Volume ratio control system for compressor

A volume ratio control system for a compressor includes a chamber formed within a housing of the compressor, wherein the chamber is in fluid communication with a high pressure side of the compressor; a piston disposed within the chamber, wherein the piston includes a cavity in fluid communication with a low pressure side of the compressor; and a biasing device disposed within the chamber and configured to enable the piston to move in response to a pressure difference between the low pressure side of the compressor and the high pressure side of the compressor falling below a threshold. 一种用于压缩机的容积比控制系统包含：形成于所述压缩机的外壳内的腔室，其中所述腔室与所述压缩机的高压侧流体连通；设置在所述腔室内的活塞，其中所述活塞包含与所述压缩机的低压侧流体连通的空腔；以及偏置装置，其设置在所述腔室内并且被配置成响应于所述压缩机的所述低压侧与所述压缩机的所述高压侧之间的压差下降到阈值以下而使所述活塞能够移动。