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EP2728280A1 - Klimaanlage und Steuerverfahren dafür - Google Patents

Klimaanlage und Steuerverfahren dafür Download PDF

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Publication number
EP2728280A1
EP2728280A1 EP13181511.0A EP13181511A EP2728280A1 EP 2728280 A1 EP2728280 A1 EP 2728280A1 EP 13181511 A EP13181511 A EP 13181511A EP 2728280 A1 EP2728280 A1 EP 2728280A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
leakage
indoor
valve
air conditioner
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.)
Granted
Application number
EP13181511.0A
Other languages
English (en)
French (fr)
Other versions
EP2728280B1 (de
Inventor
Jeonghun Kim
Jongtae Kim
Jinyoung Joo
Sanghun Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP2728280A1 publication Critical patent/EP2728280A1/de
Application granted granted Critical
Publication of EP2728280B1 publication Critical patent/EP2728280B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F11/30—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
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • 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
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves

Definitions

  • the present disclosure relates to an air conditioner and a control method thereof.
  • An air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion valve.
  • a refrigerant is used as a medium for operating the air conditioner.
  • the air conditioner may operate in a heating cycle or cooling cycle according to a flow direction of the refrigerant.
  • the refrigerant circulating through the air conditioner may leak from a tube due to installation errors or user's carelessness.
  • a refrigerant leakage detection unit and a control method thereof may be realized in the air conditioner.
  • a temperature difference between a heat exchanger and suctioned air is less than a preset value, it may be determined that the refrigerant leaks.
  • the leakage of the refrigerant may be directly detected by using two electrodes and an impedance measurement device that measures an impedance between the two electrodes.
  • an operation of the air conditioner may be stopped to stop the circulation of the refrigerant.
  • the air conditioner since the operation of the air conditioner is uniformly stopped even though it is determined that a refrigerant leaks due to misdetection of the refrigerant leakage detection unit, the air conditioner may be unnecessarily stopped in use.
  • Embodiments provide an air conditioner and a control method thereof.
  • an air conditioner includes: a compressor compressing an inflow refrigerant to discharge the compressed refrigerant; an outdoor heat exchanger in which outdoor air introduced into an outdoor unit and the refrigerant are heat-exchanged with each other; an indoor heat exchanger in which indoor air introduced into an indoor unit and the refrigerant are heat-exchanged with each other; valves respectively disposed in an inflow-side tube and a discharge-side tube of the indoor heat exchanger; a refrigerant leakage detection part directly or indirectly detecting leakage of the refrigerant; and a control part configured, when the leakage of the refrigerant is detected, to block the valves in consecutive order.
  • the valves may include: a first valve disposed in the inflow-side tube of the indoor heat exchanger; and a second valve disposed in the discharge-side tube of the indoor heat exchanger.
  • the control part may be configured, when the leakage of the refrigerant is detected, to block the first valve earlier than the second valve.
  • the control part may be configured, when the leakage of the refrigerant continues for a preset time (t2) after the first valve is blocked, to block the second valve.
  • the control part may be configured, when the leakage of the refrigerant does not continue for a preset time (t2) after the first valve is blocked, to open the first valve. Furthermore, the control part may be configured to maintain the second valve in an open state.
  • One of the valves may be an outdoor expansion valve or indoor expansion valve.
  • the indoor heat exchanger may be provided in plurality.
  • the air conditioner may further include a branch tube for guiding the refrigerant into each of the indoor heat exchangers.
  • the branch tube may be disposed between the outdoor heat exchanger and the indoor heat exchanger. Furthermore, one of the valves may be disposed between the branch tube and the indoor heat exchanger.
  • the air conditioner may further include a counter detecting the number (N) of indoor units in which the leakage of the refrigerant occurs.
  • the control part may be configured, when the number (N) of leakage occurrence indoor units detected by the counter exceeds a preset number (N1), to stop an operation of the outdoor unit.
  • the control part may be configured, when the number (N) of leakage occurrence indoor units exceeds the preset number (N1), to stop operations of the compressor and an outdoor unit fan.
  • an air conditioner in another embodiment, includes: a first valve disposed in a refrigerant suction-side tube of an indoor heat exchanger to selectively block a flow of a refrigerant on the basis of a cooling mode; a second valve disposed in a refrigerant discharge-side tube of the indoor heat exchanger to selectively block the flow of the refrigerant on the basis of the cooling mode; a flow switching valve switching a flow direction of the refrigerant according to an operation mode of the air conditioner; a refrigerant leakage detection part detecting a refrigerant leaking into an indoor space; and a control part successively closing the first and second valves when the leakage of the refrigerant is detected by the refrigerant leakage detection part.
