KR100504902B1 - Air conditioner with out door units and refrigerant control method thereof - Google Patents
Air conditioner with out door units and refrigerant control method thereof Download PDFInfo
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- KR100504902B1 KR100504902B1 KR10-2003-0075248A KR20030075248A KR100504902B1 KR 100504902 B1 KR100504902 B1 KR 100504902B1 KR 20030075248 A KR20030075248 A KR 20030075248A KR 100504902 B1 KR100504902 B1 KR 100504902B1
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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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
- F25B2500/19—Calculation of parameters
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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
- F25B2700/13—Mass flow of refrigerants
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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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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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
- F25B45/00—Arrangements for charging or discharging refrigerant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
본 발명은 복수의 실외기를 구비한 공기조화기 및 그의 냉매제어방법에 관한 것이다. 본 발명에 따른 복수의 실외기를 구비한 공기조화기는, 압축기와, 실외열교환기를 각각 구비한 복수의 실외기와; 상기 각 실외기의 냉방시 냉매의 흐름방향을 따라 냉매의 유출측 및 유입측 유로를 각각 개폐하도록 배치되는 제1밸브 및 제2밸브와; 상기 복수의 실외기중 일부가 운전되는 부분 부하 운전시 비 운전 실외기를 소정 시간 동안 냉방 운전으로 구동되도록 제어함과 동시에 상기 비부하운전 실외기의 유출측 유로가 차단되도록 상기 제1밸브를 제어하는 제어부를 포함하는 것을 특징으로 한다. 이에 의해, 부분 부하 운전시 운전되는 실외기로 과도하게 냉매가 유입되는 것을 억제할 수 있어 성능 및 효율을 향상시킬 수 있으며 내구성이 저하되는 것을 방지할 수 있다. The present invention relates to an air conditioner having a plurality of outdoor units and a refrigerant control method thereof. An air conditioner having a plurality of outdoor units according to the present invention includes: a plurality of outdoor units each having a compressor and an outdoor heat exchanger; First and second valves arranged to open and close the outlet and inlet flow paths of the refrigerant in a cooling direction of each outdoor unit, respectively; A control unit for controlling the first valve to control the non-driving outdoor unit to be driven by a cooling operation for a predetermined time during a partial load operation in which some of the plurality of outdoor units are operated, and to block the outflow side flow path of the non-loading outdoor unit. It is characterized by including. As a result, excessive flow of refrigerant into the outdoor unit operated during partial load operation can be suppressed, thereby improving performance and efficiency, and preventing durability from being lowered.
Description
본 발명은, 복수의 실외기를 구비한 공기조화기 및 그의 냉매제어방법에 관한 것으로서, 보다 상세하게는, 부분 부하 운전시 운전되는 실외기로 냉매가 과도하게 유입되는 것을 억제하여 효율 및 성능을 제고시킬 수 있도록 한 복수의 실외기를 구비한 공기조화기 및 그의 냉매제어방법에 관한 것이다. The present invention relates to an air conditioner having a plurality of outdoor units and a refrigerant control method thereof. More particularly, the present invention relates to a method of improving efficiency and performance by preventing excessive refrigerant from flowing into an outdoor unit operated during partial load operation. An air conditioner having a plurality of outdoor units and a refrigerant control method thereof are provided.
공기조화기는 쾌적한 실내환경을 조성하기 위해 공기의 온도, 습도, 기류 및 청정도를 조절할 수 있도록 한 장치로서, 그 유니트의 구성에 따라 단일의 케이스내에 실내기 및 실외기를 모두 수납되도록 구성되는 일체형 공기조화기와 압축기 및 응축기를 실외기로 하고 증발기를 실내기로 분리되도록 구성한 분리형 공기조화기로 대별된다.The air conditioner is a device that can control the temperature, humidity, air flow, and cleanliness of the air to create a comfortable indoor environment.It is an integrated air conditioner configured to store both indoor and outdoor units in a single case according to the configuration of the unit. It is classified into a separate type air conditioner configured to separate the compressor and the condenser into an outdoor unit and the evaporator into an indoor unit.
