KR101203995B1 - Air conditioner and Defrosting Driving Method thereof - Google Patents

Air conditioner and Defrosting Driving Method thereof Download PDF

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KR101203995B1
KR101203995B1 KR1020050134269A KR20050134269A KR101203995B1 KR 101203995 B1 KR101203995 B1 KR 101203995B1 KR 1020050134269 A KR1020050134269 A KR 1020050134269A KR 20050134269 A KR20050134269 A KR 20050134269A KR 101203995 B1 KR101203995 B1 KR 101203995B1
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defrosting operation
compressor
outdoor
heat exchanger
expansion valve
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KR1020050134269A
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Korean (ko)
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KR20070071093A (en
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하종권
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삼성전자주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/46—Component arrangements in separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

본 발명은 공기조화기 및 그 제상운전방법에 관한 것으로, 더욱 상세하게는 에 압축기를 구동상태로 유지하면서 제상운전을 실시하여 제상시간을 단축하고 쾌적한 난방을 제공하는 공기조화기 및 그 제상운전방법에 관한 것이다. 효율적인 제상운전을 수행하고 제상운전시간을 단축하기 위해 본 발명의 공기조화기는 압축기와, 실외측 열교환기와, 4웨이(way) 밸브와, 상기 실외측 열교환기의 온도를 감지하는 실외측 온도센서와, 상기 압축기의 토출배관과 흡입배관을 연결하는 바이패스관과, 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브와, 제상운전 수행시에 상기 압축기의 구동을 유지하면서 상기 바이패스관을 개방하고 상기 전자팽창밸브의 미리 설정된 개도로 개방하도록 제어하여 제상운전을 수행하는 제어부를 포함한다.The present invention relates to an air conditioner and a defrosting operation method thereof, and more particularly, an air conditioner and a defrosting operation method for shortening defrosting time and providing comfortable heating by performing defrosting operation while maintaining the compressor in a driving state. It is about. In order to perform an efficient defrosting operation and shorten the defrosting operation time, the air conditioner of the present invention includes a compressor, an outdoor side heat exchanger, a 4-way valve, and an outdoor side temperature sensor that senses the temperature of the outdoor heat exchanger. A bypass pipe connecting the discharge pipe and the suction pipe of the compressor, an electronic expansion valve provided in the outdoor refrigerant pipe to control the circulating refrigerant flow rate, and the bypass while maintaining the drive of the compressor during the defrosting operation. And a control unit which opens the pass pipe and controls the opening of the electromagnetic expansion valve to open at a predetermined opening degree.

Description

공기조화기 및 그 제상운전방법{Air conditioner and Defrosting Driving Method thereof}Air Conditioner and Defrosting Driving Method

도 1은 본 발명에 따른 공기조화기를 나타내는 개략도.1 is a schematic view showing an air conditioner according to the present invention.

도 2는 종래의 제상운전 수행시 공기조화기의 제어상태를 나타내는 타임 차트.2 is a time chart illustrating a control state of an air conditioner when performing a conventional defrosting operation.

도 3은 본 발명에 따른 제상운전 수행시 공기조화기의 제어상태를 나타내는 타임 차트.3 is a time chart illustrating a control state of an air conditioner when performing a defrosting operation according to the present invention.

*도면의 주요부분에 대한 부호 설명*Description of the Related Art [0002]

10 : 실외기 12 : 실내기10: outdoor unit 12: indoor unit

14 : 4way 밸브 16 : 실외측 열교환기14: 4-way valve 16: Outdoor side heat exchanger

18 : 압축기 24 : 전자팽창밸브18 Compressor 24 Electronic Expansion Valve

30 : 실외측 온도센서30: outdoor temperature sensor

본 발명은 공기조화기 및 그 제상운전방법에 관한 것으로, 더욱 상세하게는 에 압축기를 구동상태로 유지하면서 제상운전을 실시하여 제상시간을 단축하고 쾌 적한 난방을 제공하는 공기조화기 및 그 제상운전방법에 관한 것이다.The present invention relates to an air conditioner and a defrosting operation thereof, and more particularly, to an air conditioner and a defrosting operation for shortening the defrosting time and providing comfortable heating by performing a defrosting operation while maintaining the compressor in a driving state. It is about a method.

