Abstract: A regenerator having a plurality of involute foils disposed in an annular gap between an inner cylindrical tube and an outer cylindrical tube. The involute shape of the foils provides uniform spacing throughout the entire regenerator and substantial surface area for fluid contact.

Abstract: According to the present invention, in constituting a heat exchange element having a stacked-layer structure in which sheet-like partition members added a moisture absorbent thereto and spacing members are stacked alternately, the spacing members being joined with the partition members so as to form air flow passages together with the partition members, each of the spacing members includes a plurality of section walls that divide a space between the partition member joined under the spacing member and the partition member joined on the spacing member into a plurality of flow passages, and one or more first section walls formed with holes that bring adjacent flow passages into communication with each other and one or more second section walls formed with no hole that brings adjacent flow passages into communication with each other are alternately arranged in each of the spacing members.

Abstract: According to the preferred embodiment, an improved method and apparatus for the manufacturing of an aluminum tube and aluminum fin heat exchanger that includes steps for pneumatic cleaning, thermal cleaning, and uncontrolled-atmosphere open-flame autobrazing of hairpins to return bend fittings. The method uses a tube lubrication system that is adjustable to control amount of lubrication applied to the tube prior to final expansion. The method uses a pneumatic coil cleaning station that is adjusted to reduce the residual oil particulate from the expansion process required to be thermally cleaned.

Abstract: A refrigerant leak-preventive structure in a heat exchanger is described. The refrigerant leak-preventive structure includes a tube group having refrigerant leak-preventive grooves recessed at ends of the fin-tubes group, and headers having refrigerant leak-preventive projections formed by double injection molding solution introduced into and cooled in the refrigerant leak-preventive grooves when being coupled with the both ends of the tube group by a double injection molding.

Abstract: In a heat exchanger, a core portion includes a plurality of plate fins each shaped like a flat plate and a plurality of tubes in which a fluid flows and each of which is inserted into each of the plate fins to be mechanically bonded thereto. Further, an end portion in a longitudinal direction of each of the tubes is bonded to a header plate which constructs a part of a header tank. The manufacturing method for this heat exchanger includes inserting the tube into the plate fins; expanding the tube to attach the plate fins; connect the tube into the header plate; and vibrate the tube with respect to the plate while applying a load to the tube in the direction of the header plate.

Abstract: A heat exchanger including a header having a plurality of header openings with rigid tubes that may be made of plastic are inserted in the openings. The tubes are sealed to the header to prevent leakage between the header and the tubes to prevent water and air leakage between the wet, scavenger air stream flowing through the tubes and a dry air stream flowing around the tubes. A method of making the heat exchanger includes providing the openings with a flange and uses an interference fit between the rigid heat exchange tubes and the header openings. A self-leveling sealant may be used to seal the heat exchanger tubes to the header using, for example, a paint roller and/or a paint sprayer.

Abstract: This invention provides a method for assembling the thermal module. According to the invention, the fin can be combined with a heat pipe and a joint material to form the thermal module. The fin includes a main body having a through hole and an feeding hole communicating with each other. The heat pipe passes through the through hole. The joint material is injected into the feeding hole to fill a clearance between the heat pipe and the inner wall of the through hole. In addition, when the fin is combined with the heat pipe, the feeding hole is above the through hole, the joint material flows downward along the clearance, and the clearance gradually narrows along a flowing direction of the joint material.

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 wound process element and method of assembly wherein at least one dimpling element is positioned between the outer perimeter of a wound element strip and an outer holding band.

Abstract: A method of forming a plurality of protrusions on the inner surface of a tube to reduce tube side resistance and improve overall heat transfer performance. The method includes cutting through ridges on the inner surface of the tube to create ridge layers and lifting the ridge layers to form the protrusions. In this way, the protrusions are formed without removal of metal from the inner surface of the tube, thereby eliminating debris which can damage the equipment in which the tubes are used.

