Brazed channel plate

Abstract

A brazed channel plate includes a plurality of brazing sheets stacked on top of one another and bonded to each other with a channel formed therebetween, in which occurrence of clogging of the channel due to molten brazing material is suppressed. At least one of the outermost brazing sheets in the stacking direction has a brazing material escape aperture extending to a bonding surface facing the channel space.

1 . A brazed channel plate comprising:
 a plurality of brazing sheets stacked on top of one another and bonded to each other, each of the plurality of brazing sheets including a sheet core made of metal and a brazing material deposited on at least one of top and bottom surfaces of the sheet core, the plurality of brazing sheets providing a channel therebetween, at least one of a pair of outermost brazing sheets in a stacking direction having a brazing material escape aperture penetrating part of the brazing sheet adjacent to part of the brazing sheet having a bonding surface facing the channel.   
   
   
       2 . The brazed channel plate according to  claim 1 ,
 wherein the plurality of brazing sheets comprise:
 a middle sheet having a channel forming penetrating aperture; 
 a top sheet; and 
 a bottom sheet, 
 wherein the top and bottom sheets seal the channel forming penetrating aperture in the middle sheet, and have brazing material escape apertures penetrating bonding surfaces at positions not occupied by the channel forming penetrating aperture. 
   
   
   
       3 . The brazed channel plate according to  claim 2 ,
 wherein the middle sheet further has a brazing material escape aperture communicating with the brazing material escape apertures in the top and bottom sheets.   
   
   
       4 . The brazed channel plate according to  claim 2 ,
 wherein the middle sheet is provided in a plurality, the middle sheets having the same shape and being stacked on top of one another, and   wherein the number of each of the top sheet and the bottom sheet is one.   
   
   
       5 . The brazed channel plate according to  claim 1 ,
 wherein the plurality of brazing sheets comprise:
 a pair of a top brazing sheet and a bottom brazing sheet, at least one of the pair of top and bottom brazing sheets having a channel recess, and at least one of the pair of top and bottom brazing sheets having a brazing material escape aperture at a position not occupied by the channel recess. 
   
   
   
       6 . The brazed channel plate according to  claim 5 ,
 wherein the top and bottom brazing sheets have the brazing material escape apertures at least partially aligned with each other.   
   
   
       7 . The brazed channel plate according to  claim 1 ,
 wherein the brazing material escape aperture has an elongated shape extending along the channel.   
   
   
       8 . The brazed channel plate according to  claim 1 ,
 wherein the brazing material escape aperture is provided in a plurality intermittently along the channel.   
   
   
       9 . The brazed channel plate according to  claim 7 ,
 wherein the channel has a plurality of straight portions parallel to each other, and   wherein the brazing material escape aperture is provided between adjoining straight portions so as to be parallel to the straight portions.