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KR100688171B1 - Multiple air conditioner and refrigerant withdrawing method - Google Patents

Multiple air conditioner and refrigerant withdrawing method Download PDF

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Publication number
KR100688171B1
KR100688171B1 KR1020040115321A KR20040115321A KR100688171B1 KR 100688171 B1 KR100688171 B1 KR 100688171B1 KR 1020040115321 A KR1020040115321 A KR 1020040115321A KR 20040115321 A KR20040115321 A KR 20040115321A KR 100688171 B1 KR100688171 B1 KR 100688171B1
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South Korea
Prior art keywords
refrigerant
outdoor unit
pipe
outdoor
compressor
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KR1020040115321A
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Korean (ko)
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KR20060075942A (en
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윤석호
하도용
윤필현
정호종
박영민
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엘지전자 주식회사
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Priority to KR1020040115321A priority Critical patent/KR100688171B1/en
Priority to US11/318,562 priority patent/US20060162353A1/en
Priority to CNA2005100488088A priority patent/CN1796883A/en
Priority to EP05258097A priority patent/EP1677055A1/en
Publication of KR20060075942A publication Critical patent/KR20060075942A/en
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Publication of KR100688171B1 publication Critical patent/KR100688171B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/007—Compression machines, plants or systems with reversible cycle not otherwise provided for three 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
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0252—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units with bypasses
    • 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
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • 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
    • F25B2500/06—Damage

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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)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

본 발명에 따른 냉난방 동시형 멀티 공기조화기는 복수개의 실외기사이에 냉매회수수단이 구비됨으로써, 상기 복수개의 실외기 중 고장난 실외기의 압축기를 교체시 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수한 후, 다른 실외기가 고장난 실외기를 대신하여 정상 운전될 수 있기 때문에. 냉난방 가동 중단없이 압축기 교체 또는 실외기의 수리가 가능한 이점이 있다. In the air-conditioning simultaneous multi-air conditioner according to the present invention, a refrigerant recovery means is provided between a plurality of outdoor units, so that when the compressor of the failed outdoor unit is replaced among the plurality of outdoor units, the refrigerant inside the failed outdoor unit is recovered to another outdoor unit, and then another Because the outdoor unit can be operated normally in place of the failed outdoor unit. It is possible to replace the compressor or repair the outdoor unit without stopping air conditioning.

공기조화기, 멀티, 냉난방 동시, 압축기 교체, 냉매 회수수단Air Conditioner, Multi, Air Conditioning, Compressor Replacement, Refrigerant Recovery Means

Description

냉난방 동시형 멀티 공기조화기 및 냉매 회수방법 {Multiple air conditioner and refrigerant withdrawing method} Multiple air conditioner and refrigerant withdrawing method             

도 1은 본 발명에 따른 냉난방 동시형 멀티 공기조화기가 개략적으로 도시된 구성도,1 is a schematic view showing a schematic heating and cooling simultaneous multi air conditioner according to the present invention;

도 2는 본 발명에 따른 제 1실외기의 고장시 냉매회수상태가 도시된 작동상태도,2 is an operating state diagram showing a refrigerant recovery state when a failure of the first outdoor unit according to the present invention;

도 3은 냉난방 동시형 멀티 공기조화기의 냉매회수방법이 도시된 순서도. Figure 3 is a flow chart illustrating a refrigerant recovery method of the air-conditioning simultaneous multi air conditioner.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

A: 실외기 B: 분배기A: outdoor unit B: distributor

C: 실내기 51~53: 제 1~3실내기C: indoor unit 51-53: 1st-3rd indoor

54~56: 제1~3압축기 54a~56a: 제1~3압축기 흡입배관54 to 56: first to third compressors 54a to 56a: first to third compressor suction pipes

54b~56b: 제1~3압축기 토출배관 54c~56c: 제1~3바이패스배관54b to 56b: 1 to 3 compressor discharge pipes 54c to 56c: 1 to 3 bypass pipes

57~59: 제1~3사방밸브 60~62: 제1~3실외 열교환기57 to 59: 1 to 3 4-way valve 60 to 62: 1 to 3 outdoor heat exchanger

60a~62a: 제1~3실외열교환기 토출배관60a to 62a: 1st to 3rd outdoor heat exchanger discharge piping

63~65: 제1~3공용 어큐뮬레이터63 ~ 65: 1st-3rd common accumulator

71~76: 제1~6실내기 77: 실내 열교환기71 ~ 76: Indoor room 1 ~ 6 77: Indoor heat exchanger

78: 전자팽창밸브 80: 고압냉매배관78: electromagnetic expansion valve 80: high pressure refrigerant piping

81~86: 제1~6고압냉매배관 81a~86a: 제1~6고압밸브81 to 86: 1 to 6 high pressure refrigerant piping 81a to 86a: 1 to 6 high pressure valve

90: 저압냉매배관 91~96: 제1~6저압냉매배관 90: low pressure refrigerant piping 91 ~ 96: 1 ~ 6 low pressure refrigerant piping

91a~96a: 제1~6저압밸브 100: 액상냉매배관91a to 96a: 1 to 6 low pressure valve 100: liquid refrigerant piping

101~106: 제1~6액상냉매배관 111~119: 제1~9서비스밸브101 ~ 106: 1 ~ 6 liquid refrigerant piping 111 ~ 119: 1 ~ 9 service valve

121~123: 제1~3냉매회수배관 121a~123a: 제1~3개폐밸브121 to 123: 1 to 3 refrigerant recovery piping 121a to 123a: 1 to 3 opening and closing valve

