Abstract: A layered heat exchanger for use in evaporators or the like has a pipe mount plate which is given improved amenability to brazing at the portion thereof between a fluid introduction pipe socket and a fluid discharge pipe socket provided on the plate. This feature reliably precludes the development of a shortcut channel between the fluid introduction channel and the fluid discharge channel due to a faulty brazed joint.

Abstract: A tank of heat exchanger comprises a tank body and a metal member. The metal member is at least one of a pipe member, a header plate member, an end plate and a filler neck member. The tank body is made of a metal and shaped like a channel member including a base wall and opposed side walls between when the base wall extends. The metal member is hermetically secured to a given portion of the tank body by partially welding the metal member to the given portion and then brazing the metal member to the given portion.

Abstract: A connecting device for a heat exchanger which has a fluid circulating channel formed with an opening at one end thereof and an opening at the other end thereof, the openings being formed as juxtaposed in one side of the heat exchanger. The connecting device comprises a blocklike connector body having two horizontal through bores corresponding to the respective openings and fixed to the heat exchanger with the through bores in coincidence with the respective openings. A tubular member is fluid-tightly fitted in each of the through bores and has a connecting end projecting toward a connectable device. The connecting end is in the form of a spigot fittable in a socket of the connectable device.

Abstract: A first joint block 30 and a second joint block 40 are connected to an end of a refrigerant inlet pipe 6a and that of a refrigerant outlet pipe 6b, respectively. Both the joint blocks 30 and 40 are connected each other. A predetermined face of the first joint block 30 constitutes a first flange face 31, and a face of the second joint block 40 facing toward a direction different from the predetermined face constitutes a second flange face 41. At the end of a first external pipe 50a and that of a second external pipe 50b, flange members 51a and 51b are attached. When connecting these flange members, the first and second external pipes 50a and 50b are connected to the joint blocks 30 and 40 from different directions.

Abstract: A heat exchanger (10) connectable with at least one connecting element (11). The heat exchanger is made up of a stacked structure and has holding devices (17) embodied as part of a heat exchanger housing. The holding devices can be produced by deforming an end plate (18) of the heat exchanger or they may be soldered on the end plate (18) in the form of profiled strips (24). The connecting element has corresponding locating elements (19), and assembly is carried out by deforming the holding devices (17) or by configuring the holding devices in the form of a bayonet lock. The integration of the holding devices (17) into the end plate (18) of the heat exchanger has the advantage of reducing manufacturing costs and simplifying assembly.

Abstract: A heat exchanger including a core having a plurality of flat tubes with fins between adjacent tubes, the tubes each having flat side walls connected by front and rear walls defining a flow path, all of the walls extending longitudinally between opposite tube ends with the tube side walls defining a first height. First tube end portions in the tube ends of a plurality of the plurality of flat tubes include flat side walls flared apart to define a second height greater than the first height. Second tube end portions in the tube ends of the plurality of the plurality of flat tubes include a longitudinally extending cut through the front and rear walls with the flat side walls flared apart to define a third height greater than the second height. The side walls of adjacent tubes are secured together at the tube ends, and headers connect to the tube front and rear walls at the first and second tube end portions whereby the headers communicate with the tube flow paths.

Abstract: A heat exchanger has a tank for accommodating a heat medium therein and a tube connected to the tank through a core plate. Specifically, an end portion of the tube is inserted into a connection hole of the core plate and is mechanically joined thereto. A joined portion of the tube and the core plate is covered with adhesive through a wettability improving film for improving wettability of the adhesive to the joined portion. As a result, a sealing property between the tube and the core plate is easily and stably improved by the adhesive.

Abstract: The invention relates to a heat exchanger, in particular to an evaporator for a vehicle air-conditioning system, having at least one header tank made from metal with a base section for the connection of heat-exchange tubes, and at least one longitudinal-side section. The longitudinal-side section has connection openings which are provided with at least one connection flange attached to the longitudinal-side section.

Abstract: Heat exchanger (30), comprising a thermopositive core part (31) and thermopositive heat transfer elements (32), which are wires, bristles, fibers, strips or equivalent, preferably copper wires or carbon fibers. The heat transfer wires are squeezed between tubes or rods twisted about each other.

