Chiller works: chiller in the cooling water pumps work by circulating between the evaporator laser generator and compressor cooling systems continue to cycle. The heat generated by the operation of laser generator passes through the compressor of the refrigerating cycle refrigeration system eventually transferred to the air. Corresponding control parameter setting device can request control of the compressor of the refrigeration system, to ensure the cooling water temperature of said laser generator is always controlled in the most appropriate range. To ensure the stable and secure operation of the laser generator. Cooler also has a circulating water flow detection alarm, over-temperature alarm, automatic temperature adjustment and other advanced features.