KR20090021594A - Heat pump air conditioner - Google Patents

Heat pump air conditioner Download PDF

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Publication number
KR20090021594A
KR20090021594A KR1020070086227A KR20070086227A KR20090021594A KR 20090021594 A KR20090021594 A KR 20090021594A KR 1020070086227 A KR1020070086227 A KR 1020070086227A KR 20070086227 A KR20070086227 A KR 20070086227A KR 20090021594 A KR20090021594 A KR 20090021594A
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South Korea
Prior art keywords
heat exchanger
refrigerant
compressor
indoor
air conditioner
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KR1020070086227A
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Korean (ko)
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박민수
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주식회사 대우일렉트로닉스
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Priority to KR1020070086227A priority Critical patent/KR20090021594A/en
Publication of KR20090021594A publication Critical patent/KR20090021594A/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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • 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

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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)

Abstract

A heat pump air-conditioner is provided to perform defrost operation and indoor heating operation at the same time by flowing a part of the refrigerant of high temperature discharged from a compressor to a sub heat-exchanger. A compressor(110) compresses inhaled refrigerant at high pressure and high temperature and discharges the compacted refrigerant. An outdoor heat exchanger(130) and an indoor heat exchanger(120) are connected through the compressor and a pipe. An expansion mechanism(140) is connected between the indoor heat exchanger and the outdoor heat exchanger and decompresses the refrigerant transferred from the indoor heat exchanger or the outdoor heat exchanger. A 4-way valve(150) changes the flow of the refrigerant discharged from the compressor. An accumulator(160) is equipped between the 4-way valve and the compressor and provides the gas refrigerant to the compressor. A sub heat-exchanger(170) performs the heat exchange of the indoor air and the refrigerant. A by-pass unit flows a part of the refrigerant discharged from the compressor to the sub heat-exchanger in defrost operation.

Description

지속적인 난방운전이 가능한 히트펌프 공기조화기{HEAT PUMP AIR CONDITIONER}Heat Pump Air Conditioner with Continuous Heating Operation {HEAT PUMP AIR CONDITIONER}

본 발명은 히트펌프 공기조화기에 관한 것으로서, 더욱 상세하게는 실내 열교환기와는 별도의 보조 열교환기를 설치하고, 압축기로부터 토출되는 냉매 중 일부가 상기 보조 열교환기로 유입되도록 하여 제상운전 중에도 지속적으로 실내를 난방할 수 있는 지속적인 난방운전이 가능한 히트펌프 공기조화기에 관한 것이다.The present invention relates to a heat pump air conditioner, and more particularly, to install an auxiliary heat exchanger separate from the indoor heat exchanger, and to allow some of the refrigerant discharged from the compressor to flow into the auxiliary heat exchanger to continuously heat the room even during defrosting operation. Heat pump air conditioner capable of continuous heating operation can be.

일반적으로, 히트펌프식 공기조화장치는 사방밸브를 통해 냉매의 순환경로를 역으로 변경시켜 냉방과 난방을 겸할 수 있도록 된 것으로, 이러한 히트펌프식 공기조화장치를 좀 더 자세히 살펴보면, 냉매 가스를 고온ㆍ고압의 상태로 응축 압력까지 압축하는 압축기와, 상기 압축기에서 압축된 냉매를 액체 상태로 응축하면서 열교환이 이루어지는 실외 열교환기와, 상기 실외 열교환기에서 응축된 고온ㆍ고압 상태의 액체 냉매를 교축작용에 의하여 저압상태의 기체 냉매로 팽창시키는 팽창밸브와, 상기 팽창밸브에서 팽창된 냉매를 증발시키면서 열교환이 이루어지는 실내 열교환기와, 냉매의 흐름을 전환시키는 사방밸브 및 이물질 등을 여과하며 액체 냉매가 상기 압축기로 흡입되는 것을 방지하는 액분리기(Accumulator)로 이루어진다.In general, the heat pump type air conditioner has a four-way valve to reverse the circulation path of the refrigerant to serve as both cooling and heating. Looking at the heat pump type air conditioner in more detail, the refrigerant gas is heated at a high temperature. A compressor for compressing the condensing pressure in a high pressure state, an outdoor heat exchanger for condensing the refrigerant compressed in the liquid state in a liquid state, and a liquid refrigerant in a high temperature / high pressure state condensed in the outdoor heat exchanger for throttling. The expansion valve to expand to the low-pressure gas refrigerant, the indoor heat exchanger to exchange heat while evaporating the refrigerant expanded from the expansion valve, the four-way valve and the foreign matter to switch the flow of the refrigerant and the liquid refrigerant to the compressor It consists of an accumulator to prevent inhalation.