공기조화기중 일부는 사방밸브를 구비하여 냉매의 유로를 절환함으로써 냉방 및 난방 기능을 선택적으로 수행할 수 있도록 한 냉난방 겸용 공기조화기가 있다. Some of the air conditioners are provided with a four-way valve to switch the coolant flow path to selectively perform a cooling and heating air conditioner to perform the cooling and heating functions.
최근에는 실내의 각 공간별로 냉방 또는 난방이 가능하도록 복수의 실내기를 구비한 소위 멀티형 공기조화기가 이용되고 있으며, 이러한 멀티형 공기조화기는 실내기의 운전 대수에 따른 냉방 또는 난방 부하에 효과적으로 대응할 수 있게 복수의 압축기를 구비하거나 복수의 실외기를 서로 병렬로 연결하여 사용되고 있다.Recently, a so-called multi-type air conditioner having a plurality of indoor units is used to cool or heat each space in a room, and the multi-type air conditioner has a plurality of air conditioners that can effectively respond to cooling or heating loads according to the number of operation units of the indoor unit. A compressor or a plurality of outdoor units are connected to each other in parallel.
도 1은 종래의 공기조화기의 실외기의 구성을 도시한 도면이다. 도시된 바와 같이, 공기조화기는, 서로 병렬로 연결되는 복수의 실외기(11a,11b) 및 도시 않은 복수의 실내기를 구비하고 있다. 각 실외기(11a,11b)는, 냉매를 압축하는 복수의 압축기(13)와, 냉매가 열교환되는 실외열교환기(21)와, 냉매의 유로를 절환하는 사방밸브(19)와, 각 압축기(13)에 기체상태의 냉매를 제공하는 어큐뮬레이터(17)를 각각 구비하고 있다. 1 is a view showing the configuration of an outdoor unit of a conventional air conditioner. As illustrated, the air conditioner includes a plurality of outdoor units 11a and 11b and a plurality of indoor units not shown, which are connected in parallel with each other. Each of the outdoor units 11a and 11b includes a plurality of compressors 13 for compressing the refrigerant, an outdoor heat exchanger 21 for exchanging the refrigerant, a four-way valve 19 for switching the flow path of the refrigerant, and each compressor 13. ), Accumulators 17 are provided, respectively, to provide a refrigerant in a gaseous state.
각 압축기(13)의 토출측에는 오일을 분리하는 오일분리기(14) 및 역류를 방지하는 체크밸브(15)가 각각 구비되어 있으며, 냉매의 흐름방향을 따라 체크밸브(15)의 하류영역에는 냉매의 유로를 절환할 수 있도록 사방밸브(19)가 설치되어 있다. On the discharge side of each compressor 13, an oil separator 14 for separating oil and a check valve 15 for preventing back flow are respectively provided, and in the downstream region of the check valve 15 along the flow direction of the refrigerant, The four-way valve 19 is provided so that a flow path can be switched.
사방밸브(19)에는 실외열교환기(21)와, 어큐뮬레이터(17) 및 실내기로 연결되는 냉매관(20)의 각 일단이 각각 결합되어 있으며, 냉방시 냉매의 흐름방향을 따라 실외열교환기(21)의 유출측에는 리시버(23) 및 드라이어(25)가 각각 구비되어 있다. 실내기로 연결되는 냉매관(20) 및 드라이어(25)의 일측에는 각 실외기(11a,11b)의 서비스밸브(27)가 각각 구비되어 있으며, 각 실외기(11a,11b)는 메인냉매관(29)에 의해 서로 연통되게 연결되어 있다.The four-way valve 19 is coupled to the outdoor heat exchanger 21 and each end of the refrigerant pipe 20 connected to the accumulator 17 and the indoor unit, respectively, and the outdoor heat exchanger 21 along the flow direction of the refrigerant during cooling. The receiver 23 and the dryer 25 are provided in the outflow side of the (). One side of the refrigerant pipe 20 and the dryer 25 connected to the indoor unit is provided with a service valve 27 of each outdoor unit 11a, 11b, and each outdoor unit 11a, 11b is a main refrigerant pipe 29. Are connected in communication with each other.
