DYNAMIC HEATING FREQUENCY OPTIMIZATION AND CONTROL METHOD FOR TWO-STAGE VARIABLE-FREQUENCY AND TWO-STAGE COMPRESSION HEAT PUMP WATER HEATER

摘要

A dynamic heating frequency optimization and control method for a two-stage variable-frequency and two-stage compression heat pump water heater, for optimizing and adjusting, throughout the operation of dynamic heating, the operating frequencies of a low-pressure stage variable-frequency compressor and a high-pressure stage variable-frequency compressor, segmenting and setting the operating frequency of the low-pressure stage compressor (1), enabling the segmented operating frequencies of the low-pressure stage variable-frequency compressor (1) in various temperature ranges to be distributed in a manner of arithmetic progression, such that the total energy consumption of the heat pump water heater throughout the operation is minimized. When the actual operation condition of the heat pump water heater deviates from a reference operation condition, the segmented operation frequency of the low-pressure stage variable-frequency compressor (1) corresponding to each temperature range of a water tank (7) is corrected according to the actual outdoor temperature.