EP1643193B1 - Method of determining the configuration of an air conditioning system - Google Patents

Method of determining the configuration of an air conditioning system Download PDF

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Publication number
EP1643193B1
EP1643193B1 EP05103945.1A EP05103945A EP1643193B1 EP 1643193 B1 EP1643193 B1 EP 1643193B1 EP 05103945 A EP05103945 A EP 05103945A EP 1643193 B1 EP1643193 B1 EP 1643193B1
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EP
European Patent Office
Prior art keywords
temperature
refrigerant control
outdoor
control valve
refrigerant
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.)
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Application number
EP05103945.1A
Other languages
German (de)
French (fr)
Other versions
EP1643193A3 (en
EP1643193A2 (en
Inventor
Hyun Soek Jung
Gyoo Ha Jung
Jong Kweon Ha
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Publication date
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Publication of EP1643193A2 publication Critical patent/EP1643193A2/en
Publication of EP1643193A3 publication Critical patent/EP1643193A3/en
Application granted granted Critical
Publication of EP1643193B1 publication Critical patent/EP1643193B1/en
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Classifications

    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F24F11/523—Indication arrangements, e.g. displays for displaying temperature data
    • 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
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/54—Heating and cooling, simultaneously or alternatively
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0314—Temperature sensors near the indoor heat exchanger
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air

