KR100964369B1 - Air conditioner's control method - Google Patents

Air conditioner's control method Download PDF

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KR100964369B1
KR100964369B1 KR1020070135492A KR20070135492A KR100964369B1 KR 100964369 B1 KR100964369 B1 KR 100964369B1 KR 1020070135492 A KR1020070135492 A KR 1020070135492A KR 20070135492 A KR20070135492 A KR 20070135492A KR 100964369 B1 KR100964369 B1 KR 100964369B1
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South Korea
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compressor
discharge temperature
air conditioner
expansion valve
suction superheat
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KR1020070135492A
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Korean (ko)
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KR20090067734A (en
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김주상
하도용
최봉수
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엘지전자 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • F24F11/62—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
    • 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
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor

Abstract

본 발명은 냉방 또는 난방의 공기 조화가 가능한 공기조화기의 제어방법에 관한 것으로서, 특히 난방 모드시 압축기 기동 후, 어큐뮬레이터 내 액 냉매량에 따라 흡입 과열도와 압축기 토출 온도 제어를 병행함으로써, 신뢰성 및 안정성이 향상될 수 있는 공기조화기의 제어방법을 제공한다.The present invention relates to a control method of an air conditioner capable of air conditioning of cooling or heating, and in particular, after starting the compressor in the heating mode, by controlling the suction superheat and the compressor discharge temperature according to the amount of liquid refrigerant in the accumulator, reliability and stability are improved. Provided is a control method of an air conditioner that can be improved.

공기조화기, 압축기, LEV, 흡입 과열도, 토출 온도 제어, 어큐뮬레이터 Air Conditioners, Compressors, LEVs, Suction Superheat, Discharge Temperature Control, Accumulators

Description

공기조화기의 제어방법{Air conditioner's control method}Air conditioner's control method

본 발명은 공기조화기 및 그 제어방법에 관한 것으로서, 특히 적어도 난방 모드시, 운전 상황에 따라 최적 제어하기 위한 공기조화기의 제어방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and a control method thereof, and more particularly, to a control method of an air conditioner for optimal control according to an operating situation, at least in a heating mode.

일반적으로 공기조화기는 압축기, 응축기, 증발기, 팽창 밸브로 이루어진 공기조화 사이클을 이용하여 상기 공기조화기가 설치된 건물 또는 방에 냉기 또는 온기를 공급하는 등 공기 조화가 이루어지게 하는 장치로서, 크게 분리형과 일체형으로 구분된다.In general, an air conditioner is an air conditioning cycle consisting of a compressor, a condenser, an evaporator, and an expansion valve, which supplies air or hot air to a building or a room where the air conditioner is installed. Separated by.

상기한 분리형과 일체형은 기능적으로는 같지만 분리형은 실내기에 실내 열교환기(증발기 혹은 응축기)를 설치하고, 실외기에 실외 열교환기(응축기 혹은 증발기)와 압축기를 설치하여 서로 분리된 두 장치를 냉매 배관으로 연결시킨 것이고, 일체형은 실내 열교환기와 압축기와 실외 열교환기와 팽창 밸브를 하나의 장치로 설치한 것이다.The separation type and the integrated type are functionally the same, but the separation type installs an indoor heat exchanger (evaporator or condenser) in an indoor unit, and an outdoor heat exchanger (condenser or evaporator) and a compressor in an outdoor unit, and separates them from each other as refrigerant piping. The one-piece unit is an indoor heat exchanger, a compressor, an outdoor heat exchanger, and an expansion valve.

상기 일체형 공기조화기로는 창에 장치를 걸어서 직접 설치하는 창문형 공기조화기와, 흡입덕트와 토출덕트를 연결하여 실내 외측에 설치하는 덕트형 공기조화기 등이 있다. 상기 분리형 공기조화기로는 직립으로 설치하는 스탠드형 공기조화기와, 벽에 걸어서 설치하는 벽걸이형 공기조화기 등이 있다. The integrated air conditioner includes a window type air conditioner installed directly by hanging a device on a window, and a duct type air conditioner connected to an intake duct and a discharge duct and installed outside the room. The separate type air conditioners include stand type air conditioners installed upright and wall-mounted air conditioners mounted on a wall.

또한 상기 공기조화기는 냉방용으로만 사용되는 냉방 전용 공기조화기와, 냉/난방 겸용으로 사용될 수 있는 히트 펌프식 공기조화기로 구분될 수 있다. In addition, the air conditioner may be classified into a cooling air conditioner that is used only for cooling, and a heat pump type air conditioner that may be used for both cooling and heating.

