Diffusion-Bonded Heat Exchanger

Abstract

A diffusion-bonded heat exchanger (100) includes a core (1) in which a first heat transfer plate (10) and a second heat transfer plate (20) are stacked and diffusion-bonded to each other, a plurality of pairs of first ports (2), and second ports (3). The first heat transfer plate (10) includes a plurality of first fluid passages (11).

1 . A diffusion-bonded heat exchanger comprising:
 a core in which a first heat transfer plate and a second heat transfer plate each including a groove-like fluid passage are stacked and diffusion-bonded to each other;   a plurality of pairs of first ports through which fluids are introduced into and discharged from the first heat transfer plate; and   at least a pair of second ports through which a fluid is introduced into and discharged from the second heat transfer plate, wherein   the first heat transfer plate includes a plurality of first fluid passages connected to different pairs of the first ports and isolated from each other.   
     
     
         2 . The diffusion-bonded heat exchanger according to  claim 1 , wherein
 the second ports include a plurality of pairs of second ports,   the second heat transfer plate includes a plurality of second fluid passages formed so as to correspond to the first fluid passages of the first heat transfer plate and isolated from each other, and   the plurality of second fluid passages are respectively connected to different pairs of the second ports.   
     
     
         3 . The diffusion-bonded heat exchanger according to  claim 2 , wherein
 the second fluid passages are equal in number to the first fluid passages, and the second fluid passages are respectively disposed at locations that overlap the plurality of first fluid passages of the first heat transfer plate in a planar view.   
     
     
         4 . The diffusion-bonded heat exchanger according to  claim 1 , wherein
 the plurality of first fluid passages are each formed into an elongated shape that extends in a first direction from one end connected to the first port on an entrance side toward another end connected to the first port on an exit side corresponding thereto in a plane of the first heat transfer plate, and are disposed side by side along a second direction orthogonal to the first direction.   
     
     
         5 . The diffusion-bonded heat exchanger according to  claim 4 , wherein
 the plurality of first fluid passages are spaced apart from each other in the second direction on a same surface of the first heat transfer plate, and   the first heat transfer plate includes a diffusion bonding surface with the second heat transfer plate between the first fluid passages adjacent to each other in the second direction.   
     
     
         6 . The diffusion-bonded heat exchanger according to  claim 1 , wherein
 each of the plurality of first fluid passages includes a flow passage that connects one end connected to the first port on an entrance side to another end connected to the first port on an exit side corresponding thereto, and   at least one of the plurality of first fluid passages is different from another one of the plurality of first fluid passages in at least one of a flow passage width of the flow passage, a flow passage length of the flow passage, a flow passage depth of the flow passage, and a number of the flow passages.