KR100444971B1 - Multi-chamber type air conditioner and method for controlling electric expansion valve thereof - Google Patents
Multi-chamber type air conditioner and method for controlling electric expansion valve thereof Download PDFInfo
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- KR100444971B1 KR100444971B1 KR20020046369A KR20020046369A KR100444971B1 KR 100444971 B1 KR100444971 B1 KR 100444971B1 KR 20020046369 A KR20020046369 A KR 20020046369A KR 20020046369 A KR20020046369 A KR 20020046369A KR 100444971 B1 KR100444971 B1 KR 100444971B1
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003507 refrigerant Substances 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000002826 coolant Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2104—Temperatures of an indoor room or compartment
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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
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
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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
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
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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 발명은 다실형 공기조화기 및 그 제어방법에 관한 것으로, 특히 다실형 공기조화기의 난방운전시 실외 공기온도와 실외 열교환기의 입구온도사이의 온도차에 기초하여 냉매 사이클이 최적이 되도록 정지 중인 실내기의 전동팽창밸브의 개도를 제어함으로서 정지 중인 실내기의 전동팽창밸브에서의 오일 점도에 의한 냉매 정체 현상을 방지하여 냉매 사이클의 효율을 향상시킨다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-chamber air conditioner and a method of controlling the same, and in particular, a refrigerant cycle is stopped based on a temperature difference between an outdoor air temperature and an inlet temperature of an outdoor heat exchanger during heating operation of the multichamber air conditioner. By controlling the opening degree of the electric expansion valve of the indoor unit, the refrigerant retention phenomenon due to the oil viscosity in the electric expansion valve of the indoor unit being stopped is prevented, thereby improving the efficiency of the refrigerant cycle.
Description
본 발명은 다실형 공기조화기 및 그 제어방법에 관한 것으로, 특히 정지 중인 실내기의 냉매를 제어하여 압축기 및 냉매 사이클을 최적 상태로 하기 위한 다실형 공기조화기 및 그 전동팽창밸브의 제어방법에 관한 것이다.The present invention relates to a multi-room air conditioner and a control method thereof, and more particularly, to a control method of a multi-room air conditioner and an electric expansion valve for controlling a refrigerant of a stationary indoor unit to optimize a compressor and a refrigerant cycle. will be.
일반적으로, 다실형 공기조화기는 하나의 실외기와 다수의 실내기를 포함한다. 실외기에는 압축기, 사방향 밸브, 실외 열교환기, 그리고 전동팽창밸브가 구비되어 있으며, 각 실내기에는 실내 열교환기가 마련되어 있다. 이러한 압축기, 사방향 밸브, 실외 열교환기, 전동팽창밸브 및 각각의 실내 열교환기는 냉매사이클을 형성하도록 연결되어 있다. 전동팽창밸브는 실외 열교환기와 각 실내 열교환기 사이의 냉매관에 마련되어 있다.In general, a multi-chamber air conditioner includes one outdoor unit and a plurality of indoor units. The outdoor unit is equipped with a compressor, a four-way valve, an outdoor heat exchanger, and an electric expansion valve, and each indoor unit is provided with an indoor heat exchanger. These compressors, four-way valves, outdoor heat exchangers, electric expansion valves and each indoor heat exchanger are connected to form a refrigerant cycle. The motor expansion valve is provided in the refrigerant pipe between the outdoor heat exchanger and each indoor heat exchanger.
이러한 다실형 공기조화기에서 난방운전을 하는 경우, 압축기에서 유출된 고온고압의 냉매는 사방향 밸브, 실내 열교환기, 전동팽창밸브를 통과 후 실외 열교환기를 거쳐 압축기로 재순환된다.When the heating operation is performed in such a multi-chamber air conditioner, the high temperature and high pressure refrigerant flowing out of the compressor is recycled to the compressor after passing through a four-way valve, an indoor heat exchanger, and an electric expansion valve, and then through an outdoor heat exchanger.
이러한 난방 운전시 정지 중인 실내기의 개도를 닫을 경우 냉매흐름이 막혀 냉매가 정체하게 된다. 이러한 정체된 냉매는 포화온도보다 낮은 외부온도에 의해 액화되면서 압력이 낮아지게 되고, 이에 따라 정지된 실내기로 냉매가 유입되면서 운전 중인 실내기 쪽에는 냉매 부족현상이 발생하게 된다.When the opening degree of the indoor unit is stopped during the heating operation, the refrigerant flow is blocked and the refrigerant is stagnated. The stagnant refrigerant is liquefied by an external temperature lower than the saturation temperature, the pressure is lowered, and as a result of the refrigerant flowing into the stationary indoor unit, the refrigerant shortage occurs in the indoor unit in operation.
