论文部分内容阅读
目前国内各螺杆制冷机厂家生产的螺杆制冷机,其能量调节装置,多数不是采用电气控制,而是采用机械式手动四通阀
At present, the domestic screw refrigerator manufacturers screw cooling machine, the energy conditioning device, the majority do not use electrical control, but the use of mechanical manual four-way valve