KR100310361B1 - HVAC equipment and its control method - Google Patents
HVAC equipment and its control method Download PDFInfo
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- KR100310361B1 KR100310361B1 KR1019980028720A KR19980028720A KR100310361B1 KR 100310361 B1 KR100310361 B1 KR 100310361B1 KR 1019980028720 A KR1019980028720 A KR 1019980028720A KR 19980028720 A KR19980028720 A KR 19980028720A KR 100310361 B1 KR100310361 B1 KR 100310361B1
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- heat exchanger
- indoor heat
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- outdoor heat
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
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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
- 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
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2521—On-off valves controlled by pulse signals
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
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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
본 발명은, 상호 폐회로를 이루어 직렬연결되는 압축기, 실내열교환기 및 실외열교환기와, 상기 압축기로부터의 냉매를 냉방운전시에는 상기 실외열교환기에, 난방운전시에는 상기 실내열교환기에 선택적으로 전달하는 선택밸브와, 상기 실외열교환기와 상기 실내열교환기 사이에 순차적으로 직렬로 배치되는 제1모세관 및 제2모세관을 갖는 냉난방겸용 공조기기와 그 제어방법에 관한 것으로서, 상기 실내열교환기의 전열관온도를 감지하는 온도센서와; 상기 실외열교환기의 전체 전열관 길이내의 일지점과 상기 제2모세관 사이를 연결하는 바이패스배관과; 상기 바이패스배관상에 설치되는 전자밸브와; 상기 온도센서에 의한 감지온도에 따라 상기 전자밸브를 개방 및 폐쇄시키는 제어부를 포함하는 것을 특징으로 한다. 이에 의하여, 냉방저온 및 난방과부하가 발생되었을 때, 바이패스에 의해 실외열교환기의 열교환량을 조절함에 따라 실외열교환기측 송풍팬의 내구성을 향상시킬 수 있을 뿐만 아니라 전력소비를 감소시킬 수 있다.The present invention provides a compressor, an indoor heat exchanger and an outdoor heat exchanger connected in series in a closed circuit, and a selection valve for selectively transferring refrigerant from the compressor to the outdoor heat exchanger during cooling operation and to the indoor heat exchanger during heating operation. And a cooling and air conditioning unit having a first capillary tube and a second capillary tube sequentially arranged in series between the outdoor heat exchanger and the indoor heat exchanger, and a method of controlling the same, the temperature sensing the temperature of the heat exchanger tube of the indoor heat exchanger. A sensor; A bypass pipe connecting one point within the length of the entire heat pipe of the outdoor heat exchanger and the second capillary pipe; A solenoid valve installed on the bypass pipe; And a control unit for opening and closing the solenoid valve in accordance with the sensed temperature by the temperature sensor. As a result, when cooling low temperature and heating overload occur, by controlling the heat exchange amount of the outdoor heat exchanger by bypass, the durability of the blower fan of the outdoor heat exchanger side can be improved and power consumption can be reduced.
Description
본 발명은, 냉난방겸용 공조기기와 그 제어방법에 관한 것으로서, 보다 상세하게는, 냉방저온 및 난방과부하가 발생되었을 때, 바이패스에 의해 실외열교환기의 열교환량을 조절함에 따라 실외열교환기측 송풍팬의 내구성을 향상시킬 수 있을 뿐만 아니라 전력소비를 감소시킬 수 있도록 한 냉난방겸용 공조기기와 그 제어방법에 관한 것이다.The present invention relates to a combined air conditioning and air conditioning apparatus and a control method thereof, and more particularly, to control the heat exchange amount of an outdoor heat exchanger by a bypass when a cooling low temperature and a heating overload are generated. The present invention relates to an air conditioning and air conditioning system for controlling heating and reducing power consumption, as well as a control method thereof.