일반적으로, 공기조화기는 실내기, 실외기 및 그 사이를 순환하는 냉매를 포함하는 장치로서 냉매가 액화할 때 주위에 열을 방출하고 기화할 때 주변의 열을 흡수하는 성질을 이용하여 일정 공간을 냉방 또는 난방하는 장치를 말하는데 통상 실내기와 실외기로 분리 구성되고 실외기에는 압축기와 응축기가 실내기에는 팽창밸브와 증발기가 마련되는 것이 보통이다.In general, an air conditioner is a device including an indoor unit, an outdoor unit, and a refrigerant circulating therebetween, by using a property of releasing heat to the surroundings when the refrigerant liquefies and absorbing the surrounding heat when the refrigerant is liquefied, The heating device is usually composed of an indoor unit and an outdoor unit, and an outdoor unit is usually provided with a compressor and a condenser, and an indoor unit is provided with an expansion valve and an evaporator.

이러한 공기조화기는 압축기의 출구측에 4way 밸브를 마련하여 냉매의 흐름을 절환함으로써 냉방기능과 난방기능을 동시에 수행할 수 있다. 이러한 냉난방 기능을 수행하는 공기조화기를 히트펌프라고 하기도 한다.Such an air conditioner may provide a cooling function and a heating function at the same time by providing a 4-way valve on the outlet side of the compressor to switch the flow of the refrigerant. An air conditioner that performs this cooling and heating function is also called a heat pump.

여름에는 냉방기능을 수행하고 겨울에는 난방기능을 수행하는 히트펌프는 겨울철에 외부의 기온이 매우 낮거나 일정시간 난방을 수행하다보면 실외측 열교환기에 수분이 착상되어 실외공기와의 열교환이 원활하게 이루어지지 않는 문제점이 발생한다. 실외측 열교환기에 착상된 결빙을 제거하기 위해 제상운전을 실시하게 된다. 제상운전은 실외측 열교환기에서 착상된 결빙을 제거하기 위해 일정한 제상조건을 설정하고 이를 충족하는 경우 예컨대 실외측 열교환기의 배관온도가 실외온도보다 미리 설정된 온도이상 낮아지면 4웨이(way) 밸브를 전환하여 난방운전을 정지시키고, 대신에 냉방운전으로 전환시킴으로써 압축기로부터의 고온고압의 냉매를 실외측 열교환기로 유입시켜 실외측 열교환기에 착상된 결빙을 녹였다.Heat pump which performs cooling function in summer and heating function in winter, when the outside temperature is very low in winter or heating for a certain period of time, moisture is condensed on the outdoor heat exchanger, so heat exchange with outdoor air is smooth. The problem does not occur. The defrosting operation is performed to remove frost formed on the outdoor heat exchanger. The defrosting operation sets a certain defrosting condition to remove frost formed in the outdoor heat exchanger and, if it satisfies this, for example, if the piping temperature of the outdoor heat exchanger falls below the preset temperature than the outdoor temperature, the 4-way valve By switching to stop the heating operation, instead of switching to the cooling operation, the high-temperature, high-pressure refrigerant from the compressor was introduced into the outdoor heat exchanger to melt ice formed on the outdoor heat exchanger.

종래에는 도 2에 도시한 바와 같이 제상운전을 실시하기 위해서 4웨이(way) 밸브를 전환하여 생길 수 있는 급격한 냉매의 유동을 방지하기 위해 제상운전 전후 에(A, C구간) 압축기의 구동을 일정시간 정지하였다. 이 때문에 실제 제상운전을 위해 전후에 일정시간을 휴지기간을 갖게 되어 불필요한 시간의 낭비가 발생하는 문제점이 있다. Conventionally, the compressor is driven before and after defrosting (sections A and C) to prevent rapid flow of refrigerant, which may be caused by switching 4-way valves to perform defrosting as shown in FIG. Time stopped. For this reason, there is a problem in that unnecessary waste of time occurs because a certain period of time before and after the actual defrosting operation.

