Board-type heat exchanger

Abstract

A board-type heat exchanger comprises multiple heat exchange boards ( 10 ) overlapped with each other. Each of the heat exchange boards ( 10 ) comprises a fluid inlet ( 1 ) and a fluid outlet ( 2 ) that are separately located in two opposite ends of the heat exchange board in the lengthwise direction. A partition portion is disposed on the upper surface and/ or the lower surface of each of the heat exchange boards ( 10 ), so that fluid from the fluid inlet ( 1 ) is divided at the fluid inlet ( 1 ), then flows into independent fluid passage zones ( 3, 4 ) partitioned by the partition portion, gathers at the fluid outlet ( 2 ), and finally flows out of the fluid outlet ( 2 ).

What is claimed is: 
     
         1 . A plate type heat exchanger, comprising multiple heat exchange plates which are stacked together, each heat exchange plate comprising a fluid inlet and a fluid outlet located at two opposite ends respectively in a longitudinal direction of the heat exchange plate,
 wherein   a separating part is provided on a top surface and/or a bottom surface of each heat exchange plate, such that a fluid coming from the fluid inlet is split into different flows at the fluid inlet, then flows into mutually independent fluid channel regions separated by the separating part and converges at the fluid outlet, and finally flows out of the fluid outlet.   
     
     
         2 . The plate type heat exchanger as claimed in  claim 1 , wherein the separating part comprises a separating strip, which splits fluid into different flows at the fluid inlet, and a longitudinal piece connected thereto. 
     
     
         3 . The plate type heat exchanger as claimed in  claim 2 , wherein
 the longitudinal piece is arranged in one of the following three ways:   substantially parallel to the longitudinal direction of the heat exchange plate;   inclined relative to the longitudinal direction of the heat exchange plate;   having a bent or meandering shape in the longitudinal direction of the heat exchange plate.   
     
     
         4 . The plate type heat exchanger as claimed in  claim 1 , wherein
 the separating part comprises at least one separating strip extending from the fluid inlet to the vicinity of the fluid outlet.   
     
     
         5 . The plate type heat exchanger as claimed in  claim 4 , wherein
 the separating strip is arranged in one of the following three ways:   substantially parallel to the longitudinal direction of the heat exchange plate;   inclined relative to the longitudinal direction of the heat exchange plate;   having a bent or meandering shape in the longitudinal direction of the heat exchange plate.   
     
     
         6 . The plate type heat exchanger as claimed in  claim 2 , wherein
 at the fluid inlet, the separating strip is arranged to be in the angular range of −45° to 45° relative to a direction perpendicular to the longitudinal direction of the heat exchange plate, wherein the separating strip is in the shape of a straight line or bent.   
     
     
         7 . The plate type heat exchanger as claimed in  claim 1 , wherein
 the fluid inlet is at a top side at a left end of the top surface and/or bottom surface of the heat exchange plate, and the fluid outlet is at a top side or bottom side at a right end of the surface of the heat exchange plate.   
     
     
         8 . The plate type heat exchanger as claimed in  claim 1 , wherein
 a fluid distributor is provided at the fluid inlet, the fluid distributor having a middle cavity for receiving a fluid from the fluid inlet, and at least two guide parts which pass through the fluid distributor and guide fluid out of the middle cavity.   
     
     
         9 . The plate type heat exchanger as claimed in  claim 8 , wherein
 the at least two guide parts comprise any one of a through-hole, a duct and a channel passing through a main body of the fluid distributor, or any combination thereof.   
     
     
         10 . The plate type heat exchanger as claimed in  claim 9 , wherein
 the ducts comprise tubes and/or capillary tubes which introduce fluid into different fluid channel regions respectively.   
     
     
         11 . The plate type heat exchanger as claimed in  claim 9 , wherein
 the channel is formed on the heat exchange plate integrally or separately.   
     
     
         12 . The plate type heat exchanger as claimed in  claim 9 , wherein
 the fluid distributor comprises an annular main body which the guide parts pass through from the outside.   
     
     
         13 . The plate type heat exchanger as claimed in  claim 1 , wherein
 also comprising end plates which are disposed on outer sides of the heat exchange plates and used for fixing the heat exchange plates in place.   
     
     
         14 . The plate type heat exchanger as claimed in  claim 1 , wherein
 a structural pattern for distributing fluid is provided on the surface of the heat exchange plate.   
     
     
         15 . The plate type heat exchanger as claimed in  claim 14 , wherein
 multiple regularly arranged recesses or protrusions are provided on the surface.   
     
     
         16 . The plate type heat exchanger as claimed in  claim 14 , wherein
 multiple alternately arranged channels and ridges in an inverted-V-shape are provided on the surface.   
     
     
         17 . The plate type heat exchanger as claimed in  claim 4 , wherein
 at the fluid inlet, the separating strip is arranged to be in the angular range of −45° to 45° relative to a direction perpendicular to the longitudinal direction of the heat exchange plate, wherein the separating strip is in the shape of a straight line or bent.   
     
     
         18 . The plate type heat exchanger as claimed in  claim 2 , wherein
 the fluid inlet is at a top side at a left end of the top surface and/or bottom surface of the heat exchange plate, and the fluid outlet is at a top side or bottom side at a right end of the surface of the heat exchange plate.   
     
     
         19 . The plate type heat exchanger as claimed in  claim 3 , wherein
 the fluid inlet is at a top side at a left end of the top surface and/or bottom surface of the heat exchange plate, and the fluid outlet is at a top side or bottom side at a right end of the surface of the heat exchange plate.   
     
     
         20 . The plate type heat exchanger as claimed in  claim 4 , wherein
 the fluid inlet is at a top side at a left end of the top surface and/or bottom surface of the heat exchange plate, and the fluid outlet is at a top side or bottom side at a right end of the surface of the heat exchange plate.