| 摘要 |
PROBLEM TO BE SOLVED: To secure heating capacity even when outside air has an extremely low temperature, in an air conditioner for a vehicle performing heating by a heat pump cycle. SOLUTION: This air conditioner includes a compressor 21, an outdoor heat exchanger 22 outside a cabin, and an evaporator 13 in an air conditioning casing to switch any one of a cooling mode, a first heating mode and a second heating mode of a coolant circuit by switching means 27, 29 and 31. The coolant circuit of the heat pump cycle making coolant radiate heat by the heat radiator 14 and making the coolant absorb heat by the outdoor heat exchanger 22 is constituted during the first heating mode. The coolant circuit of a hot gas cycle for making the coolant flowing out of the heat radiator 14 flow into the compressor 21 by making the coolant bypass the outdoor heat exchanger 22 and the evaporator 13 after making high temperature vapor phase coolant after discharged from the compressor 21 radiate heat by the heat radiator 14. COPYRIGHT: (C)2011,JPO&INPIT
|
