Working principle of refrigerant circulating cooling system: refrigerant liquid flows into the evaporator through capillary throttling and depressurization; Vaporization in the evaporator absorbs the heat of the cooled water in the water circuit external circulation cooling system, and turns into high-temperature mortgaged refrigerant vapor that is sucked into the compressor; After being compressed into high-temperature and high-pressure steam in the compressor, it is discharged into the condenser.

In the condenser, the refrigerant releases heat to the cooling medium, air, and after condensation, injects a capillary tube into a high-pressure, low-temperature liquid. It enters the evaporator again through the capillary tube to absorb heat and vaporize, achieving the purpose of circulating refrigeration.

Working principle of the water circuit external circulation cooling system: water exchanges energy with the refrigerant in the evaporator in the water tank; After being cooled, it flows through a water tank, filter, and water pump to a heat exchanger in the internal circulation cooling system of the waterway, where it exchanges energy with the internal circulation water to absorb its heat, and then returns to the water tank to maintain the internal circulation water within a certain temperature range.

The working principle of the water circuit internal circulation cooling system: The internal circulation water and the external circulation water exchange energy in the heat exchanger. After being cooled, they return to the water tank, pass through the filter and water pump, and pass through the laser cavity to take away the heat in the laser cavity. After cooling the laser, the temperature rises, and then flows back to the heat exchanger for energy exchange with the external circulation water.