F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
62/31
F25B 41/00 (2006.01) F04D 29/58 (2006.01) F25B 1/10 (2006.01) F25B 29/00 (2006.01) F25B 31/00 (2006.01) H02K 9/20 (2006.01)
Patent
CA 1129221
Motor Cooling System for Refrigeration Machine Abstract Motor cooling system for refrigeration machine wherein one condenser connected to a main stage of the compressor is used to satisfy the cooling requirements of the system and a second condenser connected to a subsequent higher pressure compressor stage is employed for heating a medium to satisfy heating requirements of the system. The motor cooling system contains a three-way selector valve which connects either condenser selectively to the motor housing in response to the pressure in one condenser exceeding the pressure in the other condenser to provide a sufficient liquid refrigerant to the motor for cooling motor components under all operating conditions. The selector valve comprises a horizontally extending tubular portion having an annular seat at each end of the portion and a vertically extending tubular portion attached thereon. An axially movable ball is arranged in a horizontal portion to open selectively either seat and close selectively the opposite seat in response to the refrigerant pressure acting on the ball.
354978
Carrier Corporation
Gowling Lafleur Henderson Llp
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