이러한 문제점을 해결하기 위해서 종래의 기술에서는 난방운전시 정지 중인 실내기에 대해서 냉매가 정체됨을 방지하기 위해 지속적으로 최소 개도를 유지하도록 하거나, 완전히 닫힌 상태로 두다가 일정시간이 지나면 개도를 한꺼번에 열어주는 냉매회수운전을 하는 방법이 사용된다.In order to solve this problem, the conventional technology maintains the minimum opening degree continuously to prevent the refrigerant from stagnation in the indoor unit which is stopped during heating operation, or keeps it completely closed and opens the opening degree at a time after a certain time. The recovery operation is used.
그러나, 실외 온도가 예들 들어 -10℃ 이하로 낮아지면, 냉매에 포함된 오일의 점도가 커져 오일의 흐름이 원활하지 못하게 되어 정지 중인 실내기의 전자팽창밸브에서 막힘 현상이 발생할 수 있다.However, when the outdoor temperature is lowered to, for example, -10 ° C. or less, the viscosity of the oil contained in the refrigerant is increased so that the flow of oil is not smooth, and clogging may occur in the electronic expansion valve of the stationary indoor unit.
이를 방지하기 위해 최소 개도를 많이 열어 둘 경우 정지중인 실내기에 많은 냉매가 흐르게 되어 냉매 사이클의 효율이 떨어지는 문제점이 생긴다. 또한, 장배관에서는 정격 표준조건보다 최소 개도를 많이 열어줘야 하는 등 변화에 대한 능동적인 제어가 필요하다. 특히, 3실 이상의 다실형 공기조화기에서는 최소 개도를 일정한 값으로 설정할 경우 최적의 냉매 사이클이 최적으로 형성되지 않는 문제점이 있다.In order to prevent this, when a lot of minimum openings are opened, a large amount of refrigerant flows to the indoor unit at rest, which causes a problem of low efficiency of the refrigerant cycle. In addition, long piping requires active control of changes, such as opening the minimum opening more than the rated standard conditions. In particular, in the multi-room air conditioner of three or more rooms, there is a problem in that an optimal refrigerant cycle is not optimally formed when the minimum opening degree is set to a constant value.
본 발명은 전술한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 다실형 공기조화기의 난방운전시 실내외 온도가 상당히 변화하더라도 냉매 사이클의 최적화를 위해 적정량의 오일 및 냉매의 양이 회수되도록 정지 중인 실내기의 전동팽창밸브의 개도를 제어하는 데 있다.The present invention is to solve the above problems, an object of the present invention is to stop the recovery of the appropriate amount of oil and refrigerant to optimize the refrigerant cycle even if the indoor and outdoor temperature changes significantly during the heating operation of the multi-chamber air conditioner This is to control the opening degree of the electric expansion valve of the indoor unit.
도 1은 본 발명에 따른 다실형 공기조화기의 난방운전시의 냉매사이클에 대한 대략적인 구성도이다.1 is a schematic configuration diagram of a refrigerant cycle during heating operation of a multi-chamber air conditioner according to the present invention.
도 2는 본 발명에 따른 다실형 공기조화기의 제어블록도이다.2 is a control block diagram of a multi-chamber air conditioner according to the present invention.
도 3a, 3b는 본 발명에 따른 다실형 공기조화기에서 정지 중인 실내기의 전동팽창밸브를 제어하는 방법에 대한 제어흐름도이다.Figure 3a, 3b is a control flow diagram for a method for controlling the electric expansion valve of the indoor unit is stopped in the multi-chamber air conditioner according to the present invention.
