A heat exchanger includes a plurality of fins arranged as a network and delimiting corridors, and an envelope having an internal wall and an external wall, the internal and external walls delimiting between them a channel for a flow of a first fluid in a main direction, the network of fins being arranged in the channel and connected to the internal and external walls, at least one passage for a flow of a second fluid being embedded in at least one of the internal and external walls, the channel being, in the main direction, divergent and then convergent.

A heat exchanger in which an end portion of a heat exchange element is appropriately joined to an insertion hole of a header. The heat exchanger includes a heat exchange element extending in a first direction and a header to which the heat exchange element is connected. The heat exchange element includes at least one heat transfer tube extending in the first direction and a fin provided on part of an edge portion of the at least one heat transfer tube in a second direction crossing orthogonally with the first direction. An end portion in the first direction of the heat exchange element includes an insertion part being inserted into an interior of the header, an abutment part abutting the header in a part other than the insertion part, and a spaced-apart part being spaced apart from the header in a part other than the insertion part.

In a heat exchanger, an insertion hole of a header and an end portion of a heat exchange member can be properly joined. In the heat exchanger, the heat exchange member includes at least one heat transfer tube extending in the first direction and a fin that is formed at part of an end edge of the heat transfer tube in a second direction perpendicular to the first direction. The fin is provided at part of a portion of the heat exchange member that is other than an end portion thereof in the first direction. Part of the heat transfer tube that is located at the end portion of the heat exchange member has a smaller width in the second direction than a width of part of the heat transfer tube in the second direction that is located at a fin setting portion.

In a heat exchanger, an insertion hole of a header and an end portion of a heat exchange member can be properly joined. In the heat exchanger, the heat exchange member includes at least one heat transfer tube extending in the first direction and a fin that is formed at part of an end edge of the heat transfer tube in a second direction perpendicular to the first direction. The fin is provided at part of a portion of the heat exchange member that is other than an end portion thereof in the first direction. Part of the heat transfer tube that is located at the end portion of the heat exchange member has a smaller width in the second direction than a width of part of the heat transfer tube in the second direction that is located at a fin setting portion.

This invention concerns a transformer radiator. The radiator includes an inlet manifold, an outlet manifold and a heat exchange fin. The find extends between and is connected to the inlet and outlet manifolds. The heat exchange fin defines at least one oil flow passage to convey transformer oil, which, in use, enters the radiator through the inlet manifold, to the outlet manifold. The heat exchange fin is further provided by a single component having a continuously undulating profile and the manifolds extend transversely to the turns of the undulating profile.

This invention concerns a transformer radiator. The radiator includes an inlet manifold, an outlet manifold and a heat exchange fin. The find extends between and is connected to the inlet and outlet manifolds. The heat exchange fin defines at least one oil flow passage to convey transformer oil, which, in use, enters the radiator through the inlet manifold, to the outlet manifold. The heat exchange fin is further provided by a single component having a continuously undulating profile and the manifolds extend transversely to the turns of the undulating profile.

The present disclosure relates to a heat exchanger. The heat exchanger includes: a tube panel module elongated in an up-down direction and including a plurality of first tube panels and second tube panels that are alternately arranged in a left-right direction; header panel modules respectively formed at an upper end and a lower end of the tube panel module and elongated in a left-right direction; and a header case having an open one side, providing a space therein, and covered on the one side by the cover module such that the first tube panels and the second tube panels communicate with the space, in which the first tube panel is formed by bonding a first panel and a second panel, the second tube panel is formed by bonding a third panel and a fourth panel, and the header panel module includes: a first header panel formed by bending both ends of the first panel and the second panel in opposite directions; and a second header panel formed by bending both ends of the third panel and the fourth panel in opposite directions and bonded to the first header panel between every first tube panel and second tube panel. Accordingly, it is possible to increase the efficiency of manufacturing a heat exchanger, manufacture a heat exchanger flexibly in a custom-made type in accordance with the size of a product having the heat exchanger, reduce tolerance due to brazing, and improve stability of a product.

A laminate composite structure having at least one tubular region and at least one bonded region. The structure has a first composite layer, a second composite layer, a cavity, and one or more reinforcing fibers. Each composite layer comprises composite material with a top face and a bottom face opposite the top face. The top face of one is joined to the bottom face of the other along an interlaminar region. The cavity separates the bottom face and the top face to form a tube. The tube has an internal boundary defined by the bottom face and the top face. The reinforcing fibers line the internal boundary and are arranged so that the reinforcing fibers reduce the propensity of the composites layer to separate under internal pressure loading.

Disclosed are a heat exchange tube, a processing method for same, and a heat exchanger having same. The heat exchange tube (10a, 10b, 10c, 10d, 10e) includes a body portion (11a, 11b, 11c, 11d, 11e) provided with a plurality of flow channels (111a, 111b, 111c, 111d, 111e) arranged in parallel and spaced apart with each other, the length direction of the flow channel (111a, 111b, 111c, 111d, 111e) being parallel to the length direction of the body portion (11a, 11b, 11c, 11d, 11e); at least one side of the body portion (11a, 11b, 11c, 11d, 11e) is provided with an extension portion (12a, 12b, 12c, 12d, 12e) along the width direction of the body portion (11a, 11b, 11c, 11d, 11e); and the extension portion (12a, 12b, 12c, 12d, 12e) and at least part of the body portion (11a, 11b, 11c, 11d, 11e) are formed by folding the same plate material.

A helical fractal heat exchanger comprises a heat exchanger core defining a plurality of helical, first fluid conduits arranged in a two-dimensional grid configuration, and plurality of helical, second fluid conduits in thermal communication with the first fluid conduits. A first fluid inlet structure splits a first fluid from a first fluid inlet of the heat exchanger and supplies it to each of the plurality of first fluid conduits, and a first fluid outlet structure recombines the first fluid from the plurality of first fluid conduits and conveys it to a first fluid outlet of the heat exchanger. The first fluid inlet and outlet structures are each fractal structures comprising at least two multi-furcation stages in which a parent channel divides into two or more sub-channels that diverge away from each other.