이러한 히트펌프식 공기조화장치는, 냉매가 순환되는 동안 기체 → 액체 및 액체 → 기체로 연속적으로 상태 변화되는 한편, 상기 사방밸브를 통해 난방 및 냉방 운전으로 전환할 수 있게 된다.The heat pump type air conditioner is capable of switching to heating and cooling operation through the four-way valve while continuously changing the state from gas to liquid and liquid to gas while the refrigerant is circulated.

한편, 히트펌프식 공기조화장치는 난방모드에서 실외온도가 통상 -2℃ ~ -5℃ 이하로 떨어지게 되면, 상기 실외 열교환기가 착상 혹은 결빙되어, 난방효율이 급격히 저하되는 문제점이 있었다.On the other hand, in the heat pump type air conditioner, when the outdoor temperature drops to -2 ° C. to −5 ° C. or less in the heating mode, the outdoor heat exchanger is frosted or frozen, and there is a problem in that the heating efficiency is sharply lowered.

종래에는 이러한 문제점을 해결하기 위해, 상기 실외 열교환기에 온도감지센서를 설치하고, 상기 온도감지센서와 제어부를 연결하여, 상기 온도감지센서에서 감지된 온도가 설정온도 이하로 떨어지면 상기 제어부에서 발생된 신호에 의해 상기 사방밸브를 전환시켜 제상모드를 실시하여 왔다.Conventionally, in order to solve this problem, by installing a temperature sensor in the outdoor heat exchanger, connecting the temperature sensor and the controller, when the temperature detected by the temperature sensor falls below a set temperature signal generated by the controller The four-way valve was switched to perform the defrost mode.

그러나 전술한 난방 순환에서의 제상구조는 냉매의 순환 사이클을 역으로 순환(냉방 순환)시켜 상기 실외 열교환기의 착상 및 결빙을 제거하므로, 장시간 제상운전을 수행하는 경우 난방 운전을 방해하여 난방효율이 저하되는 문제점이 있었다.However, the defrosting structure in the above-described heating circulation circulates (circulates cooling) the refrigerant cycle in reverse, thus eliminating the frosting and freezing of the outdoor heat exchanger. Therefore, when performing the defrosting operation for a long time, the heating efficiency is interrupted by the heating operation. There was a problem of deterioration.

또한, 난방효율을 고려하여 단시간 제상운전을 수행하는 경우, 실외 열교환기의 착상 및 결빙이 완전하게 제거되지 않아 열교환 효율이 저하되는 문제점이 있었다.In addition, in the case of performing the defrosting operation for a short time in consideration of the heating efficiency, there is a problem that the heat exchange efficiency is lowered because the frosting and freezing of the outdoor heat exchanger is not completely removed.

상기한 문제점을 해결하기 위하여 본 발명은 겨울철 제상운전 수행시 냉방 싸이클로의 전환을 통해 실외 열교환기를 제상함과 동시에 실내의 난방을 수행할 수 있는 지속적인 난방운전이 가능한 히트펌프 공기조화기를 제공하는데 그 목적이 있다.In order to solve the above problems, the present invention provides a heat pump air conditioner capable of continuous heating operation capable of performing indoor heating while defrosting an outdoor heat exchanger by switching to a cooling cycle when performing winter defrosting operation. There is this.

