Abstract: A heat-dissipating member includes a heat-dissipating section which is plate-shaped and which is attachable to a heat source directly or indirectly and also includes a plurality of heat-dissipating projections extending from the heat-dissipating section. The heat-dissipating projections are formed by louvering the heat-dissipating section so as to have predetermined heights. The heat-dissipating projections are arranged in increasing order of height in the direction from one end of the heat-dissipating section to an end of the heat-dissipating section that is opposed to the one end. A thermal head includes a plurality of heating elements arranged thereon and a head mount attached to the above heat-dissipating member directly or indirectly.

Abstract: A serpentine fin for assembly between tubes in a heat exchanger core, and a method of making same from a metal strip. The strip edges have a hem comprising a double thickness of the strip material extending inward from the edge. The metal strip has folds extending across the strip width such that the strip forms a serpentine shape, with the folds being adapted to contact the tubes in the heat exchanger core. Multiple rows of split louvers are disposed between adjacent folds. Each row of split louvers comprises louvers having openings extending in the direction of the strip length and formed in a pair of adjacent, spaced louver banks. Ribs are disposed parallel to the louver openings adjacent the strip edges and in at least one center portion of the strip between the strip edges, and extend across the pair of louver banks.

Abstract: In a heat exchanger, a core has a first core portion including first tubes and a second core portion including second tubes. The first tubes defines first passages through which an internal fluid flows and the second tubes defines second passages through which the internal fluid passed through the first passages flows. A flow direction of the internal fluid passed through a first section of the first core portion and a flow direction of the refrigerant passed through a second section of the first core portion are changed with respect to a direction that the tubes are layered, before flowing in the second core portion. Thus, the internal fluid passed through the first section of the first core portion flows into a second section of the second core portion and the internal fluid passed through the second section of the first core portion flows into a first section of the second core portion.

Abstract: A heat exchange fin spacer. The fin may be sandwiched between two plates in a brazed-plate heat exchanger. The fin is based upon a corrugated product having wave legs which, when mounted, define flow channels for a gas to be condensed. The fin has at least one condensed liquid drainage channel on the wave legs and deviation elements that drain the liquid towards at least one lateral edge of the wave legs. The deviation elements are provided with at least one leading edge and/or at least one inclined trailing edge. The invention is suitable for use in the main heat exchanger of an air separation unit.

Abstract: The invention relates to a strip of corrugations (2) for brazed plate and fin heat exchangers of the type with partial offset, comprising a series of zones for brazing on a first separation sheet (1), a series of zones for brazing on a second separation sheet (1) adjacent to the first separation sheet (1) and a series of wings (13, 14), said wings forming the fins, of which at least one of the wings (14) of a corrugation is inclined without being perpendicular to the separation sheets (1) and of which at least one of the wings (13) has at least one section perpendicular to the separation sheets (1) and a brazed plate or fin exchanger comprising said corrugations.

Abstract: The invention relates to a charge air intercooler (1), in particular for a private car, in which charge air can be cooled by a coolant flowing through flow channels, whereby the flow channels for the coolant are formed from flat tubes (6).

Abstract: A heat exchanger with at least one louver arrangement in the region between associated tubes for the heat transfer from one medium to another medium. The louver arrangement is provided with an inflow part and an outflow part corresponding to the inflow part. Both flow parts each have one outside louver, at least one intermediate louver and one inside louver, whereby the inside louvers are connected to each other and the louvers of one flow part are arranged inclined relative to the louvers of the other flow part and provided with louver geometry elements—length L, width B, angle of inclination ?—, whereby between adjacent inclined louvers each there are passage slots for the flowing medium. The louver arrangement is provided at least in one of both flow parts with at least one at least single-curved intermediate louver and/or at least one multiple-curved outside louver and/or inside as geometry elements.

Abstract: The present invention relates to a plate for a heat exchanger, which has beads of refrigerant distributing sections formed asymmetrically and streamlined beads arranged in the same number on flow channels in the form of a zigzag so that refrigerant flowing inside a tank is distributed and introduced to tubes uniformly, thereby increasing a heat radiation amount and enhancing a heat exchange efficiency by forming uniform flow distribution and reducing a pressure drop of refrigerant, and miniaturizing the heat exchanger into a compact size.

