KR101034204B1 - Cooling and heating system - Google Patents

Cooling and heating system Download PDF

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KR101034204B1
KR101034204B1 KR1020040002288A KR20040002288A KR101034204B1 KR 101034204 B1 KR101034204 B1 KR 101034204B1 KR 1020040002288 A KR1020040002288 A KR 1020040002288A KR 20040002288 A KR20040002288 A KR 20040002288A KR 101034204 B1 KR101034204 B1 KR 101034204B1
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South Korea
Prior art keywords
refrigerant
heat exchanger
compressor
refrigerant pipe
cooling
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KR1020040002288A
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Korean (ko)
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KR20050074066A (en
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서국정
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삼성전자주식회사
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Priority to KR1020040002288A priority Critical patent/KR101034204B1/en
Priority to CNB2004100421863A priority patent/CN1311210C/en
Priority to DE602004017112T priority patent/DE602004017112D1/en
Priority to EP04253026A priority patent/EP1555494B1/en
Publication of KR20050074066A publication Critical patent/KR20050074066A/en
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Publication of KR101034204B1 publication Critical patent/KR101034204B1/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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/04—Desuperheaters
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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
    • F25B2400/0405—Refrigeration circuit bypassing means for the desuperheater
    • 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
    • F25B2400/0417—Refrigeration circuit bypassing means for the subcooler

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

Abstract

본 발명은 냉방운전효율을 상승시키기 위한 보조열교환기에 의해 난방운전효율 저하되는 것을 방지할 수 있는 냉난방시스템에 관한 것이다. The present invention relates to a cooling and heating system that can prevent the heating operation efficiency from being lowered by an auxiliary heat exchanger for increasing the cooling operation efficiency.

본 발명에 따른 냉난방시스템은 냉매를 압축하는 압축기와, 냉매가 실내공기와 열교환하게 하는 실내열교환기와, 냉매가 실외공기와 열교환하게 하는 실외열교환기와, 압축기의 토출측에 배치되며 냉난방운전에 따라 실내열교환기와 실외열교환기 중 어느 하나로 토출되게 하는 사방밸브와, 냉매를 감압팽창시키는 팽창밸브와, 냉방운전시에 압축기로 흡입되는 냉매와 실외열교환기에서 토출된 냉매가 서로 열교환되게 하는 보조열교환기를 구비하여, 난방운전시 압축기로 흡입되는 냉매와 실내열교환기에서 토출된 냉매가 서로 열교환할 경우 발생할 수 있는 난방운전효율의 저하를 방지할 수 있게 되는 작용효과가 있다. The cooling and heating system according to the present invention includes a compressor for compressing a refrigerant, an indoor heat exchanger for allowing the refrigerant to exchange heat with indoor air, an outdoor heat exchanger for allowing the refrigerant to heat exchange with outdoor air, and a heat exchanger disposed on the discharge side of the compressor. Four-way valve for discharging to any one of the air conditioner and the outdoor heat exchanger, an expansion valve for decompressing and expanding the refrigerant, and an auxiliary heat exchanger for allowing the refrigerant sucked into the compressor during the cooling operation and the refrigerant discharged from the outdoor heat exchanger In addition, there is an effect of preventing a decrease in heating operation efficiency that may occur when the refrigerant sucked into the compressor and the refrigerant discharged from the indoor heat exchanger exchange with each other during the heating operation.

Description

냉난방시스템{COOLING AND HEATING SYSTEM}Cooling and Heating System {COOLING AND HEATING SYSTEM}

도 1은 본 발명에 따른 냉난방시스템에 있어서 냉방운전시의 냉매흐름을 보인 구성도이다. 1 is a block diagram showing a refrigerant flow during the cooling operation in the cooling and heating system according to the present invention.

도 2은 본 발명에 따른 냉난방시스템에 있어서 난방운전시의 냉매흐름을 보인 구성도이다. Figure 2 is a block diagram showing a refrigerant flow during the heating operation in the air-conditioning system according to the present invention.

도 3은 본 발명에 따른 냉난방시스템에 있어서 난방운전시의 구성도로써 보조열교환기에서 열교환이 이루어질 경우가 도시되어 있다. 3 is a block diagram of the heating operation in the heating and cooling system according to the present invention shows a case where the heat exchange is made in the auxiliary heat exchanger.

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

1: 압축기 2: 사방밸브1: compressor 2: 4-way valve

3: 실외열교환기 4: 실내열교환기3: outdoor heat exchanger 4: indoor heat exchanger

5: 팽창밸브 6a: 토출냉매관5: expansion valve 6a: discharge refrigerant pipe

6b: 흡입냉매관 6c: 연결냉매관6b: suction refrigerant pipe 6c: connection refrigerant pipe

7: 급탕열교환기 7c: 급탕밸브7: Hot water supply heat exchanger 7c: Hot water valve

8: 보조열교환기 9: 바이패스냉매관8: Auxiliary heat exchanger 9: Bypass refrigerant pipe

본 발명은 냉난방시스템에 관한 것으로, 더욱 상세하게는 난방운전효율의 저하를 방지할 수 있는 냉난방시스템에 관한 것이다. The present invention relates to a cooling and heating system, and more particularly to a cooling and heating system that can prevent a decrease in heating operation efficiency.

