KR100757442B1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
KR100757442B1
KR100757442B1 KR1020050134477A KR20050134477A KR100757442B1 KR 100757442 B1 KR100757442 B1 KR 100757442B1 KR 1020050134477 A KR1020050134477 A KR 1020050134477A KR 20050134477 A KR20050134477 A KR 20050134477A KR 100757442 B1 KR100757442 B1 KR 100757442B1
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South Korea
Prior art keywords
branch
refrigerant
indoor
heat exchanger
branch passage
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KR1020050134477A
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Korean (ko)
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KR20070071213A (en
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장지영
송찬호
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엘지전자 주식회사
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Priority to KR1020050134477A priority Critical patent/KR100757442B1/en
Priority to US11/645,546 priority patent/US20070151268A1/en
Priority to EP06127265A priority patent/EP1804010A3/en
Priority to JP2006354979A priority patent/JP2007183091A/en
Priority to CA002572624A priority patent/CA2572624A1/en
Publication of KR20070071213A publication Critical patent/KR20070071213A/en
Application granted granted Critical
Publication of KR100757442B1 publication Critical patent/KR100757442B1/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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
    • 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
    • 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
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • 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
    • F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
    • 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

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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

본 발명은 공기조화기에 관한 것으로서, 냉매를 압축하는 압축기와, 상기 압축기의 일 측에 연결되는 실외열교환기를 구비한 실외기와; 실내 공기와 열교환가능하게 배치되는 실내열교환기와, 냉방 시 상기 실내열교환기의 냉매 유입 측에 병렬로 형성되는 제1분기유로 및 제2분기유로와, 상기 제1분기유로 및 상기 제2분기유로 중 어느 하나에 설치되어 냉방 시 냉매가 감압 팽창되는 실내측 모세관과, 상기 제1분기유로 및 제2분기유로 중 다른 하나에 설치되어 해당 분기유로를 개폐하는 제1개폐밸브를 구비한 실내기;를 포함하는 것을 특징으로 한다. 이에 의해, 시스템 효율을 제고시킬 수 있는 공기조화기가 제공된다. The present invention relates to an air conditioner, comprising: an outdoor unit having a compressor for compressing a refrigerant and an outdoor heat exchanger connected to one side of the compressor; An indoor heat exchanger disposed to be heat-exchangable with indoor air, and a first branch passage and a second branch passage formed in parallel to the refrigerant inlet side of the indoor heat exchanger during cooling, and among the first branch passage and the second branch passage. An indoor unit having an indoor capillary tube installed at any one of the refrigerant and expanded at a reduced pressure during cooling, and a first opening / closing valve installed at another one of the first branch passage and the second branch passage to open and close the branch passage; Characterized in that. Thereby, the air conditioner which can improve system efficiency is provided.

Description

공기조화기{AIR CONDITIONER}Air Conditioner {AIR CONDITIONER}

도 1은 종래의 공기조화기의 냉동사이클 구성도,1 is a configuration of a refrigeration cycle of a conventional air conditioner,

도 2는 본 발명의 일 실시예에 따른 공기조화기의 냉동사이클 구성도, 2 is a configuration of a refrigeration cycle of an air conditioner according to an embodiment of the present invention,

도 3은 도 2의 공기조화기의 난방 운전 시 작용을 설명하기 위한 도면이다.3 is a view for explaining the operation during the heating operation of the air conditioner of FIG.

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

110 : 실외기 111 : 압축기110: outdoor unit 111: compressor

114 : 사방밸브 121 : 실외열교환기114: four-way valve 121: outdoor heat exchanger

124 : 실외측 모세관 132 : 제3분기유로124: outdoor capillary 132: third branch flow path

134 : 실외측 전자팽창밸브 140 : 실내기134: outdoor expansion valve 140: indoor unit

141 : 실내열교환기 142 : 제1분기유로141: indoor heat exchanger 142: first quarter euro

144 : 실내측 모세관 152 : 제2분기유로144: indoor capillary 152: second branch flow path

154 : 실내측 전자팽챙밸브 154: indoor expansion valve

본 발명은, 공기조화기에 관한 것으로서, 더욱 상세하게는, 시스템 효율을 제고시킬 수 있도록 한 공기조화기에 관한 것이다.The present invention relates to an air conditioner, and more particularly, to an air conditioner capable of improving system efficiency.