  • the control part may close the first valve earlier than the first valve in a cooling mode and close the second valve earlier than the first valve in a heating mode.
  • the air conditioner may further include an indoor unit fan guiding a flow of indoor air so that the indoor air passes through the indoor heat exchanger.
  • the control part may enable the indoor unit fan to continue to operate while one valve of the first and second valves is blocked.
  • control part may stop an operation of the indoor unit fan.
  • a method of controlling an air conditioner includes: firstly detecting leakage of a refrigerant in an indoor space in which air-conditioning is performed; closing a first valve disposed in a refrigerant inflow-side tube of an indoor heat exchanger when the leakage of the refrigerant is detected in said first detecting; secondarily detecting the leakage of the refrigerant after the first valve is blocked; and closing a second valve disposed in a refrigerant discharge-side tube of the indoor heat exchanger when the leakage of the refrigerant is detected in said second detecting.
  • the closing of the valves may be performed when a time in which the leakage of the refrigerant continues exceeds a preset reference time.
  • the first valve When the leakage of the refrigerant is not detected in said second detecting, the first valve may be opened.
  • the method may determine whether an operation mode of the air conditioner is a cooling mode or a heating mode.
  • the first valve disposed in the refrigerant inflow-side tube of the indoor heat exchanger may be blocked according to the determined operation mode.
  • an operation of an indoor unit may be stopped.
  • Fig. 1 is a schematic view of an air conditioner according to an embodiment.
  • Fig. 2 is a block diagram of the air conditioner according to an embodiment.
  • Fig. 3 is a flowchart illustrating a method of controlling an air conditioner according to an embodiment.
  • Fig. 4 is a block diagram of an air conditioner according to another embodiment.
  • Fig. 5 is a flowchart illustrating a method of controlling an air conditioner according to another embodiment.
  • Fig. 1 is a schematic view of an air conditioner according to an embodiment.
  • An air conditioner 10 includes an outdoor unit 100, at least one indoor unit 200, 300, or 400, and a circulation tube 500 that enables the outdoor unit 100 and the indoor unit 200, 300, or 400 to communicate with each other.
  • the outdoor unit 100 may include a compressor 110, a flow switching valve 120, an outdoor heat exchanger 130, an outdoor expansion valve 140, and an outdoor unit fan 150. Also, the compressor 110, the flow switching valve 120, the outdoor heat exchanger 130, and the outdoor expansion valve 140 may communicate with each other by the circulation tube 500.
  • the compressor 110 compresses a refrigerant introduced through a suction-side circulation tube 500 to discharge the compressed refrigerant into a discharge-side circulation tube 500.
  • the flow switching valve 120 may switch a flow direction of a refrigerant flowing into the circulation tube 500 according to an operation mode of the air conditioner 10.
  • the flow switching valve 120 may be a four-way valve.
  • Air introduced into the outdoor unit 100 and a refrigerant passing through the outdoor heat exchanger 130 are heat-exchanged with each other in the outdoor heat exchanger 130.
  • the outdoor expansion valve 140 expands a refrigerant passing through the outdoor expansion valve 140.
  • An electrical expansion valve (EEV) may be used as the outdoor expansion valve 140.
  • a degree of openness of the outdoor expansion valve 140 may be adjustable. When the outdoor expansion valve 140 is fully opened, the circulating refrigerant may pass through the outdoor expansion valve 140 in a state where the refrigerant is not expanded.
  • the outdoor fan 150 guides a flow of outdoor air so that the outdoor air passes through the outdoor heat exchanger 130.
  • the indoor units 200, 300, and 400 may include a first indoor unit 200, a second indoor unit 300, and a third indoor unit 400.
  • the first indoor unit 200 may include an indoor tube 210, an indoor expansion valve 220, an indoor heat exchanger 230, a refrigerant leakage detection part 240, first and second valves 250 and 260 that are respectively disposed in suction and discharge sides of the indoor tube 210, and an indoor unit fan 270. Duplicated descriptions with respect to the second and third indoor units 300 and 400 will be omitted.
  • the indoor tube 210 communicates with the circulation tube 500 to guide the refrigerant circulating through the indoor unit 200.
  • the first valve 250, the indoor expansion valve 220, the indoor heat exchanger 230, and the second valve 260 may be connected to the indoor tube 210.
  • the indoor expansion valve 220 expands a refrigerant passing through the indoor expansion valve 220.
  • An EEV may be used as the indoor expansion valve 220.
  • a degree of openness of the indoor expansion valve 220 may be adjustable. When the indoor expansion valve 220 is fully opened, the circulating refrigerant may pass through the indoor expansion valve 220 in a state where the refrigerant is not expanded.
  • Air introduced into the indoor unit 200 and a refrigerant passing through the indoor heat exchanger 230 are heat-exchanged with each other in the indoor heat exchanger 230.
  • the refrigerant leakage detection part 240 detects whether a refrigerant within the indoor unit 200 leaks.
  • the refrigerant leakage detection part 240 may be disposed on a side of the indoor tube 210 or disposed inside or outside the first indoor unit 200.
  • the refrigerant leakage detection part 240 may be disposed on a tube welding portion at which a refrigerant is easily leakable.
