R500制冷剂的起源至今还很不清楚。有时说它是杜帮(Du Pont)公司首制的,有时说它是由Carrier公司生产的。然而可以肯定的是:开利亚(Carrier)公司是第一家以《Garrenet》名称使用过它的客户,而杜帮公司则是生产者。该共沸混合物已使用了35年,有很多优点,但遗憾的是还有许多制冷工程人员不了解它。长期以来,它一直被R22的成功所遮盖,但是通过批发商的努力,近日R500制冷剂有发展的趋势。 The origin of R500 refrigerant is still unclear. Sometimes it is said to be the first of its kind made by Du Pont and sometimes it is made by Carrier. What is certain, however, is that Carrier was the first to use it under the name of “Garrenet,” while DuPont is a producer. The azeotrope has been in use for 35 years and has many advantages, but unfortunately many other refrigeration engineers do not understand it. For a long time, it has been covered by the success of R22, but through the efforts of wholesalers, R500 refrigerants have a tendency of development recently.