Abstract: A heat exchanger for a CO2 refrigerant includes at least three rows of tube groups including a plurality of tubes having an independent refrigerant path, first and second header pipes including a header where a plurality of tube insertion holes into which the tubes are inserted are formed and a tank having partition walls formed along a direction of the flow of a refrigerant, wherein a plurality of return holes are formed in the partition walls, end caps sealing both end portions of the firs and second header pipes, a coupling reinforcement portion installed at least one of the first and second header pipes and reinforcing a coupling force of the header and the tank, a refrigerant inlet pipe connected to the first or second header pipe through which the refrigerant enters, and a refrigerant outlet pipe connected to the first or second header pipe through which the refrigerant is exhausted.

Abstract: Separators are prevented from being moved from a correct position before completion of soldering. After calking portions 31a, 32a, 43 are plastically deformed and the separator 31, 32 are mechanically fixed on a header tank 40 by calking, the separators 31, 32 are coupled to the header tank 40 by soldering. Thereby, as the separators 31, 32 are prevented from being moved from the correct position with respect to the header tank 40 before completion of soldering, it is possible to prevent defects in soldering where gaps are created in coupled portions.

Abstract: A cylindrical heat exchanger member can be formed from multiple stacked ring shaped tubular members wherein an inlet and outlet of each ring shaped member terminate at a single header interface, thus permitting access to the inlet and outlet of each ring shaped member at a single location which enables rapid configuration of an combination of flow paths through the multiple ring shape members as well as simple and efficient cleaning of each ring shaped member.

Abstract: A turbulizer, such as a helical fin about a core pipe, is located in a heat exchanger manifold to distribute liquid phase fluid through a plurality of tube members connected to the manifold.

Abstract: A folded, elongated tube (28) is provided for use in a heat exchanger (10, 11). The tube (28) has a flattened cross section with a minor dimension (d) and a major dimension (D). The tube (28) includes a pair of parallel tube runs (36), and a folded section (40) connecting the pair of tube runs (36). The major dimensions (D) of the tube runs (36) lie in a common plane. The folded section (40) includes a U-shaped bend (42), a first twist (44), and a second twist (46). The U-shaped bend (42) includes a straight section (48) extending between two curved sections (50, 52), and has its major dimension (D) extending substantially transverse to the major dimension (D) of the tube runs (36). The first twist (44) connects one of the tube runs (36) to the curved section (50), and the second twist (46) connects the other tube run (36) to the other curved section (52) of the U-shaped bend (42).

Abstract: A stacked-type, multi-flow heat exchanger includes a first header pipe and a second header pipe formed opposite the first header pipe. The heat exchanger also includes a plurality of heat transfer tubes extending between the first header pipe and the second header pipe, such that the first header pipe and the second header pipe are in fluid communication via the heat transfer tubes. The heat exchanger further includes a plurality of fins alternately stacked with the plurality of heat transfer tubes. Moreover each of the ends of the first header pipe includes a first tapered portion having a reduced diameter relative to a diameter of a center portion of the first header pipe. In another embodiment, each of the ends of the second header pipe includes a second tapered portion having a reduced diameter relative to a diameter of a center portion of the second header pipe.

Abstract: A heat exchanger apparatus includes a first and second coolant tanks spaced apart from each other, a plurality of heat exchanging tubes extending between the tanks for enabling coolant to flow from the first coolant tank to the second coolant tank and to be cooled in said tubes, and a coolant supply/return tube for enabling coolant to flow from the second coolant tank to the first coolant tank. The supply/return tube has a substantially circular cross-section. The supply/return tube has opposite end portions inserted into complementary openings in the inlet coolant reservoir and the first tank. In order to provide the proper, predetermined orientation of the supply/return tube in the heat exchanger apparatus, the supply/return tube has opposite locating members each adjacent to the end portions of the supply/return tube, so that a small, predetermined length of the end portions of the supply/return tube protrudes inside the supply/return tube.