Abstract: In a corrugated fin which is formed and bent into a wave-form, a plurality of both-side-cut-louvers 8, which are laminated on each other and formed into a group, and one-side-cut-louvers 7, which are arranged at end portions of the group of both-side-cut-louvers 8, are formed being raised, and a cross-section in the louver laminating direction of at least one of the one-side-cut-louvers 7 is formed into a substantial V-shape. An inclined face 70 of the one-side-cut-louver 7 adjoining the both-side-cut-louver 8 is made to cross a centerline in the fin thickness direction and a length of the inclined face 70 is made to be the same as that of the inclined face of the adjoining both-side-cut-louver 8.

Abstract: The invention relates to a heat exchanger and a rib (1), in particular a corrugated rib (1), especially for a flat tube heat exchanger, in particular a coolant or charge-air cooler for motor vehicles. The corrugated rib (1) is arranged between flat tubes (3) of the heat exchanger, is connected thereto in a material fit, comprises gills (6, 8), can be exposed to a flow of air and comprises moulded reinforement means.

Abstract: A louver fin (11) has a corrugated shape by alternately forming bent portions (15) and flat portions (17) in a strip thin sheet (13). In the louver fin (11), a plurality of louvers (19, 21) cut and bent out of the flat portions (17) along the longitudinal direction Y of the strip thin sheet (13) are arranged parallel to each other along the width direction X of the strip thin sheet (13). In the louver fin (11) the louvers (18, 19) are cut and bent at an approximately same angle with respect to the longitudinal direction Y of the strip thin sheet (13).

Abstract: A method of manufacturing serpentine fins for assembly between tubes in a heat exchanger core. The method includes providing a flat metal strip and forming in the strip, multiple rows of split louvers. Each row of split louvers has louvers formed in pairs of adjacent, spaced louver banks extending across the width of the strip. Each row includes ribs formed in the strip parallel to the louver openings and extending across the pair of louver banks. The metal strip has unformed portions extending across the strip width between rows of split louvers for forming folds across the width of the strip. After forming the rows of split louvers, pressure is applied to the strip to cause the flat strip to buckle along the unformed portions forming folds in the strip resulting in the serpentine fin. Preferably, the strip has ribs formed both in the center portion and along the edges.

Abstract: Heat exchanger assemblies of increased strength are provided having louvered fins that achieve both high thermal efficiency and high strength simultaneously. By providing for a three-piece louvered fin, tube-fin heat exchangers having at least one three-piece single louver block, and, in particular, a streamlined inclined three-piece single louver block, exhibit fins with superior characteristics and overall strength for heat exchanger assembly of louvered fin design, with reduced areas or zones of boundary layer air.

Abstract: A heat dissipation fin for heat exchangers disposed between tubes for heat exchangers includes pluralities of louvers arranged in several layers. The louvers of the respective layers are inclined toward the middle of the heat dissipation fin in a straight line in a symmetrical fashion, and the distance between the louvers is gradually increased from the outermost end of a first half part of the heat dissipation fin to the middle of the heat dissipation fin, whereby the air resistance is decreased and the heat dissipation efficiency is improved.

Abstract: The invention relates to a heat exchanger of a plate-type construction having first flow channels for a first medium, each formed by a pair of plates, and having corrugated ribs, around which a second medium flows, arranged between neighboring plate pairs. In order to provide an improved heat exchanger which allows a more compact construction of the plant when used in a heating or air conditioning unit of a motor vehicle, it is proposed that the corrugated ribs and at least one of the neighboring plate pairs form second flow channels for the second medium and the second flow channels have a curved course, so that the second medium undergoes a change of flow direction on flowing through the heat exchanger.

