KR19980013640A - Refrigerant control device of multi air conditioner - Google Patents

Refrigerant control device of multi air conditioner Download PDF

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Publication number
KR19980013640A
KR19980013640A KR1019960032202A KR19960032202A KR19980013640A KR 19980013640 A KR19980013640 A KR 19980013640A KR 1019960032202 A KR1019960032202 A KR 1019960032202A KR 19960032202 A KR19960032202 A KR 19960032202A KR 19980013640 A KR19980013640 A KR 19980013640A
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South Korea
Prior art keywords
refrigerant
heat exchanger
indoor heat
heat exchangers
series
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KR1019960032202A
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Korean (ko)
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KR100191529B1 (en
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강성훈
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김광호
삼성전자 주식회사
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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
    • 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
    • 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
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off 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

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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)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

본 발명은 멜티에어컨의 냉매제어장치에 관한 것으로, 상기 실내측열교환기(13a,13b,13c)의 수와 같게 실외측열교환기(la,lb,1c)를 설치하여 냉매를 제어함으로써, 1실 운전시와 다실 운전시의 실내측열교환기들간의 냉각능력차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있음은 물론, 저 온 즉 1실 만 운전시 에도 실내측열교환기(13a,13b,13c)중 사용하고 있는 실내측열교환기가 동결되는 일이 없도록 된 것이다.The present invention relates to a refrigerant control device for a melter air conditioner and is provided with outdoor heat exchangers (la, lb, 1c) equal in number to the indoor heat exchangers (13a, 13b, 13c) The difference in cooling ability between the indoor heat exchangers at the time of operation and the operation of the multi-room can be minimized, so that an optimal refrigeration cycle can be achieved. In addition, So that the indoor heat exchanger in use is not frozen.

Description

멀티에어컨의 냉매제어장치Refrigerant control device of multi air conditioner

제 1도는 종래기술에 따른 냉매제어장치를 설명하는 냉매제어 구성도,FIG. 1 is a refrigerant control configuration diagram for explaining a refrigerant control apparatus according to the related art,

제 2도는 본 발명에 따른 냉매제어장치를 설명하는 냉매제어 구성도이다.FIG. 2 is a refrigerant control configuration diagram for explaining a refrigerant control apparatus according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Description of the Related Art [0002]

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 valves 15a, 15b, 15c: two-way valve

16a,16b,16c: 연결배관 18a,18b,18c:2방향밸브16a, 16b, 16c: connection piping 18a, 18b, 18c: two-way valve

본 발명은 하나의 실외기를 이용하여 여러방을 동시냉방 또는 선택냉방할 수 있도록 된 멀티에어컨에 관한 것으로, 특히 1실운전시와 다실운전시 실내측열교환기들간의 냉각능력차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있도록 한 멀티공조기의 냉매제어장치에 관한 것이다.The present invention relates to a multi-type air conditioner capable of simultaneously cooling or selectively cooling multiple rooms using one outdoor unit. In particular, the present invention minimizes the difference in cooling ability between indoor heat exchangers during one room operation and multi- And more particularly, to a refrigerant control apparatus for a multi-air conditioner capable of performing 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 고온고암으로 압축된 기체냉매를 냉각왠에 의해 송풍되는 공기로 열교환하여 냉매를 강제냉각시켜 액화한다.Generally, the outdoor unit of the air conditioner is composed of a compressor, an outdoor heat exchanger and a valve connected to the refrigerant pipe. The indoor unit is composed of an indoor heat exchanger, a capillary tube or an expansion valve and a valve, When the refrigerant compressed into the outdoor heat exchanger flows into the outdoor heat exchanger, the refrigerant compressed by the high temperature and high pressure air is heat-exchanged with the air blown by the cooling water 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 실내측열교환기에 유입된다.The high-pressure liquid-phase refrigerant whose temperature has dropped to about 35 ° C to 40 ° C in the outdoor heat exchanger passes through the capillary tube which expands to the evaporation pressure and flows into the indoor heat exchanger as a refrigerant coexisting with the low- .

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.On the other hand, the refrigerant flowing into the indoor heat exchanger takes heat from the air blown by the indoor fan when it is vaporized while passing through the indoor heat exchanger to cool the indoor air, and then discharges the cooled air (cool air) And the phase-changed low-temperature and low-pressure gas refrigerant in the indoor heat exchanger is again sucked by the compressor to form a refrigerant cycle repeatedly circulated.

