The refrigeration efficiency of the chiller will be greatly improved in the mode of joining the economy. In particular, large screw chiller and low temperature chiller. The cooling system with the economy is simple and easy to operate. The paper introduces the principle of the system of the cold water machine:
The system uses a heat exchanger (too cold exchanger) to realize the liquid refrigerant is too cold. By injecting a part of the refrigerant into the cooler through the expansion of the condenser, and after the throttle refrigerant in the evaporator heat absorption, so as to achieve the effect of cooling. This section of superheated steam enters the compressor through the economic interface and the gas mixture from the evaporator has been partially compressed.
The cooling liquid of the system of the cold water machine of the cooling economy is under the condensation pressure, so it doesn't need any special properties with the connecting pipe of the evaporator. This system is suitable for general use.
Explosion proof grade requirements for compressor connection of explosion - proof cold water unit, explosion - proof cold water machine is used in special occasions.