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: A method of forming an insert for a catalytic converter includes wrapping a catalytic core with a fibrous packing, inserting the wrapped core into a mantle, and forming end portions of the mantle into converging tapered portions capable of retaining the wrapped core in place within the mantle.

Abstract: Tools for expanding (i.e., flaring and swedging) the ends of metal tubes are configured for attachment to a powered impact hammer, such as an air hammer. A swedging tool for swedging an end of a metal tube has a swedging body with a die section for expanding the tube when driven thereinto and a flanged shank attached to the swedging body and configured for engagement by a powered impact hammer. A flaring tool for flaring an end of a metal tube includes a flaring body having a die section for flaring the tube when driven thereinto. A flanged shank is attached to the flaring body and configured for engagement by a powered impact hammer. A method for expanding an end of a metal tube entails attaching a die body for expanding the end of the metal tube to a powered impact hammer, aligning the die body with the inner diameter of the metal tube, activating the powered impact hammer, and urging the die body a determined distance into the metal tube.

Abstract: The invention relates to an automotive heat exchanger comprising a) a heat exchange core (2) comprising a header part (10) comprising a plurality of heat transfer tubes (4), b) a plastic manifold body (18) forming an aperture for receiving end portions of heat transfer tubes (4), and C) a plastic insert plate (16) having a plurality of openings (24), wherein i) end portions of the heat transfer tubes (4) are received by and extend through the openings (24) of the plastic insert plate (16) and extreme parts of the end portions of the heat transfer tubes (4) have been bended outwardly, ii) the plastic insert plate (16) is fastened to the side walls of the manifold body (18), and iii) the manifold body (18) is joined to the heat exchange core (2) only through fastening of the plastic insert plate (16) to the manifold body (18).

Abstract: The invention relates to a heat exchanger, in particular a capacitor (1) for an air conditioning system, in particular in motor vehicles. Said heat exchanger comprises at least one collector pipe (4) and at least one connection flange (9) which has a material connection with the collector pipe (4) and communicates therewith. The collector pipe (4) comprises a collar (8) and the connection flange (9) comprises a boring (10) wherein the collar (8) can be connected in front of the material fit. The invention is characterised in that the collar (8) can be fixed by a reshaping by means of a stamp having a polygonal cross-section.

Abstract: A cold and/or heat accumulator with a plurality of carrier elements (10) which are charged with a cold or heat storage medium, and with a heat exchanger (12) which is designed to have a heat transfer medium flow through it in order to cause heat exchange between the cold or heat storage medium and the heat transfer medium. The heat exchanger (12) has at least one serpentine hollow section (14), and at least at least one carrier element (10) is provided between the legs of at least some of the loops of the serpentine hollow section. In a process for producing the cold and/or heat accumulator, the height of the carrier elements is coordinated to a distance between the legs of the at least one loop such that, after a force-fit connection is formed between the serpentine hollow section and the carrier elements.

Abstract: There is described a heat exchanger (1) comprised of at least one exchanger module (13), comprising a combustion chamber (10) for the generation of an exchange fluid, a slotted wall (11) for the passage of the exchange fluid and an expulsion chamber (12) for the exchange fluid provided with a discharge flue (33). Said exchanger module (13) is formed by a pair of basic elements (14), each of which contributes to form a part of said combustion chamber (10), a part of said slotted wall (11) and a part of said expulsion chamber (12). The basic elements (14) are reciprocally connected in facing position so as to form a single block. The present invention allows to facilitate the assembly operations for a heat exchanger, to obtain modular exchangers and to reduce the structural elements of the exchangers.

Abstract: The present invention relates to automotive heat exchanger assemblies that can withstand high environmental temperature and pressures conditions. By providing a tube strengthener inserted into the tubes at the areas of highest stress, the heat exchanger assembly is strengthened to be efficient under typical operating conditions.

