• US 20120085117A1
  • Filed: 06/03/2010
  • Published: 04/12/2012
  • Est. Priority Date: 06/05/2009
  • Status: Active Grant
First Claim
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1. A trailer refrigerating apparatus for cooling an in-compartment space of a trailer, comprising:

  • a refrigerant circuit which includes an electric compressor, a condenser, an expansion mechanism, an evaporator, a hot gas introduction path connecting the electric compressor and the evaporator together, and a switching valve for controlling a flow of refrigerant in the hot gas introduction path, and which allows a refrigerating cycle for evaporating refrigerant in the evaporator to cool the in-compartment space and a defrosting cycle for introducing refrigerant into the evaporator through the hot gas introduction path to defrost the evaporator;

    a generator configured to supply power to the electric compressor;

    an engine configured to drive the generator;

    a radiator configured to dissipate heat of the engine; and

    a fan configured to, when the defrosting cycle is performed, if a pressure of the condenser is equal to or lower than a predetermined threshold, form an air flow from the radiator to the condenser.

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