도 3은 종래의 냉난방겸용 공조기기의 냉매회로도이다. 이 도면에 도시된 바와 같이, 종래의 냉난방겸용 공조기기는 냉매를 압축하는 압축기(101)와, 냉매를 실외공기와 열교환시키는 실외열교환기(103)와, 냉매를 실내공기와 열교환시키는 실내열교환기(105)를 가진다.3 is a refrigerant circuit diagram of a conventional air conditioning and air conditioner. As shown in this figure, a conventional air-conditioning and air conditioning apparatus includes a compressor 101 for compressing a refrigerant, an outdoor heat exchanger 103 for exchanging refrigerant with outdoor air, and an indoor heat exchanger for exchanging refrigerant with indoor air. Have 105.
압축기(101)의 토출측에는 냉방 및 난방운전에 따라 압축기(101)에서 토출된 냉매를 실외열교환기(103) 및 실내열교환기(105)를 향해 선택적으로 전달하는 4방향전환밸브(107)가 설치되어 있다.On the discharge side of the compressor 101, four-way switching valves 107 are installed to selectively transfer the refrigerant discharged from the compressor 101 toward the outdoor heat exchanger 103 and the indoor heat exchanger 105 according to cooling and heating operations. It is.
실외열교환기(103)와 실내열교환기(105) 사이에는 제1모세관(109)과 제2모세관(111)이 직렬로 순차적으로 설치되어 있으며, 난방운전시 실내열교환기(105)에서 실외열교환기(103)로 향하는 냉매의 흐름을 저지하여 제2모세관(111)을 통과하도록 제2모세관(111)과 병렬로 체크밸브(113)가 설치되어 있다.The first capillary tube 109 and the second capillary tube 111 are installed in series between the outdoor heat exchanger 103 and the indoor heat exchanger 105 in sequence, and the outdoor heat exchanger from the indoor heat exchanger 105 during heating operation. A check valve 113 is provided in parallel with the second capillary tube 111 to block the flow of the refrigerant directed to 103 and pass through the second capillary tube 111.
또한, 실내열교환기(105)내에는 실내열교환기(105)를 지나는 전열관온도를 감지할 수 있도록 온도센서(117)가 설치되어 있으며, 실외열교환기(103) 및 실내열교환기(105)에는 실외공기 및 실내공기를 공급하는 실외기측 송풍팬(115)과 실내기측 송풍팬(미도시)이 설치되어 있다.In addition, the indoor heat exchanger 105 has a temperature sensor 117 is installed to detect the temperature of the heat pipe passing through the indoor heat exchanger 105, the outdoor heat exchanger 103 and the indoor heat exchanger 105 in the outdoor An outdoor unit blower fan 115 and an indoor unit blower fan (not shown) for supplying air and indoor air are provided.
이상과 같은 구성에 의하여, 냉방운전시에는 압축기(101)에서 토출된 냉매가 4방향전환밸브(107)를 지나 실외열교환기(103)에 유입된다. 실외열교환기(103)에 유입된 냉매는 실외기측 송풍팬(115)에 의해 실외열교환기(103)를 통과하는 실외공기와 열전달되어 응축되며, 응축된 냉매는 체크밸브(113)를 지나 제1모세관(109)을 통과하여 감압팽창된다. 제1모세관(109)을 지나면서 감압팽창된 냉매는 실내열교환기(105)에 유입되며, 실내열교환기(105)를 지나면서 실내기측 송풍팬에 의해 실내열교환기(105)를 통과하는 실내공기와 열전달되어 증발된다. 이러한, 냉매의 증발에 의해 실내공기가 냉각되어 실내를 냉방시킨다. 실내공기와 열전달되어 증발된 냉매는 4방향전환밸브(107)를 지나 압축기(101)에 유입된다.By the above configuration, during the cooling operation, the refrigerant discharged from the compressor 101 flows into the outdoor heat exchanger 103 through the four-way switching valve 107. The refrigerant introduced into the outdoor heat exchanger (103) is heat-transferred and condensed by the outdoor air passing through the outdoor heat exchanger (103) by the outdoor air blower fan (115), and the condensed refrigerant passes through the check valve (113) to the first. It expands under reduced pressure through the capillary tube (109). The refrigerant expanded under reduced pressure while passing through the first capillary tube (109) flows into the indoor heat exchanger (105), and passes through the indoor heat exchanger (105) and passes through the indoor heat exchanger (105) by a blower fan. And heat transfer to evaporate. The indoor air is cooled by the evaporation of the refrigerant to cool the room. The refrigerant evaporated by heat transfer to the indoor air flows into the compressor (101) through the four-way switching valve (107).
