Abstract: The invention generally relates to a flexible heal exchanger comprising a pair of flexible multilayer thermoplastic polyimide films each of which comprises an aromatic polyimide substrate film showing no glass transition temperature or a glass transition temperature of 340° C. or higher and a thermoplastic aromatic polyimide surface film showing a glass transition temperature in the range of 190 to 300° C. in which the surface films of the flexible multilayer thermoplastic polyimide films face each other and are in part fused together, whereby producing between the flexible multilayer thermoplastic polyimide films a conduit pattern through which a fluid passes. The flexible multilayer thermoplastic polyimide films preferably have a thickness in the range of 10 to 125 ?m and comprise a linear expansion coefficient of MD, a linear expansion coefficient of TD and an average of linear expansion coefficients of MD and TD, in the range of 10×10?6 to 35×10?6 cm/cm/° C. at 50-200° C.

Abstract: A microchannel heat sink is manufactured from graphite materials. A heat sink member has at least a first thermal contact surface for making thermal contact with an electronic device. The heat sink member is constructed of at least a first sheet of compressed particles of exfoliated graphite, the first sheet having two major surfaces. At least one of the major surfaces has a first plurality of microchannels formed therein for carrying coolant fluid. Said microchannels each have a length parallel to one of said major surfaces and have a cross section normal to said length. The cross-section has at least one dimension below about 1000 microns.

Abstract: A method for manufacturing plate stacks for the production of coolers, cooler elements or heat sinks made of at least one plate stack for cooling electric or opto-electric components. The process includes the manufacture of plates or boards of metal, stacking the plates to form a plate stack, joining of the plates with the application of heat and pressure to form a stack, and post-treatment of the plate stack.

Abstract: A method of manufacturing a finned heat sink included obtaining a fin core, wherein the fin core is constructed of a conductive structural graphite-epoxy material. A fin cover is secured to the fin core using one of heat and pressure to define a heat sink fin, wherein the fin cover is constructed of a foil material.

Abstract: A fluid passing flat hollow body 2 comprises an upper and a lower flat plate 15, 16 elongated laterally and spaced apart as positioned one above the other, and a channel forming body 17 interposed between and brazed to the two flat plates 15, 16.

Abstract: A heat exchange panel for use in an active heat exchange system. The heat exchange panel includes first and second layers having seals between the layers at a common border, at fences, and at dots of a dot matrix. The dot matrix is organized into first parallel lines and second parallel lines where the first and second parallel line cross at a 90° angle. The seals at the border and the fences are rippled with smooth ripples.

Abstract: A low-cost, high-temperature heat exchanger is made from a notched piece of metal, the metal being folded back and forth upon itself to form a monolith. The notches in the metal piece create openings, communicating with distinct sides of the monolith. Ducts are attached to the openings. Cut pieces of corrugated metal, which may have a catalyst coating, are inserted between folds of the monolith. The heat exchanger may be used as part of a fuel cell system, or in other industrial applications, to recover waste heat, or to conduct various catalytic and non-catalytic reactions. The invention also includes an element, or building block, for a high-temperature heat exchanger, including a folded metal monolith with metal combs inserted, the monolith and the combs defining seams which are hermetically sealed.

Abstract: We combine superplastic forming (SPF) with adhesive bonding (AB) to produce quality multisheet sandwich panel structures, especially those using a superplastic aluminum alloy, such as A1 2004, A1 8090, or A1 1570. We produce the parts with improved energy efficiency and at lower cost. We heat the multisheet pack having an adhesive, preferably a polyimide, between the core sheets and the face sheets to its superplastic forming range. Then, we superplastically form the pack to define adhesive bonds between the sheets in the core and between the core and the face sheets with the flowing adhesive. Finally, we cool the formed pack below the superplastic range to set the adhesive.

