What is the principle of air energy?

The compressor system works to absorb the heat in the air to make hot water. The specific process is: the compressor compresses the refrigerant, and the compressed refrigerant with increased temperature passes through the condenser in the water tank to make hot water. The refrigerant after heat exchange returns to the compressor for the next cycle. In this process, the air heat is absorbed by the evaporator and introduced into the water to generate hot water.

such a new generation of water heater that heats by compressor air is the air (heat pump) water heater. Air (heat pump) water heater is just such a product. This is the working principle of air (heat pump) water heater.

during the operation of the air energy heat pump, the evaporator absorbs heat from the ambient heat energy in the air to evaporate the heat transfer working medium. After the working medium vapor is compressed by the compressor, the pressure and temperature rise. When the high-temperature vapor is condensed into liquid by a special annular tube condenser permanently bonded to the outer surface of the water storage tank, the heat released is transferred to the water in the water storage tank of the air source heat pump. The condensed heat transfer working medium returns to the evaporator through the expansion valve, and then is evaporated, and so on.

The heat transfer working medium of air energy heat pump is a special substance, whose boiling point is below minus 4℃ and freezing point is below minus 1℃ under normal pressure. This substance is liquid when it is cold, but it is easily evaporated into gas, and vice versa. In actual operation, the evaporation limit temperature of heat transfer medium in air source heat pump is about-2℃, so the ambient temperature of 5℃ is "hot" for such a low temperature, and even the snowy temperature, such as ℃, is hot by comparison, so some heat energy can still be exchanged.

Extended information:

The heat source of air energy water heater is the air we all need, and as an energy-saving product, its energy-saving degree is closely related to the COP value energy efficiency ratio. Because most air energy water heaters in the market are designed to work at -4℃. Therefore, in the south where the ambient temperature is relatively high, air energy water heaters often perform well. However, it is difficult to achieve the expected effect in the design of air energy water heaters in northern cities where the temperature is only -1℃ in winter. If the temperature is -2℃, the unit can't even start.

domestic air energy water heaters often need a water tank to heat and store hot water. Take a family of 3-5 people as an example and need a water tank of 12L-15L. Such a large-sized water tank is not easy to coordinate with the whole home, so consumers can only install it on the balcony. However, with the improvement of people's requirements for home environment, this big guy on the balcony is unwilling to be accepted by consumers.

Resources: Baidu Encyclopedia Air Energy.