또한, 난방운전시에는 압축기(101)에서 압축된 냉매는 4방향전환밸브(107)를 지나 실내열교환기(105)로 유입된다. 실내열교환기(105)에 유입된 냉매는 실내열교환기(105)를 통과하는 실내공기와 열전달되어 실내공기에 열을 빼앗기게 되므로 실내를 난방시키며 냉매는 응축된다. 실내열교환기(105)에서 응축된 냉매는 제1모세관(109)을 지나면서 1차 감압팽창되며, 제2모세관(111)을 지나면서 2차 감압팽창되어 실외열교환기(103)로 유입된다. 실외열교환기(103)로 유입된 냉매는 실외열교환기(103)를 통과하는 실외공기와 열전달되어 증발되며, 증발된 냉매는 4방향전환밸브(107)를 지나 압축기(101)로 유입된다.In addition, during the heating operation, the refrigerant compressed by the compressor 101 flows into the indoor heat exchanger 105 through the four-way switching valve 107. The refrigerant introduced into the indoor heat exchanger 105 is transferred to the indoor air passing through the indoor heat exchanger 105 to lose heat to the indoor air, thereby heating the room and condensing the refrigerant. The refrigerant condensed in the indoor heat exchanger 105 is first expanded under reduced pressure while passing through the first capillary tube 109, and is secondly expanded under reduced pressure while passing through the second capillary tube 111 and introduced into the outdoor heat exchanger 103. The refrigerant introduced into the outdoor heat exchanger (103) is heat transferred to the outdoor air passing through the outdoor heat exchanger (103) and evaporated, and the evaporated refrigerant flows into the compressor (101) through the four-way switching valve (107).
한편, 냉방운전시 실외공기온도가 정상적인 냉방운전조건시보다 낮아 실외열교환기(103)를 통과한 냉매가 과냉됨에 따라 실내열교환기(105)에서 과도한 열전달에 의해 실내열교환기(105)가 동결되는 냉방저온이 발생할 경우, 실내열교환기(105)에 설치된 온도센서(117)에서 실내열교환기(105)의 전열관온도를 감지하여 소정의 온도값 이하이면 실외기측 송풍팬(115)을 정지시켜 실외열교환기(103)의 열전달량을 감소시킨다. 또한, 난방운전시 실외공기온도가 정상적인 난방운전시보다 높아 실외열교환기(103)를 통과한 냉매가 과열됨에 따라 시스템의 압력 및 온도가 상승하는 난방과부하가 발생할 경우, 실내열교환기(105)에 설치된 온도센서(117)에서 실내열교환기(105)의 전열관온도를 감지하여 소정의 온도값 이상이면 실외열교환기용 송풍팬을 정지시켜 실외열교환기(103)의 열교환량을 감소시킨다.On the other hand, the outdoor air temperature during the cooling operation is lower than the normal cooling operation conditions, the refrigerant passing through the outdoor heat exchanger 103 is overcooled, so that the indoor heat exchanger 105 is frozen by excessive heat transfer in the indoor heat exchanger 105. When cooling low temperature occurs, the temperature sensor 117 installed in the indoor heat exchanger 105 detects the temperature of the heat exchanger tube of the indoor heat exchanger 105 and stops the outdoor fan-side blower fan 115 when the temperature is lower than a predetermined temperature value. The heat transfer amount of the group 103 is reduced. In addition, when the heating air load is higher than the normal heating operation during the heating operation, the refrigerant passing through the outdoor heat exchanger 103 is overheated, so that the heating overload in which the pressure and temperature of the system rises, the indoor heat exchanger 105 The installed temperature sensor 117 detects the temperature of the heat exchanger tube of the indoor heat exchanger 105 and stops the blower fan for the outdoor heat exchanger if the temperature is equal to or greater than a predetermined temperature value, thereby reducing the heat exchange amount of the outdoor heat exchanger 103.
