KR100374815B1 - Prevention method of refrigerant accumulation in multi a/c - Google Patents
Prevention method of refrigerant accumulation in multi a/c Download PDFInfo
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- KR100374815B1 KR100374815B1 KR10-1999-0026771A KR19990026771A KR100374815B1 KR 100374815 B1 KR100374815 B1 KR 100374815B1 KR 19990026771 A KR19990026771 A KR 19990026771A KR 100374815 B1 KR100374815 B1 KR 100374815B1
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
- F25B2500/00—Problems to be solved
- F25B2500/24—Low amount of refrigerant in the system
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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 발명 멀티에어컨의 액축적방지방법은 다수개의 증발기(16)가 구비되는 멀티에어컨에서 증발기(16)와 냉매회수라인(17)을 연결하는 연결라인(14) 상에 냉매유입차단밸브(21)를 각각 설치하여, 비가동되는 증발기(16)와 연결라인(14)에 액냉매가 유입되어 축적되는 것을 차단하게 되고, 그에 따른 장비전체의 냉매부족현상이 발생되는 것을 방지하는 효과가 있고, 이와 같이 다수개의 증발기(16)가 구비되는 멀티에어컨의 운전시 비가동되는 증발기(16)에 연결되어 있는 팽창밸브(13) 및 냉매유입차단밸브(21)를 열고 일정시간동안 비가동되는 증발기(16)를 가동시켜서 증발기(16)와 연결라인(14)에 축적되어 있던 액냉매를 회수하는 냉매회수운전을 실시함으로서, 냉매감소에 의한 압축기의 소손을 방지하는 효과가 있다.The liquid accumulation prevention method of the multi-air conditioner of the present invention is a refrigerant inlet shutoff valve (21) on a connection line (14) connecting the evaporator (16) and the refrigerant recovery line (17) in a multi-air conditioner having a plurality of evaporators (16). By installing the respective, to prevent the liquid refrigerant flows into the evaporator 16 and the connection line 14 that is inactive to accumulate, there is an effect to prevent the occurrence of the refrigerant shortage of the entire equipment accordingly, and As described above, the expansion valve 13 and the refrigerant inlet blocking valve 21 which are connected to the non-operating evaporator 16 during operation of the multi-air conditioner having the plurality of evaporators 16 are opened, and the evaporator 16 is inactive for a predetermined time. By operating the coolant recovery operation for recovering the liquid refrigerant accumulated in the evaporator 16 and the connecting line 14, the compressor is prevented from being burned out due to the decrease of the coolant.
Description
본 발명은 멀티에어컨의 액축적방지방법에 관한 것으로, 특히 비사용중인 증발기와 배관내에 냉매가 액체상태로 축적되어 장비 전체에 냉매량 부족현상이 발생되는 것을 방지하도록 하는데 적합한 멀티에어컨의 액축적방지방법에 관한 것이다.The present invention relates to a method for preventing accumulation of liquid in a multi-air conditioner, and in particular, a method for preventing accumulation of liquid in a multi-air conditioner suitable for preventing the refrigerant from being accumulated in a liquid state in a non-used evaporator and a pipe and preventing a shortage of refrigerant in the entire equipment. It is about.
일반적으로 실내기가 되는 증발기가 2개이상 많게는 10개이상 부착되어 10실이상이 되는 에어컨을 멀티에어컨이라고 하며, 이와 같은 종래 멀티에어컨의 한 형태가 도 1에 도시되어 있는 바, 이를 간단히 설명하면 다음과 같다.In general, an air conditioner having two or more evaporators that become indoor units and ten or more attached to ten or more rooms is called a multi-air conditioner. A form of the conventional multi-air conditioner is illustrated in FIG. 1. Same as
도 1은 종래 멀티에어컨의 구성을 개략적으로 보인 배관도로서, 도시된 바와 같이, 종래의 멀티에어컨은 압축기(1)와 응축기(2)가 냉매공급라인(3)으로 연결되어 있고, 그와 같이 연결된 응축기(2)에는 병렬로 3개의 팽창밸브(4:4-1,4-2,4-3)와 증발기(5:5-1,5-2,5-3)가 설치되어 있으며, 증발기(5)들은 다시 압축기(1)에 냉매회수라인(6)으로 연결되어 있다.FIG. 1 is a schematic view showing a configuration of a conventional multi-air conditioner. As shown in the drawing, a conventional multi-air conditioner has a compressor 1 and a condenser 2 connected to a refrigerant supply line 3, and thus connected. The condenser (2) is provided with three expansion valves (4: 4-1,4-2,4-3) and evaporators (5: 5-1,5-2,5-3) in parallel. 5 are again connected to the compressor 1 by the refrigerant recovery line 6.
