Large- scale wate-cooled units using screw-type refrigerantstable Acompressor, refrigeration efficiency high efficiency,stable
operation, wide aplication range,. and standard operating lifelonger than the average compressor. The use of continuous variablecapacity system. can do 33% -100% cooling capacity for continuouscontrol between, in order to achieve stable transmission out of thefunction. Continuously variable capacity system using Siemens(SIEMENS) of Germany secretary for the production ofprogrammable logic controller and remote control system to dewpoint temperature degree is the control reference. AS thecontinuous stepless capacity, not only the dew point temperatureconstant to ensure that the cooling effect, but also save a lot ofenergy consumption, it is not only with frequency control function,and can avoid the use of frequency conversion system lowfrequency refrigeration compressor cooling to the adverse effects.