| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve device for an vehicular air conditioner preventing sudden rise of delivery pressure with a simple structure even if CO<SB>2</SB>refrigerant is used to protect a refrigeration cycle. SOLUTION: This device is provided with a pressure sensitive valve 48 provided in a first passage 2 communicating with a delivery chamber 18 of a compressor 4 and operating upon sensing rise of delivery pressure of CO<SB>2</SB>refrigerant and a shut-off valve 40 provided in an second passage 20 communicating with a suction chamber 16 and moved to a position throttling the second passage with mechanically interlocking with operation of the pressure sensitive valve when pressure in the first passage gets high. COPYRIGHT: (C)2007,JPO&INPIT
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