그런데 이와같은 냉동싸이클에 의해 냉방을 수행하는 공기조화기는 하나의 실외측열교환기로 하나의 실내측열교환기를 제어하여 개별냉방을 수행하기 때문에 여러방을 동시에 냉방시킬 수 없는 결점이 있음은 물론, 다수개의 실내측열교환된기로 여러방을 냉방한 경우에는 다수개의 실외측열교환기를 설치해야 하므로 설치공간을 확보하기가 곤란하고 미관도 좋지 않은 결점이 있었다.However, the air conditioner that performs the cooling by the refrigeration cycle has the disadvantage that it can not simultaneously cool multiple rooms because one indoor heat exchanger is controlled by one outdoor heat exchanger to perform individual cooling, When a plurality of rooms are cooled by indoor heat exchanger, a plurality of outdoor heat exchangers must be installed, so that it is difficult to secure an installation space and there is a drawback that the aesthetics are poor.

이러한 제반결점을 해소하기 위하여 종래에도 제 1도에 도시된 것과 같은 냉매순환을 하도록 된 멀티에어콘이 제안되어 있는 바, 압축기(11)에 실외측열교환기(12)가 연결되고, 이 실외측열교환기(12)에 후술되는 실내측열교환기(13a,13b,13c)와 같은 갯수로 분기시킬 수 있도록 된 분배수단인 솔레노이드밸브(14a,14b,14c)가 연결되며, 이 각각의 솔레노이드밸브(14a,14b,14c)에 2방향밸브(15a,15b,15c) 및 연결배관(16a,16b,16c)이 각각 직렬연결됨과 더불어, 이 연결배관 (16a,16b,16c)에 실내측열교환기(13a,13b,13c)의 출구측 냉매의 온도를 감지하여 오리피스다이어메타를 열고 닫으면서 유량을 제어한 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.To solve these drawbacks, there has been proposed a multi-air conditioner in which refrigerant circulation as shown in FIG. 1 is conventionally performed. In this case, the outdoor heat exchanger 12 is connected to the compressor 11, Solenoid valves 14a, 14b and 14c, which are distributing means capable of branching in the same number as the indoor heat exchangers 13a, 13b and 13c described later, are connected to the unit 12, and the respective solenoid valves 14a Way valves 15a, 15b and 15c and connection pipes 16a, 16b and 16c are connected in series to the connection pipes 16a, 16b and 16c, and the indoor heat exchangers 13a 17b, and 17c, which can control the flow rate while opening and closing the orifice diaphragm by sensing the temperature of the refrigerant at the outlet side of the thermostatic expansion valve 17, The indoor heat exchangers 13a, 13b, and 13c are connected in series to the three indoor heat exchangers 13a, 13b, and 13c, Directional valves 18a, 18b and 18c are connected in series so that the low-temperature and low-pressure gas refrigerant can be sent to the single compressor 11 by means of the two-way valves 13a, 13b and 13c.

이러한 멀티에어컨의 냉매제어는, 압축기(11)에 의해 고온고압의 기체상태로 압축된 냉매가 1개의 실외측열교환기(12)에 유입되면 상기 실외측열교환기(12)에서는 고온고압으로 압축된 기체냉매를 냉각땐에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시키게 되고, 상기 실외측열교환기(12)에서 액화된 저온고압의 액상냉매가 실내측열교환기 (13a,13b,13c)와 같은 갯수이면서 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 실내측열교환기(13a,13b,13c)에 유입되며, 이 실내측열교환기(13a,13b,13c)를 통과하는 냉매가 증발하여 기화한 때 실내땐에 의해 송풍되는 공기에서 열을 빼앗아 실내공기를 냉각시킨 다음 그 냉각된 공기를 실내로 토출시켜 냉방을 행하고 상기 실내측열교환기(13a,13b,13c)에서 상변화된 저온저압의 기체냉매는 유입수단인 2방향밸브(18a,18b,18c)를 통해서 다시 압축기(11)가 흡입하게 되어 반복순환하는 냉동싸이클을 형성한다.When the refrigerant compressed in the gas state of high temperature and high pressure by the compressor 11 flows into one outdoor heat exchanger 12, the outdoor heat exchanger 12 compresses the refrigerant at high temperature and high pressure (13a, 13b, 13c), which is the same as that of the indoor heat exchangers (13a, 13b, 13c), by liquefying the gas refrigerant by cooling the refrigerant with the air blown by the gas refrigerant in the outdoor heat exchanger (12) The solenoid valves 14a, 14b and 14c and the two-way valves 15a, 15b and 15c and the connecting pipes 16a, 16b and 16c, which are opened and closed in cooperation with the indoor heat exchangers 13a, 13b and 13c, And the refrigerant flows into the indoor heat exchangers 13a, 13b, and 13c while being phase-changed while passing through the thermostatic expansion valves 17a, 17b, and 17c capable of controlling the amount of the refrigerant, When the refrigerant passing through the indoor side heat exchangers (13a, 13b, 13c) evaporates and vaporizes, And the phase-changed low-temperature and low-pressure gaseous refrigerant in the indoor heat exchangers (13a, 13b, 13c) is cooled in two directions The compressor 11 is again sucked through the valves 18a, 18b and 18c to form a refrigerating cycle which is repeatedly circulated.

