Patent ID: 6701733
Filing Date: 2004-03-09
Classification: B63B,B63H,B63J,F01P,F25B

Abstract:
In a boat having an engine and a raw-water pump that is driven directly by the engine for cooling the engine, the improvement comprising:a refrigerant compressor driven by the engine; a refrigerant condenser having a refrigerant passage and a raw-water passage in thermal communication with each other, the refrigerant passage having an inlet connected to an outlet of the compressor, the raw-water passage having an inlet connected to a raw-water intake port in a hull of the boat and an outlet connected to an inlet of the raw water pump for cooling the refrigerant, the raw water passage within the condenser being sealed so as to enable a suction created by the raw water pump to communicate through the condenser to the raw water intake port to draw raw water continuously through condenser as the raw water pump operates; and an evaporator assembly connected between an outlet of the refrigerant passage of the condenser and an inlet of the compressor for exchanging heat with ambient air in the boat.