KR100191529B1 - Coolant control device of multi-airconditioner - Google Patents
Coolant control device of multi-airconditioner Download PDFInfo
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- KR100191529B1 KR100191529B1 KR1019960032202A KR19960032202A KR100191529B1 KR 100191529 B1 KR100191529 B1 KR 100191529B1 KR 1019960032202 A KR1019960032202 A KR 1019960032202A KR 19960032202 A KR19960032202 A KR 19960032202A KR 100191529 B1 KR100191529 B1 KR 100191529B1
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- side heat
- heat exchanger
- refrigerant
- indoor
- indoor side
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Classifications
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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
- F25B41/31—Expansion 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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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
- F25B2600/2513—Expansion 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2519—On-off 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
Abstract
본 발명은 멜티에어컨의 냉매제어장치에 관한 것으로, 상기 실내측열교환기(13a, 13b, 13c)의 수와 같게 실외측열교환기(1a, 1b, 1c)를 설치하여 냉매를 제어함으로써, 1실 운전시와 다실 운전시의 실내측열교환기들간의 냉각능력차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있음은 물론, 저온 즉 1실만 운전시에도 실내측열교환기(13a, 13b, 13c)중 사용하고 있는 실내측열교환기가 동결되는 일이 없도록 된 것이다.The present invention relates to a refrigerant control device for a melt air conditioner, and the same as the number of the indoor side heat exchangers (13a, 13b, 13c), by installing the outdoor side heat exchangers (1a, 1b, 1c) to control the refrigerant, The optimum freezing cycle can be achieved by minimizing the difference in cooling capacity between indoor heat exchangers during operation and multi-room operation. In addition, it is used among indoor heat exchangers (13a, 13b, 13c) even in low temperature operation. The indoor heat exchanger is not frozen.
Description
제1도는 종래기술에 따른 냉매제어장치를 설명하는 냉매제어구성도.1 is a refrigerant control block diagram illustrating a refrigerant control apparatus according to the prior art.
제2도는 본 발명에 따른 냉매제어장치를 설명하는 냉매제어구성도이다.2 is a refrigerant control configuration diagram illustrating a refrigerant control apparatus according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1a, 1b, 1c : 실외측열교환기 2a, 2b, 2c : 전자식팽창밸브1a, 1b, 1c: Outdoor side heat exchanger 2a, 2b, 2c: Electronic expansion valve
11 : 압축기 13a, 13b, 13c : 실내측열교환기11: compressor 13a, 13b, 13c: indoor heat exchanger
14a, 14b, 14c : 솔레노이드밸브 15a, 15b, 15c : 2방향밸브14a, 14b, 14c: Solenoid valve 15a, 15b, 15c: 2-way valve
16a, 16b, 16c : 연결배관 18a, 18b, 18c : 2방향밸브16a, 16b, 16c: Connecting pipe 18a, 18b, 18c: 2-way valve
본 발명은 하나의 실외기를 이용하여 여러방을 동시 냉방 또는 선택 냉방할 수 있도록 된 멀티에어컨에 관한 것으로, 특히 1실 운전시와 다실 운전시 실내측 열교환기들간의 냉각능력차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있도록 한 멀티에어컨의 냉매제어장치에 관한 것이다.The present invention relates to a multi-air conditioner capable of simultaneously cooling or selectively cooling several rooms using a single outdoor unit, and in particular, optimal refrigeration by minimizing the difference in cooling capacity between indoor side heat exchangers during one-room operation and multi-room operation. The present invention relates to a refrigerant control device for a multi-air conditioner to achieve a cycle.