상기한 목적을 달성하기 위한 본 발명의 형태에 따르면, 흡입되는 냉매를 고온고압으로 압축하여 토출하는 압축기; 상기 압축기와 배관으로 연결되어 공기와 열교환하는 실외열교환기 및 실내열교환기; 상기 실내열교환기와 실외열교환기 사이에 연결되어 어느 일측에서 이송되어 오는 냉매를 감압하는 팽창기구; 상기 압축기로부터 토출되는 냉매 흐름을 바꾸도록 절환되는 사방밸브; 기체상태의 냉매가 상기 압축기로 제공되도록 상기 사방밸브와 상기 압축기 사이에 구비되는 어큐뮬레이터; 제상 운전시, 상기 압축기로부터 토출되는 냉매 중 일부가 유입되어 실내 공기와 열교환하는 보조 열교환기; 및 제상 운전시, 상기 압축기로부터 토출되는 냉매 중 일부가 상기 보조 열교환기로 유입되도록 하는 바이패스 수단을 포함하는 것을 특징으로 한다.According to an aspect of the present invention for achieving the above object, a compressor for compressing and discharging a refrigerant to be sucked at high temperature and high pressure; An outdoor heat exchanger and an indoor heat exchanger connected to the compressor and a pipe to exchange heat with air; An expansion mechanism connected between the indoor heat exchanger and the outdoor heat exchanger to depressurize the refrigerant transferred from one side; A four-way valve switched to change a refrigerant flow discharged from the compressor; An accumulator provided between the four-way valve and the compressor to provide a gaseous refrigerant to the compressor; An auxiliary heat exchanger in which some of the refrigerant discharged from the compressor flows in during defrost operation and heat-exchanges with indoor air; And bypass means for allowing some of the refrigerant discharged from the compressor to flow into the auxiliary heat exchanger during the defrosting operation.

또한, 상기 바이패스 수단은 상기 압축기로부터 토출되는 냉매가 상기 보조 열교환기를 지나 상기 팽창기구 측으로 유입되도록 연결한 바이패스 배관 및 상기 바이패스 배관을 선택적으로 개방하는 솔레노이드 밸브를 포함하는 것을 특징으로 한다.The bypass means may include a bypass pipe connecting the refrigerant discharged from the compressor to the expansion mechanism side through the auxiliary heat exchanger and a solenoid valve for selectively opening the bypass pipe.

또한, 상기 실외 열교환기를 통과한 냉매가 상기 보조 열교환기로 유입되지 않도록 상기 바이패스 배관에 체크 밸브를 설치한 것을 특징으로 한다.In addition, a check valve is installed in the bypass pipe so that the refrigerant passing through the outdoor heat exchanger does not flow into the auxiliary heat exchanger.

또한, 상기 보조 열교환기는 상기 실내 열교환기의 본체 내부에 상기 실내 열교환기와 구획되도록 설치한 것을 특징으로 한다.In addition, the auxiliary heat exchanger is installed so as to be partitioned with the indoor heat exchanger inside the body of the indoor heat exchanger.

본 발명은 압축기로부터 토출되는 고온의 냉매 중 일부가 별도의 보조 열교환기 측으로 유입되도록 하여 겨울철 제상운전 시, 사방밸브가 절환되어 실내 열교환기 측으로 차가운 냉매가 유입되더라도, 보조 열교환기 측으로 뜨거운 냉매가 유입되어 제상운전과 동시에 실내를 난방할 수 있는 효과가 있다.The present invention allows a portion of the high-temperature refrigerant discharged from the compressor to be introduced into a separate auxiliary heat exchanger side during the winter defrosting operation, even if the four-way valve is switched to the cold refrigerant flows into the indoor heat exchanger side, the hot refrigerant flows into the auxiliary heat exchanger side. The defrosting operation and the room can be heated at the same time.

이하, 첨부된 도면을 참조하여 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 바람직한 실시예를 설명한다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of a heat pump air conditioner capable of continuous heating operation according to the present invention.

도 1은 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 난방운전시의 냉매 회로도를 도시한 도면이고, 도 2는 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 제상운전시 냉매 회로도를 도시한 도면이다.1 is a view showing a refrigerant circuit diagram during a heating operation of the heat pump air conditioner capable of continuous heating operation according to the present invention, Figure 2 is a defrost operation of the heat pump air conditioner capable of continuous heating operation according to the present invention Is a diagram illustrating a city refrigerant circuit diagram.