그런데, 이러한 종래의 냉난방겸용 공조기기에 있어서는, 냉방저온 및 난방과부하에 의해 실외기측 송풍팬의 정지 및 가동이 빈번하게 발생하면 전력소비가 커지게 되며, 송풍팬의 내구성이 떨어지는 문제점이 있다.By the way, in such a conventional air conditioning and air conditioning equipment, when the outdoor fan side cooling fan is frequently stopped and operated due to cooling low temperature and heating overload, power consumption increases, and the durability of the blowing fan is inferior.
따라서, 본 발명의 목적은, 냉방저온 및 난방과부하가 발생되었을 때, 바이패스에 의해 실외열교환기의 열교환량을 조절함에 따라 실외열교환기측 송풍팬의 내구성을 향상시킬 수 있을 뿐만 아니라 전력소비를 감소시킬 수 있는 냉난방겸용 공조기기와 그 제어방법을 제공하는 것이다.Accordingly, an object of the present invention is to improve the durability of the blower fan of the outdoor heat exchanger as well as reduce the power consumption by controlling the heat exchange amount of the outdoor heat exchanger by bypass when cooling low temperature and heating overload occur. It is to provide a cooling and heating air conditioning equipment that can be made and its control method.
도 1은 본 발명에 따른 냉난방겸용 공조기기의 냉매회로도,1 is a refrigerant circuit diagram of a combined air conditioning and heating device according to the present invention,
도 2는 본 발명에 따른 냉난방겸용 공조기기의 제어블럭도,2 is a control block diagram of an air conditioning and heating device according to the present invention,
도 3은 종래의 냉난방겸용 공조기기의 냉매회로도이다.3 is a refrigerant circuit diagram of a conventional air conditioning and air conditioner.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
1 : 압축기 3 : 실외열교환기1: compressor 3: outdoor heat exchanger
5 : 실내열교환기 7 : 4방향전환밸브5: indoor heat exchanger 7: 4 way switching valve
9 : 제1모세관 11 : 제2모세관9: capillary 1 11: capillary 2
13 : 체크밸브 15 : 실외기측 송풍팬13: check valve 15: blower fan for outdoor unit
17 : 온도센서 21 : 제어부17: temperature sensor 21: control unit
23 : 전자밸브23: solenoid valve
상기 목적은, 본 발명에 따라, 상호 폐회로를 이루어 직렬연결되는 압축기, 실내열교환기 및 실외열교환기와, 상기 압축기로부터의 냉매를 냉방운전시에는 상기 실외열교환기에, 난방운전시에는 상기 실내열교환기에 선택적으로 전달하는 선택밸브와, 상기 실외열교환기와 상기 실내열교환기 사이에 순차적으로 직렬로 배치되는 제1모세관 및 제2모세관을 갖는 냉난방겸용 공조기기에 있어서, 상기 실내열교환기의 전열관온도를 감지하는 온도센서와; 상기 실외열교환기의 전체 전열관 길이내의 일지점과 상기 제2모세관 사이를 연결하는 바이패스배관과; 상기 바이패스배관상에 설치되는 전자밸브와; 상기 온도센서에 의한 감지온도에 따라 상기 전자밸브를 개방 및 폐쇄시키는 제어부를 포함하는 것을 특징으로 하는 냉난방겸용 공조기기에 의해 달성된다.According to the present invention, a compressor, an indoor heat exchanger and an outdoor heat exchanger, which are connected in series in a closed circuit, and the refrigerant from the compressor are selectively provided to the outdoor heat exchanger during cooling operation and to the indoor heat exchanger during heating operation. In the air-conditioning and air conditioning equipment having a first valve and a second capillary disposed in series between the outdoor valve and the indoor heat exchanger in series, the temperature for detecting the heat pipe temperature of the indoor heat exchanger A sensor; A bypass pipe connecting one point within the length of the entire heat pipe of the outdoor heat exchanger and the second capillary pipe; A solenoid valve installed on the bypass pipe; It is achieved by a combined air conditioning and heating device comprising a control unit for opening and closing the solenoid valve in accordance with the sensed temperature by the temperature sensor.