일반적으로 에어컨의 실외기는, 압축기와 실외측열교환기 및 냉매관에 연결되는 밸브등으로 이루어지고, 실내기는 실내측열교환기와 모세관 또는 팽창밸브 및 밸브등으로 이루어져 있는 바, 압축기에 의해 고온고압의 기체상태로 압축된 냉매가 실외측열교환기에 유입되면 실외측열교환기에서는 고온고압으로 압축된 기체냉매를 냉각팬에 의해 송풍되는 공기로 열교환하여 냉매를 강제냉각시켜 액화한다.In general, an outdoor unit of an air conditioner is composed of a valve connected to a compressor, an outdoor side heat exchanger, and a refrigerant pipe, and an indoor unit is composed of an indoor side heat exchanger, a capillary tube, an expansion valve, and a valve. When the compressed refrigerant is introduced into the outdoor side heat exchanger, the outdoor side heat exchanger exchanges the gas refrigerant compressed at high temperature and high pressure with air blown by a cooling fan to forcibly cool the refrigerant to liquefy.
이어서 상기 실외측열교환기에서 약 35℃-40℃로 온도가 저하된 고압의 액상냉매는 증발압력까지 팽창시키는 모세관을 통과하면서 저온저압의 기체와 액체로 공존하는 냉매로 되어 실내기의 실내측열교환기에 유입된다.Subsequently, the high pressure liquid refrigerant whose temperature is reduced to about 35 ° C.-40 ° C. in the outdoor side heat exchanger is a refrigerant that coexists with the low temperature low pressure gas and liquid while passing through a capillary tube that expands to the evaporation pressure. Inflow.
한편 상기 실내측열교환기로 유입된 냉매는 실내측열교환기를 통과하면서 기화할 때 실내팬에 의해 송풍되는 공기에서 열을 빼앗아 실내공기를 냉각시킨 다음, 그 냉각된 공기(냉풍)를 실내로 토출해서 냉방을 행하고, 상기 실내측열교환기에서 상변화된 저온저압의 기체냉매는 다시 압축기에 의해 흡입되어 반복순환하는 냉동싸이클을 형성한다.Meanwhile, the refrigerant introduced into the indoor heat exchanger takes heat from the air blown by the indoor fan when evaporated while passing through the indoor heat exchanger, cools the indoor air, and then discharges the cooled air (cold air) into the room to cool it. The low temperature and low pressure gas refrigerant, which is changed in phase in the indoor side heat exchanger, is again sucked by the compressor to form a recirculating refrigeration cycle.
그런데 이와같은 냉동싸이클에 의해 냉방을 수행하는 공기조화기는 실외기에 구비된 하나의 실외측열교환기로 실내기에 구비된 하나의 실내측열교환기를 제어하여 개별냉방을 수행하기 때문에 여러방을 동시에 냉방시킬 수 없는 결점이 있음은 물론, 다수개의 실내기로 여러방을 냉방할 경우에는 다수개의 실외기를 설치해야 하므로 설치공간을 확보하기가 곤란하고 미관도 좋지 않은 결점이 있었다.However, the air conditioner that performs cooling by such a refrigeration cycle cannot control several rooms simultaneously because individual air conditioning is performed by controlling one indoor heat exchanger provided in the indoor unit by one outdoor heat exchanger provided in the outdoor unit. Of course, when cooling a plurality of indoor units with a plurality of indoor units, it is difficult to secure the installation space and the aesthetics are not good because it requires the installation of a plurality of outdoor units.
