Abstract: A finned tube heat exchanger includes a plurality heat-transfer fins and a plurality of heat-transfer tubes. The heat-transfer fins are disposed along an airflow direction. The plurality of heat-transfer tubes are inserted into the heat-transfer fins and arranged in a direction substantially orthogonal to the airflow direction. Each of the heat transfer fins includes a plurality of sets of cut-and-raised parts with each set being straightly aligned from the upstream side toward the downstream side. At least one set of cut-and-raised parts is connected by a straight line sloped relative to the airflow direction. Each of the heat transfer fins includes a plurality of concavities with each concavity formed on a periphery of one of the heat-transfer tubes at least partially below a horizontal plane that passes through a center axis of the heat-transfer tubes and lies on an upper surface of the heat transfer fin having the concavity formed therein.

Abstract: Each heat exchange tube of an evaporator is composed of two press-worked rectangular metal plates joined together in a stacked condition. The metal plates of the heat exchange tube are swelled outward whereby at least one refrigerant flow space extending in the vertical direction and having opened upper and lower ends is provided in the heat exchange tube. Insertion portions to be inserted into header sections of header tanks of the evaporator via tube insertion holes are provided on upper and lower end portions of each heat exchange tube at positions corresponding to the refrigerant flow space. A concave portion is formed in each of the insertion portions, excluding opposite ends thereof with respect to the front-rear direction, of the upper and lower end portions of each heat exchange tube, the concave portion being concaved inward with respect to a longitudinal direction of the heat exchange tube.

Abstract: Each fin 30 is designed to have continuous lines of wave crests 34 and continuous lines of wave troughs 36 arranged at a preset angle in a specific angle range of 10 degrees to 60 degrees relative to the main stream of the air flow and symmetrically folded back about folding lines of a preset folding interval W along the main stream of the air flow. A ratio (a/p) of an amplitude ‘a’ of a waveform including one wave crest 34 and one adjacent wave trough 36 to a fin pitch ‘p’ satisfies a relation of 1.3×Re?0.5<a/p<0.2. A ratio (W/z) of the folding interval W to a wavelength ‘z’ of the waveform satisfies a relation of 0.25<W/z<2.0. A ratio (r/z) of a radius of curvature ‘r’ at a top of the wave crest 34 or at a bottom of the wave trough 36 to the wavelength ‘z’ of the waveform satisfies a relation of 0.25<r/z.

Abstract: A method for forming heat exchanger plates (10) comprises formation of a fluid flow channel (28) along the edges (22) of a sheet metal strip or blank, and formation of a pair of raised end bosses. The raised end bosses (32) are elongated in the longitudinal dimension and are formed within the final width dimension of the plate so as to avoid the need for trimming of excess material along the edges of the plate. The method generates less scrap than prior art processes using progressive stamping, and also permits variation of the plate lengths.

Abstract: A condenser having improved condensation performance is provided. The condenser includes a plurality of cooling pipes, being disposed in a chassis to which the steam is introduced, through the interior of which cooling water used for heat exchange with steam flows; an inner channel that extends in a top-bottom direction and that is surrounded by the plurality of cooling pipes; a plurality of pipe-supporting plates disposed at a distance from one another in a direction in which the plurality of cooling pipes extend to support the plurality of cooling pipes; and a water receiving portion disposed between the plurality of pipe-supporting plates and being inclined downward from one pipe-supporting plate to the other pipe-supporting plate.

Abstract: A method of constructing an inner thermal lining or jacket of a jacketed gasifier having an outer shell with an opening allowing access to an interior of the gasifier, includes inserting jacket wall segments (40) into the gasifier interior through the opening, the jacket wall segments (40) each comprising an elongate jacket plate (42) with an annulus face (44) and a plurality of transversely extending longitudinally spaced stiffener formations (46) standing proud of the annulus face (44). The jacket wall segments (40) are arranged side by side leaving an aperture or space between adjacent jacket plates. The stiffener formations (46) of adjacent spaced jacket wall segments are welded together through the aperture or space between said adjacent spaced jacket wall segments, and the apertures or spaces are closed with window plates.

Abstract: An evaporator (e.g., a small-sized high-efficiency evaporator) and a fuel reformer having the same. The evaporator has multi-stage structure (e.g., a four-stage disk structure), in which the respective disks are filled with fin structures. The first two disks through which exhaust gas passes and the second two disks through which water passes are stacked alternately with each other. Also, the first two disks are coupled with each other by a first pipe penetrating through one of the second two disks, and the second two disks are coupled with each other by a second pipe penetrating through one of the first two disks.

