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Testing the safety of domestic refrigerators with hydrocarbon refrigerants.

Author(s) : GIGIEL A.

Summary

A domestic refrigerator with a flammable refrigerant (R-600a) was tested according to the methods specified in the Standard (EN 60335-2-24:2003). Some of the test specifications were reproducible but some were specified ambiguously and gave different results depending on how the methodology was interpreted. This paper describes the reasons for the test specifications in the Standard (insofar as they are clear) and the tests that could give different results depending on how the test methods were interpreted. The method of testing the protection of the refrigeration circuit against mechanical damage did not simulate the type of damage that could be caused by defrosting the evaporator with a knife. The simulation of a leak in a protected cooling circuit was not specifically defined. The concentration of refrigerant in the compartment with a protected circuit depended on the method used to simulate a leak (either 140 or 17 500 ppm). The position and direction of a simulated leak in the compressor compartment was not specified in the Standard but had a significant effect on the concentration distribution in the compressor compartment (643 to 240 000 ppm). The sudden release of an accumulation of refrigerant in a compartment caused peaks in the concentration of refrigerant around electrical components that could not be measured by the response time of the measuring instrument specified (28 500 to 8000 ppm in 1.5 s).

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Pages: ICR07-B1-1589

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Details

  • Original title: Testing the safety of domestic refrigerators with hydrocarbon refrigerants.
  • Record ID : 2007-2126
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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