여기서, 상기 제어부는, 난방운전시 상기 실내열교환기내의 전열관온도가 소정의 온도값이상일 때, 냉방운전시 상기 실내열교환기내의 전열관온도가 소정의 온도값이하일 때, 상기 전자밸브를 개방하는 것이 바람직하다.The control unit may open the solenoid valve when the temperature of the heat exchanger tube in the indoor heat exchanger is greater than or equal to a predetermined temperature value during heating operation and when the temperature of the heat exchanger tube in the indoor heat exchanger is less than a predetermined temperature value during cooling operation. Do.
또한, 본 발명의 다른 분야에 따르면, 상호 폐회로를 이루어 직렬연결되는 압축기, 실내열교환기 및 실외열교환기와, 상기 압축기로부터의 냉매를 냉방운전시에는 상기 실외열교환기에, 난방운전시에는 상기 실내열교환기에 선택적으로 전달하는 선택밸브와, 상기 실외열교환기와 상기 실내열교환기 사이에 순차적으로 직렬로 배치되는 제1모세관 및 제2모세관을 갖는 냉난방겸용 공조기기에 있어서, 상기 실내열교환기의 전열관온도를 감지하는 단계와; 상기 실외열교환기의 전체 전열관 길이내의 일지점과 상기 제2모세관 사이에 연결된 바이패스배관상에 전자밸브를 마련하는 단계와; 난방운전 및 냉방운전시, 상기 실내열교환기의 전열관온도에 따라 상기 전자밸브를 개방 및 폐쇄시키는 단계를 포함하는 것을 특징으로 하는 냉난방겸용 공조기기의 제어방법에 의해 달성된다.In addition, according to another field of the present invention, a compressor, an indoor heat exchanger and an outdoor heat exchanger connected in series in a closed circuit and a refrigerant from the compressor to the outdoor heat exchanger during cooling operation and to the indoor heat exchanger during heating operation. In the air-conditioning and air conditioning equipment having a selective valve for selectively transmitting, and the first capillary tube and the second capillary tube sequentially arranged in series between the outdoor heat exchanger and the indoor heat exchanger, detecting the heat pipe temperature of the indoor heat exchanger Steps; Providing a solenoid valve on a bypass pipe connected between a point within the total heat pipe length of the outdoor heat exchanger and the second capillary pipe; In the heating operation and the cooling operation, it is achieved by the control method of the air conditioning and air conditioning equipment, characterized in that it comprises the step of opening and closing the solenoid valve in accordance with the heat pipe temperature of the indoor heat exchanger.
여기서, 난방운전시에는 상기 실내열교환기의 전열관온도가 소정의 온도값이상일 때, 냉방운전시에는 상기 실내열교환기의 전열관온도가 소정의 온도값이하일 때, 상기 전자밸브를 개방하는 것이 바람직하다.Here, it is preferable to open the solenoid valve when the heat exchanger tube temperature of the indoor heat exchanger is higher than or equal to a predetermined temperature value during the heating operation and when the heat exchanger tube temperature of the indoor heat exchanger is lower than or equal to the predetermined temperature value during the cooling operation.
이하에서는 첨부도면을 참조하여 본 발명에 대해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 냉난방겸용 공조기기의 냉매회로도이다. 이 도면에 도시된 바와 같이, 본 발명에 따른 냉난방겸용 공조기기는 종래의 냉난방겸용 공조기기와 마찬가지로, 냉매를 압축하는 압축기(1)와, 냉매를 실외공기와 열교환시키는 실외열교환기(3)와, 냉매를 실내공기와 열교환시키는 실내열교환기(5)를 가진다.1 is a refrigerant circuit diagram of a combined air conditioning and heating device according to the present invention. As shown in this figure, the combined air conditioning and air conditioner according to the present invention, like the conventional air conditioning and air conditioner, the compressor (1) for compressing the refrigerant, and the outdoor heat exchanger (3) for heat exchange the refrigerant with outdoor air and And an indoor heat exchanger (5) for exchanging the refrigerant with indoor air.
