To improve a cooling capability by lowering an inlet temperature of a liquefied refrigerant to be supplied to a pressure reducing means.
A discharge tube 46 guided from a compressor CM is connected to a primary condensing unit 48a of an air-cooled condenser 48. A first refrigerant tube 50 guided from the unit 48a is connected to a primary condensing unit 52a of a water-cooled condenser 52. A second refrigerant tube 54 guided from the unit 52a is connected to an oil cooler. A third refrigerant tube 56 guided from the cooler is connected to a secondary condensing unit 48b of the condenser 48. A fourth refrigerant tube 58 guided from the unit 48b is connected to a secondary condensing unit 52b of the condenser 52 through a receiver tank 60 and a dryer 62. A fifth refrigerant tube 64 guided from the unit 52b is connected to an evaporator EV1 through a heat exchanger 66 and an expansion valve EX1. A suction tube 68 guided from the evaporator EV1 is connected to the compressor CM.
| JP2008289310 | MOTOR DRIVE AND REFRIGERATOR USING THE SAME |
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TOTANI KO
MIYAZAKI SHINJI
