Differential pressure valve
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United States of America Patent
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N/A
Issued Date -
Jan 10, 2008
app pub date -
Jun 14, 2007
filing date -
Jun 16, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
To provide a differential pressure valve which is capable of suppressing generation of noise when a variable displacement compressor is being operated at its minimum displacement. A hollow cylindrical protruding portion of a valve element, which is disposed in a manner surrounding a hollow cylindrical valve seat, is configured to have two windows formed at circumferentially one-sided locations as openings of a sleeve valve. As a result, the difference is generated between areas of regions of an inner peripheral surface of the hollow cylindrical protruding portion circumferentially separated by the windows, to thereby make transverse load unbalanced, so that the valve element performs opening and closing operations always in a state in which the hollow cylindrical protruding portion is transversely pressed against the hollow cylindrical valve seat. This makes it possible to suppress generation of noise due to striking of the valve seat by the valve element when it moves transversely unsteadily or wobbles in an inclined state during the opening and closing operations of the differential pressure valve.
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