Plate heat exchanger

Abstract

A plate heat exchanger is disclosed. The plate heat exchanger of the present disclosure includes: a first plate having a wavy first heat transfer surface through which a first fluid flows; a second plate having a wavy second heat transfer surface through which a second fluid flows, the first plate and the second plate being stacked on top of each other; and ribs provided at a portion of the first heat transfer surface, wherein the wavy first heat transfer surface has alternating ridges and grooves; and the ribs project from the grooves toward the ridges in the first heat transfer surface, to come into contact with the second plate.

What is claimed is: 
     
         1 . A plate heat exchanger, comprising:
 a first plate having a wavy first heat transfer surface through which a first fluid flows;   a second plate having a wavy second heat transfer surface through which a second fluid flows, the first plate and the second plate being stacked on top of each other; and   ribs provided at a portion of the first heat transfer surface, wherein:   the wavy first heat transfer surface has alternating ridges and grooves; and   the ribs project from the grooves toward the ridges in the first heat transfer surface, to come into contact with the second plate.   
     
     
         2 . The plate heat exchanger of  claim 1 , wherein the ribs are pressed on the first plate to be formed together with the ridges. 
     
     
         3 . The plate heat exchanger of  claim 1 , wherein:
 the first heat transfer surface is elongated in an up-down direction;   the ridges and the grooves of the first heat transfer surface are elongated in a direction intersecting the up-down direction; and   the ribs further comprise a plurality of ribs which are spaced apart from each other in the up-down direction.   
     
     
         4 . The plate heat exchanger of  claim 3 , wherein the plurality of ribs further comprise:
 a first rib adjacent to a right edge of the first heat transfer surface;   a second rib adjacent to a left edge of the first heat transfer surface and disposed above the first rib; and   a third rib adjacent to the right edge of the first heat transfer surface and disposed above the second rib.   
     
     
         5 . The plate heat exchanger of  claim 4 , wherein each of the first rib, the second rib, and the third rib is elongated in a left-right direction. 
     
     
         6 . The plate heat exchanger of  claim 5 , wherein the first heat transfer surface is symmetric in the left-right direction with respect to a virtual boundary extending in the up-down direction, wherein:
 one end of the first rib is disposed on the right edge of the first heat transfer surface, and the other end thereof is disposed on the boundary;   one end of the second rib is disposed on the left edge of the first heat transfer surface, and the other end thereof is disposed on the boundary; and   one end of the third rib is disposed on the right edge of the first heat transfer surface, and the other end thereof is disposed on the boundary.   
     
     
         7 . The plate heat exchanger of  claim 5 , wherein the first heat transfer surface is symmetric in the left-right direction with respect to a virtual boundary extending in the up-down direction, wherein:
 one end of the first rib is spaced apart from the right edge of the first heat transfer surface by a first distance, and the other end thereof is disposed on the boundary;   one end of the second rib is spaced apart from the left edge of the first heat transfer surface by a second distance, and the other end thereof is disposed on the boundary; and   one end of the third rib is spaced apart from the right edge of the first heat transfer surface by a third distance, and the other end thereof is disposed on the boundary.   
     
     
         8 . The plate heat exchanger of  claim 7 , wherein the first distance, the second distance, and the third distance are equal to each other. 
     
     
         9 . The plate heat exchanger of  claim 4 , wherein:
 the first rib further comprises a plurality of first ribs which are spaced apart from each other in the left-right direction;   the second rib further comprises a plurality of second ribs which are spaced apart from each other in the left-right direction; and   the third rib further comprises a plurality of third ribs which are spaced apart from each other in the left-right direction.   
     
     
         10 . The plate heat exchanger of  claim 9 , wherein:
 the plurality of first ribs are spaced apart from each other by a fourth distance including the right edge of the first heat transfer surface;   the plurality of second ribs are spaced apart from each other by a fifth distance including the left edge of the first heat transfer surface; and   the plurality of third ribs are spaced apart from each other by a sixth distance including the right edge of the first heat transfer surface.   
     
     
         11 . The plate heat exchanger of  claim 9 , wherein the plurality of first ribs, the plurality of second ribs, and the plurality of third ribs are elongated in the left-right direction. 
     
     
         12 . The plate heat exchanger of  claim 9 , wherein the plurality of first ribs, the plurality of second ribs, and the plurality of third ribs are elongated in a direction intersecting the left-right direction. 
     
     
         13 . The plate heat exchanger of  claim 9 , wherein the first fluid is a refrigerant, and the second fluid is water.