Definitions

  • the present invention relates to a method, as defined by appended independent claim 1, of determining the refrigerant conduit connections between indoor units and control valves in a multi air conditioner system comprising an outdoor unit, a plurality of indoor unit, a plurality of refrigerant paths between the indoor units to the outdoor unit and refrigerant control valves in respective ones of said refrigerant paths.
  • the present invention also relates to a multi air conditioner system as defined by appended independent claim 9 comprising a controller (18) configured to carry out the above method.
  • a conventional multi air conditioner system comprises an outdoor unit, a plurality of indoor units connected in parallel to the outdoor unit, communication lines connected between the outdoor unit and the respective indoor units, power cables and refrigerant pipes.
  • the outdoor unit comprises a compressor, an outdoor heat exchanger and a plurality of motor-operated valves mounted in the refrigerant pipes.
  • An example of the conventional multi air conditioner system is disclosed in KR-A-1998-025714 .
  • an engineer When initially installing a conventional multi air conditioner system, as described above, an engineer connects the indoor units to the outdoor unit by the communication lines, the power cables and the refrigerant pipes. After that, the engineer measures the difference in temperature between the indoor units while opening and closing the motor-operated valves during cooling operation in order to determine which indoor units are connected to which respective refrigerant pipes (or the motor-operated valves).
  • cooling operation is carried out for determining how the indoor units are connected. This can result in the system becoming damaged. Specifically, the amount of refrigerant condensed in the outdoor heat exchanger is increased when the pipe connection determination is being performed in this way when the outdoor temperature is low.
  • the condensed refrigerant may not be sufficiently evaporated by the indoor heat exchangers and, therefore, the refrigerant is introduced into the compressor in a liquid state, which is harmful to the compressor.
  • JP7305879 relates to comparing an outdoor temperature to a threshold, and operating an indoor unit to either heat or cool depending on that comparison. In this way erroneous wiring can be discovered.
  • EP0678718 relates to automatically setting an address of an exterior device.
  • JP 2001 289480 relates to reducing the time required to check wiring in a multi-room air conditioner. Control vales are successively opened and temperature changes of the heat exchangers are discriminated.
  • An aspect of the present invention is a method of determining the refrigerant conduit connections between indoor units and control valves in a multi air conditioner system according to claim 1.
  • Another aspect of the present invention is a multi air conditioner system according to claim 9.
  • a multi air conditioner system comprises an outdoor unit 10, first to fourth indoor units 30, 40, 50, 60, connected to the outdoor unit 10, and a distributor 70 having first to fourth motor-operated valves 71, 72, 73, 74.
  • the outdoor unit 10 comprises a compressor 11 for compressing refrigerant, a four-way valve 12 for guiding the refrigerant flow, discharged from the compressor 11, an outdoor heat exchanger 13 which receives compressed refrigerant from the compressor 11, an outdoor fan 14 for forcibly blowing air across or through the outdoor heat exchanger 13 and an outdoor fan motor 15.
  • the outdoor unit 10 further comprises an outdoor temperature sensor 16 for measuring the outdoor temperature, an accumulator 17 for delivering gaseous refrigerant to the compressor 11, an outdoor unit microcomputer 18 for controlling the various components of the outdoor unit 10 and performing data communication with indoor unit microcomputers 36, 46, 56, 66, which are described below in detail; and a display part 19 for displaying the state of the multi air conditioner system.
  • the first to fourth indoor units 30, 40, 50, 60 comprise first to fourth indoor heat exchangers 31, 41, 51, 61 for performing heat exchange with introduced indoor air; first to fourth indoor fans 32, 42, 52, 62 for introducing indoor air into the first to fourth indoor units 30, 40, 50, 60, guiding the introduced air through the first to fourth indoor heat exchangers 31, 41, 51, 61 and discharging the air out of the first to fourth indoor units 30, 40, 50, 60, and first to fourth indoor fan motors 33, 43, 53, 63 for rotating the first to fourth indoor fans 32, 42, 52, 62.
  • the first to fourth indoor units 30, 40, 50, 60 further comprise first to fourth inlet temperature sensors 34, 44, 54, 64 mounted to pipes connected to the first to fourth indoor heat exchangers 31, 41, 51, 61, through which refrigerant is introduced (when performing a cooling operation), and first to fourth indoor unit microcomputers 36, 46, 56, 66 for controlling the respective components of the first to fourth indoor units 30, 40, 50, 60 and performing data communication with the outdoor unit microcomputer 18.
  • the first to fourth motor-operated valves 71, 72, 73, 74, mounted in the distributor 70, are connected to the first to fourth indoor units 30, 40, 50, 60 via refrigerant pipes to control the refrigerant flow rate into the first to fourth indoor units 30, 40, 50, 60.
  • the outdoor temperature sensor 16 measures outdoor temperature (80) to determine whether the measured outdoor temperature is higher than or equal to a reference temperature (82). If the outdoor temperature is higher than or equal to the reference temperature, cooling is performed (84). If the outdoor temperature is lower than the reference temperature, heating is performed (85).
  • the operating levels of the compressor 11, the outdoor fan 15 and the first to fourth indoor fans 32, 42, 52, 62 are appropriately controlled, according to operation modes, and the first to fourth motor-operated valves 71, 72, 73, 74 are maintained open at predetermined initial levels (86).
  • the temperatures at the inlets of the indoor units are measured by the first to fourth inlet temperature sensors 34, 44, 54, 64 respectively and the measured temperatures are stored (88). At this time, the temperatures at the inlets of the indoor units are temperate at the inlets of the respective indoor heat exchangers (based on the cooling operation).
  • the first motor-operated valve 71 is closed, while the other motor-operated valves 72, 73 and 74 remain open by an unchanged amount (90 and 92).
  • the temperatures at the inlets of the indoor units are measured again (94).
  • the predetermined period of time is set so that a change in temperature, resulting from the closing of the first motor-operated valve 25, is apparent.
  • the differences between temperatures at the inlets of the indoor units before closing the first motor-operated valve 71 and temperatures at the inlets of the indoor units after closing the first motor-operated valve 71 are calculated to determine whether there is an indoor unit where the temperature difference is more than a reference value (96). Such determination is made in order to prevent the temperature change at an indoor unit, where the inlet temperature has changed due to other causes than closing of the first motor-operated valve 71, from being incorrectly regarded as the indoor unit connected to the first motor-operated valve 71.
  • the reference value may be changed according to the system.
  • heating operation high-temperature refrigerant is not supplied to the indoor heat exchanger as the motor-operated valve is closed and, therefore, the temperature at the inlet of the indoor unit gradually decreases.
  • cooling operation low-temperature refrigerant is not supplied to the indoor heat exchanger as the motor-operated valve is closed and, therefore, the temperature at the inlet of the indoor unit gradually increases.
  • determination of whether the temperature at the inlet of the indoor unit has decreased more than the reference value, when the motor-operated valve is closed, is made when performing the pipe connection determination operation during heating operation, and determination as to whether the temperature at the inlet of the indoor unit has been increased more than the reference value as the motor-operated valve is closed is made when performing a pipe connection searching operation during the cooling operation.
  • the operation mode of the system is properly set depending on outdoor temperature when performing the pipe connection searching operation. Consequently, the present invention has the effect of preventing the pipe connection searching operation from being performed in improper operation modes, and therefore, preventing the system from being damaged.

