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近年来,由于 CFCS 问题的正式公认,由绿色环保制冷剂取代传统制冷剂,寻求安全、高效、环保的替代制冷剂成为制冷界一项紧迫而重要的任务。在冷藏冷冻半封闭活塞式制冷压缩机上,使用新制冷剂 R404A 的机组已经得到广泛的应用。我国由于成本和施工工艺的限制,新制冷剂的产品还没有广泛推广,但对新制冷剂产品的需求已经呼声四起。本文对活塞式制冷压缩机在 R404A 替代 R22过程中需要关注的润滑油的选择,零部件的改进,以及制造工艺和制冷系统的改进等进行了分析,为使用环保型制冷剂R404A 替换 R22的应用打下基础。
In recent years, due to the formal recognition of the CFCS issue, replacing traditional refrigerants with green refrigerants and seeking safe, efficient and environmentally friendly alternative refrigerants has become an urgent and important task in the refrigeration industry. In refrigerated frozen semi-closed piston refrigeration compressors, the use of new refrigerant R404A unit has been widely used. Due to the limitation of cost and construction technology in our country, the products of new refrigerants have not been widely popularized, but the demand of new refrigerant products has been voiced. This article analyzes the choice of lubricating oil, improvement of components and parts, improvement of manufacturing process and refrigeration system, etc. in R404A instead of R22 in order to replace R22 with environmentally friendly refrigerant R404A lay the foundation.