그런데, 이러한 종래의 공기조화기에 있어서는, 실내기중 일부가 운전되는 부분 부하 운전시 실외기(11a,11b)중 일부만이 운전되는 경우, 운전되지 아니하는 실외기측 냉매가 부하에 대응되어 운전되는 실외기로 과도하게 유입되어 고압 증가와, 효율 및 성능 저하가 발생될 뿐만 아니라 전반적으로 내구성을 저하시키는 등 악영향을 초래하게 된다고 하는 문제점이 있다.By the way, in such a conventional air conditioner, when only a part of the outdoor units 11a and 11b are operated during partial load operation in which some of the indoor units are operated, the outdoor unit refrigerant that is not driven is transient to the outdoor unit operated in correspondence with the load. In addition, the high pressure, efficiency and performance deterioration are not only generated, but also adversely affect the overall durability.
이러한 문제점을 고려하여, 각 실외기(11a,11b)의 리시버(23) 및 어큐뮬레이터(17)의 용량을 증대시켜 리시버(23) 및 어큐뮬레이터(17)에 유입된 냉매의 일부가 저장되도록 하고 있어 리시버(23) 및/또는 어큐뮬레이터(17)의 크기가 증가하게 된다고 하는 문제점이 있다.In consideration of this problem, the capacity of the receiver 23 and the accumulator 17 of each outdoor unit 11a, 11b is increased so that a part of the refrigerant flowing into the receiver 23 and the accumulator 17 is stored. 23) and / or the size of the accumulator 17 is increased.
따라서, 본 발명의 목적은, 부분 부하 운전시 운전되는 실외기로 과도하게 냉매가 유입되는 것을 억제할 수 있는 복수의 실외기를 구비한 공기조화기 및 그의 냉매제어방법을 제공하는 것이다. Accordingly, it is an object of the present invention to provide an air conditioner having a plurality of outdoor units capable of suppressing excessive refrigerant from flowing into an outdoor unit operated during partial load operation, and a refrigerant control method thereof.
상기 목적은, 본 발명에 따라, 압축기와, 실외열교환기를 각각 구비한 복수의 실외기와; 상기 각 실외기의 냉방시 냉매의 흐름방향을 따라 냉매의 유출측 및 유입측 유로를 각각 개폐하도록 배치되는 제1밸브 및 제2밸브와; 상기 복수의 실외기중 일부가 운전되는 부분 부하 운전시 비 운전 실외기를 소정 시간 동안 냉방 운전으로 구동되도록 제어함과 동시에 상기 비부하운전 실외기의 유출측 유로가 차단되도록 상기 제1밸브를 제어하는 제어부를 포함하는 것을 특징으로 하는 복수의 실외기를 구비한 공기조화기에 의해 달성된다.According to the present invention, there is provided a plurality of outdoor units each including a compressor and an outdoor heat exchanger; First and second valves arranged to open and close the outlet and inlet flow paths of the refrigerant in a cooling direction of each outdoor unit, respectively; A control unit for controlling the first valve to control the non-driving outdoor unit to be driven by a cooling operation for a predetermined time during a partial load operation in which some of the plurality of outdoor units are operated, and to block the outflow side flow path of the non-loading outdoor unit. It is achieved by an air conditioner having a plurality of outdoor units comprising a.
여기서, 상기 부분 부하 운전시 부분 부하에 대응되게 운전되는 부하운전실외기의 고압측 및 저압측 압력을 각각 검출하는 고압측 압력센서 및 저압측 압력센서를 더 포함하며, 상기 제어부는 상기 부분 부하 운전시 상기 부하운전실외기의 고압측 압력센서 및 저압측 압력센서의 검출결과에 기초하여 상기 비부하운전 실외기의 유입측 유로가 차단되도록 상기 제2밸브를 제어하는 것이 바람직하다.The apparatus may further include a high pressure side pressure sensor and a low pressure side pressure sensor for detecting a high pressure side and a low pressure side pressure of a load operation outdoor unit which is operated corresponding to the partial load during the partial load operation. It is preferable to control the second valve so that the inflow side flow path of the non-load operation outdoor unit is blocked based on the detection results of the high pressure side pressure sensor and the low pressure side pressure sensor of the load operation outdoor unit.