Abstract: Disclosed herein is a plate-shaped heating panel having connecting members fastened to each other by means of bolts and nuts. The heating panel comprises upper and lower plates integrally formed to face each other so as to form an inner fluid pathway in which heating water flows, a plurality of connecting members, each symmetrically extending from the upper and lower plates toward the lower and upper plates, respectively, and connecting the upper and lower plates to each other, the inner fluid pathway formed inside of the plate by means of the plurality of connecting members, and two fluid communication portions for supplying and discharging the heating water, wherein one or more connecting members adjacent to the fluid communication portions are punctured such that punctured portions of the connecting members are fastened to each other by means of bolts and nuts.

Abstract: A radiator core reinforcement self shears in the braze oven as strategically placed voids in the reinforcement erode away under the flowing action of the melted surface braze layer.

Abstract: In a method for manufacturing a stacking-type, multi-flow, heat exchanger, heat transfer tubes and outer fins are stacked alternately, each heat transfer tube being formed by connecting a pair of tube plates and including an inner fin therebetween. The manufacturing method includes the steps of disposing the tube plates so as to oppose each other, inserting an inner-fin forming material between the tube plates, stacking the tube plates with respect to each other so as to nip or seize the inner-fin forming material between the tube plates, and cutting the inner-fin forming material and end portions of the tube plates simultaneously. By this method, the time for required manufacturing heat transfer tubes may be reduced significantly, and the productivity of the heat exchanger may be increased significantly. The positioning of inner fins may be achieved with a high degree of accuracy.

Abstract: A method for riveting fins into a bottom plate of a heat dissipating device is disclosed. A punching device has a plurality of weights each of which is formed as a thin sheet. The punching device is installed to a fixture; a plurality of fins are spaced with a predetermined gap; and a bottom plate is formed with a plurality of trenches for receiving the fins. The method comprising the step of: positioning the bottom plate at the fixture; inserting the fins into the trenches of the bottom plate; inserting the weights of the punching device into the fins so that each space between two fins has a weight; and punching a backside of the bottom plate by a puncher so that as the bottom plate moves; the weights collides portions of the bottom plate between the fins to deform and rivet the fins into the bottom plate; and thus the fins are firmly secured in the bottom plate.

Abstract: A multi-layered adhesive sheet is provided, including a metal sheet and at least two thermosetting resin layers having different functions on at least one side of the metal sheet.

Abstract: This invention relates to a heat exchanger which is produced by connecting two walls together at a plurality of points by compression molding and sealing the edges thereof.

Abstract: We combine superplastic forming (SPF) with adhesive bonding (AB) to produce quality multisheet sandwich panel structures, especially those using a superplastic aluminum alloy, such as Al 2004, Al 8090, or Al 1570. We produce the parts with improved energy efficiency and at lower cost. We heat the multisheet pack having an adhesive, preferably a polyimide, between the core sheets and the face sheets to its superplastic forming range. Then, we superplastically form the pack to define adhesive bonds between the sheets in the core and between the core and the face sheets with the flowing adhesive. Finally, we cool the formed pack below the superplastic range to set the adhesive.

Abstract: The invention relates to a method for producing a plate heat exchanger from a plurality of heat exchanger blocks (1a, 1b). Each heat exchanger block (1a, 1b) has mounted on it a header (6a, 7a, 6b, 7b) which extends over at least part of one side of the heat exchanger block (1a, 1b). The heat exchanger blocks (1a, 1b) are arranged next to one another, and the headers (6a, 6b; 7a, 7b) of two adjacent heat exchanger blocks (1a, 1b) are provided on their mutually confronting sides with orifices and are connected to one another in such a way that a flow connection occurs between the two headers (6a, 6b; 7a, 7b).

Abstract: A heat exchanger for realizing a high degree of humidity exchange efficiency at a low cost. The heat exchanger in which partition members respectively separated from each other by a spacing maintained by one of spacing members facilitate circulation of two different air flows, with total enthalpy heat exchange occurring between these two air flows via the partition members. The partition members comprise an air shielding sheet type material comprising a hydrophilic fiber and also including a moisture absorbent, and the air permeability (JIS P 8117) of the partition members is at least 200 seconds/100 cc.

Abstract: A construction of recuperator core segments is provided which insures proper assembly of the components of the recuperator core segment, and of a plurality of recuperator core segments. Each recuperator core segment must be constructed so as to prevent nesting of fin folds of the adjacent heat exchanger foils of the recuperator core segment. A plurality of recuperator core segments must be assembled together so as to prevent nesting of adjacent fin folds of adjacent recuperator core segments.

