Patent ID: 8037925

Claim:
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.