Plate-fin heat exchanger core and fin structure thereof

Abstract

The present invention provides a plate-fin heat exchanger core and a fin structure thereof. The plate-fin heat exchanger core includes: a plurality of partition plates and a fin, where the fin is supported and fixed between two adjacent partition plates; the two adjacent partition plates are sealed to form a fluid channel unit; the fluid channel unit forms a plurality of heat exchange channels for a medium to flow between the adjacent partition plates; the fin is provided with a plurality of dimples/protrusions; the dimple/protrusion is provided with a perforated hole to form a perforated dimple/protrusion. The fin increases the heat exchange area, and the dimple/protrusion structure improves the pressure-bearing capacity of the plate-fin structure and improves fluid turbulence, thinning a flow boundary layer and a hot boundary layer.

What is claimed is: 
     
         1 . A fin structure, comprising:
 a fin having a plurality of dimples and a plurality of protrusions, wherein one or more of the plurality of dimples and/or one or more of the plurality of protrusions is provided with a perforated hole to form a perforated protrusion and/or a perforated dimple.   
     
     
         2 . The fin structure according to  claim 1 , wherein the perforated hole is located at a center of the one or more perforated protrusion and/or the one or more perforated dimple. 
     
     
         3 . The fin structure according to  claim 1 , wherein the perforated hole has an offset from the center of the one or more perforated protrusion and/or the one or more perforated dimple. 
     
     
         4 . The fin structure according to  claim 3 , wherein an offset hole on the perforated protrusion is located on an inflowing leeward side and an offset hole on the perforated dimple is located on an inflowing side. 
     
     
         5 . The fin structure according to  claim 1 , wherein the perforated hole is circular. 
     
     
         6 . The fin structure according to  claim 1 , wherein the fin is a straight, wavy or offset strip fin. 
     
     
         7 . A plate-fin heat exchanger core, comprising:
 a plurality of partition plates; and   the fin according to  claim 1 , wherein:
 the fin is supported and fixed between two adjacent partition plates; 
 the two adjacent partition plates are sealed to form a fluid channel unit; and 
 the fluid channel unit forms a plurality of heat exchange channels for a medium to flow between the adjacent partition plates. 
   
     
     
         8 . The plate-fin heat exchanger core according to  claim 7 , comprising a plurality of fluid channel units stacked and fixed together. 
     
     
         9 . The plate-fin heat exchanger core according to  claim 8 , wherein adjacent fluid channel units share one partition plate. 
     
     
         10 . The plate-fin heat exchanger core according to  claim 9 , wherein the perforated hole is located at a center of the one or more perforated protrusion and/or the one or more perforated dimple. 
     
     
         11 . The plate-fin heat exchanger core according to  claim 7 , wherein the perforated hole has an offset from the center of the one or more perforated protrusion and/or the one or more perforated dimple. 
     
     
         12 . The plate-fin heat exchanger core according to  claim 11 , wherein an offset hole on the perforated protrusion is located on an inflowing leeward side and an offset hole on the perforated dimple is located on an inflowing side. 
     
     
         13 . The plate-fin heat exchanger core according to  claim 12 , comprising a plurality of fluid channel units stacked and fixed together. 
     
     
         14 . The plate-fin heat exchanger core according to  claim 13 , wherein adjacent fluid channel units share one partition plate. 
     
     
         15 . The plate-fin heat exchanger core according to  claim 7 , wherein the perforated hole is circular. 
     
     
         16 . The plate-fin heat exchanger core according to  claim 7 , wherein:
 a plurality of perforated protrusions and a plurality of perforated dimples are staggered on both sides in the heat exchange channel; and   the two sides of the heat exchange channel have a perforated protrusion structure, a perforated dimple structure, or a perforated dimple/protrusion mixed structure.   
     
     
         17 . A plate-fin heat exchanger core, comprising:
 a plurality of partition plates; and   a plurality of fluid channel units stacked and fixed together, at least one fluid channel unit comprising:
 a fin according to  claim 1 , wherein:
 the fin is supported and fixed between two adjacent partition plates; 
 the two adjacent partition plates are sealed to form the fluid channel unit; and 
 the fluid channel unit forms a plurality of heat exchange channels for a medium to flow between the adjacent partition plates. 
 
   wherein adjacent fluid channel units share one partition plate, and   wherein a plurality of the perforated protrusions and/or a plurality of the perforated dimples are staggered on both sides in at least one of the heat exchange channels of at least one fluid channel unit.   
     
     
         18 . The plate-fin heat exchanger core according to  claim 17 , wherein the perforated hole is located at a center of the one or more perforated protrusion and/or the one or more perforated dimple. 
     
     
         19 . The plate-fin heat exchanger core according to  claim 17 , wherein the perforated hole has an offset from the center of the one or more perforated protrusion and/or the one or more perforated dimple. 
     
     
         20 . The plate-fin heat exchanger core according to  claim 17 , wherein the perforated hole is circular.