도 1 및 도 2에 도시된 바와 같이, 본 발명은 흡입되는 냉매를 고온고압으로 압축하여 토출하는 압축기(110), 압축기(110)와 배관으로 연결되어 외부공기와 열교환하는 실내 열교환기(120) 및 실외 열교환기(130), 실내 열교환기(120) 및 실외 열교환기(130) 사이에 설치되어 냉매를 감압 팽창하는 모세관 또는 전자팽창밸브 등의 팽창기구(140), 냉방운전 또는 난방운전에 따라 냉매의 흐름을 절환하는 사방밸브(150), 및 사방밸브(150)와 압축기(110) 사이에 설치되어 액냉매를 걸러 기체상태의 냉매가 압축기(110)로 유입되도록 하는 어큐믈레이터(160)를 포함하여 선택적으로 냉방운전 및 난방운전을 하는 히트 펌프 공기조화기로서, 제상운전시 압축기(110)로부터 토출되는 냉매 중 일부가 유입되어 실내공기와 열교환하는 보조 열교환기(170) 및 압축기(110)로부터 토출되는 고온고압의 냉매가 보조 열교환기(170)로 유입되도록 하는 바이패스 수단을 포함한다.As shown in FIG. 1 and FIG. 2, the present invention is a compressor (110) for compressing and discharging a refrigerant to be sucked at high temperature and high pressure, and an indoor heat exchanger (120) connected to the compressor (110) by piping to exchange heat with external air. And an expansion mechanism 140 installed between the outdoor heat exchanger 130, the indoor heat exchanger 120, and the outdoor heat exchanger 130, such as a capillary tube or an electronic expansion valve that expands and reduces the refrigerant under reduced pressure. Four-way valve 150 for switching the flow of the refrigerant, and the accumulator 160 is installed between the four-way valve 150 and the compressor 110 to filter the liquid refrigerant so that the gaseous refrigerant flows into the compressor 110. A heat pump air conditioner selectively cooling and heating operation including a, the auxiliary heat exchanger (170) and the compressor (110) for heat exchange with the indoor air by introducing a portion of the refrigerant discharged from the compressor (110) during defrosting operation Discharged from Includes by-pass means for the high-temperature and high-pressure refrigerant that flows into the auxiliary heat exchanger 170.

보조 열교환기(170)는 실내 열교환기(120)의 일측에 설치되어 난방운전 시에는 작동을 하지 않으며, 제상운전 시에만 작동함으로써, 실내의 난방이 유지되도록 한다.The auxiliary heat exchanger 170 is installed on one side of the indoor heat exchanger 120 and does not operate during a heating operation, and operates only during a defrosting operation so that the heating of the indoor is maintained.

바이패스 수단은 압축기(110)로부터 토출되는 냉매가 보조 열교환기(170)로 유입되도록 함과 동시에, 보조 열교환기(170)로 유입된 냉매가 팽창기구(140)로 유입되도록, 압축기(110)와 사방밸브(150) 사이의 배관으로부터 분기되어 보조 열교환기(170)에 연결되고, 보조 열교환기(170)로부터 연장되어 실외 열교환기(130)와 팽창기구(140) 사이의 배관에 연결된 바이패스 배관(180)을 포함한다.The bypass means allows the refrigerant discharged from the compressor 110 to flow into the auxiliary heat exchanger 170 and at the same time the refrigerant introduced into the auxiliary heat exchanger 170 flows into the expansion mechanism 140. And branched from the pipe between the four-way valve 150 and connected to the auxiliary heat exchanger 170, extending from the auxiliary heat exchanger 170 and connected to the pipe between the outdoor heat exchanger 130 and the expansion mechanism 140. The pipe 180 is included.

또한, 압축기(110)와 사방밸브(150)로부터 분기되어 보조 열교환기(170)와 연결된 바이패스 배관(180)에는 냉매의 유입을 제어하도록 선택적으로 개방되는 솔레노이드 밸브(181)가 설치된다.In addition, the bypass pipe 180 branched from the compressor 110 and the four-way valve 150 and connected to the auxiliary heat exchanger 170 is provided with a solenoid valve 181 that is selectively opened to control the inflow of the refrigerant.

이때, 실외 열교환기(130)와 팽창기구(140) 사이의 배관과 보조 열교환 기(170)를 연결한 바이패스 배관(180)에는 실외 열교환기(130)를 통과한 냉매가 보조 열교환기(170) 측으로 유입되지 않도록 체크 밸브(182)를 설치하는 것이 바람직하다.At this time, in the bypass pipe 180 connecting the pipe between the outdoor heat exchanger 130 and the expansion mechanism 140 and the auxiliary heat exchanger 170, the refrigerant passing through the outdoor heat exchanger 130 is the auxiliary heat exchanger 170. It is preferable to install the check valve 182 so that it does not flow to the side.