Abstract: A header pipe 3 is prepared by severing an elongated round pipe to a desired length, forming an engagement recess 1 in the inner surfaces at opposite open ends, and forming a multiplicity of flat holes 2 in the peripheral surfaces. A flat tube 4 is inserted into each of the flat holes 2, with fins 5 fixedly secured to the outer surfaces thereof to thereby construct a core 6. End members such as the end portion of a port pipe 7 and an end cover 8 are fitted to the openings of the header pipe 3 by way of an O-ring 9 for sealing, to complete a module-type heat exchanger.

Abstract: A flow merging and dividing device, wherein two refrigerant flows move from two inlets (31, 32) located at an inlet part (5) into a merging part (6) for merging, the drift of the two refrigerant flows is eliminated by the merging of the flows at the merging part (6), and the refrigerant flows in which the drift is eliminated by the merging of the flows at the merging part (6) flows out from three outlets (33, 35, 36) located at an outlet part (7), whereby two refrigerant flows can be discharged as three refrigerant flows again from the three outlets (33, 35, 36) after two refrigerant flows are merged so as to eliminate the drift of the two refrigerant flows.

Abstract: A heat exchanger has a fluid chamber with a peripheral foot, as well as a collector plate with an edge delimiting a groove for a gasket and the peripheral foot. The gasket is formed from a bead of a polymerizable material which is deposited, at a chosen location, on the bottom of the groove, and then polymerized before being compressed by the peripheral foot of the fluid chamber.

Abstract: A fitting/manifold assembly and method are provided for a heat exchanger. The method includes the steps of providing a manifold (22) including a wall (30) having an aperture (32) therethrough; providing a fitting (24) including a body (42), a nipple (44) extending from the body (42) and having an interior surface (50), and an opening (54) extending through the body (42) to allow access to the interior surface (50); inserting the nipple (44) into the aperture (32) from one side of the wall (30) so that the body (42) of the fitting (24) is on the one side of the wall (30) and a portion (48) of the nipple (44) is on the other side of the wall (30); deforming the interior surface (50) of the nipple (44) with a deforming tool (60, 104) inserted through the opening (54) in the body (42) to enlarge the portion (48) to a shape that restricts retraction of the nipple (44) from the aperture (32).

Abstract: A first joint block 30 and a second joint block 40 are connected to an end of a refrigerant inlet pipe 6a and that of a refrigerant outlet pipe 6b, respectively. Both the joint blocks 30 and 40 are connected each other. A predetermined face of the first joint block 30 constitutes a first flange face 31, and a face of the second joint block 40 facing toward a direction different from the predetermined face constitutes a second flange face 41. At the end of a first external pipe 50a and that of a second external pipe 50b, flange members 51a and 51b are attached. When connecting these flange members, the first and second external pipes 50a and 50b are connected to the joint blocks 30 and 40 from different directions.

Abstract: A “header-less” radiator utilizes a radiator core including tubes having end walls which are bifurcated for a short distance from the ends of the tubes and having one or both of the sidewalls in the bifurcated segment of the tube formed outward and adapted to contact and be joined in a fluid tight manner with the sidewall of an adjacent tube in the radiator core. A collecting tank has walls extending partially over the core to a distance beyond the bifurcation of the sidewalls, and joined to the end walls of the tubes in a fluid tight manner, such that the walls of the collecting tank in conjunction with the bifurcated end walls and outwardly formed side walls of the tubes define a common fluid plenum providing fluid communication between the tubes and the collecting tank.

Abstract: Disclosed are means for improving the service-life of indirect tubesheet type heat exchangers used in chemical reactors, particularly those exposed to reducing, nitridizing and/or carburizing environments. Such means include the use of certain ferrules within the heat exchange tubes and/or weld types used in construction of these heat exchangers.