Abstract: A construction of recuperator core segments is provided which insures proper assembly of the components of the recuperator core segment, and of a plurality of recuperator core segments. Each recuperator core segment must be constructed so as to prevent nesting of fin folds of the adjacent heat exchanger foils of the recuperator core segment. A plurality of recuperator core segments must be assembled together so as to prevent nesting of adjacent fin folds of adjacent recuperator core segments.

Abstract: A heat exchanger is manufactured by assembling a bundle of pipes to a pair of header tanks by inserting the ends of the pipes into corresponding holes in the header tanks. The ends of the pipes include a brazing material. The assembled heater core is placed into an adapted enclosure, and heated, for example, by induction or laser heating, to a temperature above the melting temperature of the brazing material to mechanically fix the ends of the pipes to the holes. Subsequently, the heater is switched off and the heat exchanger is cooled within the enclosure.

Abstract: A method for producing a cast/sheet-metal composite body, comprising the following steps: provide a casting mold (12), place at least one sheet-metal part (11) in the casting mold (12), produce a cast part (2) interconnected with the at least one sheet-metal part (11), and apply pressure to the at least one sheet-metal part (11) to form a hollow space (8).

Abstract: Multi-layer material based on expanded graphite reinforced by a metal comprising at least one inner layer (10) of recompressed expanded graphite and two outer metal layers (20), the said recompressed expanded graphite having a density greater than 1.6 g/cm3. The thickness of each outer metal layer (20) is less than one tenth of the total thickness of the multi-layer structure. The outer metal layers (20) are advantageously provided with uniformly distributed pins (21) oriented towards the recompressed expanded graphite inner layer (10), the density of the said pins (21) being greater than 25 per dm2 and their height being greater than 15% of the final thickness of the recompressed expanded graphite inner layer (10). The said pins may be the result of punching of the outer metal layer (20), the wall around the perforated orifice being deformed and in the form of a substantially axisymmetric projection.

Abstract: An oil cooler is held by holding plates. Top portions of side pieces of each holding plate are disposed through a side wall of a tank and are bent at the outer surface of the tank, so that circular interposed members and the oil cooler are retained by being sandwiched between middle supporter pieces of the holding plates and the side wall of the tank in the stacking direction of element units such that the oil cooler is movable in the longitudinal direction with respect to the side wall of the tank. By inserting connecting pipes of the oil cooler through openings of the tank so as to temporarily assemble the connecting pipes into openings of a tube plate, blocking flanges of the connecting pipes are retained while being in contact with the outer surface of the side wall of the tank.

Abstract: A pair of brazed sheets or plates having abutting portions through which aligned openings are formed, the opening through one sheet being larger than the opening through the other.

Abstract: A plate heat exchanger includes a plurality of plates sandwiched between a pair of end plates. Each of the plurality of plates has two passageways defined therein that are not in fluid communication with each other. Alternatively, some of the plurality of plates have a passageway, while some of the remaining plates have another passageway. Two fluids flow through the two passageways in a countercurrent fashion. Because the countercurrent flows are superior in heat transfer efficiency, it is possible to enhance the performance and reduce the size of the plate heat exchangers.

Abstract: An apparatus and method for cooling hot fluids, especially exhaust gases, with a multi-pass cooler core. The cooler core is particularly useful for cooling exhaust gases flowing in an exhaust gas recirculation (EGR) system or regime in operative association with an internal combustion engine, such as a diesel engine. Cooled gases are recirculated to the engine input to help reduce noxious exhaust emissions. The invention utilizes unequal areas-in-flow between the first exhaust pass through the core and the second and subsequent passes through the core. The first pass through the core features an area-in-flow comparatively larger than the area-in-flow of the second pass. The difference in areas-in-flow between passes influences gas velocities to reduce fouling, despite changes in exhaust gas temperature between passes through the core.

