Abstract: This disclosure relates to a fin structure including a main body and at least one minor structure. The main body includes a main plate and two side plates. The main plate has at least one through hole. The two side plates are respectively connected to two opposite sides of the main plate and protrude from the main plate. The at least one minor structure protrudes from the main plate and is located at a side of the main plate. The at least one minor structure is spaced apart from the two side plates. The at least one minor structure partially covers the at least one through hole. The at least one minor structure has a length, in a longitudinal direction of the main plate, less than a length of the at least one through hole of the main plate.

Abstract: A heat exchanger includes first and second sets of parallel arranged tubes. The first set of tubes extends along a first arcuate path, the second set of tubes extends along a second arcuate path, and each one of the second set of tubes is aligned in a common plane with a corresponding one of the first set of tubes. Corrugated fin segments are arranged in spaces between adjacent tubes, and crests and troughs of the corrugated fin segments are joined to broad and flat faces of the tubes. In making the heat exchanger, the material of the corrugated fin segment is intermittently slit to define breaking points prior to arranging the corrugated fin segment between the tubes.

Abstract: A method of rebuilding a salvaged EGR coolers is disclosed in which the existing heat exchanger elements are removed from the salvaged stock EGR cooler housing and replaced with a heat exchanger element made from a pair of heat exchanger tube sub-assemblies. Each of the heat exchanger tube sub-assemblies includes an end plate with a selected number of attached tubes and a selected number of bores, which are adapted to receive the ends of the tubes attached to the other tube sub-assembly. The tube sub-assemblies are mated together with the free ends of the tubes received into the bores of the opposite end plate. Exhaust fittings are then welded to the ends of the housing.

Abstract: Disclosure relates to an accumulator heat exchanger. The accumulator heat exchanger is capable of guiding only a gas-phase refrigerant to a compressor by allowing a high pressure refrigerant passing through a condenser to pass through an accumulator and to be heat exchanged with a low pressure refrigerant, thereby promoting evaporation of a liquid-phase refrigerant.

Abstract: Provided is a method of producing a liquid-cooled jacket wherein deformation of a seal body can be minimized.

Abstract: The disclosure presents a heat exchanger having flat tubes received in a double header plate. The double header plate includes a complementary arrangement of a main header plate and a reinforcement header plate. Slots are arranged in one of the header plate and complementary tabs are arranged in the other header plate. The tabs are configured to engage the slots to enable a complementary alignment of the two header plates.

Abstract: A heat exchanger includes a plurality of plate-shaped fins arranged at intervals such that air flows between adjacent fins, each of the fins having insertion holes and a plurality of flat tubes extending through the fins such that a refrigerant flows through the tubes in a stacking direction of the fins, each flat tube having a cross-section having straight long sides and half-round short sides, each flat tube having long-side outer circumferential surface parts and a short-side outer circumferential surface part in contact with the fin and covered with the brazing filler metal. The fins and the flat tubes are joined with the brazing filler metal covering the outer circumferential surfaces of the flat tubes such that top part of each fin collar of each fin is in contact with the flat tube and base part of the fin collar is spaced apart from the flat tube.

Abstract: An EGR cooler for an engine. The cooler has a housing with fittings on opposite ends for securement to mating fittings in the engine exhaust system to circulate exhaust through heat exchange tubes in the housing. Coolant inlet and outlet fittings compatible with mating fittings in the engine receive coolant and circulate the coolant in heat exchange relationship with the exhaust gas in the tubes. The cooled gas is then directed to the engine intake manifold to reduce emissions. A method of rebuilding salvaged EGR coolers is also disclosed in which the existing heat exchange components are removed from said salvaged stock EGR cooler and replaced with heat exchange tube sub-assemblies. Exhaust fittings are then welded to the ends of the housing.

