1.Semi-hermetic screw refrigeration compressorThe compressor adopts advanced bilateral asymmetric full arc and its envelope rotor profile, making the compressor highly efficient. The energy adjustment device in the compressor allows a single compressor to adjust the energy steplessly from 30% to 100%. The compressor can start with minimum load. 2.Intellectualized PLC controller with touch-screenPLC intelligent programming controller can automatically start, stop and adjust energy according to the water chiller's outlet water temperature or remote signal, realizing fully automatic control of the operation process.At the same time, the water chiller is equipped with protection devices such as low suction pressure, high exhaust pressure, ultra-low temperature of refrigerant water, water cutoff, motor overload, motor overheating, power failure, ultra-high exhaust temperature, and low oil pressure difference. 3. The shell and tube condenser and evaporator of the water chiller adopt high-efficiency heat exchange tubes, which are small in size, light in weight and high in heat exchange efficiency. 4. The entire water chiller runs smoothly, has small vibration, is safe and reliable.