Abstract: In at least one embodiment, the invention is a heat exchanger which includes a core, a support structure and a mount. The core is variable in its size and has a lower temperature fluid port and a higher temperature fluid port. The mount is positioned between the core and the support structure, adjacent to the higher temperature fluid port. The mount restrains the core relative to the support structure, such that when the core varies in size it does so either away from or towards the mount. The heat exchanger can also include a deformable connector. The deformable connector is positioned in a manner which allows it and lower temperature fluid port to remain in fluid communication as the core varies in size. The deformable connector can include a bellows, a flexible hose and a braided metal hose. The mount includes a pin and a receiver. The receiver receives the pin so as to restrain the movement of the core. The pin can be attached to the support structure and the receiver defined in the core.

Abstract: A heat exchanger for a heating, ventilation and/or air-conditioning device including a thermal loop equipped with a heat exchanger, is characterized in that at least one of the first and second longitudinal ends (92) of at least one partition plate (20) and/or of at least one end plate (9) is coupled to at least one of the first and second ends of a said orientation plate (2, 20) by means of a damper element (94, 95).

Abstract: A tube is provided with elastically deformable tube deforming sections (tube curved sections), and a fin is provided with the quality of spring so that the fin deforms in accordance to changes of dimension between the tubes. Accordingly, it is possible to weaken (absorb) stress by the tube deforming sections (tube curved sections), and to prevent the fin from separating from the tube even when the tube deforming section (tube curved section) deforms.

Abstract: The invention relates to a heat exchanger having a manifold plate structure. The heat exchanger comprises a first and a second manifold plate. The first and second manifold plates allow a refrigerant communication between an outside of the heat exchanger and another plate. The manifold plates together form a closed flat tube and each of the manifold plates has a pair of cup portions. The first manifold plate has a first slot and the second manifold plate has a second slot. The edge of the first slot has a projected burr portion. The first slot is configured for insertion into a slot of a first adjacent plate that is configured to be connected to the first manifold plate. The length and width of the first slot are less than the length and width of the second slot.

Abstract: In a double heat exchanger having a condenser core and a radiator core, a protrusion is provided on a condenser header tank which contacts a radiator header tank so that a clearance between the condenser header tank and the radiator header tank around the protrusion is in a range of 0.5 mm-1.5 mm. Further, a coating-removing restriction material such as magnesium for restricting the removal of an oxidation coating formed on the surface of a brazing material is added to one of the contact areas of the protrusion and the contact area of the condenser header tank. Thus, it can prevent brazing material from being collected in the contact areas of the protrusion and the condenser header tank by a capillary phenomenon during brazing. Accordingly, the heat-transmitting area between the radiator header tank and the condenser header tank is not increased, and the heat-radiating capacity of the condenser core is increased.

Abstract: At the refrigerant inlet/outlet side surface portion of laminated flat tubes, there is provided a first side refrigerant passage, and in the upper portion of the other side surface portion, there is provided a second side refrigerant passage, and in the lower portion thereof a third side refrigerant passage. A first partition portion is provided in first lower tank portions of the laminated flat tubes, and a second partition portion is provided in second upper tank portions. The first partition portion and the second partition portion respectively divide the laminated first lower tank portions and the second upper tank portions such that the ratio of the number of flat tubes on the refrigerant inlet/outlet side surface portion side, n4, to the number of flat tubes on the opposite side surface portion side, n3, is approximately 2:1.

Abstract: A plate evaporator comprising a stack of pockets (1) each formed from two dished plates (2, 3) delimiting between them a mutually juxtaposed inlet chamber and outlet chamber (6, 7). One at least of the inlet and outlet pipes (17, 18), disposed at a same end (21) of the stack, communicates with the chambers via an end box (10) interposed between the stack and the pipes. Advantageously, the dimensions of the end box allow a mutual vertical stagger of the pipes (17, 18), facilitating their installation and connection.

Abstract: Heat exchanger core comprising flat plate fluid U flows tubes stacked on one another and operatively connected to one another by discrete fluid supply and suction lines. These lines extending through side-by-side tank portions of the tubes to improve structural integrity of the core and respectively have fluid feed and exhaust openings communicating with the tanks and sized to provide even distribution of the heat exchanger fluid to the tubes. With the supply and suction lines, evenly distributing the heat exchanger fluid, tank size and capacity is optimized and the requirement for large capacity deep draw tanks of prior constructions is eliminated.

