Welded contact safety technique
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 13, 1987
Grant Date -
N/A
app pub date -
Aug 26, 1986
filing date -
Aug 26, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A bidirectional heat transfer system including a reversing valve and a compressor has a compressor control which is subject to a welded contact failure. The system is monitored to determine when the control system has signaled for the compressor operation to stop but the compressor has, in fact, continued to operate. Under these circumstances, a safety mode of operation is commenced to keep a load on the compressor to thereby save the compressor from self-destruction. Preferably, this is done by repetitively reversing the state of the reversing valve.
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