*도면의 주요 기능에 대한 부호의 설명** Description of the symbols for the main functions of the drawings *
10 : 압축기 11 : 사방향 밸브10 compressor 11 four-way valve
12 : 실외 열교환기 13,23,33 : 실내기12: outdoor heat exchanger 13,23,33: indoor unit
14,24,34 ; 전동팽창밸브 15 : 실외 열교환기 입구온도센서14,24,34; Electric expansion valve 15: Inlet temperature sensor of outdoor heat exchanger
16,26,36 : 실내 공기온도센서 17 : 실외 공기온도센서16,26,36: Indoor air temperature sensor 17: Outdoor air temperature sensor
40 : 실외제어기 50 : 실내제어기40: outdoor controller 50: indoor controller
60 : 상용전원 70 : 인버터회로60: commercial power 70: inverter circuit
80 : 통신라인80: communication line
전술한 목적을 달성하기 위한 본 발명은 하나의 실외기에 마련된 복수의 실내기, 난방운전시 상기 실내기에서의 냉매를 상기 실외기측으로 회수하도록 상기 실내기에 대응되게 마련된 밸브수단을 구비하는 다실형 공기조화기에 있어서, 실외 공기온도를 검출하는 제 1온도검출수단, 실외 열교환기의 배관온도를 검출하는 제2온도검출수단, 상기 제 1온도검출수단과 제 2온도검출수단의 온도차에 기초하여 정지 중인 실내기에 대응되는 상기 밸브수단의 개도를 제어하는 밸브 제어수단을 구비한 것을 특징으로 한다.The present invention for achieving the above object is a multi-chamber air conditioner having a plurality of indoor units provided in one outdoor unit, the valve means provided corresponding to the indoor unit to recover the refrigerant from the indoor unit to the outdoor unit side during heating operation; And a first temperature detecting means for detecting an outdoor air temperature, a second temperature detecting means for detecting a pipe temperature of the outdoor heat exchanger, and a stationary indoor unit based on a temperature difference between the first temperature detecting means and the second temperature detecting means. It characterized in that it comprises a valve control means for controlling the opening degree of the valve means.
또한, 본 발명은 하나의 실외기에 마련된 복수의 실내기, 난방운전시 상기 실내기에서의 냉매를 상기 실외기측으로 회수하도록 상기 실내기에 대응되게 마련된 밸브수단을 구비하는 다실형 공기조화기에서 상기 밸브수단을 제어하는 방법에 있어서, 실외공기온도를 검출하고, 실외 열교환기의 온도를 검출하고, 상기 검출된 실외 공기온도와 실외 열교환기 온도사이의 온도차에 기초하여 정지 중인 실내기에 대응되는 상기 밸브수단의 개도량을 결정하고, 상기 결정된 개도량에 기초하여 상기 밸브수단의 개도를 제어하는 것을 특징으로 한다.In addition, the present invention is a multi-room air conditioner having a plurality of indoor units provided in one outdoor unit, the valve means provided corresponding to the indoor unit to recover the refrigerant from the indoor unit to the outdoor unit during heating operation control the valve means in the air conditioner In the method, the outdoor air temperature is detected, the temperature of the outdoor heat exchanger is detected, and the opening amount of the valve means corresponding to the indoor unit is stopped based on the detected temperature difference between the outdoor air temperature and the outdoor heat exchanger temperature. And determining the opening degree of the valve means based on the determined opening amount.
이하에서는 본 발명의 바람직한 실시예를 본 도면을 참조하여 상세하게 설명하도록 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
도 1은 본 발명에 따른 다실형 공기조화기의 난방운전시의 냉매사이클에 대한 대략적인 구성도이다.1 is a schematic configuration diagram of a refrigerant cycle during heating operation of a multi-chamber air conditioner according to the present invention.
도 1을 살펴보면, 압축기(10)의 토출측은 4방향 밸브(11)를 통해서 실외 열교환기(12)에 접속되어 있다. 실외 열교환기(12)는 냉매관(W)에 접속되어 있다. 냉매관(W)은 냉매관 (W1), 냉매관(W2) 및 냉매관(W3)으로 분기되어 있다. 분기된 냉배관(W1,W2,W3)은 각각 실내 열교환기(13,23,33)에 연결되어 있다. 냉매관(W1,W2,W3)에는 전동팽창밸브(14,24,34)가 마련되어 있다. 이 전동팽창밸브(14,24,34)의 개도정도에 따라 각각의 실내 열교환기(13,23,33) 내를순환하는 냉매의 유량이 조절되도록 되어 있다.1, the discharge side of the compressor 10 is connected to the outdoor heat exchanger 12 through a four-way valve 11. The outdoor heat exchanger 12 is connected to the refrigerant pipe W. The coolant tube W is branched into a coolant tube W1, a coolant tube W2, and a coolant tube W3. Branched cold pipes (W1, W2, W3) are connected to the indoor heat exchangers (13, 23, 33), respectively. Refrigerant pipes W1, W2 and W3 are provided with motor expansion valves 14, 24 and 34. The flow rate of the refrigerant circulating in each of the indoor heat exchangers 13, 23, 33 is adjusted in accordance with the opening degree of the electric expansion valves 14, 24, 34.
