KR20070064908A - Air conditioner and driving method thereof - Google Patents

Air conditioner and driving method thereof Download PDF

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Publication number
KR20070064908A
KR20070064908A KR1020050125509A KR20050125509A KR20070064908A KR 20070064908 A KR20070064908 A KR 20070064908A KR 1020050125509 A KR1020050125509 A KR 1020050125509A KR 20050125509 A KR20050125509 A KR 20050125509A KR 20070064908 A KR20070064908 A KR 20070064908A
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South Korea
Prior art keywords
heating operation
discharge temperature
compressor
temperature
air conditioner
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KR1020050125509A
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Korean (ko)
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이준표
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삼성전자주식회사
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Priority to KR1020050125509A priority Critical patent/KR20070064908A/en
Publication of KR20070064908A publication Critical patent/KR20070064908A/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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2103—Temperatures near a heat exchanger
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

An air conditioner and a driving method thereof are provided to control an opening angle of an electronic expanding valve differently according to a discharge temperature of a compressor for improving efficiency of a heating operation. A driving method of an air conditioner includes the steps of performing a heating operation of the air conditioner(S310), detecting a temperature of an outdoor heat exchanger before performing a defrost operation(S320), performing the defrost operation by being changed into a refrigerating operation when conditions of the defrost operation are met(S330), determining termination of the defrost operation by detecting the temperature of the outdoor heat exchanger during the defrost operation(S340), comparing a discharge temperature of a compressor with a reference value for determining a start of the heating operation(S350), performing the heating operation by opening an electronic expansion valve with an opening angle smaller than a preset opening angle if the discharge temperature is lower than the reference value(S360), checking whether an optimum time for increasing the discharge temperature larger than the reference value is passed(S380), and controlling the opening angle smaller if a target discharge temperature is high, and larger if the target discharge temperature is low(S370).

Description

공기조화기 및 그 운전방법{Air Conditioner and Driving Method Thereof}Air Conditioner and Driving Method {Air Conditioner and Driving Method Thereof}

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 수행시의 제어흐름도.Figure 3 is a control flow diagram when performing defrosting operation according to the present invention.

도 4는 본 발명에 따른 제상운전 후 난방운전의 수행시의 전자팽창밸브의 개도를 나타내는 도면.4 is a view showing the opening degree of the electromagnetic expansion valve at the time of performing the heating operation after the defrosting operation according to the present invention.

*도면의 주요부분에 대한 부호 설명** Description of symbols on the main parts of the drawings *

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 온도센서 32 : 압축기 토출측 온도센서30: outdoor temperature sensor 32: compressor discharge temperature sensor

본 발명은 공기조화기 및 그 운전방법에 관한 것으로, 더욱 상세하게는 제상운전을 종료 후 난방운전으로 전환시에 압축기의 토출온도에 따라 전자팽창밸브의 개도제어를 달리하여 난방운전을 빠르게 회복시켜 난방운전의 효율성을 향상시킨 공기조화기 및 그 운전방법에 관한 것이다.The present invention relates to an air conditioner and a method of operating the same, and more particularly, after the defrosting operation is switched to the heating operation, by varying the opening degree control of the electromagnetic expansion valve according to the discharge temperature of the compressor to restore the heating operation quickly. The present invention relates to an air conditioner and an operation method of improving the efficiency of heating operation.

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 마치고 난방운전으로 전환시 에 난방능력의 회복을 위해 압축기의 토출온도가 증가하도록 전자팽창밸브의 개도를 일정값 이하로 일정시간 동안 강제로 유지하도록 제어하였다. 따라서 압축기의 토출온도가 일정온도 이상인 경우에도 일정시간 동안 개도를 설정치 이하로 유지하여 난방능력을 회복하는데 시간이 많이 소요되는 문제점이 있다. Conventionally, as shown in FIG. 2, when the defrosting operation is completed and the heating operation is switched, the opening degree of the electromagnetic expansion valve is forcibly maintained for a predetermined time or less for a predetermined time so that the discharge temperature of the compressor is increased to restore the heating capacity. It was. Therefore, even when the discharge temperature of the compressor is above a certain temperature, there is a problem that it takes a long time to recover the heating capacity by maintaining the opening degree below a set value for a predetermined time.