또한, 제상운전시간이 길어지게 되고 그 시간 동안에는 난방운전을 수행할 수 없게 되므로 사용자의 불편을 초래하는 문제점이 있다.In addition, the defrosting operation time is long and there is a problem that causes inconvenience to the user because the heating operation can not be performed during that time.

본 발명은 전술한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 압축기가 구동을 멈추는 단계없이 압축기의 구동상태를 유지하면서 제상운전을 실시하여 제상효율을 높이고 전체적인 제상시간을 단축할 수 있는 공기조화기 및 그 제상운전방법을 제공함에 있다.The present invention is to solve the above problems, an object of the present invention is to perform the defrost operation while maintaining the drive state of the compressor without stopping the compressor operation to increase the defrosting efficiency and shorten the overall defrost time To provide a machine and its defrosting operation.

전술한 목적을 달성하기 위한 본 발명의 공기조화기는 압축기와, 실외측 열교환기와, 4웨이(way) 밸브와, 상기 실외측 열교환기의 온도를 감지하는 실외측 온도센서와, 상기 압축기의 토출배관과 흡입배관을 연결하는 바이패스관과, 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브와, 제상운전 수행시에 상기 압축기의 구동을 유지하면서 상기 바이패스관을 개방하고 상기 전자팽창밸브의 미리 설정된 개도로 개방하도록 제어하여 제상운전을 수행하는 제어부를 포함한다.The air conditioner of the present invention for achieving the above object is a compressor, an outdoor side heat exchanger, a four-way valve, an outdoor side temperature sensor for sensing the temperature of the outdoor side heat exchanger, the discharge pipe of the compressor A bypass pipe connecting the suction pipe and the suction pipe, an electronic expansion valve provided in the outdoor refrigerant pipe to control the circulating refrigerant flow rate, and the bypass pipe being opened while maintaining the drive of the compressor during the defrosting operation. And a control unit configured to perform the defrosting operation by controlling the opening of the electromagnetic expansion valve to a predetermined opening degree.

또한, 상기 제어부는 상기 제상운전의 수행여부를 상기 실외측 온도센서에서 검출되는 상기 실외측 열교환기의 온도를 기준값과 비교하여 판단하는 것을 특징으로 한다.The controller may determine whether to perform the defrosting operation by comparing the temperature of the outdoor heat exchanger detected by the outdoor temperature sensor with a reference value.

또한, 상기 제어부는 상기 4웨이(way)밸브를 전환하여 냉방운전을 수행함으로써 상기 실외측 열교환기에서 발생하는 응축열을 이용하여 제상운전을 수행하는 것을 특징으로 한다.In addition, the control unit performs a defrosting operation by using the condensation heat generated from the outdoor heat exchanger by performing the cooling operation by switching the four-way valve.

또한, 상기 제어부는 제상운전을 수행하는 동안에는 상기 전자팽창밸브를 미리 설정된 개도로 일정하게 유지하는 것을 특징으로 한다.The control unit may maintain the electronic expansion valve at a predetermined opening degree while the defrosting operation is performed.