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: The upstream side ends of fins (16) along the ventilating direction project out relative to the upstream side ends along the ventilating direction of tubes (14) without being allowed to project out beyond the end faces of tanks (2) and (3) along the ventilating direction so as to set the tubes (14) at positions recessed toward the downstream side along the ventilating direction relative to the fins (16), and the downstream side ends of the fins (16) along the ventilating direction are recessed further toward the upstream side along the ventilating direction relative to the downstream side ends of tubes (15) along the ventilating direction.

Abstract: The efficiency of a heat exchanger used in applications where heat conduction between rows of conduits located from front to back of the heat exchanger and provided with common fins (42) is increased where the fins (42) are abutted to adjacent tube runs (22,24,26) in each row and extend from the front (28) to the back (30) of the heat exchanger so each fin (42) is common to each of the rows (22,24,26). Heat flow interrupters (56,58) are located in each fin (42) at locations aligned with spaces (27) between the runs (22,24,26). Each heat flow interrupter (56,58) is defined by a slit (62) extending completely through the fin 42 which is characterized by the absence of the removal of any material of which the fin (42) is made at the slit (62).

Abstract: A heat exchanger and method of making same includes a plate extending longitudinally. The heat exchanger also includes a plurality of apertures forming a fluid inlet and a fluid outlet extending through the plate. The heat exchanger further includes a mechanism forming a restriction to fluid flow through either one of the fluid inlet or the fluid outlet.

Abstract: A heat exchange assembly comprises a plurality of plates disposed in a spaced-apart arrangement, each of the plurality of plates includes a plurality of passages extending internally from a first end to a second end for directing flow of a heat transfer fluid in a first plane, a plurality of first end-piece members equaling the number of plates and a plurality of second end-piece members also equaling the number of plates, each of the first and second end-piece members including a recessed region adapted to fluidly connect and couple with the first and second ends of the plate, respectively, and further adapted to be affixed to respective adjacent first and second end-piece members in a stacked formation, and each of the first and second end-piece members further including at least one cavity for enabling entry of the heat transfer fluid into the plate, exit of the heat transfer fluid from the plate, or 180° turning of the fluid within the plate to create a serpentine-like fluid flow path between points o

Abstract: A heat exchanger for heat extraction of a refrigerating fluid such as CO2, comprising at least one collecting box defined by a solid body (41) with a thick wall capable of resisting the high pressure of said fluid, and communicating with a row of flat tubes (44). In order to limit bulkiness in the width of the heat exchanger, only one part of the length of the cross section of the tubes is located opposite the inner volume of said body, whereby tightness of the fluidic communication between the tubes and the inner volume is obtained by means of a cradle (50) in the form of a shaped strip receiving the body and brazed thereto on the periphery of the tubes. The heat exchanger can be used to air condition passenger compartments in vehicles.

Abstract: A heat exchanger employing a dimple tube is disclosed, in which sufficient strength is provided by improving the processing accuracy of the dimple tube and decreasing the processing error. The tube comprises a plate folded in two so as to make two edges of the plate contact each other and form a flat tube. The plate comprises protrusions provided on each inner wall of the flat tube in a manner such that the heads of opposed protrusions on both the inner walls contact each other. The plate is clad with a brazing filler metal and the protrusions are formed on a surface of the plate before the plate is folded, and the two edges of the plate and the heads of the opposed protrusions are respectively brazed after the plate is folded. A predetermined number of sets of the opposed protrusions, positioned closest to the end of the tube, are larger than the other protrusions in a manner such that their size along the longitudinal direction of the tube is larger.

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: The present invention relates to a heat exchanger in which a plate-shaped refrigerant flow portion which provides an internal refrigerant flow path by overlaying two flat plates formed by drawing and a cooling fin are alternately layered; and comprising an opening portion provided on each of the flat plates and which is connected with the refrigerant flow path; and a continuous space for the flow of the refrigerant which is provided by connecting the opening portions of adjacent refrigerant flow portions. The refrigerant which flows in the space is distributed to the respective refrigerant flow paths through the opening portions. The heat exchanger further comprises a means for improving the heat exchange capacity, and this means is, for example, a narrowing means which is provided at the upstream end part of the space in order to uniformly distribute the refrigerant to the refrigerant flow paths.