Abstract: A metal plate comprises two flat wall forming portions 89, 90 connected together by a joint portion 88, a plurality of reinforcing wall forming portions 83, 84 upwardly projecting from each of the wall forming portions 89, 90 integrally therewith, and a side wall forming portion 81, 82 formed at each of opposite side edges of the plate and upwardly projecting therefrom integrally therewith. A projection 85 is formed on the upper end of the reinforcing wall forming portion 83 on the flat wall portion 89, and a recess 86 for the projection 85 to fit in is formed in the upper end of the wall forming portion 84 to be butted against the portion 83 and provided on the other flat wall portion 90. The metal plate satisfies the relationships of: A>a, A/a?1.5, B/b?1.5, C/c?1.5, and D/d/?1.

Abstract: A plate and fin type heat exchanger has a heat exchanger core made from a plurality of stacked, alternating first and second heat exchange plates of a generally inverted, U-shaped cross-section. Each plate has a top wall, closed peripheral sidewalls and open ends, and the open ends of the first plates are oriented at 90° to the open ends of the second plates. The sidewalls of the plates have end portions, which in adjacent plates, are aligned to form corners of the heat exchanger core. Opposed U-shaped manifold bodies are provided having open ends and lateral walls joined in a fluid tight manner to the aligned plate sidewall end portions. End plates close off the open ends of the U-shaped bodies to form manifolds. The corners formed by the aligned plate sidewall end portions allow for an improved connection between the heat exchanger core and the U-shaped manifold bodies.

Abstract: A heat exchanger has tubes stacked in a direction and constructed of plate members. Each tube includes a main part for defining a passage of an internal fluid therein and a joined part that is provided by joining portions of the plate member to have surface contact. The joined part projects from an upstream end of the main part with respect to a flow of an external fluid. The joined part includes an inclined portion that is bent at a predetermined angle relative to a reference plane that is perpendicular to the direction in which the tubes are stacked.

Abstract: Disclosed is a louver fin type heat exchanger positioned upright at a certain angle with respect to the ground, wherein lower end portions of louver fins close to the ground are bent toward lower end portions of adjacent louver fins, such that the air passage at the lower end portion close to the ground has cross-section areas that are wide at certain portions and are narrow at other portions thereof. Accordingly, moisture congregates only at a portion where the cross-section of the air passage is great, so that the external air smoothly passes into or out the heat exchanger through the air passage where the moisture congregation does not occur, minimizing the pressure drop, and efficiency in heat exchange of the heat exchanger can be thusly improved.

Abstract: A condenser coil for a refrigerated beverage and food service merchandiser includes a plurality of parallel fins or V-shaped fins between adjacent tubes. In order to reduce the likelihood of fouling by the bridging of fibers therebetween, the spacing of the fins is maintained at a distance of 0.4 to 0.8 inches apart. In one embodiment, the coil includes a plurality of flat multichannel tubes, with no fins therebetween, and the spacing between the multichannel tubes is maintained in the range of 0.4 to 0.8 inches. In one embodiment, the coil includes at least one serpentine shaped, multichannel tubes, with no fins therebetween, and the spacing between flat, parallel segments of the multichannel tubes is maintained in the range of 0.4 to 0.8 inches.

Abstract: A heat exchanger has tubes defining refrigerant passages therein and fins disposed between the tubes. The tubes have tube main walls opposed to each other. The fins are joined to the tube main walls. The tube main walls have projections that project inside of the tubes and define recesses on outer sides of the tubes. Each of the tubes has an outer dimension, in a direction perpendicular to the tube main walls, in a range between equal to or greater than 0.8 mm and equal to or less than 1.9 mm.

Abstract: The invention provides a heat exchanger having a plurality of plates stacked in alternating mirrored relation with one another. Each of the plurality of plates has a plate length extending along a plate longitudinal axis between first and second ends. Each of the plurality of plates also has a plate width extending transverse to the plate longitudinal axis. The plurality of plates cooperate to define a fluid receiving cavity extending along a receiving axis substantially perpendicular to the plate longitudinal axis. The plurality of plates also cooperate to define a fluid exiting cavity extending along an exiting axis substantially perpendicular to the plate longitudinal axis and spaced from the receiving axis. A plurality of plate cavities are defined between alternating pairs of adjacent plates and extend along the plate length. The plurality of plate cavities fluidly communicate with both of the receiving and exiting cavities.

