With Means Spacing Fins On Structure Patents (Class 165/182)
  • Patent number: 5611395
    Abstract: A fin for a heat exchanger is disclosed including tubes through which thermal fluid flows; first and second rectangular slits disposed in the fin sequentially from a central line connecting the centers of the tubes, both ends of the slits being in parallel with an air incoming direction; and a third slit having a predetermined plane angle at its outer end adjacent to the tubes in order to reduce vortex flow produced at the rear of the tubes.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: March 18, 1997
    Assignee: LG Electronics Inc.
    Inventors: Jong K. Kang, Sang H. Jeong, Kam K. Lee, Tae W. Kang, Jeom Y. Yun
  • Patent number: 5582244
    Abstract: The fin for a heat exchanger which consists essentially of a matrix of tubes and of fins disposed transversely to the latter, the fin having pass-through elements to receive tubes which are to be joined mechanically, while a first, preferably liquid medium flows through the tubes and the fin is acted on by a second, preferably gaseous medium. Multiple fins are positioned in their fin pitch by integral spacers, wherein the spacers are in the form of noses stamped out of the pass-through elements and distributed over the periphery of the latter.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: December 10, 1996
    Assignee: Behr GmbH & Co.
    Inventors: Werner Helms, Roland Hemminger
  • Patent number: 5540899
    Abstract: A reactor arrangement and process for indirectly contacting a reactant stream with a heat exchange stream uses multiple passes of the heat exchange stream in a transverse flow arrangement to control temperature conditions over the width and length of channels through which the reactant passes. The heat transfer coefficient may be varied by changing the number and/or the arrangement of the corrugations along the plates or adding a heat adjustment plate to a channel containing the heat exchange fluid. The reactor arrangement and process of this invention may be used to operate a reactor under isothermal or other controlled temperature conditions. The variation in corrugation arrangements within a single heat exchange section is highly useful in maintaining a desired temperature profile in an arrangement having a cross-flow of heat exchange medium relative to reactants. The corrugations arrangement eliminates or minimizes the typical step-wise approach to isothermal conditions.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: July 30, 1996
    Assignee: UOP
    Inventor: William J. Koves
  • Patent number: 5509469
    Abstract: The present invention involves a flat fin heat exchanger configuration with a plurality of louvers and a rib raised above the plane of the fin connecting adjacent tube collars. The raised rib configuration enhances the heat transfer characteristics of the fin, and allows for the use of thinner materials to lower cost without diminishing performance. The exterior fin surface "scoops" and redirects air flow from the leading edge to the trailing edge of the fin. This "scooping" 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 contributing to a higher heat transfer coefficient. Also, the location of the raised rib also enhances the heat transfer between the fin and the circulated air.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: April 23, 1996
    Assignee: Inter-City Products Corporation (USA)
    Inventor: Charles B. Obosu
  • Patent number: 5501270
    Abstract: A fin for use in a heat exchanger of the type comprising a plurality of fluid carrying tubes for transporting heat exchange fluid is disclosed. The fin includes a generally planar base 24 having a longitudinal axis generally perpendicular to the direction of air flowing entering the heat exchanger 10 and a transverse axis generally parallel to the direction of air flow. The axes define a main plane disposed at a predetermined angle (.theta.) relative to the direction of air flow entering the heat exchanger. The fin 22 further includes a plurality of apertures 30 for receiving tubes 20 therethrough and a plurality of louvres 32 disposed on the base 24 extending generally parallel to the longitudinal axis of the base. The angle .theta. can be between 140 and 175 degrees to the direction of air flow entering the heat exchanger.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: March 26, 1996
    Assignee: Ford Motor Company
    Inventors: Darryl L. Young, Barry W. Blumel
  • Patent number: 5467816
    Abstract: A low cost, extended surface, finned-tube of rectangular cross-section is disclosed for use in single-row bundles of the type used in power plant air-cooled steam condensers. The steel U-shaped fins are metallurgically bonded to the steel tubes by hot-dip galvanizing; aluminum fins would be brazed on. The bottom section of the tubes that flow the condensate have a built-in freeze protection feature.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: November 21, 1995
    Inventor: Michael W. Larinoff
  • Patent number: 5425414
    Abstract: A coil assembly for use in a heat exchanger having air flowing in a predetermined direction. The coil assembly comprises a plurality of parallel linear tubes, a plurality of return tubes interconnecting the linear tubes, and a plurality of fins. Each linear tube has a central portion with an elliptical cross-section and two end portions with round female sockets having circular cross-sections. Each return tube has two end portions with circular cross-sections. Each end portion of a return tube fits into a round female socket of a linear tube regardless of the orientation of the major axes of the linear tubes. The major axis of the elliptical cross-section resides at an oblique angle with respect to the direction of air flow. Each fin comprises a planar sheet of a heat-conductive material with a plurality of holes. The central portion of a linear tube extends through each hole. Each fin securely contacts each linear tube extending therethrough such that heat transfer therebetween is enhanced.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: June 20, 1995
    Assignee: Evapco International, Inc.