전술한 목적을 달성하기 위한 본 발명의 공기조화기의 제상운전방법은 실외측 열교환기의 온도를 이용하여 제상운전의 수행여부를 판단하는 단계; 상기 판단결과 제상운전을 수행하는 경우 압축기의 구동상태를 그대로 유지하면서 상기 압축기의 흡입배관과 토출배관을 연결하는 바이패스관을 개방하고 순환냉매유량을 조절하는 전자팽창밸브를 미리 설정된 개도로 개방하여 제상운전을 수행하는 단계; 상기 실외측 열교환기의 온도를 이용하여 제상운전의 종료여부를 판단하여 제상운전의 종료조건이 되는 경우 상기 바이패스관을 닫고 상기 전자팽창밸브를 난방운전시의 개도로 개방하여 난방운전을 수행하는 단계를 포함한다.Defrosting operation method of the air conditioner of the present invention for achieving the above object comprises the steps of performing the defrosting operation using the temperature of the outdoor side heat exchanger; As a result of the determination, when performing the defrosting operation, the bypass pipe connecting the suction pipe and the discharge pipe of the compressor is maintained while maintaining the driving state of the compressor, and the electronic expansion valve for controlling the circulating refrigerant flow rate is opened. Performing a defrosting operation; When the defrosting operation is terminated by determining whether the defrosting operation is terminated by using the temperature of the outdoor heat exchanger, the bypass pipe is closed and the electromagnetic expansion valve is opened to the opening degree during the heating operation to perform the heating operation. Steps.

또한, 상기 제상운전 수행단계에서 상기 압축기의 토출배관에 마련된 4웨이(way) 밸브를 전환하여 냉방운전을 수행함으로써 상기 실외측 열교환기에서 발생하는 응축열을 이용하여 제상운전을 수행하는 것을 특징으로 한다.In addition, the defrosting operation is performed by switching a 4-way valve provided in the discharge pipe of the compressor to perform a cooling operation to perform the defrosting operation using the heat of condensation generated in the outdoor heat exchanger. .

또한, 상기 제상운전 수행단계에서 제상운전을 수행하는 동안에는 상기 전자팽창밸브를 미리 설정된 개도로 일정하게 유지하는 것을 특징으로 한다.In addition, during the defrosting operation in the defrosting operation step, the electronic expansion valve is characterized in that it is kept constant in a predetermined opening degree.

이하에서는 본 발명의 바람직한 실시예를 본 도면을 참조하여 상세하게 설명하도록 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

도 1은 본 발명에 따른 공기조화기를 나타내는 개략도이다. 본 발명에 따른 공기조화기의 실외기(10)는 복수의 압축기(18)와 4웨이(way) 밸브와 실외측 열교환기와 어큐뮬레이터(20)와 전자팽창밸브(24)와 바이패스관(22) 및 실외측 온도센서(30)을 포함하여 구성된다. 실내기(12)에는 모세관(26)과 실내측 열교환기(28)를 포함하여 구성된다.1 is a schematic view showing an air conditioner according to the present invention. The outdoor unit 10 of the air conditioner according to the present invention includes a plurality of compressors 18, a 4-way valve, an outdoor side heat exchanger, an accumulator 20, an electromagnetic expansion valve 24, a bypass pipe 22, It is configured to include an outdoor side temperature sensor (30). The indoor unit 12 includes a capillary tube 26 and an indoor side heat exchanger 28.

이러한 구성에 의한 본 발명의 공기조화기의 동작을 이하에서 설명한다. 난방운전을 수행하는 경우 압축기(18)에서 토출되는 고온고압의 냉매가 실내측 열교환기(28)로 전달되고 실내공기와의 열교환을 마친 후 응축된 냉매는 전자팽창밸브(24)와 실외측 열교환기(16)를 통과하면서 실외공기와 열교환을 통해 증발되어 상온저압의 상태로 압축기(18)로 다시 유입된다. 이러한 순환을 통해 실외의 열을 실내로 공급하여 실내의 온도를 상승시킨다. 실외온도가 낮은 경우나 난방운전을 일정시간 이상 지속하는 경우 실외측 열교환기에 실외의 수분이 착상되어 결빙되게 된다. 이러한 결빙이 생기게 되면 실외공기와의 열교환이 원활히 이루어지지 못하여 난방효율이 떨어지는 문제가 발생하게 된다. 따라서 착상된 결빙을 녹이기 위한 제상운전을 수행하게 되는데 본 발명에 따른 제상운전을 도 3을 참조하여 이하에서 설명한다.The operation of the air conditioner of the present invention having such a configuration will be described below. When the heating operation is performed, the high temperature and high pressure refrigerant discharged from the compressor 18 is transferred to the indoor heat exchanger 28, and after the heat exchange with the indoor air, the condensed refrigerant exchanges heat with the electromagnetic expansion valve 24. While passing through the air (16) is evaporated through heat exchange with the outdoor air flows back into the compressor 18 in a state of low temperature at room temperature. Through this circulation, the outdoor temperature is supplied to the room to increase the temperature of the room. When the outdoor temperature is low or the heating operation is continued for a certain time, the outdoor water heats up in the outdoor heat exchanger and freezes. If such freezing occurs, heat exchange with outdoor air is not performed smoothly, causing a problem of low heating efficiency. Therefore, the defrosting operation for melting the frost formed is performed. The defrosting operation according to the present invention will be described below with reference to FIG. 3.

