Air conditioner and control method thereof
A control method and air conditioner technology, which is applied in air conditioning systems, heating and ventilation control systems, heating methods, etc., can solve problems such as feeling too cold, increasing indoor throttling noise, and not cooling down, so as to achieve flexible operation and good comfort , a wide range of effects
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no. 1 example
[0040] The user selects mode one to run.
[0041] The following constants are preset in the air conditioner: flow constant A1=A2=A3=5; number of times B1=20, B2=B3=15; time constant M=3; compressor frequency constant H1=40, H2=80.
[0042] During normal cooling, that is, when controlled according to the existing basic cooling mode, the first sensor measures that when the user uses it, the dry bulb temperature of the indoor environment is T1=27°C, and the wet bulb temperature t1=19°C, and the corresponding dew point temperature is calculated T2 = 14.7°C. According to the indoor air-conditioning load, the flow rate of the electronic expansion valve at this time is 12.5L / min, and the corresponding pulse (or opening) of the electronic expansion valve is 300,
[0043] At this time, the evaporation temperature T3 of the refrigerant in the indoor heat exchanger measured by the second sensor is 13°C. Since the dew point temperature T2 = 14.7°C > evaporation temperature T3 = 13°C, th...
no. 2 example
[0048] The user selects mode two to run.
[0049] When the first sensor measures that the dry bulb temperature of the indoor environment is 23° C. and the wet bulb temperature is 19° C. when the user uses it, the corresponding dew point temperature T2 = 16.9° C. is calculated.
[0050] During conventional dehumidification, that is, when dehumidification is carried out according to the existing basic cooling mode, the frequency of the compressor runs at 60Hz. At this time, the cooling capacity of the air conditioner is about 3000W, and the temperature is greatly reduced while dehumidifying.
[0051] When the user selects mode 2, first limit the frequency of compressor 1 to below H1=40Hz, at this time, the electronic expansion valve pulse of the conventional inverter air conditioner is 150, and the refrigerant in the indoor heat exchanger measured by the second sensor The evaporating temperature T3 = 17°C, the cooling capacity of the air conditioner is 1500W, the cooling capacit...
no. 3 example
[0057] The user selects mode three to run.
[0058] When the first sensor measures that the dry bulb temperature of the indoor environment is 23° C. and the wet bulb temperature is 19° C. when the user uses it, the corresponding dew point temperature T2 = 16.9° C. is calculated.
[0059] When the user selects mode 3, the target frequency of the compressor is changed to H2=80Hz or above. At this time, the electronic expansion valve pulse of the conventional inverter air conditioner is 350, and the evaporation temperature of the refrigerant in the indoor heat exchanger is T3=13°C. The refrigeration capacity of the device is 3800W.
[0060] Since the evaporating temperature T3+4°C=13°C+4°C=17°C > the dew point temperature T2=16.9°C, on the basis of the control of the existing basic refrigeration mode, the flow rate of the throttling device is reduced by A3%=5%, It is judged once after M=3 minutes. This time, the flow rate of the electronic expansion valve is appropriately reduce...
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