Patent ID: 7213407

Claim:
An air condition heat pump comprising: a) one compressor for pumping the refrigerant into a main condenser; b) at least two evaporators connecting with said main condenser; c) an expansion valve for regulating the pressure between said main condenser and said two evaporators; d) at least one control valve associated with each evaporator for stopping the refrigerant flowing during defrosting process; e) Defrosting means connecting to said compressor and utilizing the heat energy from said evaporators for defrosting; Wherein during the defrosting process, the air condition heat pump is capable of uninterrupted operation by turning off one evaporator and redirect the energy from the operation of another evaporator to said defrosting means; after the defrosting process of one evaporator is completed, another evaporator starts defrosting with same method.