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Automatic refrigerant charging apparatus

  • US 20060137366A1
  • Filed: 12/27/2004
  • Published: 06/29/2006
  • Est. Priority Date: 12/27/2004
  • Status: Active Grant
First Claim
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1. Apparatus for automatically adjusting the volume of refrigerant charge in an air conditioning system having a compressor, a condenser, an expansion device and a evaporator fluidly connected in serial refrigerant flow relationship comprising:

  • a plurality of sensors for respectively sensing a plurality of selected temperature and pressure conditions of the system;

    memory means for storing representative values for said sensed conditions;

    memory means for storing algorithms for computing charge level indicators as a function of said stored representative values;

    memory means for storing optimal charge level indicators for at least one particular system;

    comparison means for comparing said computed charge level indicators with said optimal charge level indicators to obtain a difference value;

    a source of refrigerant fluidly connected to said system by way of at least one valve; and

    valve activating means for controlling said at least one valve in response to said difference value to change the level of refrigerant in said system.

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