KR20010038760A - Multi air conditioner - Google Patents

Multi air conditioner Download PDF

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Publication number
KR20010038760A
KR20010038760A KR1019990046873A KR19990046873A KR20010038760A KR 20010038760 A KR20010038760 A KR 20010038760A KR 1019990046873 A KR1019990046873 A KR 1019990046873A KR 19990046873 A KR19990046873 A KR 19990046873A KR 20010038760 A KR20010038760 A KR 20010038760A
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South Korea
Prior art keywords
refrigerant
heat exchanger
compressor
indoor heat
air conditioner
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KR1019990046873A
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Korean (ko)
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KR100364534B1 (en
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정백영
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구자홍
엘지전자 주식회사
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Priority to KR1019990046873A priority Critical patent/KR100364534B1/en
Publication of KR20010038760A publication Critical patent/KR20010038760A/en
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Publication of KR100364534B1 publication Critical patent/KR100364534B1/en

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    • 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
    • F25B41/40—Fluid line 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—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
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0415—Refrigeration circuit bypassing means for the receiver
    • 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
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/053—Compression system with heat exchange between particular parts of the system between the storage receiver and another part of the system
    • 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
    • F25B2500/05—Cost reduction

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

PURPOSE: A multiple air conditioner is provided to reduce parts count and manufacturing cost by eliminating a bypass pipe and an electronic expansion valve mounted to the bypass pipe. CONSTITUTION: A multiple air conditioner comprises a compressor(23) for compression of the refrigerant; an outdoor heat exchanger(25) for receiving the refrigerant from the compressor and performing heat exchange operation; a plurality of indoor heat exchangers(3a-3c) installed to be communicated to the outdoor heat exchanger; a capillary tube disposed in the inlet side of the indoor heat exchanger and which reduces pressure from the refrigerant flowing from the outdoor heat exchanger and expands the refrigerant; and a liquid receiver(31) interposed between the outdoor heat exchanger and the capillary tube so as to form a refrigerant storage space. The liquid receiver accommodates a portion of the refrigerant pipe at the outlet side of the indoor heat exchanger and allows the refrigerant flowing from the indoor heat exchanger to be heat-exchanged with the refrigerant stored in the refrigerant storage space.

Description

멀티형 공기조화기{MULTI AIR CONDITIONER}Multi air conditioner {MULTI AIR CONDITIONER}

본 발명은 멀티형 공기조화기에 관한 것으로서, 보다 상세하게는, 제조비용을 절감시킬 수 있도록 한 멀티형 공기조화기에 관한 것이다.The present invention relates to a multi-type air conditioner, and more particularly, to a multi-type air conditioner to reduce the manufacturing cost.

공기조화기는 쾌적한 실내환경을 조성하기 위해 공기의 온도, 습도, 기류 및 청정도를 조절할 수 있도록 한 장치로서, 최근에는 복수의 실내유니트를 각 설치공간별로 배치하고 설치공간별로 공기의 온도 등을 조절할 수 있도록 한 멀티형 공기조화기가 개발되어 있다.The air conditioner is a device to adjust the temperature, humidity, air flow and cleanliness of the air to create a comfortable indoor environment. Recently, a plurality of indoor units can be arranged in each installation space and the air temperature can be adjusted in each installation space. A multi-type air conditioner has been developed.

도 1은 종래의 멀티형 공기조화기의 개략적인 냉동사이클 구성도이다. 도시된 바와 같이, 멀티형 공기조화기는, 적어도 하나의 실내열교환기(103a~103c) 및 실내열교환기(103a~103c)의 일측에 배치되어 실내를 향하여 송풍하는 송풍팬(105)을 갖는 복수의 실내유니트(101a~101c)와, 각 실내유니트(101a~101c)와 냉매배관에 의해 상호 연결되어 각 실내유니트(101a~101c)로부터의 냉매를 수령하여 압축하는 단일의 실외유니트(111)를 가진다.1 is a schematic configuration diagram of a refrigeration cycle of a conventional multi-type air conditioner. As shown, the multi-type air conditioner has a plurality of rooms having at least one indoor heat exchanger (103a to 103c) and a blower fan (105) disposed at one side of the indoor heat exchangers (103a to 103c) and blowing toward the interior. Units 101a to 101c, each indoor unit 101a to 101c, and a single outdoor unit 111 connected to each other by a refrigerant pipe and receiving and compressing refrigerant from each of the indoor units 101a to 101c are compressed.

