KR100390434B1 - Control method of refrigerant-return for multiple air-conditioner - Google Patents
Control method of refrigerant-return for multiple air-conditioner Download PDFInfo
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- KR100390434B1 KR100390434B1 KR10-2001-0014880A KR20010014880A KR100390434B1 KR 100390434 B1 KR100390434 B1 KR 100390434B1 KR 20010014880 A KR20010014880 A KR 20010014880A KR 100390434 B1 KR100390434 B1 KR 100390434B1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
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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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
본 발명은 멀티에어컨의 냉매회수 제어방법을 개선하여, 냉매 및 오일 회수와 함께 사이클의 능력을 향상시키는데 그 목적이 있다.An object of the present invention is to improve a refrigerant recovery control method of a multi-air conditioner, and to improve the capacity of a cycle together with refrigerant and oil recovery.
이를 위해, 본 발명은 냉매의 상태를 이용하여 열교환을 수행하는 한 대의 실외기 및 다수대의 실내기와, 상기 실내기에 각각 연결된 팽창밸브를 갖는 멀티에어컨에 있어서, 상기 실내기 중 운전되는 실내기(운전 실내기)에 연결된 팽창밸브의 개도를 실내 외기의 부하에 따라 계산된 펄스값으로 조절하여 냉매를 순환시키는 A단계와, 상기 실내기 중 운전되지 않는 실내기(비운전 실내기)에 연결된 팽창밸브를 설정된 시간에 따라 순차적으로 개방하고 폐쇄하여 냉매를 순환시키는 B단계가 포함되어 이루어짐을 특징으로 하는 멀티에어컨의 냉매회수 제어방법을 제공한다.To this end, the present invention is a multi-air conditioner having one outdoor unit and a plurality of indoor units that perform heat exchange by using the state of the refrigerant, and an expansion valve connected to the indoor unit, respectively, in the indoor unit (operating indoor unit) which is operated among the indoor units A step of circulating the refrigerant by adjusting the opening degree of the connected expansion valve to the calculated pulse value according to the load of the indoor air, and the expansion valve connected to the indoor unit (non-operating indoor unit) which is not operated among the indoor units sequentially according to the set time. Provided is a refrigerant recovery control method for a multi-air conditioner comprising the step B of circulating the refrigerant by opening and closing.
Description
본 발명은 멀티에어컨에 관한 것으로서, 더 상세하게는 멀티에어컨의 오일 및 냉매를 회수하기 위한 제어방법에 관한 것이다.The present invention relates to a multi-air conditioner, and more particularly, to a control method for recovering oil and refrigerant of a multi-air conditioner.
일반적으로, 멀티에어컨은, 냉방능력과 난방능력을 겸비함과 함께, 실외기 한대 당 다수개의 실내기가 연결되어 실내기를 선택적으로 운전시킬 수 있는 기기이다.In general, a multi-air conditioner is a device capable of operating an indoor unit selectively by combining a plurality of indoor units per outdoor unit together with cooling and heating capability.
이하, 첨부된 도면을 참조하여, 일반적인 멀티에어컨의 구성을 살펴보면 다음과 같다.Hereinafter, with reference to the accompanying drawings, look at the configuration of a general multi-air conditioner.
멀티에어컨은, 도 1에 도시된 바와 같이, 냉매를 압축시키는 압축기(1)와, 냉매의 상태를 이용하여 열교환을 수행하는 한 대의 실외기(2) 및 다수대의 실내기(3)와, 상기 실내기에 각각 연결되어 냉매를 팽창시키는 팽창밸브(4)가 포함되어 이루어진다.As shown in FIG. 1, the multi-air conditioner includes a compressor (1) for compressing a refrigerant, one outdoor unit (2) and a plurality of indoor units (3) for performing heat exchange using the state of the refrigerant, and the indoor unit. An expansion valve 4 is connected to each other to expand the refrigerant.
상기와 같이 이루어진 멀티에어컨은 다음과 같은 동작을 수행한다.The multi-air conditioner made as described above performs the following operations.