본 발명은 전술한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 제상운전을 종료 후 난방운전으로 전환시에 난방능력을 빠르게 회복시켜 난방운전의 효율성을 향상시킨 공기조화기 및 그 운전방법을 제공함에 있다.The present invention is to solve the above problems, an object of the present invention is to provide an air conditioner and its operation method to improve the efficiency of heating operation by quickly recovering the heating capacity when switching to heating operation after the defrosting operation. Is in.

전술한 목적을 달성하기 위한 본 발명이 공기조화기는 압축기와, 실외측 열교환기와, 상기 압축기의 토출온도 및 상기 실외측 열교환기의 온도를 각각 검출하는 온도센서와, 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브와, 상기 실외측 열교환기의 온도를 이용하여 제상운전의 종료여부를 판단하고 제상운전의 종료시 상기 압축기의 토출온도에 따라 난방운전으로 전환시에 전자팽창밸브의 개도를 달리하여 난방운전을 수행하도록 제어하는 제어부를 포함한다.According to an aspect of the present invention, an air conditioner includes a compressor, an outdoor side heat exchanger, a temperature sensor for detecting a discharge temperature of the compressor, and a temperature of the outdoor side heat exchanger, and an outdoor unit for controlling a circulating refrigerant flow rate. It is judged whether the defrosting operation is finished by using the electromagnetic expansion valve provided in the refrigerant pipe on the side and the temperature of the outdoor heat exchanger, and when the switching to the heating operation is performed according to the discharge temperature of the compressor at the end of the defrosting operation. It includes a control unit for controlling to perform the heating operation by varying the opening degree.

또한, 상기 난방운전의 수행에 있어서, 상기 제어부는 상기 압축기의 토출온도를 기준값과 비교하여 상기 토출온도가 기준값 이상인 경우 상기 전자팽창밸브의 개도를 압축기의 토출온도에 추종하여 조절하는 안전상태 난방운전모드로 제어하는 것을 특징으로 한다.Further, in performing the heating operation, the controller compares the discharge temperature of the compressor with a reference value and controls the opening degree of the electromagnetic expansion valve to follow the discharge temperature of the compressor when the discharge temperature is higher than the reference value. The mode is characterized in that the control.

또한, 상기 난방운전의 수행에 있어서, 상기 제어부는 상기 압축기의 토출온도를 기준값과 비교하여 상기 토출온도가 기준값 미만인 경우 미리 설정된 일정개도로 개방하는 기동초기 난방운전모드로 제어하는 것을 특징으로 한다.In the heating operation, the control unit compares the discharge temperature of the compressor with a reference value, and when the discharge temperature is less than the reference value, the controller controls the start-up heating operation mode to be opened in a predetermined predetermined degree.

또한, 상기 난방운전의 수행에 있어서, 상기 제어부는 일정시간동안 상기 기동초기 난방운전모드로 운전한 후 상기 안전상태 난방운전모드로 전환하는 것을 특징으로 한다.In addition, in performing the heating operation, the control unit is characterized in that after switching to the safe state heating operation mode after driving in the initial initial heating operation mode for a predetermined time.

전술한 목적을 달성하기 위한 본 발명이 공기조화기의 운전방법은 외측 열교환기의 온도를 이용하여 제상운전의 종료여부를 판단하는 단계; 상기 판단결과 제상운전을 종료하고 난방운전으로 전환하는 경우 압축기의 토출온도를 기준값과 비교하는 단계; 상기 비교결과에 따라 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브의 개도를 달리하여 난방운전을 수행한다.According to an aspect of the present invention, there is provided a method of operating an air conditioner, including: determining whether defrosting is terminated using a temperature of an outer heat exchanger; Comparing the discharge temperature of the compressor with a reference value when the defrosting operation is terminated and the heating operation is switched as a result of the determination; According to the comparison result, the heating operation is performed by varying the opening degree of the electromagnetic expansion valve provided in the outdoor refrigerant pipe in order to control the circulation refrigerant flow rate.