이러한 제반결점을 해소하기 위하여 종래에도 제1도에 도시된 것과 같은 냉매순환을 하도록 된 멀티에어콘이 제안되어 있는 바, 실외기의 내부에 구비된 압축기(11)에 실외측열교환기(12)가 연결되고, 이 실외측열교환기(12)에 후술되는 실내기를 구성하는 각각의 실내측열교환기(13a, 13b, 13c)와 같은 개수로 분기시킬 수 있도록 된 분배수단인 솔레노이드밸브(14a, 14b, 14c)가 연결되며, 이 각각의 솔레노이드밸브(14a, 14b, 14c)에 1방향밸브(15a, 15b, 15c) 및 연결배관(16a. 16b, 16c)이 각각 직렬 연결됨과 더불어, 이 연결배관(16a, 16b, 16c)에 각각의 실내기를 구성하는 실내측열교환기(13a, 13b, 13c)의 출구측 냉매의 온도를 감지하여 오리피스다이어메타를 열고 닫으면서 유량을 제어할 수 있는 각각의 온도식팽창밸브(17a, 17b, 17c)가 직렬연결되고, 이 온도식팽창밸브(17a, 17b, 17c)와 3개의 실내측열교환기(13a, 13b, 13c)가 각각 직렬로 연결되며, 이 실내측열교환기(13a, 13b, 13c)에서 상변화된 저온저압의 기체냉매를 1개의 압축기(11)로 보낼수 있도록 2방향밸브(18a, 18b, 18c)가 각각 직렬로 설치된 구조로 되어 있다.In order to solve the above-mentioned shortcomings, a conventional air conditioner has been proposed to circulate a refrigerant as shown in FIG. 1 and the outdoor side heat exchanger 12 is connected to the compressor 11 provided in the outdoor unit. And the solenoid valves 14a, 14b, and 14c serving as distribution means capable of branching into the same number of indoor side heat exchangers 13a, 13b, and 13c constituting the indoor unit described later. ) Is connected to each of the solenoid valves 14a, 14b and 14c, and the one-way valves 15a, 15b and 15c and the connection pipes 16a, 16b and 16c are connected in series, respectively. Temperature expansion for controlling the flow rate by opening and closing the orifice diameter by sensing the temperature of the outlet side refrigerant of the indoor side heat exchangers 13a, 13b, and 13c constituting the respective indoor units in the air conditioners 16b and 16c. The valves 17a, 17b, 17c are connected in series, and these thermal expansion valves 17a, 17 are b, 17c and three indoor heat exchangers 13a, 13b, and 13c are connected in series, and the low-temperature, low pressure gas refrigerant phase-changed in the indoor heat exchangers 13a, 13b, and 13c is connected to one compressor ( The two-way valves 18a, 18b, and 18c are installed in series so that they can be sent to 11).
이러한 멀티에어컨의 냉매제어는, 실외기에 구비된 압축기(11)에 의해 고온고압의 기체상태로 압축된 냉매가 1개의 실외측열교환기(12)로 유입되면 상기 실외측열교환기(12)에서는 고온고압으로 압축된 기체냉매를 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시키게 되고, 상기 실외측열교환기(12)에서 액화된 저온고압의 액상냉매가 실내측열교환기(13a, 13b, 13c)와 같은 개수이면서 해당 실내측열교환기(13a, 13b, 13c)와 연동하여 개폐되는 솔레노이드밸브(14a, 14b, 14c)와 2방향밸브(15a, 15b, 15c) 및 연결배관(16a, 16b, 16c)을 매개로 분리됨과 동시에 냉매의 유입을 제어함은 물론 양을 조절할 수 있는 온도식팽창밸브(17a, 17b, 17c)를 통과하면서 상변화되어 각각의 실내기에 구비된 실내측열교환기(13a, 13b, 13c)에 유입되며, 이 실내측열교환기(13a, 13b, 13c)를 통과하는 냉매가 증발하여 기화할 때 실내팬에 의해 송풍되는 공기에서 열을 빼앗아 실내공기를 냉각시킨 다음 그 냉각된 공기를 실내로 토출시켜 냉방을 행하고 상기 실내측열교환기(13a, 13b, 13c)에서 상변화된 저온저압의 기체냉매는 유입수단의 2방향밸브(18a, 18b, 18c)를 통해서 다시 압축기(11)가 흡입하게 되어 반복순환하는 냉동싸이클을 형성한다.Refrigerant control of the multi-air conditioner, when the refrigerant compressed in the gas state of high temperature and high pressure by the compressor 11 provided in the outdoor unit flows into one outdoor side heat exchanger 12, the outdoor side heat exchanger 12 has a high temperature The gas refrigerant compressed to high pressure is liquefied by cooling the refrigerant with air blown by a cooling fan, and the low temperature and high