A heat exchanger includes a plurality of first members, and a plurality of second members located between adjacent first members of the plurality of first members. The plurality of first members each include a plurality of openings and a first flow path connected to the plurality of openings. The plurality of second members each include a second flow path connected to the openings of the adjacent first members. The plurality of openings and the first flow path of the first member, and the second flow path of the second member define a flow path for a first fluid. A region between the adjacent first members defines a flow path for a second fluid. The heat exchanger further includes a third member extending toward the region on the first member.

In a header of a heat exchanger core, a header passage includes: at least one radial passage extending along a radial direction, and a plurality of circumferential passages branched from each radial passage and communicating with one or more of the axial passages, respectively. The flow passage area of each radial passage is smaller in a second position than in a first position, where the second position is inward of the first position in the radial direction.

A transfer tube for a thermal transfer device can include at least one wall having an inner surface and an outer surface, where the inner surface forms a cavity, where the at least one wall further has a first end and a second end. The first end can be configured to couple to a terminus of a heat exchanger of the thermal transfer device. The second end can be configured to couple to a collector box of the thermal transfer device. At least a portion of the at least one wall can be disposed in a vestibule of the thermal transfer device. The cavity can be configured to simultaneously receive a first fluid that flows from the first end to the second end and a second fluid that flows from the second end to the first end.

A rotary heat exchanger includes a hub configured to be rotatably driven by a shaft, a fan including a plurality of fan blades integrally coupled to the hub and extending radially outwardly therefrom, and a heat exchanger including a plurality of heat exchanger sections. The heat exchanger includes a plurality of cooling fins for receiving air from the fan. Each of the plurality of heat exchanger sections is located between two of the plurality of fan blades. The hub, the fan, and the heat exchanger are integrally formed as a single body by a three-dimensional printing process.

A method for fabricating heat exchangers using additive manufacturing technologies. Additive manufacturing enables the manufacture of heat exchangers with complex geometries and/or with internal and external integral surface features. Additive manufacture also facilitates the manufacture of heat exchangers with regional variations, such as changes in size, shape and surface features. In one embodiment, the present invention provides a heat exchanger with a helicoidal shape that provides axial elastic compliance. In one embodiment, the internal channel of the heat exchanger varies along its length. The internal channel may have a cross-sectional area that increases progressively from one end to the other. In one embodiment, the external shape of the tubular structure may be non-circular to optimize heat transfer with an external heat transfer fluid. In one embodiment, the present invention provides a heat pipe with an internal wicking structure formed as an integral part of the additive manufacturing process.

A heat dissipation member includes a condensation area, an evaporation area, and a capillary structure layer. The condensation area is arranged away from a heating element of an electronic apparatus in an application state. The evaporation area is arranged close to the heating element in the application state. A capillary force of the capillary structure layer in the evaporation area is greater than a capillary force of the capillary structure layer in the condensation area.

A two-phase immersion type heat dissipation fin composite structure is provided. The two-phase immersion type heat dissipation fin composite structure includes a heat dissipation base layer, a bubble activation layer, and a fin structure. The fin structure and the bubble activation layer are both formed on the heat dissipation base layer, or the fin structure is formed on the bubble activation layer. The bubble activation layer is immersed in a two-phase coolant for increasing an amount of bubbles that is generated.

In a metal fiber molded body (40), a ratio, to a presence ratio of metal fibers in a first cross-section, of a presence ratio of metal fibers in a second cross-section orthogonal to the first cross-section is in a range of 0.85 to 1.15. A method for manufacturing the metal fiber molded body (40) according to the present invention includes the steps of: accumulating a plurality of short metal fibers (30) on a receiving part; and sintering the plurality of short metal fibers (30) accumulated on the receiving part, to produce the metal fiber molded body (40).

A spiral heat exchanger features first spiral channels configured to form rows and columns of coiled hot fluid pathways to receive hot fluid; and second spiral channels configured to form corresponding rows and columns of coiled cold fluid pathways to receive cold fluid having a temperature less than the hot fluid. The first spiral channels and the second spiral channels are configured to alternate every other row and column so as to form a matrix of alternating rows and columns of coiled hot and cold fluid pathways separated by alternating coiled walls that act as both fluid separators and conduits through which heat is transferred between the hot fluid and cold fluid.

Some embodiments relate to constructing a heat exchanger using nanoink as a thermal bond interface between portions of the heat exchanger. The heat exchanger may comprise fins and at least one base. A nanoink may be applied to at least a portion of the fins. The pieces of the heat exchanger may be sintered such that the nanoink melts and forms a bond between the pieces of the heat exchanger. Some embodiments include a second base. Some embodiments incorporate dissimilar materials within the heat exchanger construction.