The air source heat pump water unit is the equipment,which takeheat in the air (low heat source), after highly efficient concentration,convert to high heat power. The equipment include a compressor, a condenser,an evaporator,an expansion valve,a fan motor and controller box. Through compressor's working,theequipmentchange the refrigerant status physically(gas-liguid-gas), thus repeat the same cycle,absorb and give out heat,make the water get hotter gradually. The hot water is distributed to the consumer through a pipeline.