상기 제어부는 상기 부하운전실외기의 운전 종료후, 상기 비부하운전 실외기의 유출측 및 유입측 및 유로가 개방되도록 상기 제1밸브 및 제2밸브를 제어하는 것이 효과적이다.The control unit is effective to control the first valve and the second valve so that the outflow side, the inflow side, and the flow path of the non-load driving outdoor unit are opened after the operation of the load driving outdoor unit is finished.
상기 각 실외기의 압축기의 토출측에는 유로를 절환할 수 있도록 설치되는 사방밸브를 더 포함하는 것이 바람직하다.Preferably, the discharge side of the compressor of each outdoor unit further includes a four-way valve installed to switch the flow path.
한편, 본 발명의 다른 분야에 따르면, 압축기와, 실외열교환기를 각각 구비한 복수의 실외기를 구비한 공기조화기의 냉매제어방법에 있어서, 상기 복수의 실외기중 일부가 운전되는 부분 부하운전시, 비부하운전 실외기의 압축기에서 토출된 냉매가 상기 실외열교환기로 유동되도록 함과 아울러 상기 실외열교환기를 경유한 냉매가 유출되지 않도록 상기 비부하운전 실외기의 유출측 유로를 차단하여 소정 시간 동안 상기 비부하운전 실외기를 구동하는 단계와; 상기 부분 부하운전시 운전되는 부하운전실외기의 고압측 및 저압측 압력을 검출하는 단계와; 상기 압력 검출 결과에 기초하여 상기 비부하운전 실외기의 유출측 유로를 차단하는 단계를 포함하는 것을 특징으로 하는 복수의 실외기를 구비한 공기조화기의 냉매제어방법이 제공된다. Meanwhile, according to another field of the present invention, in the refrigerant control method of an air conditioner having a compressor and a plurality of outdoor units each having an outdoor heat exchanger, a partial load operation in which some of the plurality of outdoor units are operated, The non-loading outdoor unit is blocked for a predetermined time by blocking the flow path of the non-loading outdoor unit so that the refrigerant discharged from the compressor of the load driving outdoor unit flows to the outdoor heat exchanger and does not flow out of the refrigerant passing through the outdoor heat exchanger. Driving; Detecting a high pressure side and a low pressure side pressure of a load driving outdoor unit which is operated during the partial load operation; A refrigerant control method of an air conditioner having a plurality of outdoor units is provided, the method comprising: blocking an outlet side flow path of the non-loading outdoor unit based on a result of the pressure detection.
여기서, 상기 부분 부하 운전시, 상기 부하운전실외기의 운전 종료 후, 상기 비부하운전 실외기의 유출측 및 유입측 유로를 개방하는 단계를 더 포함하는 것이 바람직하다.Here, during the partial load operation, after the operation of the load operation outdoor unit is finished, it is preferable to further include the step of opening the outflow side and inflow side flow path of the non-load operation outdoor unit.
이하, 첨부된 도면을 참조하여 본 발명에 대해 상세히 설명한다. Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.
도 2는 본 발명의 일 실시예에 따른 복수의 실외기를 구비한 공기조화기의 실외기의 구성을 도시한 도면이고, 도 3은 도 2의 복수의 실외기를 구비한 공기조화기의 제어블록도이며, 도 4는 본 발명의 일 실시예에 따른 복수의 실외기를 구비한 공기조화기의 냉매제어방법을 설명하기 위한 도면이다. 전술 및 도시한 구성과 동일 및 동일 상당부분에 대해서는 도면 설명의 편의상 동일한 참조부호를 부여하고, 일부 구성에 대한 상세한 설명은 생략하기로 한다. 이들 도면에 도시된 바와 같이, 본 복수의 실외기를 구비한 공기조화기는, 압축기(13) 및 실외열교환기(21)를 각각 구비한 복수의 실외기(11a,11b)와, 냉방 운전시 냉매의 흐름방향을 따라 각 실외기(11a,11b)의 유출측 및 유입측 냉매 유로를 개폐할 수 있도록 배치되는 제1개폐밸브(45) 및 제2개폐밸브(47)와, 일부의 실외기(11a,11b)만 운전되는 부분 부하 운전시, 운전되지 아니하는 비부하운전 실외기(11a,11b)의 냉매 유출이 차단되도록 제1개폐밸브(45)를 제어함과 아울러 비부하운전 실외기(11a,11b)를 소정 시간 동안 구동되도록 제어하는 제어부(51)를 포함하여 구성되어 있다.2 is a view showing the configuration of an outdoor unit of an air conditioner having a plurality of outdoor units according to an embodiment of the present invention, Figure 3 is