Abstract: A method of manufacturing a heat transfer plate includes: an insertion process of inserting a heat medium pipe in a concave groove formed in a bottom face of a lid groove open to an obverse of a base member; a lid groove closing process of arranging a lid plate in the lid groove; and a main joining process of moving a main joining rotation tool along butt portions (V1, V2) between sidewalls of the lid groove and side faces of the lid plate, wherein in the main joining process a plastic fluidizing material (Q), where the base member and the lid plate are fluidized due to frictional heat, is made to flow in air gap portions (P1, P2) formed around the heat medium pipe.

Abstract: A method for a production of a heat exchanger for an inline measuring device includes the steps of: producing first opening provided for the connection of the heat exchanger to a temperature control piping system in a first sheet part serving for the production of one of the heat exchanger sheets; laying the first sheet part on a second sheet part serving likewise for the production of one of the heat exchanger sheets; producing an edge connection seam and inner connection locations by welding of the two superimposed sheet parts; introducing fluid through a first opening into a chamber remaining between the two sheets; superimposing a static pressure on the fluid in the chamber which exceeds a static pressure of a surrounding atmosphere to such a degree that an expansion of the chamber is initiated; and plastically deforming material of the thinner of the two sheet parts by expanding the chamber by means of the fluid with superimposed pressure.

Abstract: An electrical heating includes a plurality of electrical heating elements which are held by a housing and which abut heat conducting surfaces over which a medium to be heated flows. The electrical heating elements comprise contact lugs, arranged essentially at the same height, that are connected through a plate element. The plate element includes conductive paths and contact lug receptacles for the contact lugs. The plate element may include a carrier plate of non-conducting material and a stamped out metal plate that are joined together to form one unit. A method of manufacturing a plate element of this nature includes manufacturing the carrier plate by injection moulding and subjecting a metal plate to stamping operations to form area elements which are joined together by connecting ridges and in which the contact lug receptacles are located. The carrier plate and the metal plate are then joined, and the connecting ridges are then parted.

Abstract: A panel system has an insulating material with a first channel disposed over a surface of the insulating material. A transporter is disposed over the first channel. A thermal transfer medium is disposed over the surface of the first panel to attain desired surface characteristics. The first panel includes a second channel intersecting the first channel. A second panel includes a second channel. The first panel is adjacent to the second panel. The first and second channels of the adjacent first and second panels are aligned. The transporter is disposed over the first and second channels. The first and second panels are mounted over a mounting surface. Keyways are formed in the channels. Retention clips are disposed over the keyways. Panels include panel wings with hinges mounted over the panel wings. The thermal transfer medium includes graphite. The transporter includes tubing.

Abstract: Apparatus and methods for use with a baffle support fixture for a machine assembly of the tubes and baffles in a bundle assembly of a shell and tube type heat exchanger. The bundle comprises tubes inserted through baffles. The bundle is assembled using a holding fixture that includes anti-rotational features to secure baffles in a desired orientation. Following assembly, the bundle assembly is temporarily fixtured using pressure applying means such as plates and rods, and is then permanently affixed using an adhesive composition. After adhesive is applied, bundles, with the pressure applying means still attached, are preserved on racks and heat treated to cure and permanently set the adhesive.

Abstract: A pipe expansion method capable of reducing an inspection range (area) of a heat-transfer pipe secured to a pipe plate and capable of shortening the time required for inspection is provided. In a pipe expansion method for securing a heat-transfer pipe inserted in a pipe hole of a pipe plate by expanding the pipe, after tightly fitting an outer circumferential surface of the heat-transfer pipe to an inner circumferential surface of the pipe hole from a primary-side end face to a secondary-side end face of the pipe plate, surface pressure between the heat-transfer pipe and the pipe plate is further increased in a predetermined range from the secondary-side end face, or close to the secondary-side end face, towards the primary-side end face.

Abstract: A method is provided to use a bending support to manufacture a heat exchanger assembly. The method includes the steps of providing a bending support having a bracing member, affixing a refrigerant conduit onto the bracing member, inserting the refrigerant conduit and the bending support into a manifold header, positioning the manifold onto work a surface of a mandrel, such that bracing member of the bending support is substantially perpendicularly to the work surface of the mandrel, and bending the manifold onto the working surface of mandrel forming an inner radius of bent, such that the bracing member supports the inner diameter of the manifold header, thereby preventing the deforming of the inner radius of the bent manifold header.