    Inventors: Wilson E. Bradley, Jr., Richard P. Merrill, George R. Shriver, Robert S. Weinreich
  • Patent number: 5406937
    Abstract: A fin type radiating system is presented having an exposed rear flange for ease in installing, while improving efficiency. The resulting system is environmentally sound and durable.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: April 18, 1995
    Inventors: Salvatore R. Uglietto, Peter J. Uglietto
  • Patent number: 5353866
    Abstract: Louver segments of a heat transfer fin each have a longitudinal central portion disposed at the center of the louver segment in a direction crossing the flow of a fluid and longitudinal end portions each disposed on either side of the longitudinal central portion and sectioned into parts. Each louver segment has a configuration such that an area of the longitudinal central portion projected in the direction of the flow of the fluid is larger than an area of each of the longitudinal end portions projected in the direction of the flow of the fluid, with respect to the same width of the passage of the fluid.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: October 11, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Hironobu Ueda, Toshio Hatada, Yoshifumi Kunugi, Tomihisa Oouchi, Sigeo Sugimoto, Tamio Shimizu, Kyoji Kohno
  • Patent number: 5325266
    Abstract: Cooling device of a magnetron for a microwave oven, which includes a plurality of radiation fins disposed between an outer periphery of an anode cylinder and an inner surface of a yoke serving as a frame for radiating heat of a high temperature produced during osicillating operation of the magnetron for generating an electromagnetic wave. The temperature of the fins disposed centrally in substantially the same as the temperature of the fins disposed at both ends of the anode cylinder. This is accomplished by, the fins disposed centrally on the outer peripherey being arranged at a diffeent distance from the distance between the fins disposed on both ends of the anode cylinder or by the fins disposed centrally being made of different materials from the materials of the end.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: June 28, 1994
    Inventor: Jong H. Lim
  • Patent number: 5320071
    Abstract: A device for indirectly heating fluids, particularly for high temperature processes, includes a heating space in which at least one tube coil is arranged. The tube coil is constructed in a planar manner and the fluid to be heated can be conducted through the tube coil. Heat radiators act from the outside on the tube coil. The heat radiators have a heat radiation surface shaped corresponding to the planar extension of the tube coil. The heat radiators are arranged on opposite sides of the tube coil. Longitudinal ribs are provided on two opposite sides of the tube of the tube coil with respect to the tube cross section.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: June 14, 1994
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Quintiliano Valenti, Francesco Giacobbe, Raffaele Villante, Maurizio Bezzeccheri
  • Patent number: 5318112
    Abstract: A finned heat exchanger for increased heat transfer from liquid to air, includes of a plurality of stacked thin plates of conductive metal sheeting which are provided with stamped and drawn, slightly conical collars of elliptical, oval or other oblong cross section. The plates are stacked and assembled with the collars of each sheet forcefully pushed into the collars of the adjoining plate, thus effecting tightly closed ducts for the passage of the liquid. The thus-created ducts are arranged in rows and columns, wherein the long axes of the oblong cross section are inclined towards the center line of each column at an angle of 12.degree.-16.degree. to the left and to the right in alternate columns, and wherein the ducts in the rows are staggered in the direction of air flow, every second duct being disposed in forward direction by about half the length of the long axis of its cross section.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: June 7, 1994
    Assignee: Raditech Ltd.