  • the present disclosure is not limited to the position of the refrigerant leakage detection part 240.
  • the refrigerant leakage detection part 240 may be spaced apart form the first indoor unit 200 and disposed on one position in an indoor space.
  • the refrigerant leakage detection part 240 may directly or indirectly detect leakage of a refrigerant.
  • the refrigerant leakage detection part 240 may include two electrodes spaced apart from each other and an impedance measurement part measuring an impedance in a space spaced between the two electrodes.
  • a dielectric constant of air is different from that of a refrigerant.
  • an impedance value measured by the impedance measurement part may be changed.
  • the leakage of the refrigerant may be directly detected by the refrigerant leakage detection part 240 by measuring the impedance value.
  • the refrigerant leakage detection part 240 may include a first temperature sensor measuring a temperature of indoor air introduced into the indoor heat exchanger 230, a second temperature sensor measuring a temperature of the indoor heat exchanger 230, and an arithmetic part calculating a difference between the temperatures measured by the first and second temperature sensors.
  • the temperature difference value calculated by the arithmetic part is less than a preset value, it may be determined that a refrigerant is not sufficiently supplied into the indoor heat exchanger 230. In this case, the leakage of the refrigerant may be doubtable.
  • the refrigerant leakage detection part 240 may indirectly detect the leakage of the refrigerant by the above-described structure.
  • the present disclosure is not limited to the refrigerant leakage detection part 240 having the above-described structure.
  • the first and second valves 250 and 260 may selectively block a refrigerant suctioned from the circulation tube 500 into the indoor heat exchanger 230 or discharged from the indoor heat exchanger 230.
  • each of the first and second valves 250 and 260 may be a solenoid valve.
  • the first valve 250 may be disposed in a refrigerant suction-side tube of the indoor heat exchanger 230 in a cooling mode.
  • the second valve 260 may be disposed in a refrigerant discharge-side tube of the indoor heat exchanger 230 in the cooling mode.
  • the outdoor expansion valve 140 or the indoor expansion valve 220 is closed to block a refrigerant suctioned into or discharged from the indoor heat exchanger 230. In this case, it is unnecessary to additionally provide a new valve. That is, the existing outdoor expansion valve 140 or the indoor expansion valve 220 may be utilized.
  • the outdoor expansion valve 140 and the indoor expansion valve 220 may be commonly called an expansion valve.
  • the indoor unit fan 270 guides a flow of indoor air so that the indoor air passes through the indoor heat exchanger 230.
  • the circulation tube 500 may include a first branch tube 510 and a second branch tube 520. Also, the first and second branch tubes 510 and 520 may be connected to the indoor tube 210 of the first indoor unit 200 to guide a refrigerant flowing through the circulation tube 500 so that the refrigerant is introduced into or discharged from the indoor tube 210.
  • first branch tube 510 may be disposed between the outdoor heat exchanger 130 and the indoor heat exchanger 230.
  • second branch tube 520 may be disposed between the compressor 110 and the indoor heat exchanger 230.
  • each of the indoor units 200, 300, and 400 the present disclosure is not limited thereto.
  • a plurality of indoor heat exchangers may be provided in one indoor unit. That is to say, the first, second, and third indoor units 200, 300, and 400 may be disposed in the same indoor space to constitute one indoor unit.
  • Fig. 2 is a block diagram of the air conditioner according to an embodiment.
  • the air conditioner 10 may further include an indoor control part 600, a memory 610, and a timer 620.
  • the indoor control part 600 may receive predetermined information from the refrigerant leakage detection part 240, the memory 600, and the timer 620 to control operations of the first valve 250, the second valve 260, and the indoor unit fan 270.
  • the indoor control part 600 may determine an operation mode of the air conditioner 10. For example, the indoor control part 600 may determine whether the air conditioner 10 operates in a cooling or heating mode according to a switching direction of the flow switching valve 120.
  • Various information related to the operation of the air conditioner 10 may be stored in the memory 610.
  • a first reference time t1 and a second reference time t2 that are criterion of an operation of the first or second valve 250 and 260 may be stored in the memory 610.
  • the timer 620 may measure a leakage time t detected by the refrigerant leakage detection part 240.
  • Fig. 3 is a flowchart illustrating a method of controlling an air conditioner according to an embodiment.
  • a refrigerant leakage detection part 240 may detect leakage of a refrigerant firstly (S100). When the leakage of the refrigerant is detected by the refrigerant leakage detection part 240, a leakage detection time t of the refrigerant may be accumulated and measured by a timer 620. Then, it may be determined whether the leakage detection time t exceeds a first reference time t1 stored in a memory 610 (S110).
  • an operation mode of the air conditioner 10 is a cooling mode (S120).
  • a first valve 250 is blocked (S130). As the first valve 250 is blocked, a refrigerant introduced into an indoor heat exchanger 230 may be blocked.