또한 최근에는 적어도 하나의 실외기와 복수 개의 실내기가 시리즈로 연결된 멀티형 공기조화기가 널리 사용되고 있다.Recently, a multi-type air conditioner in which at least one outdoor unit and a plurality of indoor units are connected in series has been widely used.

통상적으로 이러한 공기조화기는 압축기 기동시 팽창 밸브를 흡입 과열도 제어하여 시스템 안정화시키고, 시스템 안정화되면 팽창 밸브를 토출 과열도 제어한다.Typically, such an air conditioner controls the intake overheating of the expansion valve at the start of the compressor to stabilize the system. When the system is stabilized, the air conditioner also controls the discharge overheating of the expansion valve.

상기한 바와 같은 종래 기술에 따른 공기 조화기는, 어큐뮬레이터 내 액 냉매량, 실외 기온 등 여러 변수에 따라 최적의 운전 조건이 바뀌기 때문에 여러 변수가 고려되지 않고 동일한 제어 방법으로 제어된다면 변수가 바뀔 때마다 운전 안정화되는데 과도한 시간이 소요되고, 효율이 감소되고, 응답 지연으로 인해 신뢰성이 저하되는 문제점이 있다.The air conditioner according to the prior art as described above, because the optimum operating conditions change depending on various variables such as the amount of liquid refrigerant in the accumulator, outdoor temperature, etc., if several variables are not considered and controlled by the same control method, the operation is stabilized whenever the variables are changed. There is a problem that excessive time is required, efficiency is reduced, and reliability is degraded due to response delay.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 난방 모드시 압축기가 기동되면, 어큐뮬레이터 내 액 냉매량에 따라 흡입 과열도와 압축기 토출 온도 제어를 병행함으로써, 공기조화기가 최적의 운전 조건으로 제어되게 하는 공기조화기의 제어방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, when the compressor is started in the heating mode, by controlling the suction superheat and the compressor discharge temperature in accordance with the amount of liquid refrigerant in the accumulator, the air conditioner to the optimum operating conditions It is an object of the present invention to provide a control method of an air conditioner to be controlled.

상기한 과제를 해결하기 위해 본 발명은 난방 모드시 압축기를 기동하고 흡입 과열도가 목표 흡입 과열도에 도달되게 팽창밸브를 제어하는 기동 제어 단계와; 상기 난방 모드의 개시시부터 경과된 시간이 기설정된 기동 시간에 도달되면 실시되는 본 제어를 포함하고, 상기 본 제어는 압축기의 토출 온도와 기설정된 제1기준 온도의 합이 압축기의 목표 토출 온도 이하이면 흡입 과열도가 목표 흡입 과열도에 도달되게 상기 팽창밸브를 제어하고, 상기 압축기의 토출 온도가 상기 압축기의 목표 토출 온도와 기설정된 제2 기준 온도의 합 이상이면 상기 압축기의 토출 온도가 상기 압축기의 목표 토출 온도에 도달되게 상기 팽창밸브를 제어한다.In order to solve the above problems, the present invention includes a start control step of starting the compressor in the heating mode and controlling the expansion valve so that the suction superheat reaches the target suction superheat; The present control is performed when the time elapsed from the start of the heating mode reaches a preset start time, wherein the present control includes a sum of the discharge temperature of the compressor and the preset first reference temperature is equal to or less than the target discharge temperature of the compressor. Control the expansion valve so that the suction superheat degree reaches a target suction superheat degree, and if the discharge temperature of the compressor is equal to or more than the sum of the target discharge temperature of the compressor and a second preset reference temperature, the discharge temperature of the compressor is the compressor. The expansion valve is controlled to reach a target discharge temperature of.

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상기한 바와 같은 본 발명에 따른 공기조화기의 제어방법은 어큐뮬레이터 내 액 냉매량에 따라 공기조화기를 최적의 운전 조건으로 제어함으로써, 신속하게 안정화될 수 있어 신뢰성 및 안정성이 향상될 수 있고, 난방 효율이 향상될 수 있는 이점을 갖는다.The control method of the air conditioner according to the present invention as described above can be stabilized quickly by controlling the air conditioner to the optimum operating conditions according to the amount of liquid refrigerant in the accumulator, so that the reliability and stability can be improved, and the heating efficiency is improved. Has the advantage that it can be improved.

이하, 본 발명에 따른 공기조화기의 난방 운전시 제어 방법에 대하여 도 1을 참조하여 상세히 설명한다.Hereinafter, a control method during heating operation of an air conditioner according to the present invention will be described in detail with reference to FIG. 1.