Abstract: Device for connecting a heat exchange pipe (4), whereby said pipe (4) is positioned between walls (11) that are located on both sides of pipe (4), intended for heating and/or cooling a reactor, whose internal pressure is considerably higher than the atmospheric pressure and than the pressure that prevails inside said pipe (4), and said reactor, whereby said device comprises a series of cooperating means that comprise: means for connecting this pipe (4) and jacket (2a) of said reactor, whereby said means comprise a packing box (21, 22, 23), a flange (28) that is attached to jacket (2a) of the reactor by means of a joint (18), a bellows (25) that is placed between packing box (21, 22, 23) and said flange (28) to ensure a relatively flexible connection between pipe (4) and jacket (2a) of the reactor.

Abstract: In a heat exchanger having a tank portion (4) defining a fluid inlet path (34) and a fluid outlet path (35) for conducting a heat exchange medium, an inlet portion (36) and an outlet portion (37) are formed integral with the tank portion to communicate with the fluid inlet path and the fluid outlet path, respectively. The inlet portion is adapted to connect with a fluid inlet pipe for introducing the heat exchange medium into the fluid inlet path. The outlet portion is adapted to connect with a fluid outlet pipe for discharging the heat exchange medium from the fluid outlet path.

Abstract: A heat exchanger has a tank for accommodating a heat medium therein and a tube connected to the tank through a core plate. Specifically, an end portion of the tube is inserted into a connection hole of the core plate and is mechanically joined thereto. A joined portion of the tube and the core plate is covered with adhesive through a wettability improving film for improving wettability of the adhesive to the joined portion. As a result, a sealing property between the tube and the core plate is easily and stably improved by the adhesive.

Abstract: A heat exchanger has a header tank, plural tubes through which refrigerant flows and a connector for connecting the tank to a pipe. The header tank has a pair of protruding portions protruding from an outer surface of the header tank and integrally formed with the header tank. When the connector is bonded to the tank by brazing, the connector is disposed between the protruding portions, and each of the protruding portions is bent toward the other at a protruding end thereof by plastic deformation. As a result, the connector is clamped by the protruding portions and is fastened to the header tank. Thus, the connector is readily and tentatively fastened to the header tank before bonded to the header tank by brazing.

Abstract: Device for connecting tubular conduits with the distributor section or tank (2) of a liquid treatment flow through apparatus (1) provided with treatment elements assembled as a parallelepiped package or core the tank extending over a front surface of the package and provided in a corner section with a cut off triangular section (3) in which there is provided a passage (4) for the liquid, and a substantially pyramidal hollow adapter attachment (6) which may be mounted on the triangular section (3) and which is provided with a base surface having a passage for the liquid corresponding to the passage for the liquid of the triangular section and with a conduit connector opening (9) in one of its side surfaces.

Abstract: A heat exchanger is provided with a casing (5) in which a heat exchanger core (3) is received. The core (3) is provided with a pair of inlet/outlet convex portions (1) in its opposite end portions. These pipes (1) pass through the casing (5) to project outward.

Abstract: One end sides of two sets of pressed-type headers, which have been molded by an existing press, are cut off, respectively, the cut-off portions of thus obtained one-side-cut-off headers are abutted together and are welded to each other, and a nozzle is welded to the position of a welded portion. With this construction, a large header, which is larger than the pressed-type header, can be manufactured, and the use of which permits a large plate-fin type heat exchanger, that can be used at high pressure, to be manufactured.

Abstract: A tube is formed by brazing first and second plates, and is connected to a pipe through a connection block being brazed to a contacting surface of the first plate. A brazing material is clad on an inner surface of the first plate opposite to the contacting surface, and a hole penetrating through the first plate is formed in the first plate at a position corresponding to the connection block. Thus, during brazing, the brazing material clad on the inner surface of the first plate is supplied to the contacting surface through the hole by capillary phenomenon, so that the connection block is brazed to the first plate. As a result, an apparatus formed by brazing plural metal members, such as the tube of an oil cooler, is produced in low cost.

