Heat exchanger

Abstract

A heat exchanger includes a plurality of flat tubes stacked with each other, and a tank connected at an end of each tubes to communicate with the tubes. The tank includes a tube joint part having a plurality of tube inserting holes, and a plurality of ribs extending in a tube width direction on the tube joint part. The ends of the ribs are positioned outside of the ends of the tube inserting holes. The tube joint part has a deformation allowable portion at an outside of the ends of the ribs so as to allow the tube joint part to be deformed in a tube longitudinal direction. The tube joint part has a plurality of approximately V-shaped cross-sections, in which the tube inserting hole and the rib are provided without a flat face therebetween.

1 . A heat exchanger comprising: 
 a plurality of flat tubes stacked with each other in a tube stacking direction, each of the tubes extends in a tube longitudinal direction;    a tank connected at an end of each tubes in the tube longitudinal direction to communicate with the tubes, wherein the tank includes a tube joint part having a plurality of tube inserting holes, into which the ends of the tubes are inserted so as to be connected to the tank; and    a plurality of ribs on the tube joint part, wherein the ribs extend in a tube width direction being perpendicular to the tube stacking direction and the tube longitudinal direction, wherein:    ends of the ribs in the tube width direction are positioned outside of ends of the tube inserting holes;    the tube joint part has a deformation allowable portion outside of the ends of the ribs;    the deformation allowable portion allows the tube joint part to be deformed in the tube longitudinal direction; and    the tube joint part has a plurality of approximately V-shaped cross-sections, in which the tube inserting hole and the rib are provided without a flat face therebetween.    
   
   
       2 . A heat exchanger comprising: 
 a plurality of flat tubes stacked with each other in a tube stacking direction, each of the tubes extends in a tube longitudinal direction;    a tank connected at an end of each tubes in the tube longitudinal direction to communicate with the tubes, wherein the tank includes a tube joint part having a plurality of tube inserting holes, into which the ends of the tubes are inserted so as to be connected to the tank; and    a plurality of ribs on the tube joint part, wherein the ribs extend in a tube width direction being perpendicular to the tube stacking direction and the tube longitudinal direction, wherein:    the tank further includes a wall portion bent from a periphery portion of the tube joint part;    ends of the ribs in the tube width direction are positioned outside of ends of the tube inserting holes, without being connected to the wall portion; and    the tube joint part has a plurality of approximately V-shaped cross-sections, in which the tube inserting hole and the rib are provided without a flat face therebetween.    
   
   
       3 . The heat exchanger according to  claim 1 , wherein: 
 the ribs are disposed between the tube inserting holes adjacent to each other in the tube stacking direction.    
   
   
       4 . The heat exchanger according to  claim 1 , wherein: 
 the tank includes a core plate made of metal, and a tank portion made of resin for forming a tank space together with the core plate; and    the core plate includes the tube joint part joined to the tube, and a tank joint part joined to the tank portion.    
   
   
       5 . The heat exchanger according to  claim 1 , wherein: 
 the tubes are fixed to the tube inserting holes by blazing.    
   
   
       6 . The heat exchanger according to  claim 1 , wherein: 
 the tube inserting hole is provided to have a burring portion in its periphery.    
   
   
       7 . The heat exchanger according to  claim 1 , wherein: 
 the ribs are convex protruding outside from the tank at tip ends of the V-shaped cross-sections; and    the deformation allowable portion is connected to the ends of the ribs in a curve.    
   
   
       8 . The heat exchanger according to  claim 2 , wherein: 
 the ribs are disposed between the tube inserting holes adjacent to each other in the tube stacking direction.    
   
   
       9 . The heat exchanger according to  claim 2 , wherein: 
 the tank includes a core plate made of metal, and a tank portion made of resin for forming a tank space together with the core plate; and    the core plate includes the tube joint part joined to the tube, and a tank joint part joined to the tank portion.    
   
   
       10 . The heat exchanger according to  claim 2 , wherein: 
 the tubes are fixed to the tube inserting holes by blazing.    
   
   
       11 . The heat exchanger according to  claim 2 , wherein: 
 the tube inserting hole is provided to have a burring portion in its periphery.    
   
   
       12 . The heat exchanger according to  claim 2 , wherein: 
 the ribs are convex protruding outside from the tank at tip ends of the V-shaped cross-sections;    the tube joint part has a deformation allowable portion outside of the ends of the ribs; and    the deformation allowable portion is connected to the ends of the ribs in a curve.