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Two stage reciprocating compressors and associated HVAC system and methods

  • US 6,389,823 B1
  • Filed: 06/29/2000
  • Issued: 05/21/2002
  • Est. Priority Date: 08/14/1997
  • Status: Expired due to Term
First Claim
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1. A system for cooling a space comprising:

  • a two stage compressor that operates either at a first fixed maximum load or at a reduced second fixed load;

    an evaporator, a condenser, and an expansion device in a refrigeration loop with said compressor;

    a two stage evaporator blower that operates either at a first fixed maximum load or at a second reduced fixed load; and

    a control system interconnected with the compressor and blower and designed to operate the compressor and blower at the respective first stages when the cooling requirement exceeds a preselected value and at the respective second stages when the cooling requirements fall below that preselected value.

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