본 발명에 따른 제상운전방법은 제상운전의 필요성을 판단하는 제1구간과 제상운전을 수행하는 제2구간과 제상운전을 마치고 다시 난방운전을 수행하는 제3구 간으로 나뉜다. 제상운전의 필요성 판단은 여러 가지 방법이 있으나 실외측 열교환기 내지는 실외측 냉매배관의 온도를 측정하여 제상운전의 수행여부를 판단하는 것이 보통이다. 또는 난방운전시간이 일정시간 이상되는 경우 내지는 실외측 열교환기와 실외온도와의 차이가 일정값 이상 발생하면 제상운전을 수행한다. 이렇게 제상운전의 수행조건이 충족되면 제2구간의 제상운전을 수행하게 되는데 제상운전은 4웨이(way) 밸브에 인가되는 전원을 차단하여 냉방운전으로 전환하여 압축기(18)에서 토출되는 고온고압의 냉매가 응축하면서 발생하는 열을 이용하여 착상된 수분을 녹인다. 제상운전은 냉방운전을 통해 이루어지므로 난방운전 중 4웨이(way) 밸브를 전환함에 따라 냉매의 급격한 냉매의 유동에 의해 냉방시스템이 불안정하게 될 수 있다. 이 때문에 종래에는 제상운전의 전후(A, C구간)에 압축기(18)의 운전을 정지하는 휴지구간을 두어 사이클의 안정을 확보하였으나 이는 제상시간을 길게 하여 난방운전의 효율성이 떨어지는 문제가 있었다. The defrosting operation method according to the present invention is divided into a first section for determining the necessity of the defrosting operation, a second section for performing the defrosting operation and a third section for performing the heating operation again after the defrosting operation. There are various methods for determining the necessity of defrosting operation, but it is common to determine whether the defrosting operation is performed by measuring the temperature of the outdoor heat exchanger or the outdoor refrigerant pipe. Alternatively, if the heating operation time exceeds a predetermined time or if a difference between the outdoor side heat exchanger and the outdoor temperature is a predetermined value or more, the defrosting operation is performed. When the defrosting operation condition is satisfied, the defrosting operation of the second section is performed. The heat generated by condensation of the refrigerant is used to dissolve the formed moisture. Since the defrosting operation is performed through the cooling operation, the cooling system may become unstable due to the rapid flow of the refrigerant as the 4-way valve is switched during the heating operation. For this reason, in the related art, a rest period for stopping the operation of the compressor 18 is provided before and after the defrosting operation (sections A and C) to secure the cycle stability.

본 발명의 제상운전방법은 압축기(18)의 구동상태를 그대로 유지하고 4웨이(way) 밸브의 전환에 따른 냉매의 급격한 유동을 방지하기 위해 압축기(18)의 토출배관과 흡입배관 즉, 어큐뮬레이터(20)의 유입배관을 연결하는 바이패스관(22)를 개방하여 냉매의 일부를 바이패스하고 전자팽창밸브(24)의 개도를 난방운전시의 개도(a)보다 더 큰 개도(c) 또는 그 이상으로 개방하여 냉매의 유동을 완충시킨다. The defrosting operation method of the present invention is to maintain the operating state of the compressor 18 as it is and to prevent the rapid flow of the refrigerant due to the switching of the four-way valve discharge pipe and suction pipe of the compressor 18, that is, accumulator ( The bypass pipe 22 connecting the inlet pipe 20 is opened to bypass a part of the refrigerant, and the opening degree of the electromagnetic expansion valve 24 is larger than the opening degree a during heating operation c or its The above opening is performed to buffer the flow of the refrigerant.