실외유니트(111)는, 각 실내유니트(101a~101c)로부터의 냉매를 수령하여 압축하는 압축기(113)와, 압축기(113)에 의해 압축되어 고온고압상태의 냉매를 방열을 통하여 응축하는 실외열교환기(115)와, 실외열교환기(115)의 일측에 배치되어 실외열교환기(115)를 향해 송풍함으로써 열교환작용을 촉진시키는 냉각팬(117)을 가진다. 이들 실내열교환기(103a~103c)와, 압축기(113) 및 실외열교환기(115)는 상호 냉매가 유동할 수 있도록 냉매배관에 의해 연결되어 있다.The outdoor unit 111 is a compressor 113 for receiving and compressing refrigerant from each of the indoor units 101a to 101c, and an outdoor heat exchange that is compressed by the compressor 113 and condenses the refrigerant in a high temperature and high pressure state through heat radiation. Group 115 and a cooling fan 117 disposed on one side of the outdoor heat exchanger 115 to blow toward the outdoor heat exchanger 115 to promote heat exchange. These indoor heat exchangers (103a to 103c), the compressor 113 and the outdoor heat exchanger 115 are connected by a refrigerant pipe so that the refrigerant flows with each other.

압축기(113)의 흡입측에는 기체상태의 냉매가 흡입될 수 있도록 어큐물레이터(119)가 결합되어 있으며, 실외열교환기(115)의 토출측에는 냉매의 수용공간을 형성하는 수액기(121)가 연결되어 있다. 수액기(121)의 토출측에는 각 실내열교환기(103a~103c)로 냉매가 공급될 수 있도록 분기유로가 형성된 분기유로관(123)이 결합되어 있으며, 분기유로관(123)에 결합된 각 실내열교환기(103a~103c)의 유입측에는 실외열교환기(115)를 통과한 냉매가 감압팽창될 수 있도록 팽창밸브(125a~125c)가 각각 설치되어 있다. 각 실내열교환기(103a~103c)의 유출측 냉매배관은 다시 합류하여 어큐물레이터(119)의 흡입측 냉매배관에 연결된다.The accumulator 119 is coupled to the suction side of the compressor 113 to allow the refrigerant in the gaseous state to be sucked in, and the receiver 121 which forms a receiving space of the refrigerant is connected to the discharge side of the outdoor heat exchanger 115. It is. On the discharge side of the receiver 121, branch flow paths 123 having branch flow paths are coupled to each of the indoor heat exchangers 103a to 103c, and the respective rooms coupled to the branch flow path pipes 123 are coupled to each other. Expansion valves 125a to 125c are provided on the inflow side of the heat exchangers 103a to 103c so that the refrigerant passing through the outdoor heat exchanger 115 can expand under reduced pressure. The outlet refrigerant pipes of the respective indoor heat exchangers 103a to 103c are again joined and connected to the suction refrigerant pipe of the accumulator 119.

한편, 이러한 멀티형 공기조화기에 있어서는, 실내유니트(101a~101c)가 일부운전되는 경우와 모두 운전되는 경우에 따라 압축기(113)의 냉매 압축부하량이 달라지게 된다. 즉, 실내유니트(101a~101c)가 하나만 가동되는 경우를 예를 들어 설명하면, 압축기(113)에 의해 압축된 냉매는 실외열교환기(115)를 거쳐 응축되고 해당 팽창밸브를 통하여 해당 실내열교환기로 유입된다. 이 때, 압축기(113)에 의해 토출되는 냉매량에 비해 운전되는 실내열교환기를 통과하여 흡입측으로 유입되는 냉매량이 상대적으로 현저히 작기 때문에 압축기(113)의 흡입측의 흡입압력이 낮아지게 되어 운전효율을 저해하게 되는 문제점이 있다.On the other hand, in such a multi-type air conditioner, the amount of refrigerant compression load of the compressor 113 varies depending on the case where the indoor units 101a to 101c are partially operated and when they are all operated. That is, a case in which only one indoor unit 101a to 101c is operated will be described, for example. The refrigerant compressed by the compressor 113 is condensed through the outdoor heat exchanger 115 and transferred to the corresponding indoor heat exchanger through the expansion valve. Inflow. At this time, since the amount of refrigerant flowing through the indoor heat exchanger operated to the suction side is relatively small compared to the amount of the refrigerant discharged by the compressor 113, the suction pressure on the suction side of the compressor 113 is lowered, which hinders the operation efficiency. There is a problem.