Abstract: The invention provides a method and apparatus for integrating the tube side streams in a plurality of plate fin and tube or finned tube exchangers to accomplish more efficient heat transfer or a more compact design.

Abstract: A reduction in tube to header joint failures in a heat exchanger having spaced headers (12,14), elongated, side-by-side parallel spaced tube slots (22) in the headers (12,14) along the length thereof and a plurality of flattened tubes (26) having ends (24) received in the tube slots (22) and metallurgically bonded to the header (12,14) thereat was achieved through the use of a reinforcing structure (38) having at least two projections (40) having a cross sectional shape complimentary to at least a part of the surface of the tubes (26) at their ends (24) and a length sufficient to extend along the tube ends (24) to a location past the metallurgical bonds between the tube ends (24) and a header (12,14), and a spine (44) extending transverse to the projection. Also disclosed is a reinforcing structure (38) and a method of reinforcing the tube to header joints in a heat exchanger.

Abstract: A heat exchanger includes a plurality of tubes, a header tank coupled to the plurality of tubes, and a connector coupled to the header tank. The connector includes a female joint part that is to be coupled to a male joint part of an external pipe and a tubular part that extends from the female joint part and has a closed end on a side opposite to the female joint part. The connector is coupled to the header tank such that a side wall of the tubular part is located on an outer periphery of the header tank.

Abstract: An core unit for a heat exchanger being bent about an axis perpendicular to the core unit's headers. Tubes establish fluid communication between the core unit's headers, and a bend relief spacer is disposed between first and second groups of tubes. During the bending process, the bend relief spacer facilitates the bend and ultimately maintains the performance of the core unit.

Abstract: A method for manufacturing a catalyst carrier body includes producing a honeycomb body having at least partially structured layers forming channels through which a fluid can flow. The honeycomb body has an external extent formed at least partially by ends of the layers. At least one corrugated casing and a housing are also produced. The honeycomb body is inserted into the corrugated casing and the corrugated casing with the honeycomb body is inserted into the housing with the housing at least partially surrounding the honeycomb body. The housing is calibrated by reducing at least an internal contour of the housing and preferably also a profile of the corrugated casing. The honeycomb body is connected to the housing with the corrugated casing disposed between the honeycomb body and the housing. A catalyst carrier body produced by the method is also provided.

Abstract: A sheet of expanded metal produced by slitting a sheet of metal, and stretching along a stretching direction, which sheet of expanded metal forms a grid of openings having a first repetition length in the stretching direction and a second repetition length in the direction perpendicular to the stretching direction, wherein the first and second repetition lengths are substantially equal. A sheet of expanded metal having a stretching angle larger than 90 degrees. Use of a sheet of expanded metal according to the invention for supporting a bundle of parallel tubes. A method of manufacturing expanded metal from pre-expanded metal, wherein expansion force is applied at a plurality of points perpendicular to the stretching direction, wherein the expansion force is applied using a plurality of force transmitters co-operating with the plurality of points, and wherein the force transmitters are arranged so that they can move towards each other in the second direction while applying extension force.

Abstract: A corrosion-resistant alloy metal tube sheet used to construct a shell and tube heat exchanger (50) for cooling fluids with sea water passing through corrosion-resistant alloy tubes (25) contained in a horizontal carbon steel outer shell (1) that are supported and sealed at each end by passing them through holes (27, 30) in a carbon steel tube sheet (28, 31) and axially aligned holes (36, 37) in alloy tube sheets (34, 35) that cover and protect the adjacent interior carbon steel tube sheets from sea water corrosion. The walls of the holes (27, 30, 36, 37) have at least one annular groove (45, 46) and the ends of each tube are radially expanded to form circumferential ridges (40, 41) on the outside of each tube at a mating location with each of said annular grooves (45, 46) where they are forcibly driven into the grooves to form a circumferential joint having good mechanical strength and water tightness, thereby eliminating the need for welding the external joint between the alloy tube sheets and alloy tubes.

