A heat exchanger is provided. The heat exchanger includes a first wall manifold. The heat exchanger further includes a second wall manifold spaced apart from the first wall manifold. The heat exchanger further includes a plurality of vanes that extend generally circumferentially between the first wall manifold and the second wall manifold. The heat exchanger further includes a plurality of fluid circuits defined within the heat exchanger. Each fluid circuit in the plurality of fluid circuits includes an inlet channel portion and an outlet channel portion defined within the first wall manifold. A return channel portion defined within the second wall manifold. At least one passage portion of a plurality of passage portions defined within each vane of the plurality of vanes. The at least one passage portion extends between the return channel portion and one of the inlet channel portion and the outlet channel portion.

A heat exchanger includes a plurality of flat tubes, a header collecting tube, and fins joined to the flat tubes. The header collecting tube includes a first partition member partitioning an internal space into upper and lower internal spaces, a second partition member partitioning the upper internal space into first and second spaces, an inflow port formed on the first partition member at a bottom part of the first space so as to penetrate in a plate thickness direction, an upper communicating passage, a lower communicating passage. The flat tubes are connected at one end to the first space of the header collecting tube. An inflow pipeline is connected to space that, within the lower internal space, is underneath the second space.

A heat exchanger circuit can include a heat exchanger having a body with a plurality of cooling fins for the heat exchanger, a plurality of core cooling channels within the body, a plurality of de-congealing channels in fluid communication with the plurality of core cooling channels, and a by-pass valve in fluid communication with the plurality of core cooling channels and the plurality of de-congealing channels.

A heat dissipation device includes a storage structure, plural pipes, plural heat sink fin groups and a vaporization-enhancing structure. The heat sink fin groups are disposed on outer surfaces of the pipes. The storage structure includes a chamber. The storage structure is in thermal contact with a heat source. Each pipe has a channel. A first end of the channel is in fluid communication with the chamber. A working medium is filled in the chamber and the channels of the pipes. The vaporization-enhancing structure is disposed within the chamber and in thermal contact with at least a portion of the working medium. After the vaporization-enhancing structure receives heat energy from the heat source, the heat energy is transferred to the working medium. The vaporization-enhancing structure facilitates liquid-gas transformation of the working medium. Consequently, the working medium moves toward a second end of the first channel.

Embodiments of a surface heat exchanger for a vehicle are described. In one embodiment, a surface heat exchanger includes a plurality of fins on a first outer surface The surface heat exchanger is mounted within an interior of a duct of a vehicle. An inlet of the duct is located on a side of the vehicle forward of a rear axle of the vehicle and an outlet of the duct is located rearward of the inlet. The plurality of fins of the surface heat exchanger are exposed to the interior of the duct. The plurality of fins are configured to transfer heat to airflows interacting with the plurality of fins as the airflows pass through the duct.

A surface heat exchanger for an aircraft turbomachine includes a support wall, a panel parallel to the support wall, partitions connecting the wall to the panel to define channels in which an air flow flows, and fins situated in the channels. The panel has a central part parallel to the wall and a downstream part that is inclined with respect to the wall. An upstream end is connected to the central part and a downstream end is situated at a distance from the wall and delimits with the latter a main outlet of the channels. The downstream part has fixed flaps disposed one after another so as to delimit between one another additional outlets of the channels.

The invention relates to a heat exchanger assembly with at least one multi-pass heat exchanger, comprising a first distributor (1) with a first connection part (1a) for connecting to a fluid line (9), a second distributor (2) with a second connection part (2a) for connecting to a fluid line (9), and at least one first deflection distributor (4), as well as a plurality of tube lines (5) through which a fluid, in particular water, can flow, wherein the first distributor (1) and the second distributor (2) are arranged at one end (A) of the heat exchanger assembly, the deflection distributor (4) is arranged at the opposite end (B) and the tube lines (5) extend from the one end (A) to the opposite end (B), and wherein the first connection part (1a) is arranged at a lowest point (T) or at least near to the lowest point (T) of the first distributor (1) and the second connection piece (2a) is arranged at a lowest point (T) or at least near to the lowest point (T) of the second distributor (2). In order to allow for the heat exchanger assembly to be quickly filled with the fluid and quickly emptied, a third connection part (3) is arranged on the first distributor (1) and/or on the second distributor (2) at a highest point (H) or at least near to the highest point (H) of the respective distributor (1 or 2), and at least one ventilation opening (10) is provided at a highest point (T) or at least near to the highest point (T) of the deflection distributor (4) for pressure equalisation with the environment.

The invention provides a finned heat sink (100) comprising a plurality of fins (200) and a base part (300) from which the fins (200) extend, the fins (200) having a thickness (d1) and a height (h1) with d1/h1<1, the fins (200) having inter-fin distances (d2) with d2/h1<1, the base part (300) comprising a plurality of fin extensions (310) and a support element (320), with the fin extensions (310) configured in a plane (P) of the base part (300) and with the fin extensions (310) associated with the support element (320), wherein the support element (320) includes bridging parts (330) bridging the inter-fin distances (d2), wherein the bridging parts (330) comprise length reducing parts (340) selected from the group comprising a roll (341), a curve (342), and an angle (343). The invention further provides method for producing a finned heat sink (100), an electronic device (1000) comprising a functional component (1100) configured in thermal contact with the finned heat sink (100), a method for producing such electronic device (1000) and a tool (2000) for bending at least part of a bridging part (330) of a finned heat sink (100).

A heat exchanger (100) comprises: a first header tube (1) and two second header tubes (3); a first heat exchange tube (51) in fluid communication with one of the two second header tubes (3) and a second chamber (B) of the first header tube (1); a first runner tube (61) in fluid communication with the one of two second header tubes (3) and a first chamber (A) of the first header tube (1); a second heat exchange tube (52) in fluid communication with the other of the two second header tubes (3) and the first chamber (A) of the first header tube (1); and a second runner tube (62) in fluid communication with the other of the two second header tubes (3) and the second chamber (B) of the first header tube (1). The heat exchanger (100) bends at a first bending portion (71) between the other of the two second header tubes (3) and the first header tube (1), so as to enable the other of the two second header tubes (3) to be higher or lower than the first header tube (1).

A dual seated by-pass valve is provided for a surface heat exchanger. The valve provides a power element and at least two seats and two poppets which are spring biased and responsive to movement of the power element to open and close pathways to core cooling channels and de-congealing channels.