일반적으로 냉난방시스템은 냉매를 고온 고압으로 압축하는 압축기와, 실내에 배치되는 실내열교환기와, 실외에 배치되는 실외열교환기와, 냉매를 감압팽창시키는 팽창밸브와, 압축기의 토출측에 배치되어 냉매를 실내열교환기와 실외열교환기중 어느 하나로 안내하여 냉난방을 전환하게 하는 사방밸브를 구비한 것으로, 사방밸브에 의해 고온 고압의 냉매가 실내열교환기와 실외열교환기 중 어느 하나로 안내되게 함으로써 냉방 및 난방을 수행하도록 되어 있다.In general, a cooling and heating system includes a compressor for compressing a refrigerant at high temperature and high pressure, an indoor heat exchanger disposed indoors, an outdoor heat exchanger disposed outdoors, an expansion valve for decompressing and expanding the refrigerant, and a refrigerant disposed at the discharge side of the compressor to exchange the heat inside the refrigerant. It is provided with a four-way valve to switch the heating and cooling by guiding to any one of the air conditioner and the outdoor heat exchanger, the cooling and heating is carried out by allowing the high temperature and high pressure refrigerant to be guided to any one of the indoor heat exchanger and the outdoor heat exchanger by the four-way valve.

또한, 이러한 냉난방시스템에는 냉방운전시 실외열교환기에서 토출된 냉매와 압축기로 흡입되는 냉매가 서로 열교환하게 함으로써 실내열교환기로 안내되는 냉매는 냉각되게 하고 압축기로 흡입되는 냉매는 가열되게 하여 냉방운전효율을 상승시키는 보조열교환기가 마련되어 있다. In addition, in such a cooling and heating system, the refrigerant discharged from the outdoor heat exchanger and the refrigerant sucked into the compressor exchange heat with each other so that the refrigerant guided to the indoor heat exchanger is cooled and the refrigerant sucked into the compressor is heated to improve the cooling operation efficiency. An auxiliary heat exchanger for raising is provided.

그런데, 난방운전시 압축기로 흡입되는 냉매는 실외열교환기를 통과하며 실외공기에 의해 증발 및 가열되므로, 실내열교환기에서 실외열교환기로 이동하는 냉매에 비하여 상대적으로 고온으로 유지되는데, 냉방운전시와 같이 냉매가 보조열교환기를 통과하면 실내열교환기에서 실외열교환기로 이동하는 냉매에 의해 냉각되어 액냉매가 발생하고 그에 의해 난방운전효율이 저하될 소지가 있다는 문제점이 있다. However, since the refrigerant sucked into the compressor during the heating operation passes through the outdoor heat exchanger and is evaporated and heated by the outdoor air, it is maintained at a relatively high temperature compared with the refrigerant moving from the indoor heat exchanger to the outdoor heat exchanger. Is passed through the auxiliary heat exchanger is cooled by the refrigerant moving from the indoor heat exchanger to the outdoor heat exchanger there is a problem that the liquid refrigerant is generated thereby deteriorating the heating operation efficiency.

본 발명은 이와 같은 문제점을 해결하기 위한 것으로, 본 발명의 목적은 난 방운전시 냉방운전효율을 상승시키기 위한 보조열교환기에 의한 난방운전효율이 저하되는 것을 방지할 수 있는 냉난방시스템을 제공하는 것이다.The present invention is to solve such a problem, it is an object of the present invention to provide a heating and cooling system that can prevent the heating operation efficiency is lowered by the auxiliary heat exchanger for increasing the cooling operation efficiency during the heating operation.

이러한 목적을 달성하기 위한 본 발명에 따른 냉난방시스템은, 냉매를 압축하는 압축기와, 냉매가 실내공기와 열교환하게 하는 실내열교환기와, 냉매가 실외공기와 열교환하게 하는 실외열교환기와, 냉매를 감압팽창시키는 팽창밸브와, 상기 압축기로 흡입되는 냉매를 안내하는 흡입냉매관과, 상기 흡입냉매관의 중도에 배치되어 상기 흡입냉매관을 통해 유동하는 냉매와 열교환하며 상기 압축기에 흡입되는 냉매의 온도를 제어하는 보조열교환기와, 상기 압축기로 흡입되는 냉매가 상기 보조열교환기를 우회하여 상기 압축기로 흡입되게 하는 바이패스냉매관을 포함하는 것을 특징으로 한다. In order to achieve the above object, a cooling and heating system includes a compressor for compressing a refrigerant, an indoor heat exchanger for allowing the refrigerant to exchange heat with indoor air, an outdoor heat exchanger for allowing the refrigerant to heat exchange with outdoor air, and a refrigerant for expanding under reduced pressure. An expansion valve, a suction refrigerant pipe for guiding the refrigerant sucked into the compressor, and a heat exchanger with a refrigerant disposed in the middle of the suction refrigerant pipe to control the temperature of the refrigerant sucked into the compressor And an auxiliary heat exchanger and a bypass refrigerant pipe allowing the refrigerant sucked into the compressor to be sucked into the compressor by bypassing the auxiliary heat exchanger.