첫째, 냉방 운전시, 압축기(1)에서 압축된 기상냉매는 실외기(2)를 거치면서 실외공기와 열교환을 하여 액상냉매로 상전환되고, 팽창밸브(4)를 거치면서 압력이 하강되며, 실내기(4)를 거치면서 실내공기와 열교환을 하여 기상냉매로 상전환된 후 압축기로 유입된다.First, during the cooling operation, the gaseous refrigerant compressed by the compressor (1) undergoes heat exchange with the outdoor air while passing through the outdoor unit (2), and is phase-converted to liquid refrigerant, and the pressure decreases through the expansion valve (4). After passing through (4), it exchanges with indoor air and is converted into gaseous refrigerant and then flows into the compressor.
둘째, 난방 운전시, 압축기(1)에서 압축된 기상냉매는 실내기(3)를 거치면서 실내공기와 열교환을 하여 액상냉매로 상전환되고, 팽창밸브(4)를 거치면서 압력이 하강되며, 실외기(2)를 거치면서 실외공기와 열교환을 하여 기상냉매로 상전환된 후 압축기로 유입된다.Second, during heating operation, the gaseous refrigerant compressed by the compressor (1) undergoes heat exchange with the indoor air while passing through the indoor unit (3), and is phase-converted to a liquid refrigerant, and the pressure decreases through the expansion valve (4). It passes through (2) and exchanges air with outdoor air and converts it into gaseous refrigerant and then flows into the compressor.
그러나, 상기와 같이 이루어진 멀티에어컨은 다음과 같은 문제점을 가지고 있다.However, the multi-air conditioner made as described above has the following problems.
냉방 운전시와는 달리 난방 운전시, 운전되고 있는 실내기(이하, 운전 실내기)의 대수가 변화하는 경우에 운전되지 않는 실내기(이하, 비운전 실내기)에 냉매및 오일이 쌓이게 되어, 기기 운전에 요구되는 냉매량이 부족하게 되는 냉매부족현상을 일으키게 되는 문제가 있다.Unlike cooling operation, refrigerant and oil accumulate in an indoor unit (hereinafter, non-operating indoor unit) that is not operated when the number of indoor units (hereinafter, indoor unit) being operated changes during heating operation. There is a problem that the refrigerant shortage phenomenon that the amount of refrigerant is insufficient.
따라서, 이를 방지하기 위해, 종래기술에서는 비운전 실내기측 팽창밸브를 항상 일정 개도 오픈시켜 기기를 운전시킴에 따라, 냉매순환이 이루어지게 되어 냉매부족현상을 막을 수 있었다.Therefore, in order to prevent this, according to the prior art to operate the device by always opening a certain number of non-operating indoor unit side expansion valve, the refrigerant circulation is made to prevent the refrigerant shortage phenomenon.
여기서, 종래기술을 구체적으로 설명하기 위해 도 2를 참조하면 다음과 같다.Here, with reference to FIG. 2 to describe the prior art in detail.
도면 설명에 앞서, 현재 운전되고 있는 실내기를 두 대라고 가정하고, 한 대의 실외기에 연결된 실내기는 총 n+2라고 가정하였으며, 도시된 Y1 펄스(pulse)와 Y2 펄스 그리고 X 펄스는 실외기(2)에서 실내기(3)로 냉매를 공급하기 위한 팽창밸브의 열림정도를 나타낸 것이다.Prior to the description of the drawings, it is assumed that there are two indoor units that are currently being operated, and that indoor units connected to one outdoor unit are assumed to have a total of n + 2, and the illustrated Y1 pulse, Y2 pulse, and X pulse are the outdoor units (2). Shows the opening degree of the expansion valve for supplying the refrigerant to the indoor unit (3).