이를 통해 사이클의 안정성을 확보함과 동시에 종래의 휴지구간(A, C구간)을 없애고 압축기(18)의 구동상태를 그대로 유지하면서 제상운전을 수행하여 제상시간을 크게 단축할 수 있게 된다. 바이패스관(22)은 제상운전을 수행하기 일정시간 전 에 개방하고 난방운전으로 전환된 후에도 일정시간동안 개방하여 압축기의 토출측과 실외배관 사이의 압평형 즉, 급격한 냉매의 유동을 완충시킨다. 또한, 실내팬은 제상운전을 수행하는 동안 및 난방운전으로 전환된 후 실내측 열교환기(28)가 일정온도에 도달하기 전까지는 구동을 정지하여 실내로 차가운 공기가 토출되는 것을 방지한다. 또한, 난방운전의 전환시에 전자팽창밸브의 개도를 작게 하여 실내측으로 공급되는 냉매의 온도가 빠르게 상승할 수 있도록 한다. This ensures stability of the cycle and at the same time eliminates the conventional rest periods (A, C section) and can perform a defrosting operation while maintaining the driving state of the compressor 18 as it is possible to significantly shorten the defrost time. The bypass pipe 22 opens before the defrosting operation is performed for a predetermined time and after switching to the heating operation to open for a predetermined time to buffer the pressure balance, that is, rapid flow of refrigerant between the discharge side of the compressor and the outdoor pipe. In addition, the indoor fan is stopped during the defrosting operation and after switching to the heating operation until the indoor heat exchanger 28 reaches a predetermined temperature to prevent the cool air from being discharged to the room. In addition, when the heating operation is switched, the opening degree of the electromagnetic expansion valve is made small so that the temperature of the refrigerant supplied to the indoor side can be quickly increased.

이상에서 상세히 설명한 바와 같이, 본 발명은 압축기의 구동상태를 유지하면서 제상운전을 수행할 수 있게 됨에 따라 제상운전시간을 크게 단축할 수 있는 효과가 있다.As described in detail above, the present invention can perform the defrosting operation while maintaining the driving state of the compressor has an effect that can greatly shorten the defrosting operation time.

또한, 빈번한 압축기의 온/오프운전을 피하게 되어 압축기의 신뢰성을 높일 수 있는 효과가 있다.In addition, frequent on / off operation of the compressor is avoided, thereby increasing the reliability of the compressor.

또한, 압축기의 연속운전으로 제상운전 종료 후 목표난방능력을 신속하게 확보할 수 있어 난방운전의 효율성을 높이는 효과가 있다.In addition, by the continuous operation of the compressor can be quickly ensured the target heating capacity after the defrosting operation has an effect of increasing the efficiency of the heating operation.

Claims (7)