본 발명은 냉난방 동시형 멀티 공기조화기에 관한 것으로서, 특히 복수개의 실외기 중에서 고장난 실외기 내부의 냉매를 다른 실외기로 회수할 수 있도록 구성되어, 다른 실외기가 고장난 실외기를 대신하여 정상 운전될 수 있기 때문에 냉난방 가동 없이 압축기 교체 또는 실외기 수리가 가능한 냉난방 동시형 멀티공기조화기에 관한 것이다.The present invention relates to a simultaneous air-conditioning multi-air conditioner, and is particularly configured to recover the refrigerant inside the malfunctioning outdoor unit among the plurality of outdoor units to another outdoor unit, the cooling and heating operation because the other outdoor unit can be operated normally in place of the failed outdoor unit The present invention relates to a cooling and heating simultaneous multi-air conditioner capable of replacing a compressor or repairing an outdoor unit.

일반적으로 공기조화기는 보다 쾌적한 실내 환경을 조성하기 위하여 실내를 냉방 또는 난방시키는 장치로서, 실내 공기를 흡입한 후 가열 또는 냉각시켜 실내로 토출한다.In general, an air conditioner is a device that cools or heats a room in order to create a more comfortable indoor environment. The air conditioner sucks indoor air and heats or cools it to discharge the room.

최근에는 실내기의 운전 대수에 따른 냉방 또는 난방부하에 효과적으로 대응할 수 있도록 복수개의 압축기를 구비하거나 복수개의 실외기를 서로 병렬로 연결하는 멀티 공기조화기가 사용되고 있다. Recently, a multi-air conditioner having a plurality of compressors or connecting a plurality of outdoor units in parallel to each other in order to effectively cope with cooling or heating loads according to the operation number of the indoor unit has been used.

종래 기술에 따른 멀티 공기조화기는 복수개의 실외기와, 복수개의 실내기와, 상기 복수개의 실외기와 실내기를 연결하는 냉매배관을 포함하여 구성된다. The multi-air conditioner according to the prior art includes a plurality of outdoor units, a plurality of indoor units, and a refrigerant pipe connecting the plurality of outdoor units and the indoor units.

상기 복수개의 실외기 각각에는 저온 저압의 기체상태의 냉매를 고온 고압으로 압축시키는 압축기와, 순환되는 냉매를 실외 공기와 열교환시키는 실외 열교환기와, 냉방 또는 난방 작동에 따라 냉매 흐름을 절환시키는 사방밸브가 설치된다.Each of the plurality of outdoor units is provided with a compressor for compressing a low temperature low pressure gaseous refrigerant to high temperature and high pressure, an outdoor heat exchanger for exchanging circulated refrigerant with outdoor air, and a four-way valve for switching refrigerant flow according to cooling or heating operation. do.

상기 복수개의 실내기 각각에는 팽창기구와, 순환되는 냉매를 실내 공기와 열교환시키는 실내 열교환기가 각각 설치된다.Each of the plurality of indoor units is provided with an expansion mechanism and an indoor heat exchanger for heat-exchanging refrigerant circulated with indoor air.

상기와 같이 구성된 종래 기술에 따른 멀티 공기조화기는 냉방 운전시는 상기 압축기에서 압축된 냉매가 상기 사방밸브에 의해 상기 실외 열교환기로 보내지고, 상기 실외 열교환기를 통과하는 냉매는 주변공기와의 열교환으로 응축된 후, 상기 팽창기구로 보내진다. In the multi-air conditioner according to the related art, the refrigerant compressed in the compressor is sent to the outdoor heat exchanger by the four-way valve during the cooling operation, and the refrigerant passing through the outdoor heat exchanger is condensed by heat exchange with ambient air. After that, it is sent to the expansion mechanism.

상기 팽창기구에서 팽창된 냉매는 상기 실내 열교환기로 유입되어, 실내 공기의 열을 흡수하면서 증발되어, 실내를 냉방시키게 된다.The refrigerant expanded in the expansion mechanism flows into the indoor heat exchanger and evaporates while absorbing heat of indoor air, thereby cooling the room.

한편, 난방 운전시에는 상기 사방밸브에서 유로가 절환되어, 상기 압축기에서 토출된 냉매는 상기 사방밸브, 실내 열교환기, 팽창기구, 실외 열교환기를 차례로 통과하면서, 실내를 난방시키게 된다. On the other hand, during the heating operation, the flow path is switched in the four-way valve, and the refrigerant discharged from the compressor heats the room while sequentially passing through the four-way valve, the indoor heat exchanger, the expansion mechanism, and the outdoor heat exchanger.