Abstract: In a method of manufacturing a heat exchanger tube sheet sealing elements are arranged on respective ends of heat exchanger tubes. Said ends of the heat exchanger tubes having the sealing elements are arranged at predetermined positions in a mould. Said ends of the heat exchanger tubes are sealed such that a tube sheet material to be casted in the mould does not enter the heat exchanger tubes during casting of the tube sheet material. A tube sheet material is casted in the mould for covering the sealing elements. The tube sheet material is hardened in the mould.

Abstract: Systems and methods for improving heat exchangers by implementing self-energizing seals. In one embodiment, a U-tube heat exchanger includes a shell enclosure, a tube sheet, a closure and a set of tubes welded to the tube sheet. The tube sheet separates first and second chambers from a third chamber in the shell enclosure. The closure seals the first and second chambers. Each tube extends from the first chamber, through the third chamber to the second chamber. The improvement comprises a seal between the shell enclosure and either the closure or the tube sheet. The seal includes conically tapered sealing surfaces on the shell enclosure and closure or tube sheet which form a wedge-shaped gap. A seal ring having surfaces complementary to the sealing surfaces of the shell enclosure and closure or tube sheet is positioned between the sealing surfaces to form a self-energized seal.

Abstract: The present invention relates to a heat sink of a large area, in which a heat-dissipating body is further provided in its limited space. The method for manufacturing a fin includes the steps of providing a fin, cutting the fin to form a foldable piece thereon, folding back the foldable piece to be overlapped on the fin and form an accommodating hole, and punching the folded piece and the fin to form two overlapped through-holes. The fin, the heat-dissipating body and heat pipes are assembled together to obtain the heat sink. Since the fins and the heat-dissipating body dissipate the heat of the heat-generating element simultaneously, the heat-dissipating efficiency of the heat sink can be improved.

Abstract: A method of manufacturing a heat transfer plate (1) includes: an insertion process of inserting a heat medium pipe (16) in a concave groove (8) formed in a bottom face of a lid groove (6) open to an obverse (3) of a base member (2); a lid groove closing process of arranging a lid plate (10) in the lid groove (6); and a main joining process of moving a main joining rotation tool (20) along butt portions (V1, V2) between sidewalls (5a, 5b) of the lid groove (6) and side faces (13a, 13b) of the lid plate (10), wherein in the main joining process a plastic fluidizing material (Q), where the base member (2) and the lid plate (10) are fluidized due to frictional heat, is made to flow in air gap portions (P1, P2) formed around the heat medium pipe (16).

Abstract: A method of manufacturing an optimized sheet metal (1) of a zirconium based alloy is described, which optimized sheet metal (1) defines a sheet plane (BA). The method comprises the steps of providing a sheet metal (2) of a zirconium based. alloy, subjecting the sheet metal (2) to at least a preparing cold rolling and a final cold rolling, wherein the preparing cold rolling and the final cold rolling are both performed in a common rolling direction, and heat treating the sheet metal (1) between the preparing cold rolling and the final cold rolling so that the zirconium based alloy is partially re-crystallized. A method of manufacturing a spacer grid using an optimized sheet metal (1) according to the invention is also described.

Abstract: A method of manufacturing a heat sink includes, firstly, providing a plurality of fins each having a head and a body extending from the head, providing a base having a plurality of studs protruding from a top surface thereof, and providing a cover defining a plurality of recesses in a bottom thereof for receiving the heads of the fins and a plurality of orfices for receiving the studs. Next, the cover and the base are pressed to sandwich the heads of the fins therebetween. Then the studs of the base are punched to expand the studs and cause the studs to intimately engage with the cover.

Abstract: A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.

