Abstract: A heat dissipation device includes a plurality of fin plates (1) and a pair of heat pipes (30). Each fin plate includes a first plate (10) and a second plate (20). The first plate forms a first fastener (15) at an edge thereof and a pair of cutouts (17) at opposite sides of the fastener. A pair of tabs (152) is formed at opposite sides of the first fastener and parallel to the first plate. The second plate forms a second fastener (25) at an edge thereof. The second fastener includes a pair of double-layer latches (252) received in the cutouts of the first plate and interengaged with the tabs of the first plate. The first fastener is located between the pair of latches. The heat pipes are inserted through the first and second plates between said edges. The first and second plates then abut each other at said edges.

Abstract: Disclosed is a heat exchanger including: a plurality of tubes through which refrigerants flow, the tubes being spaced away from one another; and a fin through which the tubes are perpendicularly inserted, and having a fin collar for supporting the inserted tube, a seat for supporting an outer circumference of a lower end of the fin collar, and three or more peak portions and three or more valley portions that are alternately disposed at an area defined between the tubes to cause air flow to vary at an area defined between the fin collar, heights of at least two peak portions or depths of at least two valley portions being different from each other.

Abstract: A heat exchanger including a passageway having an internal passage adapted to form a first flow path, and an array of conduits having internal passages that collectively form a second flow path. The conduits extend through the internal passage of the passageway, and a first conduit of the array is provided with a lower total heat exchange surface area per unit volume therein than a second conduit of the array. A method of performing chemical processes is provided that includes providing a catalyst bed within the second flow path, and minimizing a temperature differential between a maximum temperature of a fluid in the second flow path and a minimum temperature of the fluid in the second flow path.

Abstract: The present invention relates to a radiator sheet improvement and more particularly to a structure with enhanced strength and increased heat exchange surface after assembling, which is achieved first by forming large holes and adjacent small holes on each radiator sheet, wherein a radiator tube passing through each large hole and a solder rod or tin solder inserted into each small hole, and then by using heat to melt solder to fill the space between the radiator sheet and the radiator tube, thereby enabling a firm bonding effect therebetween.

Abstract: Perforated fins are provided to improve the capabilities of fin and tube type heat exchangers, and to adapt them for flow outside of the tube that is essentially parallel to the axis of the tube. The fins are made of a thermally conductive material, such as metal, with perforations in the fins. Fins can be of any shape. Typically, one or more tubes or binding posts pass through the fins. The fins are attached to the tube or post by press fitting, furnace or torch brazing, welding, or other method of mechanical bonding. The perforations allow heat exchange with the contents of a tube of a fluid flowing essentially parallel to the axis of the tube, in contrast to conventional fin-tube heat exchangers. The fins may also be bonded to a post or other securing means and inserted into the inside of a tube or other hollow body to improve efficiency of heat exchange. In addition, the fins may carry a catalyst, optionally carried on a washcoat or similar treatment to increase surface area.

Abstract: An evaporator for disposition along an air flow for cooling the air. The evaporator comprises a continuous serpentine tube having an inlet and an outlet and a plurality of inner fins attached to the serpentine tube. The serpentine tube including at least one column of tube runs. The tube runs are grouped into tube run sets. Each tube run set is defined by at least one reverse bend and the tube runs extending from the ends of the at least one reverse bend. The centerline of each tube run set is not parallel to the centerline of an adjacent tube run set. Each inner fin extends between at least two tube runs of a tube run set.

Abstract: A heat exchanger apparatus 10 that has one or more tubes 12 for carrying a first heat transfer fluid, such as a refrigerant. Fins are provided in thermal communication with the tubes. Some of the fins have fin collar bases 16 that are positioned around the outside perimeters of the tubes 12. One or more bumps 20 protrude from at least some of the fin collar bases 16. The bumps disturb a second heat transfer fluid, such as air, that passes over the fins 14 and the tubes 12. Also disclosed is a method for improving the efficiency of heat exchangers.

Abstract: Heat exchange unit for pseudo-isothermal reactors including a substantially cylindrical shell (2) closed at its opposite ends by respective bottoms (3, 4), at least one thereof is provided with at least one manhole opening (5) of predetermined dimensions, a reaction zone (6) inside the shell (2) in order to contain a catalytic bed, comprising at least two modular and assembly heat exchangers (11), having predetermined cross dimensions smaller than those of the manhole opening (5), each heat exchanger (11) comprising at least one heat exchange element (12).