Abstract: The present invention relates to a heat exchanger in which a plate-shaped cooling medium flow portion (11) provides an internal cooling medium flow path inside by laminating two flat plates (13, 14) subjected to drawing and a cooling fin are alternately laminated, a cooling medium inlet (15) for allowing a cooling medium to flow into the cooling medium flow path and a cooling medium outlet (16) for allowing the cooling medium passing through the cooling medium flow path to flow out are formed in said two flat plates, and the cooling medium flowing from the cooling medium inlet to the cooling medium flow path is passed through said cooling medium flow path and is then allowed to flow out of the cooling medium outlet.

Abstract: A plate and fin type heat exchanger is disclosed which can be made in any convenient size with minimum tooling required. The heat exchanger is made from a plurality of stacked plate pairs having raised peripheral edge portions to define flow channels inside the plate pairs. The plates of the plate pairs are formed with offset, diverging end flanges that space the plate pairs apart. A U-shaped channel envelops the plate end flanges to form part of a manifold at each end of the plate pairs. End caps or plates close the open ends of the U-shaped channels to complete the manifolds, and inlet and outlet openings are formed in the manifolds as desired to complete the heat exchanger.

Abstract: Disclosed is a plate for stack type heat exchangers and heat exchanger using such plates. A plurality of small protrusions 25 formed on the plate 2 are regularly arranged in the pattern of a diagonal lattice so that the ratio of the area S of the rectangle (which is defined by the longitudinal partition protrusion, a flange and two center lines passing through two neighboring round protrusion rows) to the width L of the plate falls within the range of 0.89 mm≦S/L≦1.5 mm. The outlet-side flange portion of the flange of the plate and a round protrusion of the round protrusions nearest to the outlet-side flange portion are preferably arranged so that the width Gs of the passage between the outlet-side flange portion and the nearest round protrusion falls within the range of 0.15 mm≦Gs≦1.6 mm.

Abstract: An evaporator for an HVAC system is disclosed wherein an upstream to downstream airflow is directed through the evaporator for inducing a transfer of thermal energy between the airflow and a fluid circulating in the evaporator. The evaporator includes at least two cores adjacent one to the other. Each of the cores defines a core inlet and a core outlet and the cores are arranged such that the core inlet of the first core is positioned at an opposite end from the inlet of the second core. Correspondingly, the outlet of the first core is positioned at an opposite end from the outlet of the second core. The evaporator inlet is in fluid communication with the first core inlet and the second core inlet and the outlet is in fluid communication with the first core outlet and the second core outlet.

Abstract: A plate-fin heat exchanger includes a stacked array of cells. Each cell includes top and bottom sheets defining manifolds and header finned members disposed between the top and bottom sheets. The top and bottom sheets include substantially planar portions, diverging portions angled with respect to the planar portions, and divergence edges defined between the planar and diverging portions. The header finned member extends beyond the divergence edges of the top and bottom sheets and is supported in cantilevered fashion within the manifold.

Abstract: A heat exchanger, e.g. an evaporator, has end plates arranged at two opposite axial ends and at least a part of which is secured, particularly by brazing, to an orientation plate. At least one edge of said part has no region which is not secured to said orientation plate.

Abstract: An evaporator (10) with opposed pairs of generally vertically oriented flow tube surfaces (14) has corrugated air fins in which the tube surface spacing c, the interior radius r of a crest (20) joining adjacent pairs of fin walls (18), the fin pitch p separating adjacent crests (20), and the length l of louvers (22) cut out of the fin walls (18) bear the following relationship: 0≦r/c≦0.057, 0.89≦l/c≦1.01, and 0.29≦p/c≦0.43. This has been found to substantially improve condensate drainage, while not significantly penalizing heat transfer or air side pressure drop.