Abstract: A baseboard radiator element is formed of an aluminum tube and fins or vanes of aluminum sheet. An elongated strip of sheet aluminum is bent into a fin assembly of generally rectangular fins alternating with spacer members, with the fins having central apertures. The fin assembly is placed into a fixture and the tube is forced through the aligned apertures to create strong mechanical and thermal contact between tube and fins. The fin structure can be used with center tubes of other materials. A brass or steel connector insert is fitted into the end of the aluminum tube, and the end of the tube is deformed inward using a collet or jaw device to create a hermetic seal with the tube. The process can also be used for joining aluminum tubing to tubing of aluminum or other materials.

Abstract: The present invention is a method for fabricating a thermal spreader. The method may include laminating a plurality of layer portions together to fabricate a mechanically flexible substrate. The method may further include providing an internal channel within the mechanically flexible substrate, the internal channel configured for containing an electrically-conductive liquid, the internal channel being further configured to allow for closed-loop flow of the electrically-conductive liquid within the internal channel. The method may further include integrating a pump with the mechanically flexible substrate. The method may further include fabricating a plurality of rigid metal inserts. The method may further include forming a plurality of extension portions on a surface of each rigid metal insert included in the plurality of rigid metal inserts. The method may further include connecting the plurality of rigid metal inserts to the mechanically flexible substrate.

Abstract: In a method of manufacturing heat radiating fin, the technique of plastic working, such as stamping, is employed to apply an external force against a sheet metal material serving as a raw material for forming the heat radiating fin, so that the sheet metal material generates plastic deformation to form a plurality of recessed portions on a front side thereof. Meanwhile, a plurality of protruded portions is correspondingly formed on a rear side of the sheet metal material behind the recessed portions. Any two heat radiating fins so manufactured may be easily stacked and connected together with the protruded portions on a rear or higher heat radiating fin partially extended into the recessed portions on a front or lower heat radiating fin.

Abstract: This invention relates to an apparatus, comprising: a plurality of plates in a stack defining at least one process layer and at least one heat exchange layer, each plate having a peripheral edge, the peripheral edge of each plate being welded to the peripheral edge of the next adjacent plate to provide a perimeter seal for the stack, the ratio of the average surface area of each of the adjacent plates to the average penetration of the weld between the adjacent plates being at least about 100 cm2/mm. The stack may be used as the core assembly for a microchannel processor. The microchannel processor may be used for conducting one or more unit operations, including chemical reactions such as SMR reactions.

Abstract: A method and equipment for making a needle-fin tube having needle-like external fin parts, and internal fin structure formed by a spiraled spring wire which expands to clamp again the tube in the needle-fin tubes. The wire used to form the internal fin is wound along and around a bar which is moved and rotated along a straight line. The bar is moved inside the needle-fin tube from its one end to the other and the wire is released from the bar to attach to the internal surface of the needle-fin tube under spring force.

Abstract: An improved hairpin expander machine equipped with a closed-loop-controlled hydraulically positioned bolster plate and a heat exchanger-holding fixture characterized by a full-length, continuous front plate, back plate, and side rails. The hairpin expander includes a novel heat exchanger bottom end plate clamping mechanism as part of the fixture. These features enable the hairpin expander to provide larger expansion ratios and exert greater forces with tighter control, which is required for producing heat exchangers with reduced diameter hairpin tubes according to a preferred embodiment of the invention.

Abstract: According to a preferred embodiment, an improved method and apparatus for manufacturing tube and fin heat exchangers that includes a step for reducing the outer diameter of stock tubing to a value well below nominal prior to bending the tubing into hairpins. The reduced diameter increases the stiffness of the resultant hairpins and allows for efficient lacing of the heat exchanger fins and end plates. The method uses pre-size rollers that are adjustable for reducing the diameter of the tubing. The invention also includes a hairpin and heat exchanger manufactured according to the method.