도 1은 종래의 공기조화기의 냉동사이클 구성도이다. 도시된 바와 같이, 공기조화기는, 냉매를 압축하는 압축기(11)와, 압축기(11)의 일 측에 연결되어 냉매가 실외공기와 열교환되는 실외열교환기(21)와, 냉매가 실내 공기와 열교환가능하게 배치되는 실내열교환기(31)를 구비하고 있다.1 is a configuration diagram of a refrigeration cycle of a conventional air conditioner. As shown, the air conditioner includes a compressor 11 for compressing a refrigerant, an outdoor heat exchanger 21 connected to one side of the compressor 11 to exchange heat with the outdoor air, and the refrigerant with heat exchange with the indoor air. The room heat exchanger 31 arrange | positioned possibly is provided.

압축기(11)는 복수로 구성되어 있으며, 압축기(11)의 흡입측에는 각 압축기(11)에 기체상태의 냉매를 제공하기 위한 어큐뮬레이터(12)가 설치되어 있다. 압축기(11)의 토출측에는 냉방 또는 난방 운전 모드에 따라 냉매의 유로를 절환할 수 있도록 사방밸브(14)가 구비되어 있다. The compressor 11 is comprised in plurality, and the accumulator 12 for providing gaseous refrigerant | coolant to each compressor 11 is provided in the suction side of the compressor 11. The four-way valve 14 is provided on the discharge side of the compressor 11 so that the flow path of the refrigerant can be switched in accordance with the cooling or heating operation mode.

난방 운전 시 냉매의 유동방향을 따라 실외열교환기(21)의 유입측에는 냉매가 감압팽창될 수 있도록 팽창장치(22)가 설치되어 있다. An expansion device 22 is installed at the inflow side of the outdoor heat exchanger 21 along the flow direction of the refrigerant during the heating operation so that the refrigerant may expand under reduced pressure.

그런데, 이러한 종래의 공기조화기에 있어서는, 실외열교환기(21) 측에 팽창장치(22)가 배치되어 있어 팽창장치(22)와 실내열교환기(31) 사이가 멀 경우 냉방 운전 시 시스템 효율이 저하된다고 하는 문제점이 있다.However, in such a conventional air conditioner, when the expansion device 22 is disposed on the outdoor heat exchanger 21 side, when the distance between the expansion device 22 and the indoor heat exchanger 31 is far, the system efficiency during cooling operation decreases. There is a problem.

또한, 팽창장치(22)가 전자팽창밸브(EEV)로 구성되는 경우, 사용 기간이 경과되면 개도 조절의 반복에 따라 기계적 마모 또는 스프링 탄성계수(k)가 변화하여 실제 시스템이 인지하고 있는 개도가 아닌 다른 개도 값으로 운전되는 소위 전자팽창밸브의 슬립(slip) 현상이 발생되고, 이에 기인하여 시스템 다운(down) 등이 발생될 수 있다고하는 문제점이 있다. In addition, in the case where the expansion device 22 is constituted by an electromagnetic expansion valve (EEV), the mechanical wear or the spring modulus of elasticity (k) change with the repetition of the opening degree after the use period elapses, so that the actual system recognizes the opening degree. There is a problem in that a slip phenomenon of the so-called electromagnetic expansion valve that is operated at a different opening value than the above occurs, and a system down may occur due to this.

따라서, 본 발명의 목적은, 시스템 효율을 제고시킬 수 있는 공기조화기를 제공하는 것이다. Accordingly, it is an object of the present invention to provide an air conditioner capable of improving system efficiency.

상기 목적은, 본 발명에 따라, 냉매를 압축하는 압축기와, 상기 압축기의 일 측에 연결되는 실외열교환기를 구비한 실외기와; 실내 공기와 열교환가능하게 배치되는 실내열교환기와, 냉방 시 상기 실내열교환기의 냉매 유입 측에 병렬로 형성되는 제1분기유로 및 제2분기유로와, 상기 제1분기유로 및 상기 제2분기유로 중 어느 하나에 설치되어 냉방 시 냉매가 감압 팽창되는 실내측 모세관과, 상기 제1분기유로 및 제2분기유로 중 다른 하나에 설치되어 해당 분기유로를 개폐하는 제1개폐밸브를 구비한 실내기;를 포함하는 공기조화기에 의해 달성된다. The object is, according to the present invention, an outdoor unit having a compressor for compressing a refrigerant, and an outdoor heat exchanger connected to one side of the compressor; An indoor heat exchanger disposed to be heat-exchangable with indoor air, and a first branch passage and a second branch passage formed in parallel to the refrigerant inlet side of the indoor heat exchanger during cooling, and among the first branch passage and the second branch passage. An indoor unit having an indoor capillary tube installed at any one of the refrigerant and expanded at a reduced pressure during cooling, and a first opening / closing valve installed at another one of the first branch passage and the second branch passage to open and close the branch passage; Is achieved by an air conditioner.

