Cooling system with tandem compressors and electronic expansion valve control
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United States of America Patent
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Nov 11, 2014
Issued Date -
N/A
app pub date -
Apr 13, 2012
filing date -
Apr 19, 2011
priority date (Note) -
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Abstract
A cooling system has a tandem compressor, a condenser, an electronic expansion valve and an evaporator arranged in a direct expansion cooling circuit. The tandem compressor includes a variable capacity compressor and a fixed capacity compressor. A controller controls the electronic expansion valve and selects which of a plurality of superheat control modes to use in operating the electronic expansion valve based on control parameters and a current operating status of each of the variable capacity compressor and fixed capacity compressor of the tandem compressor.
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