Abstract: A high efficiency heat exchanger is shown which can be incorporated into a finned tube water heater. The heat exchanger has a pair of flow manifolds each having a water inlet and a water outlet and a series of connecting openings. Circular flow tubes have connecting ends which fit within the connecting openings of the manifold so that the tubes are arranged in a stacked fashion to form a tube bundle. When incorporated into a water heater, a burner communicates with the interior space within the stacked tube bundle for producing products of combustion for heating water flowing in the flow tubes. The flow tubes have external fins which are crushed to form upper and lower flat stacking surfaces for stacking the tubes to form the tube bundle. The fins are also crushed to form angled baffled surfaces about a external periphery of the tubes. The baffle surfaces serve to retain heat from the products of combustion of the burner which are released into the interior space within the stacked tube bundle.

Abstract: A fin is disclosed for use in a heat exchanger coils including tube segments extending through the fin. The fin includes a corrugated sheet of material having a plurality of major corrugations, about 8 to about 24 corrugations per inch (2.54 cm), each major corrugation being a peak or a valley with an amplitude “h” at the peaks or the valleys perpendicular to a reference major plane equally bisecting the major corrugations, and a width “w”; a plurality of orifices; a collar perpendicular to the reference major plane and extending from the sheet around each of the orifices; and a generally flat area that is generally parallel to or generally coextensive with the reference major plane and that surrounds each collar. The major corrugations have angled walls extending from at least one of the peaks and valleys to the generally flat areas adapted to create a vortex when air travels over the fin. A ratio of “h” to “w” is about 0.32 to about 0.7.

Abstract: Disclosed is a heat exchanger including a plurality of tubes through which refrigerants flow, the tubes being spaced away from each other, and a plurality of fins through which the tubes are perpendicularly inserted, the fins being spaced away from each other at a predetermined distance, each of the fin having more than four peak portions and more than four valley portions that are alternately disposed. Heights or depths of at least two peak portions or at least two valley portions being different from each other.

Abstract: The added expense of providing fixtures for holding side pieces in heat exchangers in place during assembly is avoided in a heat exchanger having a core with at least one row of spaced, parallel, straight runs (12-20); (70-86) of flattened tubing (10) which includes first and last spaced side runs (12), (20); (70), (92) which define an associated side on opposite sides of the row. Fins (36), (62) bridge the spacing between each of the plurality of runs and extend oppositely from outwardly facing sides (42), (44); of the first and last runs (12), (20); (70), (92); and are bonded to the tubing (10). A pair of side pieces (46), one for each side of the row, are provided and are hooked on the associated ends of the first and last runs (12), (20); (70), (92). The side pieces (46) are self-fixturing by reason of being hooked on the tubing.

Abstract: A heat sink includes multiple heat dissipating fins each with two opposite side walls. Multiple micro bosses are formed on a periphery of the heat dissipating fin. Each heat dissipating fin is securely connected to an adjacent heat dissipating fin via secure engagement between the side walls and a bottom face of the adjacent heat dissipating fin. Each micro boss is in the order between 10−6 to 10−9 mm so that laminar effect to decrease heat dissipating capability of the heat sink is avoided.

Abstract: An assembly includes a heat pipe and one or more fins. The heat pipe has an envelope with two elongated flat sides and two curved portions connecting the flat sides. The elongated sides have a length that is substantially greater than the radius of curvature of the curved portions. Each fin comprises a plate. The plate has a hole through it. The hole is sized to accommodate the envelope. The hole has two elongated flat sides and two curved portions connecting the flat sides. The elongated sides have a length that is substantially greater than a radius of curvature of the curved portions. The plate has at least one collar portion adjacent to the hole. The collar portion extends approximately in a direction normal to the plate. The collar portion is sized so as to accommodate the method of attachment of the fin to the envelope.

Abstract: A heat exchanger is provided for a refrigerator and includes one or more refrigerant tubes for refrigerant flow, and a plurality of straight fins having lengths different from each other fitted to the refrigerant tubes at fixed intervals in parallel to each other by means of through holes formed therein. The heat exchanger includes sections having different intervals or spaces between fins, wherein sections with the smallest fin spaces have a size 75% or less of a total size of the heat exchanger.

