Heat exchanger and method for manufacturing the same
AssigneeDenso Corporation
InventorsAkira Uchikawa, Yasutoshi Yamanaka, Takaaki Sakane, Satomi Muto, Homare Koutate
Life of this patent
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Abstract
According to the present invention, a first tube is constructed by connecting a plate material into a tubular shape. In the manufacturing process, after an inner fin is disposed around an outer wall of a second tube, the first tube is disposed around the second tube, and the first tube and the second tube are fixed by connecting the plate material in such a manner that the inner fin is in contact with the both tubes. In this way, the inner fin and both tubes are certainly contacted closely to each other without enlarging the second tube.
Claims20
A heat exchanger, comprising:
- a first flat shaped tube formed by a plate material, said first flat shaped tube having a first connection portion located on a narrower side of said first flat shaped tube and extending in a longitudinal direction thereof, for connecting an end portion of the plate material;
- a second flat shaped tube disposed in said first flat shaped tube, in parallel with said first flat shaped tube, to form a passage therewith, through which a fluid passes;
- an inner fin disposed in said passage in contact with a wider side of said first flat shaped tube and a wider side of said second flat shaped tube, said inner fin being for facilitating a heat-exchange of the fluid;
- and
- a second connection portion extending generally perpendicular to said longitudinal direction on at least one of the wider sides of said first and second flat shaped tubes, said second connection portion being directly connected to the other of said first and second flat shaped tubes.
A heat exchanger comprising:
- a first flat shaped tube formed by a first material, said first flat shaped tube having a first connection portion located on a narrower side of said first flat shaped tube and extending in a longitudinal direction thereof, for connecting an end portion of the first plate material;
- a second flat shaped tube disposed in said first flat shaped tube, in parallel with said first flat shaped tube, to form a passage therewith, through which a fluid passes, said second flat shaped tube being formed by connecting an end portion of the second plate material;
- an inner fin disposed in said passage in contact with a wider side of said first flat shaped tube and a wider side of said second flat shaped tube, said inner fin being for facilitating the heat-exchange of the fluid;
- and
- a second connection portion extending generally perpendicular to said longitudinal direction on at least one of the wider sides of said first and second flat shaped tubes, said second connection portion being directly connected to the other of said first and second flat shaped tubes.
A heat exchanger comprising:
- a first flat shaped tube formed by a plate material, said first flat shaded tube having a first connection portion located on a narrow side of said first flat shaped tube, said first connection portion securing an end portion of the plate material to form a chamber;
- a second flat shaped tube disposed within said chamber to form a passage located between said first and second flat shaped tubes;
- an inner fin disposed within said passage, said inner fin contacting a wider side of said first flat shaped tube and a wider side of said second flat shaped tube when said first connection portion secures the end portion of the plate material;
- and
- a second connection portion extending generally perpendicular to said longitudinal direction on at least one of the wider sides of said first and second flat shaped tubes, said second connection portion being directly connected to the other of said first and second flat shaped tubes.
Dependencies are inferred from the claim text.