Heat exchanger

Abstract

A heat exchanger that performs heat exchange between a first fluid and a second fluid includes a first duct plate, a second duct plate, a flow path member, a caulking plate, an insertion projection, and a contact protrusion. The insertion protrusion protrudes from at least one of the first duct plate and the second duct plate toward the caulking plate, and is inserted into an insertion hole defined in the caulking plate. The contact protrusion protrudes from at least one of the first duct plate and the second duct plate toward the caulking plate, and is fixed to, and in contact with, a stopper wall of the caulking plate. A surface of the contact protrusion is in contact with a stopper plane wall when the contact protrusion is fixed to the frame member.

1 . A heat exchanger that performs heat exchange between a first fluid and a second fluid, the heat exchanger comprising:
 a first duct plate;   a second duct plate that is disposed to face the first duct plate, the second duct plate defining, together with the first duct plate, a first flow path for the first fluid to flow therethrough;   a plurality of flow path members that are stacked within the first flow path in a direction along which the first duct plate and the second duct plate face each other, each of the plurality of flow path members defining a second flow path for the second fluid to flow therethrough;   a frame member that is disposed at an opening of the first flow path defined by the first duct plate and the second duct plate;   an insertion protrusion that protrudes toward the frame member from at least one of the first duct plate and the second duct plate and is inserted into an insertion hole defined in the frame member; and   a contact protrusion that protrudes toward the frame member from the at least one of the first duct plate and the second duct plate, the contact protrusion being fixed to, and in contact with, the frame member, wherein   the contact protrusion has a surface having a normal line that intersects a thickness direction of the contact protrusion,   the frame member includes a stopper plane wall having a normal line extending along a thickness direction of the frame member, and   the surface of the contact protrusion is in contact with the stopper plane wall when the contact protrusion is fixed to the frame member.   
     
     
         2 . A heat exchanger that performs heat exchange between a first fluid and a second fluid, the heat exchanger comprising:
 a first duct plate;   a second duct plate that is disposed to face the first duct plate, the second duct plate defining, together with the first duct plate, a first flow path for the first fluid to flow therethrough;   a plurality of flow path members that are stacked within the first flow path in a direction along which the first duct plate and the second duct plate face each other, each of the plurality of flow path members defining a second flow path for the second fluid to flow therethrough;   a frame member that is disposed at an opening of the first flow path defined by the first duct plate and the second duct plate;   a flange portion that extends from the first duct plate in a direction along an opening face of the frame member, the flange portion being fixed to, and in contact with, the frame member;   an insertion protrusion that protrudes toward the frame member from the second duct plate and is inserted into an insertion hole defined in the frame member; and   a contact protrusion that protrudes toward the frame member from the second duct plate and is fixed to, and in contact with, the frame member, wherein   the contact protrusion has a surface having a normal line that intersects a thickness direction of the contact protrusion,   the frame member includes a stopper plane wall having a normal line extending along a thickness direction of the frame member, and   the surface of the contact protrusion is in contact with the stopper plane wall when the contact protrusion is fixed to the frame member.   
     
     
         3 . The heat exchanger according to  claim 1 , wherein
 the insertion hole is a through hole allowing the insertion protrusion to pass therethrough.   
     
     
         4 . The heat exchanger according to  claim 1 , wherein
 the insertion hole is a hole having a dead end in a middle of the frame member in the thickness direction of the frame member.   
     
     
         5 . The heat exchanger according to  claim 1 , wherein
 the insertion protrusion has a polygonal shape,   the inner wall of the insertion hole is curved, and   a corner of the insertion protrusion and the inner wall of the insertion hole are fixedly connected to each other.   
     
     
         6 . The heat exchanger according to  claim 1 , wherein
 the insertion protrusion is split and caulked while being inserted into the insertion hole.   
     
     
         7 . The heat exchanger according to  claim 1 , wherein
 the contact protrusion is in contact with a stopper wall around the insertion hole in the frame member.   
     
     
         8 . The heat exchanger according to  claim 1 , wherein
 the contact protrusion is two contact protrusions disposed on both sides of the insertion protrusion.   
     
     
         9 . The heat exchanger according to  claim 1 , wherein
 the second duct plate, the insertion protrusion, and the contact protrusion are integrally formed of a single base material, and   the contact protrusion extends from the second duct plate to be tilted toward one side of a thickness direction of the second duct plate.   
     
     
         10 . The heat exchanger according to  claim 9 , wherein
 the contact protrusion extends from the second duct plate to be tilted circumferentially inward of the frame member toward one side of a thickness direction of the second duct plate.   
     
     
         11 . The heat exchanger according to  claim 1 , wherein
 the first duct plate, the second duct plate, the plurality of flow path members, the frame member, the flange portion, the insertion protrusion, and the contact protrusion are fixed by brazing.