Abstract: There is provides a heat exchanger comprising: a plurality of tubes (110) stacked on each other; and a pair of header tanks (140), each header tank (140) having a flow section (151) in which fluid flows, extending in a direction of stack of the tubes (110), wherein both end sections (111) of the tubes (110) in the longitudinal direction are joined to the pair of header tanks (140), the flow section (151) of each header tank (140) and the inside of each tube (110) are communicated with each other, a tip position (a) of the tube end section (111) is arranged in an outside region of the flow section (151), and an inner wall width size (b) of the flow section (151) is smaller than a size (c) in the width direction of the header tank (140) at the tube end section (111).

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 heat exchanger, particularly a flat-tube heat exchanger for a motor vehicle, which includes two coolant boxes and a tube block with an inlet tube attached to one of the boxes and an outlet tube attached to another of the boxes, and wherein each tube extends at least in part along one longitudinal side of the associated box and has at least one radial opening which communicates with a side opening formed in the box.

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: Radiator caps (266) and radiator tubes (211) are heat brazed with an ingot Z of a sacrificial material being disposed in the interior of a radiator tank main body (234), whereby, as the ingot Z of the sacrificial material is heated while being surrounded by the radiator tank main body (234), the evaporated sacrificial material is allowed to adhere to internal surfaces of the radiator tank main body (234) relatively uniformly, the sacrificial material so adhering to the internal surfaces being then allowed to be radiated into aluminum constituting the radiator tank main body (234) to thereby form an alloy layer (a corrosion preventing layer) containing therein the sacrificial material heavily on the internal surface of the radiator tank main body (234).

Abstract: A laminated-type heat exchanger has plural flat tubes in which refrigerant flows and plural corrugated fins each of which is disposed between adjacent two flat tubes. In the heat exchanger, plural protrusion portions protrude from an outer wall surface of each flat tube toward the corrugated fins, so that recess portions through which air flows are provided at least between adjacent protrusion portions. The protrusion portions are provided such that air meanderingly flows through the recess portions from an upstream end side to a downstream end side of each tube in a flow direction of air.

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: A heat exchanger (10) preferably provides supercritical cooling to the refrigerant of a transcritical cooling system (12). The heat exchanger (10) includes a pair of elongated headers (20, 22) having longitudinal axes (24, 26) disposed substantially parallel to each other, a plurality of elongated tubes (28) spaced in side-by-side relation along the longitudinal axes (24, 26) of the headers (20, 22), and serpentine fins (30) extending between adjacent pairs of the tubes. Each of the tubes (28) has a first end (31) connected to the header (20) and a second end (32) connected to the other header (22) to the headers (20, 22).

Abstract: The invention concerns a spiral heat exchanger, consisting of a series of spiral plates spaced apart from one another by spacer elements (3), wherein the spiral plates are formed by a coiled flattened tubular element and consisting of at least a sheet of material (1) whereof the edges (1a, 2b) are sealingly assembled by linking means (4) which extend parallel to the longitudinal axis (yy′) of the sheet (1). Said exchanger is characterized in that the flattened tubular element comprises on its outer surfaces ribs (3) inclined relative to its transverse axis (xx′).

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 condenser core portion carries out a heat exchange between refrigerant and air. The condenser core portion includes a plurality of condenser tubes through which the refrigerant flows and condenser fins disposed between each pair of adjacent condenser tubes. A radiator core portion is disposed in series with the condenser core portion in an external fluid flow direction with a predetermined clearance therebetween, to carry out a heat exchange between engine coolant and the air. The radiator core portion includes a plurality of radiator tubes through which the engine coolant flows and radiator fins disposed between each pair of adjacent radiator tubes. A connecting portion integrates each of condenser fins and radiator fins. The condenser fins disposed at an upper area of the condenser core portion introduce cooling performances more than the condenser fins disposed at a lower area thereof.

Abstract: An automobile climate control system having a liquid dispersing device to allow coolant to flow. The system also utilizes a heat exchanger to cool the liquid. A manifold block handles the transfer of coolant between the coolant dispersing device and the heat exchanger. The manifold block is in communication with the heat exchanger and the coolant dispersing device; and at least one clasp connects the manifold block to the heat exchanger. A fitting clasp made from the clad material couples the heat exchanger to the at least one clasp.

