| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicle air conditioner which prevents a discharge temperature of a CO<SB>2</SB>refrigerant out of a compressor from rising by a simple constitution and has an excellent cooling capacity even if the CO<SB>2</SB>refrigerant is used. SOLUTION: In the vehicle air conditioner (6), the compressor (10), a gas cooler (12), an expansion valve (16) and an evaporator (18) are sequentially interposed in a circulation flow passage (8) where the CO<SB>2</SB>refrigerant is circulated in view of the flow direction of the refrigerant. The vehicle air conditioner has a first flow passage (8a) which extends from the gas cooler to the evaporator through the expansion valve and composes a part of the circulation flow passage, and a heat exchanger (14) which is interposed in the first flow passage and receives drops of drainage water generated in the evaporator. The refrigerant flowing in the first flow passage keeps heat exchanged with the drainage water in the heat exchanger. COPYRIGHT: (C)2007,JPO&INPIT |