pressure liquid refrigerant liquefied in the outdoor side heat exchanger (12) is an indoor side heat exchanger (13a, 13b, 13c). ) And solenoid valves 14a, 14b, 14c and two-way valves 15a, 15b, 15c that are opened and closed in conjunction with the corresponding indoor side heat exchangers 13a, 13b, 13c, and connecting pipes 16a, 16b, The indoor side heat exchanger 13a provided in each indoor unit is phase-changed while passing through the thermal expansion valves 17a, 17b, and 17c, which can be separated by the medium 16c and control the inflow of the refrigerant, as well as control the amount thereof. , 13b, 13c) through the indoor side heat exchanger (13a, 13b, 13c) The excess refrigerant takes heat away from the air blown by the indoor fan when the refrigerant evaporates and vaporizes, cools the indoor air, and then discharges the cooled air into the room to perform cooling. The indoor side heat exchanger (13a, 13b, 13c) The low-temperature low-temperature gas refrigerant at the compressor is again sucked by the compressor 11 through the two-way valves 18a, 18b, and 18c of the inlet unit, thereby forming a refrigerating cycle.
그러나 이러한 냉동싸이클은 실외측열교환기(12)의 출구에 별도의 냉매분배장치를 사용하여 각각의 실내측열교환기(13a, 13b, 13c)로 냉매를 분배하여 1실에서 다실까지 운전하게 되는바, 1실 운전시와 다실 운전시가 모두 한 개의 실내측열교환기(13a, 13b, 13c)에 의해 냉매가 공급되므로 1실 운전시와 다실 운전시에 냉각능력의 차이가 발생되는 문제점이 있었다.However, such a refrigeration cycle uses a separate refrigerant distribution device at the outlet of the outdoor side heat exchanger (12) to distribute the refrigerant to each indoor side heat exchanger (13a, 13b, 13c) to operate from one room to the tea room. In the single-room operation and the multi-room operation, the refrigerant is supplied by one indoor side heat exchanger (13a, 13b, 13c), so there is a problem that a difference in cooling capacity occurs during single-room operation and multi-room operation.
또한 저온 즉 1실만 운전할 경우에도 용량이 큰 실외측열교환기를 사용해야 하므로 실외측열교환기가 과냉이 되어 실내측열교환기(13a, 13b, 13c)중 사용하고 있는 실내측열교환기가 동결되는 결점이 있다.In addition, even when only one room is operated at a low temperature, a large capacity outdoor side heat exchanger has to be used, so the outdoor side heat exchanger becomes overcooled, and the indoor side heat exchanger used among the indoor side heat exchangers 13a, 13b, and 13c freezes.
이에 본 발명은 상기와 같은 결점을 해결하기 위하여 안출된 것으로, 실외기의 내부에 설치된 내측실외측열교환기를 실내기의 수와 같게 설치하여 냉매가 순환되도록 제어할 수 있는 구조로, 1실 운전시와 다실 운전시의 실내측열교환기들간의 냉각능력차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있음은 물론, 실내측열교환기의 과냉을 방지할 수 있도록 한 멀티에어컨의 냉매제어장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above-mentioned drawbacks, and the structure that can control the refrigerant to be circulated by installing the inside and outside heat exchanger installed inside the outdoor unit equal to the number of the indoor unit, one room operation and multi-room The purpose of the present invention is to provide an optimal refrigeration cycle by minimizing the difference in cooling capacity between indoor heat exchangers during operation, and to provide a refrigerant control device of a multi-air conditioner to prevent overcooling of the indoor heat exchanger. .
