From the perspective of compressor types, there are fully enclosed and semi enclosed piston compressors, scroll compressors, semi enclosed screw compressors, etc., which are classified according to unit capacity. There are villa type small units and medium to large units, which are classified according to unit structure. There are integrated units and modular units, which are classified according to function. There are general heat pump units, heat recovery units The principle of air energy heat pump is based on the "reverse Carnot" principle and the reverse Carnot cycle principle. By operating the compressor system, it absorbs heat from the air to produce hot water. The specific process is as follows: the compressor compresses the refrigerant, and after compression, the temperature rises to a higher level. After passing through the condenser in the water tank, hot water is produced. After heat exchange, the refrigerant returns to the compressor for the next cycle. In this process, the air heat is absorbed by the evaporator and introduced into the refrigerant, which is then introduced into the water to generate hot water. A new generation of water heaters heated by compressor air, namely air energy heat pump water heaters. Visually speaking, the "outdoor unit" compresses air like an air pump, causing the air temperature to rise, and then conducts heat into the indoor water storage tank through a liquid that will boil at -17 ℃, and then releases the heat and conducts it into the water. Using the working principle of heat pumps for heating, which is opposite to air conditioning refrigeration - the national refrigeration standard is 1000 watts, while electric refrigeration is 2800 watts. According to the principle of heat balance, a minimum of 2800 watts of heat can be generated at the same time. With the input of 1000 watts of electricity, the actual heat generated ranges from 3000 to 4000 watts. Transporting this heat to an insulated water tank consumes only a quarter of the electricity consumption of an electric water heater (even if the thermal efficiency of an electric water heater is 100%, the input of 1000 watts of heat is only 1000 watts)
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