1　用单机近路对循环气实行减量调节这种调节方式的气体回流路线最短、速度快 ,实际上就是气体从本机出口阀门到进口阀门。它的优点是 :气体不经过其它任何设备 ,相对功损、冷损最小。但长时间大气量的回调会出现循环机缸体温度升高 ,运行难度增大 ,对进、出口阀门保护不利 ,双 1 with a single close to the implementation of reduction of circulating gas regulation This regulation of the gas return route is the shortest, fast, in fact, the gas from the local outlet valve to the inlet valve. Its advantages are: gas without any other equipment, the relative power loss, minimum loss. However, a long time the amount of atmospheric volume will appear cycle machine cylinder temperature increases, the difficulty of increasing the import and export protection valve adverse, double