이러한 문제점을 고려하여, 수액기(121)의 토출측과 어큐물레이터(119)의 흡입측을 연결하여 수액기(121)를 통과한 냉매의 일부를 압축기(113)의 흡입측에 제공되도록 함으로써, 압축기(113)의 흡입압력이 낮아지는 것을 방지할 수 있도록 하는 제1우회유로(127)가 마련되어 있다. 이 제1우회유로(127)에는 냉매의 갑압팽창 및 우회유로의 개도조절을 용이하게 할 수 있도록 제1전자팽창밸브(129)가 마련되어 있다.In consideration of this problem, by connecting the discharge side of the receiver 121 and the suction side of the accumulator 119 to provide a portion of the refrigerant passing through the receiver 121 to the suction side of the compressor 113, The first bypass passage 127 is provided to prevent the suction pressure of the compressor 113 from lowering. The first bypass passage 127 is provided with a first electromagnetic expansion valve 129 to facilitate the expansion of the refrigerant and the opening degree of the bypass passage.

제1우회유로(127)내로 유입된 냉매는 제1전자팽창밸브(129)를 통과하면서 교축을 받아 감압되면서 온도가 급강하되어 압축기(113)의 흡입측 온도를 낮추기 때문에 냉매가 충분히 기화되지 못하므로 액상의 냉매가 압축기(113)내로 흡입될 우려가 있다.Since the refrigerant introduced into the first bypass passage 127 passes through the first electromagnetic expansion valve 129 and receives a throttling, the pressure decreases while reducing the temperature of the compressor 113 so that the refrigerant is not sufficiently vaporized. There is a fear that the liquid refrigerant is sucked into the compressor 113.

따라서, 압축기(113)의 흡입측의 냉매온도를 보상하여 줌으로써, 액상냉매가 압축기(113)내로 흡입되는 것을 방지하기 위해 압축기(113)의 토출측과 어큐물레이터(119)의 흡입측을 상호 연통되도록 연결하는 제2우회유로(131) 및 제2우회유로(131)의 개도조절을 용이하게 할 수 있도록 제2전자팽창밸브(133)를 마련하고 있다. 이에 따라, 어큐물레이터(119)의 흡입측에는 압축기(113)에 의해 압축되어 고온고압의 기체상태의 냉매가 유입됨으로써, 과냉이 방지된다.Accordingly, by compensating for the refrigerant temperature on the suction side of the compressor 113, the discharge side of the compressor 113 and the suction side of the accumulator 119 communicate with each other to prevent the liquid refrigerant from being sucked into the compressor 113. The second electromagnetic expansion valve 133 is provided to facilitate the adjustment of the opening degree of the second bypass passage 131 and the second bypass passage 131 connected to each other. As a result, the compressor 113 is compressed to the suction side of the accumulator 119 and the refrigerant in a gaseous state having a high temperature and high pressure flows therein, thereby preventing overcooling.

그런데, 이러한 종래의 멀티형 공기조화기에 있어서는, 복수의 실내유니트중 일부만 가동될 경우를 대비하여 제1 및 제2우회유로를 형성하고, 각 우회유로에 비교적 고가품인 전자팽창밸브를 각각 설치하도록 되어 있어, 제조비용을 상승시키게 되는 문제점이 있다.By the way, in the conventional multi-type air conditioner, the first and second bypass passages are formed in the case where only a part of the plurality of indoor units are operated, and each of the bypass passages is provided with a relatively expensive electromagnetic expansion valve. There is a problem of increasing the manufacturing cost.

따라서, 본 발명의 목적은, 제조비용을 절감시킬 수 있도록 한 멀티형 공기조화기를 제공하는 것이다.Accordingly, it is an object of the present invention to provide a multi-type air conditioner capable of reducing manufacturing costs.