Abstract: An evaporator core for the climate control system of a motor vehicle formed from alternating pairs of plates. Each pair of plates includes two plates having a similar configuration engaged together and a mirrored, back-two-back relationship. Each of the plates includes at least one inlet aperture, an outlet aperture, and a return aperture. The structure of the plates and the arrangement of stacking produce an evaporator having a plurality of fluid pathways. Fluid is directed in alternating directions in adjacent pathways.

Abstract: The invention relates to a louvered fin for a heat exchanger. This louvered fin includes (a) a first corrugated strip having planar and connecting portions that are alternately arranged to make a corrugation, the first corrugated strip extending straight in a longitudinal direction; (b) first louvers formed in each planar portion such that the first louvers are arranged in a lateral direction, the first louvers in each planar portion being configured to be in asymmetry in the lateral direction; (c) a straightening member for keeping the first corrugated strip in a straight shape in the longitudinal direction, the straightening member extending along a longitudinal side of the first corrugated strip; and (d) a first bridge member for attaching the first corrugated strip and the straightening member together.

Abstract: When constructing a steam generator, buckstay modules are joined with tube wall units to form buckstay and tube wall modules while the boiler steel structure is being erected, and they are temporarily placed within the boiler steel structure level by level. Then an external part of the boiler top main grid is constructed whose beams are flush with the tube walls of the buckstay and tube wall modules. Then the boiler wall is mounted by aligning and welding the individual tube wall modules from top to bottom. Simultaneously, the internal components are constructed on the boiler base and hoisted to installation height. Preassembling buckstay and tube wall modules eliminate the need for inserting buckstays or tube walls from above through the boiler top main grid. For this reason, the roof opening can be smaller than usual. The inner boiler top main grid therefore does not require its own main beams, which saves a substantial amount of steel.

Abstract: A method for producing a component out of stacked plates (9, 10) soldered to one another, into at least some of which recesses (11, 12, 13) are made, is proposed, in which at least one solder layer (8) is provided between the plates (9, 10) for a solder diffusion process. According to the invention, the plates (9, 10), with solder layers (8) between them, are stacked on one another and compressed in the cold state before the solder diffusion process. With this provision, the use of complicated pressing tools in the actual solder diffusion process is avoided.

Abstract: A method of forming a wound roll, such as a regenerator, including the steps of inserting wires at the lateral edges of an elongated strip as the strip is being wound around a spool. Spacers, such as localized bumps, are formed on the strip to space strip layers apart to form uniform gaps. An offset is added to the angle of rotation between each spacer-forming step to inhibit the nesting of bumps in the cavities of adjacent strip layers.

Abstract: A joint connecting consecutive sheets of etched regenerator foil for a spiral-wrapped regenerator of a regenerative gas cycle machine such as a Stirling cycle engine or Stirling, pulse tube, or Gifford-McMahon cryocooler. The joint comprises a multiplicity of tabs on the end of one sheet of regenerator foil interlocked with a multiplicity of tabs on the end of another piece of regenerator foil. The joint is no thicker than the original thickness of the sheets of etched regenerator foil that it connects together, and the tabs substantially fill the holes into which they are locked, minimizing undesirable leakage through the joint after it has been incorporated in a regenerator.

Abstract: In a method of manufacturing a plate type titanium heat exchanger in which a plurality of titanium herringbone plates are laminated and flow paths are formed between the respective herringbone plates, after brazing materials are charged or coated to the joints between the herringbone plates, respectively, the herringbone plates are placed in a vacuum heating furnace, subjected to vacuum degas processing while being gradually heated, and joined to each other by brazing by being more heated after a prescribed vacuum pressure has been obtained.

Abstract: A method for manufacturing a heat transfer member comprises the steps of: subjecting elongated materials to be worked, which are made of metallic thin sheets, to a continuous press forming utilizing a plurality of press-forming devices to form heat transfer faces each having a prescribed shape, while transferring the materials in a prescribed feeding direction, which is in parallel with a longitudinal direction of the materials; and welding two materials, which have been subjected to the press forming, of the elongated materials together utilizing a welding device to form a heat transfer member having substantially a tubular shape.

