KR940008434B1 - Apparatus for controlling refrigerant in invertor air conditioner - Google Patents
Apparatus for controlling refrigerant in invertor air conditioner Download PDFInfo
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- KR940008434B1 KR940008434B1 KR1019910020613A KR910020613A KR940008434B1 KR 940008434 B1 KR940008434 B1 KR 940008434B1 KR 1019910020613 A KR1019910020613 A KR 1019910020613A KR 910020613 A KR910020613 A KR 910020613A KR 940008434 B1 KR940008434 B1 KR 940008434B1
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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
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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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
- F25B2600/2515—Flow valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
제1도는 종래의 인버터 에어콘의 냉매 흐름도.1 is a flow chart of a refrigerant of a conventional inverter air conditioner.
제2도는 본 발명의 인버터 에어콘의 냉매 흐름도2 is a flow chart of the refrigerant of the inverter air conditioner of the present invention
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 압축기 2 : 실외교환기1: Compressor 2: Outdoor Exchange
3, 3a : 모세관 4 : 실내열교환기3, 3a: capillary 4: indoor heat exchanger
5 : 수액기 6 : 리시버5: receiver 6: receiver
7 : 제어수단 8 : 역지밸브7: control means 8: check valve
9 : 인버터제어부 S1, S2, S3: 제1, 제2, 제3온/오프밸브9: Inverter control part S 1 , S 2 , S 3 : 1st, 2nd, 3rd ON / OFF valve
T1, T2: 온도센서 P2: 입력센서T 1 , T 2 : Temperature sensor P 2 : Input sensor
본 발명은 실내의 온도에 적합하도록 압축기 운전주파수를 가변하여 운전할 경우, 냉매싸이클을 순환하는 냉매를 가변된 압축기 운전주파수에 적합한 량으로 조절함으로써 항상 최적의 냉매싸이클을 형성할 수 있는 인버터 에어콘의 순환냉매량 제어장치에 관한 것이다.According to the present invention, when the compressor operation frequency is changed to suit the indoor temperature, the refrigerant circulating the refrigerant cycle is adjusted to an amount suitable for the variable compressor operation frequency so as to always form an optimal refrigerant cycle. A refrigerant amount control apparatus.
종래의 인버터 에어콘은 제1도에 도시한 바와 같이 압축기(1), 실외열교환기(2), 모세관(3), 실내열교환기(4), 수액기(5), 압축기(1)순으로 순차적으로 냉매싸이클이 형성되어, 압축기(1)에 의해 고온고압으로 압축된 기체냉매가 실외열교환기(2)를 거치면서 구동모터(2b)에 연통되어 구동되는 실외팬(2a)에 의해 송풍되는 공기와의 열교환에 의해 응축됨으로써 액체로 되고, 모세관(3)을 거치면서 저온저압의 냉매로 된다.The conventional inverter air conditioner is sequentially shown in the order of the compressor 1, the outdoor heat exchanger 2, the capillary tube 3, the indoor heat exchanger 4, the receiver 5, and the compressor 1, as shown in FIG. Air is blown by the outdoor fan (2a) is driven in communication with the drive motor (2b) while passing through the outdoor heat exchanger (2) the gas refrigerant compressed to high temperature and high pressure by the compressor (1) It becomes a liquid by condensation by heat exchange with and becomes a refrigerant of low temperature and low pressure while passing through the capillary tube 3.
이후, 상기 모세관(3)에 의해 저온저압으로 변환된 냉매가 실내열교환기(4)에 유입되면 실내팬구동용 팬모터(4b)의 구동에 따라 실내팬(4a)에 의해 실내로 배기됨으로써 실내의 더운 공기와 열교환되어 실내를 냉방시킨 후 기체 상태의 냉매로 변환되어 수액기(5)를 거쳐서 압축기(1)로 재유입되어 상술한 바와 같은 동작을 반복해서 냉매싸이클을 형성한다.Thereafter, when the refrigerant converted to low temperature and low pressure by the capillary tube 3 flows into the indoor heat exchanger 4, the refrigerant is discharged into the room by the indoor fan 4a according to the operation of the indoor fan driving fan motor 4b. After heat-exchanging with hot air to cool the room, it is converted into a gaseous refrigerant and re-introduced into the compressor (1) through the receiver (5) to repeat the operation as described above to form a refrigerant cycle.