난방 모드가 개시되면(S2), 정체되어 있던 냉매가 압축기로 압송됨에 따라 냉매가 상대적으로 압축기에 몰려 있는바, 압축기가 신속하게 기동될 수 있도록, 팽창밸브가 흡입 과열도를 기준으로 제어된다(S4). When the heating mode is started (S2), the refrigerant is relatively concentrated in the compressor as the stagnant refrigerant is fed to the compressor, so that the expansion valve is controlled based on the suction superheat so that the compressor can be started quickly ( S4).

상기 팽창밸브가 흡입 과열도를 기준으로 제어되는 것은 현재 공기조화기의 운전 상태에서 산출되는 현재 흡입 과열도가 공기조화기의 운전 상태가 안정화되는 목표 흡입 과열도에 도달토록, 팽창밸브의 개도를 제어하는 것이다. 여기서 현재 흡입 과열도는 압축기의 흡입 온도에서 증발 온도, 즉 증발기로 작용하는 실외 열교환기에서 증발 작용되는 냉매의 온도를 뺀 값이다.The expansion valve is controlled based on the suction superheat degree so that the current suction superheat degree calculated in the operation state of the current air conditioner reaches the target suction superheat degree at which the operation state of the air conditioner is stabilized. To control. Here, the current suction superheat degree is a value obtained by subtracting the evaporation temperature from the suction temperature of the compressor, that is, the temperature of the refrigerant evaporated in the outdoor heat exchanger acting as an evaporator.

상기와 같이 압축기가 기동됨과 동시에 난방 모드 개시로부터 경과된 시간이 체크된다. 상기 시간 체크 결과, 난방 모드 개시로부터 경과된 시간이 압축기의 기동 완료를 판단하기 위해 기 설정된 기동 시간에 도달하면, 압축기가 기동된 것으로 판단된다. 상기 기 설정된 기동 시간은 공기조화기의 용량, 운전 모드 등에 따라 상이해질 수 있는데, 예를 들어 대략 5분 정도로 설정될 수 있다(S6).As described above, at the same time that the compressor is started, the time elapsed from the start of the heating mode is checked. As a result of the time check, when the time elapsed from the start of the heating mode reaches a preset start time to determine the completion of the start of the compressor, it is determined that the compressor has been started. The preset start time may vary depending on the capacity of the air conditioner, the operation mode, and the like, for example, may be set to about 5 minutes (S6).

압축기가 기동 완료되고 나면, 어큐뮬레이터에 축적되어 있는 액 냉매량에 따라 공기조화기의 운전 제어 조건이 영향을 받는바, 팽창밸브는 어큐뮬레이터에 축적된 액 냉매량에 따라 제어된다.After the compressor is started, the operation control conditions of the air conditioner are affected by the amount of liquid refrigerant accumulated in the accumulator. The expansion valve is controlled according to the amount of liquid refrigerant accumulated in the accumulator.

즉, 어큐뮬레이터 내 액 냉매가 과도한지 여부에 따라 공기조화기의 제어 방법이 결정된다.That is, the control method of the air conditioner is determined depending on whether the liquid refrigerant in the accumulator is excessive.

어큐뮬레이터의 액 냉매 과도 여부는, 어큐뮬레이터 내 액 냉매가 과도하면 압축기의 토출 온도가 하강하는 바, 압축기의 토출 온도와 압축기의 목표 토출 온도를 비교함으로써 판단될 수 있다. When the accumulator liquid refrigerant is excessive, the discharge temperature of the compressor decreases when the liquid refrigerant in the accumulator is excessive, and it may be determined by comparing the discharge temperature of the compressor and the target discharge temperature of the compressor.

압축기의 토출 온도(T)가 압축기의 목표 토출 온도(Tt)보다 기 설정된 제2기준 온도 이상이면, 즉, 압축기의 토출 온도(T)가 압축기의 목표 토출 온도와 기 설정된 제2 기준 온도의 합 이상이면, 어큐뮬레이터 내 액 냉매가 과도하지 않은 것으로 판단된다. 상기 제2기준 온도 또한 공기조화기의 용량, 설치 환경 등에 따라 달라질 수 있는데, 예를 들면 대략 2℃ 내지 6℃ 중 어느 한 온로로 설정될 수 있다.(S10)If the discharge temperature T of the compressor is greater than or equal to the preset second reference temperature than the target discharge temperature Tt of the compressor, that is, the discharge temperature T of the compressor is the sum of the target discharge temperature of the compressor and the preset second reference temperature. If it is abnormal, it is determined that the liquid refrigerant in the accumulator is not excessive. The second reference temperature may also vary depending on the capacity of the air conditioner, the installation environment, and the like. For example, the second reference temperature may be set to one of about 2 ° C. to 6 ° C. (S10)

