The JRG series constant temperature circulating chiller is a series of products independently developed by Jinruiguang Electromechanical Company. This product is mainly used for instruments, equipment, etc. that use circulating water (or other liquid cooling media) for cooling. The machine is mainly composed of a compression refrigeration system, a water circulation system, and a temperature control system. The principle is compression refrigeration, which uses compressors and other components to form a refrigeration system. The generated cooling capacity is input into the water circulation system, and the heat is discharged into the air; The water circulation system brings cooling capacity to the user's instrument equipment, cools the related equipment, and the automatic control system completes the precision control of water temperature and self-protection of air-cooled chillers.