압축기(1)의 토출측에는 냉방운전 및 난방운전에 따라 압축기(1)에서 토출되는 냉매를 실외열교환기(3) 및 실내열교환기(5)를 향해 선택적으로 전달하는 4방향전환밸브(7)가 설치되어 있다.On the discharge side of the compressor 1, a four-way switching valve 7 for selectively transferring the refrigerant discharged from the compressor 1 toward the outdoor heat exchanger 3 and the indoor heat exchanger 5 in accordance with the cooling operation and the heating operation is provided. It is installed.
실외열교환기(3)와 실내열교환기(5) 사이에는 냉매를 감압팽창시키는 제1모세관(9) 및 제2모세관(11)이 순차적으로 직렬로 설치되어 있으며, 냉방운전시 실외열교환기(3)에서 실내열교환기(5)를 향해 유동하는 냉매는 통과시키고 난방운전시 실내열교환기(5)에서 실외열교환기(3)로 유동하는 냉매는 저지시켜 제2모세관(11)으로 유동하게 하는 체크밸브(13)가 제2모세관(11)과 병렬로 연결되어 있다.Between the outdoor heat exchanger 3 and the indoor heat exchanger 5, the first capillary tube 9 and the second capillary tube 11 for decompressively expanding the refrigerant are installed in series, and the outdoor heat exchanger 3 Pass through the refrigerant flowing toward the indoor heat exchanger (5) and the refrigerant flowing from the indoor heat exchanger (5) to the outdoor heat exchanger (3) during the heating operation to block the refrigerant to flow to the second capillary (11). The valve 13 is connected in parallel with the second capillary tube 11.
실외열교환기(3)와 실내열교환기(5)에는 각 열교환기(3,5)로 실외공기 및 실내공기가 통과되도록 실외기측 송풍팬(15) 및 실내기측 송풍팬(미도시)이 설치되어 있으며, 실내열교환기(5)에는 실내열교환기(5)내 전열관의 온도를 감지하는 온도센서(17)가 설치되어 있다.The outdoor heat exchanger (3) and the indoor heat exchanger (5) are provided with an outdoor air blower (15) and an indoor air blower (not shown) so that outdoor air and indoor air pass through each heat exchanger (3,5). In addition, the indoor heat exchanger (5) is provided with a temperature sensor (17) for sensing the temperature of the heat transfer tube in the indoor heat exchanger (5).
한편, 실외열교환기(3)내 전열관의 어느 일지점과 제2모세관(11) 사이를 연결하는 바이패스배관(19)이 설치되어 있으며, 이 바이패스배관(19) 상에는 제어부(21)에 의해 개방 및 폐쇄되는 전자밸브(23)가 설치되어 있다.On the other hand, a bypass pipe 19 for connecting between one point of the heat transfer pipe in the outdoor heat exchanger 3 and the second capillary pipe 11 is provided, and on the bypass pipe 19 by the control unit 21. The solenoid valve 23 which opens and closes is provided.
또한, 본 발명에 따른 제어부(21)는 전원공급부(25)로부터 전원을 공급받아 키조작부(27)의 입력정보에 의해 냉방 및 난방운전을 구동시키며, 실내열교환기(5)에 설치된 온도센서(17)의 신호에 따라 전자밸브구동회로(29)를 구동시켜 전자밸브(23)를 개방 및 차단시킨다.In addition, the control unit 21 according to the present invention receives the power from the power supply unit 25 to drive the cooling and heating operation by the input information of the key operation unit 27, the temperature sensor installed in the indoor heat exchanger (5) The solenoid valve driving circuit 29 is driven in accordance with the signal of 17 to open and shut off the solenoid valve 23.
