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: 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: The invention relates to a jet-weaving machine, particularly an air jet-weaving machine, which comprises a main discharge nozzle (1) with a mixing tube (2) for introducing a weft thread (3) into a shed by means of a conveying fluid discharged from the main discharge nozzle (1), and comprises a clamping device. This clamping device is placed inside the mixing tube (2) in the area from which the weft thread exits, and is provided with an actuator, which is situated outside of the mixing tube (2) and with a lever that is connected thereto in such a manner that this lever, when actuating the actuator (6) via an actuating means or when the actuation is stopped, executes a tilting motion whereby clamping the weft thread in an opening of the mixing tube between itself and an abutment (9).

Abstract: A heat dissipating module includes a plurality of heat dissipating fins stacking together in a parallel manner, a plurality of base boards soldering on the heat dissipating fins and a heat transfer duct running through the heat dissipating fins. Each of the dissipating fins has a first portion and a second portion which is formed by bending two sides of the first portion forwards in a vertical manner. The second portion on the same side is coupled to form a coupling surface which is soldered on the base boards. By incorporating the heat transfer duct a firmer heat dissipating module structure is formed.

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: 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: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which include dissimilar internal configurations. The heat exchangers include multiple sets of multichannel tubes in fluid communication with each other. One set of multichannel tubes contains flow channels of one shape and size while the another set of multichannel tubes contains flow channels of a different shape and/or size. The dissimilar flow channels within the multichannel tube sets allow each set of tubes to be configured to the properties of the refrigerant flowing within the tubes.

Abstract: A multichannel heat exchanger is provided that may be used in any suitable application, such as air conditioning, refrigeration, heat pump, and similar systems. The heat exchanger provides for enhanced thermal exchange density within reduced envelope dimensions. Multichannel tubes may be oriented such that their major width is generally in a vertical plane, but such that their edges are inclined with respect to the vertical. The resulting envelope dimensions are reduced. Moreover, liquid condensate that may collect on the heat exchangers (e.g., when used as evaporators) may be channeled toward lower edges of the multichannel tubes along which the condensate flows for evacuation and collection.

Abstract: Heat exchangers containing various tube configurations and a heating, ventilation, air conditioning and refrigeration (HVAC&R) system employing these heat exchangers are provided which allow flexibility in directing fluids through a heat exchanger. Groups of tubes may be placed at different locations within a heat exchanger slab in order to tailor the heat transfer properties of each tube group to their location on the heat exchanger slab. Groups of tubes may be connected using manifolds to create coil circuits.

Abstract: A heat exchanger which, while having excellent heat exchanging performance, has a structure easy to produce, is of low cost, and has high quality and reliability. The heat exchanger has first base plates (26), in each of which first slits (30) and second slits (40) are provided in substantially parallel to each other, and has second base plates (28), in each of which third slits (50) with substantially the same shape as a first slit (30) are provided. The length in the longitudinal direction of a second base plate (28) is set to be less than the length of a second slit (40). The first base plates (26) and the second base plates (28) are layered over each other such that the first slits (30) provided in the first base plates (26) and the third slits (50) provided in the second base plates (28) are communicated. Flow paths (60) outside tubes are constructed by the first slits (30) provided in the first base plates (26) and the third base plates (50) provided in the second base plates (28).

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: A heat exchanger for use in a vehicle air conditioning system is provided. The heat exchanger includes a plurality of heat exchanger registers adapted to transfer heat from an air flow passing thereby to a refrigerant flowing therethrough. The heat exchanger further includes a plurality of junction elements in fluid communication with the heat exchanger registers. Each of the junction elements is disposed between one of a pair of top collector lines and a pair of bottom connector lines of the heat exchanger registers. The junction elements have a hydraulic flow area that militates against pressure losses over the heat exchanger. A heat exchanger having an arrangement of three heat exchanger registers and a vehicle air conditioning system including the heat exchanger are also provided.

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 cooling heat exchanger has first and second heat transfer plates joined to each other. Each of the first and second heat transfer plates has protrusions protruding from a base portion thereof for defining internal fluid passages, a fin portion projecting from the base portion in the same direction as the protrusions and defining a fin inner space, and an aperture on the base portion at a position corresponding to the fin portion. The fin portion includes an offset wall that is offset from the base portion and connected to the base portion at two positions. The aperture of the first heat transfer plate is displaced from the aperture of the second heat transfer plate with respect to a longitudinal direction of the protrusions so that a communication channel that allows communication between the fin inner spaces of the first and second heat transfer plates is provided for draining condensation.

