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System and method for retrofitting a refrigeration system from HCFC to HFC refrigerant

  • US 10,330,364 B2
  • Filed: 06/19/2015
  • Issued: 06/25/2019
  • Est. Priority Date: 06/26/2014
  • Status: Active Grant
First Claim
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1. A method for retrofitting a refrigeration system from an HCFC refrigerant compatible with a mineral oil or alkyl benzene lubricant to an HFC refrigerant compatible with a polyol ester lubricant, comprising:

  • evacuating the HCFC from the refrigeration system, leaving at least a portion of the mineral oil or alkyl benzene lubricant; and

    charging the refrigeration system with a composition comprising the HFC refrigerant mixed with a polyol ester lubricant,thereby resulting in a refrigeration system charged with the HFC and a mixed lubricant comprising both the mineral oil or alkyl benzene lubricant and the polyol ester lubricant.

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