Abstract: A tube plate for exhaust heat exchangers, with punched openings to hold the tube ends of a tube bundle, wherein the openings are arranged grid-like with a web width b, and each of the openings has a shear surface with a height h produced by punching, and a bevel of depth t, that is manufactured before punching, and wherein the height h is roughly the same as or smaller than the web width b, is disclosed.

Abstract: A brazable composite metal material for a heat exchanger tube or manifold, a method of making the tube or manifold, and a heat exchanger made therefrom. The composite metal suitable for making the heat exchanger tube or manifold has one of an aluminized carbon steel, galvanized carbon steel, or steel wire mesh core roll bonded to at least one outer layer of a brazable aluminum alloy, such as type 3003 aluminum alloy.

Abstract: A method for combining axially heated heat pipes and a heat-conducting base includes the steps of preparing a heat-conducting base and a plurality of heat pipes, providing a plurality of penetrating holes on a surface of the heat-conducting base, inserting one end of each heat pipe into the individual penetrating hole of the heat-conducting base, performing a lateral pressing to the heat-conducting base so as to bring each heat pipe into a tight and planar contact with the wall of each corresponding penetrating hole in the direction of pressing, and grinding the bottom surface of the heat-conducting base to become a flat surface to make the end of each heat pipe flush with the bottom surface of the heat-conducting base.

Abstract: The present invention relates to a heat exchanger having a cooling core consisting of a plurality of parallel, heat exchanging tubes and two manifolds provided with slots, where the ends of heat exchanging tubes are inserted in fluid connection with each manifold and each slot is defined by a slot opening and parallel-running slot walls formed from deformed wall portions of the manifold. In order to improve a rigidity of construction of the heat exchanger the outer sides of said slot are deformed inwardly relative to the manifold wall, forming concavities in the manifold outer surface, the inner sides of said slot are deformed inwardly relative to the manifold wall, forming convexities in the manifold inner surface, and the convexities comprise grooves forming the slot walls in order to accommodate at least a portion of the longitudinal edges of the end of exchanging tube. A method of manufacturing such a heat exchanger manifold is also provided.

Abstract: A heat exchanger (10) is provided with a PTO section (12) passing through its core (14), with all of the components of the heat exchanger (10) being brazed together at the same time during assembly of the heat exchanger (10).

Abstract: A heat exchanger has tubes for performing heat exchange between an internal fluid flowing inside of the tubes and an external fluid flowing outside of the tubes and a tank connected to the tubes. Each of the tubes has projections projecting from an outer surface thereof. The projections are arranged in a longitudinal direction of the tube such that grooves are provided between the adjacent projections as external fluid passage portions. The tank has tube insertion portions defining openings into which ends of the tubes are inserted. Each of the tube insertion portions is configured such that a perimeter surface defining the opening thereof entirely covers at least one external fluid passage portion of the tube.

Abstract: A plastic intercooler assembly includes a plurality of plastic tubes that extend between plastic end plates. The plastic tubes are secured to the end plates to provide the desired seal between the end plates and the ends of the tubes. The plastic tubes are attached utilizing plastic welding methods that reduce assembly time and cost.

Abstract: The invention relates to a container, in particular a collection chamber of a heat exchanger, comprising an opening (2), in which a connection (5) is mounted. To simplify the installation of the connection, the latter (5) has a deformable connection edge region (10) on the edge facing the container (1), said edge region protruding into the container (1) prior to the deformation process and after the deformation lying at least partially against the interior of the container opening (2).

Abstract: The invention relates to an innovative method for manufacturing plate stacks, particularly for manufacturing coolers or cooler elements or heat sinks at least one plate stack, with at least two plate-shaped elements made of metal, for example copper, and provided with passages or openings, wherein the stacked elements are joined with each other using bonding on joining surfaces formed by surface sides of said elements by heating to a process temperature to form the stack.

