| 摘要 |
<P>PROBLEM TO BE SOLVED: To standardize system composition apparatus such as a heat exchanger and heating apparatus, to reduce the number of times of maintenance work, and to obtain a sufficient noise preventive effect. Ž<P>SOLUTION: When passing thorough a circulating refrigerant heat exchanger 8, cooling water and cooling oil increased in temperature after finishing cooling action to a power conversion device 2 and a main transformer 3 is heat-exchanged with cooling air sent from an evaporator 11 side, and sent to the power conversion device 2 and the main transformer 3 again after being sufficiently cooled. At that time, the temperature of the cooling air sent out to the circulating refrigerant heat exchanger 8 side by rotations of a fan 15 can be kept at a predetermined temperature set in advance regardless of the external temperature of a vehicle 1. Therefore, regardless of weather environment in a local area in which the vehicle 1 is operated, a heat-exchanging function of the circulating refrigerant heat exchanger 8 can be kept at a fixed level. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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