도 1은 종래의 멀티형 공기조화기의 개략적인 냉동사이클 구성도,1 is a schematic configuration of a refrigeration cycle of a conventional multi-type air conditioner,

도 2는 본 발명의 일 실시예에 따른 멀티형 공기조화기의 개략적인 냉동사이클 구성도이다.Figure 2 is a schematic diagram of the refrigeration cycle of the multi-type air conditioner according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1a~1c : 실내유니트 3a~3c : 실내열교환기1a ~ 1c: Indoor unit 3a ~ 3c: Indoor heat exchanger

7 : 유입분기관 9 : 유출분기관7: Inlet branch engine 9: Outlet branch engine

13a~13c, 35 : 전자팽창밸브 21 : 실외유니트13a ~ 13c, 35: electromagnetic expansion valve 21: outdoor unit

23 : 압축기 25 : 실외열교환기23 compressor 25 outdoor heat exchanger

31 : 수액기31: receiver

상기 목적은, 본 발명에 따라, 냉매를 압축하는 압축기와; 상기 압축기로부터의 냉매를 수령하여 열교환하는 실외열교환기와; 상기 실외열교환기와 상호 연통되도록 설치되는 복수의 실내열교환기와; 상기 실외열교환기와 상기 실내열교환기사이에 상호 연통되도록 개재되어 상기 냉매의 수용공간을 형성하며 상기 실내열교환기의 유출측 냉매배관의 적어도 일영역을 수용하는 수액기를 포함하는 것을 특징으로 하는 멀티형 공기조화기에 의해 달성된다.The object is, according to the present invention, a compressor for compressing a refrigerant; An outdoor heat exchanger configured to receive and heat exchange refrigerant from the compressor; A plurality of indoor heat exchangers installed to communicate with the outdoor heat exchanger; The multi-type air conditioner is interposed between the outdoor heat exchanger and the indoor heat exchanger to form a receiving space for the refrigerant and to receive at least one region of the outlet side refrigerant pipe of the indoor heat exchanger. Is achieved.

여기서, 일단이 상기 수액기와 상기 실내열교환기사이에 상호 연통되도록 연결되고, 타단이 상기 압축기의 흡입측 냉매배관에 연결되어 냉매의 우회유로를 형성하는 우회유로배관을 더 포함하도록 구성하는 것이 바람직하다.Here, the one end is preferably configured to further include a bypass flow path pipe connected to the mutual communication between the receiver and the indoor heat exchanger, the other end is connected to the suction side refrigerant pipe of the compressor to form a bypass flow path of the refrigerant.

그리고, 상기 우회유로배관에는 개도를 조절할 수 있도록 개도조절수단이 마련되어 있는 것이 효과적이다.In addition, it is effective to provide an opening degree adjusting means to adjust the opening degree in the bypass passage.

이하에서는 첨부된 도면을 참조하여 본 발명에 대하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

도 2는 본 발명의 일 실시예에 따른 멀티형 공기조화기의 개략적인 냉동사이클 구성도이다. 도시된 바와 같이, 본 멀티형 공기조화기는, 복수의 실내유니트(1a~1c)와, 복수의 실내유니트(1a~1c)와 상호 연통되도록 설치되어 상기 실내유니트(1a~1c)로부터의 냉매를 압축하여 상기 각 실내유니트(1a~1c)로 제공하는 단일의 실외유니트(21)를 가진다.Figure 2 is a schematic diagram of the refrigeration cycle of the multi-type air conditioner according to an embodiment of the present invention. As shown, the multi-type air conditioner is installed to communicate with the plurality of indoor units 1a to 1c and the plurality of indoor units 1a to 1c to compress the refrigerant from the indoor units 1a to 1c. Thus, each of the indoor units 1a to 1c has a single outdoor unit 21.

각 실내유니트(1a~1c)는 공기가 통과하면서 열교환되는 실내열교환기(3a~3c)와, 실내열교환기(3a~3c)의 일측에 배치되어 실내열교환기(3a~3c)를 통과하면서 열교환된 공기를 실내로 송풍하는 실내송풍팬(5a~5c)을 가진다. 각 실내열교환기(3a~3c)의 유입측에는 실외유니트(21)의 유출측에 접속되어 실외유니트(21)로부터의 냉매를 각 실내열교환기(3a~3c)로 제공하는 유입분기관(7)이 설치되어 있으며, 각 실내열교환기(3a~3c)의 유입측에는 유입분기관(7)으로부터 각 실내열교환기(3a~3c)로 유입되는 냉매가 감압팽창될 수 있도록 함과 동시에 개도를 조절하는 전자팽창밸브(13a~13c)가 각각 결합되어 있다.Each of the indoor units 1a to 1c is disposed on one side of the indoor heat exchangers 3a to 3c and the indoor heat exchangers 3a to 3c which are heat-exchanged while the air passes therethrough, and the heat exchangers pass through the indoor heat exchangers 3a to 3c. Indoor blowing fans 5a to 5c for blowing the air into the room. An inflow branch pipe 7 connected to the inflow side of the outdoor unit 21 on the inflow side of each of the indoor heat exchangers 3a to 3c to provide refrigerant from the outdoor unit 21 to each of the indoor heat exchangers 3a to 3c. Is installed, the inlet side of each of the indoor heat exchanger (3a ~ 3c) to allow the refrigerant flowing into the indoor heat exchanger (3a ~ 3c) from the inlet branch pipe (7) to expand and depressurize while controlling the opening degree The electromagnetic expansion valves 13a to 13c are respectively coupled.