Abstract: A refrigerated merchandiser (100) includes an upright, open-front, insulated cabinet (110) defining a product display area (125) connected in airflow communication with a compartment (120) via an air circulation circuit (122, 114, 116). The flow of refrigerant through the coils (46) of evaporator (40) disposed in the compartment (120) to cool the airflow from the product display area of the refrigerated merchandiser.

Abstract: A condenser of a condensing-type clothes dryer includes a plurality of condensing ducts provided in a middle portion of a circulation duct, the condensing ducts condensing air being circulated there-through after being discharged from a drum; and a plurality of cooling fins provided to be in contact with an outer surface of the condensing ducts, wherein an interval or a pitch of the cooling fins is different partially according to a flow rate of air blown from a cooling fan for a heat-exchange with air flowing through the condensing duct. At this time, the pitch or interval of the cooling fins is narrow at a portion where air blown from the cooling fan flows fast, and the pitch or internal of the cooling fins is wide at a portion where air blown from the cooling fan flows slowly.

Abstract: An axial heat-dissipating device includes a heat-dissipating unit and a fan unit. The heat-dissipating unit includes an upright heat-transfer member having a lower end adapted to be disposed on a heat-generating source, a plurality of angularly spaced apart heat-dissipating fins provided on the heat-transfer member, and a hollow shell body that is disposed to surround the heat-dissipating fins. The shell body has a top end portion and a lower end portion which is formed with at least one radial air inlet that permits flow of air into the shell body. The fan unit is mounted on the top end portion of the shell body, and is operable so as to draw hot air out of the shell body.

Abstract: A heat dissipating assembly (1) includes a plurality of fins (10), three heat pipes (20), and a base (30). Each fin defines three through holes (11) across a middle portion thereof. A plurality of dome-shaped protruding portions (14) is formed in each fin. The protruding portions are arranged in a regular array of offset rows. Adjacent protruding portions in any row protrude from front and rear faces of the fin in a regular alternating configuration. One end of each heat pipe is respectively inserted into the corresponding through holes of the fins, and an opposite end of each heat pipe is attached in the base. The base is attached on an electronic device, for absorbing heat produced by the electronic device. The protruding portions increase a heat dissipating surface area of the fins, and deflect airflow that passes across the fins in a direction parallel to the fins.

Abstract: An air flow apparatus including an elongate post and a plurality of fin disks disposed on the elongate post, each fin disk including a centrally disposed opening therein for receiving the elongate post, and a plurality of flow openings disposed around the periphery of the centrally disposed opening. The air flow apparatus is preferably used in conjunction with a circulation device to form a heat exchanger.

Abstract: A heat sink includes a plurality of spaced laminas made of a thermally conductive material. Each of the laminas is integrally formed with a pair of convexo-concave spacers that each project from a first face of the lamina and define a cavity in a second face of the same lamina. Furthermore, each of the convexo-concave spacers is adapted to be partially and tightly fitted in a mating cavity of the next lamina.

Abstract: A pivot assembly for the damper vane of a hot water baseboard heater has a base which slides into the channels of the damper vane and a projection which snaps into a hole on a respective support bracket of the baseboard so that fingers of the projection spread on one side of the bracket while a pair of resilient arms are braced against the other side.

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 sink includes a plurality of spaced fins made of a thermally conductive material. Each of the fins has a through-hole surrounded by an annular wall. The annular wall is additionally provided with an axial slot which has a front end at a certain distance from a distal end of the annular wall and which extends to the related fin to form an aperture therein. A heat-conductive rod is inserted in the through-holes of the fins and fitted in the annular walls. Moreover, a bar is inserted in the apertures in the fins. The bar is made of low melting material so as to join the fins to the heat-conductive rod after the bar has been melt and then hardened.

Abstract: An object of the present invention is to provide a heat exchanging fin capable of preventing cracks from forming in the flares of the collared tube holes, even if the metallic plate section is made of the thin and tough material. In the heat exchanging fin, a metallic plate section has a plurality of tube holes. A plurality of collars are respectively extended from edges of the tube holes. A plurality of flares are respectively formed at front ends of the collars. Each flare includes a plurality of radially extended sections, which are radially outwardly extended from the front end of each collar, and separation between the metallic plate section and each radially extended section is fixed.