상기와 같은 냉매싸이클의 동작은 압축기(1)에 연결되어 있는 제어수단(1a)에 의해 제어되는데, 이 제어수단(1a)은 실외온도센서(TH1) 및 실내온도센서(TH2)에 의해 검출된 실내외의 온도변화에 따라 압축기(1)의 운전주파수를 변화시켜 동작시킴으로써 단시간내에 미리 설정된 실내온도에 도달할 수 있도록 하는 것이다.The operation of the refrigerant cycle as described above is controlled by the control means (1a) connected to the compressor (1), which is detected by the outdoor temperature sensor (TH1) and the indoor temperature sensor (TH2) By operating by changing the operating frequency of the compressor (1) in accordance with the change in the temperature of the indoor and outdoor to be able to reach the preset indoor temperature in a short time.
그런데, 상기와 같이 단순히 실내외 온도에 따라 압축기 운전주파수만 적절하게 가변시키면서 실내를 냉방시키는 종래의 경우에는 여러가지 문제점이 있었다.However, there have been various problems in the conventional case of cooling the room simply by varying only the compressor operating frequency according to the indoor and outdoor temperature as described above.
즉, 일반적으로 실내외 온도가 통상적인 범위를 벗어나서 매우 무더운 경우(과부하 조건)에는 압축기의 운전주파수를 최대주파수로 조절한 상태에서 운전하여야 하는데, 이는 에어콘에 미리 봉입된 냉매량이 일정한 량만큼만 봉입되어 있는 것을 감안하면 냉매가 부족되기 때문에 장시간동안 연속적으로 압축기를 구동시킨다는 것은 불가능할 뿐만 아니라, 압축기를 최대주파수로 장시간 운전시키면 토출온도가 과열되므로 압축기에 무리가 가게 되고, 최대주파수로 운전한다 하더라도 그 능력에는 한계가 있다는 문제점이 있었다.That is, in general, when the indoor and outdoor temperature is very hot outside the normal range (overload condition), the operation frequency of the compressor should be adjusted to the maximum frequency, which means that the amount of refrigerant pre-sealed in the air conditioner is filled with a certain amount. In view of this, it is impossible to continuously operate the compressor for a long time because the refrigerant is insufficient, and if the compressor is operated for a long time at the maximum frequency, the discharge temperature is overheated. There was a problem that there was a limit.
또한, 주위의 온도가 상대적으로 낮다거나 설정온도와 주위온도와의 차이가 적어서 상대적으로 압축기를 저주파수로 운전시켜야 할 경우에는, 봉입된 냉매량에 비해서 배관내를 순환하는 냉매량이 적어지므로 증발되지 않은 액체상태의 냉매가 수액기(5)에 축적되고, 만일 상기 수액기(5)의 용량이 적어서 액체냉매 축적량이 포화상태가 되면 액체상태의 냉매가 압축기(1)로 유입된 상태에서 운전하게 되므로 냉매효율을 저하시킬 수 밖에 없다는 문제점도 있었다.In addition, when the compressor is operated at a low frequency because the ambient temperature is relatively low or the difference between the set temperature and the ambient temperature is small, the amount of refrigerant that circulates in the pipe becomes smaller than that of the sealed refrigerant. The refrigerant in the state is accumulated in the receiver 5, and if the capacity of the receiver 5 is small and the liquid refrigerant accumulation amount is saturated, the refrigerant in the liquid state is operated in the state in which the compressor 1 flows into the refrigerant. There was also a problem that the efficiency must be reduced.
뿐만 아니라, 실내기와 실외기를 연결하는 연결배관의 길이에 따라 필요한 냉매를 추가로 투입해야 하는 등의 여러가지 문제점이 있었다.In addition, there were various problems such as the need to add additional refrigerant according to the length of the connection pipe connecting the indoor unit and the outdoor unit.