상기와 같은 목적을 달성하기 위한 본 발명은, 실외기에는 고온고압의 기체상태로 압축된 냉매를 이송시키는 압축기에 실내측열교환기와 같은 수로 분기되도록 솔레노이드밸브가 연결되고, 이 솔레노이드밸브에 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시킬 수 있도록 실외측열교환기의 일단이 각각 직렬로 연결되며, 이 실외측열교환기의 타단에 2방향밸브가 직렬로 연결됨과 더불어, 상기 압축기의 타단에는 실내측열교환기에 각각 직렬로 연결되어 냉각된 저온저압의 기체냉매를 유입할 수 있도록 2방향밸브가 설치되는 한편, 실내기는 상기 2방향밸브와 각각 직렬로 연결된 연결배관을 매개로 실내측열교환기의 입.출구측 온도차이를 마이컴에 수식으로 입력하여 마이컴의 신호에 의하여 밸브의 모타를 회전시켜 밸브스핀들을 제어함으로써 유량을 제어하는 전자식팽창밸브가 연결되고, 이 전자식팽창밸브와 각각 직렬로 3개의 실내측열교환기가 연결되며, 이 실내측열교환기에 연결배관을 매개로 냉각된 저온저압의 기체냉매를 1개의 압축기로 보낼수 있도록 된 2방향밸브와 연결된 구조로 되어 있다.The present invention for achieving the above object, the outdoor unit is connected to the solenoid valve to branch to the same number as the indoor side heat exchanger to the compressor for transporting the compressed refrigerant in the gas state of high temperature and high pressure, the solenoid valve by a cooling fan One end of the outdoor side heat exchanger is connected in series so that the refrigerant can be cooled and liquefied by the blown air, and a two-way valve is connected in series with the other end of the outdoor side heat exchanger, and the other side of the compressor has an indoor side. The two-way valve is installed to inject the refrigerant of the low temperature and low pressure, respectively, connected in series to the heat exchanger, while the indoor unit is connected to the inlet of the indoor heat exchanger through a connecting pipe connected in series with the two-way valve. Control the valve spins by inputting the temperature difference of the outlet side into the microcomputer by rotating the motor of the valve according to the microcomputer signal. An electronic expansion valve for controlling the flow rate is connected, and each of the three indoor side heat exchangers is connected in series with the electronic expansion valve, and the low temperature and low pressure gas refrigerant cooled through the piping is connected to one compressor. It is connected to the two-way valve that can be sent to.
이하 본 발명의 실시예에 관하여 첨부된 예시도면에 의거 상세히 설명한다.Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.
제2도는 본 발명에 따른 냉매제어장치를 설명하는 냉매제어구성도로서, 종래기술을 설명하는 제1도와 동일한 부위에는 동일한 참조부호를 붙이면서 그 설명은 생략한다.2 is a refrigerant control block diagram illustrating a refrigerant control apparatus according to the present invention, and the same reference numerals are attached to the same portions as those in FIG.
본 발명에 따른 냉매제어장치는, 실외기의 내부에는 고온고압의 기체상태로 압축된 냉매를 이송시키는 압축기(11)에 실내측열교환기(13a, 13b, 13c)와 같은 수로 분기되도록 솔레노이드밸브(14a, 14b, 14c)가 연결되고, 이 솔레노이드밸브(14a, 14b, 14c)에 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시킬 수 있도록 각각 직렬로 실외측열교환기(1a, 1b, 1c)가 연결되며, 이 실외측열교환기(1a, 1b, 1c)에 각각 직렬로 2방향밸브(15a, 15b, 15c)가 연결됨과 더불어, 상기 압축기(11)의 타단에는 실내측열교환기(13a, 13b, 13c)에 직각 직렬로 연결되어 냉각된 저온저압의 기체냉매를 유입할 수 있도록 2방향밸브(18a, 18b, 18c)가 설치되는 한편, 실내기에는 상기 2방향밸브(15a, 15b, 15c)와 연결배관(16a, 16b, 16c)을 매개로 실내측열교환기(13a, 13b, 13c)의 입.