Abstract: A clamshell heat exchanger panel has a pocket formed in an edge of a land portion of the panel so that a fastener can be inserted into the pocket, with its axis in the plane of the heat exchanger panel. This allows attachments to be made directly to the exchanger panel without affecting the integrity of the gas-carrying conduit portion of the panel. The pocket is made by forming mirror image indentions in the land portions of the two sides of a sheet metal workpiece such that, when the two sides are folded together, the indentions cooperate to form the pocket. Openings can also be formed through the land portions of the two sides so that, upon a folding together, the openings define an opening into the pocket.

Abstract: A method of forming a heat exchanger stack from a plurality of plates, wherein the plurality of plates includes at least first and second nestable plates formed of an electrically conductive material. Each plate has a generally flat central portion and at least a pair of edge portions generally non-coplanar relative to the respective central portions of the plates. Each plate has a plurality of protrusions which is formed so that, when the plates are in a stacked, nested position, the respective pluralities of protrusions of the first and second plates engage each other, such that the respective central portions of the plates are spaced apart, thereby to define therebetween a space through which a heat exchanging medium may be passed.

Abstract: A process for economically forming and assembling heat exchangers is disclosed. The process begins with a roll of synthetic resin which is heated and then impressed with a series of alternating panels and hinges. The hinges are formed so as to provide for an accordion fold. The formed strip of material is then cooled, trimmed, measured and cut. Thereafter, the strip of material is folded in an accordion fashion. The folded core may be bonded or constrained so as to form two sets of fluid flow passages in an alternating manner. Depending upon the design of the panels formed in the strip of material, the cores will either be counterflow or cross flow. In addition, a housing is thermo formed and then assembled with the core to complete the heat exchanger.

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).

Abstract: A method of making a continuous corrugated heat exchanger includes stamping a plurality of contiguous refrigerant plates joined together by a plurality of tabs. The method includes the steps of stamping at least a first and last one of the refrigerant plates flat to form end sheets. The method further includes the steps of bending the refrigerant plates to form a stack and bending the end sheets over the refrigerant plates at a top and bottom of the stack.

Abstract: A sheet guiding device having a top plate formed with a smooth side facing towards sheets to be guided past the device, includes at least one depression defining at least one connecting region, the at least one depression being formed in the top plate from the smooth side thereof, and at least one rear element fastened to a rear side of the top plate and having at least one connecting portion assigned to the at least one connecting region, the at least one rear element bearing against the top plate and being connected thereto by laser weld seams forming a connection to the top plate at the at least one connecting region defined by the at least one depression, the at least one depression formed in the top plate being deeper than any deformation induced by the laser weld seams; and method of producing the device.

Abstract: Plate heat exchanger has heat transfer plates which exhibit a patterning and are stacked one above the other. Primary sided flow channels for a first heat exchanger medium to be evaporated, and secondary sided channels for a second heat exchanger heat carrier medium are formed between the plates. The primary sided and/or the secondary sided flow channels are formed between two adjacent heat transfer plates, whose patterning meshes at least partially, while maintaining a minimum spacing.

Abstract: A heat exchanger utilizing active fluid transport of a heat transfer fluid is manufactured with multiple discrete flow passages provided by a simple but versatile construction. The microstructured channels are replicated onto a film layer which is utilized in the fluid transfer heat exchanger. The surface structure defines the flow channels which are generally uninterrupted and highly ordered. These flow channels can take the form of linear, branching or dendritic type structures. A cover layer having favorably thermal conductive properties is provided on the structured bearing film surface. Such structured bearing film surfaces and the cover layer are thus used to define microstructure flow passages. The use of a film layer having a microstructured surface facilitates the ability to highly distribute a potential across the assembly of passages to promote active transport of a heat transfer fluid.

Abstract: An aluminum alloy fluid heat exchanger comprises first and second elongate, generally flat, aluminum alloy fluid heat exchanger tubes, each having an upper and a lower surface and having a fluid port inlet and a fluid port outlet. The first tube has a series of small protrusions formed at its lower surface and the second tube has a matching series of protrusions formed at its upper surface, the first tube being stacked on top of the second tube with the protrusions on the first tube in contact with the protrusions on the second tube. A thin sheet of a dissimilar metal, preferably cold rolled steel having a thickness of about 0.3 millimeters is installed between the protrusions on the first and second tubes. The protrusions provide a spacing of at least about 0.42 millimeters between major portions of the first and second heat exchanger tubes. A corresponding method of constructing an aluminum alloy heat exchanger is described.