  • an indoor unit fan 270 may continuously operate for a predetermined time. As the indoor unit fan 270 operates, indoor air introduced into a first indoor unit 200 may be heat-exchanged with the refrigerant previously introduced into the indoor heat exchanger 230. Thus, in spite of the blocking of the first valve 250, the indoor air-conditioning may be continuously performed for a predetermined time without being stopped.
  • the timer 620 accumulates and measures a time t at which the leakage of the refrigerant is detected. Then, it may be determined whether the measured detection time t exceeds the second reference time t2 (S140).
  • the second valve 260 is blocked (S150). As the second valve 260 is blocked, a refrigerant reversely flowing from a circulation tube 500 into the first indoor unit 200 may be blocked.
  • the abnormality informing unit may include a display or speaker provided in the air conditioner.
  • the display may inform an abnormal state to a user by a character, a symbol, or a picture.
  • the speaker may inform the abnormal state to the user by sound.
  • an operation of the first indoor unit 200 may be stopped (S170).
  • an operation of the indoor unit fan 270 may be also stopped.
  • the process returns to the operation S100 to detect the leakage of the refrigerant.
  • the first valve 250 is opened (S142). Then, the process returns to the operation S100 to detect the leakage of the refrigerant.
  • the second valve 260 is opened (S192). Then, the process returns to the operation S100 to detect the leakage of the refrigerant.
  • Fig. 4 is a block diagram of an air conditioner according to another embodiment.
  • an air conditioner 10 may further include a main control part 900, a main memory 910, and a leakage occurrence indoor unit number detection part 920.
  • the main control part 900 may receive predetermined information from the main memory 910, a first indoor unit control part 600, a second indoor unit control part 700, a third indoor unit control part 800, and the leakage occurrence indoor unit number detection part 920 to control operations of a compressor 110 and an outdoor unit fan 150.
  • Various information related to the operation of the air conditioner 10 may be stored in the main memory 910.
  • a reference indoor unit number N1 may be stored in the main memory 910.
  • the reference indoor unit number N1 serves as a criterion for determining whether an outdoor unit operates.
  • capacity of each of indoor heat exchangers and capacity of each of outdoor heat exchangers may be unbalanced to deteriorate thermal efficiency or cause harm on an operation of the air conditioner 10.
  • an operation of the outdoor unit may be stopped as described below.
  • the number N of leakage occurrence indoor units may be referred to as the number N of indoor units of which operations are stopped.
  • the leakage occurrence indoor unit number detection part 920 detects the number N of indoor units in which the leakage of the refrigerant is detected. For example, the leakage occurrence indoor unit number detection part 920 may detect whether each of indoor unit fans 150 operates to detect the number of indoor unit fans of which operations are stopped. Also, whether each of the first and second valves 250 and 260 is blocked may be detected to detect the number of indoor unit in which all of the first and second valves 250 and 260 are blocked. The leakage occurrence indoor unit number detection part 920 may be called a "counter 920".
  • main control part 900 the first indoor unit control part 600, the second indoor unit control part 700, and the third indoor unit control part 800 are distinguished from each other, the present disclosure is not limited thereto.
  • operations of each of the control parts may be performed by one control part.
  • the main control part 900 and each of the indoor unit control parts 600, 700, and 800 may be commonly called a "control part".
  • the memory 610 and the main memory 910 are distinguished from each other, the present disclosure is not limited thereto.
  • the memory 610 and the main memory 910 may be commonly called a "memory”.
  • Fig. 5 is a flowchart illustrating a method of controlling an air conditioner according to another embodiment.
  • a leakage occurrence indoor unit number detection part 920 detects the number N of indoor units in which leakage of a refrigerant occurs (S500). Also, it is determined whether the number N of leakage occurrence indoor units exceeds the number N1 of reference indoor units (S510).
  • the abnormality informing unit may include a display or speaker.
  • a main control part 900 stops an operation of an outdoor unit 100. Particularly, the main control part 900 may stop an operation of a compressor 110 and an outdoor unit fan 150 which are disposed in the outdoor unit 100.
  • the air conditioner and the control method thereof may prevent the operation of the air conditioner from being unnecessarily stopped due to the misdetection of the leakage detection part.
  • the leakage of the refrigerant may be detected two times to block the circulation of the refrigerant, thereby improving reliability of the leakage detection part.
  • the valve in a side of the tube having a relatively high pressure in the circulation tube may be blocked to improve efficiency of the leakage blocking.
  • the multi-type air conditioner including the plurality of indoor units
  • only an actual indoor unit in which the refrigerant leaks may be stopped in operation.
  • the operation of the outdoor unit is stopped in consideration of condensation/evaporation of each of the indoor and outdoor heat exchangers, it may prevent the air conditioner from being deteriorated in efficiency and damaged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)
EP13181511.0A 2012-11-02 2013-08-23 Klimaanlage und Steuerverfahren dafür Active EP2728280B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120123488A KR20140056965A (ko) 2012-11-02 2012-11-02 공기조화기 및 그 제어 방법