Abstract: The present invention relates to a heat exchanger applied for an IC production line or the like, wherein, on plural independent tube holding holes 20 formed on holding plates 20, ends of resin tubes are arranged, and a predetermined length range &agr; of the each resin tube is integrally fused into the each holding plate inside the tube holding holes. Each fusing portion for fusing the plural resin tubes into the holding plates has a non-contacted congestion structure wherein the resin tubes are not mutually contacted, thereby increasing reliability on connecting the fusing portion, and meanwhile, facilitating miniaturization of the heat exchanger by increasing heat-exchange efficiency and elements such as the resin tubes and the holding plates may be made of a fluororesin.

Abstract: A connecting device for a heat exchanger which has a fluid circulating channel formed with an opening at one end thereof and an opening at the other end thereof, the openings being formed as juxtaposed in one side of the heat exchanger. The connecting device comprises a blocklike connector body having two horizontal through bores corresponding to the respective openings and fixed to the heat exchanger with the through bores in coincidence with the respective openings. A tubular member is fluid-tightly fitted in each of the through bores and has a connecting end projecting toward a connectable device. The connecting end is in the form of a spigot fittable in a socket of the connectable device.

Abstract: A heat exchanger for vehicles comprises firstly a heat-exchanger assembly consisting of flat liquid-conveying tubes and surface-enlarging means, secondly an inlet tank, and thirdly an outlet tank. The inlet tank and the outlet tank have a connection plate with a number of connection holes for the tubes. At each hole, the plate has a projecting connecting sleeve element. Each tube has at its ends a widened main portion which is accommodated on said connecting sleeve element. A rounded transitional area is formed between the connection plate and each connecting sleeve element, and the main portion is inserted in the conecting sleeve element and is applied with its outside against the inside of the connecting sleeve element. Each tube has at its ends an end portion which is widened in relation to the main portion, merges with the main portion and is applied against the transitional area.

Abstract: A heat exchanger includes a pair of manifolds, each of which has a plurality of axially spaced oblong slots, and each of which has at least two detents formed therein. A plurality of generally flat tubes extends between the manifolds and individually through the slots for providing fluid communication between the manifolds. A plurality of radiation fins extends between adjacent flat tubes. A plurality of brackets is provided for mounting the heat exchanger. Each of the brackets has a curved portion, a flange portion and a mounting portion. The curved portion extends circumferentially around a portion of the manifold. The curved portion has opposite ends and has means located midway between the ends for allowing the ends of the curved portion to move resiliently relative to each other to widen the distance between the ends. The curved portion also has at least one protrusion adjacent to each end. Each of the protrusions extends into one of the detents in the manifold.

Abstract: The present invention concerns a plate heat exchanger for at least two heat exchanging fluids. The heat exchanger is permanently joined and includes at least one core of plates with corrugated heat exchanging plates (1-4) creating plate interspaces between one another, at least two end plates (5) as well as inlet devices (6) and outlet devices (6) for the heat exchanging fluids. At least one of the end plates (5) is equipped with at least one port hole communicating with an inlet channel or an outlet channel. At least one of the mentioned inlet devices (6) and outlet devices (6) has both a connection part (7) equipped with a channel and a transition part (8) with an envelope surface and equipped with a channel.

Abstract: A side refrigerant outlet passage and a side refrigerant inlet passage are provided between first and second protruding portions of a side plate and an end plate, which are joined to one another. The side plate has base portions protruding in an opposite direction of the end plate, and a pipe joint including an outlet pipe and an inlet pipe is joined to the base portions of the side plate. Accordingly, a strength of joining portions between the side pate and the pipe joint is improved, and simultaneously processing cost of the pipe joint is decreased.

Abstract: A radiator includes a plurality of flat tubes in which refrigerant flows, corrugated fins each of which is disposed between adjacent the flat tubes, and a header tank disposed at both end sides of each flat tube in a longitudinal direction of the flat tubes. A plurality of insertion holes into which the flat tubes are inserted are formed in a tank portion of the header tank, and each of the insertion holes has a hole width approximately equal to a tank width of the header tank in a width direction perpendicular to both of the longitudinal direction of the flat tubes and an extending direction of the header tank. The tank portion of the header tank is integrally formed from extruding or drawing, and the insertion holes are formed by shaving the tank portion after the extruding or drawing. Thus, the insertion holes can be readily provided in the tank portion integrally formed from the extruding or the drawing, and pressure tightness and manufacturing workability of the header tank can be improved.