한편, 도 3은 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 보조 열교환기가 설치된 실내 열교환기 본체를 도시한 도면으로서, 도시된 바와 같이, 실내 열교환기 본체(200) 내부에는 실내 열교환기(120) 및 보조 열교환기(170)가 수용된다.Meanwhile, FIG. 3 is a view illustrating an indoor heat exchanger main body in which an auxiliary heat exchanger of a heat pump air conditioner capable of continuous heating operation according to the present invention is installed. As illustrated, indoor heat exchanger is performed inside an indoor heat exchanger main body 200. Machine 120 and auxiliary heat exchanger 170 are housed.

또한, 실내 열교환기 본체(200) 내부를 보면, 실내 열교환기(120) 및 보조 열교환기(170) 사이에 구획판(210)이 설치되어 실내 열교환기(120) 및 보조 열교환기(170)가 서로 구획되어 본체(200) 내부에 수용되도록 한다.In addition, when looking at the interior of the indoor heat exchanger main body 200, the partition plate 210 is installed between the indoor heat exchanger 120 and the auxiliary heat exchanger 170, the indoor heat exchanger 120 and the auxiliary heat exchanger 170 is Partitioned to each other to be accommodated in the main body 200.

즉, 실내 열교환기(120) 내부를 유동하는 냉매가 보조 열교환기(170)에 영향을 미치지 않도록 하여, 제상운전시, 보조 열교환기(170)를 통해 실내 난방운전을 수행할 수 있다.That is, the refrigerant flowing in the indoor heat exchanger 120 does not affect the auxiliary heat exchanger 170, so that during the defrosting operation, the indoor heating operation may be performed through the auxiliary heat exchanger 170.

이하, 첨부된 도면을 참조하여 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 작용 및 효과를 설명한다.Hereinafter, with reference to the accompanying drawings will be described the operation and effect of the heat pump air conditioner capable of continuous heating operation according to the present invention.

먼저, 겨울철 난방운전이 수행되면, 압축기(110)로부터 토출되는 고온고압의 냉매는 사방밸브(150)를 거쳐 실내 열교환기(120)를 통과하면서 외부 공기와 열교환되어 실내가 난방되도록 하고, 이후 팽창기구(140)를 통해 감압 팽창된다.First, when the winter heating operation is performed, the high temperature and high pressure refrigerant discharged from the compressor 110 is heat exchanged with the outside air while passing through the indoor heat exchanger 120 through the four-way valve 150 to heat the room, and then expands Decompression expansion is carried out through the mechanism (140).

이어서, 이 냉매는 실외 열교환기(130)를 통해 실외 공기와 열교환되고, 이 후 어큐믈레이터(160)를 통해 액체상태의 냉매는 걸러지고, 기체상태의 냉매만이 압축기(110)로 유입된다.Subsequently, the refrigerant is heat-exchanged with the outdoor air through the outdoor heat exchanger 130, and then the refrigerant in the liquid state is filtered through the accumulator 160, and only the refrigerant in the gas state is introduced into the compressor 110. .

이때, 바이패스 배관(180)에 설치된 솔레노이드 밸브(181)는 폐쇄된 상태를 유지하여 보조 열교환기(170) 측으로 냉매가 유입되지 않도록 한다.At this time, the solenoid valve 181 installed in the bypass pipe 180 maintains the closed state to prevent the refrigerant from flowing into the auxiliary heat exchanger 170.

한편, 실외온도가 설정온도 이하로 하강되어 실외 열교환기(130)에 착상이 진행되었다고 판단되면, 제상운전을 수행하게 된다.On the other hand, if it is determined that the outdoor temperature is lowered below the set temperature and the implantation of the outdoor heat exchanger 130, defrosting operation is performed.

제상운전이 수행되면, 사방밸브(150)가 절환되어 상술한 난방운전시의 냉매 흐름과는 반대방향으로 냉매가 흐르게 된다.When the defrosting operation is performed, the four-way valve 150 is switched so that the refrigerant flows in a direction opposite to the refrigerant flow in the above-described heating operation.