Description

  • The present invention relates to a method, as defined by appended independent claim 1, of determining the refrigerant conduit connections between indoor units and control valves in a multi air conditioner system comprising an outdoor unit, a plurality of indoor unit, a plurality of refrigerant paths between the indoor units to the outdoor unit and refrigerant control valves in respective ones of said refrigerant paths. The present invention also relates to a multi air conditioner system as defined by appended independent claim 9 comprising a controller (18) configured to carry out the above method.
  • Generally, a conventional multi air conditioner system comprises an outdoor unit, a plurality of indoor units connected in parallel to the outdoor unit, communication lines connected between the outdoor unit and the respective indoor units, power cables and refrigerant pipes. The outdoor unit comprises a compressor, an outdoor heat exchanger and a plurality of motor-operated valves mounted in the refrigerant pipes. An example of the conventional multi air conditioner system is disclosed in KR-A-1998-025714 .
  • When initially installing a conventional multi air conditioner system, as described above, an engineer connects the indoor units to the outdoor unit by the communication lines, the power cables and the refrigerant pipes. After that, the engineer measures the difference in temperature between the indoor units while opening and closing the motor-operated valves during cooling operation in order to determine which indoor units are connected to which respective refrigerant pipes (or the motor-operated valves).
  • In the conventional multi air conditioner system, cooling operation is carried out for determining how the indoor units are connected. This can result in the system becoming damaged. Specifically, the amount of refrigerant condensed in the outdoor heat exchanger is increased when the pipe connection determination is being performed in this way when the outdoor temperature is low.
  • When the outdoor temperature is low, the condensed refrigerant may not be sufficiently evaporated by the indoor heat exchangers and, therefore, the refrigerant is introduced into the compressor in a liquid state, which is harmful to the compressor.
  • JP7305879 relates to comparing an outdoor temperature to a threshold, and operating an indoor unit to either heat or cool depending on that comparison. In this way erroneous wiring can be discovered.
    EP0678718 relates to automatically setting an address of an exterior device.
    JP 2001 289480 relates to reducing the time required to check wiring in a multi-room air conditioner. Control vales are successively opened and temperature changes of the heat exchangers are discriminated.
  • An aspect of the present invention is a method of determining the refrigerant conduit connections between indoor units and control valves in a multi air conditioner system according to claim 1.
  • Another aspect of the present invention is a multi air conditioner system according to claim 9.
  • Optional and preferred features of the present invention are set forth in claims 2 to 8 appended hereto.
  • An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
    • Figure 1 shows the refrigerant circuit of a multi air conditioner system according to the present invention;
    • Figure 2 is a block diagram showing the structure of the multi air conditioner system shown in Figure 1;
    • Figure 3 is a graph showing the opening and closing of indoor motor-operated valves when performing the pipe connection determination operation of the multi air conditioner system shown in Figure 1; and
    • Figure 4 is a flowchart illustrating the pipe connection determination operation of the multi air conditioner system shown in Figure 1.
  • Referring to Figures 1 and 2, a multi air conditioner system comprises an outdoor unit 10, first to fourth indoor units 30, 40, 50, 60, connected to the outdoor unit 10, and a distributor 70 having first to fourth motor-operated valves 71, 72, 73, 74.
  • The outdoor unit 10 comprises a compressor 11 for compressing refrigerant, a four-way valve 12 for guiding the refrigerant flow, discharged from the compressor 11, an outdoor heat exchanger 13 which receives compressed refrigerant from the compressor 11, an outdoor fan 14 for forcibly blowing air across or through the outdoor heat exchanger 13 and an outdoor fan motor 15.
  • The outdoor unit 10 further comprises an outdoor temperature sensor 16 for measuring the outdoor temperature, an accumulator 17 for delivering gaseous refrigerant to the compressor 11, an outdoor unit microcomputer 18 for controlling the various components of the outdoor unit 10 and performing data communication with indoor unit microcomputers 36, 46, 56, 66, which are described below in detail; and a display part 19 for displaying the state of the multi air conditioner system.
  • The first to fourth indoor units 30, 40, 50, 60 comprise first to fourth indoor heat exchangers 31, 41, 51, 61 for performing heat exchange with introduced indoor air; first to fourth indoor fans 32, 42, 52, 62 for introducing indoor air into the first to fourth indoor units 30, 40, 50, 60, guiding the introduced air through the first to fourth indoor heat exchangers 31, 41, 51, 61 and discharging the air out of the first to fourth indoor units 30, 40, 50, 60, and first to fourth indoor fan motors 33, 43, 53, 63 for rotating the first to fourth indoor fans 32, 42, 52, 62.
  • The first to fourth indoor units 30, 40, 50, 60 further comprise first to fourth inlet temperature sensors 34, 44, 54, 64 mounted to pipes connected to the first to fourth indoor heat exchangers 31, 41, 51, 61, through which refrigerant is introduced (when performing a cooling operation), and first to fourth indoor unit microcomputers 36, 46, 56, 66 for controlling the respective components of the first to fourth indoor units 30, 40, 50, 60 and performing data communication with the outdoor unit microcomputer 18.