또한, 상기 보조열교환기에는 상기 실외열교환기와 상기 실내열교환기 사이의 냉매 이동을 안내하는 연결냉매관의 일부가 상기 흡입냉매관의 일부와 열교환 가능하게 배치되는 것을 특징으로 한다. In the auxiliary heat exchanger, a part of the connection refrigerant pipe guiding the refrigerant movement between the outdoor heat exchanger and the indoor heat exchanger may be arranged to exchange heat with a part of the suction refrigerant pipe.

또한, 상기 바이패스냉매관은 양단이 상기 보조열교환기의 양측 상기 흡입냉매관과 연결되며, 상기 바이패스냉매관과 상기 흡입냉매관의 연결부에는 냉매가 상기 바이패스냉매관과 상기 보조열교환기 중 어느 하나로 유동하게 하는 바이패스밸브가 마련되어 있는 것을 특징으로 한다. In addition, both ends of the bypass refrigerant pipe are connected to the suction refrigerant pipe on both sides of the auxiliary heat exchanger, and a refrigerant is connected to the bypass refrigerant pipe and the suction refrigerant pipe among the bypass refrigerant pipe and the auxiliary heat exchanger. It is characterized in that the bypass valve which allows one to flow.

또한, 상기 압축기에서 토출된 냉매를 안내하는 토출냉매관에는 온수공급을 위하여 상기 토출냉매관에 병렬로 연결되는 급탕열교환기와, 급탕이 필요할 경우에 상기 급탕열교환기에 냉매가 공급되게 하는 급탕밸브가 마련되어 있는 것을 특징으로 한다. In addition, the discharge refrigerant pipe for guiding the refrigerant discharged from the compressor is provided with a hot water supply heat exchanger connected in parallel to the discharge refrigerant pipe for hot water supply, and a hot water supply valve for supplying the refrigerant to the hot water supply heat exchanger when hot water is required. It is characterized by being.

또한, 본 발명에 따른 냉난방시스템은 냉매를 압축하는 압축기와, 냉매가 실내공기와 열교환하게 하는 실내열교환기와, 냉매가 실외공기와 열교환하게 하는 실외열교환기와, 상기 압축기의 토출측에 배치되며 냉난방운전에 따라 상기 실내열교환기와 상기 실외열교환기 중 어느 하나로 토출되게 하는 사방밸브와, 냉매를 감압팽창시키는 팽창밸브와, 상기 압축기로 흡입되는 냉매를 안내하는 흡입냉매관과, 상기 흡입냉매관의 중도에 배치되어 냉방운전시에 상기 흡입냉매관을 통해 유동하는 냉매와 열교환하며 상기 압축기에 흡입되는 냉매를 가열하는 보조열교환기와, 난방운전시 상기 압축기로 흡입되는 냉매가 상기 보조열교환기를 우회하여 상기 압축기로 흡입되게 하는 바이패스냉매관을 포함하는 것을 특징으로 한다. In addition, the air-conditioning system according to the present invention includes a compressor for compressing a refrigerant, an indoor heat exchanger for allowing the refrigerant to exchange heat with indoor air, an outdoor heat exchanger for allowing the refrigerant to heat exchange with outdoor air, and a discharge side of the compressor, A four-way valve for discharging one of the indoor heat exchanger and the outdoor heat exchanger, an expansion valve for decompressing and expanding the refrigerant, a suction refrigerant pipe guiding the refrigerant sucked into the compressor, and a middle portion of the suction refrigerant pipe. Heat exchange with the refrigerant flowing through the suction refrigerant pipe during the cooling operation and heat the refrigerant sucked into the compressor, and the refrigerant sucked into the compressor during the heating operation bypasses the auxiliary heat exchanger and is sucked into the compressor. It characterized in that it comprises a bypass refrigerant pipe.

또한, 상기 보조열교환기에는 상기 실외열교환기와 상기 실내열교환기 사이의 냉매 이동을 안내하는 연결냉매관의 일부가 상기 흡입냉매관의 일부와 열교환 가능하게 배치되는 것을 특징으로 한다. In the auxiliary heat exchanger, a part of the connection refrigerant pipe guiding the refrigerant movement between the outdoor heat exchanger and the indoor heat exchanger may be arranged to exchange heat with a part of the suction refrigerant pipe.

또한. 상기 바이패스냉매관은 양단이 상기 보조열교환기의 양측 상기 흡입냉매관과 각각 연결되며, 상기 바이패스냉매관과 상기 흡입냉매관의 연결부에는 냉매가 상기 바이패스냉매관과 상기 보조열교환기 중 어느 하나로 유동하게 하는 바이패스밸브가 마련되어 있는 것을 특징으로 한다. Also. Both ends of the bypass refrigerant pipe are connected to the suction refrigerant pipes on both sides of the auxiliary heat exchanger, and a refrigerant is connected to the bypass refrigerant pipe and the suction refrigerant pipe by any one of the bypass refrigerant pipe and the auxiliary heat exchanger. It is characterized in that the bypass valve for allowing one to flow.