Abstract: A heat exchanger comprising a tube, a fin, and a header pipe, wherein the tube contains, in mass %, 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance of Al and unavoidable impurities, and is coated with a coating of brazing composition containing 1.0 to 5.0 g/m2 of Si powder, 4.0 to 10.0 g/m2 of KZnF3, and 0.5 to 3.0 g/m2 of binder; the fin contains, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, one or two or more selected from 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance of Al and unavoidable impurities; and the header pipe comprises a core material, outer sacrificial corrosion protection material, and an inner brazing material.

Abstract: Heat is exchanged between exhaust gas passing through a plurality of tubes and cooling water passing through a plurality of passages defined outside of the plurality of tubes layered with each other. A heat exchanger includes a temperature decreasing portion arranged in a predetermined area on an outer surface of the tube adjacent to an inlet side of exhaust gas. The temperature decreasing portion is configured to decrease a temperature of a thermal boundary layer of the outer surface of the tube relative to cooling water by increasing a heat transmitting ratio between the outer surface of the tube and cooling water.

Abstract: A method of assembling a gas turbine engine is provided. The method includes providing at least one heat exchanger assembly including a heat exchanger and a mixer extending downstream from the heat exchanger. The mixer includes a plurality of windows formed therein. The method also includes coupling the at least one heat exchanger assembly within a bypass duct of the engine such that the at least one heat exchanger assembly is coupled to at least one of an outer engine casing and an inner engine casing of the turbine engine.

Abstract: A heat exchanger fin capable of increasing convective heat transfer by reducing internal conduction along an undesirable direction within the heat exchanger fin itself is disclosed. More specifically, the current invention reduces conduction within the heat exchanger fin along an undesirable direction along the direction of fluid flow because such conduction decreases the performance of the heat exchanger fin. A heat exchanger fin in accordance with the present invention utilizes a plurality of notches within the heat exchanger fin that is perpendicular to the direction of fluid flow to increase the resistance of conduction within the heat exchanger fin itself. By increasing the resistance of conduction in an undesired direction, the heat exchanger fin is capable of more uniform temperature to along the entire surface area to facilitate increase convective heat transfer in the desired direction.

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

Abstract: An improved method for manufacturing tube and fin heat exchangers that, according to a preferred embodiment, includes a process for increasing the stiffness and rigidity of heat exchanger fins. Stiffer fins have a greater tendency to maintain proper alignment within a stack of fins, which aids in lacing long stacks of fins with small (e.g., 5 mm) diameter tubing. Preferably, fin stiffness is increased by forming a plurality of longitudinal ribs within the fin during the fin stamping process. More preferably still, two ribs for each longitudinal row of collared holes are provided. The preferred embodiment also includes a slotted heat exchanger fin that is dimensioned and arranged for optimized thermodynamic performance when used with small diameter tubing, thus reducing the space required for a given heat exchanger system.

Abstract: A heat exchanger including plate fins stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in. The heat exchanger exchanges heat between first and second fluids flowing, respectively, inside and outside the heat exchanger tubes. Each of the fins includes a substantially planar main body and cut-raised portions extending from the main body and disposed at an upstream side of flow of the second fluid. Each of the cut-raised portions corresponds to a respective heat exchanger tube and includes first and second opposed side ends connected to the main body of the fin. The first side end is nearer to the corresponding heat exchanger tube than is the second side end, the first side end is longer than the second side end, and the first side end is disposed at a downstream side of the flow of the second fluid, facing the corresponding heat exchanger tube.

Abstract: The present invention relates to a heat exchanger for a vehicle, and more particularly, to a highly efficient thin heat exchanger for reducing the weight of a vehicle body and enhancing heat radiation performance. In the present invention, there is provided an optimal design range for maximizing heat radiation performance of the radiator using a concept of thermal resistance.

Abstract: The invention relates to a soldered heat exchanger network comprising folded flat multichamber tubes and wave-like ribs that are provided with fins. The multichamber tubes encompass at least two chambers, each of which is formed by folded webs that are soldered in the interior of the multichamber tube. According to the invention, the wave-like ribs are provided with fin-free fields in the area of the web or webs.