상기와 같이 구성되어 있는 종래 멀티에어컨은 저온저압의 기체냉매는 압축기(1)에서 고온고압으로 변화되고, 그와 같은 고온고압의 기체냉매는 냉매공급라인(3)을 통하여 응축기(2)로 보내져서 응축기(2)에서 액체상태로 변화되며, 그와 같이 변화된 액체상태의 냉매는 팽창밸브(4)들을 통과하면서 저온저압으로 변환되고, 그와 같은 저온 저압의 냉매는 실내기가 되는 증발기(5)들을 지나면서 저온저압의 기체상태로 변화되어 외부의 열을 흡수하며 냉방이 이루어진다.In the conventional multi-air conditioner configured as described above, the low temperature low pressure gas refrigerant is changed from the compressor 1 to the high temperature and high pressure, and the high temperature and high pressure gas refrigerant is sent to the condenser 2 through the refrigerant supply line 3. Is converted into a liquid state in the condenser (2), and the changed liquid state refrigerant is converted to low temperature low pressure while passing through the expansion valve (4), and such low temperature low pressure refrigerant is an evaporator 5 which becomes an indoor unit. As they pass through, they change to a low-temperature, low-pressure gas state to absorb external heat and cool.
그리고, 상기와 같이 증발기(5)들을 통과한 저온저압의 기체냉매는 다시 냉매회수라인(6)을 통하여 압축기(1)로 회수되게 된다.As described above, the low-temperature low-pressure gas refrigerant passing through the evaporators 5 is recovered to the compressor 1 through the refrigerant recovery line 6 again.
그러나, 종래의 멀티에어컨은 실내기인 증발기(5)들을 항상 전부 사용하는 것은 아니고, 가령 1대의 증발기(5-1)는 사용을 하고, 나머지 2대의 증발기(5-2,5-3)를 장기간 사용하지 않는 경우에 그 비사용중인 증발기(5-2,5-3)와 전,후방측의 연결라인(5a)들의 내부에는 냉매회수라인(6)을 통하여 회수되던 냉매가 역류되어 상당량의 냉매가 액체상태로 존재하게 되며, 그와 같이 존재하는 냉매에 의하여 장비 전체가 냉매부족현상이 발생되어 냉방능력의 저하를 초래하는 문제점이 있었다.However, the conventional multi-air conditioner does not always use all of the evaporators 5, which are indoor units, for example, one evaporator 5-1 is used, and the remaining two evaporators 5-2, 5-3 are used for a long time. When not in use, the refrigerant recovered through the refrigerant recovery line 6 flows back into the non-used evaporators 5-2 and 5-3 and the front and rear connection lines 5a so that a considerable amount of refrigerant is returned. Is present in the liquid state, there is a problem that the entire equipment is caused by the lack of refrigerant due to the refrigerant present in such a state that the cooling capacity is reduced.
또한, 상기와 같이 액체상태로 비사용중인 증발기(5-2,5-3)들과 연결라인(5a)들에 냉매가 축적되는 경우에 압축기(1)에서 냉매를 흡입하기 위한 저압부의 압력이 급격히 강하하여 압축기(1)의 냉매 흡입부(미도시)에 성애가 발생되고 그 성애에 의하여 압축기(1)의 내부로 냉매가 회수되지 못하여 역시 냉매부족현상을 가중시키는 원인이 되는 문제점이 있었다.In addition, when the refrigerant accumulates in the evaporators 5-2 and 5-3 and the connection lines 5a which are not in a liquid state as described above, the pressure of the low pressure part for sucking the refrigerant in the compressor 1 There is a problem in that a sudden drop is generated in the refrigerant suction unit (not shown) of the compressor 1 and the refrigerant is not recovered to the inside of the compressor 1 due to the love, which also causes a shortage of refrigerant.
상기와 같은 문제점을 감안하여 안출한 본 발명의 목적은 비사용중인 증발기와 연결라인에 냉매가 축적되는 것을 방지하여 냉매부족현상이 발생되는 것을 방지하도록 하는데 적합한 멀티에어컨의 액축적방지방법을 제공함에 있다.SUMMARY OF THE INVENTION An object of the present invention devised in view of the above problems is to provide a method for preventing the accumulation of liquids in a multi-air conditioner, which is suitable to prevent the refrigerant shortage from occurring by preventing the refrigerant from accumulating in the connection line of the evaporator which is not in use. have.
