Heat exchanger

Abstract

In a heat exchanger with a plurality of tubes, a header tank includes a core plate bonded to the tubes, a tank body fixed to the core plate, and an elastic member arranged between a bottom portion of a groove portion provided at an outer peripheral portion of the core plate and a tip end portion of the tank body to be elastically deformable therebetween. The elastic member is provided with a position determination portion which protrudes approximately in parallel with an inner bottom surface of the bottom portion of the groove portion. Furthermore, the position determination portion is configured in the elastic member to have a clearance between the position determination portion and the bottom surface of the bottom portion of the groove portion, and a clearance between the position determination portion and the tip end portion of the tank body.

1 . A heat exchanger comprising:
 a heat exchanging core portion including a plurality of tubes arranged in an arrangement direction, and a plurality of fins connected to outer surfaces of the tubes to facilitate heat exchange between a first fluid flowing inside of the tubes and a second fluid flowing outside of the tubes; and   a header tank disposed at one longitudinal end sides of the tubes to extend in the arrangement direction of the tubes and to communicate with the tubes, wherein   the header tank includes a core plate to which the one longitudinal end sides of the tubes are bonded, a tank body fixed to the core plate to defined therein a tank space, an elastic member arranged between a bottom portion of a groove portion provided at an outer peripheral portion of the core plate and a tip end portion of the tank body to be elastically deformable therebetween,   the tip end portion of the tank body is inserted into the groove portion of the core plate, while the elastic member is placed between bottom portion of the groove portion of the core plate and the tip end portion of the tank body,   the elastic member is provided with a position determination portion which protrudes approximately in parallel with an inner bottom surface of the bottom portion of the groove portion to prevent a position shift of the elastic member with respect to the core plate, and   the position determination portion is configured in the elastic member to have a clearance between the position determination portion and the bottom surface of the bottom portion of the groove portion, and a clearance between the position determination portion and the tip end portion of the tank body.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein
 the core plate includes extending portions extending in a tube longitudinal direction and defining a plurality of tube insertion holes into which the tubes are respectively inserted,   the extending portions are configured to define a wall portion of the groove portion,   the position determination portion includes a longitudinal position determination portion of the elastic member at an inner side of the elastic member in a position extending in the arrangement direction of the tubes, and   the longitudinal position determination portion is configured by protrusion portions to protrude respectively to portions between adjacent tube insertion holes and to contact the wall portion of the groove portion.   
     
     
         3 . The heat exchanger according to  claim 1 , wherein
 the position determination portion includes a longitudinal position determination portion of the elastic member at an inner side of the elastic member in a position extending in the arrangement direction of the tubes, and a minor-direction position determination portion of the elastic member at an inner side of the elastic member in a position extending in a direction perpendicular to the arrangement direction of the tubes, and   a protrusion dimension of the longitudinal position determination portion protruding to the inner side of the elastic member is different from a protrusion dimension of the minor-direction position determination portion protruding to the inner side of the elastic member.   
     
     
         4 . A heat exchanger comprising:
 a heat exchanging core portion including a plurality of tubes arranged in an arrangement direction, and a plurality of fins connected to outer surfaces of the tubes to facilitate heat exchange between a first fluid flowing inside of the tubes and a second fluid flowing outside of the tubes; and   a header tank disposed at one longitudinal end sides of the tubes to extend in the arrangement direction of the tubes and to communicate with the tubes, wherein   the header tank includes a core plate to which the one longitudinal end sides of the tubes are bonded, and a tank body fixed to the core plate to defined therein a tank space,   a tip end portion of the tank body is inserted into a groove portion provided at an outer-peripheral portion of the core plate when the tank body is fixed to the core plate,   the groove portion has a first groove part provided at two end sides of the core plate in the arrangement direction, and a second groove part provided at two end sides of the core plate in a direction perpendicular to the arrangement direction,   the first groove part has a groove width dimension different from a groove width dimension of the second groove part, and   the header tank has a dimension in the arrangement direction, which is equal to or larger than a dimension of the heat exchanging core portion in the arrangement direction.   
     
     
         5 . The heat exchanger according to  claim 4 , wherein the groove width dimension of the first groove part is larger than the groove width dimension of the second groove part. 
     
     
         6 . The heat exchanger according to  claim 5 , wherein
 the tip end portion of the tank body includes a first expanding portion located at two end sides of the arrangement direction to extend in the direction perpendicular to the arrangement direction, and a second expanding portion located at two end sides in the direction perpendicular to the arrangement direction to extend in the arrangement direction, and   the first expanding portion has an expanding dimension expanding in the arrangement direction, which is larger than an expanding dimension of the second expanding portion expanding in the direction perpendicular to the arrangement direction.   
     
     
         7 . The heat exchanger according to  claim 4 , further comprising
 an elastic member arranged between a bottom portion of the groove portion of the core plate and the tip end portion of the tank body to be elastically deformable therebetween, wherein   the tip end portion of the tank body is inserted into the groove portion of the core plate, while the elastic member is placed between the bottom portion of the groove portion of the core plate and the tip end portion of the tank body.   
     
     
         8 . A heat exchanger comprising:
 a plurality of tubes arranged in an arrangement direction, in which a fluid flows; and   a header tank disposed at one longitudinal end sides of the tubes to extend in the arrangement direction of the tubes and to communicate with the tubes, wherein   the header tank includes a core plate to which the one longitudinal end sides of the tubes are bonded, a tank body fixed to the core plate to defined therein a tank space, a circular elastic member arranged between a bottom portion of a groove portion provided at an outer peripheral portion of the core plate and a tip end portion of the tank body to be elastically deformable therebetween,   the tip end portion of the tank body is inserted into the groove portion of the core plate in an insertion direction, while the elastic member is placed between the bottom portion of the groove portion of the core plate and the tip end portion of the tank body,   the core plate has a claw portion protruding from an outer peripheral wall portion of the groove portion and bent along an outer surface of the tank body to be fixed to the tank body, and a contact surface provided to cross with the insertion direction of the tip end portion of the tank body,   the tank body is provided with a plurality of position determination portions protruding to a side perpendicular to the insertion direction of the tip end portion of the tank body, and   the position determination portions of the tank body contact the contact surface of the core plate.   
     
     
         9 . The heat exchanger according to  claim 8 , wherein
 a plurality of the claw portions are provided to protrude from the outer peripheral wall portion of the groove portion of the core plate toward the tank body, and   the contact surface is provided between adjacent claw portions.   
     
     
         10 . The heat exchanger according to  claim 8 , wherein
 the core plate has a polygon shape, and   the position determination portion is provided at least at an angular portion of the core plate.   
     
     
         11 . The heat exchanger according to  claim 8 , wherein the position determination portions are positioned inside of the outermost peripheral portion of the core plate.