출구측 온도차이를 마이컴에 수식으로 입력하여 마이컴의 신호에 의하여 밸브의 모타를 회전시켜 밸브스핀들을 제어함으로써 유량을 제어하는 전자식팽창밸브(2a, 2b, 2c)가 연결되고, 이 전자식팽창밸브(2a, 2b, 2c)와 직각 직렬로 3개의 실내측열교환기(13a, 13b, 13c)가 연결되며, 이 실내측열교환기(13a, 13b, 13c)에 각각 직렬로 연결된 연결배관(16a, 16b, 16c)를 매개로 상기 2방향밸브(18a, 18b, 18c)와 연결된 구조로 되어 있다.In the refrigerant control apparatus according to the present invention, the solenoid valve 14a is branched into the same number as the indoor side heat exchangers 13a, 13b, and 13c to the compressor 11 for conveying the compressed refrigerant in a gaseous state of high temperature and high pressure inside the outdoor unit. , 14b and 14c are connected to the solenoid valves 14a, 14b, and 14c in order to cool the refrigerant with air blown by a cooling fan to liquefy the outdoor side heat exchangers 1a, 1b, and 1c, respectively. Are connected, and two-way valves 15a, 15b, and 15c are connected in series to the outdoor side heat exchangers 1a, 1b, and 1c, respectively, and at the other end of the compressor 11, an indoor side heat exchanger 13a, The two-way valves 18a, 18b, and 18c are installed to be inclined at right angles to 13b and 13c so as to allow cooling of the low-temperature, low-pressure gas refrigerant, while the indoor unit is provided with the two-way valves 15a, 15b, and 15c. The temperature difference between the inlet and outlet of the indoor side heat exchanger (13a, 13b, 13c) via the connection pipe (16a, 16b, 16c) Electronic expansion valves (2a, 2b, 2c) for controlling the flow rate by controlling the valve spins by rotating the motor of the valve in accordance with the signal of the microcomputer inputted by the formula, and the electronic expansion valve (2a, 2b, 2c) and Three indoor side heat exchangers 13a, 13b and 13c are connected in a right angle series, and are connected to the indoor side heat exchangers 13a, 13b and 13c via connecting pipes 16a, 16b and 16c respectively connected in series. It is connected to two-way valves 18a, 18b, and 18c.
이러한 멀티에어컨의 냉매제어는, 압축기(11)에 의해 고온고압으로 된 냉매를 각각의 실내기를 구성하는 실내측열교환기(13a, 13b, 13c)의 개수와 같은 수로 설치된 솔레노이드밸브(14a, 14b, 14c)에 의해 분기시키는 냉매분리단계와, 이 솔레노이드밸브(14a, 14b, 14c)를 통해 공급된 냉매가 직렬로 연결되도록 실외기의 내부에 구비된 각각의 실외측열교환기(1a, 1b, 1c)에 유입되면 실외측열교환기(1a, 1b, 1c)에서는 고온 고압으로 압축된 기체냉매를 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시키는 액화단계와, 상기 실외측열교환기(1a, 1b, 1c)에서 액화된 저온고압의 액상냉매가 실내측열교환기(13a, 13b, 13c)와 같은 개수의 2방향밸브(15a, 15b, 15c)와 연결배관(16a, 16b, 16c) 및 전폐/전개가 가능한 전자식팽창밸브(2a, 2b, 2c)를 통과하면서 저온저압의 무상냉매로 감압되어 3개의 실내측열교환기(13a, 13b, 13c)에 동시에 유입시킬 수 있도록 된 냉매유입단계, 이 실내측열교환기(13a, 13b, 13c)에서는 전자식팽창밸브(2a, 2b, 2c)에서 감압된 저온저압의 무상냉매가 여러개의 파이프를 통과하면서 증발하여 기화할 때 실내팬에 의해 송풍되는 공기에 열을 빼앗아 실내공기를 냉각시킨 다음 그 냉각된 공기를 실내로 토출시켜 냉방을 행하고 상기 실내측열교환기(13a, 13b, 13c)에서 냉각된 저온저압의 기체냉매는 2방향밸브(18a, 18b, 18c)를 통해서 다시 압축기(11)로 흡입하는 흡입단계로 이루어져 반복순환하는 냉동싸이클을 형성한다.The refrigerant control of the multi-air conditioner is performed by the solenoid valves 14a, 14b, which are provided with the same number as the number of the indoor side heat exchangers 13a, 13b, and 13c constituting each indoor unit of the refrigerant which has become a high temperature and high pressure by the compressor 11 A refrigerant separation step branched by 14c), and each outdoor