실내 열교환기(13,23,33)는 냉매관(G1,G2,G3)에 접속되어 있으며, 냉매관(G1,G2,G3)은 냉매관(G)에 연결되며, 냉매관(G)은 4방향 밸브(11)와 어큐뮬레이터(미도시)를 통해 압축기(10)의 흡입측에 접속되어 있다.The indoor heat exchanger (13, 23, 33) is connected to the refrigerant pipe (G1, G2, G3), the refrigerant pipe (G1, G2, G3) is connected to the refrigerant pipe (G), the refrigerant pipe (G) It is connected to the suction side of the compressor 10 via the 4-way valve 11 and an accumulator (not shown).
실외 열교환기 입구온도센서(15)는 실내 열교환기(13,23,33)에서 실외 열교환기(12)에 냉매가 유입되는 측의 배관온도를 검출하기 위해 실외 열교환기(12)의 입구측 냉매관의 측면에 접속되어 있다.The outdoor heat exchanger inlet temperature sensor 15 detects a pipe temperature at the side where the refrigerant is introduced into the outdoor heat exchanger 12 from the indoor heat exchanger 13, 23, 33. It is connected to the side of the tube.
실내 공기온도센서(16,26,36)와 실외온도센서(17)는 각 실내기의 실내 공기온도와 실외기의 실외 공기온도를 검출하기 위해 실내기와 실외기에 접속되어 있다.The indoor air temperature sensors 16, 26, 36 and the outdoor temperature sensor 17 are connected to the indoor unit and the outdoor unit to detect the indoor air temperature of each indoor unit and the outdoor air temperature of the outdoor unit.
한편, 각 실내 열교환기(13,23,33)에 대응되는 전동팽창밸브(14,24,34)는 실외기 측에 마련된 밸브 제어수단(미도시)에 의해 개도가 조절된다.On the other hand, the electric expansion valves (14, 24, 34) corresponding to the respective indoor heat exchangers (13, 23, 33) is controlled by the valve control means (not shown) provided on the outdoor unit side.
도 2는 본 발명에 따른 다실형 공기조화기의 제어블록도이다.2 is a control block diagram of a multi-chamber air conditioner according to the present invention.
도 2에 도시된 바와 같이, 실외제어기(40)는 마이크로컴퓨터와 그 주변회로를 포함하고, 실외기의 전체제어를 수행한다. 실외제어기(40)는 전동팽창밸브(14,24,34), 4방향밸브(11), 실외팬모터(FM), 실외 공기온도센서(17), 인버터회로(70)와 접속되어 있다.As shown in FIG. 2, the outdoor controller 40 includes a microcomputer and its peripheral circuits, and performs overall control of the outdoor unit. The outdoor controller 40 is connected to the electric expansion valves 14, 24 and 34, the four-way valve 11, the outdoor fan motor FM, the outdoor air temperature sensor 17, and the inverter circuit 70.
인터버회로(70)는 상용교류전원(50)에 의해 공급된 전압을 정류하고, 실외제어기(40)로부터의 명령에 따라 정류된 전압을 미리 설정된 주파수의 전압레벨로 변환한다. 이 인터버회로(70)의 출력은 구동전력으로서 압축기(10)의 모터(CM)에 공급된다.The inverter circuit 70 rectifies the voltage supplied by the commercial AC power supply 50, and converts the rectified voltage into a voltage level of a preset frequency according to a command from the outdoor controller 40. The output of the interleaver circuit 70 is supplied to the motor CM of the compressor 10 as driving power.
실내기(B1,B2,B3)는 실내제어기(50)를 포함한다. 실내제어기(50)는 마이크로컴퓨터와 그 주변회로를 포함하고, 실내기의 전체제어를 수행한다.The indoor units B1, B2 and B3 include an indoor controller 50. The indoor controller 50 includes a microcomputer and its peripheral circuits and performs overall control of the indoor unit.
실내제어기(50)는 실내온도센서(16,26,36), 실내팬모터(FM)와 도시되지 않은 원격제어기(일예로 리모컨)가 접속되어 있다.The indoor controller 50 is connected to an indoor temperature sensor 16, 26, 36, an indoor fan motor FM, and a remote controller (for example, a remote controller) not shown.
