Screw Type Wind-Chilling Water Chiller Unit and Refrigeration Method Thereof

Abstract

A screw type wind-chilling water chiller unit including a chassis and a compressor, a shell and tube heat exchanger, a fin-type heat exchanger and an expansion valve, and a control cubicle disposed on the chassis. The expansion valve is disposed between the compressor and the shell and tube heat exchanger. The shell and tube heat exchanger is provided with three tubes, a first tube connected to the compressor, a second tube is connected to a liquid storage can via the expansion valve and a transmission tube. A heat exchange tube in the fin-type heat exchanger is connected to a collection tube, and the liquid storage can is connected to the third tube, and a handle of a cubicle door of a control cubicle is connected to a power switch inside a power supply box, so as to improve the performance, operation stability, equipment safety of the unit.

1 . A screw type wind-chilling water chiller unit comprising: a chassis, a compressor, a shell and tube heat exchanger, a fin-type heat exchanger and an expansion valve, and a control cubicle; wherein, said compressor, said shell and tube heat exchanger, and said control cubicle are installed on said chassis, said expansion valve is disposed between said compressor and said shell and tube heat exchanger, said fin-type heat exchanger is provided at an upper portion of said unit, and said control cubicle is installed on a side of said unit; a first tube and a second tube is disposed on said shell and tube heat exchanger, said shell and tube heat exchanger is connected to said compressor via said first tube, said shell and tube heat exchanger is connected to said expansion valve through said second tube; wherein, said chassis is formed by longitudinal support frames and horizontal support frames, and vertical columns are provided on said longitudinal support frames, and it is characterized in that:
 said expansion valve is connected to a collection tube, said heat exchange tube in said fin-type heat exchanger is connected directly to said collection tube, said collection tube is connected to a liquid outlet of a liquid storage can through a dispenser head and said expansion valve in sequence, a liquid inlet of said liquid storage can is connected to a third tube of said shell and tube heat exchanger, and said third tube of said shell and tube heat exchanger is disposed at lower portion of said second tube; and a handle of a cubicle door of said control cubicle is connected to a power switch inside the power supply box, and it is installed in such a way that, when said cubicle door is opened, said power switch is disconnected, and when said cubicle door is closed, said power switch is connected.   
     
     
         2 . The screw type wind-chilling water chiller unit as claimed in  claim 1 , wherein a slant support is provided between said longitudinal support frame and said vertical column of said chassis; and outside of said longitudinal support frame is provided with hanging rings. 
     
     
         3 . The screw type wind-chilling water chiller unit as claimed in  claim 1 , wherein line grooves are provided on an upper portion of said unit, and the power wires connecting said blower are installed in said line grooves. 
     
     
         4 . The screw type wind-chilling water chiller unit as claimed in  claim 1 , wherein outside a can body of said liquid storage can is provided a transparent liquid see-through tube leading to inside said can body. 
     
     
         5 . The screw type wind-chilling water chiller unit as claimed in  claim 1 , wherein a junction box is provided in said cubicle door of said control cubicle, and backside and bottom side of said junction box are provided with openings, such that in installing said unit, said junction box covers line connection holes, with its bottom opening facing downward. 
     
     
         6 . A refrigeration method for a screw type wind-chilling water chiller unit, comprising following steps: utilizing a compressor to compress a liquid refrigerant into a gas of high temperature and high pressure, then such a gas refrigerant enters into a fin-type heat exchanger, and it is condensed into said liquid refrigerant in a heat exchange tube of said fin-type heat exchanger, and it is characterized in that: said liquid refrigerant does not flow through capillaries in said heat exchange tube, but it flows directly into a collection tube, then it exits from a liquid exit tube of said collection tube, and finally it returns to said compressor to complete a loop.