Patent ID: 6634182
Filing Date: 2003-10-21
Classification: F25B,F25D

Abstract:
An ammonia refrigerator having a refrigerating cycle, in which a compressor, a condenser, an expansion valve and an evaporator are connected through piping, and using ammonia as refrigerant, comprising:a casing through which said ammonia refrigerant flows and which accommodates therein said compressor and an electric motor for driving said compressor, said electric motor having a stator winding made of aluminum system electric wires; a brine for exchanging heat with said refrigerant in said evaporator; and an inverter drive unit for controlling a capacity of said compressor in accordance with a flow rate of said brine; wherein said evaporator comprises a plate type heat exchanger, in which a plurality of plates are piled, and is so constructed that said ammonia refrigerant and said brine exchange heat with each other therein.