또한, 상기 난방운전 수행하는 단계는 상기 비교단계에서의 비교결과 상기 토출온도가 기준값 이상인 경우 상기 전자팽창밸브의 개도를 압축기의 토출온도에 추종하여 조절하는 안전상태 난방운전모드로 난방운전을 수행하는 것을 특징으로 한다.In the performing of the heating operation, the heating operation may be performed in a safe state heating operation mode in which the opening degree of the electromagnetic expansion valve is adjusted to the discharge temperature of the compressor when the discharge temperature is greater than or equal to the reference value. It is characterized by.

또한, 상기 난방운전 수행하는 단계는 상기 비교단계에서의 비교결과 상기 토출온도가 기준값 미만인 경우 상기 전자팽창밸브를 미리 설정된 일정개도로 개방하는 기동초기 난방운전모드로 난방운전을 수행하는 것을 특징으로 한다.In the performing of the heating operation, the heating operation may be performed in a starting initial heating operation mode in which the electronic expansion valve is opened to a predetermined predetermined degree when the discharge temperature is less than a reference value in the comparison step. .

또한, 미리 설정된 일정시간동안 상기 기동초기 난방운전모드로 난방운전을 수행한 후 상기 안전상태 난방운전모드로 전환하여 난방운전을 수행하는 것을 특징 으로 한다.The heating operation may be performed by switching to the safe state heating operation mode after performing heating operation in the initial initial heating operation mode for a predetermined time.

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)과 실외측 온도센서(30) 및 압축기 토출측 온도센서(32)를 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 heat exchanger, an accumulator 20, an electromagnetic expansion valve 24, a bypass pipe 22, And an outdoor temperature sensor 30 and a compressor discharge side temperature sensor 32. 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 된다. 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.

제상운전을 도 2의 타임차트를 참조하여 설명하면 제상운전의 필요성을 판단하는 제1구간과 제상운전을 수행하는 제2구간과 제상운전을 마치고 다시 난방운전 을 수행하는 제3구간으로 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. 제2구간의 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 있어 제상운전의 수행구간(B구간)의 전후에 휴지구간(A, C구간)을 둔다. 제상운전구간(B구간)에서는 냉매의 급격한 유동방지 및 제상효율을 높이기 위해 휴지구간(A, C구간)의 개도(b)보다 더 큰 개도(c)로 전자팽창밸브(24)를 개방한다. 또한, 실내팬은 제상운전을 수행하는 동안 및 난방운전으로 전환된 후 실내측 열교환기(28)가 일정온도에 도달하기 전까지는 구동을 정지하여 실내로 차가운 공기가 토출되는 것을 방지한다. C구간에서 난방운전으로 전환 전에 공조사이클 상의 압평형을 위해 전자팽창밸브(24)의 개도를 잠시 c상태로 개방한다. When the defrosting operation is described with reference to the time chart of FIG. 2, the defrosting operation 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 is performed. 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. The defrosting operation of the second section is to turn off the power applied to the four-way valve to switch to the cooling operation to melt the water formed by using the heat generated by the condensation of the high temperature and high pressure refrigerant discharged from the compressor 18. . The defrosting operation is performed through the cooling operation. Therefore, as the 4-way valve is switched during the heating operation, the cooling system may become unstable due to the rapid flow of the refrigerant, so that before and after the execution section (section B) of the defrosting operation. Leave idle sections (A and C sections). In the defrosting operation section (section B), the electromagnetic expansion valve 24 is opened at an opening degree (c) larger than the opening degree (b) of the resting sections (A, C sections) in order to prevent rapid flow of the refrigerant and increase the defrosting efficiency. 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. Before switching to the heating operation in section C, the opening degree of the electromagnetic expansion valve 24 is briefly opened in the c state for pressure balance on the air conditioning cycle.