    Inventor: Stanislav Gopin
  • Patent number: 5309982
    Abstract: A heat exchanger apparatus for more effective use of a heat or hot water pipe as a radiant heat source. A pair of tubular members having a semi-circular lateral cross-section and outwardly extending fins attach to the outside surface of a pipe. The tubular members are held adjacent to the pipe by a spring clamp.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: May 10, 1994
    Inventor: Sal Aliano
  • Patent number: 5236045
    Abstract: A heat exchanger tube having fin elements angled in an acute manner from a lateral axis of the flow tube to promote the deflection of debris. The heat exchanger may have a deflector element positioned between the fin elements to prevent the collection of debris between the fin elements.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: August 17, 1993
    Assignee: L & M Radiator, Inc.
    Inventors: Robert J. Janezich, Todd G. Dosen, Charles E. Cedar
  • Patent number: 5225161
    Abstract: A device including an integrally formed membrane oxygenator and heat exchange device positioned in a single housing. The device includes a thermally conductive body formed with a plurality of blood pathways on its surface, and a gas permeable membrane, or membranes positioned in the housing in substantial contact with the heat exchange body to cover or lie within a portion of each of the pathways. The membrane defines a gas pathway separate from the blood pathway through which a gas is directed. The blood is directed through the individual blood pathways. The device also includes various ports and passageways for delivering the blood to the individual channels, and for collecting and removing the blood from the device.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: July 6, 1993
    Assignee: Baxter International Inc.
    Inventors: Wilfred F. Mathewson, Richard L. Bringham, Philip L. Ritger, David L. Karshmer
  • Patent number: 5222550
    Abstract: A plate fin heat exchanger is made such that the distance between the trailing edge of its plate fins and the nearest row of tube openings is substantially greater than the distance between the leading edge and its tube openings, thereby reducing the occurrence of condensate carry-over into the airflow stream.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: June 29, 1993
    Assignee: Carrier Corporation
    Inventors: Charles K. Griffin, Michael P. McCabe
  • Patent number: 5207270
    Abstract: The fin-tube heat exchanger includes a group of fins arranged parallel to one another at predetermined intervals; cylindrical fin collars formed on each fin at a predetermined column pitch and a predetermined row pitch; and heat transfer tubes extending through the respective fin collars and secured thereto in intimate contact therewith. Seat portions are formed on each fin around the fin collars. A curved protuberance of a generally angular cross-section is formed on the fin adjacent to an outer periphery of each of the seat portions, which has a ridge line of an arcuate or circular shape arranged in concentric relation to the associated fin collar. A plurality of straight protuberances of a generally angular cross-section are formed on each fin adjacent to outer peripheries of the respective seat portions between any two adjacent rows of the fin collars. With this structure, heat transfer performance is improved by a turbulence promoting effect of the straight protuberances.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: May 4, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shoichi Yokoyama, Hitoshi Motegi, Osamu Aoyagi, Toshiaki Andoh
  • Patent number: 5203403
    Abstract: A plate fin heat exchanger has a group of fins arranged at predetermined intervals so that an air current flows between the respective fins and a group of tubes respectively inserted into and joined to the cylindrical fin collars which are formed in the fin group with a predetermined longitudinal pitch and lateral pitch. Elliptical seats each having a longitudinally extending short axis are respectively provided around the fin collars on the surface of each of the fins, and seat-side ridge portions are respectively formed along the outer peripheries of the seats. A plurality of fin-side ridge portions, each having a longitudinally linearly extending ridge and substantially the same height as that of each of the seat-side ridge portions, are formed in each line of the fin collars outside the seat-side ridge portions on each of the fins. The turbulence promoting effect of the fin-side ridge portions, each having a longitudinally linearly extending ridge, improves the heat transfer efficiency.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: April 20, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shoichi Yokoyama, Hitoshi Motegi, Toshiaki Andoh
  • Patent number: 5201367