Abstract: The invention relates to a tube for a heat exchanger through which a fluid flows, intended to promote heat exchange between an external medium and said fluid, formed by at least two plates 4, 5 connected to each other in order to define a circulation duct, the cross section of which is a cross section for passage of said fluid, said circulation duct having a fluid inlet orifice 13 and a fluid outlet orifice 14, wherein said tube comprises a means 12 for partially blocking the circulation duct intended to keep the passage cross section of said duct substantially constant between the inlet orifice 13 and the outlet orifice 14.

Abstract: A flat tube for use in a heat exchanger includes a reversal bend section connected between parallel extending tube sections. The reversal bend section extends from a plane of the tube sections by a distance less than a width of the tube sections. The tube sections can be straight or serpentine. A plurality of the flat tubes can be stacked and connected to collector tubes to form a heat exchanger for use as an evaporator in a vehicle air conditioning system. Corrugated ribs are positioned between adjacent flat tubes for increased heat conduction.

Abstract: A heat exchanger manifold (10) and method of forming a tube port (50) on the manifold (10). The manifold (10) comprises first and second walls (12,14) that define an internal passage (18) and an outer cross-sectional shape of the manifold (10). The first wall (12) of the manifold (10) has a concave outer surface in which the tube port (50) of the manifold (10) is to be formed, while the second wall (14) has a convex outer surface. The tube port (50) is formed in the concave first wall (12), such as by piercing. The shapes of the first and second walls (12,14) promote the ability of the manifold (10) to resist deformation when forming the tube port (50) in the first wall (12).

Abstract: An evaporator comprises a pair of upper and lower horizontal header tanks, a group of heat exchange tubes arranged laterally of the evaporator in front and rear two rows and each connected to the upper header tank and the lower header tank respectively, and a vertical partition wall provided inside the upper header tank and extending laterally of the evaporator so as to form sectioned header chambers for causing a refrigerant to flow through each pair of front and rear adjacent heat exchange tubes in directions opposite to each other. An inlet is provided for a liquid-vapor mixture refrigerant in a sectioned rear header chamber, and an outlet is provided for vaporized refrigerant in a sectioned front header chamber. The evaporator is 3 to 30% in channel opening ratio.

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: 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: The invention relates to a flat tube of a heat exchanger in heating installations or of a radiator of a motor vehicle which is folded from a flat sheet metal of aluminum or an aluminum alloy and across the respective flow of which spacers or the flat sides of the flat tube brazed or soldered to one another are distributed, which are designed as dents of the flat sides of the flat tube on one or both sides. According to the invention it is provided that in the same flow in addition to the spacers embossments freely projecting into the flow are distributed as turbulence-generating flow obstacles at least at one flat side of the flat tube.

Abstract: A tank of a condenser for an air conditioning system of an automotive vehicle. The tank comprises a cylindrical hollow tank main body which is formed with an arcuate cutout formed through a wall of the tank main body. A partition plate includes generally semicircular large and small diameter sections which are integral with each other to be formed into a generally disc-shape. Two projections are radially outwardly protrude respectively from opposite end portions of the generally semicircular large diameter section. During production of the tank, the partition plate is temporarily fixed to the tank main body by riveting the two projections in a state in which the partition plate has been inserted through the cutout of the tank main body, and the partition plate is brazed to the tank main body in a state in which the plate has been temporarily fixed.

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: Parallel flat tubes are juxtaposed in a direction perpendicular to their greater axis, spaced from one another, the internal space of the tubes being divided by intercalary strips of a thermally conducting material into parallel first flowing channels as first flowing paths for a first fluid, a second fluid flowing through spaces between adjacent flat tubes.

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: 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 which is particularly useful as an evaporator has a first plurality of stacked plate pairs with cooling fins therebetween. A second plurality of stacked plate pairs is located adjacent to the first. Each plurality of plate pairs has enlarged plate end portions which together define flow manifolds. The first plate pairs have a first inlet manifold and a first outlet manifold. The second plate pairs have a second inlet manifold and second outlet manifold. The first outlet manifold is joined to communicate with the second outlet manifold. The second inlet manifold is joined to communicate with the first inlet manifold, but a barrier is located between the first and second inlet manifolds. The barrier has an orifice to permit a portion only of the flow in the first inlet manifold to pass into the second inlet manifold to produce a more uniform flow distribution inside the heat exchanger.

