| 摘要 |
PROBLEM TO BE SOLVED: To solve problems of a noise in a valve seat and leakage in a spool valve. SOLUTION: One end part of a hollow cylindrical valve spool 52 movable along an axial direction in a valve chest 50 for restricting or blocking a flow rate passing an expansion valve 24 between a flow-in part 34 and a flow-out part 36 is arranged to be closed by an end face wall 60, a circumferential face of the valve spool has a control hole 54 to be cooperated with a flow-in hole 42, a valve head 64 is provided in an opened end face side of the valve spool, the valve head is arranged to be coupled to the valve spool 52 via a valve stem 62, the valve head is directed to the valve seat 46, the valve seat is arranged to surround a flow-out opening 44 of a valve housing 38, and the control hole 54 is arranged to close the flow-in hole 42 already before the valve head 64 is mounted on the valve seat 46, relatively to the valve head 64 along the axial direction. COPYRIGHT: (C)2005,JPO&NCIPI
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