Abstract: A heat exchanger in a cabinet space for use in a stationary air conditioning system, wherein the heat exchanger has a pair of substantially horizontal manifold tanks engaged to a plurality of substantially vertically oriented flow tubes bent into substantially an L shape having a bend angle sufficiently steep that condensate runs along the surface under the force of gravity. Furthermore, the heat exchanger has improved fins and is angled in the horizontal direction for less inhibited drainage of condensate.

Abstract: A heat exchanger includes flat tubes and corrugated fins. The corrugated fin includes peak portions contacting the adjacent tubes, and flat portions for making air to pass therebetween in an air flow direction. The flat portion has a first area including pairs of end louvers provided in end portions of the flat portion in a width direction between the adjacent tubes, and a flat part provided between the end louvers in the width direction. The pairs of the end louvers are arranged in the flat portion in the air flow direction. The first area is provided at least one of an upstream end portion and a downstream end portion of the flat portion in the air flow direction.

Abstract: A tube 2 is composed of a first plate 6 and a second plate 7 which are opposed and engaged with each other. In a region C on both end sides of the tube 2, the first plate 6 is formed into a shape in which an edge portion 6a of the first plate is laid along a bent portion 7b of the second plate so that an outer wall face of the tube will be composed of continuous face. In a region D except for both end sides of the tube 2, the first plate 6 is formed into a shape in which the edge portion 6a of the first plate 6 is laid between the edge portion 7a of the second plate 7 and the bent portion 7b.

Abstract: A plurality of angle portions 2c of the fins on an upstream side and those on a downstream side of an air flow are provided so as to be substantially symmetrical with each other. Due to this, bending forces are continuously exerted on a thin plate-like fin material in a direction where the bending deformation of the fin material is cancelled, during the fin forming process. Accordingly, when the angle portions 2c are formed it can be prevented in advance that the fin material 11 is deformed in a state where the repeated deformations of the fin material 11 are accumulated in the same direction.

Abstract: The rib and the block are applicable in heating appliances construction. They have increased operational safety and heat transfer velocity. The rib comprises an upper (1.1) and lower hole (1.2), a joining profile (2), a first (3) and second (4) internal foldings, a third intermediate (5) and a fourth external (6) folding, which ends in a fifth reversed folding (7). The fourth external folding (6) and the fifth reverse folding (7) extend from below to the end of their respective chamfers (8), and at the upper side of the rib, together with the second (4) and the third (5) folding, they connect its two vertical walls via two chamfers (9). Centrally in relation to the upper hole (1.1), on its both sides, and above, on the surface of the second internal folding 4 and the third intermediate folding (5), there are spherical concavities (10), and on both sides of the lower hole (1.2) there are similar spherical concavities (11).

Abstract: The invention relates to a heat exchanger (1), especially for motor vehicles, which comprises flat pipes (2) through whose interior a first fluid (FL1) flows and that can be impinged upon externally by a second fluid (FL2). The flat pipes (2) are substantially disposed at an angle to the direction of flow (S2) of the second fluid (FL2) and parallel relative one another and are spaced apart so as to configure flow paths for the second fluid (FL2) that extend through the heat exchanger. Cooling ribs (3) are disposed in the flow paths and extend between respective adjacent flat pipes (2). A plurality of wavy ribs (3) are provided as the cooling ribs. These wavy ribs are disposed one behind the other in the direction of flow (S2) of the second fluid (FL2) and are off-set from one another in the direction of flow (S1) of the first fluid (FL1).

Abstract: A tube inside passage height (Tr) is set within a range of 0.35–0.8 mm. Thereby, sum of radiation performance reduction due to pressure loss inside tube and radiation performance reduction due to air flow resistance is reduced, thereby attaining high radiation performance. Especially, when the tube inside passage height (Tr) is set within a range of 0.5–0.7 mm, the radiation performance is further improved.