도 1은 종래 멀티에어컨의 구성을 보인 배관도.1 is a piping diagram showing the configuration of a conventional multi-air conditioner.
도 2는 본 발명 액축적방지장치가 설치된 멀티에어컨의 구성을 보인 배관도.Figure 2 is a piping diagram showing the configuration of a multi-air conditioner equipped with the present invention accumulation accumulation prevention device.
도 3은 본 발명의 액축적방지장치의 실시예를 보인 상세도.Figure 3 is a detailed view showing an embodiment of the liquid accumulation prevention apparatus of the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
11 : 압축기 12 : 응축기11: compressor 12: condenser
14 : 연결라인 16 : 증발기14 connection line 16 evaporator
17 : 냉매회수라인 21 : 냉매유입차단밸브17: refrigerant recovery line 21: refrigerant inlet shutoff valve
22 : 압력검출센서 23 : 콘트롤러22: pressure detection sensor 23: controller
상기와 같은 본 발명의 목적을 달성하기 위하여 1개의 응축기와 여러개의 증발기를 구비하여 일시에 여러개의 증발기를 가동하거나, 여러개의 증발기중 1개 또는 그 이상을 선택적으로 가동하는 멀티에어컨의 운전방법에 있어서,상기 증발기들을 선택적으로 가동할때에 압축기의 흡입압력의 변화를 검출하여 설정치를 벗어나는 경우에 비사용중인 증발기들까지 전부 일정시간 가동하여 비사용중인 증발기와 연결라인들에 존재하는 냉매가 압축기로 회수되도록 하는 냉매회수운전을 실시하는 것을 특징으로 하는 멀티에어컨의 액축적방지방법이 제공된다.In order to achieve the above object of the present invention, there is provided a condenser and a plurality of evaporators to operate a plurality of evaporators at a time, or a method of operating a multi-air conditioner selectively operating one or more of a plurality of evaporators. In this case, when the evaporators are selectively operated, a change in suction pressure of the compressor is detected and when the deviation is out of the set value, all the evaporators which are not in use are operated for a predetermined time so that the refrigerant present in the non-use evaporator and the connecting lines is compressed. There is provided a liquid accumulation prevention method for a multi-air conditioner, characterized in that for performing a refrigerant recovery operation to recover the air.
이하, 상기와 같은 본 발명 멀티에어컨의 액축적방지방법을 첨부된 도면의 실시예를 참고하여 보다 상세히 설명하면 다음과 같다.Hereinafter, the liquid accumulation prevention method of the present invention multi-air conditioner will be described in more detail with reference to embodiments of the accompanying drawings.
도 2는 본 발명 액축적방지장치가 설치된 멀티에어컨의 구성을 보인 배관도로서, 도시된 바와 같이, 냉매를 압축하기 위한 압축기(11)와 응축하기 위한 응축기(12)가 냉매공급라인(13)으로 연결되어 있고, 그 냉매공급라인(13)에 연결된 연결라인(14)에는 병렬로 3개의 팽창밸브(15:15-1,15-2,15-3)와 증발기(16:16-1,16-2,16-3)가 설치되어 있으며, 그 연결라인(14)들은 다시 압축기(11)에 연결된 냉매회수라인(17)에 연결되어 있다.2 is a piping diagram showing a configuration of a multi-air conditioner in which the liquid accumulation prevention apparatus of the present invention is installed. As shown in FIG. 2, a compressor 11 for compressing a refrigerant and a condenser 12 for condensing the refrigerant are supplied to the refrigerant supply line 13. Three expansion valves (15: 15-1,15-2,15-3) and an evaporator (16: 16-1,16) in parallel with the connection line (14) connected to the refrigerant supply line (13). -2, 16-3 are installed, and the connection lines 14 are connected to the refrigerant recovery line 17 connected to the compressor 11 again.
그리고, 상기 증발기(16)의 후방 연결라인(14) 상에는 비사용중인 증발기(16)와 연결라인(14)으로 냉매가 유입되는 것을 차단하기 위한 냉매유입차단밸브(21:21-1,21-2,21-3)가 설치되어 있다.In addition, the refrigerant inlet shutoff valves 21: 21-1 and 21-for blocking the introduction of the refrigerant into the non-use evaporator 16 and the connection line 14 on the rear connection line 14 of the evaporator 16. 2,21-3) are installed.