따라서, 본 발명은 상기와 같은 종래의 여러가지 문제점을 감안하여 이루어진 것으로써, 본 발명의 목적은 실내외 온도의 변화에 따라 압축기 운전주파수를 가변시키면서 냉방기능을 수행해서 압축기의 장수명화를 도모함과 동시에 상기 가변되는 압축기 운전주파수에 적합하도록 순환냉매량을 제어하여 최적의 냉방효과를 발휘할 수 있는 인버터 에어콘의 순환냉매량 제어장치를 제공하는데 있다.Therefore, the present invention has been made in view of the above-described various problems, and an object of the present invention is to achieve a longer life of the compressor by performing a cooling function while varying the compressor operating frequency according to the change of the indoor and outdoor temperature. SUMMARY OF THE INVENTION It is to provide a circulating coolant control device of an inverter air conditioner that can control an circulating coolant to be adapted to a variable compressor operating frequency to achieve an optimal cooling effect.
이와 같은 목적을 달성하기 위하여 본 발명에 의한 인버터 에어콘의 순환냉매량 제어장치는, 압축기, 실외열교환기, 모세관, 실내열교환기, 압축기순으로 냉매싸이클이 형성되어 일정한 공간에 대한 냉방기능을 수행하는 인버터 에어콘에 있어서, 제어수단과, 상기 압축기의 입출구쪽 온도를 감지하는 제1 및 제2온도센서와, 상기 압축기로 유입되는 냉매의 압력을 감지하는 압력센서와, 상기 냉매싸이클을 따라 순환하는 순환냉매량을 제어하는 제1, 제2 및 제3온/오프밸브와, 상기 냉매싸이클을 따라 순화하는 냉매량의 일부 또는 전부를 일시적으로 저장하는 리시버와, 상기 리시버에 유입된 냉매가 역으로 흐르지 않도록 제어하는 역지밸브와, 상기 리시버로부터 방출되는 냉매를 저온저압으로 변환하도록 제1모세관에 대해 병렬로 접속되어 있는 제2모세관을 구비한 것을 특징으로 한다.In order to achieve the above object, the circulating coolant amount control device of the inverter air conditioner according to the present invention includes a refrigerant cycle in the order of a compressor, an outdoor heat exchanger, a capillary tube, an indoor heat exchanger, and a compressor to perform a cooling function for a predetermined space. An air conditioner comprising: control means, first and second temperature sensors for sensing the temperature at the inlet and outlet of the compressor, a pressure sensor for sensing the pressure of the refrigerant flowing into the compressor, and a circulating refrigerant circulating along the refrigerant cycle The first, second and third on / off valves for controlling the, a receiver for temporarily storing a part or all of the amount of the refrigerant to be purified along the refrigerant cycle, and the control to prevent the refrigerant flowing into the receiver from flowing backward A check valve and a second connected in parallel to the first capillary to convert the refrigerant discharged from the receiver into a low temperature low pressure; It characterized in that it includes the customs.
이하, 본 발명의 일실시예를 도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
제2도는 본 발명의 인버터 에어콘의 냉매 흐름도로써 종래와 동일한 부분은 동일부호를 붙이고, 중복되는 설명은 생략한다.2 is a flow chart of the refrigerant of the inverter air conditioner of the present invention, the same parts as in the prior art are denoted by the same reference numerals, and overlapping descriptions are omitted.
제2도에 도시한 바와 같이 압축기(1)의 입구쪽 냉매의 온도 및 압력을 감지하도록 제2온도센서(T2) 및 압력센서(P2)가 수액기(5)의 입구쪽 배관에 배설되어 있고, 압축기(1)의 출구쪽 온도를 감지하도록 제1온도센서(T1)가 압축기(1)의 출구쪽 배관에 배설되어 있다.As shown in FIG. 2, a second temperature sensor T 2 and a pressure sensor P 2 are disposed in the inlet pipe of the receiver 5 so as to sense the temperature and pressure of the inlet refrigerant of the compressor 1. The first temperature sensor T 1 is disposed in the outlet pipe of the compressor 1 so as to sense the outlet temperature of the compressor 1.