a control block diagram of an air conditioner having a plurality of outdoor units of FIG. 4 is a view for explaining a refrigerant control method of an air conditioner having a plurality of outdoor units according to an embodiment of the present invention. The same reference numerals and the same components as the above-described and illustrated components will be denoted by the same reference numerals for convenience of description, and detailed descriptions of some components will be omitted. As shown in these figures, the air conditioner including the plurality of outdoor units includes a plurality of outdoor units 11a and 11b each having a compressor 13 and an outdoor heat exchanger 21, and a refrigerant flow during cooling operation. The first opening / closing valve 45 and the second opening / closing valve 47 arranged to open and close the outlet and inflow refrigerant passages of the outdoor units 11a and 11b along the direction, and some of the outdoor units 11a and 11b. During the partial load operation, in which the full load operation is performed, the first opening / closing valve 45 is controlled to block the refrigerant leakage of the non-load operation outdoor units 11a and 11b which are not operated, and the non-load operation outdoor units 11a and 11b are predetermined. It is configured to include a control unit 51 for controlling to be driven for a time.
각 실외기(11a,11b)는, 복수의 압축기(13)와, 실외열교환기(21)와, 각 압축기(13)의 토출측에 배치되어 냉매의 유로를 절환하는 사방밸브(19)와, 각 압축기(13)에 기체상태의 냉매를 제공하는 어큐뮬레이터(17)를 구비하고 있다. 각 압축기(13)의 토출측 및 유입측에는 고압 및 저압을 각각 검출할 수 있도록 고압측 압력센서(41) 및 저압측 압력센서(43)가 각각 구비되어 있다. Each of the outdoor units 11a and 11b includes a plurality of compressors 13, an outdoor heat exchanger 21, a four-way valve 19 disposed on the discharge side of each compressor 13 to switch the refrigerant flow path, and each compressor. The accumulator 17 which provides the refrigerant | coolant of a gaseous state to 13 is provided. The high pressure side pressure sensor 41 and the low pressure side pressure sensor 43 are respectively provided on the discharge side and the inflow side of each compressor 13 so as to detect the high pressure and the low pressure, respectively.
냉방시 냉매의 흐름방향을 따라 실외열교환기(21)의 유출측 냉매관에는 리시버(23) 및 드라이어(25)가 각각 구비되어 있으며, 드라이어(25)의 일측 및 사방밸브(19)에 일측이 연결된 냉매관(20)에는 서비스밸브(27)가 각각 구비되어 있다.A receiver 23 and a dryer 25 are respectively provided at the outlet side refrigerant pipe of the outdoor heat exchanger 21 along the flow direction of the refrigerant during cooling, and one side of the dryer 25 and one side of the four-way valve 19 are provided. Each of the connected refrigerant pipes 20 is provided with a service valve 27.
냉방시 냉매의 흐름방향을 따라 각 서비스밸브의 상류 및 하류영역에는 각 실외기(11a,11b)의 냉방 운전시 냉매의 유출 및 유입을 차단할 수 있도록 제1개폐밸브(45) 및 제2개폐밸브(47)가 각각 구비되어 있다. The first opening and closing valves 45 and the second opening and closing valves may be disposed in the upstream and downstream regions of each service valve along the flow direction of the refrigerant during cooling to block the outflow and inflow of the refrigerant during the cooling operation of the outdoor units 11a and 11b. 47 are provided respectively.