결국, 종래기술의 멀티 에어컨은, 도 2에 도시된 바와 같이, 제1, 2 운전 실내기는 원래의 계산에 의해 결정된(실내/외 부하 변수에 의해 계산된) Y1 펄스, Y2 펄스 만큼 각각 열려 운전되고, 비운전 실내기는 기설정된 펄스인 X 펄스씩 열려서 난방운전중에 계속적인 제어가 이루어지도록 한 것이다As a result, the multi-air conditioner of the prior art, as shown in Fig. 2, the first and second operating indoor unit is opened by Y1 pulse, Y2 pulse respectively determined by the original calculation (calculated by the indoor / external load variable) The non-operating indoor unit opens X pulses, which are preset pulses, to continuously control during heating operation.
하지만, 상기와 같이 이루어진 종래기술은 다음과 같은 문제점을 가지고 있다.However, the prior art made as described above has the following problems.
비운전 실내기에 냉매 및 오일이 쌓이지 않도록 하기 위해, 난방운전중에 항상 냉매가 순환되도록 비운전 실내기에 각각 연결된 팽창밸브 모두를 X펄스값 만큼 열기 때문에, 비운전 실내기의 냉매순환이 동시에 일률적으로 이루어지게 되므로,사이클적으로 능력을 확보하기 위한 고압과 저압의 유지가 힘들게 된다. 결국, 사이클의 능력 및 토출공기온도를 적정하게 유지하는 것이 어렵게 된다.In order to prevent the refrigerant and oil from accumulating in the non-operating indoor unit, all of the expansion valves connected to the non-operating indoor unit are opened by the X pulse value so that the refrigerant is always circulated during the heating operation. Therefore, it is difficult to maintain the high pressure and low pressure to secure the ability cycle. As a result, it becomes difficult to properly maintain the cycle capacity and the discharge air temperature.
본 발명은 종래기술에 대한 문제점을 해결하기 위한 것으로서, 멀티에어컨의 냉매회수 제어방법을 개선하여, 냉매 및 오일 회수와 함께 사이클의 능력을 향상시키는데 그 목적이 있다.The present invention is to solve the problems of the prior art, and to improve the refrigerant recovery control method of the multi-air conditioner, the purpose is to improve the capacity of the cycle with the refrigerant and oil recovery.
도 1은 일반적인 멀티에어컨의 구성을 나타낸 블럭도.1 is a block diagram showing the configuration of a general multi-air conditioner.
도 2는 종래기술의 오일리턴 제어방법에 따른 실내기에 연결된 팽창밸브의 동작상태를 나타낸 상태도.Figure 2 is a state diagram showing the operating state of the expansion valve connected to the indoor unit according to the oil return control method of the prior art.
도 3은 본 발명의 오일리턴 제어방법에 따른 실내기에 연결된 팽창밸브의 동작상태를 나타낸 상태도.Figure 3 is a state diagram showing the operating state of the expansion valve connected to the indoor unit according to the oil return control method of the present invention.
도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings
2: 실외기 3: 실내기2: outdoor unit 3: indoor unit
4: 팽창밸브4: expansion valve
상기 목적을 달성하기 위해서, 본 발명은 냉매의 상태를 이용하여 열교환을 수행하는 한 대의 실외기 및 다수대의 실내기와, 상기 실내기에 각각 연결된 팽창밸브를 갖는 멀티에어컨에 있어서, 상기 실내기 중 운전되는 실내기(운전 실내기)에 연결된 팽창밸브의 개도를 실내 외기의 부하에 따라 계산된 펄스값으로 조절하여 냉매를 순환시키는 A단계와, 상기 실내기 중 운전되지 않는 실내기(비운전 실내기)에 연결된 팽창밸브를 설정된 시간에 따라 순차적으로 개방하고 폐쇄하여 냉매를 순환시키는 B단계가 포함되어 이루어짐을 특징으로 하는 멀티에어컨의 냉매회수 제어방법을 제공한다.In order to achieve the above object, the present invention is a multi-air conditioner having one outdoor unit and a plurality of indoor unit to perform heat exchange using the state of the refrigerant, and an expansion valve connected to the indoor unit, the indoor unit which is operated among the indoor unit ( A step of circulating the refrigerant by adjusting the opening degree of the expansion valve connected to the driving indoor unit to the pulse value calculated according to the load of the indoor outdoor air, and the expansion valve connected to the indoor unit (non-operating indoor unit) which is not operated among the indoor units. According to the present invention, a refrigerant recovery control method of a multi-air conditioner is provided, which includes a step B of sequentially circulating and circulating refrigerant.
