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Refrigerant overpressure release recovery system with compressor auto shutdown

  • US 5,408,840 A
  • Filed: 04/05/1994
  • Issued: 04/25/1995
  • Est. Priority Date: 04/05/1994
  • Status: Expired due to Fees
First Claim
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1. A new and improved refrigerant recovery system for capturing refrigerant released during a refrigerant system overpressure event comprising:

  • a refrigerant system interface means having a threadedly engaging portion and a body portion wherein said threadedly engaging portion sealably engages a threaded portion of a venting port of a high pressure release valve;

    a check valve formed of a housing containing a spring member, a ball, and a seat member in series disposition, the check valve coupled to the body portion of the refrigerant system interface means for permitting relatively free passage of liquid and gaseous refrigerant therethrough in one direction from the venting port of the high pressure release valve and precluding such passage in an opposite direction;

    a steel recovery tank capable of holding for an indefinite time refrigerant therein in a pressurized condition and having a quick-disconnect refrigerant access valve extended therefrom for draining refrigerant;

    a tubular conduit coupled between the check valve and recovery tank for conveying refrigerant from the check valve to the recovery tank; and

    an electrical circuit for monitoring and controlling pressurization of the recovery tank with the circuit further comprising;

    an electrical power source for supplying a flow of electrical current;

    indicator means interconnected with the power source for providing a visual indication of failure from an overpressure event in the recovery tank;

    a compressor electromagnetic clutch interconnected with the power source;

    a normally open high pressure indicator switch engaging the recovery tank and serially interconnected with the indicator means and the power source; and

    a normally closed refrigeration disabling switch engaging the recovery tank and serially interconnected with the compressor electromagnetic clutch and the power source.

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