Heat pump water heaters can achieve significantly higher energy efficiency, making them the most economical, energy-saving, safe, and environmentally friendly next-generation hot water production equipment. The basic principle of a heat pump water heater is as follows: It mainly consists of a compressor, heat exchanger, axial fan, insulated water tank, water pump, liquid storage tank, filter, electronic expansion valve, and electronic automatic controller. After being connected to power, it absorbs lower-temperature heat energy from the ambient heat source (such as water or air) and converts it into higher-temperature heat energy, releasing it into the circulating medium (such as water or air) as a high-temperature heat source output.
The operation of the compressor consumes electrical energy. The compressor's operation causes the refrigerant to undergo different changes and effects in different systems (i.e., evaporation for heat absorption and condensation for heat release), thereby achieving the function and purpose of recovering low-temperature heat sources to produce high-temperature heat sources. This is the basic working principle of an air source heat pump water heater.