Heat exchanger

Abstract

A heat exchanger comprising: a corrugated plate; a base plate; a cover plate; a plurality of flow paths A and a plurality of flow pats B defined by the corrugated plate, the base plate and the cover plate disposed so as to interpose said corrugated plate therebetween; and the plurality of flow paths A and the plurality of flow paths B being alternately and adjacently arranged on both sides of the corrugated plate for exchanging heat between fluid A and fluid B via the corrugated plate by supplying fluid A through a plurality of flow paths A and fluid B through a plurality of flow paths B, wherein at least one of end portions of the plurality of flow paths is hermetically sealed by making partial cuts at the end portions of the corrugated plate and/or folding a part of the end portions of the corrugated plate, bending opposing ends of the corrugated plate so as to form respectively into a se of a gable roof, bringing at least a part of the ends of the corrugated plate into contact with each other, and brazing portions in contact, so that openings of one of the flow paths A and the flow paths B are hermetically sealed for allowing only one of the fluids to flow in/out at each end of the corrugated plate.

What is claimed is:  
     
         1 . A heat exchanger comprising: 
 a corrugated plate;    a base plate;    a cover plate;    a plurality of flow paths A and a plurality of flow paths B defined by said corrugated plate, said base plate and said cover plate disposed so as to interpose said corrugated plate therebetween; and    said plurality of flow paths A and said plurality of flow paths B being alternately and adjacently arranged on both sides of the corrugated plate for exchanging heat between fluid A and fluid B via the corrugated plate by supplying fluid A through a plurality of flow paths A and fluid B through a plurality of flow paths B,    wherein at least one of end portions of the plurality of flow paths is hermetically sealed by making partial cuts at the end portions of the corrugated plate and/or folding a part of the end portions of the corrugated plate, bending opposing ends of the corrugated plate so as to form respectively into a shape of a gable roof, bringing at least a part of the ends of the corrugated plate into contact with each other, and brazing portions in contact, so that openings of one of the flow paths A and the flow paths B are hermetically sealed for allowing only one of the fluids to flow in/out at each end of the corrugated plate.    
     
     
         2 . A heat exchanger according to  claim 1 , wherein said cover plate and/or said base plate are hermetically sealed with the end portions of said corrugated plate by making cuts at the end portions of the corrugated plate to leave margins so as to be capable of brazing either on said cover plate or on said base plate, and brazing said margins.  
     
     
         3 . A heat exchanger according to  claim 1  or  2 , wherein said corrugated plate is brazed to said base plate and/or said cover plate by the brazing material in a clad corrugated plate, and said flow paths A is completely divided off said flow paths B.  
     
     
         4 . A heat exchanger according to  claim 3 , wherein said corrugated plate comprises a cladding plate including a core material and a brazing material formed on one side or both sides of said core material.  
     
     
         5 . A heat exchanger comprising: 
 a corrugated plate;    a base plate joined on one of surfaces of said corrugated plate;    a cover plate joined on other surface of said corrugated plate;    two types of fluid flow paths A and B defined by said corrugated plate, said base plate, and said cover plate along a longitudinal direction of said corrugated plate, said two types of fluid flow paths comprising a plurality of flow paths A defined by said one of surfaces of said corrugated plate and said base plate, and said plurality of flow paths B defined by other surface of said corrugated plate and said cover plate, said plurality of flow paths A and said plurality of flow paths B being formed separately from each other;    one of upper end portions and lower end portions of said corrugated plate for forming the flow paths A, which are hermetically sealed by providing two corresponding slant surfaces, and other one of the upper end portions and lower end portions of said corrugated plate for forming the flow paths B, which are hermetically sealed by providing two corresponding slant surfaces;    inlet ports for said fluid B being provided on one end portion of the corrugated plate which is the hermetically sealed side of the flow paths A, and inlet ports for said fluid A being provided on other end portion of the corrugated plate which is the hermetically sealed side of the flow paths B;    outlet ports for said fluid A and for said fluid B respectively being provided on opposite sides of said inlet ports for fluid A and fluid B,    wherein heat is exchanged between fluid A and fluid B via the corrugated plate by supplying fluid A into the plurality of said flow paths A and supplying fluid B into the plurality of said flow paths B respectively from said inlet ports toward said outlet ports.    
     
     
         6 . A heat exchanger according to  claim 5 , wherein said flow paths A and said flow paths B are alternately disposed along a lateral direction of said corrugated plate, and an extent of turbulent flow of fluid that is generated in vicinity of said inlet ports is alleviated by a shape of said end portions hermetically sealed by providing said two corresponding slant surfaces.  
     