    Abstract: A stack comprises plates (1,2,3,4) having a zig-zag profile and defining diverging-converging passages in the flow direction (L) of the first heat-exchange medium. Each plate (1,2,3,4) has in the direction (M) perpendicular to the flow direction (M) of the first medium several rows (10) of equally spaced openings (11) accommodating tubes (11a) for a flow of the second heat-exchange medium. Each plate (1,2,3,4) has an odd number of portions (12,13) whose zig-zag profile is offset with respect to the zig-zag profile of the adjoining portion by one half of the pitch (t) of the zig-zag pattern of the profile. The rotary die set for producing the plates of this stack comprises two die rolls (19,20). The length of the evolution of the shaping surface (21,22) of each roll (19,20) is divided into an even number of portions of the same length. The zig-zag profile of each portion is offset with respect to the zig-zag profiles of the adjoining portions through one half of the pitch of the zig-zag pattern of the profile.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: April 13, 1993
    Inventors: Evgeny V. Dubrovsky, Alexandr A. Kopylov, Vladimir P. Nagornov, Leonid A. Averkiev
  • Patent number: 5170842
    Abstract: A fin-tube type heat exchanger includes a large number of plate fins arranged in parallel to each other at predetermined intervals for allowing an air stream to flow between them, and heat exchanging tubes having an outer diameter Do and extending through the plate fins in a direction at right angles thereto. The heat exchanging tubes are set in rows spaced apart by a pitch L.sub.1 in a direction parallel to an air stream as represented by1.2 Do .ltoreq.L.sub.1 .ltoreq.1.8 Do,and are spaced in each of the rows by a pitch L.sub.2 in a direction perpendicular to the air stream as represented by2.6 Do .ltoreq.L.sub.2 .ltoreq.3.3 Do.Each of the plate fins is formed, between the heat exchanging tubes, with a plurality of cut and raised portions open to the air stream and protruding alternately is opposite directions from a base plate of the plate fin.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: December 15, 1992
    Assignee: Matsushita Refrigeration Company
    Inventors: Kaoru Kato, Hachiro Koma
  • Patent number: 5159975
    Abstract: A unit to enhance heat transferring through a tube in a condenser-type heat exchanger comprises a series of elements. The elements engage a surface of the tube in contact with a high temperature condensable medium flowing through the exchanger. The elements are spaced apart, positioned parallel and have ring-like configurations. The elements are positioned on an angle so that when the unit is secured to a vertical tube, each element has a low point. These low points align and connect with a vertical riser. In use the tube is one of a set forming a tube bundle fitted into a vessel of the heat exchanger. As heat transfers from the high temperature medium, for example steam flowing through the vessel to a lower temperature medium, for example cooling water flowing through the tubes, the steam condenses on the tube. The condensed steam builds into a thickening film that then flows down the tube. This downward condensate flow is diverted by the elements of the unit and runs to the low point of each element.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: November 3, 1992
    Inventor: Guy R. Murphy
  • Patent number: 5120501
    Abstract: A device including an integrally formed membrane oxygenator and heat exchange device positioned in a single housing. The device includes a thermally conductive body formed with a plurality of blood pathways on its surface, and a gas permeable membrane, or membranes positioned in the housing in substantial contact with the heat exchange body to cover or lie within a portion of each of the pathways. The membrane defines a gas pathway separate from the blood pathway through which a gas is directed. The blood is directed through the individual blood pathways. The device also includes various ports and passageways for delivering the blood to the individual channels, and for collecting and removing the blood from the device.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: June 9, 1992
    Assignee: Baxter International Inc.
    Inventors: Wifred F. Mathewson, Richard L. Bringham, Philip L. Ritger, David Karshmer
  • Patent number: 5117905
    Abstract: In order to be able to use materials of higher strength without the danger of cracks arising during deformation, it is proposed, with reference to a heat exchanger having lamella fins, which are held at a distance from and parallel to each other by shaped collars on the lamella fins and which are penetrated by pipes running parallel to each other in passages through the collars, the internal diameter of the passage in each case matching the external diameter of the pipe and at least partially contacting the external periphery of the pipe, while at the same time exactly preserving the distances between the lamella fins, that tongues are distributed on the periphery of the punched rim of the passage, the free ends of the tongues are bent at an angle to the pipe projecting through the passage, and that these bent tongues provide space locating surfaces for the adjacent parallel lamella fin. Also disclosed is a heat exchanger assembly.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: June 2, 1992
    Assignee: Sueddeutsche Kuehlerfabrik Julius Fr. Behr GmbH & Co. KG
    Inventor: Wolfgang Hesse
  • Patent number: 5109919