그러나, 종래 기술에 따른 멀티 공기조화기는 상기 복수개의 실외기에 각각 설치된 압축기 중 어느 하나의 압축기가 고장이 발생되면, 새로운 압축기로 교체하기 위해서, 상기 멀티 공기조화기 내부를 순환하고 있는 모든 냉매를 외부로 방출시킨 후 고장난 압축기를 교체한 후, 진공 작업을 하고 냉매를 다시 충진한 후에야 상기 멀티 공기조화기를 재가동시킬 수 있기 때문에, 고장난 압축기를 교체하기 위해서는 모든 냉난방 가동이 중단되어야 하는 문제점이 있을 뿐만 아니라, 교체 시간 및 비용이 많이 드는 문제점이 있다. However, in the multi-air conditioner according to the prior art, if any one of the compressors installed in each of the plurality of outdoor units fails, in order to replace with a new compressor, all the refrigerant circulating inside the multi-air conditioner is externally supplied. Since the multi-air conditioner can only be restarted after vacuuming and refilling the refrigerant after releasing the damaged compressor, it is not only a problem that all air-conditioning operations must be stopped to replace the failed compressor. There is a problem, replacement time and costly.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 압축기의 고장시 냉난방 운전을 중단하지 않고 압축기의 교체작업이 가능함으로써, 사용편의성이 향상되고 비용이 절감될 수 있는 냉난방 동시형 멀티 공기조화기를 제공하는데 그 목적이 있다.
The present invention has been made to solve the above problems of the prior art, by replacing the compressor without interrupting the heating and cooling operation in the event of a failure of the compressor, it is possible to improve the ease of use and cost reduction simultaneous simultaneous multi The purpose is to provide an air conditioner.

상기한 과제를 해결하기 위한 본 발명에 따른 냉난방 동시형 멀티 공기조화기는 압축기와, 사방밸브와, 실외 열교환기가 포함된 복수개의 실외기와, 실내 열교환기와 전자팽창밸브가 포함된 복수개의 실내기와, 상기 실외기와 실내기 사이에 구비되어 냉방, 난방, 냉난방 동시 운전조건에 따라 상기 복수개의 실내기에 선택적으로 냉매를 안내하는 분배기와, 상기 복수개의 실외기사이에 구비되어, 상기 복 수개의 실외기 중 고장난 실외기의 압축기를 교체시 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수하는 냉매회수수단을 포함하여 구성된 것을 특징으로 한다.The air-conditioning simultaneous multi-air conditioner according to the present invention for solving the above problems is a compressor, a four-way valve, a plurality of outdoor units including an outdoor heat exchanger, a plurality of indoor units including an indoor heat exchanger and an electronic expansion valve, A distributor provided between the outdoor unit and the indoor unit for selectively guiding the refrigerant to the plurality of indoor units according to cooling, heating, and heating and simultaneous operating conditions, and provided between the plurality of outdoor units, and the compressor of the outdoor unit that has failed among the plurality of outdoor units. It is characterized in that it comprises a refrigerant recovery means for recovering the refrigerant inside the broken outdoor unit to another outdoor unit when replacing.

본 발명에 따른 냉난방 동시형 멀티 공기조화기의 냉매회수방법은 복수개의 실외기 중 고장난 실외기 발생시, 상기 고장난 실외기에 설치된 서비스밸브를 모두 닫아서 실내기로의 냉매 유동을 차단하는 제 1단계와, 상기 고장난 실외기의 냉매회수배관에 설치된 개폐밸브를 여는 제 2단계와, 상기 다른 실외기의 압축기를 펌프 다운 운전시켜, 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수시키는 제 3단계와, 상기 고장난 실외기의 냉매가 모두 회수되면, 상기 개폐밸브를 닫는 제 4단계와, 상기 고장난 실외기의 압축기를 교체하고, 다른 실외기는 정상 운전시키는 제 5단계를 포함하여 구성된 것을 특징으로 한다.Refrigerant recovery method of the air-conditioning simultaneous multi-air conditioner according to the present invention is a first step of blocking the flow of the refrigerant to the indoor unit by closing all the service valve installed in the failed outdoor unit, when the failure of the outdoor unit of the plurality of outdoor units, and the failed outdoor unit The second step of opening the on-off valve installed in the refrigerant recovery pipe of the pump, the third step of pumping down the compressor of the other outdoor unit to recover the refrigerant inside the failed outdoor unit to another outdoor unit, and the refrigerant of the failed outdoor unit. If it is recovered, it comprises a fourth step of closing the on-off valve, and a fifth step of replacing the compressor of the faulty outdoor unit, and the other outdoor unit to operate normally.

이하, 본 발명의 실시 예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 냉난방 동시형 멀티 공기조화기가 개략적으로 도시된 구성도이고, 도 2는 본 발명에 따른 제 1실외기의 고장시 냉매회수상태가 도시된 작동상태도이고, 도 3은 냉난방 동시형 멀티 공기조화기의 냉매회수방법이 도시된 순서도이다. 1 is a block diagram schematically showing a cooling and heating simultaneous multi-air conditioner according to the present invention, Figure 2 is an operating state diagram showing the state of refrigerant recovery in the failure of the first outdoor unit according to the present invention, Figure 3 is a simultaneous heating and cooling Is a flow chart showing a refrigerant recovery method of a multi-type air conditioner.

본 발명에 따른 냉난방 동시형 멀티 공기조화기는 도 1에 도시된 바와 같이, 복수개의 실외기(A)와, 복수개의 실내기(C)와, 상기 복수개의 실외기(A)와 실내기(C) 사이에 구비되어 냉방, 난방, 냉난방 동시 운전조건에 따라 상기 복수개 의 실내기(C)에 선택적으로 냉매를 안내하는 분배기(B)와, 상기 복수개의 실외기(A) 중 고장난 실외기의 압축기를 교체시 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수하는 냉매회수수단을 포함하여 구성된다.As shown in FIG. 1, the air-conditioning simultaneous multi air conditioner according to the present invention includes a plurality of outdoor units A, a plurality of indoor units C, and a plurality of outdoor units A and indoor units C. And a distributor (B) for selectively guiding refrigerant to the plurality of indoor units (C) according to simultaneous cooling, heating, and heating and cooling operation conditions, and the failed outdoor unit when replacing the compressor of the failed outdoor unit among the plurality of outdoor units (A). And refrigerant recovery means for recovering the refrigerant to other outdoor units.