Abstract: The invention relates to an exhaust gas heat exchanger for motor vehicles, comprising a cluster of exhaust pipes (10) which are soldered on the front surface thereof to pipe bottoms, and a housing jacket (3, 3b) which is welded to the pipe bottoms (7). According to the invention, the pipe bottoms are welded to the housing jacket (3b) by means of peripheral welds (11).

Abstract: A core unit for a heat exchanger comprises a pair of headers spaced from one another each defining a fluid space for receiving a fluid therein and each defining a plurality of apertures. A first region comprising a plurality of first tubes extends between the headers and a first fin is disposed between adjacent pairs of the first tubes. A second region comprising a plurality of second tubes extends between the headers and a second fin is disposed between adjacent pairs of the second tubes. A crushable center different than the first and second regions is disposed parallelly between the first and second regions for controllably crushing when the headers are bent.

Abstract: A method for producing a tubular component, in which, after machining successively respective threaded elements at both ends of the tubular component, a second orientation gauge is screwed onto the second threaded element to check whether a mark on the gauge comes into alignment with an orientation mark that has been drawn on the component, after the first element has been machined and a first orientation gauge has been screwed onto the first element in axial alignment with a mark provided on this gauge. If not, the machining of the second element is repeated with parameters varied accordingly. Such a method may find particular application to the drilling and operation of hydrocarbon wells.

Abstract: A pipe joint structure includes a plurality of fluid flow path portions, a socket connected to the fluid flow path portions, a connection plate disposed to abut against the socket, a plurality of pipes connected to each other by the connection plate, and a seal member disposed between the plurality of pipes and the socket. The socket includes a connection portion that is located to cover an edge of the connection plate and to fix the plurality of pipes to the plurality of fluid flow path portions. The pipe joint structure can be suitably used for a heat exchanger.

Abstract: A secondary heat exchanger subassembly, such as a transmission oil cooler, is disposed in a metal tank of a radiator and has a pair of metal fluid fittings. Either a connector ring engages a fitting extending through the opening in the tank or a connector nut extends into the opening to threadedly engage the fitting whereby the metal fittings are held to the metal tank and inserted into a furnace for being brazed into sealed relationship with the metal tank.

Abstract: A heat exchanger assembly includes a first header having an inlet and a second header having an outlet spaced parallel from each other. A plurality of tube members having an ultimate strength (Us) and a width (w), extend between the first header and the second header. The tube members define a plurality of fluid passages for the flow of a liquid through the tube members and between the first and second headers. The tube members extend through at least one bend having a bend radius (r) in the range of 50.00 mm to straight (?) through angles between 0 and 100 degrees. A plurality of corrugated air fins are brazed between adjacent tube members. The bends of the tube members satisfy a bending formula (w/r)Us?30 mega Pascal.

Abstract: A heat exchanger for cooling exhaust gas, around which a liquid cooling medium flows on the outside, including a bundle of rectangular tubes provided as ducts for the exhaust gas whose ends are welded into tube bottoms. The bundle of rectangular tubes is surrounded with a sheet metal jacket which follows the contour of the bundle and which is provided with a cooling medium inlet and a cooling medium outlet. The ends of the sheet metal jacket are provided with welded-on flange plates which are each open by means of a central opening with respect to the bundle of rectangular tubes and which are provided with fastening devices for fastening onto pipe sections of an exhaust pipe.

Abstract: In a heat exchanger, a core portion includes a plurality of plate fins each shaped like a flat plate and a plurality of tubes in which a fluid flows and each of which is inserted into each of the plate fins to be mechanically bonded thereto. Further, an end portion in a longitudinal direction of each of the tubes is bonded to a header plate which constructs a part of a header tank. In this heat exchanger, the tube is bonded to the header plate in a solid phase. Therefore, the plate fins are mechanically bonded to the tube and the end portion of the tube in the longitudinal direction of the tube can be bonded to the header plate without a furnace of a high temperature.