    Abstract: A fin-and-tube heat exchanger comprises a fin plate, a heat exchanger tube having portions extending through the fin plate, a plurality of fin collars formed in the plate, wherein louvers are provided so as to surround the tube portions except areas nearest to the collars, the louvers are in parallel with one another and project from alternately both surfaces of the plate, the louver which is located at the trailing edge side and at a position near to a central line of the tube bank is longitudinally extended so as to be along the collars and has opposite rising ends extending from the plate slanted toward the corresponding tube portions at an angle of 35 deg or below to the flow direction of the fluid, and the louver which is located at a position nearer to the trailing edge is also longitudinally extended and has opposite rising ends extending from the plate slanted toward the corresponding tube portions at an angle of 35 deg or above to the flow direction of the fluid so that the angle between the rising e
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: May 5, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kiyoshi Sakuma, Takayuki Yoshida, Tomohumi Tezuka, Katsuyuki Aoki, Makoto Yamada, Masao Hujii, Ken Morinushi
  • Patent number: 5092397
    Abstract: A heat conducting fin for a heat exchanger is provided with an array of deep drawn collars defining passages with flattened, oval cross-sections for receiving heat exchanging pipes of a corresponding cross-section. In order to prevent the formation of cracks in the collars particularly when a large ratio of the maximum diameter to the minimum diameter of the oval collar involves very small radii of curvatures, the height of the collar in the region of its small radius of curvature is less than in the region of its large radius of curvature. The invention also relates to a heat exchanger including a stack of such fins and a series of heat exchanging pipes passing through the passages in the collars and being attached to the inner walls of the collars by expanding corresponding pipe portions.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: March 3, 1992
    Assignee: Autokuhler GmbH & Co KG
    Inventors: Ernst Fuhrmann, Richard Scholze
  • Patent number: 5042576
    Abstract: A finned tube heat exchanger having an improved flat louver fin configuration for increased heat transfer efficiency and low air pressure drop. The fins comprise generally planar sheet metal plates having a pattern of spaced apertures for receiving a group of heat exchanger tubes perpendicularly to the fin plate. Groups of louvers are formed as elongate strips extending generally in an area between adjacent tubes. The strips are selectively offset, i.e. raised or lowered from the nominal plane of the fin, so as to establish a louver pattern having flat louvers in a number of different planes each parallel to the direction of flow of air across the fin. Stiffness is provided for the fin plate by providing a slope and offset of the leading and trailing edges of the fin plate such that they are displaced in a direction parallel to the axes of the tube.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: August 27, 1991
    Assignee: Heatcraft Inc.
    Inventor: John A. Broadbent
  • Patent number: 4997036
    Abstract: Essentially triangular turbulators 3 extending at an angle .alpha. to the tube longitudinal plane RLE running through the tube axis RA as well as parallel to the fluid flow direction FSR are arranged on the flat lateral ribs 2 of a heat exchanger tube 1. The turbulators 3 are stamped out of the rib plane and are then bent off at an angle of approximately 90.degree.. They have flash or parting lines 4 rising in the fluid flow direction FSR as well as in the direction of the heat exchanger tube 1. This allows generation of longitudinal vortices 5 downstream of the turbulators 3 which roll over the boundary layers in this location and improve the heat transfer.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: March 5, 1991
    Assignee: GEA Luftkuhlergesellschaft Happel GmbH & Co.
    Inventors: Heinrich Schulze, Paul Paikert
  • Patent number: 4960170
    Abstract: In a finned tube product of the type having a flat thin fin wound helically on a heat exchange tube, wherein the fin is made from a material having a relatively higher coefficient of thermal expansion than the material of the tube, the improvement which comprises winding a wire helically on the surface of the tube in side by side relation with the fin and simultaneously with the winding of the fin on the surface of the tube such that each winding of wire is snuggly received between adjacent windings of fin, the wire being made of a material having essentially the same or smaller coefficient of thermal expansion as compared to the material of the tube and the longitudinal dimension of thickness of wire representing the desired spacing between adjacent windings of fin on the tube.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: October 2, 1990
    Inventor: James I. Carter
  • Patent number: 4928756