여기서, 상기 복수개의 실외기(A)는 3개의 제 1,2,3실외기(51)(52)(53)로 구성된 것으로 한정하여 설명하는 바, 상기 제 1,2,3실외기(51)(52)(53)에는 각각 제 1,2,3압축기(54)(55)(56)와, 제 1,2,3사방밸브(57)(58)(59)와, 제 1,2,3실외 열교환기(60)(61)(62)가 설치된다. Here, the plurality of outdoor units (A) is described as limited to the three first, 1,2,3 outdoor units (51, 52, 53), the first, second, third outdoor unit (51) (52) 53, the first 1,2,3 compressors 54, 55, 56, the first, second, third four-way valves 57, 58, 59, and the first, second, third outdoor Heat exchangers 60, 61 and 62 are installed.

상기 제 1,2,3압축기(54)(55)(56)는 각각 2개씩 구비되어, 제 1,2,3공용 어큐뮬레이터(63)(64)(65)에 의해 서로 연결된다. The first, second, and third compressors 54, 55, 56 are provided two, respectively, and are connected to each other by the first, second, and third common accumulators 63, 64, 65.

그리고, 상기 복수개의 실내기(B)는 제 1~6실내기(71~76)로 구성된 것으로 한정하여 설명하는 바, 상기 제 1~6실내기(71~76)에는 각각 실내 열교환기(77)와 전자팽창밸브(78)가 설치된다. In addition, the plurality of indoor units B are limited to the first to sixth indoor units 71 to 76, and the first to sixth indoors 71 to 76 may include indoor heat exchangers 77 and electronics, respectively. Expansion valve 78 is installed.

한편, 상기 제 1,2,3압축기(54)(55)(56)는 각각 일측에 상기 제 1~6실내기(71~76)로부터 냉매가 흡입되는 제 1,2,3압축기 흡입배관(54a)(55a)(56a)이 연결되고, 각각 타측에는 상기 제 1,2,3압축기(54)(55)(56)에서 토출된 냉매를 상기 제 1,2,3사방밸브(57)(58)(59)로 안내하는 제 1,2,3압축기 토출배관(54b)(55b)(56b)이 연결되고, 상기 제 1,2,3압축기 토출배관(54b)(55b)(56b)에는 상기 제 1,2,3실외 열교환기(60)(61)(62)를 거치지 않도록 바이패스시키는 제 1,2,3바이패스배관(54c)(55c)(56c)이 각각 연결된다. On the other hand, the first, second and third compressors 54, 55, 56 are first, second, and third compressor suction pipes 54a in which refrigerant is sucked from the first to sixth chambers 71 to 76 on one side thereof, respectively. 55a and 56a are connected to each other, and the refrigerant discharged from the first, second and third compressors 54, 55 and 56 is connected to the first, second and third four-way valves 57 and 58, respectively. The first, second and third compressor discharge pipes 54b, 55b and 56b, which are guided to the 59, are connected to the first, second and third compressor discharge pipes 54b, 55b and 56b. First, second and third bypass pipes 54c, 55c and 56c which bypass the first, second and third outdoor heat exchangers 60, 61 and 62 are connected to each other.

그리고, 상기 제 1,2,3실외 열교환기(60)(61)(62)의 토출부측에는 상기 제 1,2,3실외 열교환기(60)(61)(62)로부터 나온 액상 냉매를 안내하는 제 1,2,3실외열교환기 토출배관(60a)(61a)(62a)이 각각 연결된다.The liquid refrigerant from the first, second and third outdoor heat exchangers 60, 61, 62 is guided to the discharge side of the first, second, third outdoor heat exchangers 60, 61, 62. The first, second, and third outdoor heat exchanger discharge pipes 60a, 61a, 62a are connected to each other.

상기 제 1,2,3실외열교환기 토출배관(60a)(61a)(62a)에는 제 1,2,3실외기 전자팽창밸브(60b)(61b)(62b)가 각각 설치된다.The first, second and third outdoor heat exchanger discharge pipes 60a, 61a and 62a are provided with first, second and third outdoor air electromagnetic expansion valves 60b, 61b and 62b, respectively.

한편, 상기 분배기는 상기 제1,2,3실내기(71)(72)(73)와 연결되는 제 1분배기(B1)와, 상기 제4,5,6실내기(74)(75)(76)와 연결되는 제 2분배기(B2)로 이루어진다. Meanwhile, the distributor includes a first distributor B1 connected to the first, second and third rooms 71, 72 and 73, and the fourth, fifth and six rooms 74, 75 and 76. It consists of a second divider (B2) connected with.

상기 제 1,2분배기(B1)(B2)는 상기 제 1,2,3압축기(54)(55)(56)로부터 각각 토출된 고압상태의 기체 냉매를 난방운전되는 실내기로 안내하는 고압냉매배관(80)과, 상기 제 1~6실내기(71~76)를 통과한 냉매를 상기 실외기측으로 안내하는 저압냉매배관(90)과, 상기 제1,2,3실외열교환기(60)(61)(62)로부터 나온 액상 냉매를 냉방운전되는 실내기로 안내하는 액상냉매배관(100)과, 상기 고압냉매배관(80)과 저압냉매배관(90)을 선택적으로 개폐씨키는 밸브수단을 포함하여 구성된다.The first and second distributors B1 and B2 are high-pressure refrigerant pipes guiding gas refrigerants discharged from the first, second and third compressors 54, 55 and 56 to the indoor unit that is heated. (80), a low pressure refrigerant pipe (90) for guiding the refrigerant passing through the first to sixth chambers (71 to 76) to the outdoor unit, and the first, second and third outdoor heat exchangers (60) and (61). And a liquid refrigerant pipe (100) for guiding the liquid refrigerant from (62) to the indoor unit for cooling operation, and valve means for selectively opening and closing the high pressure refrigerant pipe (80) and the low pressure refrigerant pipe (90). do.