Abstract: A method for the production of heat exchangers (10, 110, 210) of the so-called plate type, comprising the operative steps of: —juxtaposing a couple of substantially identical metal plates (12, 14), —fixing together said juxtaposed plates (12, 14) to one another by means of welding performed at respective perimetric sides (13a, 13b, 13c, 13d), —further fixing together said juxtaposed plates to each other by means of a plurality of welding tracts (22), arranged in at least two alignments, parallel and adjacent to a couple of opposite perimetric sides (13a, 13c) of the plates themselves (12, 14), and at a pre-established spaced relationship from said sides, —introducing a fluid under pressure between said juxtaposed metal plates (12, 14), to form a hollow, substantially box-shaped body (17), in which an internal chamber (16) and two substantially tubular passages (16a, 16b), formed between said couple of opposite perimetric sides (13a, 13c) and the respective adjacent alignments of the welding tracts (22), are d

Abstract: A thermal spreading device disposable between electronic circuitry and a heat sink includes a substrate having parallel first and second faces and conduits extending through the substrate between the faces. The substrate material has a first thermal conductivity value in a direction parallel to the faces and a second thermal conductivity value in a direction normal to the faces, with the second thermal conductivity value being less than the first thermal conductivity value. The conduit material has a thermal conductivity value associated with it, with the thermal conductivity value being greater than the second thermal conductivity value of the substrate. One method of fabricating the thermal spreading device includes disposing a molding material radially about the rods and hardening the material. Other methods include press fitting and shrink fitting the rods into a substrate material.

Abstract: A thermal spreading device disposable between electronic circuitry and a heat sink includes a substrate having parallel first and second faces and conduits extending through the substrate between the faces. The substrate material has a first thermal conductivity value in a direction parallel to the faces and a second thermal conductivity value in a direction normal to the faces, with the second thermal conductivity value being less than the first thermal conductivity value. The conduit material has a thermal conductivity value associated with it, with the thermal conductivity value being greater than the second thermal conductivity value of the substrate. One method of fabricating the thermal spreading device includes disposing a molding material radially about the rods and hardening the material. Other methods include press fitting and shrink fitting the rods into a substrate material.

Abstract: The invention is to provide a method for planishing a sealed end of a pipe body for making a heat pipe. According to a preferred embodiment of the method of the invention, the sealed end of the pipe body is fixed within a female mold. Then, a male mold is inserted into the pipe body. By use of the male mold, the sealed end of the pipe body with respect to the female mold is stamped to form a planished surface at the sealed end of the pipe body. Whereby after the heat pipe is finished, an electronic device is capable of being mounted on the planished surface at the sealed end of the heat pipe.

Abstract: A method for assembling a plurality of tubes to a tubesheet. A first end of each of the tubes is situated over a corresponding support rod that extends from a pattern block of the fixture. A first end of a plurality of locating members is inserted into a second end of each of the tubes such that a second end of the locating member extends from the tube second end. The tubesheet is then slid over the locating members and tubes such that each of a plurality of holes in the tubesheet receive corresponding ones of the tubes.

Abstract: A method for manufacturing an isothermal plate includes the steps of preparing a plurality of heat pipes, a first plate body and a second plate body; pressing on the second plate body to form a plurality of shielding covers recessed into the bottom surface of the second plate body and protruding from the top surface of the second plate body, the recessed portion of each shielding cover having a cambered space for horizontally accommodating the heat pipe therein; disposing each heat pipe into each cambered space to make the first plate body adhered to the bottom surface of the second plate body and the two plate bodies overlapped with each other; and applying an external force to the second plate body to bring each heat pipe into a tight and planar contact with the inner wall of its corresponding cambered space in the direction of pressing.

Abstract: A heat exchanger for thermally coupling a first fluid and second fluid is disclosed. The heat exchanger comprises plates comprising cores of thermally conductive graphite foam. A plurality of conduits for conveying the first fluid is formed in each core. Each plate further comprises thermally conductive barriers that sandwich the core, wherein the barriers are substantially impervious to r the first fluid and second fluid. Plates are stacked in a frame such that the frame and plates collectively define a plurality of channels for conveying the second fluid. Heat is exchanged between the primary fluid and the secondary fluid through the graphite-foam cores and barriers. Heat exchangers in accordance with the present invention can be lighter, have improved ratio of heat transfer surface density to heat exchanger volume, be lower cost, and/or be smaller for a given heat transfer capability than prior-art heat exchangers.