Abstract: A corrugated fin comprises a first part which is interposed between paired first tubes, a second part which is interposed between paired second tubes and a third part through which the first and second parts are integrally connected. The third part of the corrugated fin is formed with louvers which extend in a direction perpendicular to upper and lower folded edge portions of the first and second parts. Each of the louvers is of a half-louver type including an elongate flat portion which is bent up or down along a lower edge thereof from a major portion of the third part and two generally triangular supporting portions which support longitudinal ends of the elongate flat portion from the major portion.

Abstract: A plate type heat exchanger employing flat tubes, which can be manufactured easily and which have a high heat exchange performance includes a thin strip-shaped metal plate cut in the width direction and having remaining small connected portions and many cut portions disposed at fixed intervals in the longitudinal direction slits are formed in both sides of the cut potions having the same center. The strip-shaped metal plate is bent at the connected portions in a zigzag manner to form an aggregation of fin elements, and the flat tubes are engaged with the front and rear sides of the aggregation of the fin elements.

Abstract: A heat exchanger which reduces a flow loss of air and increases a heat exchange performance by preventing condensate water from staying at surfaces of fins. To this end, the heat exchanger includes: a plurality of tubes arranged with a predetermined interval so as to pass a fluid for the heat exchange; and fins mounted among the tubes for expanding a contact area with air, wherein the fins are tilted with a predetermined angle so as to prevent condensate water from staying at the surfaces of the fins.

Abstract: A heat exchanger comprising a plurality of refrigerant pipes bent many times for passing a refrigerant for heat exchange; and cooling fins arranged at an outer circumference surface of the refrigerant pipes for expanding a contact area of air which passes through the refrigerant pipes, wherein a direction that the refrigerant pipes are bent is a major axis and a perpendicular direction to the major axis is a minor axis. In the heat exchanger, a bending portion of the refrigerant pipe is prevented from being distorted thus to have a smooth refrigerant flow and enhance a heat exchange performance.

Abstract: A layered heat exchanger, for example for use for motor vehicle coolers. To provide a turn portion in the heat exchanger for changing flow direction of a fluid flowing zigzag through a fluid circuit, a metal plate is provided at the upper or lower ends of a partition ridge with a fluid flow direction changing passage forming caved portion having a bottom wall of circular-arc cross section. Front and rear upper or lower tank portions are held in communication with each other through a fluid flow direction changing passage of approximately circular cross section and formed by the caved portions opposed to each other. The turn portion is diminished in stress concentrated thereon due to fluid internal pressure and given an increased resistance to pressure to effectively prevent tank side walls from breaking, consequently making it possible to decrease the metal plates thicknesses, to achieve a cost reduction by the decreased thickness and to assure an improved heat exchange efficiency.

Abstract: A compound type heat exchanger has a core part including a plurality of heat exchanging pipes and fins juxtaposed and alternately stacked into a lamination. Header pipes are connected to both ends of the pipes. Partition walls are provided in the header pipes. At a boundary of the partition wall and a spatial part, the core part is divided into two parts providing an oil cooler unit on one hand and a condenser unit on the other hand. The spatial part is defined in the core part, corresponding to the intermediate portion between the partition walls in the header pipe. Owing to the provision of the spatial part in the core part, heat conduction from the oil cooler unit to the condenser unit can be suppressed.

Abstract: A heat exchanger having fins disposed adjacent to each other with tubes passing through the fins to interconnect the fins. Louvers are formed in each of the fins with each louver extending at an angle with respect to the fins. An upstream portion of the interconnected fins define an incoming airflow side of the heat exchanger and a downstream portion of the interconnected fins define an outgoing airflow side of the heat exchanger. The louvers define a first bank of louvers formed in each of the upstream portions of the fins facing the incoming airflow side of the heat exchanger. The louvers also define a second bank of louvers formed in each of the downstream portions of the fins facing the incoming airflow side of the heat exchanger. Hence, all of the louvers on the fins are facing the same direction for minimizing the air pressure drop, while increasing a heat transfer between the fins, tubes, and the air flow.