여기서, 상기 압축기의 토출측에 배치되어 냉매의 유로를 절환하는 사방밸브를 더 포함하며, 난방 시 상기 실외열교환기의 냉매 유입측에 병렬로 형성되는 제3분기유로 및 제4분기유로와, 상기 제3분기유로 및 상기 제4분기유로 중 어느 하나에 배치되어 난방 시 냉매가 감압 팽창되는 실외측 모세관과, 다른 하나를 개폐하는 제2개폐밸브를 더 포함하는 것이 바람직하다.Here, the valve further comprises a four-way valve disposed on the discharge side of the compressor for switching the flow path of the refrigerant, the third branch flow path and the fourth branch flow path which is formed in parallel to the refrigerant inlet side of the outdoor heat exchanger when the heating, It is preferable to further include an outdoor capillary tube disposed in any one of the third branch passage and the fourth branch passage and the refrigerant is expanded under reduced pressure during heating, and a second open / close valve for opening and closing the other branch.

상기 압축기는 인버터압축기를 포함하고, 상기 제1개폐밸브는 실내측 전자팽창밸브로 구성되고, 냉방 시 상기 실내측 전자팽창밸브는 부하량에 따라 해당 분기유로를 차단하거나 설정된 개도값으로 동작되는 것이 효과적이다.The compressor includes an inverter compressor, wherein the first opening and closing valve is composed of an interior electromagnetic expansion valve, and when cooling, the interior electromagnetic expansion valve is effective to shut off the branch flow path or operate at a set opening value according to a load amount. to be.

상기 압축기의 토출측에 배치되어 냉매의 유로를 절환하는 사방밸브를 더 포함하며, 난방 시 상기 실외열교환기의 냉매 유입측에 병렬로 형성되는 제3분기유로 및 제4분기유로와, 상기 제3분기유로 및 상기 제4분기유로 중 어느 하나에 배치되고 난방 시 냉매가 감압 팽창되는 실외측 모세관과, 다른 하나의 개도를 조절하는 실외측 전자팽창밸브를 더 포함하는 것이 바람직하다. And a four-way valve disposed on the discharge side of the compressor to switch the flow path of the refrigerant, wherein the third branch path and the fourth branch path are formed in parallel on the refrigerant inlet side of the outdoor heat exchanger during heating, and the third branch. It is preferable to further include an outdoor capillary tube disposed in any one of the flow path and the fourth branch flow path and the refrigerant is expanded under reduced pressure during heating, and an outdoor electromagnetic expansion valve for controlling the other opening degree.

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

도 2는 본 발명의 일 실시예에 따른 공기조화기의 냉동사이클 구성도이고, 도 3은 도 2의 공기조화기의 난방 운전 시 작용을 설명하기 위한 도면이다. 이들 도면에 도시된 바와 같이, 본 공기조화기는, 냉매를 압축하는 압축기(111)와, 압축기(111)의 일 측에 연결되는 실외열교환기(121)를 구비한 실외기(110)와; 실내 공기와 열교환가능하게 배치되는 실내열교환기(141)와, 냉방 시 실내열교환기(141)의 유입 측에 병렬로 형성되는 제1분기유로(142) 및 제2분기유로(152)와, 제1분기유로(142) 및 상기 제2분기유로(152) 중 어느 하나에 설치되는 실내측 모세관(144)과, 제1분기유로(142) 및 제2분기유로(152) 중 다른 하나에 설치되어 해당 분기유로(142,152)를 개폐하는 제1개폐밸브로서 실내측 전자팽창밸브(154)를 구비한 실내기(140)를 포함하여 구성되어 있다.2 is a configuration diagram of a refrigeration cycle of an air conditioner according to an embodiment of the present invention, Figure 3 is a view for explaining the operation during the heating operation of the air conditioner of FIG. As shown in these figures, the present air conditioner includes: an outdoor unit 110 including a compressor 111 for compressing a refrigerant and an outdoor heat exchanger 121 connected to one side of the compressor 111; An indoor heat exchanger 141 disposed to exchange heat with the indoor air, a first branch passage 142 and a second branch passage 152 formed in parallel on an inflow side of the indoor heat exchanger 141 during cooling, and It is installed in the interior capillary tube 144 installed in any one of the first branch passage 142 and the second branch passage 152, and the other of the first branch passage 142 and the second branch passage 152. A first opening / closing valve for opening and closing the branch passages 142 and 152 is configured to include an indoor unit 140 having an indoor electromagnetic expansion valve 154.

