Multi-pipe heat exchanger apparatus and method of producing the same
AssigneeHonda Motor Co., Ltd.
InventorTetsuya Ogawa
Life of this patent
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Abstract
In a heat exchanger, a plurality of heat conductive pipes forming first passages are provided between an outer wall plate and an inner wall plate. Air flows through the first passages. Second passages are formed between the heat conductive pipes. An exhaust gas flows through the second passages. Each of the heat conductive pipes has opposite walls limiting the passage width of the first passage. The walls are formed along involute curves. The second passages are formed by providing adjacent heat conductive pipes along the involute curves.
Claims9
A multi-pipe heat exchanger apparatus comprising a body unit and a plurality of heat conductive pipes provided in said body unit, first passages for a first fluid being formed in said heat conductive pipes, second passages for a second fluid being formed between said heat conductive pipes, wherein
- each of said heat conductive pipes has opposite walls limiting the passage width of said first passage, and said walls are formed along involute curves.
A method of producing a multi-pipe heat exchanger apparatus having a body unit, a plurality of heat conductive pipes provided in said body unit, first passages being formed in said heat conductive pipes, second passages being formed between said heat conductive pipes, the method comprising the step of
- forming opposite walls of each of said heat conductive pipes along involute curves, said walls limiting the passage width of said first passage.
Dependencies are inferred from the claim text.