  • The first to fourth motor-operated valves 71, 72, 73, 74, mounted in the distributor 70, are connected to the first to fourth indoor units 30, 40, 50, 60 via refrigerant pipes to control the refrigerant flow rate into the first to fourth indoor units 30, 40, 50, 60.
  • A pipe connection determination method for the above-described multi air conditioner will be described with reference to Figures 3 and 4.
  • When an engineer connects the motor-operated valves 71, 72, 73, 74 of the distributor 70 to respective indoor units 30, 40, 50, 60 and inputs a pipe connection determination command, using a test switch (not shown), the outdoor temperature sensor 16 measures outdoor temperature (80) to determine whether the measured outdoor temperature is higher than or equal to a reference temperature (82). If the outdoor temperature is higher than or equal to the reference temperature, cooling is performed (84). If the outdoor temperature is lower than the reference temperature, heating is performed (85). The operating levels of the compressor 11, the outdoor fan 15 and the first to fourth indoor fans 32, 42, 52, 62 are appropriately controlled, according to operation modes, and the first to fourth motor-operated valves 71, 72, 73, 74 are maintained open at predetermined initial levels (86).
  • Subsequently, the temperatures at the inlets of the indoor units are measured by the first to fourth inlet temperature sensors 34, 44, 54, 64 respectively and the measured temperatures are stored (88). At this time, the temperatures at the inlets of the indoor units are temperate at the inlets of the respective indoor heat exchangers (based on the cooling operation).
  • After the temperatures at the inlets of the respective indoor units are measured, as shown in A of Figure 3, the first motor-operated valve 71 is closed, while the other motor-operated valves 72, 73 and 74 remain open by an unchanged amount (90 and 92). After a predetermined period of time, the temperatures at the inlets of the indoor units are measured again (94). Preferably, the predetermined period of time is set so that a change in temperature, resulting from the closing of the first motor-operated valve 25, is apparent.
  • Subsequently, the differences between temperatures at the inlets of the indoor units before closing the first motor-operated valve 71 and temperatures at the inlets of the indoor units after closing the first motor-operated valve 71 are calculated to determine whether there is an indoor unit where the temperature difference is more than a reference value (96). Such determination is made in order to prevent the temperature change at an indoor unit, where the inlet temperature has changed due to other causes than closing of the first motor-operated valve 71, from being incorrectly regarded as the indoor unit connected to the first motor-operated valve 71.
  • The reference value may be changed according to the system. During heating operation, high-temperature refrigerant is not supplied to the indoor heat exchanger as the motor-operated valve is closed and, therefore, the temperature at the inlet of the indoor unit gradually decreases. During cooling operation, low-temperature refrigerant is not supplied to the indoor heat exchanger as the motor-operated valve is closed and, therefore, the temperature at the inlet of the indoor unit gradually increases. Consequently, determination of whether the temperature at the inlet of the indoor unit has decreased more than the reference value, when the motor-operated valve is closed, is made when performing the pipe connection determination operation during heating operation, and determination as to whether the temperature at the inlet of the indoor unit has been increased more than the reference value as the motor-operated valve is closed is made when performing a pipe connection searching operation during the cooling operation.
  • If it is determined in Operation 96 that there are no indoor units where the inlet temperatures before closing and after the first motor-operated valve 71 differ by more than the reference value, it is determined that the pipe connection between the first motor-operated valve 71 and the corresponding indoor unit is abnormal and, therefore, abnormal pipe connection is displayed on the display part 19 (106). When it is determined in Operation 96 that there is an indoor unit where the difference between temperatures at the inlet of the indoor unit before and after closing the first motor-operated valve 71 is more than the reference value, on the other hand, it is determined whether the temperature at the inlet of the indoor unit is the highest or lowest among the temperatures at the inlets of all the indoor units (it is determined whether the temperature at the inlet of the indoor unit is the lowest among the temperatures at the inlets of all the indoor units in the heating operation, and it is determined whether the temperature at the inlet of the indoor unit is the highest among the temperatures at the inlets of all the indoor units in the cooling operation) (98).
  • If the condition in Operation 98 is satisfied, it is determined that the indoor unit is connected to the first motor-operated valve 71 (100). If the condition in Operation 98 is not satisfied, Operation 106 is performed.
  • Subsequently, it is determined whether the pipe connection determining operation for all the motor-operated valves 71, 72, 73, 74 has been completed (102). If it is determined that the pipe connection determining operation of all the motor-operated valves 71, 72, 73, 74 has been completed, Operation 104 is performed to successively close the second to fourth motor-operated valves and carry out the pipe connection searching operation, as shown in B, C and D of Figure 3.
  • As apparent from the above description, the operation mode of the system is properly set depending on outdoor temperature when performing the pipe connection searching operation. Consequently, the present invention has the effect of preventing the pipe connection searching operation from being performed in improper operation modes, and therefore, preventing the system from being damaged.