Abstract: A fluid cooler assembly comprises a vertically stacked first type and second different type of tubular panel subassembly construction integrated with a third subassembly of external corrugated fin construction positioned above and below each tubular panel subassembly. The first type tubular panel subassembly has an internal central flow region configured with a bilateral linear flow channeled subregion adapted for controlling the hydraulic behavior of the internal tubular coolant fluid flow. The second tubular panel subassembly has an internal tubular central flow channel region configured with a bilateral cross-flow channel region adapted for optimizing heat transfer.

Abstract: A condenser coil for a refrigerated beverage and food service merchandiser includes a plurality of parallel fins between adjacent tubes. In order to reduce the likelihood of fouling by the bridging of fibers therebetween, the spacing of the fins is maintained at a distance of 0.4 to 0.8 inches apart. In one embodiment, the tubes comprise microchannel tubes, with no fins therebetween, and the spacing between the microchannel tubes is maintained in the range of 0.75 inches to optimize the heat transfer performance while minimizing the occurrence of fouling. A supporting structure is provided between microchannel tubes when no fins are included. Also, plural rows of microchannel tubes are provided with separate inlet headings and with the rows being staggered in transverse relationship to enhance the heat transfer characteristic while minimizing the likelihood of fouling.

Abstract: In a liquid loop cooling device, a heat exchanger includes a tube arranged in a multiple-pass configuration including a plurality of substantially parallel tube segments. The heat exchanger further includes a plurality of fins coupled to the tube segments. The fins for adjacent tube segments are separated by a gap.

Abstract: According to one example of the invention, there is provided a multipass plate pair for conducting a fluid in a heat exchanger. The plate pair includes first and second plates, each plate having at least two longitudinal columns of externally protruding obliquely angled ribs formed therein and separated by a longitudinal flat section extending from substantially a first end of the plate to a terminus spaced apart from a second end of the plate. Each plate includes, between the terminus and the second end, a turn portion joining the two longitudinal columns. The first and second plates are joined together with the longitudinal flat sections abutting each other and the columns of angled ribs cooperating to form undulating first and second internal flow channels there-through separated by the abutting longitudinal flat sections. The first and second internal flow channels each have an upstream area and a downstream area relative to a flow direction of an external fluid flowing over the plate pair.

Abstract: A wave-shaped portion 5b, the profile of which is formed into a wave-shape, is provided on the core plate 5, and tubes are brazed to the core plate 5 under the condition that the tubes are inserted into holes 5c formed in bent portions 5a. Due to the above structure, even when a pitch between the tubes is reduced, it is possible to ensure a sufficiently high mechanical strength of the core plate 5. Accordingly, the occurrence of a big difference in the mechanical strength between the core plate 5 and the tubes can be suppressed. Therefore, stress concentration at a joint portion of the core plate 5 and the tubes can be prevented. As a result, the mechanical strength of a radiator and the reliability (durability) of the joint portion of the core plate 5 and the tubes can be enhanced.

Abstract: A fin for a heat exchanger coil assembly and a method of manufacturing the fin is provided. The fin includes a heat transfer enhancement pattern which appears sinusoidal in shape. The base wavy pattern of the enhancement pattern includes two wavelengths within each tube row and includes seven discrete segments. Six of the seven segments are circular arc segments. The seventh segment comprises two linear segments which form a condensate channel. The segments are arranged in a particular order at specific distances offset (above and below) from a leading edge nominal air streamline (LENAS) by a fraction of a nominal fin pitch Pf. The LENAS is related to the “normal” base wavy pattern used in other fins.

Abstract: This duplex-type heat exchanger is adapted to a vapor compression type refrigeration cycle in which a condensed refrigerant is decompressed and then evaporated. This duplex-type heat exchanger is integrally equipped with a subcooler S in which the condensed refrigerant exchanges heat with the ambient air A to be subcooled and an evaporator E in which the decompressed refrigerant exchanges heat with the ambient air A to be evaporated. Heat exchange is performed between the refrigerant passing through the subcooler S and the refrigerant passing through the evaporator E, to thereby cool the refrigerant in the subcooler S and heat the refrigerant in the evaporator E. Accordingly, according to this heat exchanger, a high refrigeration effect can be obtained while avoiding the pressure rise of the refrigerant.