반면, 압축기의 토출 온도(T)가 압축기의 목표 토출 온도(Tt)보다 기설정된 제1기준 온도 이하가 되면, 즉, 압축기의 토출 온도(T)와 제1 기준 온도의 합이 기압축기의 목표 토출 온도 이하이면, 어큐뮬레이터 내 액 냉매가 과도한 것으로 판단된다. 상기 제1기준 온도는 공기조화기의 용량, 설치 환경 등에 따라 달라질 수 있는데, 예를 들어 대략 5℃, 즉 3℃ 내지 7℃ 중 어느 한 온도로 설정될 수 있다.(S12)On the other hand, when the discharge temperature T of the compressor is equal to or less than the predetermined first reference temperature than the target discharge temperature Tt of the compressor, that is, the sum of the discharge temperature T and the first reference temperature of the compressor is the target of the air compressor. If it is below the discharge temperature, it is determined that the liquid refrigerant in the accumulator is excessive. The first reference temperature may vary depending on the capacity of the air conditioner, the installation environment, and the like, and may be set to, for example, any one of about 5 ° C., that is, 3 ° C. to 7 ° C. (S12)

상기 판단 결과, 어큐뮬레이터 내 액 냉매가 과도하지 않은 것으로 판단되면, 팽창밸브가 토출 온도를 기준으로 제어된다. 팽창밸브가 토출 온도를 기준으로 제어되는 것은 현 시점에서 획득된 압축기의 토출 온도가 공기조화기의 운전이 안정화되기 위해 설정된 압축기 목표 토출 온도에 도달토록 팽창밸브를 제어하는 방법이다. 압축기의 토출온도는 온도 센서에 의해 센싱되는 것도 가능하고, 고압 압력 센싱부에서 센싱한 압축기의 토출 압력으로부터 온도-압력 상관관계에 따라 산출될 수도 있다. 이러한 팽창밸브가 토출 온도를 기준으로 제어되는 것은 상술한 흡입 과열도 제어보다 안정성 및 신뢰성, 응답성이 더 좋고, 제어가 더 용이하다.(S20)As a result of the determination, if it is determined that the liquid refrigerant in the accumulator is not excessive, the expansion valve is controlled based on the discharge temperature. The expansion valve is controlled based on the discharge temperature is a method of controlling the expansion valve so that the discharge temperature of the compressor obtained at this time reaches the compressor target discharge temperature set to stabilize the operation of the air conditioner. The discharge temperature of the compressor may be sensed by a temperature sensor, or may be calculated according to the temperature-pressure correlation from the discharge pressure of the compressor sensed by the high pressure pressure sensing unit. Control of the expansion valve based on the discharge temperature is better in stability, reliability and responsiveness than in the above-described suction superheat control, and is easier to control (S20).

한편, 상기 판단 결과, 어큐뮬레이터 내 액 냉매가 과도한 것으로 판단되면, 팽창밸브는 흡입 과열도를 기준으로 제어된다.On the other hand, if it is determined that the liquid refrigerant in the accumulator is excessive, the expansion valve is controlled based on the suction superheat degree.

왜냐하면, 팽창밸브가 토출 온도를 기준으로 제어되는 것은 다음과 같은 단점이 있기 때문이다. 어큐뮬레이터에 액 냉매가 가득 찬 경우에는 압축기로 유동되는 냉매 중 액 냉매가 압축기에 유입됨으로써, 압축기의 토출 온도가 하강하게 된다. 따라서, 팽창밸브가 토출 온도를 기준으로 제어되면, 압축기의 토출 온도가 상승토록 팽창 밸브가 닫혀지는데, 이미 어큐뮬레이터에 액 냉매가 가득 차 있기 때문에 압축기의 토출 온도는 상승하지 않게 되어 팽창밸브가 완전히 닫혀짐으로써(Full close), 유량 부족으로 난방 운전 공기조화기가 정상 운전되지 못한다.This is because the expansion valve is controlled based on the discharge temperature has the following disadvantages. When the accumulator is filled with liquid refrigerant, the liquid refrigerant of the refrigerant flowing to the compressor flows into the compressor, thereby lowering the discharge temperature of the compressor. Therefore, when the expansion valve is controlled based on the discharge temperature, the expansion valve is closed so that the discharge temperature of the compressor is increased. Since the accumulator is already filled with liquid refrigerant, the discharge temperature of the compressor does not rise and the expansion valve is completely closed. Full close, the heating operation air conditioner does not operate normally due to lack of flow rate.