Publications (2)

Publication Number Publication Date
EP2728280A1 true EP2728280A1 (de) 2014-05-07
EP2728280B1 EP2728280B1 (de) 2018-04-25

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EP13181511.0A Active EP2728280B1 (de) 2012-11-02 2013-08-23 Klimaanlage und Steuerverfahren dafür

Country Status (4)

Country Link
US (1) US20140123685A1 (de)
EP (1) EP2728280B1 (de)
KR (1) KR20140056965A (de)
CN (1) CN103807921A (de)

Cited By (8)

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JP6974691B2 (ja) * 2017-01-16 2021-12-01 ダイキン工業株式会社 冷媒開放部を有する冷凍装置
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CN104833053B (zh) * 2015-04-30 2017-12-05 广东美的制冷设备有限公司 空调器的安全防护方法及系统
CN104807251A (zh) * 2015-05-20 2015-07-29 广东志高暖通设备股份有限公司 一种风冷热泵模块水机
EP3358278A4 (de) * 2015-09-30 2019-05-01 Daikin Industries, Ltd. Kühlvorrichtung
EP3418655A4 (de) * 2016-02-16 2019-09-11 Daikin Industries, Ltd. Kühlvorrichtung
WO2017179117A1 (ja) * 2016-04-12 2017-10-19 三菱電機株式会社 空気調和装置
EP3460360A4 (de) * 2016-05-17 2019-05-08 Mitsubishi Electric Corporation Kältekreislaufvorrichtung
US11371735B2 (en) 2017-04-25 2022-06-28 Samsung Electronics Co., Ltd. Air conditioning system and method of controlling the same
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EP3889515A4 (de) * 2019-01-02 2022-02-16 Daikin Industries, Ltd. Klimaanlage und durchflusswegschaltventil
JP7412887B2 (ja) 2019-01-02 2024-01-15 ダイキン工業株式会社 空気調和機及び流路切換弁

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EP2728280B1 (de) 2018-04-25

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