각 실내열교환기(3a~3c)의 유출측 냉매배관에는 각 실내열교환기(3a~3c)를 통과하면서 냉각작용을 수행한 냉매가 합류될 수 있도록 유출분기관(9)이 설치되어 있다. 이들 유입분기관(7)의 유입측 및 유출분기관(9)의 유출측에는 냉동사이클이 외부에 대해 개방될 수 있도록 각각 서비스포트(11a,11b)가 형성되어 있다.The outlet side refrigerant pipes of the respective indoor heat exchangers 3a to 3c are provided with an outlet branch pipe 9 so that the refrigerant having undergone the cooling action through the respective indoor heat exchangers 3a to 3c can be joined. Service ports 11a and 11b are formed at the inflow side of the inflow branch pipe 7 and the outflow side of the outflow branch pipe 9 so that the refrigeration cycle can be opened to the outside.

실외유니트(21)는, 냉매를 압축하는 압축기(23)와, 압축기(23)와 상호 연통되도록 설치되어 냉매가 열교환되는 실외열교환기(25)와, 실외열교환기(25)의 일측에 배치되어 실외열교환기(25)의 열교환작용을 촉진시키는 실외팬(27)을 가진다. 압축기(23)의 흡입측에는 기체상태의 냉매가 흡입될 수 있도록 어큐물레이터(29)가 연결설치되어 있다.The outdoor unit 21 is disposed at one side of the outdoor heat exchanger 25 and the outdoor heat exchanger 25, which is installed to communicate with the compressor 23, which compresses the refrigerant, and the refrigerant 23 is heat-exchanged. It has an outdoor fan 27 which promotes the heat exchange effect of the outdoor heat exchanger 25. An accumulator 29 is connected to the suction side of the compressor 23 so that gaseous refrigerant can be sucked in.

실외열교환기(25)와 유입분기관(7)사이에는 냉매의 수용공간을 형성하는 통형상의 수액기(31)가 설치되어 있으며, 실외열교환기(25)로부터 제공된 냉매가 유출되는 수액기(31)의 유출측 냉매배관에는 일단이 유출분기관(9)의 유출측에 상호 연통되도록 결합되어 냉매의 우회유로를 형성하는 우회유로배관(33)이 결합되어 있다. 이 우회유로배관(33)에는 실외열교환기(25)로부터 제공되는 액상의 냉매가 감압팽창되도록 하는 전자팽창밸브(35)가 마련되어 있다.Between the outdoor heat exchanger 25 and the inlet branch pipe 7 is provided a tubular receiver 31 for forming a receiving space for the refrigerant, and a receiver for outflowing the refrigerant provided from the outdoor heat exchanger 25 ( 31 is connected to the outflow side refrigerant pipe of the outflow side refrigerant pipe (33) is coupled to the outlet side of the outlet branch pipe (9) to form a bypass flow path of the refrigerant. The bypass flow passage 33 is provided with an electromagnetic expansion valve 35 for allowing the liquid refrigerant supplied from the outdoor heat exchanger 25 to expand under reduced pressure.

한편, 수액기(31)의 내부에는 각 실내열교환기(3a~3c)를 통과한 냉매와, 우회유로를 경유한 냉매가 합류되어 통과할 수 있도록 냉매배관이 마련되어 있다. 이 냉매배관은 각 실내열교환기(3a~3c) 및 우회유로를 통과한 비교적 저온의 기상냉매가 실외열교환기(25)를 통과한 상대적으로 고온인 액상의 냉매와 상호 열교환을 용이하게 할 수 있도록 지그재그형상을 가지도록 배치되어 있다.On the other hand, inside the receiver 31, a refrigerant pipe is provided to allow the refrigerant passing through each of the indoor heat exchangers 3a to 3c and the refrigerant passing through the bypass passage to join. This refrigerant piping is such that the relatively low temperature gaseous refrigerant passing through each of the indoor heat exchangers 3a to 3c and the bypass flow passage can facilitate mutual heat exchange with the relatively high temperature liquid refrigerant passing through the outdoor heat exchanger 25. It is arranged to have a zigzag shape.