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 운전시에 실내측열교환기(13a,13b,13c)의 냉력차이가 발생됨은 물론, 저온 즉 1실만 운전시 실내측열교환기(13a,13b,13c)중 사용하고 있는 실내측열교환기가 동결되는 결점이 있었다.However, in this refrigeration cycle, refrigerant is distributed to each of the indoor heat exchangers (13a, 13b, 13c) by using a separate refrigerant distribution device at the outlet of the outdoor heat exchanger (12) , The difference in cooling power between the indoor heat exchangers (13a, 13b, 13c) is generated at the time of one room operation and at the time of the multi-room operation, and at the same time, the use of the indoor heat exchangers (13a, 13b, 13c) There is a drawback that the indoor side heat exchanger is frozen.

이에 본 발명은 상기와 같은 결점을 해결하기 위하여 안출된 것으로, 실내측열교환기의 수와 같게 실외측열교환기를 설치하여 냉매를 제어할 수 있는 구조로,1실 운전시와 다실 운전시의 실내측열교환기들간의 냉각능력차이를 최소화하여 최적의 냉동싸이클을 이룰 수 있도록한 멀티에어컨의 냉매제어장치를 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an outdoor heat exchanger which is capable of controlling a refrigerant by providing an outdoor heat exchanger equal in number to indoor heat exchangers, And an object of the present invention is to provide a multi-air conditioner refrigerant control apparatus capable of minimizing the difference in cooling ability between heat exchangers to achieve an optimal refrigeration cycle.

상기와 같은 목적을 달성하기 위한 본 발명은, 고온고압의 기체상태로 압축된 냉매를 이송시키는 압축기에 실내측열교환기와 같은 수로 분기되도록 솔레노이드밸브가 연결되고, 이 솔레노이드밸브에 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시킬 수 있도록 실외측열교환기가 각각 직렬로 연결되며, 이 실외측열교환기에 2방향밸브 및 연결배관이 각각 직렬로 연결됨과 더불어, 이 연결배관을 통해 공급된 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 각각 직렬로 연결되어 냉각된 저온저압의 기체냉매를 1개의 압축기로 보낼수 있도록 2방향밸브가 설치된 구조로 되어 있다.In order to accomplish the above object, the present invention is characterized in that a solenoid valve is connected to a compressor for transferring a refrigerant compressed in a gaseous state at a high temperature and a high pressure to the same number as that of the indoor heat exchanger, and the solenoid valve is blown Side heat exchanger is connected in series so that the refrigerant can be cooled and liquefied by air, and a two-way valve and a connection pipe are connected in series to the outdoor heat exchanger, and in addition, the indoor heat exchanger And an electronic expansion valve for controlling the flow rate of the valve spindle by rotating the motor of the valve by a signal of the microcomputer is connected to the microcomputer, Side indoor heat exchanger are connected to each other) are connected in series to the indoor heat exchanger, and the cooled low-temperature low-pressure gas Way valve so that the refrigerant can be sent to one compressor.

이하 본 발명의 실시예에 관하여 첨부된 예시도면에 의거 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제 2도는 본 발명에 따른 냉매제어장치를 설명하는 냉매제어구성도로서, 종래기술을 설명하는 제 1도와 동일한 부위에는 동일한 참조부호를 붙이면서 그 설명은 생략한다.FIG. 2 is a refrigerant control configuration diagram for explaining a refrigerant control apparatus according to the present invention. The same reference numerals are assigned to the same parts as those of the first embodiment, and a description thereof will be omitted.