Abstract: A method for connecting a heat-dissipating body and a heat pipe and the structure thereof are used to improve the efficiency of heat conduction. The structure includes a heat-dissipating body and a heat pipe. The central position of the heat-dissipating body is provided with an accommodating trough for accommodating the heat pipe. A plurality of corresponding slots extends outwardly from the periphery of the trough. The other end of the slot is connected to a through hole. Tools are disposed in the slots to widen the slots and thus the periphery of the trough, so that the inner diameter of the trough is larger than the outer diameter of the heat pipe. After the heat pipe penetrates into the trough, the tools are removed, so that the inner wall surface of the trough abuts tightly against the outer circumferential surface of the heat pipe. Thus, the optimal efficiency of heat conduction between the heat pipe and the heat-dissipating body can be achieved.

Abstract: A heat sink for integrated circuits is limited substantially to heat transfer fins on one or more heat pipe tubes, the tube(s) functioning as a base for the heat sink. The heat pipe tube has a flattened oval cross-section and can snap-fit in openings through the fins. The tube is exposed on one side of the heat sink for contact with the heat generating circuit. The fins can be flat or irregular and can have a collar engaging the heat pipe tube. In one example, the heat pipe runs perpendicular to vertical fins along the bottom of a standing fin stack. In another embodiment two U-shaped heat pipe tubes carry a layered stack, the bottom of the U-shapes being presented under the lowermost in the stack. A clamp urges the heat sink against the heat source.

Abstract: A method for forming heat exchanger plates (10) comprises formation of a fluid flow channel (28) along the edges (22) of a sheet metal strip or blank, and formation of a pair of raised end bosses. The raised end bosses (32) are elongated in the longitudinal dimension and are formed within the final width dimension of the plate so as to avoid the need for trimming of excess material along the edges of the plate. The method generates less scrap than prior art processes using progressive stamping, and also permits variation of the plate lengths.

Abstract: Cold plate apparatuses and methods of fabrication are provided for facilitating cooling of an electronics component. The fabrication approach includes: forming a tube with a first metal and having first and second ends with a heat transfer region disposed therebetween; positioning the heat transfer region of the tube within a mold and casting a heat sink member around the tube by contacting a second metal in molten form over the tube, wherein the first and second metals react peritectically to form an alloy layer between the tube and the heat sink member, and a metallurgical bond is formed between the tube and heat sink member with cooling of the molten second metal; and controlling casting of the heat sink member to minimize a thickness of the alloy layer to enhance a heat transfer characteristic of the metallurgical bond formed between the tube and the heat sink member.

Abstract: A heat exchanger and a method for fabricating the heat exchanger are disclosed. The heat exchanger comprises a heat exchanger core that is formed from a plurality of stacked aluminum panels that are joined together via friction stir welding. Each panel in the core is formed from at least two aluminum extrusions that are joined to one another via friction stir welding.

Abstract: In a heat plate having a hollow plate and capillary supporting structures, the plate body includes a capillary tissue attached on an internal wall of the plate body, and each of the capillary supporting structures is erected, supported and distributed in the plate body. Each capillary supporting structure is in a cylindrical shape and has a capillary object made of sintered powder and disposed on the circumferential surface of the cylindrical capillary supporting structure and contacted with the capillary tissue to form a continuous capillary channel and provide a capillary action to the capillary supporting structures in the heat plate.

Abstract: A gear pump having an inner rotor and an outer rotor is covered by a cylindrical outer casing and side casings. The cylindrical outer casing has two outer circumferential edges which are welded over the entire circumference thereof to the outer edges of the side casings, respectively. The outer casing has two angularly spaced recesses in its inner periphery for receiving slide seals therein. Welding is started at a welding start point which is 90 degrees spaced from the middle point between two recesses. During welding, welding energies are applied to the welding start point and the middle point between two recesses. Those energies tend to deform the casing into oval shapes that are 90 degrees out of phase from each other. Thus, these energies cancel each other, thereby preventing the casing from being deformed.