이하, 첨부도면을 참조하여, 본 발명의 바람직한 실시예를 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
도 3은 본 발명의 오일리턴 제어방법에 따른 실내기에 연결된 팽창밸브의 동작상태를 나타낸 상태도이다.Figure 3 is a state diagram showing the operating state of the expansion valve connected to the indoor unit according to the oil return control method of the present invention.
도면 설명에 앞서, 멀티에어컨의 구성은 종래기술에 언급된 바 있으므로, 그설명을 생략하고, 종래기술과 동일한 구조에 한해서는 종래와 동일한 부호를 부여키로 한다.Prior to the description of the drawings, since the configuration of the multi-air conditioner has been mentioned in the prior art, the description thereof is omitted, and only the same structure as the prior art is given the same reference numeral.
본 발명에 따른 멀티에어컨의 냉매회수 제어방법은, 도 3에 도시된 바와 같이, 냉매의 상태를 이용하여 열교환을 수행하는 한 대의 실외기(2) 및 다수대의 실내기(3)와, 상기 실내기에 각각 연결된 팽창밸브(4)를 갖는 멀티에어컨에 있어서, 상기 실내기(3) 중 운전되는 실내기(운전 실내기)에 연결된 팽창밸브의 개도를 실내 외기의 부하에 따라 계산된 펄스값으로 조절하여 냉매를 순환시키는 A단계와, 상기 실내기 중 운전되지 않는 실내기(비운전 실내기)에 연결된 팽창밸브를 설정된 시간에 따라 순차적으로 개방하고 폐쇄하여 냉매를 순환시키는 B단계가 포함되어 이루어진다.Refrigerant recovery control method of the multi-air conditioner according to the present invention, as shown in Figure 3, one outdoor unit (2) and a plurality of indoor unit (3) and the indoor unit for performing heat exchange using the state of the refrigerant, respectively In a multi-air conditioner having an expansion valve (4) connected, the opening of the expansion valve connected to the indoor unit (operating indoor unit) of the indoor unit (3) is adjusted to a pulse value calculated according to the load of the indoor air to circulate the refrigerant. Step A and step B for circulating the refrigerant by sequentially opening and closing the expansion valve connected to the indoor unit (non-operating indoor unit) that is not operated among the indoor unit according to a set time.
이 때, 상기 A단계는 종래기술에 이미 언급된 것으로서, 두 대의 실내기가 운전될 경우, 두 대의 운전 실내기에 각각 연결된 팽창밸브의 개도를 원래의 계산에 의해 결정된(실내/외 부하 변수에 의해 계산된) Y1 펄스와, Y2 펄프만큼 열어서 운전시키는 단계이다.At this time, the step A is already mentioned in the prior art, when two indoor units are operated, the opening degree of the expansion valves respectively connected to the two operating indoor units is determined by the original calculation (calculated by the indoor / external load variables). Y1 pulse and Y2 pulp are opened and operated.