     
         7 . A heat exchanger comprising: 
 a corrugated plate;    a base plate joined on one of surfaces of said corrugated plate;    a cover plate joined on other surface of said corrugated plate;    two types of fluid flow paths A and B defined by said corrugated plate, said base plate, and said cover plate along a longitudinal direction of said corrugated plate, said two types of flow paths comprising a plurality of flow paths A defined by said one of surfaces of said corrugated plate and said base plate, and said plurality of flow paths B defined by other surface of said corrugated plate and said cover plate, said plurality of flow paths A and said plurality of flow paths B being formed separately from each other;    upper end portion and lower end portion of said corrugated plate forming the flow paths A or B, which are hermetically sealed by providing two corresponding slant surfaces;    inlet ports provided on said base plate or said cover plate forming said flow paths A or said flow paths B, upper end portions and lower end portions of which are hermetically sealed, and outlet ports provided opposite side of said inlet ports;    inlet ports provided on one end of said flow paths A or said flow paths B, upper end portions and lower end portions of which are not hermetically sealed, and outlet ports provided on opposite side of said inlet ports,    wherein heat is exchanged between fluid A and fluid B via the corrugated plate by supplying fluid A into the plurality of said flow paths A and supplying fluid B into the plurality of said flow paths B respectively from said inlet ports thus constructed toward said outlet ports.    
     
     
         8 . A heat exchanger according to  claim 7 , wherein said fluid A and said fluid B flow opposite directions.  
     
     
         9 . A heat exchanger comprising: 
 a corrugated plate;    a base plate joined on one of surfaces of said corrugated plate;    a cover plate joined on other surface of said corrugated plate;    two types of fluid flow paths A and B defined by said corrugated plate, said base plate, and said cover plate along a longitudinal direction of said corrugated plate, said two types of fluid flow paths comprising a plurality of flow paths A defined by said one of surfaces of said corrugated plate and said base plate, and said plurality of flow paths B defined by other surface of said corrugated plate and said cover plate, said plurality of flow paths A and said plurality of flow paths B being formed separately from each other;    one end portion of the upper end portion or the lower end portion of said corrugated plate forming the flow path A and other end portion of the upper end portion or the lower end portion of said corrugated plate forming the flow path B, which are hermetically sealed by providing two corresponding slat surfaces, respectively;    outlet ports for said fluid B being provided on one end portion of the corrugated plate which is the hermetically sealed side of the flow paths A, and outlet ports for said fluid A being provided on the other end portion of the corrugated plate which is the hermetically scaled side of the flow paths B;    inlet ports for said fluid A or inlet ports for said fluid B being provided on said base plate or said cover plate forming said flow paths A and said flow paths B,    wherein heat is exchanged between fluid A and fluid B via the corrugated plate by supplying fluid A into the plurality of said flow paths A and supplying fluid B into the plurality of said flow paths B respectively from thus constructed said inlet ports toward said outlet ports.    
     
     
         10 . A heat exchanger according to any one of  claims 5  to  9 , wherein the end portions with said two corresponding slant surfaces provided are hermetically sealed by brazing.  
     
     
         11 . A heat exchanger according to  claim 10 , wherein said end portions hermetically sealed by providing said two corresponding slant surfaces are provided with vertical surfaces as margins for brazing, and hermetically sealed by brazing said vertical surfaces.  
     
     
         12 . A heat exchanger according to any one of  claims 5  to  9 , wherein said corrugated plate is formed of cladding material comprising a core material and brazing material formed on one or both surfaces of said core material, and said corrugated plate and said base plate, as well as/or said corrugated plate and said cover plate are respectively joined by brazing with said brazing material of said corrugated plate.  
     
     
         13 . A heat exchanger according to  claim 12 , wherein said corrugated plate and said base plate, and said corrugated plate and said cover plate, which are brazed and joined, are further joined by adhesive agent or sealing material.  
     
     
         14 . A heat exchanger according to any one of  claims 5  to  9 , wherein said cover plate and/or said base plate are hermetically sealed with the end portions of said corrugated plate by making cuts at the end portions of the corrugated plate to leave margins so as to be capable of brazing either with said cover plate or with said base plate, and brazing said margins.  
     
     
         15 . A heat exchanger according to  claim 14 , wherein said corrugated plate comprises a cladding material including a core material and brazing material formed on one or both surfaces of said core material.  
     
     
         16 . A heat exchanger according to  claim 15 , wherein said corrugated plate includes margins for brazing.  
     
     
         17 . A heat exchanger according to  claim 16 , wherein said corrugated plate and said base plate, and said corrugated plate and said cover plate, which are brazed and joined, are further joined by adhesive agent or sealing material.