또한, 순환되는 냉매량이 조절되도록 통상적인 솔레노이드가 부착된 제1 및 제2온/오프밸브(S1)(S2) 및 냉매가 역방향으로 흐르지 않도록 역지밸브(8)가 실외열교환기(2)의 출구쪽에 배설되어 있고, 제2온/오프밸브(S2)는 실외열교환기(2)와 제1모세관(3) 사이의 배관에 순차적으로 배설되고, 제1온/오프밸브(S1) 및 역지밸브(8)는 실외열교환기(2)와 리시버(6) 사이의 배관에 순차적으로 배설한다.In addition, the first and second on / off valves S 1 and S 2 having conventional solenoids attached to each other so that the amount of refrigerant circulated, and the check valve 8 are connected to the outdoor heat exchanger 2 so that the refrigerant does not flow in the reverse direction. The second on / off valve (S 2 ) is sequentially disposed in the pipe between the outdoor heat exchanger (2) and the first capillary tube (3), and the first on / off valve (S 1 ). And the check valve 8 is sequentially disposed in the pipe between the outdoor heat exchanger 2 and the receiver 6.
또한, 상기 리시버(6)는 상기 역지밸브(8)가 배설된 배관 후단에 배설되어서 냉매싸이클을 순환하는데 필요한 최적냉매량을 제외한 잔량의 액체냉매 또는 에어콘 이상시 봉입냉매전량을 일시적으로 저장하는 것이다. 상기 리시버(6)의 후단에는 상기 제1 및 제2온/오프밸브(S1)(S2)와 동일한 동작을 수행하는 제3온/오프밸브(S3)가 배설되어 있다.In addition, the receiver 6 is disposed at the rear end of the pipe where the check valve 8 is disposed so as to temporarily store the total amount of the refrigerant contained in the remaining liquid refrigerant or the air conditioner except the optimum refrigerant amount required to circulate the refrigerant cycle. At the rear end of the receiver 6, a third on / off valve S 3 which performs the same operation as the first and second on / off valves S 1 and S 2 is disposed.
한편, 상기 제1 및 제2온도센서(T1)(T2) 및 압력센서(P2)는 제어수단(7)에 전기적으로 접속되어 온도감지값 및 압력감지값을 제어수단(7)에 입력하며, 제1, 제2 및 제3온/오프밸브(S1)(S2)(S3)는 제어수단(7)에 접속된 구동회로(도시하지 않음)와 접속되어 상기 제어수단(7)의 제어신호에 의해 일정시간동안 온(냉매통로를 개방시킴) 또는 오프(냉매통로를 폐색시킴) 동작한다.On the other hand, the first and second temperature sensors (T 1 ) (T 2 ) and the pressure sensor (P 2 ) is electrically connected to the control means (7) to the temperature means and the pressure detection value to the control means (7) Input, and the first, second and third on / off valves S 1 , S 2 , and S 3 are connected to a driving circuit (not shown) connected to the control means 7 so that the control means ( The control signal of 7) operates on or off (close the refrigerant passage) for a certain time.
이와 같은 구성에 의하면, 압축기(1), 실외열교환기(2) 제1온/오프밸브(S1), 역지밸브(8), 리시버(6) 제3온/오프밸브(S3), 제2모세관(3a), 실내열교환기(4), 수액기(5), 압축기(1)순으로 순환되는 냉매싸이클(편의상 제2냉매싸이클이라 칭함)과, 압축기(1), 실외열교환기(2), 제2온/오프밸브(S2), 모세관(3), 실내열교환기(4), 수액기(5) 및 압축기(1)순으로 순환되는 또다른 냉매싸이클(편의상 제1냉매싸이클이라 칭함)이 실외온도센서(TH1) 및 실내온도센서(TH2)에 의해 검출된 실내외의 온도에 따라 각각 형성된다.According to this structure, the compressor 1, the outdoor heat exchanger 2, the first on / off valve S 1 , the check valve 8, the receiver 6, the third on / off valve S 3 , 2 refrigerant cycle circulated in the order of the capillary tube 3a, the indoor heat exchanger 4, the receiver 5, and the compressor 1 (for convenience, referred to as the second refrigerant cycle), the compressor 1, and the outdoor heat exchanger 2 ), A second on / off valve (S 2 ), a capillary tube (3), an indoor heat exchanger (4), a receiver (5), and a compressor (1). Are formed in accordance with the outdoor and outdoor temperatures detected by the outdoor temperature sensor TH1 and the indoor temperature sensor TH2, respectively.
