Detection and correction of reverse operation of a compressor in a refrigeration system

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United States of America Patent

PATENT NO 8225621
APP PUB NO 20090292395A1
SERIAL NO

12454821

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Abstract

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A method and system for detecting and correcting unintended reverse or backward operation of an electric motor driven scroll compressor of a refrigeration system is characterized by monitoring the pressure at a suction side of the compressor during operation of the refrigeration and determining whether the pressure, after a first time interval following startup of the compressor, exceeds and remains in excess of a predetermined upper pressure limit for at least a second time interval. If it does, the compressor is turned off for a third time interval and is then restarted. The foregoing is repeated and if the compressor is turned off a selected number of times because of successive occurrences of high suction side pressures during operation of the refrigeration system in a chilling cycle, an error indication is generated and the refrigeration system is shut down.

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Patent Owner(s)

Patent OwnerAddress
MARMON FOODSERVICE TECHNOLOGIES INC101 BROADWAY STREET WEST SUITE 200 OSSEO MN 55369

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
DiFatta, Vincenzo Wood Dale, US 17 44
Knight, Christopher J Lisle, US 2 7
Li, Wali Naperville, US 1 3
Popov, Nikolay V Warrenville, US 8 31
Prochaska,, Sr Daniel D Elgin, US 2 6

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