이러한 구성에 의하여, 압축기(23)에 의해 압축된 고온고압상태의 냉매는 실외열교환기(25)를 거치면서 방열되어 응축되고, 응축된 상온고압상태의 액상의 냉매는 수액기(31)를 거쳐 유입분기관(7)을 통해 운전중인 각 실내유니트(1a~1c)로 제공된다. 이 때, 도시 않은 제어부 등에 의해 운전중인 실내유니트(1a~1c)의 전자팽창밸브(13a~13c)는 적정 개도비율로 개방되고, 운전되지 않는 실내유니트(1a~1c)의 전자팽창밸브(13a~13c)는 개도를 차단하게 된다.By this configuration, the refrigerant in the high temperature and high pressure state compressed by the compressor 23 is radiated and condensed while passing through the outdoor heat exchanger 25, and the liquid refrigerant in the condensed room temperature and high pressure state passes through the receiver 31. It is provided to each indoor unit (1a ~ 1c) in operation through the inlet pipe (7). At this time, the electromagnetic expansion valves 13a to 13c of the indoor units 1a to 1c which are operated by a control unit or the like not shown are opened at an appropriate opening ratio, and the electromagnetic expansion valves 13a of the indoor units 1a to 1c which are not operated. 13c) will block the opening degree.

유입분기관(7)을 통해 각 실내유니트(1a~1c)의 냉매유입배관으로 유입된 냉매는 해당 실내열교환기(3a~3c)를 거치면서 주위의 증발잠열을 흡수하는 냉각작용을 수행하게 되고, 다시 유출분기관(9)에 의해 합류하게 된다.The refrigerant introduced into the refrigerant inlet pipe of each indoor unit (1a to 1c) through the inlet branch pipe (7) performs a cooling function to absorb the latent heat of evaporation while passing through the corresponding indoor heat exchangers (3a to 3c). Then, it is joined by the outflow branch engine 9 again.

한편, 제어부는 실내유니트(1a~1c)중 일부 만 운전되는 경우, 우회유로를 개방하여 수액기(31)를 통과한 액상의 냉매중 일부가 다시 압축기(23)의 흡입측으로 귀환할 수 있도록 한다. 우회유로배관(33)의 내부로 유입된 액상의 냉매는 전자팽창밸브(35)를 통과하면서 감압 및 팽창된 상태로 각 실내열교환기(3a~3c)를 통과한 냉매와 합류하게 된다.On the other hand, when only a part of the indoor units (1a to 1c) is operated, the control unit opens the bypass flow passage so that some of the liquid refrigerant passing through the receiver 31 can be returned to the suction side of the compressor 23 again. . The liquid refrigerant introduced into the bypass passage pipe 33 is combined with the refrigerant passing through each of the indoor heat exchangers 3a to 3c in a reduced pressure and expanded state while passing through the electronic expansion valve 35.

이들 합류된 냉매는 수액기(31)의 내부에 지그재그형상으로 배치된 냉매배관을 통과하면서 실외열교환기(25)를 통과하여 응축된 액상의 냉매로부터 열을 흡수하게 되어 과냉각상태를 해소하게 된다. 과냉각상태가 해소된 냉매는 어큐물레이터(29)의 흡입측으로 유입되고 압축기(23)에 의해 흡입 및 압축되어 반복순환하면서 냉각작용을 수행하게 된다.These joined refrigerants absorb heat from the liquid refrigerant condensed through the outdoor heat exchanger 25 while passing through the refrigerant pipe arranged in a zigzag shape inside the receiver 31 to eliminate the supercooled state. The refrigerant having the subcooled state resolved is introduced into the suction side of the accumulator 29 and sucked and compressed by the compressor 23 to perform a cooling operation while being repeatedly circulated.

전술 및 도시한 실시예에서는, 수액기의 내부에 각 실내열교환기의 유출측으로부터의 냉매배관이 지그재그형상을 가지도록 배치구성하여 설명하고 있지만, 이것은 전열면적을 증대시키기 위한 구성으로 냉매배관을 코일형상 등 다른 형상을 가지도록 구성하여도 무방하다.In the above-described and illustrated embodiments, the refrigerant pipes from the outlet side of each indoor heat exchanger are arranged in a zigzag shape in the receiver, and this is a configuration for increasing the heat transfer area. It may be configured to have other shapes such as shapes.