Abstract: The present invention discloses a heat exchanger fin having three rows of slit parts being arranged at the air inlet side and another three rows at the air outlet side relative to the centerline of heat transfer pipes 102, in order to reduce the ventilating resistance, prevent the growth of a boundary layer and reduce a dead zone on the downstream of the heat transfer pipes 102 to thus increase heat transfer performance. The outer slit parts 111 and 111′; and 116 and 116′ at the air inlet side and at the air outlet side are formed in pairs. The middle slit parts 112 and 112′ at the air inlet side are formed in pairs and the middle slit part 114 at the air outlet side is formed in a unit. The inner slit parts 113 and 114 at the air inlet side and at the air outlet side are also formed in a unit.

Abstract: A widthwise one half portion of a core section 5a is constituted by a first section 20 formed by stacking a plurality of first elements having first and second linear channels 34 and 35 inside them and fins, and a widthwise other half portion thereof is similarly constituted by a second section 21 formed by stacking a plurality of second elements respectively having U-shaped channels 46 inside them and fins. The number of times the refrigerant fed into a thicknesswise one half portion on an inlet tank 47 side of the first section 20 is turned back in an opposite direction concerning a longitudinal direction of the first linear channels 34 inside this thicknesswise one half portion is made more numerous than the number of times the refrigerant fed into a thicknesswise other half portion on an outlet tank 52 side of the first section 20 is turned back in the opposite direction concerning the longitudinal direction of the second linear channels 35 inside this thicknesswise other half portion.

Abstract: A metallic cooling fin for a motor vehicle heat exchanger has a central part having at least one set of fixed inclined lamellae, of selected form and spaced apart by apertures, the dimensions of which are predetermined to enable a fluid to pass between the lamellae. The lamellae in a common set are distributed in at least two groups, with the respective inclinations of the lamellae varying from one group to the other.

Abstract: A method of making an evaporator and the resultant evaporator. The resultant evaporator comprises a continuous serpentine tube having an inlet and an outlet. The serpentine tube includes at least one column of parallel tube runs. Each tube run is defined by at least one reverse bend. The column of parallel tube runs has an overall length defined by the distance between the outermost tube runs. The evaporator further comprises a plurality of inner fins attached to the individual tubes. Each inner fin extends between two tube runs defined by opposite ends of a reverse bend. The inner fins have a length less than the overall length the column of tube runs.

Abstract: A radiation fin set comprising a plurality of metallic radiation fins arranged in parallel for direct welding/bonding to a beat dissipation base panel or mounting on a heat dissipation tube at the heat dissipation base panel, the radiation fins each having a plurality of elongated slots and a plurality of flanges respectively extended along one side of each of the elongated slots and sloping in one direction at an angle of slope for guiding the flow of air of high momentum into mixing with the flow of air of low momentum to repress the formation of boundary layer and to improve heat dissipation efficiency of the radiation fins.

Abstract: A heat exchanger fin collar for a plate-fin heat exchanger having close tolerance dimensions for achieving greater contact area on the tube. The fin collar comprises an elongated fin portion for dissipating heat and a leg connected with the fin portion. The leg has a height and includes a straight contact portion substantially perpendicular to the fin portion, wherein the contact portion has a contact height along which the contact portion contacts the tube. The height is in the range of 0.008 to 0.080 inches. It also includes a first curved end portion having a first radius extending from a first end of the contact portion and a stepped transitional portion connecting the contact portion and the elongated fin portion. The transitional portion has a second curved end portion having a second radius, wherein the second curved end portion extends from the contact portion opposite the first end. A method for forming the fin collar and a heat exchanger are also disclosed.

Abstract: A radiating fin assembly for thermal energy engine comprises a plurality of spacer members each having a plurality of insertion holes, a plurality of radiating plates each sandwiched between two adjacent spacer members and each having a plurality of insertion holes, and a plurality of insertion pins passing through corresponding insertion holes of the spacer members and corresponding insertion holes of the radiating plates to assemble the spacer members with the radiating plates. The spacer members and the radiating plates further have central circular apertures and the radiating fin assembly reduces a temperature of a hot body when the hot body is arranged within the central circular apertures.

Abstract: A recess portion for setting an attachment position is formed in each plate fin at positions adjacent to both longitudinal ends of the plate fins on both upstream and downstream ends in an air flowing direction. Therefore, air passing through the plate fins is disturbed by a standing wall portion of the recess portion around the longitudinal ends of the plate fins. Thus, it can prevent a thermal boundary layer from being expanded in a heat exchanger having the plate fin, and heat-transmission efficiency can be improved in the heat exchanger. As a result, an entire area of the plate fin can be effectively used, thereby improving heat-exchanging capacity of the heat exchanger.

