Flow meter for variable displacement compressor
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United States of America Patent
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-
Feb 24, 2009
Grant Date -
Oct 4, 2007
app pub date -
Mar 23, 2007
filing date -
Mar 30, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A flow meter for a variable displacement compressor comprises a movable body operable to move by differential pressure, a magnet provided in the movable body, a magnetic sensor for detecting change of magnetic flux density of the magnet, a flow passage for refrigerant gas which is discharged from cylinder bores to flow therethrough, a sealed chamber connected perpendicularly to the flow passage and accommodating therein the movable body, an urging member for urging the movable body into the flow passage, a clearance formed between a movable body and an inner wall surface of the flow passage, a by-pass passage opened and closed as the movable body is moved in an axial direction of the movable body, and a communication passage for introducing into the sealed chamber the refrigerant gas in a downstream flow passage of the flow passage which is located downstream of the movable body.
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