Abstract: A radiator with thin fins and a method for manufacturing the radiator are provided. The method includes steps of forming a plurality of thin fins and spacers by punching metal sheets of high coefficient of heat transmission into predetermined shapes, spacing said thin fins alternately with said spacers and binding them into an assembly with a plurality of rivets extended through holes separately formed near lower end at predetermined positions, and grinding a bottom of the assembly to remove unevenness thereof. The radiator manufactured in this method may include increased number of fins within a limited area to create largely increased contact surfaces with air and thereby enables quick radiation of heat produced by, for example, chips associated with the radiator. A fan may be mounted to a top of the radiator to enhance the radiating effect.

Abstract: Heat exchanger header tanks are constructed from a basic set of components. The basic components are castings and simple formed sheet parts. The components are assembled to produce a heat exchanger tank having a desired size and geometry.

Abstract: A continuous corrugated heat exchanger and method of making same includes a plurality of contiguous plates and a plurality of tabs disposed between adjacent plates. The plates include a plurality of refrigerant plates having a plurality of beads and at least one blank plate at each end of the refrigerant plates forming an end sheet. The refrigerant sheets are folded bellows-like to form a stack and the end sheet is folded on a top and bottom of the stack and connected thereto.

Abstract: A heat exchanger element has at least two stacked metal sheets connected to one another such that flow channels are formed between facing sides of the metal sheets. The flow channels allow flow of a heat exchanger medium therethrough. The metal sheets are made of a reactive metal and are connected by electron beam welding in vacuum. The heat exchanger elements are manufactured by introducing at least two metal sheets into a hermetically sealed vacuum chamber and partially connecting by electron beam welding in vacuum the at least two metal sheets to one another to form an intermediate product. The intermediate product is further processed to build a heat exchanger element.

Abstract: A method of making a heat exchanger includes assembling one or more heat exchange cells. Each heat exchange cell is assembled by providing a top plate having an inlet aperture at one end thereof, an outlet aperture at the other end thereof, a first surface, a second surface and peripheral edges; and providing a bottom plate having an inlet aperture at one end thereof, an outlet aperture at the other end thereof, a first surface, a second surface and peripheral edges. The second surfaces of the top and bottom plates are juxtaposed with one another so that the inlet and outlet apertures of the plates are in substantial alignment with one another. The peripheral edges of the top and bottom plates are attached to form a high pressure chamber between the second surfaces of the plates. After being assembled, each individual heat exchange cell is tested before being attached to other heat exchange cells. The testing may include pressure testing of the heat exchange cell.

Abstract: A heat exchanger utilizing active fluid transport of a heat transfer fluid is manufactured with multiple discrete flow passages provided by a simple but versatile construction. The microstructured channels are replicated onto a film layer which is utilized in the fluid transfer heat exchanger. The surface structure defines the flow channels which are generally uninterrupted and highly ordered. These flow channels can take the form of linear, branching or dendritic type structures. A cover layer having favorably thermal conductive properties is provided on the structured bearing film surface. Such structured bearing film surfaces and the cover layer are thus used to define microstructure flow passages. The use of a film layer having a microstructured surface facilitates the ability to highly distribute a potential across the assembly of passages to promote active transport of a heat transfer fluid.

Abstract: The present invention relates to a method of manufacturing a heat shield and to a heat shield manufactured with this method. Heat shields of this type are particularly used in the field of the automobile industry. According to the method according to the invention, an insulating material, performed in a suitable contour and consisting of graphite, for example vermiculite, without binding agent, is inserted as an insulating plate (4) between two flat materials (2, 3), consisting of sheet metal, for example. The flat materials (2, 3) are then connected to one another at their edges in a positive or non-positive manner. The insulating material is here compressed, before or after being deposited on the flat material, to form a coherent insulating plate.