Boss structure and heat exchanger fixing systems including the same

Abstract

The present invention relates to a boss structure, and more particularly, to a boss structure applied to a heat exchanger. The present invention provides a boss structure and a heat exchanger fixing system including the same, in which a thickness of boss structure is reduced by forming a groove at a center of a coupling portion of a boss press-fitted with a plate, such that a boss part may be easily press-fitted with the plate, the plate and the boss part may be more securely coupled, and weldability may be improved during brazing, and a heat exchanger fixing system including the same.

What is claimed is: 
     
         1 . A boss structure, which is applied to a heat exchanger and fixes the heat exchanger to an external component, the boss structure comprising:
 a coupling portion coupled to a cover plate of the heat exchanger and extending in a direction perpendicular to one surface of the cover plate; and   a protruding portion protruding from one end of the coupling portion.   
     
     
         2 . The boss structure of  claim 1 , wherein the coupling portion has a caulking portion that is a circular groove having a predetermined depth in a direction identical to an extension direction of the coupling portion. 
     
     
         3 . The boss structure of  claim 2 , wherein a depth of the caulking portion is equal to or shorter than an extension length of the coupling portion. 
     
     
         4 . The boss structure of  claim 2 , wherein the protruding portion comprises a screw thread portion formed in an inner surface thereof and having a predetermined depth in the direction identical to the extension direction of the coupling portion, and
 wherein the screw thread portion and the caulking portion are spaced apart from each other at a predetermined interval in the extension direction of the coupling portion.   
     
     
         5 . The boss structure of  claim 4 , wherein one surface of the caulking portion, which faces a distal end surface of the screw thread portion, is formed in a shape corresponding to the distal end surface of the screw thread portion. 
     
     
         6 . The boss structure of  claim 2 , wherein the protruding portion comprises a screw thread portion having a screw thread formed on a lateral surface thereof, the screw thread portion being formed to have a predetermined depth in the direction identical to the extension direction of the coupling portion, and
 wherein the screw thread portion and the caulking portion are connected to each other.   
     
     
         7 . The boss structure of  claim 6 , wherein at least one projection having a predetermined height is formed on an inner surface of the caulking portion. 
     
     
         8 . The boss structure of  claim 6 , wherein an inner surface of the caulking portion is formed in a stepped shape, and an inner diameter of the caulking portion increases from one end toward the other end of the coupling portion. 
     
     
         9 . The boss structure of  claim 6 , wherein a diameter of the screw thread portion is smaller than a diameter of the caulking portion. 
     
     
         10 . The boss structure of  claim 2 , wherein the coupling portion is formed to be inclined outward toward a distal end from a portion that adjoins the protruding portion. 
     
     
         11 . The boss structure of  claim 1 , wherein the protruding portion and the coupling portion are made of the same material and integrated. 
     
     
         12 . A heat exchanger fixing system comprising:
 a boss structure comprising a coupling portion coupled to a cover plate of a heat exchanger and extending in a direction perpendicular to one surface of the cover plate, and a protruding portion protruding from one end of the coupling portion;   a cover plate having one surface provided in surface contact with an outer surface of the heat exchanger, the cover plate having a mounting hole into which the boss structure is fitted,   wherein an extension portion protruding by a predetermined height to the outside of the heat exchanger is provided at an edge of the mounting hole.   
     
     
         13 . The heat exchanger fixing system of  claim 12 , wherein the protruding portion has a diameter larger than a diameter of the mounting hole and adjoins and spans a distal end of the extension portion. 
     
     
         14 . The heat exchanger fixing system of  claim 12 , wherein an extension length of the coupling portion is shorter than an extension length of the extension portion. 
     
     
         15 . The heat exchanger fixing system of  claim 12 , wherein the coupling portion is formed in a shape corresponding to an inner surface of the extension portion of the cover plate, and an entire outer surface of the coupling portion adjoins the inner surface of the extension portion. 
     
     
         16 . The heat exchanger fixing system of  claim 12 , wherein the coupling portion is fitted into the mounting hole and coupled to the mounting hole by brazing.