| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal heat exchanger 5 which reduces the number of part items and has a simple configuration. SOLUTION: An air conditioner for a vehicle is provided with: refrigeration cycle in which refrigerant discharged from a compressor 1 returns into the compressor 1 through a condenser 2, an expansion valve 3, and an evaporator 4; and the internal heat exchanger 5 arranged on the halfway of the refrigeration cycle to exchange heat between high temperature and high pressure refrigerant flowing in from a condenser 2 side, and low temperature and low pressure refrigerant flowing in from an evaporator 4 side. The expansion valve 3 is integrated with the evaporator 4. The internal heat exchanger 5 is provided with: a high temperature high pressure flow passage connected with the expansion valve 3 to let the high temperature high pressure refrigerant from the condenser 2 side flow; and a low temperature low pressure flow passage in which the low temperature low pressure refrigerant from the evaporator 4 side flows, and heat is exchanged between the high temperature high pressure refrigerant flowing in the high temperature high pressure flow passage and the low temperature low pressure refrigerant. COPYRIGHT: (C)2004,JPO
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