Abstract: A heat exchanger has tubes arranged in parallel at regular distances so they extend in the same direction as the ventilation direction of heat exchange medium flowing through the tube. The heat exchange medium is introduced and distributed to the plural tubes via an inlet tank. A fin interposed between the tubes increases the contact surface area of air passing between the tubes. The heat exchange medium flowing through the tubes is collected and then discharged by an outlet tank. The dimensions of the cross-sectional area Stube of the tube and the sectional area Stank of the inlet tank or the outlet tank satisfy the following formula: 0.04 < sectional ? ? area ? ? of ? ? tube ? ? ( S tube ) sectional ? ? area ? ? of ? ? tank ? ? ( S tank ) < 0.

Abstract: A heat dissipation device includes a base, a fin group located on the base, a first heat pipe and a second heat pipe. The fin group includes a first fin group, a second fin group arranged on the first fin group and a third fin group arranged on the second fin group. The first heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion sandwiched between the first fin group and the second fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion. The second heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion located between the second fin group and the third fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion thereof.

Abstract: A tube for a heat exchanger is disclosed, the tube including a plurality of protuberances formed on an inner surface of the tube. The protuberances are arranged in a pattern that maintains a substantially constant cross sectional hydraulic area along a length of the tube.

Abstract: A heat exchanger including plate fins and, the tubes fins being stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in a fin-stacking direction. The heat exchanger exchanges heat between fluids flowing, respectively, inside and outside the heat exchanger tubes, through the heat exchanger tubes and the fins. Each of the fins includes cut-raised portions with a bridge shape having leg and beam segments. The cut-raised portions associated with each of the heat exchanger tubes are located substantially only in a region of the fin satisfying Ws=(1??)Dp+?D ?>0.5, where Ws is spread width of the cut-raised portions in a direction (column direction) extending along an end of the fin on the upstream side of the second fluid, and D is outer diameter of the heat exchanger tube. Dp is alignment pitch of the heat exchanger tubes in the column direction.

Abstract: A fin-tube heat exchanger 1 includes a plurality of fins 3 arrayed spaced apart from and parallel to each other so as to form gaps for allowing a first fluid to flow therethrough, and a plurality of heat transfer tubes 2 penetrating the plurality of fins 3 and for allowing a second fluid to flow therethrough. The plurality of heat transfer tubes 2 includes first heat transfer tubes 2A and second heat transfer tubes 2B arranged in a predetermined row direction that intersects the flow direction of the first fluid. The fins 3 have protrusions 5 each disposed between a first heat transfer tube 2A and a second heat transfer tube 2B, for guiding the first fluid toward the first heat transfer tube 2A side and the second heat transfer tube 2B side. The equivalent diameter of the protrusion 5, as viewed in the axis direction of the heat transfer tubes 2, is equal to or greater than the outer diameter of the heat transfer tubes 2.

Abstract: A condenser for a refrigerator includes an inline arrangement in which a refrigerant tube is arranged such that refrigerant tube parts are arranged in lines in the forward and backward direction, and a staggered arrangement in which the refrigerant tube parts are arranged at the rear side of the inline arrangement in the forward and backward direction to misaligned with each other, such that the difference of air flow between a front side and a rear side thereof is minimized when heat exchange with ambient air in the condenser is performed by blowing operation of a cooling fan installed to a side of the condenser.

Abstract: A heat exchanger assembly for thermally conditioning a stream of air. The assembly includes a first and second manifolds extending in spaced and parallel relationship. A plurality of tubes extend transversly between the manifolds to establish fluid communication therebetween. A plurality of corrugated air fins is disposed between adjacent tubes with the cross-section of each air fin presenting a plurality of legs extending transversly between the flat sides of adjacent tubes. Each leg defines a plurality of front louvers including a leading half louver disposed adjacent the front edge of the leg and a plurality of leading louvers spaced from each other and from the leading half louver. A plurality of smaller trailing louvers are spaced from the leading louvers. A plurality of rear louvers being spaced from each other is disposed between the trailing louvers and the rear edge of each leg.

Abstract: A heat exchanger has a pair of header tanks with a plurality of tubes and a plurality of fins extending between the pair of header tanks. Each fin forms a plurality of corrugations extending in a length direction between the pair of tanks. Each corrugation extends in a width direction and defines a plurality of sections which are offset from each other in the length direction of the fin. Each section is separated from an adjacent section by a slit.

