1. Using environment-friendly refrigerant, the refrigeration performance is stable; 2.Temperature control precision control range is small (±1°C); 3. In the power-on standby state, the antifreeze function can be started automatically; 4. lt has dual independent temperature control mode to meet the cooling temperature requirements of laser and laser cutting lenses; 5. With water flow alarm, ultra-high temperature and ultra-low temperature and sensor fault alarm functions; 6. it has the function of compressor overcurrent and overload protection to extend the service life of the compressor.