Claims (9)

  1. A method of determining the refrigerant conduit connections between indoor units (30, 40, 50, 60) and control valves (71, 72, 73, 74) in a multi air conditioner system comprising an outdoor unit (10), a plurality of indoor units (30, 40, 50, 60), a plurality of refrigerant paths between the indoor units (30, 40, 50, 60) to the outdoor unit (10) and refrigerant control valves (71, 72, 73, 74) in respective ones of said refrigerant paths, the method comprising:
    measuring an outdoor temperature at the outdoor unit (10);
    closing only one of the said refrigerant control valves (71, 72, 73, 74) present in the system whilst keeping the other ones of the said refrigerant control valves (71,72,73,74) open by an unchanged amount;
    operating the air conditioner system;
    determining the indoor unit (30, 40, 50, 60) controlled by the closed refrigerant control valve (71, 72, 73, 74) by detecting a change in temperature at an indoor unit (30, 40, 50, 60) between before the closing of the closed refrigerant control valve (71, 72, 73, 74) and a predetermined time after the closing of the closed refrigerant control valve (71, 72, 73, 74), and by comparing said change in temperature to a reference value (96); and
    selecting heating or cooling for said operation of the air conditioner system in dependence of the outdoor temperature at the outdoor unit (10), wherein cooling is performed when said outdoor temperature is higher than or equal to a reference temperature but otherwise heating is performed.
  2. A method of determining refrigerant conduit connections comprising a method according to claim 1 repeated for all or all but one of said refrigerant control valves (71, 72, 73, 74).
  3. The method of claim 1 further comprising:
    measuring temperature change patterns of the respective indoor units; and
    determining which indoor unit shows the temperature change patterns related to the closed refrigerant control valve to search the indoor unit connected to the refrigerant control valve.
  4. The method according to claim 3, wherein the indoor unit showing the temperature change patterns related to the closed refrigerant control valve is the indoor unit whose temperature is changed more than a reference value by closing the refrigerant control valve.
  5. The method according to claim 4, wherein the indoor unit showing the temperature change patterns related to the closed refrigerant control valve is the indoor unit whose temperature is changed more than the reference value, is the lowest among the indoor units in the heating operation, and is the highest among the indoor units in the cooling operation.
  6. The method according to claim 1, wherein the method is repetitively performed while successively closing the refrigerant control valves until the whole inspection is completed.
  7. The method according to any one of claims 1 and 3 to 6, wherein it is determined that connection between the refrigerant control valve and the indoor unit is abnormal when there is no indoor unit whose difference in temperature is more than a reference value.
  8. The method according to claim 7, wherein the refrigerant control valve is displayed on a display part when it is determined that the connection between the refrigerant control valve and the indoor unit is abnormal.
  9. A multi air conditioner system comprising:
    a plurality of indoor units (30, 40, 50, 60) connected to an outdoor unit (10);
    a plurality of refrigerant pipes connected between the outdoor unit (10) and the respective indoor units (30, 40, 50, 60);
    an outdoor temperature sensor (16) mounted at the outdoor unit (10) and configured to measure an outdoor temperature;
    a plurality of refrigerant control valves (71, 72, 73, 74) mounted on the respective refrigerant pipes; and
    a controller (18) configured to:
    control the outdoor temperature sensor (16) to measure the outdoor temperature at the outdoor unit (10);
    close only one of the said refrigerant control valves (71, 72, 73, 74) present in the system whilst keeping the other ones of the said refrigerant control valves (71,72,73,74) open by an unchanged amount;
    operate the air conditioner system;
    determine the indoor unit (30, 40, 50, 60) controlled by the closed refrigerant control valve (71, 72, 73, 74) by detecting a change in temperature at an indoor unit (30, 40, 50, 60) between before the closing of the closed refrigerant control valve (71, 72, 73, 74) and a predetermined time after the closing of the closed refrigerant control valve (71, 72, 73, 74), and by comparing said change in temperature to a reference value (96); and
    the controller (18) further being configured to select heating or cooling for said operation of the air conditioner system in dependence of the outdoor temperature at the outdoor unit (10), wherein cooling is performed when said outdoor temperature is higher than or equal to a reference temperature but otherwise heating is performed.
EP05103945.1A 2004-10-02 2005-05-11 Method of determining the configuration of an air conditioning system Active EP1643193B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040078565A KR101152936B1 (en) 2004-10-02 2004-10-02 A multi air conditioner system and a pipe connection searching method of the multi air conditioner system