Abstract: A heat exchanger cooling fin (401), for use in a fluid flow environment, comprising a fin plate (402) having a series of substantially mutually parallel louvres (403), each louvre (403) having a convex curved surface (404) facing in the opposite direction to each adjacent louvre (403), said series of louvres defining a nominal fluid flow path along the series over said convex curved surface (404) of each louvre (403).

Abstract: Devices for cooling and humidifying a reformate stream from a reforming reactor as well as related methods, modules and systems includes a heat exchanger and a sprayer. The heat exchanger has an inlet, an outlet, and a conduit between the inlet and the outlet. The heat exchanger is adapted to allow a flow of a first fluid (e.g. water) inside the conduit and to establish a heat exchange relationship between the first fluid and a second fluid (e.g. reformate from a reforming reactor) flowing outside the conduit. The sprayer is coupled to the outlet of the heat exchanger for spraying the first fluid exiting the heat exchanger into the second fluid.

Abstract: An apparatus and a method for cooling charge air, comprising the steps of cooling at least one cooling agent conduit with a cooling agent (Step 401), flowing thermally charged air through a plurality of charge air conduits positioned in proximity to the at least one cooling agent conduit (Step 402), circulating ambient air to contact the cooled at least one cooling agent conduit whereby the ambient air is cooled (Step 403), and circulating the cooled ambient air to contact the plurality of charge air conduits whereby the plurality of charge air cooler conduits are cooled further cooling the thermally charged air present within (Step 404).

Abstract: An apparatus and a method for cooling charge air, comprising the steps of introducing a cooling agent into at least one cooling agent conduit whereby the at least one cooling agent conduit is cooled (Step 401), flowing thermally charged air through a plurality of charge air conduits positioned in proximity to the at least one cooling agent conduit (Step 402), directing ambient air to contact the cooled at least one cooling agent conduit whereby the ambient air is cooled (Step 403), and directing the cooled ambient air to contact the plurality of charge air conduits whereby the plurality of charge air cooler conduits are cooled further cooling the thermally charged air present within (Step 404).

Abstract: A separation wake zone behind a heat transfer tube in a heat transfer device of a heat exchanger or the like is reduced, whereby a heat transfer action of the heat transfer device can be augmented and a pressure loss thereof can be reduced. The heat transfer device of the heat exchanger has a linear or tubular heat transfer object (T) in heat transfer contact with a heat carrier fluid (A), and a heat transfer fin (F) integrally formed with the heat transfer object for heat transmission therebetween. The heat transfer fin is provided with a guide fin (10) positioned in vicinity of the heat transfer object, and the guide fin conducts the fluid to the rear of the heat transfer object, thereby reducing the separation wake zone behind the heat transfer object.

Abstract: An A-coil heat exchanger includes a header for receiving a heat transfer fluid after the fluid has passed through the interior of the heat exchanger. The header is comprised of a main body section and first and second tubular branches depending therefrom. The first tubular branch is in fluid communication with a first coil slab of the heat exchanger by means of a first set of adapter tubes extending between the first tubular section and the first coil slab. The second tubular branch is in fluid communication with a second coil slab of the heat exchanger by means of a second set of adapter tubes extending between the second tubular branch and the second coil slab. Each of the adapter tubes defines a generally straight section of conduit between the corresponding tubular branch and the corresponding coil slab.

Abstract: A heat sink includes a plurality of fins parallel to each other, and one heat pipe extending through these fins. A flow channel is formed between each pair of neighboring fins for channeling an airflow generated by an electric fan. A guiding member having a curved shape is arranged around the through hole for guiding the airflow flowing to the heat pipe. A space formed and surrounded by the guiding member is a tapered space, which narrows gradually along the direction of the airflow so as to guide the airflow flowing to the heat pipe.

Abstract: A heat exchanger for a refrigerator with improved heat transfer efficiency by inducing turbulent flow in a refrigerant flowing along a refrigerant guiding tube. The heat exchanger for the refrigerator comprised of: the refrigerant guiding tube configured to allow the refrigerant to flow there through; a plurality of heat exchange fins disposed around an outer peripheral surface of the refrigerant guiding tube, the plurality of heat exchange fins increasing a heat exchange area of the refrigerant guiding tube; and a turbulent flow inducing member positioned in the refrigerant guiding tube, whereby the turbulent flow inducing member is configured to cause the refrigerant flowing along the refrigerant guiding tube to form a turbulent flow.