또한, 상기 압축기에서 토출된 냉매를 상기 사방밸브로 안내하는 토출냉매관에는 온수공급을 위하여 상기 토출냉매관에 병렬로 연결되는 급탕열교환기와, 급탕 이 필요할 경우에 상기 급탕열교환기에 냉매가 공급되게 하는 급탕밸브가 마련되어 있는 것을 특징으로 한다. In addition, the discharge refrigerant pipe for guiding the refrigerant discharged from the compressor to the four-way valve and the hot water supply heat exchanger connected in parallel to the discharge refrigerant pipe for hot water supply, and when the hot water supply is required to supply the refrigerant to the hot water supply heat exchanger It is characterized in that the hot water supply valve is provided.

또한, 상기 바이패스밸브는 난방운전시 상기 압축기로 흡입되는 냉매의 온도가 일정이상일 때, 냉매를 상기 보조열교환기로 안내하는 것을 특징으로 한다. In addition, the bypass valve is characterized in that it guides the refrigerant to the auxiliary heat exchanger when the temperature of the refrigerant sucked into the compressor during a heating operation is a predetermined value or more.

이하에서는 본 발명에 따른 바람직한 실시 예를 첨부도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the present invention will be described in detail.

본 발명에 따른 냉난방시스템은 도 1에 도시되어 있는 바와 같이, 냉매를 고온 고압으로 압축하는 압축기(1)와, 압축기(1)의 토출 측에 배치되어 냉난방운전에 따라 냉매의 흐름을 선택적으로 전환시키는 사방밸브(2)와, 실내에 배치되어 냉매가 실내공기와 열교환하게 하는 실내열교환기(4)와, 실외에 배치되어 냉매가 실외공기와 열교환하게 하는 실외열교환기(3)와, 냉매를 감압팽창시키기 위한 팽창밸브(5)를 구비한다. 본 실시예에서는 냉매로써 이산화탄소(CO2)를 사용한다. In the cooling and heating system according to the present invention, as shown in FIG. 1, a compressor 1 for compressing a refrigerant at a high temperature and high pressure and a discharge side of the compressor 1 are disposed to selectively switch the flow of the refrigerant according to an air conditioning operation. Four-way valve (2) to be arranged, an indoor heat exchanger (4) arranged in the room to allow the refrigerant to exchange heat with the indoor air, an outdoor heat exchanger (3) arranged in the outside to allow the refrigerant to heat exchange with the outdoor air, and a refrigerant An expansion valve 5 for expanding under reduced pressure is provided. In this embodiment, carbon dioxide (CO 2 ) is used as the refrigerant.

따라서, 압축기(1)로부터 토출된 고온 고압의 냉매가 사방밸브(2)의 전환동작에 따라 본 발명에 따른 냉난방시스템이 냉방과 난방중 어느 하나를 수행하게 된다. 즉, 사방밸브(2)에 의해 압축기(1)에서 토출된 고온 고압의 냉매가 실외열교환기(3)측으로 안내되면 실외열교환기(3)가 응축기의 역할을 수행하고 실내열교환기(4)가 증발기의 역할을 수행하여 본 발명의 냉난방시스템이 냉방운전을 수행하게 되고, 실내열교환기(4)측으로 흐르면 실내열교환기(4)가 응축기의 역할을 수행하고 실외열교환기(3)가 증발기의 역할을 수행하여 본 발명의 냉난방시스 템이 난방운전을 수행하게 되는 것이다. Therefore, the high temperature and high pressure refrigerant discharged from the compressor 1 causes the cooling and heating system according to the present invention to perform any one of cooling and heating according to the switching operation of the four-way valve 2. That is, when the high temperature and high pressure refrigerant discharged from the compressor 1 by the four-way valve 2 is guided to the outdoor heat exchanger 3 side, the outdoor heat exchanger 3 serves as a condenser and the indoor heat exchanger 4 The cooling and heating system of the present invention performs the cooling operation by performing the role of the evaporator, the indoor heat exchanger (4) performs the role of the condenser when the flow to the indoor heat exchanger (4) side, the outdoor heat exchanger (3) the role of the evaporator By performing the heating and cooling system of the present invention is to perform a heating operation.

이와 같은 냉난방시스템의 구성요소들은 냉매관(6a, 6b, 6c)들을 통해 폐회로로 구성되며, 냉매관(6a, 6b, 6c) 중에는 압축기(1)에서 토출된 냉매를 사방밸브(2)로 안내하는 토출냉매관(6a)과, 냉매를 사방밸브(2)에서 압축기(1)로 안내하여 압축기(1)에 흡입되게 하는 흡입냉매관(6b)과, 실외열교환기(3)와 실내열교환기(4) 사이에 마련되어 어느 일측에서 토출된 냉매를 타측으로 안내하며 그 중도에 팽창밸브(5)가 배치되는 연결냉매관(6c)이 포함되어 있다. The components of the air conditioning system are closed circuits through the refrigerant pipes 6a, 6b and 6c, and the refrigerant discharged from the compressor 1 is guided to the four-way valve 2 among the refrigerant pipes 6a, 6b and 6c. Discharge refrigerant pipe (6a), suction refrigerant pipe (6b) for guiding the refrigerant from the four-way valve (2) to the compressor (1) to be sucked into the compressor (1), the outdoor heat exchanger (3) and the indoor heat exchanger A connecting refrigerant pipe 6c provided between (4) and guiding the refrigerant discharged from one side to the other side and in which an expansion valve 5 is arranged is included.

