Debugging method of variable frequency air conditioner
A technology of an inverter air conditioner and a debugging method, which is applied to the control field of air conditioners, and can solve the problems of low exhaust temperature, S-shaped fluctuation, and unreasonable control methods of inverter air conditioners.
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example 1
[0035] The inverter air conditioner operates under the rated cooling condition, and its corresponding first predetermined high frequency f1 is 63 Hz. When the inverter air conditioner runs smoothly, its cooling capacity and power meet the requirements. In this steady state, the first actual exhaust temperature T01 of the inverter air conditioner is 82°C, and the first expansion valve opening degree B01 of the electronic expansion valve is 320 steps. The first target exhaust gas temperature Tt1 is set to be the same as the first actual exhaust gas temperature T01, that is, Tt1=82°C, and the first minimum expansion valve opening Bm1 of the electronic expansion valve needs to be lower than the first expansion valve opening B01, that is, Tentatively set as 120 steps, that is, Bm1=120. Since the exhaust temperature of the inverter air conditioner rises faster when it is running at high frequency, the target exhaust temperature can be reached quickly. Therefore, under this high-fr...
example 2
[0038] The inverter air conditioner operates under intermediate cooling conditions, and its corresponding second predetermined low frequency f2 is 21 Hz. When the inverter air conditioner runs smoothly, its cooling capacity and power meet the requirements. In this stable running state, the second actual exhaust temperature T02 of the inverter air conditioner is 62° C., and the opening degree B02 of the second expansion valve of the electronic expansion valve is 80 steps. Since the exhaust temperature rises slowly under low frequency operation, in order to quickly reach the target exhaust temperature and ensure that the exhaust temperature will not be too high, the second minimum expansion valve opening Bm2 of the electronic expansion valve is set to be higher than the first The number of steps of the second expansion valve opening B02 is 20 steps more, that is, Bm2=100. In addition, in order to avoid S-shaped fluctuations in the exhaust temperature, the target exhaust tempera...
example 3
[0041]The inverter air conditioner operates under the 25% cooling condition, and the corresponding third predetermined low frequency f3 is 13 Hz. In the existing air conditioner market, only some inverter air conditioners can operate under 25% cooling or heating conditions, such as 3P inverter air conditioners. When the inverter air conditioner runs stably and its refrigeration capacity and power meet the requirements, it can be determined that the third actual exhaust temperature T03 is 58°C, and the corresponding opening degree B03 of the third expansion valve is 60 steps. In order to quickly reach the target exhaust temperature without causing the exhaust temperature to be too high, the third minimum expansion valve opening Bm3 of the electronic expansion valve is tentatively set at 80 steps, which is 20 steps higher than the third expansion valve opening B03. In addition, in order to avoid S-shaped fluctuations in the exhaust temperature, the target exhaust temperature Tt3...
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