도 3은 상기 냉매유입차단밸브의 제어되는 상태를 상세히 보인 것으로, 도시된 바와 같이, 상기 압축기(11)의 흡입측에는 압축기(11)로 흡입되는 냉매의 압력을 검출하기 위한 압력검출센서(22)가 설치되어 있고, 그 압력검출센서(21)는 콘트롤러(23)에 연결되어 있다.3 is a detailed view illustrating a controlled state of the refrigerant inlet blocking valve. As illustrated, a pressure detection sensor 22 for detecting a pressure of a refrigerant sucked into the compressor 11 is provided at the suction side of the compressor 11. Is installed, the pressure detection sensor 21 is connected to the controller (23).
상기와 같이 구성되어 있는 본 발명 액축적방지장치가 설치된 멀티에어컨의 운전방법을 설명하면 다음과 같다.Referring to the operation method of the multi-air conditioner equipped with the present invention accumulation accumulation device configured as described above is as follows.
먼저, 실내기인 증발기(16)들이 모두 사용되는 상태를 설명한다.First, a state in which all of the evaporators 16 which are indoor units are used will be described.
이때는 저온저압의 기체냉매가 압축기(11)에서 고온고압으로 변화되고, 그와 같은 고온고압의 기체냉매는 냉매공급라인(13)을 통하여 응축기(12)로 보내져서 응축기(12)에서 액체상태로 변화되며, 그와 같이 변화된 액체상태의 냉매는 전체의 팽창밸브(15)들을 통과하면서 저온저압으로 변환되고, 그와 같은 저온 저압의 냉매는 실내기가 되는 모든 증발기(16)들을 지나면서 저온저압의 기체상태로 변화되어 외부의 열을 흡수하며 냉방이 이루어진다.At this time, the low-temperature low-pressure gas refrigerant is changed to a high temperature and high pressure in the compressor (11), such a high-temperature high-pressure gas refrigerant is sent to the condenser 12 through the refrigerant supply line 13 to the liquid state in the condenser 12 The liquid refrigerant in such a changed state is converted to low temperature and low pressure while passing through the entire expansion valve 15, and such low temperature and low pressure refrigerant passes through all the evaporators 16 that become the indoor unit. It changes to gaseous state to absorb external heat and to cool.
다음은, 1대의 증발기(16-1)만 가동할때의 운전방법을 설명한다.The following describes the operation method when only one evaporator 16-1 is operated.
1대의 증발기(16-1)만을 가동하는 경우에는 비가동되는 나머지 증발기(16-2,16-3)들의 후방에 각각 설치되어 있는 냉매유입차단밸브(21-2,21-3)들은 닫아서 비가동중인 증발기(16-2,16-3)들의 후방으로 연결되는 연결라인(14)을 통하여 냉매회수라인(17)에서 냉매가 증발기(16-2,16-3)와 연결라인(14)으로 유입되는 것을 차단하게 된다.When only one evaporator 16-1 is operated, the refrigerant inlet shutoff valves 21-2 and 21-3 installed at the rear of the remaining non-operating evaporators 16-2 and 16-3 are closed and the rain is closed. Refrigerant from the refrigerant recovery line 17 to the evaporator 16-2, 16-3 and the connection line 14 through the connection line 14 connected to the rear of the evaporator (16-2, 16-3) in motion It blocks the inflow.
그리고, 증발기(16)들중 1대의 증발기(16-1)만 일정시간 이상 가동하게되면 비가동되는 나머지 증발기(16-2,16-3)들과 연결라인(14)들의 내부에 액냉매가 축적되어 냉매회수라인(17)으로 회수되는 냉매의 양이 감소되고, 그와 같이 냉매의 양이 감소되면 압축기(11)의 흡입부측의 압력이 점차 저하되는데, 이를 상기 압력검출센서(22)에서 검출하고, 그 검출된 압력값을 콘트롤러(23)에서 설정값과 비교하여 설정값 이하가 되는 경우에는 비가동중이던 팽창밸브(15-2,15-3)와 냉매유입차단밸브(21-2,21-3)를 열고 증발기(16-2,16-3)들을 가동하여 일정시간 동안 냉매회수운전을 실시함으로서 비가동중이던 증발기(16-2,16-3)와 연결라인(14)들에 정체되어있던 액냉매들을 회수한 다음, 다시 1대의 증발기(16-1)만을 가동하는 방법으로 비가동되는 증발기(16-2,16-3) 및 그 연결라인(14)에 많은 양의 액냉매가 축적되는 것을 차단한다.In addition, when only one evaporator 16-1 of the evaporators 16 is operated for a predetermined time or more, the liquid refrigerant is stored inside the remaining evaporators 16-2 and 16-3 and the connection line 14 which are not operated. The amount of refrigerant accumulated and recovered in the refrigerant recovery line 17 decreases, and when the amount of refrigerant decreases, the pressure on the suction side of the compressor 11 gradually decreases, and the pressure detection sensor 22 When the detected pressure value is less than the set value by comparing with the set value by the controller 23, the expansion valves 15-2 and 15-3 and the refrigerant inlet shutoff valve 21-2, which are not in operation, are detected. 21-3) is opened and the evaporators 16-2 and 16-3 are operated to perform a refrigerant recovery operation for a predetermined time, thereby stagnation in the non-operating evaporators 16-2 and 16-3 and the connection lines 14. The evaporators 16-2 and 16-3 and their connecting lines 1 which are not operated by recovering the used liquid refrigerants and then operating only one evaporator 16-1 again. Block the accumulation of large amount of liquid refrigerant in 4).