도 3은 본 발명에 따른 제상운전 수행시의 제어흐름도이다. 사용자의 조작 등에 의해 공기조화기의 난방운전을 수행한다.(S310단계) 난방운전의 수행 중 앞서 언급한 바와 같이 실외측 열교환기(16) 등의 온도를 측정하여 제상운전의 수행여부를 판단한다.(S320단계) 제상운전조건을 충족하는 경우 냉방운전으로 전환하여 제 상운전을 수행한다.(S330단계) 제상운전의 수행 중 실외측 열교환기(16) 등의 온도를 측정하여 제상운전을 종료할 것인지를 판단한다.(S330단계) 제상운전의 종료여부는 제상운전의 수행여부판단과 연결되는 것으로 제상운전의 수행조건과 반대의 경우를 말한다. 제상운전의 종료조건을 만족하는 경우 난방운전으로 전환되게 되는데 본 발명에서는 압축기(18)의 토출온도(Td)를 기준값(Tc)와 비교하여 난방운전시의 전자팽창밸브(EEV)(24)의 개도를 달리 제어한다.(S350단계) 즉, 압축기의 토출온도(Td)가 기준값(Tc)보다 작은 경우 기동초기상태로 난방운전을 수행하게 되는데 기동초기에 압축기(18)의 토출온도를 빠르게 상승시키기 위해 전자팽창밸브(EEV)(24)의 개도를 미리 설정된 일정개도(e)이하로 개방하여 난방운전을 수행한다.(S360단계) 이러한 기동초기상태로 일정시간(T) 난방운전을 수행하게 되면 압축기(18)의 토출온도(Td)가 기준값(Tc) 이상이 되게 되는데 일정시간(T)은 실험에 의해 최적의 값으로 설정된다.(S380단계) 이렇게 기동초기상태로 일정시간(T)동안 난방운전을 수행하거나 S350단계에서 압축기(18)의 토출온도(Td)가 기준값(Tc)이상인 경우 공조사이클이 안정된 상태이므로 공조부하에 따라 산출되는 압축기(18)의 목표 토출온도에 추종하여 전자팽창밸브(EEV)(24)의 개도를 조절한다. 즉, 목표 토출온도가 높을 경우 개도를 작게하고 낮을 경우 개도를 크게 조절한다.(S370단계) 3 is a control flowchart of the defrosting operation according to the present invention. The heating operation of the air conditioner is performed by the user's operation. (Step S310) As described above, during the heating operation, the temperature of the outdoor heat exchanger 16 is measured to determine whether the defrosting operation is performed. (Step S320) When the defrosting operation condition is satisfied, the operation is switched to the cooling operation to perform the defrosting operation. (Step S330) The defrosting operation is finished by measuring the temperature of the outdoor heat exchanger 16 during the defrosting operation. (Step S330) Whether or not the defrosting operation is terminated is connected to the determination of whether the defrosting operation is performed. When the end condition of the defrosting operation is satisfied, the heating operation is switched. However, in the present invention, the discharge temperature Td of the compressor 18 is compared with the reference value Tc. If the discharge temperature (Td) of the compressor is smaller than the reference value (Tc), the heating operation is performed in the initial startup state. The discharge temperature of the compressor 18 is rapidly increased at the initial startup. In order to perform the heating operation by opening the opening degree of the electromagnetic expansion valve (EEV) 24 to a predetermined predetermined opening degree (e) or less in advance (step S360). When the discharge temperature Td of the compressor 18 becomes equal to or greater than the reference value Tc, the predetermined time T is set to an optimal value by experiment. (Step S380) In this manner, the predetermined time T in the initial startup state. During the heating operation or discharge temperature of the compressor 18 in step S350 When the degree Td is greater than or equal to the reference value Tc, the air conditioning cycle is stable, and the opening degree of the electromagnetic expansion valve (EEV) 24 is adjusted by following the target discharge temperature of the compressor 18 calculated according to the air conditioning load. That is, when the target discharge temperature is high, the opening degree is decreased, and when the target discharge temperature is low, the opening degree is largely adjusted.

