Method and controller for determining low refrigerant charge

Method and controller for determining low refrigerant charge

  • CN 101,166,941 A
  • Filed: 12/21/2005
  • Published: 04/23/2008
  • Est. Priority Date: 01/05/2005
  • Status: Active Application
First Claim
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1. refrigerant system, it comprises:

  • Be used for compressed refrigerant and refrigerant downstream is transported to the compressor of condenser, cold-producing medium flows to expansion gear from described condenser, and flows to evaporimeter from described expansion gear, and cold-producing medium flow back into described compressor from described evaporimeter;

    WithBe used to control the controller of described refrigerant system, this controller provides a plurality of system variables by a plurality of sensors, and this controller comes the calculated mass flow rate by at least two kinds of methods based on system variable in operation, and the described mass flowrate that this controller calculates described two kinds of methods in operation is compared to each other, if and the difference of the result of calculation of described two mass flowrates is then indicated the low charging amount of the cold-producing medium in described refrigerant system above scheduled volume.

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