, Plc Aerofoil sub-assembly, an aerofoil and a method of making an aerofoil
US8701286B2 (en) 2010-06-02 2014-04-22 Rolls-Royce Plc Rotationally balancing a rotating part
US8920893B2 (en) 2009-01-27 2014-12-30 Rolls-Royce Plc Article with an internal structure
US8986490B2 (en) 2010-11-26 2015-03-24 Rolls-Royce Plc Method of manufacturing a component
US9022299B2 (en) 2007-04-13 2015-05-05 Basic Device Limited Radiators
CN109163763A (en) * 2018-09-18 2019-01-08 珠海格力电器股份有限公司 Detection method and detection device
US10619873B2 (en) 2015-03-16 2020-04-14 Air D Fin Oy Intelligent ventilation system

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WO2001050289A1 (en) * 2000-01-04 2001-07-12 Pni Corporation A home and vehicular automation and control-driven web portal
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2896066A1 (en) * 2006-01-12 2007-07-13 Finimetal Sa Remote control for towel drying heater regulation device, has watertight case presenting control side that comprises control buttons and special control button for activating broadcasting receiver housed in case
US9022299B2 (en) 2007-04-13 2015-05-05 Basic Device Limited Radiators
US8182233B2 (en) 2007-07-13 2012-05-22 Rolls-Royce Plc Component with a damping filler
US8381398B2 (en) 2007-07-13 2013-02-26 Rolls-Royce Plc Component with a damping filler and method
US8857054B2 (en) 2007-07-13 2014-10-14 Rolls-Royce Plc Method of forming an aerofoil with a damping filler
US8241004B2 (en) 2008-05-15 2012-08-14 Rolls-Royce, Plc Component structure
US8529720B2 (en) 2008-07-24 2013-09-10 Rolls-Royce, Plc Aerofoil sub-assembly, an aerofoil and a method of making an aerofoil
US8920893B2 (en) 2009-01-27 2014-12-30 Rolls-Royce Plc Article with an internal structure
US8365388B2 (en) 2009-01-28 2013-02-05 Rolls-Royce Plc Method of joining plates of material to form a structure
US8701286B2 (en) 2010-06-02 2014-04-22 Rolls-Royce Plc Rotationally balancing a rotating part
US8986490B2 (en) 2010-11-26 2015-03-24 Rolls-Royce Plc Method of manufacturing a component
US10619873B2 (en) 2015-03-16 2020-04-14 Air D Fin Oy Intelligent ventilation system
CN109163763A (en) * 2018-09-18 2019-01-08 珠海格力电器股份有限公司 Detection method and detection device

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