Abstract: A heating, ventilation and/or air-conditioning device has a heat exchanger consisting of a stack of orientation plates (1, 20) having a first and a second opposite longitudinal ends, certain orientation plates having separation elements intended to divert a flow of cooling liquid circulating in an axial direction of the heat exchanger so as to direct it to a channel region in which it travels from one said end to the other in a longitudinal direction of the orientation plates (1, 20). At least one separation element has at least one stiffening means (26′) integral at least with one region of said separation element (6, 26).

Abstract: Plural heat-exchanging plates for forming an evaporator have plural projection ribs. The projection ribs protrude toward outside of each pair of the heat-exchanging plates to form therein refrigerant passages through which refrigerant flows, and to form an air passage between adjacent pairs of the heat-exchanging plates. The projection ribs protrude from flat surfaces of the heat-exchanging plates toward the air passage to disturb a straight flow of air. The projection ribs are provided in each of the heat-exchanging plates to have a protrusion pitch (P1) between adjacent two, and the protrusion pitch is set in a range of 2-20 mm. Further, each of the heat-exchanging plates has a thickness of in a range of 0.1-0.35 mm, and a passage pitch (P2) between the refrigerant passages is in a range of 1.4-3.9 mm. Thus, in the evaporator formed by only using the plural heat-exchanging plates, a sufficient heat-exchanging performance can be obtained.

Abstract: In a heat exchanger achieving a smaller width and constituted as a two-path heat exchanger having a first path through which the coolant travels from a first tank group to a second tank group and a second path through which the coolant travels from a third tank group to a fourth tank group to improve the temperature distribution in the heat exchanger and the heat exchanging capability, the coolant flows in opposite directions in the first path and the second path, the high-temperature area in the first path and the low temperature area in the second path are aligned with each other along the direction of the airflow and the high temperature area in the second path and the low temperature area in the first path are aligned with each other along the direction of airflow.

Abstract: Disclosed is a condenser and especially a tube therefor which is particularly suited for use in condensers that operate at operating pressures of approximately 20 bar. The condenser is a flat-tube condenser having tubes of substantially flat cross section extending between header tubes and cooling fins supported on the flat surfaces of the tubes. The tubes have a substantially flat cross section and a plurality of flow channels disposed side by side. The flow channels are substantially circular and have a hydraulic diameter of from 1.10 mm to 1.30 mm. Tubes of flat cross section and circular flow channels disposed in series operate with a particular advantageous effect in serpentine condensers.

Abstract: A heat exchanger a width dimension of which is much larger than a height dimension, in which an heat-exchanging medium flow resistance in a heat exchanging core portion is suppressed from increasing, and discharged air temperature is made uniform in the width direction of the heat-exchanging core portion. The heat-exchanging core portion is divided into a first core portion and a second core portion. The hot water in the first core portion and hot water in the second core portion flow in an opposite direction to each other. Thus, even when the heating heat exchanger, the width dimension of which is much larger than the height dimension, is used, the air temperature is prevented from varying in the width direction. Further, as the heat-exchanging medium flows in the first and second core portions in parallel, the heat-exchanging medium flow resistance is suppressed from increasing.

Abstract: Parallel flat tubes are juxtaposed in a direction perpendicular to their greater axis, spaced from one another, the internal space of the tubes being divided by intercalary strips of a thermally conducting material into parallel first flowing channels as first flowing paths for a first fluid, a second fluid flowing through spaces between adjacent flat tubes.

Abstract: A condenser includes a pair of headers 11 and a plurality of heat exchanging tubes 12 disposed between the headers 11 with their opposite ends connected to the headers 11. The plurality of heat exchanging tubes 12 are grouped into three paths P1-P3 by partitions 16. A refrigerant introduced from a refrigerant inlet 11a provided at the lower portion of one of headers passes upwardly through the paths P1-P3 in sequence, and flows out of a refrigerant outlet 11b provided at an upper portion of one of headers. The cross-sectional area of each path decreases stepwise towards a downstream side path, and the reduction rate of the cross-sectional are of the downstream side path of the adjacent two paths to the cross-sectional area of the upstream side path thereof is set to 20%. Thereby, the cooling performance can be achieved.