Abstract: A modular heat exchanger includes a plurality of tubular modules formed from an aluminum extrusion. Each extruded tube has a generally rectangular cross section, a through bore extending longitudinally therethrough between parallel opposite faces, and parallel longitudinal V-grooves in the faces, all formed in the extrusion process. Each face includes a plurality of parallel fins which are cut into the grooved face in a direction transverse to the grooves. The fins have a generally saw tooth structure so as to increase the turbulence of the air flow through the heat exchanger. Unslotted end faces on the tubes include groove portions which are filled with weld material in both the tube joining process and the end tank welding process, thereby providing an all-welded aluminum heat exchanger of substantially enhanced strength. In another embodiment utilizing an all-welded construction, extended unslotted end faces are cross bored and sealed to provide fluid supply in lieu of the end tanks.

Abstract: A radiator includes a core portion, a header tank, a side plate attached to the core portion and a bracket through which the radiator is mounted to a vehicle. The bracket is separately formed from the header tank, and is connected to the side plate through a bolt. As a result, the radiator is readily mounted to a vehicle of a different model by only changing an attachment position of the bracket to the radiator, without modifying the header tank. Further, the bracket includes a coolant receiving portion disposed to face a drain outlet of the header tank with a predetermined gap therebetween. Therefore, coolant discharged from the header tank collides with the coolant receiving portion to reduce its dynamic pressure. As a result, coolant drained from the radiator is restricted from being scattered.

Abstract: A heat exchanger is provided including a first aluminum extruded header spaced apart and arranged essentially parallel to a second aluminum extruded header. The first and second headers include a plurality of parallel passageways extending therethrough along a longitudinal axis thereof. The passageways are fluidly interconnected by at least one transverse cross-drilled bore extending essentially perpendicularly to the longitudinal axis. A core assembly is secured between the first and second headers including a plurality of fluid conduits and heat radiating fins surrounding the fluid conduits. A by-pass valve assembly fluidly communicates with the headers and core assembly while providing an alternate pathway independent thereof. Preferably, the by-pass assembly is responsive to fluid temperature and/or pressure for directing fluid flow either into or exterior of the heat exchanger core assembly.

Abstract: A method for enhancing the brazeability of a heat exchanger manifold block (110) by promoting the braze metal flow in and around the manifold block (110) during brazing within a braze furnace. The invention is particularly directed to enhancing a brazement between a manifold block (110) and a jumper tube (124) that fluidically connects the block (110) to another component of the heat exchanger system. The method entails increasing the rate of convective and radiative heat transfer to the block (110) during brazing within a braze furnace by providing fins (116, 128), grooves (118, 130) or similar features on one or more surfaces of the block (110) that increase the surface area of the block (110), and consequently increase the heating rate of the block (110) to something closer to that of the tube (124). In effect, the surface features increase the heat transfer rate of the block (110) to compensate for the disparate thermal masses of the block (110) and tube (124).

Abstract: The invention refers to a flat tube heat exchanger for motor vehicles in which the flat tubes leaving an internally projecting free end as an overhand are inserted in collars which extend to the inside and which are opened up in the form of a tulip of slits of a tube bottom of a header case for the internal heat exchange fluid and the header case comprises at least one partition dividing off various chambers of the header case and intersecting the flat tubes, the partition reaching at least down to the ground of the tube bottom adjacent to the flat tubes or to the collars extending to the inside and comprising in the region of the free ends of the flat tubes in the header case recesses overgripping the free ends, and the free ends of the first tubes in the header case being arranged with an undercut with respect to the collars opened up as a tulip which locks the flat tubes against being pulled out of the tubes bottom.

Abstract: A heat exchanger has a thin wall with a sleeve fitting operatively connected thereto and an interior bore in the sleeve fitting to receive the end of a tube. The sleeve fitting has an annular shoulder collar formation thereon spaced from the adjacent thin wall which engages an assembled locking ring which is assembled over the sleeve fitting by axial movement along the sleeve fitting. An assembly member applies a force against the locking ring to cause it to slide over the sleeve fitting and radially inwardly constrict the sleeve fitting against the tube thus forming a permanent mechanical seal therebetween while simultaneously, another assembly member supports the sleeve fitting at the shoulder collar to prevent transmission of force from the first assembly member to the thin wall of the heat exchanger.

