为了探索通过改进气阀提高制冷活塞式压缩机经济性的途径,以便为老产品的改造及新产品的研制打下一个基础,我校承担了机械工业部的《提高我国中小型制冷压缩机热力性能》 In order to explore ways to improve the economy of refrigeration piston compressor by improving the gas valve in order to lay a foundation for the transformation of old products and the development of new products, our school assumed the responsibility of “improving the thermal performance of small and medium sized refrigeration compressors ”