상기의 예에서는 압축기(11)의 흡입부측의 압력변화에 따라 냉매유입차단밸브(12)를 콘트롤하는 것을 예로들어 설명하였으나, 꼭 그에 한정하는 것은 아니고, 냉매부족으로 인하여 압축기(11)에 변화가 발생될 수 있는 것들, 즉 온도변화와 같은 것을 검출하여 냉매유입차단밸브(12)를 콘트롤하는 것도 가능하다.In the above example, the control of the refrigerant inlet shutoff valve 12 according to the pressure change of the suction side of the compressor 11 has been described as an example, but the present invention is not limited thereto. It is also possible to control the refrigerant inlet shutoff valve 12 by detecting things that may be generated, such as temperature changes.
이상에서 상세히 설명한 바와 같이, 본 발명 멀티에어컨의 액축적방지방법은 다수개의 증발기가 구비되는 멀티에어컨의 운전시 압축기의 압력이 설정치를 벗어나는 경우에 비가동되는 증발기에 연결되어 있는 팽창밸브 및 냉매유입차단밸브를 열고 일정시간동안 비가동되는 증발기를 가동시켜서 증발기와 연결라인에 축적되어 있던 액냉매를 회수하는 냉매회수운전을 실시함으로서, 냉매감소에 의한 압축기의 소손을 방지하는 효과가 있다.As described above in detail, the liquid accumulation prevention method of the multi-air conditioner of the present invention is the expansion valve and the refrigerant inlet connected to the evaporator which is not activated when the pressure of the compressor is out of the set value during operation of the multi-air conditioner equipped with a plurality of evaporators By opening the shut-off valve and operating the evaporator that is not operated for a predetermined time, the refrigerant recovery operation for recovering the liquid refrigerant accumulated in the evaporator and the connection line is performed, thereby preventing the compressor from being burned out by the refrigerant reduction.
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| KR10-1999-0026771A KR100374815B1 (en) | 1999-07-03 | 1999-07-03 | Prevention method of refrigerant accumulation in multi a/c |
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| US7380407B2 (en) | 2004-08-04 | 2008-06-03 | Samsung Electronics Co., Ltd. | Multi air conditioning system and method for operating the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR900008076A (en) * | 1988-11-21 | 1990-06-02 | 나카무라 히사오 | Thermosetting artificial hair and its manufacturing method |
| JPH0460332A (en) * | 1990-06-28 | 1992-02-26 | Toshiba Corp | Air conditioner |
| JPH05240522A (en) * | 1992-02-28 | 1993-09-17 | Sanyo Electric Co Ltd | Air conditioning apparatus |
| KR19990042518A (en) * | 1997-11-27 | 1999-06-15 | 구자홍 | Refrigeration cycle of multi air conditioner |
| KR19990042522A (en) * | 1997-11-27 | 1999-06-15 | 구자홍 | Refrigerant Circulator of Multi Air Conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR900008076A (en) * | 1988-11-21 | 1990-06-02 | 나카무라 히사오 | Thermosetting artificial hair and its manufacturing method |
| JPH0460332A (en) * | 1990-06-28 | 1992-02-26 | Toshiba Corp | Air conditioner |
| JPH05240522A (en) * | 1992-02-28 | 1993-09-17 | Sanyo Electric Co Ltd | Air conditioning apparatus |
| KR19990042518A (en) * | 1997-11-27 | 1999-06-15 | 구자홍 | Refrigeration cycle of multi air conditioner |
| KR19990042522A (en) * | 1997-11-27 | 1999-06-15 | 구자홍 | Refrigerant Circulator of Multi Air Conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7380407B2 (en) | 2004-08-04 | 2008-06-03 | Samsung Electronics Co., Ltd. | Multi air conditioning system and method for operating the same |
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