Abstract: A virtual quadrangle having vertexes respectively configured by: inner ends which are located respectively at a corner of inner cut end faces of the louvers formed in flat portions that are opposed to each other across the bent portion; and outer ends which are located respectively at a corner of outer cut end faces of the louvers, is assumed. A distortion adjusting portion is disposed in the bent portion of the louver fin. The distortion adjusting portion equalizes distortion generated in the direction of an inner diagonal line connecting the inner ends of the virtual quadrangle, with that generated in the direction of an outer diagonal line connecting the outer ends of the virtual quadrangle. Thereby, the louver fin can be prevented from being curved in the longitudinal direction.

Abstract: Heat exchange inefficiencies found in round tube plate fin heat exchangers are eliminated in an aluminum heat exchanger that includes first and second headers (20), (22) and at least one flattened tube (24), (70) extending between the headers (20), (22). A plurality of generally parallel tube runs are defined and each has opposite edges. A plurality of plate fins (26), (50) are arranged in a stack and each has a plurality of open ended slots (34), one for each run of the tubes (24), (70). Each of the tube runs (24), (70) is nested within corresponding slots (26) and the fins (26), (50) with one of the edges (40) of the tube runs extending outwardly of the corresponding fin (34). The assembly is brazed together.

Abstract: A corrugated fin comprises a first part which is interposed between paired first tubes, a second part which is interposed between paired second tubes and a third part through which the first and second parts are integrally connected. The third part of the corrugated fin is formed with louvers which extend in a direction perpendicular to upper and lower folded edge portions of the first and second parts. Each of the louvers is of a half-louver type including an elongate flat portion which is bent up or down along a lower edge thereof from a major portion of the third part and two generally triangular supporting portions which support longitudinal ends of the elongate flat portion from the major portion.

Abstract: The invention relates to a plate-type heat exchanger, in which at least one first flow passage (16) for a first medium is provided between two plates (12 and 14), which form a plate pair (13). A plurality of second flow passages (18), which are connected in parallel, for a second medium are provided between two plate pairs (13). To provide a novel, improved heat exchanger, which is easier to produce, it is proposed that the second, parallel-connected flow passages (18) are formed in each case by one plate (14, 12) from adjacent plate pairs (13).

Abstract: A plate-type heat exchanger containing a number of stacked dividing plates of roughly uniform thickness (e), at least one passage, and at least one fin. The minimum thickness (e?) of the fin is 0.8 times greater than the thickness (e) of each dividing plate(s).

Abstract: The invention concerns a corrugated heat exchanger element (1) that can be produced from a metal strip and has a corrugation height (h) that lies between the crests (2) of the corrugations, in which the crests (2) form a first and second plane, consisting of several crests (2), at least some of the crests (2) of each plane being connected to the heat exchanger walls (3), and in which each crest (2) of the first plane is connected to the following crest (2) of the second plane by means of flanks (4), and a flow channel (20) is formed between adjacent flanks (4); structures (5), whose direction of alignment (15) in one flank (4) intersects the direction of alignment (15) in the following flank (4), are situated in the flanks (4).

Abstract: A heat exchanger includes: a receiving tube into which a fluid is introduced; a discharge tube for discharging a heat-exchanged fluid outwardly; a plurality of fins disposed between the receiving tube and the discharge tube, being bent at regular intervals so that air can pass at an outer circumferential surface thereof, and having a guide unit for guiding condensate water condensed at the surface thereof in one direction; and a tube disposed between the fins for heat-exchanging between a fluid passing therethrough and air passing the outer circumferential surface of the fin, and having a condensate water discharge path for discharging downwardly the condensate water guided by the guide unit. A condensate water remaining phenomenon between the fins can be reduced, and thus, the heat exchanging performance is improved.