실내제어기(50)는 실외제어기(40)에 통신라인(90)을 통해 접속되어 있다.The indoor controller 50 is connected to the outdoor controller 40 through the communication line 90.
이하에서는 도 2에서의 동작을 살펴보기로 한다.Hereinafter, the operation in FIG. 2 will be described.
각각의 실내제어기(50)는 실내 공기온도센서(16,26,36)를 통해 검출된 실내 공기온도를 실외제어기(50)로 전송한다.Each indoor controller 50 transmits the indoor air temperature detected by the indoor air temperature sensors 16, 26, 36 to the outdoor controller 50.
실외제어기(50)는 압축기(10)에서 토출된 냉매의 흐름이 4방향 밸브(11), 각 실내 열교환기(13,23,33), 전동팽창밸브(14,24,34), 실외 열교환기(12), 4방향 밸브(11)로 형성되도록 한다. 이에 따라, 난방운전이 수행된다. 즉, 난방운전시, 실외제어기(40)는 4방 밸브(11)를 난방운전으로 전환시킴과 동시에, 실내제어기(50)로부터의 제어신호 및 상술한 각종 센서의 검출결과에 기초하여, 전동팽창밸브(14,24,34), 실외팬모터(FM), 압축기 모터(CM)의 회전수 등을 제어하도록 되어 있다.In the outdoor controller 50, the flow of refrigerant discharged from the compressor 10 is four-way valve 11, each indoor heat exchanger (13, 23, 33), electric expansion valve (14, 24, 34), outdoor heat exchanger 12, the four-way valve (11) to be formed. Thus, the heating operation is performed. That is, during the heating operation, the outdoor controller 40 switches the four-way valve 11 to the heating operation, and at the same time, based on the control signal from the indoor controller 50 and the detection result of the various sensors described above, the electric expansion is performed. The rotation speeds of the valves 14, 24 and 34, the outdoor fan motor FM and the compressor motor CM are controlled.
또한, 실외제어기(40)는 밸브 제어수단으로 동작하여 운전 중인 실내기 및 정지 중인 실내기에 해당하는 전동팽창밸브의 개도정도를 제어하여 실내기의 공조능력을 조정한다. 이때, 실외제어기(40)는 전동팽창밸브(14,24,34)의 개도를 예를 들면 481스텝(제어스텝은, 0∼480)의 범위에서 제어한다. 이때, 스텝 0은 전동팽창밸브의 완전폐쇄상태이고, 스텝 480은 완전개방상태이다.In addition, the outdoor controller 40 operates as a valve control means to control the degree of opening of the electric expansion valve corresponding to the indoor unit in operation and the stationary indoor unit to adjust the air conditioning capacity of the indoor unit. At this time, the outdoor controller 40 controls the opening degree of the electric expansion valves 14, 24, and 34, for example in the range of 481 steps (control step is 0-480). At this time, step 0 is a fully closed state of the electric expansion valve, and step 480 is a fully open state.
도 3a와 도 3b는 본 발명에 따른 다실형 공기조화기에서 정지 중인 실내기의 전동팽창밸브를 제어하는 방법에 대한 제어흐름도이다.3a and 3b is a control flow diagram for a method for controlling the electric expansion valve of the indoor unit is stopped in the multi-chamber air conditioner according to the present invention.
도 3a를 살펴보면, 실외제어기(40)는 각 실내기제어기(50)와 통신하여 정지중인 실내기가 있는지를 판단한다(S100).Referring to FIG. 3A, the outdoor controller 40 determines whether there is an indoor unit that is stopped by communicating with each indoor controller 50 (S100).
판단결과 정지중인 실내기가 있는 경우, 실외제어기(40)는 정지 중인 실내기의 수를 판단한다(S110).If the indoor unit is stopped as a result of the determination, the outdoor controller 40 determines the number of the indoor unit is stopped (S110).
판단결과 정지 중인 실내기의 수가 1개인 경우, 실외제어기(40)는 실외 공기온도센서(17)를 통해 실외기의 실외 공기온도를 검출한다(S120).As a result of determination, when the number of stationary indoor units is one, the outdoor controller 40 detects the outdoor air temperature of the outdoor unit through the outdoor air temperature sensor 17 (S120).
그리고, 실외제어기(40)는 실외 열교환기 입구온도센서를 통해 실외 열교환기의 입구온도를 검출한다(S130).In addition, the outdoor controller 40 detects the inlet temperature of the outdoor heat exchanger through the outdoor heat exchanger inlet temperature sensor (S130).
