Method for controlling opening of electronic expansion valve in heat pump water heater system
A technology of electronic expansion valve and heat pump water heater, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc. It can solve the problems of signal feedback parameter cycle oscillation, refrigerant circulation volume change, system fluctuation, etc., and achieve the maintenance of suction superheat Smooth, average performance coefficient improvement, avoiding the effect of over-regulation
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[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] figure 1 It is a structural schematic diagram of a heat pump water heater system, including a heat pump water heater system composed of a compressor 4, a hot water tank 5, a controller 6, an electronic expansion valve 7, an evaporator 1, and a heat exchanger 8. The outlet of the compressor 4 is connected to the The inlet of the heat exchanger 8 is connected, the outlet of the heat exchanger 8 is connected with the inlet of the evaporator 1 through the electronic expansion valve 7, the heat exchanger 8 is installed in the hot water tank 5, and the evaporator The outlet of the evaporator 1 is connected to the inlet of the compressor 4, the inlet of the evaporator 1 is equipped with a pressure sensor 2, the suction port of the compressor is equipped with a temperature sensor 3, and the controller 6 is connected with the electronic expansi...
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