Plate heat exchanger

Abstract

Plate heat exchanger includes heat transfer plates each including heat transfer portion with 1st surface and 2nd surface, heat transfer portions stacked in 1st direction, 1st channel for circulating 1st medium in 2nd direction orthogonal to 1st direction formed between opposed 1st surfaces, and 2nd channel for circulating 2nd medium in 2nd direction formed between opposed 2nd surfaces. Each heat transfer portion includes barrier ridges on 1st surface that extend in direction crossing 2nd direction, divides heat transfer portion into divided areas in 2nd direction, and crosses and abuts against ridges of 1st surface of opposed heat transfer portion. Each heat transfer portion includes 2nd flow channel forming valleys on 2nd surface arranged at intervals in 3rd direction orthogonal to both 1st and 2nd directions in each divided area from its one end to its other end in 2nd direction.

1 . A plate heat exchanger, comprising:
 a plurality of heat transfer plates each including a heat transfer portion having a first surface on which ridges and valleys are formed, and a second surface that is opposed to the first surface and on which valleys being in a front-back relationship with the ridges of the first surface and ridges being in a front-back relationship with the valleys of the first surface are formed, the plurality of heat transfer plates respectively having the heat transfer portions stacked on each other in a first direction,   wherein the first surface of the heat transfer portion of each of the plurality of heat transfer plates is arranged opposed to the first surface of the heat transfer portion of an adjacent heat transfer plate on one side in the first direction, and the second surface of the heat transfer portion of each of the plurality of heat transfer plates is arranged opposed to the second surface of the heat transfer portion of an adjacent heat transfer plate on an other side in the first direction,   wherein a first flow channel through which a first fluid medium is circulated in a second direction orthogonal to the first direction is formed between the first surfaces of the heat transfer portions of each adjacent heat transfer plates, and a second flow channel through which a second fluid medium is circulated in the second direction is formed between the second surfaces of the heat transfer portions of each adjacent heat transfer plates, and   wherein the heat transfer portion of at least one of each adjacent heat transfer plates comprises:   as the ridges formed on the first surface, at least one barrier ridge that crosses a centerline extending in the second direction of the heat transfer portion and is formed over the entire length in a third direction orthogonal to the first direction and the second direction of the heat transfer portion, and that divides the heat transfer portion into two or more divided areas in the second direction, the at least one barrier ridge crossing and abutting against the ridges formed on the first surface of the heat transfer portion of the opposed heat transfer plate aligned adjacently, and   as the valleys formed on the second surface, a plurality of second flow channel forming valleys constituting part of the second flow channel, the plurality of second flow channel forming valleys being arranged at intervals from each other in the third direction in each of the two or more divided areas from one end to an other end in the second direction of each corresponding one of the two or more divided areas.   
     
     
         2 . The plate heat exchanger according to  claim 1 ,
 wherein each of the heat transfer portions of the each adjacent heat transfer plates comprises:   the at least one barrier ridge and the second flow channel forming valleys,   as the valleys formed on the first surface, a plurality of first flow channel forming valleys constituting part of the first flow channel, the plurality of first flow channel forming valleys being arranged at intervals from each other in the third direction in each of the two or more divided areas from the one end to the other end in the second direction of each corresponding one of the two or more divided areas, and   as the ridges formed on the first surface, a plurality of first flow channel side ridges each formed in the third direction between each adjacent first flow channel forming valleys, the first flow channel side ridges each extending from the one end to the other end in the second direction of each corresponding one of the two or more divided areas, and   wherein the first flow channel side ridges in the mutually corresponding divided areas of the adjacent heat transfer plates are arranged with a clearance therebetween.   
     
     
         3 . The plate heat exchanger according to  claim 2 , wherein
 a projected amount of the at least one barrier ridge in the first direction is set to be larger than a projected amount of the first flow channel side ridges in the first direction.   
     
     
         4 . The plate heat exchanger according to  claim 2 , wherein
 the plurality of first flow channel side ridges in the mutually corresponding divide areas of the each adjacent heat transfer plates are arranged while being displaced with each other in the third direction.   
     
     
         5 . The plate heat exchanger according to  claim 1 , wherein
 each of the heat transfer portions of the each adjacent heat transfer plates comprises:   the at least one barrier ridge and the second flow channel forming valleys, and   as the ridges formed on the second surface, a plurality of second flow channel side ridges each formed in the third direction between each adjacent second flow channel forming valleys, the second flow channel side ridges each extending from the one end to the other end of the divided area in the second direction, and   top ends of the second flow channel side ridges in the mutually corresponding divided areas of each adjacent heat transfer plates with the second surfaces of the heat transfer portions opposed to each other are in contact with each other.   
     
     
         6 . The plate heat exchanger according to  claim 1 , wherein
 each of the heat transfer portions of the each adjacent heat transfer plates comprises:   the at least one barrier ridge and the second flow channel forming valleys, and   as the ridges formed on the second surface, a plurality of second flow channel side ridges each formed in the third direction between each adjacent second flow channel forming valleys, the second flow channel side ridges each extending from the one end to the other end in the second direction of each corresponding one of the two or more divided areas, and   the second flow channel side ridges in the mutually corresponding divided areas of the each adjacent heat transfer plates with the second surfaces of the heat transfer portions opposed to each other are arranged with a clearance therebetween.   
     
     
         7 . The plate heat exchanger according to  claim 6 , wherein
 the plurality of second flow channel side ridges in the mutually corresponding divided areas of the each adjacent heat transfer plates are arranged while being displaced in the third direction.   
     
     
         8 . The plate heat exchanger according to  claim 1 , wherein
 the at least one barrier ridge includes two or more barrier ridges provided at intervals in the second direction, and   the two or more barrier ridges divide each corresponding one of the heat transfer portions into three or more divided areas.   
     
     
         9 . The plate heat exchanger according to  claim 1 , wherein
 the barrier ridge comprises at least one bent ridge portion that comprises a pair of inclined ridge portions each having a proximal end and a distal end on an opposite side of the proximal end, the pair of inclined ridge portions being inclined in directions opposite to each other with respect to the centerline extending in the second direction or a virtual line parallel to the centerline, and having the distal ends thereof connected to each other.   
     
     
         10 . The plate heat exchanger according to  claim 9 , wherein
 each of the heat transfer portions of the each adjacent heat transfer plates includes the barrier ridge having the bent ridge portion, and   the bent ridge portions of the barrier ridges of the each adjacent heat transfer plates are bent in directions completely opposite to each other and comprise the inclined ridge portions of the bent ridge portions opposed to each other crossing and abutting against each other.   
     
     
         11 . The plate heat exchanger according to  claim 1 , wherein the barrier ridge extends straightforwardly in the third direction. 
     
     
         12 . The plate heat exchanger according to  claim 11 , wherein
 each of the heat transfer portions of the each adjacent heat transfer plates includes the barrier ridge extending in the third direction, and   the barrier ridges of the each adjacent heat transfer plates are arranged while being displaced with each other in the second direction.