이상과 같은 구성에 의하여, 전원공급부(25)에서 전원이 공급되며 키조작부(27)에서 냉방운전을 입력하여 냉방운전을 할 때에는 압축기(1)에서 압축된 냉매는 4방향전환밸브(7)를 지나 실외열교환기(3)로 유입된다. 실외열교환기(3)에 유입된 냉매는 실외열교환기측 송풍팬(15)에 의해 실외열교환기(3)를 통과하는 실외공기와 열전달을 일으켜 실외공기에 열을 빼앗기며 응축된다. 응축된 냉매는 체크밸브(13)를 지나 제1모세관(9)을 통과하면서 감압팽창되어 실내열교환기(5)에 유입된다. 실내열교환기(5)에 유입된 냉매는 실내열교환기측 송풍팬에 의해 실내열교환기(5)를 통과하는 실내공기와 열전달하여 실내공기로부터 열을 받아 증발하며 냉매에 열을 빼앗긴 실내공기는 냉각되어 실내를 냉방시킨다. 실내열교환기(5)에서 증발된 냉매는 4방향전환밸브(7)를 지나 압축기(1)로 유입된다.By the above configuration, when the power is supplied from the power supply unit 25 and the cooling operation is input from the key operation unit 27 to perform the cooling operation, the refrigerant compressed by the compressor 1 causes the four-way switching valve 7 to operate. After passing through the outdoor heat exchanger (3). The refrigerant introduced into the outdoor heat exchanger (3) causes heat transfer with the outdoor air passing through the outdoor heat exchanger (3) by the blower fan (15) on the outdoor heat exchanger side, whereby the heat is condensed to the outdoor air. The condensed refrigerant expands under reduced pressure while passing through the first capillary tube 9 through the check valve 13 and flows into the indoor heat exchanger 5. The refrigerant introduced into the indoor heat exchanger (5) is transferred to the indoor air passing through the indoor heat exchanger (5) by a blower fan of the indoor heat exchanger, receives heat from the indoor air, and evaporates. The indoor air deprived of the refrigerant is cooled. Cool the room. The refrigerant evaporated in the indoor heat exchanger (5) flows into the compressor (1) through the four-way switching valve (7).
또한, 키조작부(27)에서 난방운전을 입력하여 난방을 할 때에는, 압축기(1)에서 냉매가 압축되어 4방향전환밸브(7)를 지나 실내열교환기(5)에 유입된다. 실내열교환기(5)에 유입된 냉매는 실내공기와 열전달하여 실내공기에 열을 빼앗김에 따라 실내를 난방시키며, 실내공기에 열을 빼앗긴 냉매는 응축된다. 실내열교환기(5)에서 응축된 냉매는 제1모세관(9)을 지나면서 1차 감압팽창되며, 제2모세관(11)을 지나면서 2차 감압팽창된다. 2차 감압팽창된 냉매는 실외열교환기(3)에 유입되며, 실외열교환기(3)에 유입된 냉매는 실외열교환기측 송풍팬(15)에 의해 실외열교환기(3)를 통과하는 실외공기와 열전달을 일으켜 증발하여 4방향전환밸브(7)를 지나 압축기(1)에 유입된다.In addition, when the heating operation is input by the key operating unit 27 to heat the refrigerant, the refrigerant is compressed by the compressor 1 and flows into the indoor heat exchanger 5 through the four-way switching valve 7. The refrigerant introduced into the indoor heat exchanger (5) heats the indoor air as it transfers heat to the indoor air and loses heat to the indoor air, and the refrigerant deprived of heat to the indoor air is condensed. The refrigerant condensed in the indoor heat exchanger (5) is first expanded under reduced pressure while passing through the first capillary tube (9) and secondly under reduced pressure is expanded through the second capillary tube (11). The second pressure-expanded refrigerant is introduced into the outdoor heat exchanger (3), and the refrigerant introduced into the outdoor heat exchanger (3) passes through the outdoor heat exchanger (3) by the blower fan (15) of the outdoor heat exchanger. It generates heat transfer and evaporates and flows into the compressor 1 through the four-way valve 7.