반면, 어큐뮬레이터 내 액 냉매가 가득 찬 경우에 팽창밸브가 흡입 과열도를 기준으로 제어되면, 상기 흡입 과열도가 높아지도록 팽창밸브가 닫혀지는데, 팽창밸브가 닫혀지면 팽창밸브를 통과하는 냉매의 고저압 차이가 증대되고 냉매 유량이 감소된다. 그러면, 실외 열 교환기를 빠져나오는 냉매의 건도가 높아지게 되고, 이에 따라 어큐물레이터에 액 냉매의 축적량이 감소하게 된다. 이와 아울러, 상기 실외 열교환기를 빠져나오는 냉매의 온도가 높아지게 되고, 이에 따라 압축기의 토출 온도가 상승되지 않더라도 흡입 과열도는 올라가게 된다. 따라서, 팽창밸브가 완전히 닫혀지지는 않는다. 이때, 상기 흡입 과열도 제어에 의해 어큐뮬레이터 내 액 냉매 축적량이 충분히 감소된 후에는, 압축기의 토출 온도는 상승하게 된다.(S22)On the other hand, when the expansion valve is controlled based on the suction superheat when the liquid refrigerant in the accumulator is full, the expansion valve is closed to increase the suction superheat, and when the expansion valve is closed, the high and low pressure of the refrigerant passing through the expansion valve is closed. The difference is increased and the refrigerant flow rate is reduced. As a result, the dryness of the refrigerant exiting the outdoor heat exchanger is increased, thereby reducing the accumulation amount of the liquid refrigerant in the accumulator. In addition, the temperature of the refrigerant exiting the outdoor heat exchanger is increased, thereby increasing the suction superheat even if the discharge temperature of the compressor is not increased. Therefore, the expansion valve is not completely closed. At this time, after the accumulation amount of the liquid refrigerant in the accumulator is sufficiently reduced by the suction superheat control, the discharge temperature of the compressor is increased.

도 1은 본 발명에 따른 공기조화기의 제어방법에 따른 순서도이다.1 is a flow chart according to the control method of the air conditioner according to the present invention.

Claims (5)

난방 모드시 압축기를 기동하고 흡입 과열도가 목표 흡입 과열도에 도달되게 팽창밸브를 제어하는 기동 제어 단계와;A start control step of starting the compressor in the heating mode and controlling the expansion valve so that the suction superheat degree reaches the target suction superheat degree; 상기 난방 모드의 개시시부터 경과된 시간이 기설정된 기동 시간에 도달되면 실시되는 본 제어를 포함하고, A main control which is executed when a time elapsed since the start of the heating mode reaches a preset startup time, 상기 본 제어는 압축기의 토출 온도와 기설정된 제1기준 온도의 합이 압축기의 목표 토출 온도 이하이면 흡입 과열도가 목표 흡입 과열도에 도달되게 상기 팽창밸브를 제어하고, The control may control the expansion valve so that the suction superheat reaches the target suction superheat if the sum of the discharge temperature of the compressor and the preset first reference temperature is equal to or less than the target discharge temperature of the compressor. 상기 압축기의 토출 온도가 상기 압축기의 목표 토출 온도와 기설정된 제2 기준 온도의 합 이상이면 상기 압축기의 토출 온도가 상기 압축기의 목표 토출 온도에 도달되게 상기 팽창밸브를 제어하는 공기조화기의 제어방법.A control method of an air conditioner for controlling the expansion valve so that the discharge temperature of the compressor reaches the target discharge temperature of the compressor when the discharge temperature of the compressor is equal to or greater than the sum of the target discharge temperature of the compressor and the second preset reference temperature; . 삭제delete 삭제delete 삭제delete 삭제delete
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KR20020088642A (en) * 2001-05-18 2002-11-29 주식회사 엘지이아이 control method for air-conditioner
KR20030085235A (en) * 2002-04-29 2003-11-05 삼성전자주식회사 Multi-type air conditioner
KR20050080601A (en) * 2004-02-10 2005-08-17 엘지전자 주식회사 Controling method in the multi-airconditioner system
KR20060069552A (en) * 2004-12-17 2006-06-21 한라공조주식회사 Supercritical refrigerant system for vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020088642A (en) * 2001-05-18 2002-11-29 주식회사 엘지이아이 control method for air-conditioner
KR20030085235A (en) * 2002-04-29 2003-11-05 삼성전자주식회사 Multi-type air conditioner
KR20050080601A (en) * 2004-02-10 2005-08-17 엘지전자 주식회사 Controling method in the multi-airconditioner system
KR20060069552A (en) * 2004-12-17 2006-06-21 한라공조주식회사 Supercritical refrigerant system for vehicle

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