side heat exchanger 1a, 1b, 1c provided inside the outdoor unit such that refrigerant supplied through the solenoid valves 14a, 14b, 14c is connected in series. In the outdoor side heat exchanger (1a, 1b, 1c) is a liquefaction step of liquefying the refrigerant by the air blown by the cooling fan in the gas refrigerant compressed to high temperature and high pressure, and the outdoor side heat exchanger (1a, 1b) , The liquid refrigerant of the low temperature and high pressure liquefied in 1c) is connected to the same number of two-way valves 15a, 15b, 15c and the connecting pipes 16a, 16b, and 16c as the indoor side heat exchangers 13a, 13b, and 13c. Through free expansion refrigerant of low temperature and low pressure while passing through electronic expansion valves (2a, 2b, 2c) that can be deployed Refrigerant inflow step, which is pressurized to be introduced into three indoor side heat exchangers (13a, 13b, 13c) at the same time. In the indoor side heat exchangers (13a, 13b, 13c), electromagnetic expansion valves (2a, 2b, 2c) are provided. When the reduced-temperature low-temperature free refrigerant evaporates and evaporates while passing through several pipes, it takes the heat from the air blown by the indoor fan, cools the indoor air, and discharges the cooled air into the room to perform cooling. The low temperature and low pressure gas refrigerant cooled in the heat exchanger (13a, 13b, 13c) consists of a suction step which is sucked back into the compressor (11) through two-way valves (18a, 18b, 18c) to form a recirculating refrigeration cycle. do.
이와 같이 구성된 본 발명의 실시예에 의한 냉매흐름과 그에 따른 효과를 다음에 설명한다.The refrigerant flow and its effects according to the embodiment of the present invention configured as described above will be described next.
상기 압축기(11)를 통과한 고온고압의 냉매가스는 멀티에어컨으로 사용시에, 3개의 솔레노이드밸브(14a, 14b, 14c)와 실외측열교환기(1a, 1b, 1c)를 거쳐 액상의 냉매상태로 되고, 이 액상냉매는 상기 연결배관(16a, 16b, 16c)을 통하여 전자식팽창밸브(2a, 2b, 2c)에 의해 감압팽창되어 각각 실외측열교환기(1a, 1b, 1c)와 직렬연결된 실내측열교환기(13a, 13b, 13c)에서 증발된 뒤 압축기(11)로 순환되게 된다.The high-temperature, high-pressure refrigerant gas that has passed through the compressor (11) passes through three solenoid valves (14a, 14b, 14c) and an outdoor side heat exchanger (1a, 1b, 1c) when used as a multi-air conditioner. The liquid refrigerant is expanded under reduced pressure by the electronic expansion valves 2a, 2b, and 2c through the connection pipes 16a, 16b, and 16c, respectively, and is connected to the indoor side heat exchangers 1a, 1b, and 1c in series. After being evaporated in the heat exchangers 13a, 13b, and 13c, they are circulated to the compressor 11.
한편 상기 실내기를 구성하는 실내측열교환기(13a, 13b, 13c)를 필요에 따라 선택적으로 운전시킬 때에는 실내기의 운전수에 따라 실외측열교환기(1a, 1b, 1c)의 솔레노이드밸브(14a, 14b, 14c)와 전자식팽창밸브(2a, 2b, 2c)가 연동하여 동작하게 된다.On the other hand, when the indoor side heat exchangers 13a, 13b, and 13c constituting the indoor unit are selectively driven as necessary, the solenoid valves 14a, 14b, 14c) and the electronic expansion valves 2a, 2b, and 2c operate in conjunction with each other.
