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Controlling multiple variable speed compressors

  • US 5,797,729 A
  • Filed: 02/16/1996
  • Issued: 08/25/1998
  • Est. Priority Date: 02/16/1996
  • Status: Expired due to Fees
First Claim
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1. A refrigeration system comprising a plurality of variable speed compressors and a controller, the controller being configured to energize a subset of the variable speed compressors, the subset being determined by comparing a capacity requirement of the refrigeration system against a stored set point table stored in the controller, the stored set point table defining a plurality of ranges of required rack capacity over which defined subsets of the plurality of variable speed compressors provide a greater energy efficiency ratio than any other subsets when each energized variable speed compressor operates at a speed substantially the same as the other energized variable speed compressors, the speed being below a maximum speed of the compressors.

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