Abstract: The device is used to cool a vehicle appliance, in particular a battery or a fuel cell, by means of a coolant. It has a plurality of identically designed cooling elements, through which coolant can flow, which can be brought into bearing contact to cool at least one component of the vehicle appliance. It includes a first cooling-element side and a second cooling-element side which is on the opposite side from the first cooling-element side. The cooling-element sides have connection openings, which form inlet and outlet openings for the coolant and are in communication with the interior space of the cooling element. In this arrangement, it is provided for the first and second cooling-element sides each to have at least two connection openings.

Abstract: Arrangement of inlet and outlet pipes for an evaporator A plate evaporator comprising a stack of pockets (1) each formed from two dished plates (2, 3) delimiting between them a mutually juxtaposed inlet chamber and outlet chamber (6, 7). One at least of the inlet and outlet pipes (17, 18), disposed at a same end (21) of the stack, communicates with the chambers via an end box (10) interposed between the stack and the pipes. Advantageously, the dimensions of the end box allow a mutual vertical stagger of the pipes (17, 18), facilitating their installation and connection.

Abstract: A module for a heat exchanger comprises a first generally planar member having a first opening at an opposite end with respect to a second opening. A second generally metallic planar member has a first opening at an opposite end with respect to a second opening. The first generally planar member may be aligned with the second generally planar member to form a cavity in communication with the first opening and the second opening. A pattern of elevated regions may extend from the first generally planar member and the second generally planar member. The pattern of elevated regions has a regional longitudinal axis that is tilted with respect to a reference longitudinal axis of at least one of the first generally planar member and the second generally planar member. A flow longitudinal axis may be tilted with respect to the reference longitudinal axis to facilitate a cross-flow of the fluid with respect to the elevated regions.

Abstract: A heat exchange cell for a recuperator includes top and bottom plates sandwiching a matrix finned member and a pair of header finned members. The top and bottom plates each include a pair of manifold openings, and the header finned members each include a curved free edge following the curvature of an associated manifold opening. The header finned member includes a high fin density portion along the free edge and a low fin density portion communicating with the high fin density portion. The dual fin density header finned member thus provides increased structural strength along the free edge and provides a low pressure drop through the low fin density portion.

Abstract: An evaporator and method of making same includes a first end tank, a second end tank spaced from and opposing the first end tank, and a plurality of extruded fluid carrying tubes extending between and in fluid communication with the first end tank and the second end tank. The first end tank and the second end tank are formed as stampings.

Abstract: In at least one embodiment, the invention is a heat exchanger with increased stiffness to prevent buckling of the core and which carries externally produced loads without damage to the core. In some embodiments, the present invention is a heat exchanger having a core with a heat exchange portion, and a shaft with at least part of it positioned in the core to increase the stiffness of the core. The shaft is positioned at least adjacent to the heat exchange portion of the core. The shaft is also located to limit movement of the heat exchange portion and to receive loads from the heat exchange portion. The shaft can be positioned through some or the entire heat exchange portion of the core. In another embodiment, the heat exchanger includes a core, a duct in fluid communication with the core, a load bearing member positioned adjacent to the core, and a mount which attaches the duct to the load bearing member.

Abstract: A laminated type heat exchanger including a refrigerant inlet tank and a refrigerant outlet tank. The inlet tank has inlet chambers and a refrigerant passage passing through the inlet chambers, and the outlet tank has outlet chambers and a refrigerant passage passing through the outlet chambers. The heat exchanger includes refrigerant pipes each having one end which is connected to the inlet chamber and the other end which is connected to the outlet chamber, and a refrigerant gate portion for flowing the refrigerant into the inlet tank and from the outlet tank. The heat exchanger also includes a dispersion pipe which is inserted in the inlet tank refrigerant passage. The dispersion pipe is about ⅓ to ¼ of the length of the inlet tank refrigerant passage, and the sectional area of the dispersion pipe is smaller than that of the inlet tank refrigerant passage.

Abstract: A heat-exchanger tube block is disclosed having at least two header tubes (6, 7), which are C-shaped in cross section and each of which has a continuous longitudinal slot (10, 11). Flat tubes (2a, 2b) are inserted into the header-tube longitudinal slots. A cover-plate element (12) is provided which has a plurality of C-shaped openings and is fitted over one end of the at least two header tubes, so that the header tubes respectively fit into one of the openings and are secured in a fluid-tight manner. The tube-block can be used, for example, in an evaporator of CO2 air-conditioning installations for a motor vehicle.