실내기(140)는, 냉방 또는 난방 하고자 하는 각 실내 공간에 배치되는 복수의 실내열교환기(141)와, 냉방 운전 시 냉매의 유동방향을 따라 각 실내열교환기(141)의 유입측에 각각 배치되는 실내측 모세관(144) 및 실내측 전자팽창밸브(154)를 구비하고 있다.The indoor unit 140 includes a plurality of indoor heat exchangers 141 disposed in respective indoor spaces to be cooled or heated, and inlet sides of the respective indoor heat exchangers 141 along the flow direction of the refrigerant during the cooling operation. An interior capillary tube 144 and an interior electromagnetic expansion valve 154 are provided.

각 실내열교환기(141)의 유입측에는 냉매가 분기될 수 있도록 서로 병렬로 연결된 제1분기유로(142) 및 제2분기유로(152)가 각각 형성되어 있으며, 각 제1분기유로(142)에는 냉매가 감압팽창될 수 있도록 실내측 모세관(144)이 각각 구비되어 있다. 제2분기유로(152)에는 냉매유로를 개폐하거나 개도조절이 가능한 실내측 전자팽창밸브(154)가 각각 설치되어 있다.The first branch passage 142 and the second branch passage 152 connected to each other in parallel with each other so that the refrigerant is branched are formed at the inflow side of each indoor heat exchanger 141, and each of the first branch passages 142 is formed in the first branch passage 142. Indoor capillaries 144 are provided to allow the refrigerant to expand under reduced pressure, respectively. The second branch flow passage 152 is provided with an indoor expansion valve 154 for opening and closing the refrigerant flow passage and adjusting the opening degree, respectively.

한편, 실외기(110)는, 냉매를 압축하는 압축기(111)와, 압축기(111)와 연결되어 냉매가 실외공기와 열교환되는 실외열교환기(121)를 구비하고 있다. 압축기(111)는 복수로 구성되어 있다.Meanwhile, the outdoor unit 110 includes a compressor 111 for compressing a refrigerant and an outdoor heat exchanger 121 connected to the compressor 111 to exchange heat with the outdoor air. The compressor 111 is comprised in plurality.

압축기(111)의 흡입측에는 각 압축기(111)에 기체상태의 냉매를 제공할 수 있도록 어큐뮬레이터(112)가 각각 연결되어 있으며, 압축기(111)의 토출측에는 냉방 또는 난방 운전 모드에 따라 냉매의 유로를 절환할 수 있도록 사방밸브(114)가 설치되어 있다. An accumulator 112 is connected to the suction side of the compressor 111 to provide gaseous refrigerant to each of the compressors 111, and a flow path of the refrigerant is provided to the discharge side of the compressor 111 according to a cooling or heating operation mode. The four-way valve 114 is provided to be switched.

난방 운전 시 냉매의 유동방향을 따라 실외열교환기(121)의 유입측에는 냉매가 분기될 수 있도록 서로 병렬로 연결된 제3분기유로(122) 및 제4분기유로(132)가 형성되어 있으며, 제3분기유로(122)에는 실외측 모세관(124)이 설치되어 있다. 제4분기유로(132)에는 유로를 개폐 및 개도조절이 가능하도록 실외측 전자팽창밸브(134)가 구비되어 있다.In the inflow side of the outdoor heat exchanger 121 along the flow direction of the refrigerant during the heating operation, a third branch passage 122 and a fourth branch passage 132 connected in parallel to each other are formed so that the refrigerant branches. The branch passage 122 is provided with an outdoor capillary tube 124. The fourth branch flow path 132 is provided with an outdoor electromagnetic expansion valve 134 to open and close the flow path.