한편, 제어프로그램이 내장된 마이컴 등의 형태로 구현되는 제어부(51)에는 부분 부하 운전시, 비부하운전 실외기(11a,11b)의 냉매를 제어하고, 부하운전 실외기(11a,11b)의 고압 및 저압을 각각 검출하고 그 검출결과에 기초하여 냉매의 유량을 제어할 수 있도록 고압측 압력센서(41) 및 저압측 압력센서(43)와, 각 실외기(11a,11b)의 각 압축기(13)가 전기적으로 연결되어 있다. On the other hand, the control unit 51, which is implemented in the form of a microcomputer with a built-in control program, controls the refrigerant of the unloaded outdoor units 11a and 11b during the partial load operation, and controls the high pressure and the high pressure of the load operated outdoor units 11a and 11b. The high pressure side pressure sensor 41 and the low pressure side pressure sensor 43, and the compressors 13 of the outdoor units 11a and 11b, respectively, detect the low pressure and control the flow rate of the refrigerant based on the detection result. It is electrically connected.
이러한 장치적 특성을 가지는 본 복수의 실외기를 구비한 공기조화기의 냉매제어방법을 도 4를 참조하여 설명하면 다음과 같다.The refrigerant control method of the air conditioner including the plurality of outdoor units having such a device characteristic will be described with reference to FIG. 4 as follows.
제어부(51)는 복수의 실외기(11a,11b)중 운전되지 아니하는 비부하운전 실외기(11a,11b)가 있는 지 여부를 판단하고(S10), 비부하운전 실외기(11a,11b)를 냉방운전시킴과 아울러 비부하운전 실외기(11a,11b)로부터 냉매가 유출되지 아니하도록 제1개폐밸브(45)를 제어하여 유출측 유로가 차단되게 한다(S20). 이에 따라, 비부하운전 실외기(11a,11b)에는 실내기와 연결되는 냉매관(20)을 통해 냉매가 유입되고, 유입된 냉매는 사방밸브(19) 및 어큐뮬레이터(17)를 경유하여 각 압축기(13)로 흡입된다. 각 압축기(13)에서 압축된 냉매는 사방밸브(19)를 경유하여 실외열교환기(21)의 내부에 압축 저장된다. The controller 51 determines whether there are any unloaded outdoor units 11a and 11b that are not operated among the plurality of outdoor units 11a and 11b (S10), and cools the non-loaded outdoor units 11a and 11b. In addition, the first opening / closing valve 45 is controlled to prevent the refrigerant from flowing out of the non-load driving outdoor units 11a and 11b so that the outflow side flow path is blocked (S20). Accordingly, the refrigerant is introduced into the non-loading outdoor units 11a and 11b through the refrigerant pipe 20 connected to the indoor unit, and the introduced refrigerant passes through the four-way valve 19 and the accumulator 17 to each compressor 13. Inhaled). The refrigerant compressed in each compressor 13 is compressed and stored inside the outdoor heat exchanger 21 via the four-way valve 19.
제어부(51)는 부하에 대응하여 운전되는 부하운전 실외기(11a,11b)의 고압측 압력센서(41) 및 저압측 압력센서(43)를 제어하여 고압 및 저압이 각각 검출되도록 하고(S30), 검출된 고압 및 저압이 적절한가를 판단한다(S40). 적절하다고 판단되면 비부하운전 실외기(11a,11b)의 제2개폐밸브(47)를 차단하고 비부하운전 실외기(11a,11b)의 각 압축기(13)의 구동을 중지시킨다(S50). The control unit 51 controls the high pressure side pressure sensor 41 and the low pressure side pressure sensor 43 of the load driving outdoor units 11a and 11b operated in response to the load so that the high pressure and the low pressure are respectively detected (S30), It is determined whether the detected high pressure and low pressure are appropriate (S40). If it is determined that appropriate, the second opening and closing valve 47 of the non-load operation outdoor unit (11a, 11b) is cut off and the driving of each compressor 13 of the non-load operation outdoor unit (11a, 11b) is stopped (S50).
한편, 소정 시간이 경과되어 부하운전 실외기(11a,11b)의 운전이 종료되면(S60), 제어부(51)는 비부하운전 실외기(11a,11b)의 제1개폐밸브(45) 및 제2개폐밸브(47)를 제어하여 유출측 및 유입측 유로가 각각 개방되도록 한다(S70).On the other hand, when a predetermined time has elapsed and the operation of the load driving outdoor units 11a and 11b ends (S60), the control unit 51 opens and closes the first opening / closing valve 45 and the second opening / closing of the unloading outdoor units 11a and 11b. The valve 47 is controlled to allow the outlet side and the inflow side passages to be opened, respectively (S70).
