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FREEZING CYCLE USING HFC-BASED NON-AZEOTROPIC COOLING MEDIUM MIXTURE AND FREEZING APPARATUS
FREEZING CYCLE USING HFC-BASED NON-AZEOTROPIC COOLING MEDIUM MIXTURE AND FREEZING APPARATUS
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机译：使用基于HFC的非共沸冷却介质混合物和冷冻装置的冷冻循环
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摘要
PURPOSE: To provide the freezing cycle using HFC-based non-azeotropic cooling medium mixture as a cooling medium and a specific oil which is poorly compatible with the mixture, free from hazard of depletion of ozone layer and non-inflammable as a freezer oil, and capable of performing a stable operation for a long period of time. ;CONSTITUTION: This freezing cycle uses HFC-based non-azeotropic cooling medium mixture (e.g. a mixture of difluoromethane/pentafluoroethane/1,1,1,2- tetrafluoroethane of 20/40/40 in terms of weight ratio) as a cooling medium and an oil (e.g. a mineral oil or an alkylbenzenebased oil) which is poorly compatible with the mixture and separates into more than three layers when mixed with the mixture, as a freezer oil. Further, in the case where a rotary compressor is used as a compressor, an alkylbenzene-based oil is preferably used as the freezer oil because of good return to the compressor, etc.;COPYRIGHT: (C)1996,JPO
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