본 발명에 따른 냉매제어장치는, 고온고압의 기체상태로 압축된 냉매를 이송시키는 압축기(11)에 실내측열교환기(13a,13b,13c)와 같은 수로 분 기 되 도록 솔 레 노 이 드 밸 브(14 a,14b,14 c ) 가 연 결 되 고, 이 솔레노이드밸브(14a,14b,14c)에 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시킬 수 있도록 각각 직렬로 실외측열교환기(la,lb,1c)가 연결되며, 이 실외측열교환기(la,lb,1c)에 각각 직렬로 2방향밸브(15a,15b,15c) 및 연결배관(16a,16b,16c)이 연결됨과 더불어, 이 연결배관(16a,16b,16c)을 통해 공급된 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 각각 직렬로 3개의 실내측열교환기(13a,13b,13c)가 연결되며, 이 실내측열교환기 (13a,13b,13c)에 각각 직렬로 연결되어 냉각된 저온저압의 기체냉매를 1개의 압축기(11)로 보낼수 있도록 2방향밸브(18a,18b,18c)가 설치된 구조로 되어 있다.The refrigerant control apparatus according to the present invention is a refrigerant control apparatus for a refrigeration cycle in which a compressor 11 for transferring a refrigerant compressed in a gaseous state at a high temperature and a high pressure is divided into the same number as that of the indoor heat exchangers 13a, 14b and 14c are connected to the solenoid valves 14a, 14b and 14c so that the refrigerant can be liquefied by the air blown by the cooling fan to the solenoid valves 14a, 14b and 14c, way valves 15a, 15b and 15c and connection pipes 16a, 16b and 16c are connected in series to the outdoor heat exchangers la, lb and 1c, respectively, The temperature difference between the inlet and outlet sides of the indoor heat exchangers 13a, 13b, and 13c supplied through the connection pipes 16a, 16b, and 16c is input to the microcomputer as an equation, 2b, and 2c for controlling the flow rate by controlling the valve spindle by rotating the electronic expansion valves 2a, 2b, and 2c, and three electronic expansion valves 2a, 2b, The indoor heat exchangers 13a, 13b and 13c are connected to each other and are connected in series to the indoor heat exchangers 13a, 13b and 13c so that the cooled low-temperature and low-pressure gas refrigerant can be sent to one compressor 11. [ Two-way valves 18a, 18b, 18c are provided.

이러한 멀티에어컨의 냉매제어는, 압축기(11)에 의해 고온고압으로된 냉매를 실내측열교환기(13a,13b,13c)의 갯수와 갖은 수로 설치된 솔레노이드밸브(14a,14b,14c)에 의해 분기시키는 냉매분리단계와, 이 솔레노이드밸브(14a,14b,14c)를 통해 공급된 냉매가 직렬로 연결된 실외측열교환기(la,lb,1c)에 유입되면 실외측열교환기(12)에서는 고온고압으로 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 갯수의 2방향밸브(15a,15b,15c)와 연결배관(16a,16b,16c) 및 전폐/전개가 가능한 전자식팽창밸브(2a,2b,2c)를 통과하면서 저온 저압의 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 실내때에 의해 송풍되는 공기에서 열을 빼앗아 실내공기를 냉각시킨 다음 그 냉각된 공기를 실내로 토출시켜 냉방을 랭하고 상기 실내측열교환기(13a,13b,13c)에서 냉각된 저온저압의 기체냉매는 2방향밸브(18a,18b,18c)를 통해서 다시 압축기(11)로 흡임하는 흡임단계로 이루어져 반복순환하는 냉동싸이클을 명성한다.This refrigerant control of the multi-type air conditioner is carried out in such a manner that the refrigerant which has been brought to high temperature and high pressure by the compressor 11 is branched by the number of the solenoid valves 14a, 14b, 14c provided with the number of the indoor heat exchangers 13a, 13b, 13c When the refrigerant supplied through the solenoid valves 14a, 14b and 14c flows into the outdoor heat exchangers la, lb and 1c connected in series, the outdoor heat exchanger 12 compresses the refrigerant at a high temperature and a high pressure And the liquid refrigerant liquefied in the outdoor heat exchangers (1a, 1b, 1c) is cooled by the indoor heat exchangers (13a, 2b and 2c, which are capable of fully closing / expanding, through the same number of two-way valves 15a, 15b and 15c as those of the low-temperature low-pressure The refrigerant is decompressed into free refrigerant and introduced into the three indoor heat exchangers (13a, 13b, 13c) at the same time In this indoor heat exchanger (13a, 13b, 13c), the low-temperature low-pressure free-phase refrigerant decompressed by the electronic expansion valves (2a, 2b, 2c) evaporates and vaporizes while passing through a plurality of pipes, The low-temperature low-pressure gas refrigerant cooled in the indoor heat exchangers (13a, 13b, 13c) is cooled by the two-way valve 18a, 18b, and 18c, and then sucking the refrigerant to the compressor 11 through the suction step.