    Abstract: A compressible heat-dissipating fin, a compressed heat-dissipating fin assembly, and a method for making a fin assembly for cooling an electromechanical device such as a transverse-flow forced air-cooled ion gas laser are disclosed. Each fin preferably has a slit running through its center except for a small hinge. The slit provides the fin with compressibility and increased contact pressure when the fin is fitted directly to and compressed against the tube, preferably by clamping, during the brazing cycle.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: May 29, 1990
    Assignee: Spectra-Physics
    Inventors: William Shull, Rudolph Nissen, Alexander Drobshoff
  • Patent number: 4923002
    Abstract: A rib or fin for the joint ribbing of a plurality of heat exchanger tubes in a ribbed-tube heat exchanger for motor vehicles in which the ambient air flows as a first heat exchange fluid along the surface of the rib or fin and a second heat exchange fluid is conducted in the heat exchanger tubes. The rib is corrugated in the direction of flow of the first fluid. The rib is provided with shaped-on connecting sleeves which serve as a connection to the heat exchanger tubes. At least one wave crest of the corrugation extends between two connecting sleeves that are adjacent one another transversely to the flow direction of the first fluid, and local air guidance profiles are shaped in the corrugated surface of the rib in the spaces between the connecting sleeves. The air guidance profiles are constituted by at least predominantly closed bulges which have a lower height than the distance between the ribs when assembled in the heat exchanger and the bulges are each disposed on a slope of the corrugation.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: May 8, 1990
    Assignee: Thermal-Werke, Warme-Kalte-Klimatechnik GmbH
    Inventor: Roland Haussmann
  • Patent number: 4860822
    Abstract: A sine-wave like plate fin for a finned tube heat exchanger coil is provided having an improved enhanced heat transfer area between adjacent pairs of holes in the plate fin. The enhanced heat transfer area includes a plurality of raised lance elements disposed thereon generally at the peaks and troughs of the sine-wave wherein the raised elements at the peaks are concave and the raise elements at the troughs are convex.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: August 29, 1989
    Assignee: Carrier Corporation
    Inventor: Paul S. Sacks
  • Patent number: 4832117
    Abstract: A fin tube heat exchanger is internally provided with a plurality of plate-shaped and regularly spaced fin members, a plurality of heat exchanger tubes inserted into through-holes defined in each fin member and a plurality of raised pieces formed in each fin member in a plurality of rows. The raised pieces in the same row are raised from a fin base in a direction opposite to the direction in which the raised pieces in adjacent rows are raised. The number of the raised pieces in each row is gradually increased as their row is located farther from a common center line of the through-holes. The raised pieces are integrally formed with and raised from the fin base between adjacent heat exchanger tubes so that two slits defined between the fin base and each raised piece may be open against the air flow.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: May 23, 1989
    Assignee: Matsushita Refrigeration Company
    Inventors: Kaoru Kato, Hachiro Koma, Masashi Kawai
  • Patent number: 4830102
    Abstract: A heat exchanger having a plurality of parallel pipes arranged in lines and strips of fin plates fixed to the pipes perpendicularly to the lengths thereof. Turbulence-forming structures are cut out of the fin plates and are bent up at 90.degree. with respect to the planes of the plates, such structures functioning as fin plate spacers and as baffles to direct a fluid medium of inferior heat transfer coefficient which flows in a direction parallel to the planes of the finned plates and perpendicularly to the pipes. The pipes are adapted to conduct a fluid medium of superior heat transfer coefficient. The turbulence-forming structures are disposed in lines on each side of the lines of pipes and in rows which are substantially tangential to the opposite sides of the pipes. The heat exchanger may have a plurality of lines of pipes spaced equally transversely from each other and transvetsely of the direction of flow of the fluid medium of inferior heat transfer coefficient.
    Type: Grant
    Filed: July 2, 1987
    Date of Patent: May 16, 1989
    Assignee: Kulkereskedelmi Transelektro Magyar Villamossagi Vallalat
    Inventors: Arpad Bakay, Janos Boda, Laszlo Forgo, Istvan Papp, Gyula Kovacs, Karoly Laszlo
  • Patent number: 4825813
    Abstract: A multi-pipe once-through boiler having at least one row of a plurality of circumferentially arranged pipes on which a plurality of fins are arranged in such a manner that the fins are in contact with the flow of the combustion gas in a substantially parallel maner. Elements are provided for increasing the heat transfer effect, such as slits in the fins, or an inclined arrangement of the fins, or pipes without fins at the region near to the inlet of the combustion gas passageway, are provided. Furthermore, a heat insulating member for decreasing operational noise as well as a cleaner device for blow-cleaning the combustion gas passageway are provided.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: May 2, 1989
    Assignee: Miura Co., Ltd.