상기 고압냉매배관(80)은 상기 제 1~6실내기(71~76)의 실내 열교환기(77)에 각각 연결되는 제 1~6고압냉매배관(81~86)으로 분지되고, 상기 저압냉매배관(90)은 상기 제 1~6실내기(71~76)의 실내 열교환기(77)에 각각 연결되도록 제 1~6저압냉매배관(91~96)으로 분지되며, 상기 액상냉매배관(100)은 상기 제 1~6실내기(71~76)의 전자팽창밸브(78)에 각각 연결되도록 제 1~6액상냉매배관(101~106)으로 분지되어 형성된다. The high pressure refrigerant pipe (80) is branched into first to sixth high pressure refrigerant pipes (81 to 86) connected to the indoor heat exchangers (77) of the first to sixth chambers (71 to 76), respectively, and the low pressure refrigerant pipes. 90 is branched into the first to sixth low pressure refrigerant pipes (91 to 96) to be connected to the indoor heat exchanger (77) of the first to sixth (71 to 76), respectively, the liquid refrigerant pipe (100) Branches are formed into first to sixth liquid refrigerant pipes 101 to 106 so as to be connected to the electromagnetic expansion valves 78 of the first to sixth chambers 71 to 76, respectively.

또한, 상기 고압냉매배관(80)은 상기 제 1,2,3바이패스배관(54c)(55c)(56c) 에 연결되도록 분지되고, 상기 저압냉매배관(90)은 상기 제 1,2,3압축기 흡입배관(54a)(55a)(56a)에 연결되도록 분지되고, 상기 액상냉매배관(100)은 상기 제 1,2,3실외열교환기 토출배관(60a)(61a)(62a)에 연결되도록 분지되어 형성된다. In addition, the high pressure refrigerant pipe 80 is branched to be connected to the first, second, third bypass pipes 54c, 55c, 56c, and the low pressure refrigerant pipe 90 is the first, second, third Branched to be connected to the compressor suction pipes 54a, 55a and 56a, and the liquid refrigerant pipe 100 is connected to the first, second and third outdoor heat exchanger discharge pipes 60a, 61a and 62a. Branched and formed.

여기서, 상기 제 1실외기(51)에서 상기 제 1바이패스배관(54c)과 고압냉매배관(80)은 제 2서비스밸브(112)에 의해 연결되고, 상기 제 1압축기 흡입배관(54a)과 저압냉매배관(90)은 제 1서비스밸브(111)에 의해 연결되며, 상기 제 1실외열교환기 토출배관(60a)과 액상냉매배관(100)은 제 3서비스밸브(113)에 의해 연결된다. Here, in the first outdoor unit 51, the first bypass pipe 54c and the high pressure refrigerant pipe 80 are connected by a second service valve 112, and the first compressor suction pipe 54a and the low pressure. The refrigerant pipe 90 is connected by the first service valve 111, and the first outdoor heat exchanger discharge pipe 60a and the liquid refrigerant pipe 100 are connected by the third service valve 113.

그리고, 상기 제 2실외기(52)에서 상기 제 2바이패스배관(55c)과 고압냉매배관(80)은 제 5서비스밸브(115)에 의해 연결되고, 상기 제 2압축기 흡입배관(55a)과 저압냉매배관(90)은 제 4서비스밸브(114)에 의해 연결되며, 상기 제 2실외열교환기 토출배관(61a)과 액상냉매배관(100)은 제 6서비스밸브(116)에 의해 연결된다. In the second outdoor unit 52, the second bypass pipe 55c and the high pressure refrigerant pipe 80 are connected by a fifth service valve 115, and the second compressor suction pipe 55a and the low pressure are connected to each other. The refrigerant pipe 90 is connected by the fourth service valve 114, and the second outdoor heat exchanger discharge pipe 61a and the liquid refrigerant pipe 100 are connected by the sixth service valve 116.

또한, 상기 제 3실외기(53)에서 상기 제 3바이패스배관(56c)과 고압냉매배관(80)은 제 8서비스밸브(118)에 의해 연결되고, 상기 제 3압축기 흡입배관(56a)과 저압냉매배관(90)은 제 7서비스밸브(117)에 의해 연결되며, 상기 제 3실외열교환기 토출배관(62a)과 액상냉매배관(100)은 제 9서비스밸브(119)에 의해 연결된다. In addition, in the third outdoor unit 53, the third bypass pipe 56c and the high pressure refrigerant pipe 80 are connected by an eighth service valve 118, and the third compressor suction pipe 56a and the low pressure. The refrigerant pipe 90 is connected by the seventh service valve 117, and the third outdoor heat exchanger discharge pipe 62a and the liquid refrigerant pipe 100 are connected by the ninth service valve 119.