그리고, 상기 B단계는, 상기 비운전 실내기의 대수가 n대라고 가정할 경우, 제1 비운전 실내기에 연결된 팽창밸브를 제1 시간 동안 개방(O)함과 동시에, 나머지 비운전 실내기에 연결된 팽창밸브를 제1 시간 동안 폐쇄(C)하는 단계와; 상기 제1 시간이 경과한 후, 상기 n대의 비운전 실내기에 각각 연결된 팽창밸브 모두를 제2 시간동안 폐쇄(C)하는 단계와; 상기 단계 후, 제2 비운전 실내기에 연결된 팽창밸브를 제1 시간 동안 개방(O)함과 동시에, 나머지 비운전 실내기에 연결된 팽창밸브를 제1 시간 동안 폐쇄(C)하는 단계와; 상기 제1 시간이 경과한 후, 상기 n대의 비운전 실내기에 각각 연결된 팽창밸브 모두를 제2 시간동안 폐쇄(C)하는 단계와;......; 계속적으로, 제n 비운전 실내기에 연결된 팽창밸브를 제1 시간 동안 개방(O)함과 동시에, 나머지 비운전 실내기에 연결된 팽창밸브를 제1 시간 동안 폐쇄(C)하는 단계와; 상기 제1 시간이 경과한 후, 상기 n대의 비운전 실내기에 각각 연결된 팽창밸브 모두를 제2 시간동안 폐쇄(C)하는 단계가 포함되어, 순차적으로 진행됨이 바람직하다.In the step B, when the number of the non-operating indoor units is n, the expansion valve connected to the first non-operating indoor unit is opened (O) for a first time and the expansion connected to the remaining non-operating indoor unit is performed. Closing (C) the valve for a first time; Closing (C) all of the expansion valves respectively connected to the n non-operating indoor units for a second time after the first time elapses; After said step, opening (O) the expansion valve connected to the second non-operating indoor unit for a first time and closing (C) the expansion valve connected to the remaining non-operating indoor unit for a first time; After the first time has elapsed, closing all expansion valves respectively connected to the n non-operating indoor units for a second time (C); Continuously opening (O) the expansion valve connected to the nth non-driving indoor unit for a first time and closing (C) the expansion valve connected to the remaining non-driving indoor unit for a first time; After the first time has elapsed, the step (C) of closing all the expansion valves respectively connected to the n non-operation indoor units for a second time is preferably included, and proceeds sequentially.
이와 더불어, 상기 제1 비운전 실내기에서 상기 제n 비운전 실내기까지 상기 단계가 순차적으로 수행된 후, 운전용량이 변화될 때까지 상기 단계들을 반복 수행하는 단계가 더 포함되어 이루어짐이 바람직하며, 운전용량이 변화될 경우에는, 상기 제1 시간과 상기 제2 시간이 재설정되어 상기 단계를 재설정된 시간에 맞게 수행함이 바람직하다.In addition, after the steps are sequentially performed from the first non-operation indoor unit to the n-th non-operation indoor unit, it is preferable to further include repeating the steps until the driving capacity is changed. When the capacity is changed, it is preferable that the first time and the second time are reset to perform the step according to the reset time.
여기서, 상기 제1 시간은, 상기 비운전 실내기의 총용량에 따라 최소 냉매가 회수되도록 결정되는 시간(T1)이고; 상기 제2 시간은, 상기 비운전 실내기의 총대수에 따라 최소 냉매가 회수되도록 결정되는 시간(T2)에서 상기 제1 시간(T1)을 뺀 시간임이 바람직하다.Here, the first time is a time T1 determined to recover the minimum refrigerant according to the total capacity of the non-operating indoor unit; Preferably, the second time is a time obtained by subtracting the first time T1 from a time T2 determined to recover the minimum refrigerant according to the total number of the non-operating indoor units.
더 구체적으로, T1은 비운전 실내기의 총용량과 T2와의 함수관계인(여기서,,,는 비례상수)의 식으로 계산되어질 수 있다. 하지만, 반드시 1차적으로 계산되는 함수일 필요는 없다.More specifically, T1 is a function of the total capacity of the non-driving indoor unit and T2. (here, , , Can be calculated by the formula of proportionality constant). However, it does not have to be a function that is calculated first.
그리고, T2는 비운전 실내기의 총대수와의 함수관계인(여기서,,는 비례상수)의 식으로 계산되어질 수 있다. 하지만, 반드시 1차적으로 계산되는 함수일 필요는 없다.T2 is a function of the total number of non-driving indoor units. (here, , Can be calculated by the formula of proportionality constant). However, it does not have to be a function that is calculated first.
