Plate type heat exchanger

Abstract

In a plate type heat exchanger, a radius of curvature R1 of the protrusions formed in first plates is greater than a radius of curvature R2 of the depressions formed in the first plates to provide a plurality of asymmetrical flow paths.

What is claimed is: 
     
         1 . A plate type heat exchanger comprising:
 a plate package in which a plurality of heat exchange plates is stacked to form a flow path, through which fluid flows;   an end plate coupled to an outside of the plate package; and   a socket connected to the plate package by passing through the end plate,   wherein the plurality of heat exchange plates includes:   a plurality of first plates in which a plurality of protrusions protruding upward from a plate body and a plurality of depressions recessed downward from the plate body are alternately arranged; and   a plurality of second plates having a shape symmetrical to that of the first plates in a vertical direction,   wherein the plurality of first plates and the plurality of second plates are alternately stacked one by one in the vertical direction,   wherein the protrusions of the first plates are coupled to depressions of the second plates,   wherein the depressions of the first plates are coupled to protrusions of the second plates, and   wherein a radius of curvature R 1  of the protrusions formed in the first plates is greater than a radius of curvature R 2  of the depressions formed in the first plates to provide a plurality of asymmetrical flow paths.   
     
     
         2 . The plate type heat exchanger of  claim 1 , wherein a cross-sectional area of the flow paths formed by the protrusions of the first plates and the depressions of the second plates is greater than that of the flow paths formed by the depressions of the first plates and the protrusions of the second plates. 
     
     
         3 . The plate type heat exchanger of  claim 1 ,
 wherein water flows in the flow paths formed by the protrusions of the first plates and the depressions of the second plates, and   wherein refrigerant flows in the flow paths formed by the depressions of the first plates and the protrusions of the second plates, such that heat is exchanged.   
     
     
         4 . The plate type heat exchanger of  claim 3 , wherein a cross-sectional area of the flow paths, through which the water flows, is 1.1 times to 1.15 times that of the flow paths, through which the refrigerant flows. 
     
     
         5 . The plate type heat exchanger of  claim 1 , wherein the plurality of protrusions formed on the first plates are spaced apart at a certain interval and protrude at the same height. 
     
     
         6 . The plate type heat exchanger of  claim 1 , wherein the plurality of depressions formed in the first plates are spaced apart at a certain interval and are recessed at the same depth. 
     
     
         7 . A plate type heat exchanger comprising:
 a plate package in which a plurality of heat exchange plates is stacked to form a flow path, through which fluid flows;   an end plate coupled to an outside of the plate package; and   a socket connected to the plate package by passing through the end plate,   wherein the plurality of heat exchange plates includes:   a plurality of first plates in which a plurality of protrusions protruding upward from a plate body, a plurality of depressions recessed downward from the plate body and inclined portions connecting the protrusions and the depressions are alternately arranged; and   a plurality of second plates having a shape symmetrical to that of the first plates in a vertical direction,   wherein the plurality of first plates and the plurality of second plates are alternately stacked one by one in the vertical direction,   wherein the protrusions of the first plates are coupled to depressions of the second plates,   wherein the depressions of the first plates are coupled to protrusions of the second plates, and   wherein a width L 1  of the protrusions formed in the first plates is greater than a width L 2  of the depressions formed in the first plates to provide a plurality of asymmetrical flow paths.   
     
     
         8 . The plate type heat exchanger of  claim 7 , wherein a cross-sectional area of the flow paths formed by the protrusions of the first plates and the depressions of the second plates is greater than that of the flow paths formed by the depressions of the first plates and the protrusions of the second plates. 
     
     
         9 . The plate type heat exchanger of  claim 7 ,
 wherein water flows in the flow paths formed by the protrusions of the first plates and the depressions of the second plates, and   wherein refrigerant flows in the flow paths formed by the depressions of the first plates and the protrusions of the second plates, such that heat is exchanged.   
     
     
         10 . The plate type heat exchanger of  claim 9 , wherein a cross-sectional area of the flow paths, through which the water flows, is 1.1 times to 1.15 times that of the flow paths, through which the refrigerant flows. 
     
     
         11 . The plate type heat exchanger of  claim 7 , wherein the width L 2  of the depressions formed in the first plates is 0.3 times to 0.8 times the width L 1  of the protrusions formed in the first plates. 
     
     
         12 . The plate type heat exchanger of  claim 7 , wherein an angle between the inclined portions and the depressions is in a range from 50 degrees to 80 degrees. 
     
     
         13 . The plate type heat exchanger of  claim 7 , wherein the inclined portions include:
 a first inclined portion inclined downward from one end of the protrusion to an end of an adjacent first depression; and   a second inclined portion inclined downward from the other end of the protrusion to an end of an adjacent second depression.   
     
     
         14 . The plate type heat exchanger of  claim 13 , wherein the first inclined portion and the second inclined portion have a bilateral symmetrical shape. 
     
     
         15 . The plate type heat exchanger of  claim 13 , wherein the first inclined portion, the protrusion and the second inclined portion have an equilateral trapezoidal shape. 
     
     
         16 . The plate type heat exchanger of  claim 7 , wherein the plurality of protrusions formed on the first plates are spaced apart at a certain interval and protrude at the same height. 
     
     
         17 . The plate type heat exchanger of  claim 7 , wherein the plurality of depressions formed in the first plates are spaced apart at a certain interval and are recessed at the same depth.