즉 상기 실내측열교환기(13a, 13b, 13c)중에서 하나의 실내측열교환기(13a, 13b, 13c)를 필요에 따라 선택적으로 운전시킬 때에는 실내기의 운전수에 따라 실외측열교환기(1a, 1b, 1c)의 솔레노이드밸브(,14a, 14b, 14c)와 전자식팽창밸브(2a, 2b, 2c)가 연동하여 동작하게 된다.That is, when one indoor side heat exchanger (13a, 13b, 13c) is selectively operated among the indoor side heat exchangers (13a, 13b, 13c) as necessary, the outdoor side heat exchangers (1a, 1b, The solenoid valves 14a, 14b and 14c of 1c and the electronic expansion valves 2a, 2b and 2c operate in conjunction with each other.
즉 상기 실내측열교환기(13a, 13b, 13c)중에서 하나의 실내측열교환기(13a)만을 동작시킬 경우에는 마이컴(도시않음)의 제어에 의해 실외측열교환기(1a, 1b, 1c)중에서 하나의 실외측열교환기(1a)만을 동작하게 하므로써, 동작되는 실내측열교환기(13a)가 과냉되는 것을 방지할 수 있을 뿐만 아니라 일정한 냉각능력을 발휘하게 된다.That is, when only one indoor side heat exchanger 13a is operated among the indoor side heat exchangers 13a, 13b and 13c, one of the outdoor side heat exchangers 1a, 1b and 1c is controlled by a microcomputer (not shown). By only operating the outdoor side heat exchanger 1a, the indoor heat exchanger 13a that is operated can be prevented from being overcooled and exhibit a constant cooling capacity.
또한 상기 실내측열교환기(13a, 13b, 13c)중에서 하나의 실내측열교환기가 13b 또는 13c인 경우에는 실외기의 내부에 구비된 실외측열교환기중에서 1b 또는 1c만을 동작시키게 되어, 동작되는 실내측열교환기가 과냉되는 것을 방지할 수 있을 뿐만 아니라 일정한 냉각능력을 발휘하게 된다.In addition, when one indoor side heat exchanger is 13b or 13c among the indoor side heat exchangers 13a, 13b, and 13c, only 1b or 1c is operated among the outdoor side heat exchangers provided inside the outdoor unit, thereby operating indoor side heat exchanger. In addition to preventing overcooling of the group, it also exhibits a constant cooling capacity.
이상 설명한 바와 같이 본 발명에 의하면, 상기 실내측열교환기(13a, 13b, 13c)의 수와 같게 실외기의 내부에 실외측열교환기(1a, 1b, 1c)를 설치하여 냉매를 제어함으로써, 1실 운전시와 다실 운전시의 실내측열교환기들간의 냉각능력 차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있음은 물론, 저온 즉 1실만 운전시에도 실내측열교환기(13a, 13b, 13c)중 사용하고 있는 실내측열교환기가 동결되는 일이 없게 되는 효과가 있다.As described above, according to the present invention, by controlling the refrigerant by installing the outdoor side heat exchangers 1a, 1b, and 1c in the interior of the outdoor unit in the same manner as the number of the indoor side heat exchangers 13a, 13b, and 13c, It is possible to achieve the optimal freezing cycle by minimizing the difference in cooling capacity between indoor heat exchangers during operation and multi-room operation, and to use it in the indoor heat exchangers (13a, 13b, 13c) even when operating at low temperature. There is an effect that the indoor heat exchanger is not frozen.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102671583A (en) * | 2012-05-25 | 2012-09-19 | 安徽淮化股份有限公司 | Complementary standby system for process air blower and instrument air blower |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980013640A (en) | 1998-05-15 |
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