이러한 구성에 의하여, 냉방 운전 시, 도시 않은 제어부는, 도 2에 도시된 바와 같이, 압축기(111)에서 압축된 냉매가 실외열교환기(121)로 유동할 수 있게 유로를 절환하도록 사방밸브(114)를 제어함과 아울러 실외측 전자팽창밸브(134)가 전개되도록 한다. 이에 따라, 압축된 냉매는 실외열교환기(121)에서 열교환 되고, 실외측 전자팽창밸브(134)를 경유하여 실내기(140)로 유동된다. 이 때, 운전되는 실내기(140)의 각 실내측 전자팽창밸브(154)는 부하량에 따라 제2분기유로(152)를 차단하거나 적절한 개도값을 가지도록 제어된다. 즉, 실내측 전자팽창밸브(154)가 제2분기유로(152)를 차단하여 실내측 모세관(144)에 의해서 냉매의 감압팽창이 이루어지도록 하거나, 실내측 모세관(144) 및 실내측 전자팽창밸브(154)에서 동시에 감압팽창이 이루어지도록 할 수도 있다. 운전되는 실내열교환기(141)로 유입된 냉매는 주위의 잠열을 흡수하여 증발하면서 냉방작용을 수행하고, 사방밸브(114) 및 어큐뮬레이터(112)를 경유하여 압축기(111)로 흡입되어 압축 및 토출되는 과정을 반복하게 된다.By this configuration, during the cooling operation, the control unit, not shown, as shown in FIG. 2, the four-way valve 114 to switch the flow path so that the refrigerant compressed by the compressor 111 can flow to the outdoor heat exchanger 121. ) And the outdoor side expansion valve 134 to be deployed. Accordingly, the compressed refrigerant is heat-exchanged in the outdoor heat exchanger 121 and flows to the indoor unit 140 via the outdoor electromagnetic expansion valve 134. At this time, each of the indoor side electromagnetic expansion valve 154 of the indoor unit 140 to be operated is controlled to block the second branch passage 152 or to have an appropriate opening value according to the load amount. That is, the indoor electromagnetic expansion valve 154 blocks the second branch flow path 152 so that the refrigerant is expanded under reduced pressure by the indoor capillary tube 144, or the indoor capillary tube 144 and the electromagnetic expansion valve inside the chamber. At 154, pressure reduction may occur simultaneously. The refrigerant introduced into the indoor heat exchanger 141 being operated performs cooling by absorbing latent heat of the surroundings and evaporates. The refrigerant is sucked into the compressor 111 via the four-way valve 114 and the accumulator 112 to be compressed and discharged. The process is repeated.

한편, 난방 운전 시, 제어부는 도 3에 도시된 바와 같이, 압축된 냉매가 실내기(140)측으로 유동되게 사방밸브(114)를 제어함과 아울러, 운전되는 실내열교환기(141)측의 실내측 전자팽창밸브(154)는 전개되도록 하고 중지된 실내열교환기(141)측의 실내측 전자팽창밸브(154)는 차단되도록 제어한다. 이에 따라, 압축된 냉매는 운전되는 실내열교환기(141)로 유입되어 실내공기와 열교환되어 응축되면서 난방 작용을 수행하고, 실내측 전자팽창밸브(154)를 경유하여 실외열교환기(121) 측으로 유동된다. 실외열교환기(121) 측으로 유동된 냉매는 실외측 전자팽창밸브(134)를 통과하면서 감압팽창되고, 실외열교환기(121)에서 주위의 잠열을 흡수하여 증발된다. 실외열교환기(121)를 경유한 냉매는 사방밸브(114) 및 어큐뮬레이터(112)를 거쳐 압축기(111)로 흡입되어 압축 및 토출되는 과정을 반복하게 된다. On the other hand, during the heating operation, as shown in Figure 3, the control unit controls the four-way valve 114 so that the compressed refrigerant flows to the indoor unit 140 side, and the indoor side of the indoor heat exchanger 141 is operated The electronic expansion valve 154 is developed to be controlled and the indoor electromagnetic expansion valve 154 on the side of the stopped indoor heat exchanger 141 is blocked. Accordingly, the compressed refrigerant flows into the indoor heat exchanger 141 which is operated, exchanges heat with the indoor air, condenses, and performs heating, and flows to the outdoor heat exchanger 121 via the indoor electromagnetic expansion valve 154. do. The refrigerant flowing to the outdoor heat exchanger 121 is expanded under reduced pressure while passing through the outdoor electromagnetic expansion valve 134, and absorbs latent heat from the outdoor heat exchanger 121 to evaporate. The refrigerant passing through the outdoor heat exchanger 121 is sucked into the compressor 111 through the four-way valve 114 and the accumulator 112, and is compressed and discharged.