이상 설명한 바와 같이, 본 발명에 따르면, 압축기 및 실외열교환기를 각각 구비한 복수의 실외기와, 각 실외기의 냉방운전시 냉매의 흐름방향을 따라 유출측 및 유입측에 각각 유로를 개폐할 수 있도록 배치되는 제1밸브 및 제2밸브와, 일부 실외기가 운전되는 부분 부하 운전시, 운전되지 아니하는 비부하운전 실외기를 냉방운전모드로 운전시킴과 아울러 유출측 유로가 차단되게 제1개폐밸브를 제어하는 제어부를 마련하고 부분 부하 운전시 비부하운전 실외기에 냉매가 압축 저장되도록 함으로써 부하운전 실외기에 냉매가 과도하게 유입되는 것을 억제할 수 있어 냉/난방 성능 및 압축 효율을 향상시킬 수 있고 기기의 내구성이 저하되는 것을 방지할 수 있는 복수의 실외기 및 그의 냉매제어방법이 제공된다.As described above, according to the present invention, a plurality of outdoor units each having a compressor and an outdoor heat exchanger are arranged to open and close the flow paths on the outlet side and the inlet side along the flow direction of the refrigerant during the cooling operation of each outdoor unit. Control unit for controlling the first opening / closing valve to operate the first valve and the second valve and the non-load driving outdoor unit which is not operated during the partial load operation in which some outdoor units are operated in the cooling operation mode and to block the outflow side flow path. And by compressing and storing the refrigerant in the non-load operation outdoor unit during partial load operation, it is possible to suppress excessive flow of refrigerant into the load operation outdoor unit, thereby improving cooling / heating performance and compression efficiency, and reducing the durability of the device. A plurality of outdoor units and a refrigerant control method thereof are provided that can be prevented.
또한, 본 발명에 따르면, 리시버 및 어큐뮬레이터의 크기를 줄일 수 있어 콤팩트한 구성이 가능하다. In addition, according to the present invention, the size of the receiver and the accumulator can be reduced, allowing a compact configuration.
도 1은 종래의 공기조화기의 실외기의 구성을 도시한 도면,1 is a view showing the configuration of an outdoor unit of a conventional air conditioner,
도 2는 본 발명의 일 실시예에 따른 복수의 실외기를 구비한 공기조화기의 실외기의 구성을 도시한 도면, 2 is a view showing the configuration of an outdoor unit of an air conditioner having a plurality of outdoor units according to an embodiment of the present invention;
도 3은 도 2의 복수의 실외기를 구비한 공기조화기의 제어블록도, 3 is a control block diagram of an air conditioner having a plurality of outdoor units of FIG. 2;
도 4는 본 발명의 일 실시예에 따른 복수의 실외기를 구비한 공기조화기의 냉매제어방법을 설명하기 위한 도면이다. 4 is a view for explaining a refrigerant control method of an air conditioner having a plurality of outdoor units according to an embodiment of the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
11a,11b : 실외기 13 : 압축기11a, 11b: outdoor unit 13: compressor
19 : 사방밸브 21 : 실외열교환기19: four-way valve 21: outdoor heat exchanger
41 : 고압측 압력센서 43 : 저압측 압력센서41: high pressure side pressure sensor 43: low pressure side pressure sensor
45 : 제1개폐밸브 47 : 제2개폐밸브45: the first open and close valve 47: the second open and close valve
51 : 제어부51: control unit
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| KR10-2003-0075248A KR100504902B1 (en) | 2003-10-27 | 2003-10-27 | Air conditioner with out door units and refrigerant control method thereof |
| EP04024799A EP1528332B1 (en) | 2003-10-27 | 2004-10-19 | air conditioner having multiple outdoor units and control method thereof |
| US10/967,157 US20050086954A1 (en) | 2003-10-27 | 2004-10-19 | Air conditioner having multiple outdoor units, and control method thereof |
| DE602004013409T DE602004013409T2 (en) | 2003-10-27 | 2004-10-19 | Multi-unit air conditioning system and control method therefor |