이어서, 실외제어기(40)는 검출된 실외 공기온도와 실외 열교환기의 입구온도사이의 온도차를 산출한다(S140).Subsequently, the outdoor controller 40 calculates a temperature difference between the detected outdoor air temperature and the inlet temperature of the outdoor heat exchanger (S140).
온도차가 산출되면, 실외제어기(40)는 산출된 온도차와 미리 설정된 온도차의 상한값을 비교한다(S150).When the temperature difference is calculated, the outdoor controller 40 compares the calculated temperature difference with an upper limit value of the preset temperature difference (S150).
비교결과 온도차가 상한값보다 큰 경우, 실외제어기(40)는 냉매가 부족하다고 판단하여 초기개도에 미리 설정된 기준개도를 더한 개도로 정지 중인 전동팽창밸브의 개도량을 결정한다(S151).As a result of the comparison, when the temperature difference is greater than the upper limit value, the outdoor controller 40 determines that the refrigerant is insufficient and determines the opening amount of the motor-expansion valve that is stopped at the opening degree by adding the predetermined reference opening degree to the initial opening degree (S151).
만약, 비교결과 온도차가 상한값보다 작은 경우, 실외제어기(40)는 온도차를 미리 설정된 이 온도차의 하한값과 비교한다(S160).If, as a result of the comparison, the temperature difference is smaller than the upper limit value, the outdoor controller 40 compares the temperature difference with a preset lower limit value of the temperature difference (S160).
단계(S160)에서의 비교결과 온도차가 하한값보다 적은 경우, 실외제어기(40)는 정지 중인 실내기에 대응되는 전동팽창밸브에서 냉매가 적게 회수되도록 초기개도에서 미리 설정된 기준개도를 뺀 개도로 정지 중인 전동팽창밸브의 개도량을 결정한다(S161). 또한, 단계(S160)에서의 비교결과 온도차가 하한값보다 큰 경우, 실외기제어기(40)는 온도차가 정상범위 내에 있으므로 초기개도로 정지 중인 전동팽창밸브의 개도량을 결정한다(S170).When the temperature difference is less than the lower limit as a result of the comparison in step S160, the outdoor controller 40 stops the motor at the opening degree by subtracting the preset reference opening from the initial opening so that less refrigerant is recovered from the electric expansion valve corresponding to the indoor unit in operation. Opening amount of the expansion valve is determined (S161). In addition, when the temperature difference is greater than the lower limit as a result of the comparison in step S160, the outdoor unit controller 40 determines the amount of opening of the electric expansion valve that is stopped at the initial opening degree because the temperature difference is within the normal range (S170).
개도량이 결정되면, 실외제어기(40)는 결정된 개도량을 유지하도록 정지 중인 실내기의 전동팽창밸브의 개도를 조절한다.When the opening amount is determined, the outdoor controller 40 adjusts the opening degree of the electric expansion valve of the stationary indoor unit to maintain the determined opening amount.
이하에서는 단계(S110)에서의 판단결과 정지 중인 실내기의 수가 2개 이상인 경우에 대해서 도 3b를 참조하여 설명한다.Hereinafter, a case in which the number of the indoor units that are stopped is two or more as a result of the determination in step S110 will be described with reference to FIG. 3B.
도 3b에 도시된 바와 같이, 단계(S110)에서의 판단결과 정지 중인 실내기의 수가 2개 이상인 경우, 실외제어기(40)는 실외 공기온도센서(17)를 통해 실외기의 실외 공기온도를 검출한다(S200).As shown in FIG. 3B, when the determination result in step S110 is that the number of stationary indoor units is two or more, the outdoor controller 40 detects the outdoor air temperature of the outdoor unit through the outdoor air temperature sensor 17 ( S200).
그리고, 실외제어기(40)는 실외 열교환기 입구온도센서(15)를 통해 실외 열교환기(12)의 입구온도를 검출한다(S210).In addition, the outdoor controller 40 detects the inlet temperature of the outdoor heat exchanger 12 through the outdoor heat exchanger inlet temperature sensor 15 (S210).
이어서, 실외제어기(40)는 검출된 실외 공기온도와 실외 열교환기(12)의 입구온도사이의 온도차를 산출한다(S220).Subsequently, the outdoor controller 40 calculates a temperature difference between the detected outdoor air temperature and the inlet temperature of the outdoor heat exchanger 12 (S220).