즉, 압축기(1)의 입·출구온도 및 압력에 따라 압축기(1)의 운전주파수를 변환시키고 상기 변환된 압축기(1)의 운전주파수에 적합한 량의 냉매만이 냉매싸이클을 순환토록 하는 것이다.That is, the operating frequency of the compressor 1 is converted in accordance with the inlet / outlet temperature and the pressure of the compressor 1, and only the refrigerant of the amount appropriate for the operating frequency of the converted compressor 1 is allowed to circulate the refrigerant cycle.
본 발명의 전체적인 동작을 설명한다.The overall operation of the present invention will be described.
최초동작시에는 제1온/오프밸브(S1) 및 역지밸브(8)는 오프된 상태에서 압축기(1), 실외열교환기(2), 제2온/오프밸브(S2), 모세관(3), 실내열교환기(4), 수액기(5), 압축기(1)순으로 형성되는 제1냉매싸이클을 따라 냉매가 순환되면서 냉방기능을 수행한다.In the initial operation, the compressor 1, the outdoor heat exchanger 2, the second on / off valve S 2 and the capillary tube ( 1 ) with the first on / off valve S 1 and the check valve 8 turned off. 3), the refrigerant is circulated along the first refrigerant cycle formed in the order of the indoor heat exchanger (4), the receiver (5), the compressor (1) to perform the cooling function.
이때, 제어수단(7)은 제1 및 제2온도센서(T1)(T2) 및 압력센서(P2)에 의해 감지되어 입력되는 온도 및 압력에 의해 압축기(1)의 입·출구쪽의 냉매의 온도 및 압력을 판별한다.At this time, the control means 7 is the inlet and outlet sides of the compressor (1) by the temperature and pressure detected and input by the first and second temperature sensors (T 1 ) (T 2 ) and the pressure sensor (P 2 ) Determine the temperature and pressure of the refrigerant.
상기와 같은 판별동작이 수행되는 가운데 압축기(1) 출구쪽의 냉매온도가 상승되면 실외온도가 상승된 상태이므로, 압축기 주파수를 최대로 상승시켜서 운전하여야 한다. 이때 냉매싸이클을 순환하는 순환냉매량도 증가되어야 하므로 제3온/오프밸브(S3)를 온시켜서 리시버(6)에 저장되어 있던 냉매중 일정량을 실내열교환기(4)측으로 서서히 방출한다. 그러면, 그 방출되는 냉매가 제2모세관(3a)에 의해 저온저압으로 되어서 모세관(3)으로부터 배출된 냉매와 합류된 후, 그 합류된 냉매가 실내열교환기(4)에 유입되어 팬모터(4b)의 구동에 따라 회전되는 실내팬(4a)에 의해 실내공기와 열교환됨으로써 실내가 냉방되도록 한다.When the refrigerant temperature at the outlet of the compressor 1 is increased while the determination operation is performed as described above, the outdoor temperature is increased. Therefore, the compressor frequency must be operated to the maximum. At this time, since the amount of circulating refrigerant circulating through the refrigerant cycle should be increased, the third on / off valve S 3 is turned on to gradually discharge a predetermined amount of the refrigerant stored in the receiver 6 to the indoor heat exchanger 4. Then, the discharged refrigerant becomes a low temperature low pressure by the second capillary tube 3a and merges with the refrigerant discharged from the capillary tube 3, and then the joined refrigerant flows into the indoor heat exchanger 4 and the fan motor 4b. By heat exchange with the indoor air by the indoor fan (4a) is rotated in accordance with the driving of the) to allow the room to cool.