이 때, 토출냉매관(6a)에는 온수가 필요할 경우 본 발명에 따른 냉난방시스템을 통해 온수를 공급할 수 있도록 토출냉매관(6a)에 병렬로 연결되어 물과 열교환하는 급탕열교환기(7)와, 급탕여부에 따라 냉매가 급탕열교환기(7)측으로 안내되게 하는 급탕밸브(7a)가 마련된다. At this time, the discharge refrigerant pipe (6a) and the hot water supply heat exchanger (7) connected in parallel to the discharge refrigerant pipe (6a) to heat the water to supply hot water through the cooling and heating system according to the present invention if necessary, The hot water supply valve 7a is provided to guide the refrigerant to the hot water supply heat exchanger 7 depending on the hot water supply.

또한, 본 발명에 따른 냉난방시스템에는 냉방운전시 압축기(1)로 흡입되는 냉매와 열교환하며 압축기(1)로 흡입되는 냉매를 가열하여 냉방운전효율을 향상시키는 보조열교환기(8)가 마련된다. In addition, the cooling and heating system according to the present invention is provided with an auxiliary heat exchanger (8) for exchanging heat with the refrigerant sucked into the compressor (1) during the cooling operation and heating the refrigerant sucked into the compressor (1) to improve the cooling operation efficiency.

본 실시예에서 보조열교환기(8)는 내부에 흡입냉매관(6b)의 일부와 연결냉매관(6c)의 일부가 서로 열교환 가능하게 배치되어 냉방운전시 연결냉매관(6c)을 통과하는 냉매에 의해 흡입냉매관(6b)을 통과하는 냉매가 가열되도록 되어 있다. 이 때, 보조열교환기(8)는 냉방운전시 연결냉매관(6c)을 통과하는 냉매가 팽창밸브(5)에 의해 감압팽창되기 이전에 흡입냉매관(6b)을 통과하는 냉매와 열교환할 수 있도록 팽창밸브(5)를 기준으로 실외열교환기(3)측 연결냉매관(6c)의 일부가 내부에 배 치되도록 되어있다. In the present embodiment, the subsidiary heat exchanger 8 includes a part of the suction refrigerant pipe 6b and a part of the connection refrigerant pipe 6c disposed therein so as to be heat exchanged with each other so that the refrigerant passes through the connection refrigerant pipe 6c during the cooling operation. The refrigerant passing through the suction refrigerant pipe 6b is thereby heated. At this time, the auxiliary heat exchanger 8 may exchange heat with the refrigerant passing through the suction refrigerant pipe 6b before the refrigerant passing through the connection refrigerant pipe 6c is expanded under reduced pressure by the expansion valve 5 during the cooling operation. Part of the connection refrigerant pipe (6c) of the outdoor heat exchanger (3) side is arranged inside the expansion valve (5).

또한, 본 발명에 따른 냉난방시스템에는 냉방운전시에는 보조열교환기(8)에서 열교환이 이루어지게 하다가, 난방운전시에는 보조열교환기(8)에서 열교환이 이루어지지 않도록 하기 위해 양단이 보조열교환기(8) 양측의 흡입냉매관(6b)에 각각 설치되어 냉매가 보조열교환기(8)를 우회하여 유동할 수 있게 하는 바이패스냉매관(9)과, 흡입냉매관(6b)과 바이패스냉매관(9)이 서로 연결되어 있는 연결부에 마련되어 냉방 및 난방에 따라 보조열교환기(8)와 바이패스냉매관(9)중 어느 하나로 냉매를 안내하는 바이패스밸브(9a)가 구비된다. In addition, in the cooling and heating system according to the present invention, the heat exchange is performed in the subsidiary heat exchanger 8 during the cooling operation, and in order to prevent heat exchange in the subsidiary heat exchanger 8 during the heating operation, both ends of the subsidiary heat exchanger ( 8) a bypass refrigerant pipe 9 installed in each of the suction refrigerant pipes 6b on both sides to allow the refrigerant to flow by bypassing the auxiliary heat exchanger 8, and a suction refrigerant pipe 6b and a bypass refrigerant pipe. A bypass valve 9a is provided at a connecting portion 9 connected to each other to guide the refrigerant to any one of the auxiliary heat exchanger 8 and the bypass refrigerant pipe 9 according to cooling and heating.

