A new kind of high-performance and energy saving screw water chilling unit with COP value up to 5.6 was successfully developed in Dalian Sanyo Refrigeration Co., Ltd. So, Dalian added another product which was leading in the world in technique and replaced those imported.  Aiming at the domestic market, Dalian Sanyo Refrigeration Co., Ltd. Introduced advanced technique from Japan and design and manufactured the high efficiency water chilling unit branded as Shenxiang. It used the principle of expeditiously conversing frequency and improved the energy service efficiency greatly. Due to adopt a new kind of R407C replacing freon as refrigerant, destroy to atmospheric ozone would be avoided.