Low charge protection vent
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United States of America Patent
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Jun 24, 2008
Grant Date -
N/A
app pub date -
Mar 12, 2003
filing date -
Mar 19, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vent is included into a scroll compressor for protecting a refrigerant system in the event of loss of charge. The vent selectively taps an entrapped compression chamber to a housing chamber which surrounds the motor. In the event of a low charge, the gas in the compression chamber will be at a high temperature, and will heat the motor when the vent opens. The vented heated gas will then actuate a temperature protection device on the motor, causing the motor to stop rotation. In further embodiments, the compression chamber which supplies the tapped fluid is the discharge port.
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