온도차가 산출되면, 실외제어기(40)는 산출된 온도차와 미리 설정된 온도차의 상한값을 비교한다(S230).When the temperature difference is calculated, the outdoor controller 40 compares the calculated temperature difference with an upper limit value of the preset temperature difference (S230).
비교결과 온도차가 상한값보다 큰 경우, 실외제어기(40)는 초기개도에 미리 설정된 기준개도를 더한 개도로 정지 중인 전동팽창밸브의 개도량을 결정한다(S231).As a result of the comparison, when the temperature difference is greater than the upper limit value, the outdoor controller 40 determines the amount of opening of the electric expansion valve that is stopped at an opening degree obtained by adding a predetermined reference opening degree to an initial opening degree (S231).
만약, 비교결과 온도차가 상한값보다 적은 경우, 실외제어기(40)는 온도차를 미리 설정된 이 온도차의 하한값과 비교한다(S240).If, as a result of the comparison, the temperature difference is less than the upper limit value, the outdoor controller 40 compares the temperature difference with a preset lower limit value of the temperature difference (S240).
단계(S240)에서의 비교결과 온도차가 하한값보다 적은 경우, 실외제어기(40)는 초기개도에서 미리 설정된 기준개도를 뺀 개도로 정지 중인 전동팽창밸브의 개도량을 결정한다(S241). 또한, 단계(S240)에서의 비교결과 온도차가 하한값보다 큰 경우, 실외기제어기(40)는 온도차가 정상범위 내에 있으므로 초기개도로 정지 중인 전동팽창밸브의 개도량을 결정한다(S250).When the temperature difference is less than the lower limit as a result of the comparison in step S240, the outdoor controller 40 determines the opening amount of the motor-expansion valve that is stopped at the opening degree minus the preset reference opening degree at the initial opening degree (S241). In addition, when the temperature difference is greater than the lower limit as a result of the comparison in step S240, since the temperature difference is within the normal range, the outdoor unit controller 40 determines the amount of opening of the electric expansion valve being stopped at the initial opening degree (S250).
개도량이 결정되면, 실외제어기(40)는 정지 중인 실내기들의 실내 공기온도센서를 통해 실내 공기온도를 검출한다(S260).When the opening amount is determined, the outdoor controller 40 detects the indoor air temperature through the indoor air temperature sensors of the indoor units in operation (S260).
그리고, 실외제어기(40)는 검출된 실내 공기온도들을 서로 비교하여 온도가 서로 다른지를 판단한다(S270).In addition, the outdoor controller 40 compares the detected indoor air temperatures with each other to determine whether the temperatures are different from each other (S270).
판단결과 실내 공기온도가 서로 다른 경우, 실외제어기(40)는 단계(S230)에서 산출된 설정개도에 대해서 일정한 가중치를 결정한다(S280). 이때, 실외제어기(40)는 정지중인 실내기의 전동팽창밸브의 증가 또는 감소하는 평균 개도값이 일정하도록 제어한다. 예를 들면, 정지 중인 제 1실내기의 실내 공기온도가 20℃, 제 2실의 실내 공기온도가 10℃인 경우 실외제어기(40)는 실내 공기온도가 상대적으로 낮은 제 2실내기에 대응되는 전동팽창밸브의 개도를 미리 설정된 초기개도보다 더 열어주어 온도저하에 따른 냉매의 정체를 막고, 열어 준 개도만큼 실내 공기온도가 상대적으로 높은 제 1실내기에 대응되는 실내기에 대응되는 전동팽창밸브의 개도를 닫아주어 냉매 사이클의 효율을 향상시키도록 가중치가 결정된다.If the indoor air temperature is different as a result of the determination, the outdoor controller 40 determines a predetermined weight with respect to the set opening degree calculated in step S230 (S280). At this time, the outdoor controller 40 controls so that the average opening value of the increase or decrease of the electric expansion valve of the stationary indoor unit is constant. For example, when the indoor air temperature of the stationary first room is 20 ° C. and the indoor air temperature of the second room is 10 ° C., the outdoor controller 40 may perform electric expansion corresponding to the second room where the indoor air temperature is relatively low. By opening the valve opening more than the preset initial opening, it prevents the refrigerant from congestion due to the temperature drop, and closes the opening of the electric expansion valve corresponding to the indoor unit corresponding to the first room where the indoor air temperature is relatively high as the opening degree. The weight is determined to improve the efficiency of a given refrigerant cycle.