Abstract: A heat exchanger is provided that is capable of performing heat exchange more efficiently by using slits. The heat exchanger includes a refrigerant pipe for allowing a refrigerant to flow therethrough, at least one fin disposed such that the refrigerant pipe penetrates through the at least one fin for performing heat exchange with air passing by the at least one fin, at least one slit formed by partially cutting out the at least one fin, and at least one slit fin extending from the at least one fin adjacent to one side edge of the at least one slit for inducing turbulent flow in air flowing along a flow channel spaced a predetermined distance from the at least one fin. The width of the at least one slit is greater than or equal to ? of the diameter of the refrigerant pipe. Turbulent flow is induced in air flowing through the heat exchanger by one side edge of the slit disposed downstream of the flow direction of air. Consequently, heat exchange efficiency of the heat exchanger is improved.

Abstract: A heat exchanger has a flat tube and a header in communication with the flat tube. The flat tube has a flat passage part and a groove part. The flat passage part defines a fluid passage therein. The groove part extends along the flat passage part. An end of the groove part is recessed from an end of the flat passage part in a longitudinal direction of the flat tube. The header has a tube insertion hole having a shape corresponding to an outline of the flat passage part. The end of the flat passage part is received in and fixed to the tube insertion hole of the header.

Abstract: A modularized cooler includes the at least two heat radiator modules arranged in a stack, each heat radiator module having a set of radiation fins, heat-exchange tubes arranged in parallel and surrounded by the radiation fins, two locating plates holding the heat-exchange tubes in place, and a plurality of first bends and second bends respectively connected between every two adjacent heat-exchange tubes at two sides of the radiation fins and forming with the heat-exchange tubes a continuously S-shaped piping having an inlet and an outlet, and at least one connecting tubes that connect the S-shaped pipings of the heat radiator modules in series.

Abstract: A heat exchanger for exchanging heat with gas made to flow in a flow direction is disclosed. The heat exchanger is provided with: a plurality of plates each having a first side and a second side; a plurality of tubes configured to conduct a thermal medium, the tubes penetrating the plates and being arranged in parallel with each other and on a plurality of planes perpendicular to the flow direction, wherein the tubes on each plane are disposed adjacent to gaps between the tubes on any of adjacent planes so as to form a plurality of serpentine flow lines among the tubes; and a plurality of bridges projecting on the first sides of the plates, the bridges being respectively arranged to be perpendicular to the serpentine flow lines.

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: 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 present invention provides a heat exchanger which is assembled by brazing an aluminum fin material to the outer surface of an aluminum tube material formed by bending a sheet material, in particular, an aluminum heat exchanger which can be suitably used as an automotive heat exchanger such as a condenser or evaporator. The tube material is formed of a two-layer clad sheet which includes a core material and an Al—Zn alloy layer clad on the core material. The Al—Zn alloy layer is clad on the outer surface of the tube material and brazed to the aluminum fin material. The potential of the Al—Zn alloy layer in a normal corrosive solution is at least 100 mV lower than the potential of the core material in the normal corrosive solution. The potential of the Al—Zn alloy layer in the normal corrosive solution is lower than the potential of the core material in high-concentration corrosive water. The normal corrosive solution refers to an aqueous solution containing 10 g/l of NaCl and 0.

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: 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 includes a plurality of tubes through which refrigerants flow, the tubes being spaced apart from each other, and a plurality of fins spaced apart from each other at a predetermined distance. Each of the fins has fin collars through which the tubes are perpendicularly inserted, seat portions concentrically formed around outer circumferences of the fin collars and provided with laterally-opened front and rear portions, more than two peak portions, and more than two valley portions, the peak and valley portions being alternately disposed to provide airflow variation.

Abstract: A plurality of fin groups 12 each comprising parallel plate fins 14 are arranged on two straight tube portions 11a of a fin fixing hairpin tube 11 longitudinally of the tube portions at a spacing, by forming two tube inserting holes 14a as spaced apart in each of the plate fins 14 and inserting the two straight tube portions 11a through the respective holes 14a of the plate fins 14. The hairpin tube 11 is enlarged with use of a fluid to fixedly fit the plate fins 14 of the fin groups 12 around the straight tube portions 11a of the tube 11. The straight tube portions 11a of the tube 11 each have a finless part 13 provided between each pair of adjacent fin groups 12. The finless part 13 of each straight tube portion 11a bears clamp marks 19 on the outer peripheral surface thereof. A heat exchanger comprising a heat exchanger finned tube 10 thus constructed is adapted to diminish leakage of the refrigerant and achieves a desired refrigeration efficiency.

