一、前言随着我国工业、农业、商业、旅游业的发展及人民生活的提高,各方面对制冷、空调设备的需求量就越来越大。以1982年为例,我国制冷机年产13万台套,并以年产量8%的速度增长着,相信这个比例还会继续增加。据1982年统计,若不包括电冰箱在内,其它制冷设备年耗电量为100.3亿度,以全国年发电量为3000亿度计,约占全国 I. Introduction With the development of industry, agriculture, commerce and tourism in our country and the improvement of people’s life, the demand for refrigeration and air-conditioning equipment in all fields is growing. Taking 1982 as an example, China’s annual output of refrigerators is 130,000 sets, and the annual output of 8% growth rate, I believe this ratio will continue to increase. According to the statistics of 1982, if it does not include refrigerators, the annual electricity consumption of other refrigeration equipment is 10.03 billion kilowatt-hours, and the annual electricity generation in the country is 300 billion kilowatt-hours, accounting for about the whole country