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本文介绍了目前国内外正在研究开发或投入使用的环保型制冷方法．分析了各种环保型制冷方法的原理、性能及适用场合，指出了环保型制冷方法目前尚存在的问题及突破方向．
This article describes the current domestic and foreign research and development or put into use environmentally friendly refrigeration method. The principle, performance and application of various environmental protection refrigeration methods are analyzed, and the existing problems and breakthrough directions of environmental protection refrigeration methods are pointed out.