이러한, 냉방운전중에 실외공기온도가 정상적인 냉방운전조건 보다 낮게되면 실외열교환기(3)에서 냉매가 과냉되어 실내열교환기(5)가 동결되는 냉방저온현상이 발생하며, 난방운전중에 실외공기온도가 정상적인 난방운전조건 보다 높게되면 실외열교환기(3)를 지나는 냉매가 과열되어 시스템의 압력 및 온도가 전반적으로 상승하는 난방과부하가 발생한다. 이때, 실내열교환기(5)내 전열관온도를 감지하는 온도센서(17)에서 냉방운전시 실내열교환기(5)내 전열관의 온도가 소정의 온도값 이하이거나 난방운전시 실내열교환기(5)내 전열관의 온도가 소정 온도값 이상이면 제어부(21)에 신호를 발생하여 전자밸브(23)를 개방함에 따라 냉방운전 및 난방운전시 실외열교환기(3)의 열교환 유효면적을 감소시킴에 따라 냉방저온 및 난방과부하를 해결할 수 있으며, 종래의 냉난방겸용 공조기기에서 냉방저온 및 난방과부하시 실외기측 송풍팬을 가동 및 정지에 따라 발생하는 전력소비 및 실외기측 송풍팬의 내구성문제를 해결할 수 있다.When the outdoor air temperature is lower than the normal cooling operation condition during the cooling operation, the refrigerant is supercooled in the outdoor heat exchanger 3 and the cooling low temperature phenomenon in which the indoor heat exchanger 5 is frozen occurs, and the outdoor air temperature is increased during the heating operation. When the heating condition is higher than the normal heating operation condition, the refrigerant passing through the outdoor heat exchanger 3 is overheated, and the heating overload occurs in which the pressure and temperature of the system generally increase. At this time, the temperature of the heat exchanger tube in the indoor heat exchanger 5 is lower than a predetermined temperature value during the cooling operation by the temperature sensor 17 that detects the heat transfer tube temperature in the indoor heat exchanger 5 or in the indoor heat exchanger 5 during the heating operation. If the temperature of the heat exchanger tube is greater than or equal to a predetermined temperature value, a signal is generated in the controller 21 to open the solenoid valve 23, thereby reducing the effective heat exchange area of the outdoor heat exchanger 3 during cooling operation and heating operation. And heating overload can be solved, the conventional air conditioning and air conditioning equipment can solve the power consumption and durability problems of the outdoor fan blower fan caused by the operation and shutdown of the outdoor air blower fan during cooling low temperature and heating overload.
이상에서 설명한 바와 같이, 본 발명에 따르면, 냉방저온 및 난방과부하가 발생되었을 때, 바이패스에 의해 실외열교환기의 열교환량을 조절함에 따라 실외열교환기측 송풍팬의 내구성을 향상시킬 수 있을 뿐만 아니라 전력소비를 감소시킬 수 있는 냉난방겸용 공조기기와 그 제어방법이 제공된다.As described above, according to the present invention, when cooling low temperature and heating overload are generated, by controlling the heat exchange amount of the outdoor heat exchanger by bypass, the durability of the blower fan of the outdoor heat exchanger can be improved as well as electric power. Provided are an air conditioning and air conditioning apparatus capable of reducing consumption and a method of controlling the same.
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| KR1019980028720A KR100310361B1 (en) | 1998-07-15 | 1998-07-15 | HVAC equipment and its control method |
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| KR20200059825A (en) | 2018-11-22 | 2020-05-29 | (주)이쿨 | Shelter-type cooling and heating apparatus |
| KR20200121765A (en) | 2020-09-10 | 2020-10-26 | (주)이쿨 | Shelter-type cooling and heating apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20200059825A (en) | 2018-11-22 | 2020-05-29 | (주)이쿨 | Shelter-type cooling and heating apparatus |
| KR20200121765A (en) | 2020-09-10 | 2020-10-26 | (주)이쿨 | Shelter-type cooling and heating apparatus |
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