Abstract: A fluid cooling device carrying cooling fins thereon also carries a plurality of series of plates one above the other. Each of the series of plates is composed of an upper and a lower plate which are in spaced relationship with one another. The space between the upper and lower plates of each of said series of plates define a channel therewithin which is connected to the corresponding channels in each of the series of plates with all of said channels being also connected to inlet and outlet openings. The portions of each of the plates within each of the channels defined therein carrying projecting baffles therewithin which are adapted to cause turbulence in the fluid to be cooled which passes through said channels from the inlet opening to the outlet opening of the device.

Abstract: A heat exchanger and method of making a heat exchanger which includes providing a header having openings adapted to receive a plurality of tubes. The tubes are inserted into the header openings, then, substantially uncured fluid sealing material is applied to at least the inner surfaces of the header openings. The inner surfaces of the header openings and the outer surfaces of the tubes are connected by the sealing material. The method further includes curing the sealing material after the tubes are inserted into the header openings. The sealing material thus provides a flexible, bonded, liquid tight, tube-to-header joint.

Abstract: A heat exchanger of the multi-flow type is provided with baffle members which are adapted to impart a zigzagging flow to the heat-exchange fluid in motion inside a flat tube and define, in conjunction with the inner wall of the flat tube, a flow path of a cross-sectional area having an equivalent diameter in the range of 0.4 to 1.5 mm. This heat exchanger excels in heat exchange ability and in facility of manufacture and assemblage.

Abstract: An evaporator and method of making same includes a first end tank, a second end tank spaced from and opposing the first end tank, and a plurality of extruded fluid carrying tubes extending between and in fluid communication with the first end tank and the second end tank. The first end tank and the second end tank are formed as stampings.

Abstract: A heat exchange cell for a recuperator includes top and bottom plates sandwiching a matrix finned member and a pair of header finned members. The top and bottom plates each include a pair of manifold openings, and the header finned members each include a curved free edge following the curvature of an associated manifold opening. The header finned member includes a high fin density portion along the free edge and a low fin density portion communicating with the high fin density portion. The dual fin density header finned member thus provides increased structural strength along the free edge and provides a low pressure drop through the low fin density portion.

Abstract: A fluid cooling device carrying cooling fins thereon also carries a plurality of series of plates one above the other. Each of the series of plates is composed of an upper and a lower plate which are in spaced relationship with one another. The space between the upper and lower plates of each of said series of plates define a channel therewithin which is connected to the corresponding channels in each of the series of plates with all of said channels being also connected to inlet and outlet openings. The portions of each of the plates within each of the channels defined therein carrying projecting baffles therewithin which are adapted to cause turbulence in the fluid to be cooled which passes through said channels from the inlet opening to the outlet opening of the device.

Abstract: A heat exchanger employing a dimple tube in which sufficient strength is provided by improving the processing accuracy of the dimple tube and decreasing the processing error. The tube includes a plate folded in two so as to make two edges of the plate contact each other and form a flat tube. The plate comprises protrusions provided on each inner wall of the flat tube in a manner such that the heads of opposed protrusions on both the inner walls contact each other. The plate is clad with a brazing filler metal and the protrusions are formed on a surface of the plate before the plate is folded, and the two edges of the plate and the heads of the opposed protrusions are respectively brazed after the plate is folded. A predetermined number of sets of the opposed protrusions, positioned closest to the end of the tube, are larger than the other protrusions in a manner such that their size along the longitudinal direction of the tube is larger.

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 stacked-type, multi-flow heat exchanger includes a plurality of heat transfer tubes. Each of the heat transfer tubes includes a first tube plate and a second tube plate connected to the first tube plate, such that the first tube plate and the second tube plate form a refrigerant path within the heat transfer tube. Each of the heat transfer tubes also includes an inner fin having a wave shape, positioned within the refrigerant path and extending in a longitudinal direction along the refrigerant path. Moreover, the heat exchanger includes a plurality of outer fins. The plurality of outer fins and the plurality of heat transfer tubes are stacked alternately. The heat exchanger further includes a plurality of projection portions formed on the first tube plates and the second tube plates, such that the projection portions project into the refrigerant path and extend in an oblique direction relative to the inner fin. Further, the inner fin is connected to the plurality of projection portions.