이와 같이 구성된 본 발명의 실시예에 의한 냉매흐름과 그에 따른 효과를 다음에 설명한다.The refrigerant flow according to the embodiment of the present invention thus configured and its effect will be described below.

상기 압축기(11)를 통과한 고온고압의 냉매가스는 3개의 솔레노이드밸브(14a,14b,14c)와 실외측열교환기(la,lb,1c)를 거쳐 액상의 냉매상태로 되고, 이 액상냉매는 상기 연결배관(16a,16b,16c)을 통하여 전자식팽창밸브(2a,2b,2c)에 의해 감압팽창되어 각각 실외측열교환기(la,lb,1c)와 직렬연결된 실내측열교환기(13a,13b,13c)에서 증발된 뒤 압축기(11)로 순환되게 된다.The high-temperature and high-pressure refrigerant gas that has passed through the compressor 11 passes through the three solenoid valves 14a, 14b and 14c and the outdoor heat exchangers la, lb and 1c to become a liquid refrigerant state, The indoor heat exchangers (13a, 13b) connected in series to the outdoor heat exchangers (1a, 1b, 1c) are connected to the outdoor heat exchangers (1a, 1b, 1c) via the connection pipes (16a, 16b, 16c) , 13c, and then circulated to the compressor (11).

이때 실내측열교환기(13a,13b,13c)의 운전수에 따라 실외측열교환기(1a,1b,1c)의 솔레노이드밸브(14a,14b,14c)와 전자식팽창 밸브(2a,2b,2c)가 연동하여 동작하게 된다.At this time, the solenoid valves 14a, 14b and 14c of the outdoor heat exchangers 1a, 1b and 1c and the electronic expansion valves 2a, 2b and 2c are interlocked with the operation of the indoor heat exchangers 13a, 13b and 13c .

이상 설명한 바와 같이 본 발명에 의하면, 상기 실내측열교환기(13a,13b,13c)의 수와 같게 실외측열교환기(1a,1b,1c)를 설치하여 냉매를 제어함으로써,1실 운전시와 다실 운전시의 실내측열교환기들간의 냉각 능력차이를 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, the outdoor heat exchangers (1a, 1b, 1c) are provided in the same manner as the indoor heat exchangers (13a, 13b, 13c) to control the refrigerant, It is possible to minimize the difference in cooling ability between the indoor side heat exchangers at the time of operation and to achieve an optimal refrigeration cycle and to maintain the indoor heat exchanger 13a, 13b, 13c used in the indoor side heat exchangers There is an effect that the gas is not frozen.

Claims (1)

고온고압의 기체상태로 압축된 기체냉매를 이송시키는 압축기에 실내측열교환기와 같은 수로 분기되도록 솔레노이드밸브가 연결되고, 이 솔레노이드밸브에 냉각팬에 의해 송풍되는 공기로 냉매를 냉각시켜 액화시킬 수 있도록 각각 직렬로 실외측열교환기가 연결되며, 이 실외측열교환기에 각각 직렬로 2방향밸브 및 연결배관이 연결됨과 더불어,A solenoid valve is connected to the compressor for feeding gas refrigerant compressed in a gaseous state at a high temperature and a high pressure to the same number as that of the indoor heat exchanger and the refrigerant is cooled by the air blown by the cooling fan to the solenoid valve, The outdoor heat exchanger is connected in series, the two-way valve and the connection pipe are connected in series to the outdoor heat exchanger, 이 연결배관을 통해 공급된 실내측열교환기의 입.출구측 온도차이를 마이컴에 수식으로 입력하여 마이컴의 신호에 의하여 밸브의 모타를 의전시켜 밸브스핀들을 제어함으로써 유량을 제어하는 전자식팽창밸브가 연결되고, 이 전자식팽창밸브와 각각 직렬로 3개의 실내측열교환기가 연결되며, 이 실내측열교환기에 각각 직렬로 연결되어 냉각된 저온저압의 기체냉매를 1개의 압축기로 보낼수 있도록 2방향밸브가 설치된 구성의 멀티에어컨의 냉매제어장치.An electronic expansion valve for controlling the flow rate is provided by controlling the valve spindle by inputting the temperature difference between the inlet and outlet sides of the indoor heat exchanger supplied through the connection pipe into the microcomputer, Way valve is connected to each of the indoor heat exchangers in series and connected to the indoor heat exchanger in series so that the cooled low-temperature and low-pressure gas refrigerant can be sent to one compressor. Refrigerant control device of multi air conditioner.
KR1019960032202A 1996-08-01 1996-08-01 Coolant control device of multi-airconditioner KR100191529B1 (en)

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