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Refrigeration system

  • US 5,335,508 A
  • Filed: 08/19/1991
  • Issued: 08/09/1994
  • Est. Priority Date: 08/19/1991
  • Status: Expired due to Fees
First Claim
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1. A refrigeration system for a supermarket comprising:

  • a refrigerated frozen food fixture for containing frozen foods;

    a first stage scroll type compressor, a first stage evaporator coil and a first stage condenser coil connected together in a first stage closed loop refrigeration circuit, the first stage evaporator coil being adapted to maintain food in the refrigerated fixture in a frozen state;

    a second stage compressor, a second stage evaporator coil and a second stage condenser coil connected together in a second stage closed loop refrigeration circuit, the second stage condenser adapted to reject heat into the atmosphere outside the supermarket;

    a liquid heat transfer loop interconnecting the second stage evaporator and the first stage condenser to transfer heat from the first stage condenser to the second stage evaporator, the first stage condenser, first stage compressor and first stage evaporator all being located remote from the second stage evaporator;

    an interior heat exchange device and a valve operable to divert the refrigerant in the second stage closed loop refrigeration circuit from the second stage condenser to the interior heat exchange device for interior supermarket heating purposes; and

    an interior heat exchange device selectively connectable in the liquid heat transfer loop in parallel with the first stage condensor coil for interior supermarket cooling purposes.

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