本文针对超市陈列柜制冷系统负荷变化大的特点,提出了采用回气压力浮动来控制压缩机的运行,在保证食品储藏温度不变的情况下达到增效节能的目的。本文介绍了该方法的控制策略和浮动条件,比较分析其特点,指出了其增效节能优势,并介绍了蒸发压力浮动控制对制冷系统带来的其他好处。 In this paper, according to the large load change of refrigeration system in supermarket, countermeasures to control the operation of compressor with back pressure fluctuation are put forward, which can achieve the goal of energy efficiency and energy conservation under the condition of keeping the food storage temperature unchanged. This paper introduces the control strategy and floating conditions of the method, compares and analyzes its characteristics, points out the advantages of its efficiency and energy saving, and introduces other benefits brought by the evaporation pressure floating control to the refrigeration system.