상기 밸브수단은 상기 제 1~6고압냉매배관(81~86)에 각각 설치되어, 난방운전시 개방되고 냉방운전시 밀폐되는 제 1~6고압밸브(81a~86a)와, 상기 제 1~6저압냉매배관(91~96)에 각각 설치되어, 냉방운전시 개방되고 난방운전시 밀폐되는 제 1~6저압밸브(91a~96a)로 이루어진다.The valve means are respectively installed in the first to sixth high-pressure refrigerant pipe (81 to 86), the first to sixth high-pressure valve (81a to 86a) that is opened during heating operation and sealed during the cooling operation, and the first to sixth It is provided in the low pressure refrigerant pipes (91 to 96), respectively, and consists of first to sixth low pressure valves (91a to 96a) that are opened during the cooling operation and closed during the heating operation.

한편, 상기 냉매회수수단은 상기 복수개의 실외기(A) 중 고장난 실외기의 압축기에서 토출된 냉매를 다른 실외기, 즉 정상인 실내기의 압축기로 회수하도록 형성된 냉매회수배관과, 상기 냉매회수배관을 개폐시키는 개폐밸브로 구성된다.On the other hand, the refrigerant recovery means is a refrigerant recovery pipe formed to recover the refrigerant discharged from the compressor of the failure of the outdoor unit of the plurality of outdoor units (A) to the compressor of the other outdoor unit, that is, the indoor unit and the on-off valve for opening and closing the refrigerant recovery pipe It consists of.

상기 냉매회수배관은 상기 제 1실외기(51)와 제 2실외기(52) 사이를 연결하는 제 1냉매회수배관(121)과, 상기 제 2실외기(52)와 제 3실외기(53) 사이를 연결하는 제 2냉매회수배관(122)과, 상기 제 3실외기(53)와 제 1실외기(51)를 연결하는 제 3냉매회수배관(123)으로 구성된다.The refrigerant recovery pipe is connected between the first refrigerant recovery pipe 121 connecting the first outdoor unit 51 and the second outdoor unit 52 and the second outdoor unit 52 and the third outdoor unit 53. The second refrigerant recovery pipe 122 and the third refrigerant recovery pipe 123 connecting the third outdoor unit 53 and the first outdoor unit (51).

즉, 상기 제 1냉매회수배관(121)은 상기 제 1바이패스배관(54c)과 제 2압축기 흡입배관(55a)을 연결하도록 설치되고, 상기 제 2냉매회수배관(122)은 상기 제 2바이패스배관(55c)과 상기 3압축기 흡입배관(56a)을 연결하도록 설치되며, 상기 제 3냉매회수배관(123)은 상기 제 3바이패스배관(56c)과 제 1압축기 흡입배관(54a)을 연결하도록 설치된다. That is, the first refrigerant recovery pipe 121 is installed to connect the first bypass pipe 54c and the second compressor suction pipe 55a, and the second refrigerant recovery pipe 122 is connected to the second bypass. It is installed to connect the pass pipe (55c) and the three compressor suction pipe (56a), the third refrigerant recovery pipe 123 is connected to the third bypass pipe (56c) and the first compressor suction pipe (54a). To be installed.

상기 개폐밸브는 상기 제 1냉매회수배관(121)에 장착된 제 1개폐밸브(121a)와, 상기 제 2냉매회수배관(122)에 장착된 제 2개폐밸브(122a)와, 상기 제 3냉매회수배관(123)에 장착된 제 3개폐밸브(123a)로 이루어진다. The on-off valve includes a first open / close valve 121a mounted on the first refrigerant recovery pipe 121, a second open / close valve 122a mounted on the second refrigerant recovery pipe 122, and the third refrigerant. It consists of a third opening and closing valve (123a) mounted on the recovery pipe (123).

상기와 같이 구성된 본 발명에 따른 냉난방 동시형 멀티공기조화기의 냉매회수방법을 살펴보면 다음과 같다.Looking at the refrigerant recovery method of the air-conditioning simultaneous multi-air conditioner according to the present invention configured as described above are as follows.

먼저, 도 2 및 도 3에 도시된 바와 같이, 상기 제 1,2,3실외기(51)(52)(53) 중에서 상기 제 1실외기(51)의 제 1압축기(54)가 고장났다고 가정하면, 제 1단계에 서 상기 제 1실외기(51)에 설치된 상기 제 1,2,3서비스밸브(111)(112)(113)를 모두 닫아서, 상기 제 1실외기(51)와 실내기(C) 사이의 냉매 유동을 차단한다. (S1)First, as shown in FIGS. 2 and 3, it is assumed that the first compressor 54 of the first outdoor unit 51 is broken among the first, second and third outdoor units 51, 52, 53. In the first step, all of the first, second and third service valves 111, 112, and 113 installed in the first outdoor unit 51 are closed, so that the first outdoor unit 51 and the indoor unit C are closed. To block the refrigerant flow. (S1)

또한, 제 2실외기(52)에 설치된 상기 제 4서비스밸브(114)를 닫아서, 상기 실내기(C)로부터 상기 제 2실외기(52)로 냉매가 흡입되는 것을 차단한다. In addition, the fourth service valve 114 installed in the second outdoor unit 52 is closed to block the refrigerant from being sucked from the indoor unit C to the second outdoor unit 52.

