Patent ID: 6523607
Filing Date: 2003-02-25
Classification: F28D,F28F,Y10T

Abstract:
A module-type heat exchanger comprising:a core; said core including a pair of header pipes each formed from a round pipe of a desired length and having engagement recesses previously formed in the inner surfaces at opposite open ends of said round pipe, said pair of header pipes each having a multiplicity of flat holes formed in parallel and at regular intervals in the peripheral surface; a multiplicity of flat tubes having opposite ends which are inserted into said flat holes, with their insertion portions being joined in a liquid tight manner; and a multiplicity of fins fixedly secured to the outer surface of each of said flat tubes; and end members and an end cover which are fitted via O-rings for sealing to the openings of said header pipes in a liquid tight manner, wherein said end members at their fitting portions have outer peripheries which conform to the inner peripheries of said header pipes, said end members each including a claw formed protrusively on its outer periphery to be engaged with said engagement recess to provide a prevention of disengagement in the axial direction, and an annular recess formed in its outer periphery for receiving said O-ring.