    Inventors: Yuji Yoshinari, Hitoshi Shiraishi, Osamu Tanaka, Akiyoshi Kawahito, Toshihiro Kayahara, Satoru Takeda, Takashi Yamada, Akinori Kawakami
  • Patent number: 4817709
    Abstract: A sine-wave like plate fin for a finned tube heat exchanger coil is provided having an improved enhanced heat transfer area between adjacent pairs of holes in the plate fin. The enhanced heat transfer area includes a plurality of rows of triangular ramp wings which generate counter rotating vortices to promote restarting or thinning of the hydrodynamic boundary layer.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: April 4, 1989
    Assignee: Carrier Corporation
    Inventor: Jack L. Esformes
  • Patent number: 4789027
    Abstract: The heat exchanger is formed of parallel rows of tubes and transverse ribs. The ribs have flat uncorrugated parts extending in zones about and along the rows of tubes as well as corrugated parts extending between the rows of tubes. The flat parts may be separated from the corrugated parts by stepped parts or fillers may be provided in the gaps between the uncorrugated parts. The gaps are to conduct a flow of medium in heat exchange relation to a flow of medium through the tubes. The crests and troughs of each corrugated part extend from the same plane adjacent a flat part and terminate in a similar plane at an adjacent flat part. Streamline-shaped inflow and outflow members aligned with the stepped part of the fin direct the flow of air.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: December 6, 1988
    Assignee: Sulzer Brothers Limited
    Inventor: Roland Diethelm
  • Patent number: 4775007
    Abstract: A heat exchanger comprises a plurality of regularly corrugated fins placed one over another in layers at regular pitches in a back-to-back arrangement so as to form alternate wide and narrow fluid passage between the adjacent corrugated fins, and each having a plurality of small through holes, a plurality of collars formed in a staggered arrangement, and an annular area not having any small through hole and formed so as to surround the root of each collar; and pipes for passing a secondary fluid therethrough, each inserted through the collars of the layers of the corrugated fins. The height of the collar from the lower surface of the annular area corresponds to the pitch between the adjacent corrugated fins, and thereby the corrugated fins can be assembled at regular pitches simply by placing one over another. The pipes are expanded after being inserted through the collars so that the pipes are firmly and closely joined to the collars for satisfactory heat transmission between the fins and the pipes.
    Type: Grant
    Filed: July 7, 1987
    Date of Patent: October 4, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kiyoshi Sakuma, Yoshiaki Tanimura, Hiroyuki Umemura, Makoto Yamada, Yu Seshimo, Masao Fujii, Ikuo Tsukamoto
  • Patent number: 4753833
    Abstract: A tubular article with circumferential projections having radial or chordal corrugations. The chords have tooth-like formations or are parallel and directed vertically in underground installation. In the last case, the sides of the tube can be devoid of the corrugations, or have them radially or tooth-like. Furthermore, the projections can be skewed and alternating in the opposite directions. Also, the projections can have offset planes. Finally, in case of two corrugations, they are diametrically opposed in a single chordal direction and are represented by rings bent parallel to the applicable load which is adverse with thus prestressed projections.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: June 28, 1988
    Inventors: Semyon I. Fishgal, Aleksander S. Fishgal, Irina G. Pass-Fishgal
  • Patent number: 4738225
    Abstract: A plurality of rows of circular openings for supporting water tube sections and turbulence fin arrays comprising plural vertically arrayed fin slots for guiding combustion gas to flow upwards at an angle therethrough are provided on each of a plurality of fin plates which are arrayed in parallel and disposed at the upper end of a water heater. The circular openings and the turbulence fin arrays of each row are alternately positioned. Therefore, each circular opening of a lower row is located below either of the turbulence fin arrays of a next higher row and each turbulence fin array of a lower row is located below either of said circular openings of a next higher row.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: April 19, 1988
    Inventor: Jinn C. Juang
  • Patent number: 4721068
    Abstract: A gas-fired boiler plant comprises a burner bed (10) extending over a flat surface and heat exchanger pipes (61, 62) arranged above the burner bed (10), parallel to the said surface. The heat exchanger tubes (61, 62) comprise pipes (63, 64) equipped with a plurality of flat ribs (65, 65a . . . , 66, 66a . . . ) which extend substantially radially from the said pipes and which are provided in spaced arrangement over the length of the said heat exchanger pipes (61, 62). The ribs are provided with bent-off portions (70, 71, 72, 73, 74, 75). The hot flue gases (82) rising from the burner bed (10) flow through the gaps (84, 84a) formed between the said ribs (65, 65a . . . , 66, 66a . . . ) and pipes (63, 65).