Abstract: Heat exchanger tubes are disclosed herein. An embodiment of a heat exchanger tube includes a tube body having two opposed sides. A plurality of exterior flow passages is defined in the tube body adjacent one of the two opposed sides. A plurality of interior flow passages is defined in the tube body adjacent the plurality of exterior flow passages. The plurality of exterior flow passages has at least one of an average hydraulic diameter or an average width that is i) greater than at least one of an average hydraulic diameter or an average width of the interior flow passages and ii) less than twice the at least one of the average hydraulic diameter or the average width of the interior flow passages.

Abstract: The invention concerns a metal fin for heat exchanger with tubes, comprising means for increasing heat transfers consisting of diverting conformations (10,11) each arranged upstream and downstream of an aperture (3) when considering the direction (F) of air flow, to force the air to pass either side of said aperture, the upstream (10) and downstream (11) diverting conformations of two superimposed apertures (3) belonging to one same column extending along a determined length so that they substantially rejoin at the plane of extension (P) of offset apertures. (Figure to be published: FIG. 2).

Abstract: The invention concerns a metal fin for heat exchanger with tubes, comprising means for increasing heat transfers consisting of diverting conformations (10,11) each arranged upstream and downstream of an aperture (3) when considering the direction (F) of air flow, to force the air to pass either side of said aperture, the upstream (10) and downstream (11) diverting conformations of two superimposed apertures (3) belonging to one same column extending along a determined length so that they substantially rejoin at the plane of extension (P) of offset apertures.

Abstract: A heat exchanger (40) includes first and second headers (44, 46). Multiple flat core tubes (54) are arranged spaced apart from one another and connected between the headers (44, 46). A fin pack (56) has multiple rows (58) of fins (60) and multiple tabular portions (62, 64). Pairs (70, 72) of adjacent multiple rows (58) are interconnected by the tabular portions (62, 64). The tabular portions (62, 64) define channels (78) between each of the rows (58) of fins (60). A method (90) for producing the heat exchanger (40) entails concurrently inserting multiple core tubes (54) into the channels (78), with one row of fins (60) being disposed between each pair of the core tubes (54).

Abstract: A heat dissipation device includes a base for thermally engaging with an electronic device, a base for thermally engaging with the heat generating electronic device, a fin assembly consisting of a plurality of fins arranged on the base, a first heat pipe and a second heat pipe. The first heat pipe comprises two evaporation sections engaged in the base, two interconnecting condensation sections parallel to the evaporation sections and respectively thermally inserted in the central portion of the fin assembly, and two connecting sections interconnecting corresponding condensation sections and the evaporation sections. The second heat pipe comprising two evaporation sections engaged in the base, two interconnecting condensation sections parallel to the evaporation sections and respectively thermally inserted in the upper portion of the fin assembly far away from the base, and two connecting sections interconnecting corresponding condensation sections and evaporation sections of the second heat pipe.

Abstract: The present invention relates to an improved air conditioning filter and cooling/heating coil that can easily be applied to new and existing air handling systems. The slant design of these components allows a more efficient heat transfer and particle entrapment than their conventional counterparts. By residing at an angle in their air handling enclosures, and by virtue of their oblique prismatic construction, more filter media can be used and more heat transfer surface area can be incorporated without offering any substantial additional impediments to the flow of air. At angles of 45 degrees air friction of the coil and filter are reduced by 40 to 55 percent.

Abstract: In a heat exchanger, a tube is adapted to exchange heat between a first fluid flowing therein and a second fluid flowing through outside of the tube, and an inner fin is disposed in the tube to divide a flow passage in the tube into a plurality of flow paths. The inner fin includes a plurality of fin portions with different specifications, and the fin portions are arranged in series with respect to a flow direction of the first fluid. Furthermore, the fin portion with the smallest flowing resistance of the first fluid among the plurality of fin portions is arranged on an upstream side of the flow direction of the first fluid with respect to at least an another fin portion. Accordingly, heat exchange performance in the entire heat exchanger can be effectively improved.

Abstract: A heat exchanger, in which flowing medium flows, includes a first tank, a second tank, a core part and a flow accelerating means. The first tank is provided with an inlet port, the second tank being disposed apart from the first tank. The core part has a plurality of tubes and a plurality of fins. The tubes have both end portions being fluidically connected with the first tank and the second tank, respectively. Each of the fins is arranged between the adjacent tubes. The flow accelerating mean is provided inside the first tank so as to accelerate a flow speed of the flowing medium, which enters an inner space of the first tank through the inlet port, in the first tank in a longitudinal direction of the first tank.