압축기와, 실외측 열교환기와, 4웨이(way) 밸브와,Compressors, outdoor heat exchangers, 4-way valves, 상기 실외측 열교환기의 온도를 감지하는 실외측 온도센서와,An outdoor temperature sensor for sensing a temperature of the outdoor heat exchanger; 상기 압축기의 토출배관과 흡입배관을 연결하는 바이패스관과,A bypass pipe connecting the discharge pipe and the suction pipe of the compressor; 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브와,An electronic expansion valve provided in the outdoor refrigerant pipe to control the circulation refrigerant flow rate; 제상운전 수행시에 상기 4웨이(way) 밸브를 전환하고 상기 압축기의 구동을 유지하면서 상기 바이패스관을 개방하고 상기 전자팽창밸브의 미리 설정된 개도로 개방하도록 제어하여 제상운전을 수행하는 제어부를 포함하는 공기조화기.And a control unit which performs the defrosting operation by switching the four-way valve and controlling the compressor to open the bypass pipe and open the predetermined opening of the electromagnetic expansion valve when the defrosting operation is performed. Air conditioning. 제 1 항에 있어서,The method of claim 1, 상기 제어부는 상기 제상운전의 수행여부를 상기 실외측 온도센서에서 검출되는 상기 실외측 열교환기의 온도를 기준값과 비교하여 판단하는 것이 특징인 공기조화기.And the control unit determines whether to perform the defrosting operation by comparing the temperature of the outdoor heat exchanger detected by the outdoor temperature sensor with a reference value. 제 1 항에 있어서,The method of claim 1, 상기 제어부는 상기 4웨이(way)밸브를 전환하여 냉방운전을 수행함으로써 상기 실외측 열교환기에서 발생하는 응축열을 이용하여 제상운전을 수행하는 것이 특징인 공기조화기.The control unit performs a defrosting operation by using the condensation heat generated from the outdoor heat exchanger by performing a cooling operation by switching the four-way valve. 제 1 항에 있어서,The method of claim 1, 상기 제어부는 제상운전을 수행하는 동안에는 상기 전자팽창밸브를 미리 설정된 개도로 일정하게 유지하는 것이 특징인 공기조화기.And the control unit maintains the electromagnetic expansion valve at a predetermined opening degree while the defrosting operation is performed. 실외측 열교환기의 온도를 이용하여 제상운전의 수행여부를 판단하는 단계;Determining whether to perform a defrosting operation using a temperature of an outdoor heat exchanger; 상기 판단결과 제상운전을 수행하는 경우 압축기의 구동상태를 그대로 유지하면서 상기 압축기의 토출배관에 마련된 4웨이(way) 밸브를 전환하고 상기 압축기의 흡입배관과 토출배관을 연결하는 바이패스관을 개방하고 순환냉매유량을 조절하는 전자팽창밸브를 미리 설정된 개도로 개방하여 제상운전을 수행하는 단계;As a result of the determination, when performing the defrosting operation, the 4-way valve provided in the discharge pipe of the compressor is switched while maintaining the driving state of the compressor and the bypass pipe connecting the suction pipe and the discharge pipe of the compressor is opened. Performing a defrosting operation by opening the electronic expansion valve for controlling the circulating refrigerant flow rate in a predetermined opening degree; 상기 실외측 열교환기의 온도를 이용하여 제상운전의 종료여부를 판단하여 제상운전의 종료조건이 되는 경우 상기 바이패스관을 닫고 상기 전자팽창밸브를 난방운전시의 개도로 개방하여 난방운전을 수행하는 단계를 포함하는 공기조화기의 제상운전방법.When the defrosting operation is terminated by determining whether the defrosting operation is terminated by using the temperature of the outdoor heat exchanger, the bypass pipe is closed and the electromagnetic expansion valve is opened to the opening degree during the heating operation to perform the heating operation. Defrosting operation method of the air conditioner comprising the step. 제 5 항에 있어서,6. The method of claim 5, 상기 제상운전 수행단계에서 상기 압축기의 토출배관에 마련된 4웨이(way) 밸브를 전환하여 냉방운전을 수행함으로써 상기 실외측 열교환기에서 발생하는 응축열을 이용하여 제상운전을 수행하는 것이 특징인 공기조화기의 제상운전방법.In the defrosting operation step, by performing a cooling operation by switching the 4-way valve provided in the discharge pipe of the compressor by performing the defrosting operation using the heat of condensation generated in the outdoor heat exchanger Defrosting operation method. 제 5 항에 있어서,6. The method of claim 5, 상기 제상운전 수행단계에서 제상운전을 수행하는 동안에는 상기 전자팽창밸브를 미리 설정된 개도로 일정하게 유지하는 것이 특징인 공기조화기의 제상운전방법.The defrosting operation method of the air conditioner, characterized in that during the defrosting operation performing the defrosting operation step, the electronic expansion valve is kept constant in a predetermined opening degree.
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