Abstract: A heat dissipating structure includes a heat dissipating element which has an upper flange and a lower flange formed respectively at the upper and lower edges thereof, and a convection zone located between the upper and lower flanges. The upper flange has two ends each has a fastening section. The lower flange has one fastening section at the center, two ends extended downwards to form respectively a fastening foot and form an indented zone with the lower flange. Two or more heat dissipating elements may be stacked and engaged through the fastening section to form an assembled element. Two assembled elements may be juxtaposed and bonded at the fastening foot to form a housing chamber therebetween to house a heat dissipating tube thereby to dissipate heat rapidly.

Abstract: An exhaust gas cooling system for a vehicle includes a cooling fin system retrofit and a side exhaust pipe retrofit having an exhaust gas exit pipe having a first portion having a plurality of mixing portions which are either bends or internal mixing fins configured to mix vehicle exhaust gas, but not to restrict exhaust gas flow, a second portion fastened to the first portion and a chrome coated third portion fastened to the second portion and extending along the side of the vehicle. The cooling fin system retrofit includes an adjustable clamp and one or more cooling fins, each cooling fin having a base having a pair of upstanding arms, with one arm of the pair having a lip for engaging an arm of another cooling fin. An exhaust gas cooling system kit, a side exhaust pipe retrofit kit, a cooling fin kit are included.

Abstract: Heat exchange unit for pseudo-isothermal reactors including a substantially cylindrical shell (2) closed at its opposite ends by respective bottoms (3, 4), at least one thereof is provided with at least one manhole opening (5) of predetermined dimensions, a reaction zone (6) inside the shell (2) in order to contain a catalytic bed, comprising at least two modular and assembly heat exchangers (11), having predetermined cross dimensions smaller than those of the manhole opening (5), each heat exchanger (11) comprising at least one heat exchange element (12).

Abstract: The invention relates to a heat exchanger unit to be used in a gas-fired water heater in which heater a heat exchanger unit contains tubes with fins. According to the invention the heat exchanger unit contains flat oval tubes (1,21,31) having a fin (3,22,32) at least on one flat part (4,24,33). The flat oval tubes (1,21,31) as well as the fins (3,22,32) are made of copper, copper-based alloy, aluminium or aluminium-based alloy.

Abstract: Problems due to fin fall-out in the manufacture of heat exchangers having flattened tubes (14) with interposed serpentine fins (16) are eliminated by providing the exterior sides (22), (24) of the tube (14) with elongated, relatively sharp ridges (36). The ridges (36) form deformations (52) in the crests of the fins (16) which lock the fins (16) and the tubes (14) together during the brazing process, thereby preventing such fall-out.

Abstract: A net-shape molded composite heat exchanger is provided which includes a plurality of thermally conductive fins overmolded onto one end of a metallic heat pipe for use both as an antenna in a cellular telephone and a heat exchanger to dissipate the heat generated within the device. The heat exchanger is formed by net-shape molding the fins over one end of the heat pipe, from a thermally conductive composition, such as a polymer composition. The molded heat exchanger is freely convecting through the part, which makes it more efficient and has an optimal thermal configuration. In addition, the metallic heat pipe serves the additional function of conducting radio frequency waves to and from the cellular telephone device.

Abstract: An aluminum alloy composite material includes a higher strength aluminum alloy core material layer and at least one cladding aluminum alloy material layer having a higher electrical conductivity than the core material. The cladding layer is positioned adjacent to the core and the composite is adapted for particular application in heat exchangers where brazing is conducted under controlled atmospheres with special flux materials. The core material has an electrical conductivity less than 50% IACS and the cladding layer has an electrical conductivity greater than 50% IACS. The cladding layer can be on one or both surfaces of the core layer. The thickness of the cladding layer can range between about 2.5 and 40% of the overall composite thickness depending on whether one or more cladding layers are employed. The cladding layer also has a corrosion potential more negative than the core layer for enhanced corrosion resistance.

Abstract: Fin tube heat exchanger including heat exchange tubes each having an inside for flow of fluid therethrough, and sheets of cooling fins stacked at fixed intervals each having the heat exchange tubes passed therethrough in a row pitch L2, a direction along an air flow, in a range of 1.8 D0≦L2≦2.2 D0and in a step pitch S2, a direction perpendicular to the air flow, in a range of 3.3 D0≦S2≦4.5 D0, where D0denotes a diameter of the heat exchange tube, and projection pieces between the tubes opened for the air flow, thereby reducing a power consumption, noise, to improve reliability of the user, and saving production cost and making the heat exchanger compact.