Abstract: A heat exchanger includes a discharge part formed by an opening part of a partition wall to facilitate discharge of oil, air and foreign substances from the interior of the heat exchanger.

Abstract: A heat exchanger including a plurality of first refrigerant tubes, and a plurality of second refrigerant tubes separated from the plurality of first refrigerant tubes in an air flow direction. Further, a diameter of a respective refrigerant tube of the plurality of first refrigerant tubes is smaller than a diameter of a respective refrigerant tube of the plurality of second refrigerant tubes.

Abstract: There are provided an aluminum alloy plate having high strength and excellent corrosion resistance even though the plate is made thinner, and a heat exchanger formed thereof. In an aluminum alloy plate having a core material and a surface material cladded on at least one side of the core material, the surface material includes 0.030-0.30% by mass of Fe, 0.40-1.9% by mass of Mn, 0.40-1.4% by mass of Si, and 2.0-5.5% by mass of Zn, the rest comprises Al and inevitably included impurities, and an area ratio of an intermetallic compound containing Al and Mn to a whole surface of the surface material is 1% or less.

Abstract: Optimized designs of heat exchangers, and, in particular, heat exchangers and assemblies comprising multi-exchangers or combo coolers comprising different heat exchanger parts or elements, and fins or separators of different types and/or characteristics on the different tube parts of the heat exchanger results, are disclosed. The two part heat exchanger is capable of being traversed by different fluids, and fins differ in characteristics, such as height and pitch, to increase overall heat exchanger efficiency.

Abstract: A fin-tube heat exchanger has a plurality of fins (3) arranged parallel to and spaced from each other at a predetermined gap, and a plurality of heat transfer tubes (2) penetrating the fins (3). In each of the fins (3), a first cut-and-raised portion (5a), a second cut-and-raised portion (5b), and a third cut-and-raised portion (5c) are formed in that order by cutting and raising a portion of the each of the fins so as to turn it over from an upstream side to a downstream side. The horizontal cross-sectional shape of each of the first cut-and-raised portion (5a), the second cut-and-raised portion (5b), and the third cut-and-raised portion (5c) is formed in a semicircular shape and curved so as to taper toward the upstream side.

Abstract: An internally grooved heat transfer tube for a cross fin tube type heat exchanger of a refrigerating air-conditioning water supply apparatus using a high-pressure refrigerant, wherein an intra-tubular heat transfer rate is improved while maintaining a sufficient strength for pressure resistance. A heat transfer tube formed of copper or copper alloy has internal fins between internal grooves. In the tube, t/D is not smaller than 0.041 and not greater than 0.146, d2/A is not smaller than 0.75 and not greater than 1.5, where D [mm] is an outside diameter of the tube, t [mm] is a groove bottom thickness, d [mm] is a depth of each groove, and A [mm2] is a cross sectional area of each groove. N/Di is not smaller than 8 and not greater than 24 where N is a number of grooves, and Di is a maximum inside diameter corresponding to an inside diameter of the tube.

Abstract: A method of assembling a gas turbine engine includes providing at least one heat exchanger assembly including a heat exchanger and a lobed mixer extending downstream from the heat exchanger, wherein the mixer includes a plurality of lobes that each define a first chute and at least one second chute that extends between each pair of adjacent spaced-apart lobes, and coupling the at least one heat exchanger assembly within a bypass duct of the engine such that the at least one heat exchanger assembly is coupled to at least one of an outer engine casing and an inner engine casing of the turbine engine.

Abstract: The present invention provides a heat exchanger for transferring heat between a first working fluid and a second working fluid. The heat exchanger can include a corrugated fin positionable along a flow path of the first working fluid between adjacent tube walls and being operable to increase heat transfer between the first working fluid and the second working fluid. The fin can include a leg defined between adjacent folds. The heat exchanger can also include a plurality of convolutions extending inwardly from a distal end of the leg and terminating at different distances from the end.

Abstract: A device for cooling exhaust gas from an internal combustion engine comprises a plurality of flow ducts which are connected to an exhaust gas recirculation system of the internal combustion engine, a heat exchanger for a coolant to flow around the flow ducts in order to dissipate the exhaust gas heat, and an insert 7, 7? which is arranged within at least one of the flow ducts. The insert 7, 7? is in thermal contact with the flow duct such that the exhaust gas flows at least partially around the insert. The insert 7, 7? has profiled fins 8, 8?, with profiles 9, 9? which are successive in the flow direction of the exhaust gas being arranged so as to be laterally offset relative to one another.