이후, 제 2단계에서는 상기 제 1냉매회수배관(121)에 설치된 제 1개폐밸브(121a)를 열어 상기 제 1냉매회수배관(121)을 개방시킨다. (S2)Thereafter, in the second step, the first refrigerant recovery pipe 121 is opened by opening the first opening / closing valve 121a installed in the first refrigerant recovery pipe 121. (S2)

제 3단계에서는 상기 제 2실외기(52)의 제 2압축기(55)를 펌프 다운 운전시켜서, 상기 제 1실외기(51) 내부의 모든 냉매가 상기 제 2실외기(52)측으로 회수되도록 한다. (S3)In the third step, the second compressor 55 of the second outdoor unit 52 is pumped down to recover all the refrigerant in the first outdoor unit 51 to the second outdoor unit 52. (S3)

상기 제 1실외기(51) 내부의 냉매가 모두 회수되면, 제 4단계에서 상기 제 1개폐밸브(121a)를 닫아서 상기 제 1냉매회수배관(121)을 밀폐시킨다. (S4)When all of the refrigerant in the first outdoor unit 51 is recovered, the first refrigerant recovery pipe 121 is closed by closing the first opening / closing valve 121a in a fourth step. (S4)

그리고, 상기 제 4서비스 밸브(114)를 열어서, 상기 제 2실외기(52)와 실내기(C) 사이에 냉매가 유동될 수 있도록 한다. (S5)In addition, the fourth service valve 114 is opened to allow the refrigerant to flow between the second outdoor unit 52 and the indoor unit C. (S5)

이후, 제 5단계에서는 상기 제 1실외기(51)의 제 1압축기(54)를 교체하고, 고장난 상기 제 1실외기(51)를 대신하여 상기 제 2,3실외기(52)(53)를 정상 운전시킨다. (S6)Subsequently, in the fifth step, the first compressor 54 of the first outdoor unit 51 is replaced, and the second and third outdoor units 52 and 53 are normally operated in place of the failed first outdoor unit 51. Let's do it. (S6)

상기 제 1실외기(51)의 압축기 교체작업이 끝나면, 상기 제 1실외기(51) 내부를 진공 작업시킨 후, 상기 제 1,2,3서비스밸브(111)(112)(113)를 모두 열어 상기 제 1실외기(51)를 정상 운전시킨다. After the compressor replacement operation of the first outdoor unit 51 is completed, the inside of the first outdoor unit 51 is vacuumed, and the first, second and third service valves 111, 112, and 113 are all opened. The first outdoor unit 51 is operated normally.

한편, 상기 제 2실외기(52) 또는 제 3실외기(53)가 고장난 경우도 냉매회수 방법은 마찬가지이므로 상세한 설명은 생략한다.On the other hand, even when the second outdoor unit 52 or the third outdoor unit 53 is broken, the refrigerant recovery method is the same, so detailed description thereof will be omitted.

따라서, 복수개의 실외기(A) 중 어느 하나의 실외기가 고장나게 되더라도, 다른 실외기를 가동시켜 냉난방 운전을 수행할 수 있으므로, 냉난방 가동 중단없이 압축기 교체가 가능하게 된다. Therefore, even if one outdoor unit of the plurality of outdoor units A fails, the other outdoor unit can be operated to perform the cooling and heating operation, and thus the compressor can be replaced without interrupting the heating and cooling operation.

상기와 같이 구성되는 본 발명에 따른 냉난방 동시형 멀티 공기조화기는 복수개의 실외기사이에 냉매회수수단이 구비됨으로써, 상기 복수개의 실외기 중 고장난 실외기의 압축기를 교체시 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수한 후, 다른 실외기가 고장난 실외기를 대신하여 정상 운전될 수 있기 때문에. 냉난방 가동 중단없이 압축기 교체 또는 실외기의 수리가 가능한 이점이 있다. In the air-conditioning simultaneous multi air conditioner according to the present invention configured as described above, a refrigerant recovery means is provided between a plurality of outdoor units, and when the compressor of the failed outdoor unit is replaced among the plurality of outdoor units, the refrigerant inside the failed outdoor unit is transferred to another outdoor unit. After recovery, other outdoor units can operate normally in place of the failed outdoor unit. It is possible to replace the compressor or repair the outdoor unit without stopping air conditioning.

또한, 전체 시스템의 냉매를 모두 제거해야 할 필요가 없기 때문에 압축기의 교체작업이 간편할 뿐만 아니라, 냉매손실이 최소화되어 비용이 절감될 수 있는 이점이 있다. In addition, since it is not necessary to remove all the refrigerant of the entire system, not only the replacement of the compressor is simple, but also the cost of reducing the refrigerant loss is minimized.

Claims (7)