따라서, 난방운전시에는 바이패스밸브(9a)에 의해 압축기(1)로 흡입되는 냉매가 보조열교환기(8)를 통과하지 않고 바이패스냉매관(9)을 통해 곧장 압축기(1)로 유입되게 되어 있는데, 이는 난방운전시 연결냉매관(6c)을 통해 실외열교환기(3)에 공급되는 냉매는 팽창밸브(5)에 의해 팽창되어 실외공기에 비하여 상대적으로 낮은 온도를 가지므로 실외열교환기(3)를 통과하는 과정에서 실외공기에 의해 가열되어 증발될 뿐만 아니라 그 온도가 상승하게 되는데, 이와 같이 실외공기에 의해 가열된 냉매가 흡입냉매관(6b)을 따라 보조열교환기(8)를 통과하면 연결냉매관(6c)을 통과하는 냉매에 의해 다시 냉각되어 액냉매가 발생할 소지가 있으므로 이를 방지하기 위한 것이다. Therefore, during the heating operation, the refrigerant sucked into the compressor 1 by the bypass valve 9a does not pass through the auxiliary heat exchanger 8 but flows directly into the compressor 1 through the bypass refrigerant pipe 9. This is because the refrigerant supplied to the outdoor heat exchanger (3) through the connecting refrigerant pipe (6c) during the heating operation is expanded by the expansion valve (5) has a relatively low temperature compared to the outdoor air (external heat exchanger ( In the process of passing through 3), not only the air is heated and evaporated by the outdoor air but also its temperature rises. Thus, the refrigerant heated by the outdoor air passes through the auxiliary heat exchanger 8 along the suction refrigerant pipe 6b. The lower surface is cooled by the refrigerant passing through the connection refrigerant pipe (6c) to prevent the liquid refrigerant may occur.

또한, 본 발명에 따른 냉난방시스템에 있어서 바이패스밸브(9a)는 난방운전시 압축기(1)로 흡입되는 냉매의 온도가 일정이상일 경우 냉매를 보조열교환기(8)로 안내하도록 되어 있는데, 이는 압축기(1)로 흡입되는 냉매의 온도가 일정이상일 경우 작용하는 압력이 높아져 압축기(1)에 과도한 부하가 작용하므로, 압축기(1)로 흡입되는 냉매가 보조열교환기(8)를 통과하며 연결냉매관(6c)을 통과하는 냉매에 의해 냉각되게 함으로써 이를 예방하기 위한 것이다. In addition, in the heating and cooling system according to the present invention, the bypass valve 9a is configured to guide the refrigerant to the auxiliary heat exchanger 8 when the temperature of the refrigerant sucked into the compressor 1 during the heating operation is higher than a predetermined value. When the temperature of the refrigerant sucked into (1) is higher than or equal to a predetermined temperature, an excessive pressure acts on the compressor (1) because the pressure applied to the compressor (1) passes through the auxiliary heat exchanger (8). This is to prevent this by allowing the refrigerant to pass through 6c.

다음은 이와 같이 구성된 본 발명에 따른 냉난방시스템의 동작 및 작용효과를 설명한다. The following describes the operation and effect of the cooling and heating system according to the present invention configured as described above.

먼저, 본 발명에 따른 냉난방시스템이 냉방운전할 경우를 살펴보면, 냉방운전시 압축기(1)에서 토출된 고온 고압의 냉매는 사방밸브(2)에 의해 실외열교환기(3)로 안내된다. 따라서 냉방운전시 실외열교환기(3)는 응축기의 역할을 수행하고 실내열교환기(4)는 증발기의 역할을 수행한다. First, when the cooling and heating system according to the present invention is a cooling operation, the high temperature and high pressure refrigerant discharged from the compressor (1) during the cooling operation is guided to the outdoor heat exchanger (3) by the four-way valve (2). Therefore, during the cooling operation, the outdoor heat exchanger 3 serves as a condenser and the indoor heat exchanger 4 serves as an evaporator.

실외열교환기(3)에 전달된 냉매는 열을 방출하며 냉각된 후 연결냉매관(6c)에 마련된 팽창밸브(5)를 통과하며 감압팽창되고 실내열교환기(4)로 전달되어 실내공기와 열교환하며 열을 흡수하여 실내를 냉방한다. 냉매는 계속해서 사방밸브(2)와 흡입냉매관(6b)을 통해 다시 압축기(1)로 흡입된다. The refrigerant delivered to the outdoor heat exchanger (3) is cooled by releasing heat and then passing through the expansion valve (5) provided in the connecting refrigerant pipe (6c), expanding under reduced pressure, and transferred to the indoor heat exchanger (4) to exchange heat with indoor air. It absorbs heat and cools the room. The refrigerant is subsequently sucked back into the compressor 1 through the four-way valve 2 and the suction refrigerant pipe 6b.

이와 같이 냉방운전이 수행될 때 바이패스밸브(9a)는 냉매를 보조열교환기(8)로 안내하므로 연결냉매관(6c)을 통과하는 냉매와 흡입냉매관(6b)을 통과하는 냉매는 보조열교환기(8)에서 서로 열교환한다. 이에 따라 연결냉매관(6c)을 통해 실내열교환기(4)로 안내되는 냉매는 냉각되고 흡입냉매관(6b)을 통해 압축기(1)로 안내되는 냉매는 가열되어 냉난방시스템의 냉방운전효율은 증가한다. In this way, when the cooling operation is performed, the bypass valve 9a guides the refrigerant to the auxiliary heat exchanger 8, so that the refrigerant passing through the connection refrigerant pipe 6c and the refrigerant passing through the suction refrigerant pipe 6b are subjected to auxiliary heat exchange. Heat exchange with each other in the group (8). Accordingly, the refrigerant guided to the indoor heat exchanger 4 through the connection refrigerant pipe 6c is cooled and the refrigerant guided to the compressor 1 through the suction refrigerant pipe 6b is heated to increase the cooling operation efficiency of the air conditioning system. do.