Abstract: A condenser includes a pair of tanks, at least one of the tanks having a communicating hole, a condenser core arranged between the tanks and having fins and tubes fluidically connected with the tanks, and a connector having a connecting hole. A peripheral portion of the communicating hole is pressed into the connecting hole to form a burring portion which is caulked on an inner face forming the connecting hole so that the connector and the tank are temporarily fixed with each other, and facing portions of the tank and the connector are integrally fixed with each other by blazing. The inner surface of the connecting hole is provided with a holding groove to receive an inserted projecting portion formed on a part of an outer surface of the burring portion for holding the connector to the tank.

Abstract: A CPU cooling assembly includes a copper cold plate in which a pattern of ultra thin fins and channels are formed, and a copper manifold-cover in which a series of alternating inlet and outlet channels are formed, at right angles to the fin pattern. The manifold cover is sealed to the cold plate by a resistance welding technique that melts and closes up a perimeter welding seam just as the bottom edges of the manifold channels lightly engage the top edges of the micro fins. The result is a fully sealed assembly in which the channels and fins form an effective, very finely divided and regular checker board flow pattern for a suitable cooling fluid, with no deformation or clogging of the ultra thin flow channels.

Abstract: The invention relates to a plate heat exchanger and a method of manufacturing a plate heat exchanger. The plate heat exchanger includes a number of heat exchanger plates (1, 1?, 1?) which are provided beside each other and connected to each other by means of a braze connection. The heat exchanger plates are substantially manufactured in stainless steel containing chromium. The plate heat exchanger includes a number of port channels extending through at least some of the heat exchanger plates. Each port channel is surrounding by a connection surface (5) for connection of the port channel to a pipe member (6). The connection surface includes a material permitting brazing of the pipe member to the connection surface in a more easy manner than stainless steel.

Abstract: A method of manufacturing a header pipe for a heat exchanger, including (a) forming a header pipe as a single body with a vertically separating panel between first and second channels, including a plurality of slots through the pipe adapted to connect to cooling fluid tubes of a heat exchanger, (b) introducing a punch into the inside of one of the channels of the header pipe with more than one nipple facing one side of the separating panel, (c) inserting a die into the inside of the other of the channels of the header pipe with punching holes aligned with the punching nipples and the other side of the separating panel, (d) inserting a pressuring pole of a pressuring device through the header pipe slots into the one channel, and (e) moving the pressuring pole to press the punch toward the separating panel to punch more than one hole into the separating panel.

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: Marking of the cuts which have to be made, cutting of the section at two ends, removal of the section which has to be replaced, bevelling of the joint ends of the parts remaining after the section has been cut out from the pipe, adjustment of a new or replacement section for length and bevelling of its joining ends and positioning and narrow bevel welding of the ends joining the replacement section to the ends of the remaining parts of the pipe are performed outside the pipe. Within the pipe operations of machining and inspecting an internal part of the joining ends welded together are performed by remote control in a programmed way by introducing and positioning means for working within the pipe from a component of the primary circuit.

Abstract: In a brazed structure, a first member has a first portion defined by one of a recessed portion and a hole, and a second member has a second portion brazed to the first portion with a copper brazing material. The first member has a coefficient of thermal expansion that is smaller than that of the second member.

Abstract: A radiating appliance consisting of a plurality of heat-transfer tubes, radiators, and a heat-transfer plate is processed in a method including the following steps: position the heat-transfer tubes in grooves formed in a recess on one radiator; position the heat-transfer plate in front of the recess to locate above the heat-transfer tubes; and drive a heated flat pressure plate to press the heat-transfer plate into the recess and flatten the heat-transfer tubes, as well as melt paste tin positioned in the grooves below the heat-transfer tubes, so that the heat-transfer tubes and the radiator have increased contact area between them, and the molten paste tin firmly bonds the heat-transfer tubes, the radiator, and the heat-transfer plate to one another to form the radiating appliance.