In the industrial chiller system, we know that the refrigeration compressor screw chiller mainly adopts two kinds of brands, one is Taiwan Hanbell screw compressor, a German Bitzer compressor. According to the demand of the temperature and application of screw type chiller in different industries, the enterprise will set the economic device to the screw type chiller.

      Low temperature screw chiller refrigeration system with economizer has a throttle valve and two throttle two forms for a throttle system, from the liquid storage tank of liquid refrigerant is divided into two parts, a main road running through the coil in the economizer in heat and cold, and then through the throttle valve throttle valve in the evaporator, the refrigeration; another way through the throttle valve pressure, into the heat in the economizer and the flash gas through the middle air screw compressor on the body, into the element volume is in the initial stage of compression, and the mixed gas from the evaporator continue to be compressed.

      The liquid refrigerant refrigeration system of screw chillers two throttling from the liquid reservoir, through the throttle valve to the economizer, the upper the flash gas compressor through the air into the mouth of the element volume in the compression stage, and the original gas continue to be compressed; the lower part of the liquid through the throttle valve throttle valve second in the evaporator of refrigeration. The liquid refrigerant into the evaporator after two times and two times before throttling throttling and the air inlet into the gas at the same temperature. Whether it is a throttle form, or the two throttle form, is to allow the refrigerant into the evaporator is too cold, and ultimately increase the amount of cooling. At the same time the air element volume increase gas quality, compression work have increased, but the increase of efficiency than the cooling capacity increases slowly, so the refrigeration coefficient of the chiller has improved, energy saving effect.