Abstract: A heating or cooling arrangement in a motor vehicle is provided with an equipment block, in which a heat exchanger, an evaporator, a condenser or a cooler are arranged on the inlet and outlet pipes. The heat exchanger, evaporator, condenser or cooler is slid into the equipment block as a preassembled heating or cooling unit. The equipment block is provided with clamping elements by which inlet and outlet pipes arranged on the heat exchanger, the evaporator, the condenser or the cooler in a preassembled manner are connected with the equipment block.

Abstract: An automotive heat exchanger that includes a manifold (12) and a mounting block (10) attached to the manifold (12) and over an opening (30) in the wall of the manifold (12). The mounting block (10) has a flange portion (16) with a surface (18) that engages approximately half of the outer perimeter of the manifold (12). The block (10) also includes means (20, 24) for securing the heat exchanger to an automobile (14), and an inlet/outlet port (26) extending through the block (10) and in fluidic communication with the opening (30) in the wall of the manifold (12). Grooves (19) are preferably present in the surface (18) of the flange portion (16) of the block (10), two of which engage raised portions (23) on the perimeter of the manifold (12) in order to aid in securing the block (10) to the manifold (12). The remaining grooves (19) provide reservoirs between the block (10) and manifold (12) for braze material (21) that metallurgically bonds the block (10) to the manifold (12).

Abstract: In a mechanically assembled type heat exchanger, in which an end portion of an oval tube is inserted into a barring hole of a core plate and expanded to be press fit to the core plate. Then adhesive is potted on the core plate for sealing the press fit portion in the end of the tube. A reinforcing member is formed around the barring hole for increasing the rigidity of the core plate so as to improve the durability of sealing.

Abstract: A heat exchanger for heat exchange between a working fluid and a coolant having an inner casing, an outer casing, and an annular space formed therebetween. A tube bundle including at least one tube formed into a helical coil is located within the annular space. End plates are removably secured and sealed to the ends of the outer casing. Bulkhead fittings are mounted in openings of the end plates to seal the tube ends which pass through the end plates. The bulkhead fittings are sized to permit the end plates to be moved off of the bulkhead fittings in a direction away from the helical coil. The tube bundle may also include a separating plate extending longitudinally between the coils of two tubes within the tube bundle creating two separate passages through which coolant may flow. External tubes may be connected at the tube ends, outside of the outer casing and the end plates, such that the working fluid flows in a parallel single-pass flow or a series double-pass flow through the annular space.

Abstract: A heat exchanger unit has a case made of plastic or resin, and a heat exchanger is accommodated and fixed within the case. Within the case, first terminal ends of the inlet pipe and outlet pipe are connected to the heat exchanger, and second terminal ends of the pipes are fixed to a wall on the case by the external pipe connection portion. The external pipe connection portion has a flange portion formed integrally with the case itself on the wall, and a nut plate.

Abstract: The heat exchanger has a plurality of stacked individual boxes for defining locally an inlet chamber and an outlet chamber for fluid. The heat exchanger includes an insert that comprises an inlet and outlet opening for fluid extended into the chambers by a body arranged for fluid communication of the opening with the first or second chamber. The insert that comprises a common part the body of which is provided with at least two openings capable of communicating with the first and second chambers, and it comprises a separating member for isolating the fluid currents between the opening and the chamber with which the opening must not communicate, the separating member being selected between two different shapes each corresponding to the fluid communication of the opening with one of the chambers.

Abstract: An aluminum alloy article consisting essentially of controlled amounts of iron, silicon, copper, manganese, magnesium, titanium, zinc, zirconium and free machining elements with the balance being aluminum and incidental impurities is adapted for use as a connector block in a heat exchanger assembly. The connector block has a connector block body with at least one machined portion therein and is configured to be brazed to a portion of the heat exchanger, particularly the heat, exchanger header. The aluminum alloy combines the properties of machinability, corrosion resistance, strength and brazeability. A connector block made from the aluminum alloy can be machined to the right configuration and can be brazed to the heat exchanger header to form a high quality brazed joint. In addition, the connector block can withstand the corrosive environment associated with the heat exchanger and has the necessary mechanical properties to interface with other heat exchanger components.