Abstract: A fin and tube heat exchanger includes fins shaped along dynamically, empirically determined isothermal lines. The fins preferably have deflectors along a trailing edge thereof to concentrate heat flux into a back row of tubes. The deflectors bridge adjacent fins to define baffles. The preferred fin shape may be obtained empirically by trimming fin areas exhibiting excessive temperatures during operation.

Abstract: A heat sink structure having a pipe attached to a plurality of fins for dissipating heat into an environment. Each fin in the plurality is constructed of a thermally conductive material and has a cavity formed therein dimensioned for seating about the pipe exterior surface. An opening or notch extends from the edge of each of the fins to the cavity to facilitate the spread of an adhesive or solder to the fin/pipe interface for providing thermal and physical coupling of the plurality of fins to the pipe.

Abstract: A stackable heat sink having a core shaft in heat-engaging relation with a semiconductor device and a plurality of individual thin fins having an opening for receiving the core shaft in press fit relation so that a plurality of the fins, when mounted on the shaft, define a plurality of air passageways and the fins and shaft efficiently transfer heat away from the semiconductor device and into the surrounding atmosphere. In an improved version of the heat sink, the heat-dissipating fins may be corrugated so as to increase the surface area of each individual fin without increasing its perimeter. A heat pipe may be used in conjunction with the core shaft or base of the heat sink so as to facilitate heat transfer away from the electronic component. An improved heat sink may also include a base having a plurality of openings and a small fan connected to the portion of the base with the openings, so as to direct air across and between adjacent fins.

Abstract: A method of making an evaporator and the resultant evaporator. The resultant evaporator comprises a continuous serpentine tube having an inlet and an outlet. The serpentine tube includes at least one column of parallel tube runs. Each tube run is defined by at least one reverse bend. The column of parallel tube runs has an overall length defined by the distance between the outermost tube runs. The evaporator further comprises a plurality of inner fins attached to the individual tubes. Each inner fin extends between two tube runs defined by opposite ends of a reverse bend. The inner fins have a length less than the overall length the column of tube runs.

Abstract: A cathode ray tube includes a deflection unit (11) having a cooling fin (25) which is attached to the surface of a tapering surface on a yoke ring (23) by lugs (27). At least one of the lugs has a free end extending axially and outwardly in thermal contact with the tapering surface, and at least another of the lugs has a free end extending axially in an opposite direction and inwardly in thermal contact with the tapering surface.

Abstract: A heat exchanger tube having an internal surface that is configured to enhance the heat transfer performance of the tube. The internal enhancement has a plurality of polyhedrons extending from the inner wall of the tubing. The polyhedrons have first and second planar faces disposed substantially parallel to the polyhedral axis. The polyhedrons have third and fourth faces disposed at an angle oblique to the longitudinal axis of the tube. The resulting surface increases the internal surface area of the tube and the turbulence characteristics of the surface, and thus, increases the heat transfer performance of the tube.

Abstract: A heat exchanger comprising a precooler and reheater core adjacent a chiller core, first heat transfer passages extending through both cores through which incoming air passes in a first direction, second heat transfer passages extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages extending through the precooler and reheater core through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A manifold contiguous with both cores conducts chilled air from the chiller core to the third set of heat transfer passages.Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air to a usable temperature.

Abstract: A heat exchanger comprises a tube 11 and fin plates 12 attached to the outer surface of the tube. Each fin plate 12 is in the form of a strip sheet which is wider than the diameter of the tube 11, and each fin plate 12 is fitted on the tube 11 and has a semicylindrical recess 20 in the form corresponding to the cylindrical shape of the tube 11. Flat fins 21 extend from both sides of the semicylindrical recess 20. Cut pieces 22a are formed each by a U-shaped cut 22 at a predetermined pitch in the longitudinal direction of the semicylindrical recess 20, and each cut piece is erected outwardly of the semicylindrical recess to thereby form an upstanding fin 23, which is formed on a first fin plate element 18 as well as a second fin plate element 19. Straight tube portion 15 of the tube 11 is fitted between the semicylindrical recesses 20 of the first fin plate element 18 and the second fin plate element 19. In this way, the tube and the fin plate 12 are secured.