Abstract: A heat dissipation device includes a base and a fin set arranged on the base. The fin set includes a plurality of fins each having an undulating body and two flanges extending from the body. The body includes a plurality of peak faces, a plurality of trough faces alternating with the peak faces and a plurality of slanted faces each connecting adjacent peak face and trough face. The peak faces of each fin conform to the peak faces of an adjacent fin, while the trough faces of each fin conform to the trough faces of the adjacent fin. Pluralities of undulating passages are defined between two adjacent fins. Each heat pipe has a first section contacting the base and a second section extending through the fin set. A fan is located corresponding to the passages of the fin set for providing forced airflow to the fin set.

Abstract: A high-frequency, low-amplitude corrugated fin for a heat exchanger assembly includes a plate member that extends horizontally and vertically to define a reference plane. The plate member has a plurality of conduit portions, a first and second series of corrugated segments formed in the plate member. The first and second series of corrugated segments undulate generally equidistantly relative to and from the reference plane as viewed in cross-section. The plurality of conduit portions is inter-dispersed throughout the plate member among the first and second series of corrugated segments. Each one of the first series of corrugated segments extends at a first angle relative to horizontal and each one of the second series of corrugated segments extend at a second angle relative to horizontal such that individual adjacent ones of the first and second series of corrugated segments form at least a generally chevron-shaped configuration as viewed in plan view.

Abstract: The current invention includes a tube with a helical fin extending from the tube's outer surface. The fins and tube are monolithic, or formed of one part, with a channel defined between adjacent fins. The fin has a crest with peaks and depressions formed in the crest. The fin peak includes an indent formed in a side surface, and the indent includes a flank and a base surface. The indent flank intersects the fin peak top, and the indent base surface intersects the fin side wall.

Abstract: An aluminum alloy for use in a plate-fin heat exchanger having a heat transfer portion with seawater as a coolant includes an organic phosphonic acid underlying coating disposed on the surface of the aluminum alloy and a fluorocarbon resin coating disposed on the organic phosphonic acid underlying coating, the fluorocarbon resin coating having an average thickness of 1 to 100 ?m after drying. The aluminum alloy has improved durability of coating adhesion and excellent seawater corrosion resistance.

Abstract: A gas water heater device includes a combustion chamber for providing a gas flow, a pipe assembly, and a heat exchanger disposed over the combustion chamber including a plurality of thermal conductors disposed in parallel with each other, each of the plurality of thermal conductors further comprising a base, a plurality of through holes accommodating the pipe assembly therethrough, and a flange for collecting condensed water formed on the base.

Abstract: A heat exchanger 11 for use as a cross flow radiator for an engine cooling system has a heat exchanger matrix 12, header tanks 13, 14 and a side plate 16 arranged at the upper of a pair of opposite side edges 16, 17 of the matrix 12. The matrix 12 has tubes 18 which extend between tanks 13, 14 and cooling fins 19. A restrictor plate 21 arranged on side plate 16 restricts air flow past fin 19A. Restrictor plate 21 may have cut out gaps or castellations 22. This reduces heat transfer through the fins above the uppermost tube 18A allowing for a more even temperature distribution, which reduces stress from thermal expansion.

Abstract: A condensing type dryer uses a heat exchanger in which condensed water can be smoothly discharged through a water-discharging slot formed in a rear end portion of a rear cover of the heat exchanger. The water-discharging slot prevents an air flowing resistance which can be caused by condensed water pooling at the rear end portion of the rear cover. Also, leakage-preventing walls enhance the heat exchanging function by ensuring a uniform flow of cold external air through the heat changer. The leakage-preventing walls prevent external air from leaking around the lateral edges of the heat exchanger.

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 involves a flat fin heat exchanger configuration 10 with a plurality of louvers 26 that are raised above the plane of the fin 16 between adjacent tube holes 19, 20 that receive tubes 14. Various alternative patterns of louvers enhance the heat transfer characteristics of the fin, and allow for the use of thinner materials to lower cost without diminishing performance. The exterior fin surface redirects air flow from the leading edge to the trailing edge of the fin. This effect directs the air flow over and in between the interrupted surfaces, thus breaking up air boundary layer around the fin. The louvers of the fin are oriented relative to the air flow in such a manner that each louver in effect creates another leading edge, thus contributing to a higher heat transfer coefficient.