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 core section (10) of a condenser is formed such that a plurality of heat exchanging tubes (4), while being vertically arranged in multiple stages, are disposed between a pair of header pipes (2, 3). A reservoir tank (6) is joined to the header pipe (3). The header pipe (3) is communicatively connected to the reservoir tank (6) by a refrigerant passage of a connection member (40). The connection member (40) connects a portion of the header pipe (3) which is out of a joining portion of the header pipe (3) where it is joined to the reservoir tank (6) to a portion of the reservoir tank (6) which is out of a joining portion of the reservoir tank (6) where it is joined to the header pipe (3).

Abstract: A plurality of parallel flat tubes are juxtaposed in a direction perpendicular to their greater axis at predetermined distance the one from the other, the internal space of which being divided by means of intercalary means of a thermally conducting material into a plurality of first flowing channels that are parallel and constitute first flowing paths for a first fluid, a second fluid flowing through spaces between adjacent flat tubes.

Abstract: In the heat exchanger for motor vehicles with ribbed flat tubes, the tube interior space thereof is each connected with headers, a first of which is arranged in the region of the first ends and a second is arranged in the region of the second ends of the flat tubes. The internal heat exchange fluid can be admitted to the flat tubes in an individual or group-wise sequence alternately at their first ends from the first header and at their second ends from the second header by each header comprising a supply and a return of the corresponding heat exchange fluid. The ends of the flat tubes opposed to their header have a U-shaped flow reverse in the flat tube.

Abstract: The present invention provides a heat-exchange coil assembly making it possible to enlarge a heat conduction area within a limited volume by lowering the pitch between heat-exchange coils to a minimum level without providing a welding space. The heat-exchange coil assembly comprises an inlet header 2 at an end section thereof, an inlet tube 3 for inletting a heat exchange medium provided in a drum, an outlet header 4 located with a space from the inlet header at an end section thereof, and a plurality of heat-exchange coils with the outlet tube 5 for outletting a heat-exchange medium from the drum, inlet header 2, and outlet header 4 communicated to each other and also having a common center line, in which the heat-exchange coils are alternately linked to both sides of the inlet header 2 and outlet header 4.

Abstract: A laminate-type heat exchanger includes a core 10 formed by a plurality of plate-shaped tubular elements 20 laminated in a thickness direction thereof. Each tubular element 20 is provided with two refrigerant passages 25a and 25b extending in a longitudinal direction thereof and arranged fore and aft. The core 10 includes a plurality of passes P1 to P4 each formed by a prescribed number of the refrigerant passages arranged in the width direction of the core 10 and a turn portion T formed between the upper portions of the second pass P2 and the third pass P3. At a prescribed portion of the turn portion T, a refrigerant flow resisting portion including a semi-restricting passage 43 and/or an interrupting passage 44 is provided. The refrigerant passed through the second pass P2 is restricted by the refrigerant flow resisting portion when passing through the turn portion T to be equally distributed. Then, the refrigerant is introduced into the third pass P3 in an equally distributed manner.

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: The invention relates to a flat tube heat exchanger with two or more flows for motor vehicles with a deflecting (or reversing) bottom for deflecting (or reversing) adjacent flows of the flat tubes. According to the invention, it is provided that the deflecting bottom is resolved into deflecting bowls individually assigned to each flat tube, which bowls are connected to one another only via their connection to the respectively assigned flat tubes. The invention also relates to a process for manufacturing such a flat tube beat exchanger by pulling off, straightening and cutting into sections the flat tubes from a coil, mechanically pre-assembling the flat tube heat exchanger from its structural parts including the flat tubes and soldering or brazing. Here, it is provided that the deflecting bowls are mechanically pre-assembled with the flat tubes after they have been cut into sections and before pre-assembling the flat tube heat exchanger with the flat tubes.