도 4는 본 발명에 따른 제상운전 후 난방운전의 수행시의 전자팽창밸브의 개도를 나타내는 도면이다. 도 4에는 압축기의 토출온도(Td)가 기준값(Tc)보다 작아 기동초기상태로 난방운전을 일정시간(T) 수행한 후 안전상태의 난방운전으로 전환되는 경우를 도시한 것이다. 이상에서 설명한 운전방법과 달리 기동초기상태의 난 방운전 중 일정시간(T)전 이라도 압축기의 토출온도(Td)가 기준값(Tc) 이상이 되는 경우 안전상태의 난방운전으로 전환하여 운전할 수도 있을 것이다. 4 is a view showing the opening degree of the electromagnetic expansion valve when the heating operation is performed after the defrosting operation according to the present invention. FIG. 4 illustrates a case in which the discharge temperature Td of the compressor is smaller than the reference value Tc and the heating operation is switched to a safe heating operation after the heating operation is performed for a predetermined time T in the initial startup state. Unlike the operation method described above, if the discharge temperature (Td) of the compressor is higher than the reference value (Tc) even before a predetermined time (T) during the warm-up operation of the start-up state may be switched to the safe operation of heating operation. .

이상에서 상세히 설명한 바와 같이, 본 발명은 제상운전의 종료시의 압축기의 토출온도에 따라 전자팽창밸브의 개도를 달리하여 제어함으로써 난방운전의 효율성을 높일 수 있는 효과가 있다.As described in detail above, the present invention has the effect of improving the efficiency of heating operation by controlling the opening degree of the electromagnetic expansion valve differently according to the discharge temperature of the compressor at the end of the defrosting operation.

또한, 제상운전시간이 단축됨에 따라 제상운전의 효율성을 향상시키고 쾌적한 난방을 제공할 수 있는 효과가 있다.In addition, as the defrosting operation time is shortened, there is an effect of improving the efficiency of defrosting operation and providing comfortable heating.

Claims (8)