| CNB2004101033757A CN1329697C (en) | 2003-10-27 | 2004-10-27 | Air conditioner having multiple outdoor units, and control method thereof |
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| KR20060062769A (en) * | 2004-12-06 | 2006-06-12 | 엘지전자 주식회사 | Multi airconditioning system and method for controlling the system |
| KR100700545B1 (en) * | 2005-08-10 | 2007-03-28 | 엘지전자 주식회사 | Apparatus for controlling the driving of an air conditioner having plural compressors and method therefor |
| KR100680618B1 (en) * | 2005-09-27 | 2007-02-08 | 삼성전자주식회사 | Airconditioner and its starting method |
| JP4285583B2 (en) * | 2007-05-30 | 2009-06-24 | ダイキン工業株式会社 | Air conditioner |
| US9625184B2 (en) * | 2013-01-31 | 2017-04-18 | Trane International Inc. | Multi-split HVAC system |
| WO2016045219A1 (en) * | 2014-09-26 | 2016-03-31 | 珠海格力电器股份有限公司 | Variable refrigerant volume system and control method thereof |
| JP6293647B2 (en) * | 2014-11-21 | 2018-03-14 | ヤンマー株式会社 | heat pump |
| KR101694603B1 (en) | 2015-01-12 | 2017-01-09 | 엘지전자 주식회사 | Air conditioner |
| KR101645845B1 (en) | 2015-01-12 | 2016-08-04 | 엘지전자 주식회사 | Air conditioner |
| KR101639516B1 (en) * | 2015-01-12 | 2016-07-13 | 엘지전자 주식회사 | Air conditioner |
| CN104612935B (en) * | 2015-01-16 | 2017-03-08 | 王仪靖 | One kind helps the high-lift efficient liquid pumping installations of floating hoisting type Large Copacity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW212224B (en) * | 1992-02-28 | 1993-09-01 | Sanyo Denki Kk | |
| JPH07234038A (en) * | 1994-02-18 | 1995-09-05 | Sanyo Electric Co Ltd | Multiroom type cooling-heating equipment and operating method thereof |
| US5673570A (en) * | 1994-06-29 | 1997-10-07 | Daikin Industries, Ltd. | Oil equalizing operation control device for air conditioner |
| US5685168A (en) * | 1994-06-29 | 1997-11-11 | Daikin Industries, Ltd. | Refrigerating apparatus |
| JPH11125476A (en) * | 1997-10-22 | 1999-05-11 | Mitsubishi Heavy Ind Ltd | Multi-room air conditioner having a plurality of outdoor units and operating method therefor |
| KR100364534B1 (en) * | 1999-10-27 | 2002-12-16 | 엘지전자 주식회사 | Multi air conditioner |
| JP2002181370A (en) * | 2001-12-03 | 2002-06-26 | Sanyo Electric Co Ltd | Air-conditioner |
| KR100474326B1 (en) * | 2002-02-25 | 2005-03-08 | 엘지전자 주식회사 | Multiple airconditioner |
| KR100437805B1 (en) * | 2002-06-12 | 2004-06-30 | 엘지전자 주식회사 | Multi-type air conditioner for cooling/heating the same time and method for controlling the same |
| KR100504498B1 (en) * | 2003-01-13 | 2005-08-03 | 엘지전자 주식회사 | Air conditioner |
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2003
- 2003-10-27 KR KR10-2003-0075248A patent/KR100504902B1/en active IP Right Grant
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2004
- 2004-10-19 EP EP04024799A patent/EP1528332B1/en not_active Expired - Fee Related
- 2004-10-19 DE DE602004013409T patent/DE602004013409T2/en active Active
- 2004-10-19 US US10/967,157 patent/US20050086954A1/en not_active Abandoned
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|---|---|
| EP1528332B1 (en) | 2008-04-30 |
| US20050086954A1 (en) | 2005-04-28 |
| CN1641277A (en) | 2005-07-20 |
| DE602004013409D1 (en) | 2008-06-12 |
| DE602004013409T2 (en) | 2008-07-31 |
| EP1528332A1 (en) | 2005-05-04 |
| CN1329697C (en) | 2007-08-01 |
| KR20050040081A (en) | 2005-05-03 |
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