다음으로, 도 2를 참조하여 본 발명에 따른 냉난방시스템이 난방운전할 경우 를 살펴보면, 난방운전시 압축기(1)에서 토출된 고온 고압의 냉매가 사방밸브(2)에 의해 실내열교환기(4)로 안내된다. 따라서 난방운전시 실내열교환기(4)는 응축기의 역할을 수행하고 실외열교환기(3)는 증발기의 역할을 수행한다. Next, referring to Figure 2 when the heating and cooling system according to the present invention when the heating operation, the high temperature and high pressure refrigerant discharged from the compressor (1) during the heating operation to the indoor heat exchanger (4) by the four-way valve (2) You are guided. Therefore, during the heating operation, the indoor heat exchanger 4 serves as a condenser and the outdoor heat exchanger 3 serves as an evaporator.

실내열교환기(4)에 전달된 냉매는 실내공기와 열교환하며 열을 방출하여 실내를 난방한다. 냉매는 계속해서 팽창밸브(5)에 전달되어 감압팽창된 후 연결냉매관(6c)을 통해 실외열교환기(3)로 전달되어 실외열교환기(3)에서 실외공기와 열교환하며 열을 흡수하여 가열된 후 다시 사방밸브(2)와 흡입냉매관(6b)을 통해 압축기(1)로 흡입된다. The refrigerant delivered to the indoor heat exchanger (4) exchanges heat with the indoor air and releases heat to heat the room. The refrigerant is continuously delivered to the expansion valve (5) and expanded under reduced pressure, and then transferred to the outdoor heat exchanger (3) through the connecting refrigerant pipe (6c) to exchange heat with outdoor air in the outdoor heat exchanger (3) to absorb heat and heat it. After the suction is again sucked into the compressor 1 through the four-way valve (2) and the suction refrigerant pipe (6b).

이와 같이 난방운전이 수행될 때 바이패스밸브(9a)는 냉매를 바이패스냉매관(9)으로 안내하여 냉매가 보조열교환기(8)를 통과하지 않고 바이패스냉매관(9)을 통해 우회하여 압축기(1)에 곧바로 흡입되므로 연결냉매관(6c)을 통과하는 냉매와 압축기(1)로 흡입되는 냉매 사이의 열교환은 발생하지 않는다. As such, when the heating operation is performed, the bypass valve 9a guides the refrigerant to the bypass refrigerant pipe 9 so that the refrigerant bypasses the bypass refrigerant pipe 9 without passing through the auxiliary heat exchanger 8. Since it is directly sucked into the compressor 1, heat exchange between the refrigerant passing through the connecting refrigerant pipe 6c and the refrigerant sucked into the compressor 1 does not occur.

또한, 난방운전시, 압축기(1)로 흡입되는 냉매의 온도가 일정이상인 것이 체크되면, 도 3에 도시되어 있는 바와 같이 바이패스밸브(9a)에 의해 흡입냉매관(6b)을 통과하는 냉매는 보조열교환기(8)로 안내된다. 이에 따라 흡입냉매관(6b)을 통과하여 압축기(1)로 흡입되는 냉매는 연결냉매관(6c)을 통과하는 냉매와 열교환하며 냉각되고 그에 따라 압축기(1)로 흡입되는 냉매의 온도는 낮아진다. In addition, when it is checked that the temperature of the refrigerant sucked into the compressor 1 is higher than or equal to a certain value during the heating operation, the refrigerant passing through the suction refrigerant pipe 6b by the bypass valve 9a as shown in FIG. Guided to the auxiliary heat exchanger (8). Accordingly, the refrigerant sucked into the compressor 1 through the suction refrigerant pipe 6b is heat-exchanged with the refrigerant passing through the connection refrigerant pipe 6c and is cooled, thereby lowering the temperature of the refrigerant sucked into the compressor 1.

또한, 본 발명에 따른 냉난방시스템에는 토출냉매관(6a)에 급탕열교환기(7)가 병렬로 연결되어 있으므로 급탕이 필요할 경우 압축기(1)에서 토출된 고온 고압의 냉매가 급탕열교환기(7)에 공급되어 물을 가열하여 온수를 발생시킨다.In addition, in the cooling and heating system according to the present invention, since the hot water supply heat exchanger 7 is connected to the discharge refrigerant pipe 6a in parallel, the hot water high pressure refrigerant discharged from the compressor 1 is supplied to the hot water heat exchanger 7 when hot water supply is required. It is supplied to and heats water to generate hot water.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 냉난방시스템은 난방운전시에 냉매가 보조열교환기를 우회할 수 있게 하는 바이패스냉매관과 바이패스밸브가 마련되어 있으므로, 난방운전시 보조열교환기에서 발생할 수 있는 난방운전효율의 저하를 방지할 수 있게 되는 작용효과가 있다. As described in detail above, the air conditioning system according to the present invention is provided with a bypass refrigerant pipe and a bypass valve for allowing the refrigerant to bypass the auxiliary heat exchanger during the heating operation, which may occur in the auxiliary heat exchanger during the heating operation. There is an action effect that can prevent the deterioration of the heating operation efficiency.