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100861598B1 (en) * 2007-03-16 2008-10-07 엘지전자 주식회사 method for searching pipes in the airconditioner
US9212825B2 (en) * 2008-04-30 2015-12-15 Mitsubishi Electric Corporation Air conditioner
CN105650770A (en) * 2016-01-28 2016-06-08 芜湖美智空调设备有限公司 Multi-split system and error correction control method thereof
KR102455076B1 (en) * 2016-02-12 2022-10-14 엘지전자 주식회사 Apparatus and method for automatically searching of pipes of air conditioner
KR102463796B1 (en) * 2016-02-16 2022-11-07 엘지전자 주식회사 Apparatus and method for manually setting of pipes of air conditioner
CN106403183B (en) * 2016-09-21 2019-04-19 广东美的暖通设备有限公司 Multi-line system and its control method
KR102582538B1 (en) * 2019-05-17 2023-09-26 엘지전자 주식회사 Air conditioning apparatus and method for searching pipes of air conditioning apparatus
JP7032672B2 (en) * 2020-06-11 2022-03-09 ダイキン工業株式会社 Refrigerant circuit equipment evaluation system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3476899B2 (en) * 1994-04-12 2003-12-10 東芝キヤリア株式会社 Air conditioner
TW299392B (en) * 1994-04-19 1997-03-01 Sanyo Electric Co
JPH07305879A (en) * 1994-05-10 1995-11-21 Daikin Ind Ltd Detecting method of erroneous wiring of multi-type air conditioner
JP3492050B2 (en) * 1995-10-17 2004-02-03 三菱重工業株式会社 Trial operation method of multi-type air conditioner
JPH1082565A (en) * 1996-09-09 1998-03-31 Fujitsu General Ltd Multi-chamber type air conditioner
KR100220726B1 (en) * 1997-02-11 1999-09-15 윤종용 Multi-airconditioner
KR100318680B1 (en) * 1998-04-20 2002-08-09 삼성전자 주식회사 Air-conditioning and combined air conditioning
JP3645784B2 (en) * 2000-04-03 2005-05-11 シャープ株式会社 Multi-room air conditioner
JP4032634B2 (en) * 2000-11-13 2008-01-16 ダイキン工業株式会社 Air conditioner
JP2003028530A (en) * 2001-07-19 2003-01-29 Fujitsu General Ltd Air conditioner
JP3864956B2 (en) * 2002-03-29 2007-01-10 ダイキン工業株式会社 Air conditioner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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KR101152936B1 (en) 2012-06-08
CN100373102C (en) 2008-03-05
EP1643193A3 (en) 2011-08-17
EP1643193A2 (en) 2006-04-05
CN1755260A (en) 2006-04-05
KR20060029565A (en) 2006-04-06

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