이상 설명한 바와 같이, 본 발명에 따르면, 냉방 운전 시 실내열교환기의 유입측에 제1 및 제2분기유로를 형성하여 분기유로 중 하나에 실내측 모세관을 설치하고 다른 하나에 유로를 개폐할 수 있도록 제1개폐밸브를 마련함으로써 냉매의 팽 창이 실내열교환기의 유입 직전에 이루어지게 되어 시스템 효율을 제고시킬 수 있으며 전자팽창밸브의 슬립 현상 발생을 억제할 수 있다. As described above, according to the present invention, during the cooling operation, the first and second branch flow paths are formed at the inflow side of the indoor heat exchanger so that one of the branch flow paths can be installed with an indoor capillary and the other can be opened and closed. By providing the first opening / closing valve, expansion of the refrigerant is performed immediately before inflow of the indoor heat exchanger, thereby improving system efficiency and suppressing occurrence of slip phenomenon of the electromagnetic expansion valve.

또한, 본 발명에 따르면, 냉방 운전 시 상기 제1개폐밸브를 실내측 전자팽창밸브로 구성하여 실내열교환기의 부하량에 따라 실내측 모세관 및/또는 실내측 전자팽창밸브에서 냉매의 감압 팽창이 이루어지도록 함으로써 시스템 효율을 제고시킬 수 있을 뿐만 아니라 전자팽창밸브의 슬립 발생을 억제 또는 지연시킬 수 있는 효과가 제공된다. In addition, according to the present invention, during the cooling operation, the first opening / closing valve is configured as an indoor expansion valve so that a reduced pressure expansion of the refrigerant is performed in the indoor capillary tube and / or the indoor expansion valve according to the load of the indoor heat exchanger. This not only improves system efficiency, but also provides an effect of suppressing or delaying slip generation of the electromagnetic expansion valve.

그리고, 본 발명에 따르면, 냉방 운전 또는 난방 운전 모드에 따라 압축된 냉매의 유로를 절환하는 사방밸브와, 냉방 시 실내열교환기의 유입측에 분기유로를 형성하여 상기 모세관 및 실내측 전자팽창밸브를 각각 설치하고, 난방 운전 시 실외열교환기의 유입측에 분기유로를 형성하고 각 분기유로 중 어느 하나에 실외측 모세관을 설치하고 다른 하나에 실외측 전자팽창밸브를 설치되도록 함으로써, 냉방 및 난방 운전 시 모두 팽창장치와 냉매가 증발되는 열교환기의 거리를 단축시킬 수 있어 시스템 효율을 제고시킬 수 있으며, 각 모세관 및 각 전자팽창밸브에서 선택적으로 냉매의 감압팽창이 이루어질 수 있어 전자팽창밸브의 슬립 발생을 억제 및/또는 슬립 발생 시점을 지연시킬 수 있는 효과가 제공된다. In addition, according to the present invention, the four-way valve for switching the flow path of the refrigerant compressed in accordance with the cooling operation or heating operation mode, and the branching flow path is formed on the inlet side of the indoor heat exchanger during cooling the capillary tube and the indoor-side expansion valve In each case, the branch flow path is formed at the inflow side of the outdoor heat exchanger during the heating operation, and the outdoor capillary tube is installed at one of the branch flow paths, and the outdoor electromagnetic expansion valve is installed at the other one. Both of them can shorten the distance between the expansion device and the heat exchanger where the refrigerant evaporates, thereby improving system efficiency.The refrigerant can be decompressed expansion in each capillary tube and each electromagnetic expansion valve to prevent slippage of the electronic expansion valve. The effect of suppressing and / or delaying the time of slip occurrence is provided.