이때, 제2온도센서(T2) 및 압력센서(P2)에 의해 감지된 압축기(1) 입구쪽의 냉매의 온도 및 압력을 제어수단(7)이 받아서 판별하여 액체상태의 냉매가 압축기(1)에 유입되지 않는 범위내에서 냉매량이 적절히 조절되도록 제어함으로써 최적의 냉매싸이클이 형성되도록 한다.At this time, the control means 7 receives and determines the temperature and pressure of the refrigerant at the inlet side of the compressor 1 sensed by the second temperature sensor T 2 and the pressure sensor P 2 to determine the liquid refrigerant in the compressor ( The optimum refrigerant cycle is formed by controlling the amount of refrigerant to be adjusted appropriately within the range that does not flow into 1).
한편, 실내외 온도가 낮아서 저온운전을 수행하여야 하는 경우에는, 압축기(1)의 운전주파수를 낮추어서 운전해야 하며, 순환냉매량도 감소시켜야 한다.On the other hand, when the indoor and outdoor temperature is low to perform a low temperature operation, the operation frequency of the compressor (1) should be lowered and operated, and the amount of circulating refrigerant should also be reduced.
따라서, 제어수단(7)은 오프되어 있던 제1온/오프밸브(S1) 및 역지밸브(8)를 개방하여 실외열교환기(2)를 통과한 냉매의 일부(제1냉매싸이클을 따라 순화되어야 할 최적냉매량을 초과하는 량)가 리시버(6)에 유입되도록 한다.Accordingly, the control means 7 opens the first on / off valve S 1 and the check valve 8 which are turned off and purifies the portion of the refrigerant passing through the outdoor heat exchanger 2 (along the first refrigerant cycle). The amount exceeding the optimum refrigerant amount to be introduced into the receiver (6).
이렇게 하면, 상기 리시버(6)에 유입되는 냉매량은 제1온/오프밸브(S1)가 제어수단(7)의 제어신호에 의해 온되는 시간동안 유입되는 량이며, 냉매가 유입되는 리시버(6)쪽의 압력이 배관내의 압력에 비해 높아지면 압력에 의해 역지밸브(8)가 폐쇄되어 냉매통로를 폐쇄시키므로 냉매가 리시버(6)에 유입되지 않도록 한다.In this case, the amount of the refrigerant flowing into the receiver 6 is an amount of the first on / off valve S 1 that flows in for the time that is turned on by the control signal of the control means 7, and the receiver 6 into which the refrigerant flows. When the pressure on the side is higher than the pressure in the pipe, the check valve 8 is closed by the pressure to close the refrigerant passage so that the refrigerant does not flow into the receiver 6.
즉, 상기 제어수단(7)에 의해 압축기(1) 출구쪽의 온도를 판별하고, 이 압축기(1) 출구쪽의 온도가 최적 냉방기능수행을 벗어나지 않는 범위내에서 적정량 이외의 냉매량이 리시버(6)에 유입되도록 적당한 시간(압축기(1) 출구쪽의 온도가 실내외 온도가 낮아지기 이전의 정상온도에 도달할때까지의 시간)동안 제1온/오프밸브(S1)를 온시킴으로써, 순환냉매의 과다로 인하여 미처 증발되지 않는 냉매가 없도록 하면서 저온운전에 필요한 적정량의 냉매가 압축기(1), 실외열교환기(2), 제2온/오프밸브(S2), 모세관(3), 실내열교환기(4), 수액기(5), 압축기(1)순으로 순환토록 함으로써 최적상태로 저온운전이 수행되도록 한다.That is, the control means 7 determines the temperature at the outlet of the compressor 1, and the amount of refrigerant other than the proper amount is within the range in which the temperature at the outlet of the compressor 1 does not deviate from the optimum cooling function. ) By turning on the first on / off valve (S 1 ) for a suitable time (the time until the temperature at the outlet of the compressor (1) reaches the normal temperature before the indoor and outdoor temperatures are lowered). Refrigerant that is not evaporated due to excessive amount of refrigerant is required for low temperature operation of the compressor (1), outdoor heat exchanger (2), second on / off valve (S 2 ), capillary tube (3), indoor heat exchanger (4), the receiver (5), the compressor (1) in order to circulate in order to perform the low temperature operation in the optimum state.