이상 설명한 바와 같이, 본 발명에 따르면, 각 실내열교환기를 통과하면서 냉각작용을 수행하고 압축기의 흡입측으로 귀환하는 냉매의 유로중 일부를 수액기의 내부를 통과하도록 함으로써, 종래 압축기의 토출측과 어큐물레이터의 흡입측을 연결하여 토출냉매의 일부를 흡입측으로 제공하는 우회유로배관 및 우회유로배관에 마련되는 전자팽창밸브를 동시에 제거할 수 있어 부품수의 절감에 따른 제조비용을 절감시킬 수 있도록 한 멀티형 공기조화기가 제공된다.As described above, according to the present invention, by performing a cooling action while passing through each indoor heat exchanger, a part of the flow path of the refrigerant returning to the suction side of the compressor passes through the interior of the receiver, thereby accumulating the discharge side and the accumulator of the conventional compressor. Multi-type air to reduce the manufacturing cost due to the reduction of the number of parts by removing the bypass flow pipe and bypass flow pipe that provide part of the discharge refrigerant to the suction side by connecting the suction side A harmonic is provided.

Claims (3)

냉매를 압축하는 압축기와; 상기 압축기로부터의 냉매를 수령하여 열교환하는 실외열교환기와; 상기 실외열교환기와 상호 연통되도록 설치되는 복수의 실내열교환기와; 상기 실내열교환기의 유입측에 배치되어 상기 실외열교환기로부터의 냉매를 감압팽창시키는 모세관과; 상기 실외열교환기와 상기 모세관사이에 개재되어 상기 냉매의 수용공간을 형성하며 상기 실내열교환기의 유출측 냉매배관의 적어도 일영역을 수용하여 상기 실내열교환기로부터의 냉매와 상기 수용공간내에 수용된 냉매가 상호 열교환되도록 하는 수액기를 포함하는 것을 특징으로 하는 멀티형 공기조화기.A compressor for compressing the refrigerant; An outdoor heat exchanger configured to receive and heat exchange refrigerant from the compressor; A plurality of indoor heat exchangers installed to communicate with the outdoor heat exchanger; A capillary tube disposed at an inflow side of the indoor heat exchanger to expand and expand the refrigerant from the outdoor heat exchanger under reduced pressure; Interposed between the outdoor heat exchanger and the capillary tube to form a receiving space of the refrigerant, and accommodates at least one region of the outlet side refrigerant pipe of the indoor heat exchanger so that the refrigerant from the indoor heat exchanger and the refrigerant contained in the receiving space mutually A multi-type air conditioner comprising a receiver for heat exchange. 제1항에 있어서,The method of claim 1, 일단이 상기 수액기와 상기 실내열교환기사이에 상호 연통되도록 연결되고, 타단이 상기 압축기의 흡입측 냉매배관에 연결되어 냉매의 우회유로를 형성하는 우회유로배관을 더 포함하는 것을 특징으로 하는 멀티형 공기조화기.A multi-type air conditioner, one end of which is connected to communicate with the receiver and the indoor heat exchanger, and the other end is connected to the suction side refrigerant pipe of the compressor to form a bypass flow path of the refrigerant. . 제2항에 있어서,The method of claim 2, 상기 우회유로배관에는 개도를 조절할 수 있도록 개도조절수단이 마련되어 있는 것을 특징으로 하는 멀티형 공기조화기.The bypass passage pipe is a multi-type air conditioner, characterized in that the opening degree adjusting means is provided to adjust the opening degree.
KR1019990046873A 1999-10-27 1999-10-27 Multi air conditioner KR100364534B1 (en)

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CN1329697C (en) * 2003-10-27 2007-08-01 Lg电子株式会社 Air conditioner having multiple outdoor units, and control method thereof

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JPS5912514Y2 (en) * 1978-11-22 1984-04-16 株式会社日立製作所 refrigeration cycle
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KR0160870B1 (en) * 1995-12-08 1999-01-15 정몽원 Cooling system of airconditioner
JPH09196480A (en) * 1996-01-12 1997-07-31 Hitachi Ltd Liquid refrigerating apparatus for refrigerating device
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