압축기와, 실외측 열교환기와,Compressor, outdoor heat exchanger, 상기 압축기의 토출온도 및 상기 실외측 열교환기의 온도를 각각 검출하는 온도센서와,A temperature sensor for detecting a discharge temperature of the compressor and a temperature of the outdoor heat exchanger, respectively; 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브와,An electronic expansion valve provided in the outdoor refrigerant pipe to control the circulation refrigerant flow rate; 상기 실외측 열교환기의 온도를 이용하여 제상운전의 종료여부를 판단하고 제상운전의 종료시 상기 압축기의 토출온도에 따라 난방운전으로 전환시에 전자팽창밸브의 개도를 달리하여 난방운전을 수행하도록 제어하는 제어부를 포함하는 공기조화기.Determining whether the defrosting operation is terminated by using the temperature of the outdoor heat exchanger and controlling the heating operation to be performed by varying the opening degree of the electronic expansion valve when switching to the heating operation according to the discharge temperature of the compressor at the end of the defrosting operation. An air conditioner comprising a control unit. 제 1 항에 있어서, 상기 난방운전의 수행에 있어서,The method of claim 1, wherein in performing the heating operation, 상기 제어부는 상기 압축기의 토출온도를 기준값과 비교하여 상기 토출온도가 기준값 이상인 경우 상기 전자팽창밸브의 개도를 압축기의 토출온도에 추종하여 조절하는 안전상태 난방운전모드로 제어하는 것이 특징인 공기조화기. The control unit compares the discharge temperature of the compressor with a reference value, and when the discharge temperature is equal to or greater than the reference value, controls the air conditioner to control the opening degree of the electromagnetic expansion valve to a safe state heating operation mode that adjusts to the discharge temperature of the compressor. . 제 1 항에 있어서, 상기 난방운전의 수행에 있어서,The method of claim 1, wherein in performing the heating operation, 상기 제어부는 상기 압축기의 토출온도를 기준값과 비교하여 상기 토출온도가 기준값 미만인 경우 미리 설정된 일정개도로 개방하는 기동초기 난방운전모드로 제어하는 것이 특징인 공기조화기.The control unit compares the discharge temperature of the compressor with a reference value, the air conditioner characterized in that for controlling the opening initial heating operation mode to open in a predetermined predetermined opening when the discharge temperature is less than the reference value. 제 3 항에 있어서, 상기 난방운전의 수행에 있어서,The method of claim 3, wherein in performing the heating operation, 상기 제어부는 미리 설정된 일정시간동안 상기 기동초기 난방운전모드로 운전한 후 상기 안전상태 난방운전모드로 전환하는 것이 특징인 공기조화기.The controller operates in the initial heating operation mode for a predetermined time for a predetermined time, the air conditioner, characterized in that to switch to the safe state heating operation mode. 실외측 열교환기의 온도를 이용하여 제상운전의 종료여부를 판단하는 단계;Determining whether the defrosting operation is finished by using the temperature of the outdoor heat exchanger; 상기 판단결과 제상운전을 종료하고 난방운전으로 전환하는 경우 압축기의 토출온도를 기준값과 비교하는 단계;Comparing the discharge temperature of the compressor with a reference value when the defrosting operation is terminated and the heating operation is switched as a result of the determination; 상기 비교결과에 따라 순환냉매유량을 조절하기 위해 실외측 냉매배관에 마련되는 전자팽창밸브의 개도를 달리하여 난방운전을 수행하는 단계를 포함하는 공기조화기의 운전방법.And operating heating by varying the opening degree of the electronic expansion valve provided in the outdoor refrigerant pipe to adjust the circulation refrigerant flow rate according to the comparison result. 제 5 항에 있어서,The method of claim 5, 상기 난방운전 수행하는 단계는 상기 비교단계에서의 비교결과 상기 토출온도가 기준값 이상인 경우 상기 전자팽창밸브의 개도를 압축기의 토출온도에 추종하여 조절하는 안전상태 난방운전모드로 난방운전을 수행하는 것이 특징인 공기조화기의 운전방법.In the performing of the heating operation, the heating operation may be performed in a safe state heating operation mode in which the opening degree of the electromagnetic expansion valve is adjusted to the discharge temperature of the compressor when the discharge temperature is greater than or equal to the reference value. Method of air conditioner. 제 5 항에 있어서,The method of claim 5, 상기 난방운전 수행하는 단계는 상기 비교단계에서의 비교결과 상기 토출온 도가 기준값 미만인 경우 상기 전자팽창밸브를 미리 설정된 일정개도로 개방하는 기동초기 난방운전모드로 난방운전을 수행하는 것이 특징인 공기조화기의 운전방법.In the performing of the heating operation, when the discharge temperature is less than the reference value as a result of the comparison in the comparing step, the air conditioner performs heating operation in an initial initial heating operation mode which opens the electronic expansion valve to a predetermined predetermined opening degree. How to operate. 제 7 항에 있어서, The method of claim 7, wherein 미리 설정된 일정시간동안 상기 기동초기 난방운전모드로 난방운전을 수행한 후 상기 안전상태 난방운전모드로 전환하여 난방운전을 수행하는 것이 특징인 공기조화기의 운전방법.And a heating operation by switching to the safe state heating operation mode after performing a heating operation in the initial initial heating operation mode for a predetermined time.
KR1020050125509A 2005-12-19 2005-12-19 Air conditioner and driving method thereof KR20070064908A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106705352A (en) * 2016-11-25 2017-05-24 重庆美的通用制冷设备有限公司 Air conditioner and control method and device for electronic expansion valve in defrosting process of air conditioner
KR20170111092A (en) * 2016-03-25 2017-10-12 엘지전자 주식회사 An air conditioner and method for controlling it
CN114791151A (en) * 2022-05-16 2022-07-26 美的集团武汉暖通设备有限公司 Control method and device for electronic expansion valve of air conditioner, air conditioner and storage medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170111092A (en) * 2016-03-25 2017-10-12 엘지전자 주식회사 An air conditioner and method for controlling it
CN106705352A (en) * 2016-11-25 2017-05-24 重庆美的通用制冷设备有限公司 Air conditioner and control method and device for electronic expansion valve in defrosting process of air conditioner
CN106705352B (en) * 2016-11-25 2019-05-24 重庆美的通用制冷设备有限公司 The control method and device of electric expansion valve in a kind of air conditioner and its defrosting
CN114791151A (en) * 2022-05-16 2022-07-26 美的集团武汉暖通设备有限公司 Control method and device for electronic expansion valve of air conditioner, air conditioner and storage medium
CN114791151B (en) * 2022-05-16 2023-11-24 美的集团武汉暖通设备有限公司 Control method and device for electronic expansion valve of air conditioner, air conditioner and storage medium

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