Heat exchanger having integrated tank header and partition structure and partition inserting groove with leak detection

1. A heat exchanger, comprising:

a plurality of tubes which are arranged in parallel at a predetermined distance to be parallel with the direction of air flow and used as a flow path for a heat exchange medium;

a plurality of radiating fins which are interposed between the tubes;

headers which are formed with a plurality of tube inserting holes into which each end portion of the tube is fixedly inserted;

tank which is coupled with an upper portion of the headers and used as a passage for the a heat exchange medium;

at least one partition wall which is integrally formed with the header and partitions the passage for the heat exchange medium;

a partition inserting groove which is formed in a longitudinal direction of the tank so as to jointly insert the upper end portion of the partition wall therein; and

a leakage checking hole formed through the partition inserting groove and arranged to fluidly connect a space to outside of the tank,

wherein the space is formed between the partition inserting groove and an upper surface of the partition wall inserted into the partition inserting groove

whereby leaks are directed into and through said space to said leak checking hole for easy detection of leaks.

2. The heat exchanger according to claim 1 , wherein an upper portion of the tank where the partition inserting groove is formed has a ‘W’ shaped cross-section.

3. The heat exchanger according to claim 1 , wherein a clad sheet which forms the header is folded so as to protrude the middle portion thereof and the protruded portion forms the partition wall.

4. The heat exchanger according to claim 1 , wherein a tab is formed at a position of an upper end portion which corresponds to the leakage checking hole, and the tab has a size smaller than the size of the leakage checking hole and is inserted into the leakage checking hole.

5. The heat exchanger according to claim 4 , wherein the tab is formed with a protrusion and a brazing is performed in the state that the protrusion is coupled in a snap-in manner to the leakage checking hole.

6. The heat exchanger according to claim 1 , wherein the leakage checking hole is formed in such a manner that a portion of the partition inserting groove is removed so as to expose the space formed between the partition inserting groove and the upper surface of the partition wall to the outside of the tank.

7. The heat exchanger according to claim 1 , comprising a plurality of leakage checking holes, each of the leakage checking holes being formed in a longitudinal direction of the tank.