결국, 상기와 같이 비운전 실내기에 각각 연결된 팽창밸브를 순차적으로 열고 닫음을 병행함에 따라, 각 비운전 실내기의 냉매를 회수하는데에 문제가 없으며, 특히 난방 운전시, 종래의 일률적으로 모든 비운전 실내기의 팽창밸브를 소정량 열때와는 다르게, 비운전 실내기에 연결된 팽창밸브가 열릴 때의 압력과 닫힐 때의 압력 차가 확연히 나타나게 되므로, 즉 고압과 저압의 차를 유지할 수 있게되므로, 사이클의 능력을 향상시킬 수 있고, 토출공기온도의 저하를 미연에 막을 수 있다.As a result, there is no problem in recovering the refrigerant of each non-operating indoor unit by simultaneously opening and closing expansion valves connected to the non-operating indoor units sequentially as described above. Unlike opening a certain amount of expansion valve, the difference between the pressure when the expansion valve connected to the non-operating indoor unit is opened and the pressure when closing is clearly displayed, that is, it is possible to maintain the difference between the high pressure and the low pressure, thereby improving the cycle performance. It is possible to reduce the discharge air temperature in advance.
이제까지 본 발명에 대하여 그 바람직한 실시예를 중심으로 살펴보았으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 본 발명의 본질적 기술 범위 내에서 상기 본 발명의 상세한 설명과 다른 형태의 실시예들을 구현할 수 있을 것이다. 여기서 본 발명의 본질적 기술 범위는 특허청구범위에 나타나 있으며, 그와 동등한 범위 내에 있는 모든 차이점은 본 발명에 포함된 것으로 해석되어야 할 것이다.So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.
이상에서와 같이, 본 발명은 비운전 실내기에 각각 연결된 팽창밸브를 순차적으로 열고 닫음을 병행하도록 한 멀티에어컨의 냉매회수 제어방법으로서, 다음과같은 효과가 있다.As described above, the present invention is a refrigerant recovery control method of a multi-air conditioner to open and close expansion valves connected to the non-operating indoor units, respectively, in order to have the following effects.
첫째, 비운전 실내기의 냉매가 효과적으로 회수됨에 따라, 냉매부족현상을 미연에 막을 수 있다.First, as the refrigerant of the non-operating indoor unit is effectively recovered, the shortage of refrigerant can be prevented in advance.
둘째, 난방 운전시, 종래의 일률적으로 모든 비운전 실내기의 팽창밸브를 소정량 열때와는 다르게, 비운전 실내기에 연결된 팽창밸브가 열릴 때의 압력과 닫힐 때의 압력 차가 확연히 나타나게 되므로, 즉 고압과 저압의 차를 유지할 수 있게되므로, 사이클의 능력을 향상시킬 수 있고, 토출공기온도의 저하를 미연에 막을 수 있다.Second, in the heating operation, the pressure difference when the expansion valve connected to the non-operation indoor unit is opened and the pressure difference when the expansion valve connected to the non-operation indoor unit is different from the case of opening the expansion valves of all non-operation indoor units uniformly, that is, Since the low pressure difference can be maintained, the cycle capacity can be improved, and the drop in discharge air temperature can be prevented.
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| KR880011537A (en) * | 1987-03-20 | 1988-10-28 | 미다 가쓰시게 | Multi-room air conditioner |
| JPH0213760A (en) * | 1988-06-30 | 1990-01-18 | Toshiba Corp | Controller for multiple air-conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR880011537A (en) * | 1987-03-20 | 1988-10-28 | 미다 가쓰시게 | Multi-room air conditioner |
| JPH0213760A (en) * | 1988-06-30 | 1990-01-18 | Toshiba Corp | Controller for multiple air-conditioning system |
| KR900000660A (en) * | 1988-06-30 | 1990-01-31 | 아오이 죠이찌 | Control device of multi air conditioner system |
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