| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporative pressure regulation valve capable of suppressing generation of noise in starting a cycle which may have a dry operation state.SOLUTION: In a constitution including a body 3 provided with a refrigerant passage 2 inside, a valve element 4 for regulating an opening/closing degree of the refrigerant passage 2, bellows 5 applying a load to a side to close the refrigerant passage 2 to the valve element 4, a stem 6 provided in the bellows 5 and interlocked with the valve element 4, and a guide 7 in which the stem 6 is slid, the inside of the bellows 5 is applied as a sealed space free from intrusion of a refrigerant, and an O-ring 16 is mounted to apply sliding resistance to the stem 6 inside of the bellows 5. As the lubrication environment is not changed inside of the bellows, stable sliding resistance can be secured at all times, and the generation of noise can be suppressed as the sliding resistance by the O-ring 16 can be prevented from being excessive even in a dry operation state in starting a cycle. |