Abstract: A composite heat exchanger having functions of air cooling and spray cooling, includes two base plates, a fin group between the base plates, and a flow conduit. The fin group includes a plurality of fins. Each fin is defined with a plurality of receiving holes. The flow conduit parallelly extends through the receiving holes and surrounds an outside of the fins whereby the outside surface of the flow conduit surrounding the fins directly contacts atomized heat exchange media for heat transfer through phase change.

Abstract: A unit-type heat exchanger for use as a condenser in motor vehicle air conditioners and an oil cooler for various oils use in motor vehicles. An oil cooler 1 and a condenser 2 are arranged one above the other and assembled into a unit. Each of these components 1, 2 has two pipelike headers 10, 20 arranged in parallel to each other at a spacing, and a plurality of parallel exchange tubes 11, 21 joined at opposite ends thereof to the two headers 10, 20. The adjacent oil cooler 1 and condenser 2 have ends thereof positioned in proximity to each other and connected to each other by connectors 3. Each of the connectors 3 is provide at opposite sides thereof with respective recessed portions 30, 31 for opposed ends of the headers 10, 20 to be fitted therein, and these header ends are fited in the respective recessed portions 30, 31 and joined to the connector 3. The unit-type heat exchanger is adapted to prevent mixing of the fluids flowing inside the oil cooler 1 and the condenser 2, respectively.

Abstract: A combination cooler includes a first circuit having a first series of tubes defining a first hydraulic diameter. The first fluid circuit is adapted to communicate a first fluid from a first inlet to a first outlet. A second fluid circuit includes a second series of tubes defining a second hydraulic diameter and a third series of tubes defining a third hydraulic diameter. The second fluid circuit is adapted to communicate a second fluid from a second inlet to a second outlet. The first and second hydraulic diameters are equivalent. The third hydraulic diameter is distinct from the first and second hydraulic diameter.

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

Abstract: A 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: 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: 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 is provided in which high heat transfer efficiency has been attained by optimizing the slit array and setting an optimum range for the width of a slit and the spacing between slits. Slits 51 and 52 formed in front of the heat transfer coil 4 and slits 55 and 56 formed behind the heat transfer coil are arranged so as to provide a mutually different length among adjoining partitioned slits in the vertical direction, as well as a mutually different length between directly opposite partitioned slits in the horizontal direction. As a result, the position at which the slit is partitioned is staggered.

Abstract: A fin for use on a heat exchanger and a method for making the same. The fin is made by stamping individual columns of openings in the fin such that adjacent columns are equally spaced apart. The outermost column of openings is spaced from a side edge of the fin a distance that is about one-half of the distance between adjacent columns of openings. The uniform spacing allows for the construction of a fin requiring any number of columns of openings to correspond to the tube portion that is used to form the heat exchanger. This spacing provides for an efficient and compact design of the tube portion and of the heat exchanger formed with the tube portion and the fins.

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: 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: An end plate for heat exchangers, includes a plurality of bodies and a connecting part. Each of the plurality of bodies has a plurality of holes to allow a refrigerant pipe to pass through the plurality of bodies. The connecting part connects the plurality of bodies to each other, with a recess being provided on the connecting part to allow the connecting part to be easily bent. A manufacturing method includes preparing a plurality of fins arranged to provide two or more parallel rows of fin arrays, preparing an end plate provided on a side of the fin arrays to connect the fin arrays to each other, inserting a refrigerant pipe into the fin arrays and the end plate to provide an assembly including the refrigerant pipe, the fin arrays, and the end plate, and bending the assembly at a predetermined angle around the connecting part of the end plate.

Abstract: A universal fin for use on a heat exchanger having a known number of vertical and horizontal tube passes. The universal fin has a plurality of openings arranged in equally spaced columns and equally spaced rows. One or more continuous fins having columns and rows of openings equal to the known number of tube passes can be removed from the universal fin and assembled with a tube portion to form the heat exchanger. The openings on the universal fin are configured so that one or more fins can be separated from the universal fin for use on a heat exchanger regardless of the number of horizontal and vertical passes that comprise the heat exchanger.

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: 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: 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: 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).