또한, 본 발명에 따른 냉난방시스템은 압축기로 유입되는 냉매의 온도가 일정 이상일 경우 흡입냉매관을 통과하는 냉매는 보조열교환기로 안내되어 연결냉매관을 통과하는 냉매에 의해 냉각되므로 압축기에 과도한 부하가 작용하는 것을 방지할 수 있게 되는 작용효과가 있다. In addition, in the cooling and heating system according to the present invention, when the temperature of the refrigerant flowing into the compressor is greater than or equal to a predetermined temperature, the refrigerant passing through the suction refrigerant pipe is guided to the auxiliary heat exchanger and cooled by the refrigerant passing through the connection refrigerant pipe, so that an excessive load is applied to the compressor. There is an effect that can be prevented.

Claims (9)

냉매를 압축하는 압축기;A compressor for compressing the refrigerant; 냉매가 실내공기와 열교환하게 하는 실내열교환기;An indoor heat exchanger for allowing the refrigerant to exchange heat with the indoor air; 냉매가 실외공기와 열교환하게 하는 실외열교환기;An outdoor heat exchanger for allowing the refrigerant to heat exchange with the outdoor air; 냉매를 감압팽창시키는 팽창밸브;An expansion valve for expanding the refrigerant under reduced pressure; 상기 압축기의 토출측에 배치되며 냉난방운전에 따라 상기 압축기에서 압축된 냉매가 상기 실외열교환기 또는 실내열교환기 중 어느 하나로 토출되도록 제어하는 사방밸브;A four-way valve disposed on the discharge side of the compressor and controlling the refrigerant compressed by the compressor to be discharged to either the outdoor heat exchanger or the indoor heat exchanger according to a cooling and heating operation; 상기 압축기로 흡입되는 냉매를 안내하는 흡입냉매관;A suction refrigerant pipe guiding the refrigerant sucked into the compressor; 상기 실외열교환기와 상기 실내열교환기 간의 냉매의 이동을 안내하고 중도에 상기 팽창밸브가 설치된 연결냉매관;A connection refrigerant pipe guiding a movement of the refrigerant between the outdoor heat exchanger and the indoor heat exchanger and installed with the expansion valve halfway; 상기 연결냉매관을 통과하는 냉매가 상기 흡입냉매관을 통과하는 냉매와 열교환하게 하는 보조열교환기;An auxiliary heat exchanger for allowing the refrigerant passing through the connection refrigerant pipe to exchange heat with the refrigerant passing through the suction refrigerant pipe; 상기 보조열교환기에서 열교환이 이루어지는 것을 방지하도록 상기 보조열교환기를 우회하여 상기 압축기로 냉매를 안내하는 바이패스냉매관; 및A bypass refrigerant pipe bypassing the auxiliary heat exchanger to guide refrigerant to the compressor to prevent heat exchange in the auxiliary heat exchanger; And 냉매가 상기 보조열교환기 또는 상기 바이패스냉매관 중 어느 하나를 통과하여 상기 압축기로 안내되도록 제어하는 바이패스밸브; 를 포함하며,Bypass valve for controlling the refrigerant to be guided to the compressor through any one of the auxiliary heat exchanger or the bypass refrigerant pipe; Including; 상기 바이패스밸브는 난방운전시 상기 압축기로 흡입되는 냉매의 온도가 일정 이상일 때, 냉매의 온도를 하강시키도록 냉매가 상기 보조열교환기를 통과하도록 제어되는 것을 특징으로 하는 냉난방시스템.The bypass valve is a heating and cooling system characterized in that the refrigerant is passed through the auxiliary heat exchanger to lower the temperature of the refrigerant when the temperature of the refrigerant sucked into the compressor during the heating operation is more than a predetermined. 제 1항에 있어서, The method of claim 1, 상기 압축기에서 토출된 냉매를 안내하는 토출냉매관에는 온수공급을 위하여 상기 토출냉매관에 병렬로 연결되는 급탕열교환기와, 급탕이 필요할 경우에 상기 급탕열교환기에 냉매가 공급되게 하는 급탕밸브가 마련되어 있는 것을 특징으로 하는 냉난방시스템.The discharge refrigerant pipe guiding the refrigerant discharged from the compressor is provided with a hot water supply heat exchanger connected in parallel to the discharge refrigerant pipe for hot water supply, and a hot water supply valve for supplying the refrigerant to the hot water supply heat exchanger when hot water is required. Heating and cooling system characterized by. 삭제delete 제 1항에 있어서, The method of claim 1, 상기 냉매는 이산화탄소(CO2)인 것을 특징으로 하는 냉난방시스템.The coolant is a cooling and heating system, characterized in that carbon dioxide (CO 2 ). 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
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