이어서, 실외제어기(40)는 결정된 개도량과 가중치를 고려하여 정지 중인 실내기들의 전동팽창밸브의 개도를 조절한다(S290).Subsequently, the outdoor controller 40 adjusts the opening degree of the electric expansion valve of the indoor units that are stationary in consideration of the determined opening amount and weight (S290).
만약, 단계(S270)에서의 판단결과 실내 공기온도가 서로 같은 경우, 실외제어기(40)는 결정된 개도량에 기초하여 정지 중인 실내기들의 전동팽창밸브의 개도를 조절한다(S300).If the indoor air temperature is the same as the determination result at step S270, the outdoor controller 40 adjusts the opening degree of the electric expansion valves of the indoor units at rest based on the determined opening amount (S300).
이상에서 상세히 설명한 바와 같이, 본 발명은 난방운전시 정지 중인 실내기의 전동팽창밸브의 개도를 제어함에 있어 실내외 온도에 따른 오일점도의 영향을 반영하고, 실내외 온도 및 압축기의 능력에 따라 정지 중인 실내기의 최적 개도를 제어함으로서 냉매 정체 현상을 방지하여 냉매 사이클의 효율을 향상시키는 효과가 있다.As described in detail above, the present invention reflects the influence of the oil viscosity according to the indoor and outdoor temperature in controlling the opening degree of the electric expansion valve of the indoor unit is stopped during heating operation, and according to the indoor and outdoor temperature and the capacity of the compressor By controlling the optimum opening degree, it is possible to prevent the refrigerant from stalling and to improve the efficiency of the refrigerant cycle.
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| WO2009072758A3 (en) * | 2007-12-04 | 2009-09-03 | Kyungdong Network Co., Ltd. | Method for controlling heating system |
| KR101191758B1 (en) | 2012-05-17 | 2012-10-16 | (주)동양테크놀로지 | High efficency heat pump air conditioning unit controlled by remote controller of smart phone application |
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| CN100465538C (en) * | 2004-04-30 | 2009-03-04 | 乐金电子(天津)电器有限公司 | Valve support base for air-conditioner with one outdoor set and multiple indoor sets |
| KR100600586B1 (en) * | 2004-12-24 | 2006-07-13 | 삼성전자주식회사 | Method for control electronic expansion valve of multi air conditioner system |
| CN102645004B (en) * | 2012-04-23 | 2015-07-15 | 宁波奥克斯空调有限公司 | Mute air conditioner and control method for same |
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| JPH03241260A (en) * | 1990-02-16 | 1991-10-28 | Matsushita Refrig Co Ltd | Multi-room air-conditioner |
| JPH04214154A (en) * | 1990-12-05 | 1992-08-05 | Matsushita Refrig Co Ltd | Multi-chamber type air-conditioning machine |
| KR20000047501A (en) * | 1998-12-21 | 2000-07-25 | 다카노 야스아키 | Control method for electro-drive expansion valve |
| KR20010001013A (en) * | 1999-06-01 | 2001-01-05 | 구자홍 | Defrosting method for air conditioner |
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- 2002-08-06 KR KR20020046369A patent/KR100444971B1/en not_active IP Right Cessation
- 2002-10-31 CN CNB021481180A patent/CN1220006C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03241260A (en) * | 1990-02-16 | 1991-10-28 | Matsushita Refrig Co Ltd | Multi-room air-conditioner |
| JPH04214154A (en) * | 1990-12-05 | 1992-08-05 | Matsushita Refrig Co Ltd | Multi-chamber type air-conditioning machine |
| KR20000047501A (en) * | 1998-12-21 | 2000-07-25 | 다카노 야스아키 | Control method for electro-drive expansion valve |
| KR20010001013A (en) * | 1999-06-01 | 2001-01-05 | 구자홍 | Defrosting method for air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009072758A3 (en) * | 2007-12-04 | 2009-09-03 | Kyungdong Network Co., Ltd. | Method for controlling heating system |
| KR100952985B1 (en) * | 2007-12-04 | 2010-04-15 | 주식회사 경동네트웍 | Method for controlling heating system |
| KR101191758B1 (en) | 2012-05-17 | 2012-10-16 | (주)동양테크놀로지 | High efficency heat pump air conditioning unit controlled by remote controller of smart phone application |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040013442A (en) | 2004-02-14 |
| CN1220006C (en) | 2005-09-21 |
| CN1474105A (en) | 2004-02-11 |
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