Claims (4)

냉매를 압축하는 압축기와, 상기 압축기의 일 측에 연결되는 실외열교환기를 구비한 실외기와;An outdoor unit having a compressor for compressing a refrigerant, and an outdoor heat exchanger connected to one side of the compressor; 실내 공기와 열교환가능하게 배치되는 실내열교환기와, 냉방 시 상기 실내열교환기의 냉매 유입 측에 병렬로 형성되는 제1분기유로 및 제2분기유로와, 상기 제1분기유로 및 상기 제2분기유로 중 어느 하나에 설치되어 냉방 시 냉매가 감압 팽창되는 실내측 모세관과, 상기 제1분기유로 및 제2분기유로 중 다른 하나에 설치되어 해당 분기유로를 개폐하는 제1개폐밸브를 구비한 실내기;를 An indoor heat exchanger disposed to be heat-exchangable with indoor air, and a first branch passage and a second branch passage formed in parallel to the refrigerant inlet side of the indoor heat exchanger during cooling, and among the first branch passage and the second branch passage. An indoor unit having an indoor capillary tube installed at any one of the refrigerant and expanded at a reduced pressure during cooling, and a first opening / closing valve installed at another one of the first branch passage and the second branch passage to open and close the branch passage; 포함하는 공기조화기. Air Conditioner Included. 제1항에 있어서,The method of claim 1, 상기 압축기의 토출측에 배치되어 냉매의 유로를 절환하는 사방밸브를 더 포함하며, 난방 시 상기 실외열교환기의 냉매 유입측에 병렬로 형성되는 제3분기유로 및 제4분기유로와, 상기 제3분기유로 및 상기 제4분기유로 중 어느 하나에 배치되어 난방 시 냉매가 감압 팽창되는 실외측 모세관과, 다른 하나를 개폐하는 제2개폐밸브를 더 포함하는 것을 특징으로 하는 공기조화기.And a four-way valve disposed on the discharge side of the compressor to switch the flow path of the refrigerant, wherein the third branch path and the fourth branch path are formed in parallel on the refrigerant inlet side of the outdoor heat exchanger during heating, and the third branch. And an outdoor capillary tube disposed in any one of the flow path and the fourth branch flow path, the refrigerant being expanded under reduced pressure during heating, and a second opening / closing valve for opening and closing the other. 제1항에 있어서, The method of claim 1, 상기 압축기는 인버터압축기를 포함하고, 상기 제1개폐밸브는 실내측 전자팽창밸브로 구성되고, 냉방 시 상기 실내측 전자팽창밸브는 부하량에 따라 해당 분기유로를 차단하거나 설정된 개도값으로 동작되는 것을 특징으로 하는 공기조화기.The compressor includes an inverter compressor, wherein the first opening / closing valve is configured as an indoor expansion valve, and when cooled, the indoor expansion valve blocks the branch flow path or operates at a set opening value according to a load amount. Air conditioner. 제3항에 있어서,The method of claim 3, 상기 압축기의 토출측에 배치되어 냉매의 유로를 절환하는 사방밸브를 더 포함하며, 난방 시 상기 실외열교환기의 냉매 유입측에 병렬로 형성되는 제3분기유로 및 제4분기유로와, 상기 제3분기유로 및 상기 제4분기유로 중 어느 하나에 배치되고 난방 시 냉매가 감압 팽창되는 실외측 모세관과, 다른 하나의 개도를 조절하는 실외측 전자팽창밸브를 더 포함하는 것을 특징으로 하는 공기조화기.And a four-way valve disposed on the discharge side of the compressor to switch the flow path of the refrigerant, wherein the third branch path and the fourth branch path are formed in parallel on the refrigerant inlet side of the outdoor heat exchanger during heating, and the third branch. And an outdoor capillary tube disposed in any one of the flow path and the fourth branch flow path, wherein the refrigerant expands under reduced pressure during heating, and an outdoor electromagnetic expansion valve for controlling the other opening degree.
KR1020050134477A 2005-12-29 2005-12-29 Air conditioner KR100757442B1 (en)

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KR1020050134477A KR100757442B1 (en) 2005-12-29 2005-12-29 Air conditioner
US11/645,546 US20070151268A1 (en) 2005-12-29 2006-12-27 Air conditioner and refrigerant control method thereof
EP06127265A EP1804010A3 (en) 2005-12-29 2006-12-28 Air conditioner and refrigerant control method thereof
JP2006354979A JP2007183091A (en) 2005-12-29 2006-12-28 Air conditioner and refrigerant control method for the same
CA002572624A CA2572624A1 (en) 2005-12-29 2006-12-29 Air conditioner and refrigerant control method thereof

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CA2572624A1 (en) 2007-06-29
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JP2007183091A (en) 2007-07-19
US20070151268A1 (en) 2007-07-05

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