즉, 압축기(110)로부터 토출된 고온고압의 냉매는 사방밸브(150)를 거쳐 실외 열교환기(130)로 유입됨으로써, 실외 열교환기(130)에 착상된 성에를 제거하게 된다.That is, the high temperature and high pressure refrigerant discharged from the compressor 110 flows into the outdoor heat exchanger 130 via the four-way valve 150, thereby removing frost formed on the outdoor heat exchanger 130.

이어서, 이 냉매는 팽창기구(140)를 거쳐 실내 열교환기(120)로 유입된 후, 어큐믈레이터(160)를 통해 액냉매가 걸러진 후, 압축기(110)로 흡입된다.Subsequently, the refrigerant flows into the indoor heat exchanger 120 through the expansion mechanism 140, and after the liquid refrigerant is filtered through the accumulator 160, is sucked into the compressor 110.

이때, 바이패스 배관(180)에 설치된 솔레노이드 밸브(181)는 제상운전이 수행됨과 동시에 개방되어 압축기(110)로부터 토출된 냉매 중 일부가 바이패스 배관(180)을 통해 보조 열교환기(170)로 유입되도록 한다.At this time, the solenoid valve 181 installed in the bypass pipe 180 is opened at the same time as the defrosting operation is performed so that some of the refrigerant discharged from the compressor 110 passes through the bypass pipe 180 to the auxiliary heat exchanger 170. Allow inflow.

여기서, 실내 열교환기(120) 측에 설치된 송풍팬(121)은 정지되고, 보조 열교환기(170) 측에 설치된 송풍팬(171)은 작동되어 실내 열교환기(120)에서 생성되는 냉기는 실내측으로 유입되지 않고, 보조 열교환기(170)에서 생성된 열기가 실내측으로 유입되어 실내가 난방된다.Here, the blower fan 121 installed at the indoor heat exchanger 120 side is stopped, and the blower fan 171 installed at the side of the auxiliary heat exchanger 170 is operated so that the cool air generated at the indoor heat exchanger 120 is moved to the indoor side. The heat generated in the auxiliary heat exchanger 170 is introduced into the indoor side without being introduced, and the indoor is heated.

또한, 보조 열교환기(170)와 실내 열교환기(120)는 실내 열교환기 본체(200) 내부에 같이 수용되어 있기는 하지만, 구획판(210)에 의해 서로 별도의 공간으로 구획되어 있어, 실내 열교환기(120)에서 생성되는 냉기가 보조 열교환기(170)에 미치는 영향이 최소화된다.In addition, although the auxiliary heat exchanger 170 and the indoor heat exchanger 120 are accommodated together inside the indoor heat exchanger main body 200, they are partitioned into separate spaces from each other by the partition plate 210, and thus indoor heat exchanger. The effect of cold air generated in the air 120 on the auxiliary heat exchanger 170 is minimized.

이와 같이, 본 발명은 겨울철 제상운전을 수행하는 경우, 사방밸브(150)를 절환하여 냉방 싸이클이 순환되어도, 보조 열교환기(170)를 통해 실내의 난방을 지속적으로 유지할 수 있게 된다.As described above, when the winter defrosting operation is performed, even if the cooling cycle is circulated by switching the four-way valve 150, the present invention can continuously maintain the heating of the room through the auxiliary heat exchanger 170.

도 1은 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 난방운전시의 냉매 회로도를 도시한 도면,1 is a view showing a refrigerant circuit diagram during heating operation of a heat pump air conditioner capable of continuous heating operation according to the present invention,

도 2는 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 제상운전시 냉매 회로도를 도시한 도면,2 is a view showing a refrigerant circuit diagram during the defrost operation of the heat pump air conditioner capable of continuous heating operation according to the present invention,

도 3은 본 발명에 따른 지속적인 난방운전이 가능한 히트펌프 공기조화기의 보조 열교환기가 설치된 실내 열교환기 본체를 도시한 도면.3 is a view showing an indoor heat exchanger main body in which an auxiliary heat exchanger of a heat pump air conditioner capable of continuously heating operation according to the present invention;

(도면의 부호에 대한 설명)(Description of symbols in the drawings)

