A standard configuration of the heat pump air conditioner is used as a reference to change a certain design parameter (indoor and outdoor heat exchangers and compressors), and determine the reasonable cooling according to the rated cooling and rated heating conditions specified in GBP T 7725-2004. Based on the amount of charge and capillary length, the variation of heating parameters, cooling capacity, HCR EER and other performance parameters of the matched air conditioners are analyzed. The objective comparison is based on the rated cooling conditions and heating conditions. The performance difference of the designed air conditioner, the simulation calculation shows that the performance parameters of the heat pump air conditioner designed according to the cooling and heating conditions are consistent with the change of the number of the outer heat exchanger tubes. Compared with the indoor heat exchanger, the increase is small. The number of rows affected by the increase in the number of tubes increased, the increase in the number of tubes, the increase in the amount of heat, the increase in the amount of heat, and the increase in the amount of cooling, all of which increased slightly, affecting the compressor model ARI rated cooling capacity (kW). The analysis of the influence of single factor on the HCR of the fixed speed heat pump air conditioner shows that the influence of the indoor and outdoor heat exchangers and the compressor capacity on the HCR is not significant; obviously, changing the indoor and outdoor air conditioners during the rated heating and cooling Working conditions will significantly change its rated heating capacity, rated cooling capacity and HCR S. Therefore, the size of the fixed speed air conditioner HCR mainly depends on the rated working conditions, that is, the rated heating conditions (outdoor P internal temperature = 7eP20e) ) and rated cooling conditions (outdoor P internal temperature = 35e P27e), the capacity matching of indoor and outdoor heat exchangers and compressors can only change the influence of HCR synthesis factors on HCR in a small range from the above The effect of single factor change on HCR of heat pump air conditioner can be seen that the pursuit of HCR single index may lead to the reduction of air conditioner EER or COP. Therefore, in the design of air conditioner, energy saving must be As a premise of material saving, comprehensively matching the capacity of indoor and outdoor heat exchangers and compressors, it is important to seek comprehensive optimization of multiple performance parameters.
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