Abstract: Difficulties in obtaining consistent bonds of high quality between side pieces and tubular headers (10), (12) in heat exchangers are avoided in a side piece (42) that extends between the headers (10), (12) and which has circular recesses (48) at each end (44), (46). The recesses (48) define resilient fingers (56), (58) which may separate to receive the ends of the headers (10), (12) and frictionally grasp the same, eliminating the need for fixturing at this location and assuring a strong consistent gripping of the headers (10), (12), by the end piece (42) to assure consistent bonds of high quality.

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 tube block is disclosed having at least two header tubes (6, 7), which are C-shaped in cross section and each of which has a continuous longitudinal slot (10, 11). Flat tubes (2a, 2b) are inserted into the header-tube longitudinal slots. A cover-plate element (12) is provided which has a plurality of C-shaped openings and is fitted over one end of the at least two header tubes, so that the header tubes respectively fit into one of the openings and are secured in a fluid-tight manner. The tube-block can be used, for example, in an evaporator of CO2 air-conditioning installations for a motor vehicle.

Abstract: An evaporator used in a vehicle air conditioner has vertical plates with a hybrid corrugated fin between the plates. The leading section of the fin as horizontally oriented corrugations, as is normal, while the trailing section has vertically oriented corrugations. Air passes through louvers in the vertical corrugations, and their vertical orientation aids in water drainage.

Abstract: In a refrigerant heat exchanger, a flow direction of refrigerant flowing through tubes in each of first and second units is opposite to that flowing through tubes in each of third and fourth heat-exchanging units arranged at upstream air sides, the flow directions of refrigerant flowing through first header tanks for distributing refrigerant into the tubes of the first and fourth units are the same, and the flow directions of refrigerant flowing through first header tanks for distributing refrigerant into the tubes of the second and third units are the same. Accordingly, even when a flow direction (flow rate) of refrigerant is small, a uniform temperature distribution of air can be obtained in the refrigerant heat exchanger.

Abstract: A heat exchanger includes a core adapted to heat air with counter-flowing hot gases. Substantially isothermal hot and cool portions of the core are interconnected by a matrix portion exposed to a temperature gradient. A top sheet is positioned over the core and includes first and second ends and a middle portion between the first and second ends. The middle portion includes a window and compliant ligament portions extending alongside the window and interconnecting the first and second ends. The first and second ends of the top sheet are positioned over the isothermal cool and hot portions of the core, respectively, and the middle portion of the top sheet is positioned over the matrix portion of the core. The compliant ligament portions of the top sheet are deflectable in response to the temperature gradient across the matrix portion of the core to reduce strain on and deflection of the first and second ends of the top sheet.

Abstract: A heat exchanger and method of making same includes a plate extending longitudinally. The heat exchanger also includes a plurality of apertures forming a fluid inlet and a fluid outlet extending through the plate. The heat exchanger further includes a mechanism forming a restriction to fluid flow through either one of the fluid inlet or the fluid outlet.

Abstract: A radial flow heat exchanger for heating or cooling a fluid includes a sealed fluid manifold for passage of fluid. A sealed fluid receiving hub is spaced interiorly of the interior peripheral portion of the manifold and includes a passageway for passage of fluid into or out of the heat exchanger. A plurality of separate and spaced fluid flow tubes are disposed between the manifold and the hub. Each of the tubes are in sealed fluid communication with the manifold at one end and the other end is in sealed fluid communication with the hub. A fin assembly is positioned between the manifold and the hub and includes a heat conducting material arranged at spaced intervals between the manifold and the hub, the heat conducting material including a plurality of spaced apertures through which tubes pass.

Abstract: A twisted-louver high performance heat exchanger fin assembly includes a plurality of fin elements each having a louver formed therein. The louvers include first and second portions connected by a twisted portion such that the first and second portions cross in an X-shaped profile.