Abstract: A tube expanding apparatus includes mandrels, each mandrel having a billet on a leading end; a reciprocating actuator for supporting rear ends of the mandrels, the reciprocating actuator being supported to reciprocate in an axial direction of hairpin tube straight portions; a pressure cylinder for raising and lowering the reciprocating actuator and expanding the straight portions by pressing the billets into the hairpin tube straight portions; hairpin receivers for supporting curved portions of hairpin tubes; a fin receiver for supporting a lower end portion of the laminated radiating fins; and a hydraulic cylinder for raising and lowering the fin receiver in the axial direction of the hairpin tube straight portions. The hydraulic cylinder lowers the fin receiver to a predetermined position as the mandrels descend and the billets begin to be inserted into the hairpin tubes.

Abstract: A method of manufacturing a heat dissipating device, the method includes steps: a) affording a heat pipe, a solid solder bar and a heat sink, wherein the heat sink includes a base defining a groove at a side thereof; b) placing the solder bar and the heat pipe, in turn, into the groove of the heat sink; c) heating to melt the solder bar and simultaneously pressing the heat pipe to have an outer surface of the heat pipe coplanar with said side where the groove is defined; and d) cooling to achieve the heat dissipating device wherein the solder bar is evenly distributed between the heat pipe and the base.

Abstract: A wrought aluminum sheet product having a textured surface for improved heat transfer properties. A plurality of textured features having dimensions of about 1-50 microns is roll textured onto one or both sides of the sheet. The aluminum sheet may be used as the fins or tubing of a heat exchanger.

Abstract: A heat sink base (10) includes a rectangular body (11) made of aluminum and a circular core (12) made of copper. The body defines a circular through opening (111). A diameter of the opening is slightly less than a diameter of the core. The core is attached within the body according to the following steps: a) pressing the core into the through opening of the body; b) stamping the core to cause it to plastically deform in radial directions and thereby become firmly combined with the body; and c) removing any burring of the core flowing out from the opening such that surfaces of the core and the body are coplanarly smooth.

Abstract: A heat exchanging tube assembling apparatus is adapted to a heat exchanger having an outer casing in which is arranged a partition plate formed with holes through which heat exchanging tubes, each having a U-shape in outer appearance, are inserted from an open end side of the casing in a full automatic manner. The heat exchanging tube assembling apparatus includes a tube grasping device for grasping a plurality of U-shaped tubes in a group at a working position, a tube positioning device for positioning the grasped tubes to positions from which the U-shaped tubes are inserted into the holes formed to the partition plate, a tube taking-out device for sequentially taking out one by one the U-shaped tubes grasped by the tube grasping device, and a tube feed device for feeding the taken-out tubes toward the partition plate and inserting the tubes into the holes of the partition plate.

Abstract: An assembly of multiple heat sink fins is comprised of multiple fins overlapped on one another and penetrated through by a heat conducting tube, each fin being provided at where close to the edge of the fin with a hole in a diameter slightly smaller than the outer diameter of the conducting tube to receive insertion of the conducting tube; an opening connected through the hole being formed on the edge of the fin; and the fin allowing the conducting tube being compressed into the hole through the opening as a clamp ring to secure the fin to the tube.

Abstract: A heat exchanger (10) comprising a plurality of plastic tubes (12) arranged in a series of mutually parallel rows and a pair of plastic collector plates (14) bonded to the respective ends of the said tubes (12). Each collector plate (14) is formed by a plurality of plastic terminal elements (22), each of which has at least one set of semicircular seats (24 and 26) suitable for receiving the ends of a row of tubes (12). The said semicircular seats (24 and 26) of each terminal element (22) are separated from each other by bonding portions (28 and 30) suitable for welding to the corresponding bonding portions of a complementary terminal element along a welding plane (34).