Abstract: A steam generator tube support plate has passageways with inwardly extending lands. Two or more tubes extend through the passageways and are supported by the lands. The tube support plates are variably spaced to provide additional support near the tubesheet and in the distal bends of U-tube bundles. This design provides reduced clogging, pressure drops and tube vibrations.

Abstract: A fluid heater includes a housing, a burner unit disposed in a bottom portion of the housing for burning combustible fuel, a combustion chamber disposed within the housing where the fuel is burned and a heat exchanger disposed substantially within the housing over the combustion chamber. The heat exchanger absorbs heat generated from burning the fuel and conducts the heat to a fluid to be heated. The heat exchanger includes a pair of spaced, parallel, stainless steel tubesheets with a plurality of tubes running therebetween and sealingly received within mating apertures in each of the tubesheets. A plastic front header and a plastic rear header are removably attached to the tubesheets distal to said tubes. The apertures in the tubesheets preferably have forged flanges for increasing the surface contact area with the heat exchanger tubes. The heat exchanger is corrosion resistant due to the combination of corrosion-resistant tubesheets, tubes and headers.

Abstract: A plate type heat exchanger, which may for example be an evaporator for a motor vehicle air conditioning installation, comprises a stack of hollow plates with a pipe connector interposed in the stack. The flow circuit in which the heat exchanger is inserted includes a fluid flow tube coupled to the pipe connection of the heat exchanger by means of a coupling device which includes a clamping ring. This coupling device includes an intermediate sleeve having a cylindrical portion fitted intimately around a cylindrical end portion of the pipe connection, together with another cylindrical portion which serves in effect as an extension of the cylindrical end portion. The clamping ring is engaged around the outer cylindrical portion of the sleeve, so as to clamp the latter around the end of the fluid flow tube, the latter having previously been introduced into the sleeve and the end portion of the pipe connection.

Abstract: A heat exchanger shell closure utilizing a tapered split ring is disclosed. The split ring of the invention has a tapered inner surface which fits into a corresponding tapered groove in a tube sheet barrel. A backup flange fits over the split ring, forcing the split ring into the deepest and forwardmost part of the groove, thereby preventing longitudinal movement of the split ring and the resulting movement and wear of a sealing ring which is held in place by the split ring as the heat exchanger undergoes load variations.

Abstract: This invention relates to a facade plate, method of assembly, assembled heat exchanger, and kit of parts therefor. The facade plate is adapted for securement to at least part of the tube plate of a heat exchanger, the facade plate having apertures conforming to openings in the said part of the tube plate, the facade plate being of a plastic material. The method of mounting the facade plate to the tube plate includes the steps of {i} securing a locking member within the end of each one of many or all of the heat exchanger tubes; {ii} placing the facade plate against the tube plate with the apertures aligned with respective tube plate openings; {iii} selecting a set of tubular inserts which have a part adapted for engagement with a locking member; {iv} passing a respective tubular insert through all or many of the apertures and into the corresponding tube so that the said part engages the locking member.

Abstract: A heat exchanger is made of a metal such as aluminum and for use in the air conditioning apparatuses such as the car coolers and the room air conditioners. A coolant inlet pipe (6) has an end which is forced into a pipe insertion bore (10) of a pipe joint (8) for connection to an external piping, with a cylindrical brazing agent piece (15) being interposed between the outer periphery of the inlet pipe end and the inner peripheral wall of the bore, such that the pipe (6) is brazed integral to the joint (8) by means of the cylindrical piece (15). This cylindrical brazing agent piece (15) is composed of a core layer which has an outer and inner surfaces clad with a brazing agent layer. The pipe (6) and the joint (8) can be preassembled without failing to interpose between them the brazing agent piece (15), so that said pipe and said joint can be brazed one to another surely and at a lowered cost.