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随着市场繁荣和食品工业的发展,商用小型冷冻冷藏设备的需求日益增多,它们所配用的压缩机制冷量一般均在1163～11630W(1000～10000 kcal/h)之间。目前充斥于市场的仍然是仿制美国三、四十年代的产品,如2F6.5、2F6.3、2F4.8等开启式压缩机,年产量已达5万台以上。它们具有结构简单,行程长(适用于低温)、加工方便,易于拆检,不需要专门的耐氟电机,价格便宜等优点,因而受到了生产厂和用户的欢迎,一直延续至今不衰。估计“七五”期间它们仍然是小型冷冻冷藏设备中的主要配套压缩机之一。但由于其本身的结构
With the prosperity of the market and the development of the food industry, the demand for commercial small-scale refrigeration and refrigeration equipment has been increasing. The refrigeration capacity of compressors equipped with them generally ranges from 1163 to 11630W (1000 to 10000 kcal / h). Currently flooding the market is still imitation of the United States in the thirties and forties, such as 2F6.5, 2F6.3, 2F4.8 and other open compressors, the annual output has reached 50,000 units or more. They have the advantages of simple structure, long stroke (suitable for low temperature), convenient processing, easy disassembly, no special fluorine-resistant motor and low price, which are welcomed by the manufacturers and users. It is estimated that during the “Seventh Five-Year Plan” they will still be one of the major companion compressors in small-sized refrigeration and refrigeration equipment. But because of its own structure