삭제delete 삭제delete 압축기와, 사방밸브와, 실외 열교환기가 포함된 복수개의 실외기와;A plurality of outdoor units including a compressor, a four-way valve, and an outdoor heat exchanger; 실내 열교환기와 전자팽창밸브가 포함된 복수개의 실내기와;A plurality of indoor units including an indoor heat exchanger and an electromagnetic expansion valve; 상기 실외기와 실내기 사이에 구비되어 냉방, 난방, 냉난방 동시 운전조건에 따라 상기 복수개의 실내기에 선택적으로 냉매를 안내하는 분배기와;A distributor provided between the outdoor unit and the indoor unit to selectively guide refrigerant to the plurality of indoor units according to cooling, heating, and heating and simultaneous operating conditions; 상기 복수개의 실외기사이에 구비되어, 상기 복수개의 실외기 중 고장난 실외기의 압축기를 교체시 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수하는 냉매회수수단을 포함하고,A refrigerant recovery means provided between the plurality of outdoor units and recovering the refrigerant inside the failed outdoor unit to another outdoor unit when replacing a compressor of the failed outdoor unit among the plurality of outdoor units; 상기 냉매회수수단은, 상기 복수개의 실외기 중 고장난 실외기의 압축기에서 토출된 냉매를 다른 실외기의 압축기로 회수하도록 형성된 냉매회수배관과, 상기 냉매회수배관을 개폐시키는 개폐밸브를 구비하고,The refrigerant recovery means includes a refrigerant recovery pipe configured to recover the refrigerant discharged from the failed outdoor unit compressor among the plurality of outdoor units to the compressor of the other outdoor unit, and an on / off valve for opening and closing the refrigerant recovery pipe, 상기 압축기는 일측에 상기 실내기로부터 냉매가 흡입되는 압축기 흡입배관이 연결되고, 타측에 토출된 냉매가 상기 실외 열교환기를 거치지 않도록 바이패스시키는 바이패스배관이 연결되며,The compressor is connected to the compressor suction pipe for suction of the refrigerant from the indoor unit on one side, the bypass pipe for bypassing the refrigerant discharged to the other side does not pass through the outdoor heat exchanger, 상기 냉매회수배관은 상기 고장난 실외기의 바이패스배관과 다른 실외기의 압축기 흡입배관을 연결하는 냉난방 동시형 멀티 공기조화기.The refrigerant recovery pipe is a cooling and heating simultaneous multi air conditioner for connecting the bypass pipe of the faulty outdoor unit and the compressor suction pipe of the other outdoor unit. 제 3 항에 있어서,The method of claim 3, wherein 상기 분배기는 상기 압축기로부터 토출된 고압상태의 기체 냉매를 난방운전되는 실내기로 안내하는 고압 냉매배관과, 상기 실내기를 통과한 냉매를 상기 압축기의 흡입부측으로 안내하는 저압 냉매배관과, 상기 실외 열교환기로부터 나온 액상 냉매를 냉방운전되는 실내기로 안내하는 액상 냉매배관과, 상기 고압 냉매배관과 저압냉매배관을 선택적으로 개폐시키는 밸브수단을 포함하는 냉난방 동시형 멀티 공기조화기. The distributor may include a high pressure refrigerant pipe for guiding the gas refrigerant in the high pressure state discharged from the compressor to an indoor unit for heating operation, a low pressure refrigerant pipe for guiding the refrigerant passing through the indoor unit to the suction part of the compressor, and the outdoor heat exchanger. An air conditioner and a simultaneous air conditioner comprising a liquid refrigerant pipe for guiding the liquid refrigerant from the indoor unit to be cooled and operated, and valve means for selectively opening and closing the high pressure refrigerant pipe and the low pressure refrigerant pipe. 제 4 항에 있어서,The method of claim 4, wherein 상기 실외기는 상기 실외 열교환기로부터 나온 액상 냉매를 안내하는 실외열교환기 토출배관이 더 포함되고,The outdoor unit further includes an outdoor heat exchanger discharge pipe for guiding the liquid refrigerant from the outdoor heat exchanger, 상기 압축기 흡입배관과 저압냉매배관, 상기 바이패스배관과 고압냉매배관, 상기 실외열교환기 토출배관과 액상냉매배관은 각각 서비스 밸브에 의해 연결된 냉난방 동시형 멀티 공기조화기. And the compressor suction pipe and the low pressure refrigerant pipe, the bypass pipe and the high pressure refrigerant pipe, and the outdoor heat exchanger discharge pipe and the liquid refrigerant pipe are connected to each other by a service valve. 삭제delete 복수개의 실외기 중 고장난 실외기 발생시, 상기 고장난 실외기에 설치된 서비스밸브를 모두 닫아서 실내기로의 냉매 유동을 차단하는 제 1단계와;A first step of blocking refrigerant flow to the indoor unit by closing all service valves installed in the failed outdoor unit when a faulty outdoor unit occurs among a plurality of outdoor units; 상기 고장난 실외기의 냉매회수배관에 설치된 개폐밸브를 여는 제 2단계와;A second step of opening and closing the valve installed in the refrigerant recovery pipe of the failed outdoor unit; 상기 다른 실외기의 압축기를 펌프 다운 운전시켜, 상기 고장난 실외기 내부의 냉매를 다른 실외기로 회수시키는 제 3단계와;A third step of pumping down the compressor of the other outdoor unit to recover the refrigerant inside the failed outdoor unit to another outdoor unit; 상기 고장난 실외기의 냉매가 모두 회수되면, 상기 개폐밸브를 닫는 제 4단계와;A fourth step of closing the shut-off valve when all the refrigerant of the failed outdoor unit is recovered; 상기 고장난 실외기의 압축기를 교체하고, 다른 실외기는 정상 운전시키는 제 5단계를 포함하고, Replacing the failed outdoor unit compressor, and the other outdoor unit includes a fifth step of operating normally, 상기 제 1단계는 상기 다른 실외기의 압축기 흡입배관과 분배기를 연결하는 서비스밸브를 닫는 과정을 더 포함하고,The first step further includes the step of closing the service valve for connecting the compressor suction pipe and the distributor of the other outdoor unit, 상기 제 4단계는 상기 다른 실외기의 서비스밸브를 여는 과정을 더 포함하는 냉난방 동시형 멀티 공기조화기의 냉매 회수방법.The fourth step further comprises the step of opening the service valve of the other outdoor unit refrigerant recovery method of the simultaneous heating and cooling multi air conditioner.
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