한편, 에어콘에 이상이 발생하였을 경우에는 봉입된 냉매가 전부 리시버(6)에 저장되도록 하며, 이는 냉매가 순환되지 않도록 제2, 제3온/오프밸브(S2)(S3)는 오프시키는 반면에 제1온/오프밸브(S1)는 온시켜서 순환냉매가 전부 리시버(6)에 유입되도록 한다.On the other hand, when an abnormality occurs in the air conditioner to ensure that all the sealed refrigerant is stored in the receiver (6), which is to turn off the second, third on / off valve (S 2 ) (S 3 ) so that the refrigerant is not circulated On the other hand, the first on / off valve S 1 is turned on so that all the circulating refrigerant flows into the receiver 6.
상기 동작은 압력센서(P2)에 의해 감지된 압축기(1) 입구쪽의 압력이 제로가 될때까지(순환냉매 전부가 제1온/오프밸브(S1)를 통해 리시버(6)에 유입될때까지)행해지며, 이후 제1온/오프밸브(S1)를 오프시켜서 리시버(6)에 저장된 냉매가 누설되지 않도록 한다.The operation is carried out until the pressure at the inlet side of the compressor 1 detected by the pressure sensor P 2 becomes zero (when all the circulating refrigerant enters the receiver 6 through the first on / off valve S 1 ). Then, the first on / off valve S 1 is turned off so that the refrigerant stored in the receiver 6 does not leak.
이에 따라, 상기 리시버(6)에 유입된 냉매는 냉매싸이클을 순환하지 못하고 저장되는 것이다.Accordingly, the refrigerant introduced into the receiver 6 is stored without being able to circulate the refrigerant cycle.
이와 같이 본 발명의 인버터 에어콘의 순환냉매량 제어장치에 의하면, 실내외 온도에 따라 가변되는 압축기의 운전주파수에 적합한 최적량의 냉매만 냉매싸이클을 순환시키면서 냉방기능을 수행하므로 압축기의 장수명을 유지함과 동시에, 냉방효율을 향상시킬 뿐만 아니라, 에어콘의 이상시 봉입된 냉매전량을 리시버에 환수한 후 이를 재사용할 수 있도록 함으로써 환경오염을 방지할 뿐만 아니라 경제적인 부담을 절감할 수 있다는 뛰어난 효과가 있는 것이다.As described above, according to the circulating refrigerant amount control device of the inverter air conditioner, only the optimum amount of refrigerant suitable for the operation frequency of the compressor which varies according to the indoor and outdoor temperature performs the cooling function while circulating the refrigerant cycle, thereby maintaining the long life of the compressor, In addition to improving the cooling efficiency, by reclaiming the total amount of refrigerant sealed in the air conditioner to the receiver to be able to reuse it is an excellent effect that can not only prevent environmental pollution, but also reduce the economic burden.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910020613A KR940008434B1 (en) | 1991-11-19 | 1991-11-19 | Apparatus for controlling refrigerant in invertor air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019910020613A KR940008434B1 (en) | 1991-11-19 | 1991-11-19 | Apparatus for controlling refrigerant in invertor air conditioner |
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| Publication Number | Publication Date |
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| KR940008434B1 true KR940008434B1 (en) | 1994-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104896690A (en) * | 2015-06-04 | 2015-09-09 | 广东美的制冷设备有限公司 | Air conditioner, control method, control system and air conditioner system |
| KR20160058454A (en) * | 2014-11-17 | 2016-05-25 | 엘지전자 주식회사 | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20020096420A (en) * | 2001-06-19 | 2002-12-31 | 주식회사 엘지이아이 | Apparatus and method for controlling power in airconditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20160058454A (en) * | 2014-11-17 | 2016-05-25 | 엘지전자 주식회사 | Air conditioner |
| CN104896690A (en) * | 2015-06-04 | 2015-09-09 | 广东美的制冷设备有限公司 | Air conditioner, control method, control system and air conditioner system |
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