September 24, 2021
The invention relates to a solar energy heat pump hot water system and a control method for automatically regulating the charging amount of working fluid. The heat pump unit comprises a compressor, a condenser, an electronic expansion valve, an evaporator, a reservoir for a heat pump, an electromagnetic three-way valve and an electromagnetic valve The solar energy unit comprises a solar energy collector, a solar energy reservoir and a working medium pump; the circulating water unit comprises a water tank, a water pump and a heat storage tank; The control unit consists of a microcomputer, a temperature sensor, a pressure sensor, and a liquid level sensor. The invention can make full use of the heat energy and solar energy in the air when using the solar energy unit and the heat pump unit to make hot water, and through controlling the components of the electromagnetic three-way Valve, the electromagnetic valve, the compressor, etc. , in order to ensure the solar energy unit and heat pump unit in the work process can maintain the best charge of working fluid.