110: 압축기 120: 실내 열교환기110: compressor 120: indoor heat exchanger

130: 실외 열교환기 140: 팽창기구130: outdoor heat exchanger 140: expansion mechanism

150: 사방밸브 160: 어큐믈레이터150: four-way valve 160: accumulator

170: 보조 열교환기 180: 바이패스 배관170: auxiliary heat exchanger 180: bypass piping

181: 솔레노이드 밸브 182: 체크 밸브181: solenoid valve 182: check valve

200: 실내 열교환기 본체 210: 구획판200: indoor heat exchanger body 210: partition plate

Claims (4)

흡입되는 냉매를 고온고압으로 압축하여 토출하는 압축기;A compressor for compressing and discharging the sucked refrigerant at high temperature and high pressure; 상기 압축기와 배관으로 연결되어 공기와 열교환하는 실외열교환기 및 실내열교환기;An outdoor heat exchanger and an indoor heat exchanger connected to the compressor and a pipe to exchange heat with air; 상기 실내열교환기와 실외열교환기 사이에 연결되어 어느 일측에서 이송되어 오는 냉매를 감압하는 팽창기구;An expansion mechanism connected between the indoor heat exchanger and the outdoor heat exchanger to depressurize the refrigerant transferred from one side; 상기 압축기로부터 토출되는 냉매 흐름을 바꾸도록 절환되는 사방밸브;A four-way valve switched to change a refrigerant flow discharged from the compressor; 기체상태의 냉매가 상기 압축기로 제공되도록 상기 사방밸브와 상기 압축기 사이에 구비되는 어큐뮬레이터;An accumulator provided between the four-way valve and the compressor to provide a gaseous refrigerant to the compressor; 제상 운전시, 상기 압축기로부터 토출되는 냉매 중 일부가 유입되어 실내 공기와 열교환하는 보조 열교환기; 및An auxiliary heat exchanger in which some of the refrigerant discharged from the compressor flows in during defrost operation and heat-exchanges with indoor air; And 제상 운전시, 상기 압축기로부터 토출되는 냉매 중 일부가 상기 보조 열교환기로 유입되도록 하는 바이패스 수단을 포함하는 것을 특징으로 하는 지속적인 난방 운전이 가능한 히트펌프 공기조화기.And a bypass means for allowing a part of the refrigerant discharged from the compressor to flow into the auxiliary heat exchanger during the defrosting operation. 제 1항에 있어서,The method of claim 1, 상기 바이패스 수단은 상기 압축기로부터 토출되는 냉매가 상기 보조 열교환기를 지나 상기 팽창기구 측으로 유입되도록 연결한 바이패스 배관 및 상기 바이패스 배관을 선택적으로 개방하는 솔레노이드 밸브를 포함하는 것을 특징으로 하는 지속적인 난방운전이 가능한 히트펌프 공기조화기.The bypass means includes a bypass pipe connecting the refrigerant discharged from the compressor to the expansion mechanism side through the auxiliary heat exchanger and a solenoid valve for selectively opening the bypass pipe. This heat pump air conditioner is available. 제 1항 또는 제 2항에 있어서,The method according to claim 1 or 2, 상기 실외 열교환기를 통과한 냉매가 상기 보조 열교환기로 유입되지 않도록 상기 바이패스 배관에 체크 밸브를 설치한 것을 특징으로 하는 지속적인 난방운전이 가능한 히트펌프 공기조화기.And a check valve is installed in the bypass pipe so that refrigerant passing through the outdoor heat exchanger does not flow into the auxiliary heat exchanger. 제 3항에 있어서,The method of claim 3, wherein 상기 보조 열교환기는 상기 실내 열교환기의 본체 내부에 상기 실내 열교환기와 구획되도록 설치한 것을 특징으로 하는 지속적인 난방운전이 가능한 히트펌프 공기조화기.The auxiliary heat exchanger is heat pump air conditioner capable of continuous heating operation, characterized in that installed in the main body of the indoor heat exchanger partitioned with the indoor heat exchanger.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101404554B1 (en) * 2011-09-09 2014-06-11 김홍운 an air conditioner with air-cooled heat exchange
CN106274372A (en) * 2016-11-14 2017-01-04 吉林大学 There is the heat-pump-type air conditioning for automobiles of battery thermal management function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101404554B1 (en) * 2011-09-09 2014-06-11 김홍운 an air conditioner with air-cooled heat exchange
CN106274372A (en) * 2016-11-14 2017-01-04 吉林大学 There is the heat-pump-type air conditioning for automobiles of battery thermal management function

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