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从七十年代起,螺杆制冷机发展迅速,在中等冷量范围内,大有取代活塞式制冷机之势。七十年代初,苏联经技术经济分析后,作出了在一个冷量范围区间停止传统的活塞式和滑片式制冷机的生产,以螺杆式代替的决定。1969年,我国开始生产螺杆式制冷机以来,经过不断的试验、探索,至今已形成了以武汉冷冻机厂为代表的螺杆制冷机生产基地,具备了自行设计和批量生产的能力,其品种和批量基本满足了国内需要,已有二十三个省市采用,近年来还出口到泰国、坦桑尼亚等国,初步打进国际市场。1978年,一机部组织了48个单位对武汉冷冻机厂生产的单边非对称摆线圆弧型线的KA20C螺杆
Since the 1970s, screw chillers have developed rapidly, and in the mid-range cold range, they have greatly replaced piston chillers. In the early 1970s, after a technical and economic analysis, the Soviet Union made a decision to stop the production of conventional piston and vane-type chillers in a range of cold capacity, replacing it with a screw type. In 1969, after our country began to produce screw chillers, after continuous experimentation and exploration, a screw chiller production base represented by the Wuhan Refrigeration Plant has been formed. It has the capability of self-design and mass production. Bulk has basically met domestic needs and has been adopted by 23 provinces and cities. In recent years, it has also been exported to Thailand, Tanzania and other countries, and has initially entered the international market. In 1978, a machine department organized a 48-unit KA20C screw for the unilateral asymmetrical cycloid arc line produced by the Wuhan Refrigeration Plant.