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: January 26, 1988
    Assignee: Rendamax AG
    Inventors: Juan Bassols Rheinfelder, Norbert Bednarek, Jacob J. Marijnen
  • Patent number: 4709753
    Abstract: A fin-and-tube heat exchanger designed for one-way airflow, in which louvers, formed from the fin stock, progressively increase in length from the fin leading edge to its trailing edge. Their end walls channel air into stagnant air spaces behind the tubes. The tube collars may be offset somewhat toward the fin trailing edge, further reducing the stagnant air zones. In those bent heat exchangers in which air flows in from outside the curve, offsetting the collars also lessens the angular convergence of fin trailing edges inside the curve and presents less resistance to airflow.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: December 1, 1987
    Assignee: Nordyne, Inc.
    Inventor: Allan J. Reifel
  • Patent number: 4651820
    Abstract: A heat exchanger of the type having a tube assembly made up of a number of tubes through which a first medium flows and around and between which a second medium flows to accept heat from, or transfer heat to, the first medium. One of the media is constrained by baffles to follow a tortuous path through the heat exchanger. According to the invention, the baffles are completely separate from the tubes, so permitting them to be replaced or adjusted without the necessity of disassembling the tube assembly. The baffles can be carried releasably on rods which allow their spacing to be adjusted at will, with the result that heat exchangers according to the invention are more versatile than conventional heat exchangers where the baffles are fixed to the tubes.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: March 24, 1987
    Inventor: Herfried Knapp
  • Patent number: 4638854
    Abstract: Means for accurately controlling the transfer of heat to or from a device includes a heat pipe having a condenser end and an evaporator end. A helical screw thread is provided on the exterior surface of the heat pipe so that a portion of the heat pipe may be removably insertable via the threading into a threaded aperture in a desired section of the device. Alternatively, a connecting member, in which a portion of the heat pipe is fixed, may be selectively secured to the desired section of the device. At least one heat sink fin which is selectively securable on the heat pipe via the threading may also be provided.
    Type: Grant
    Filed: June 15, 1983
    Date of Patent: January 27, 1987
    Inventor: Don W. Noren
  • Patent number: 4599867
    Abstract: The purpose of this invention is to store hydrogen in the form of a metal hydride. The hydride is disposed on the surface of a plurality of metal fins which are attached to heat transfer tubes. The fins are closely spaced so that the weight of hydrogen stored per unit volume is high, approaching one pound per cubic foot. Because the formation of a metal hydride is quite exothermic, the rate of addition or removal of hydrogen to or from the hydride is limited by the ability of the apparatus to conduct heat to or from the hydride. The structure of the present invention provides for rapid heat transfer, so that the cell can be used in a heat pump, a hydrogen compressor, or to store hydrogen fuel for a vehicle. The invention includes embodiments wherein the heat transfer medium is either a liquid or a gas. The invention also comprises a new method of applying a metal or metal alloy, capable of forming a metal hydride, to a metal surface.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: July 15, 1986
    Inventor: William B. Retallick
  • Patent number: 4586563
    Abstract: A tube-and-plate heat exchanger comprising a plurality of plain tubes intended for a first heat carrier to pass through, which tubes are arranged in parallel rows and are received in broached holes of spaced plates. In cross section the plates are profiled so as to form, in the direction of flow of another, for example, a gaseous heat carrier, a continous symmetrically waved line, thereby forming a passage of undulatory shape for the gaseous heat carrier to flow through. Projections and depressions of each plate face corresponding projections and depressions of the other adjacent plate, thereby forming passages with alternating diverging-converging sections. The projections and the depressions of the cooled plates are made contiguous by rectilinear sections which each have an angle (.phi.) of inclination to the axis of symmetry of the cross-sectional wave line ranging from 8 to 45 deg.
    Type: Grant
    Filed: February 3, 1981
    Date of Patent: May 6, 1986
    Inventors: Evgeny V. Dubrovsky, Leonid A. Averkiev, Natalya I. Martynova
  • Patent number: 4580623
    Abstract: An evaporator for refrigeration devices comprises a serpentine tube bundle having a plurality of spaced-apart parallel fins. The tube bundle is arranged to provide sets of tubes in a staggered arrangement to increase the number of tube passes for the height of the evaporator and space the tubes apart to improve efficiency of air flow patterns over the tubes to enhance heat transfer. The fins are made of ultra-thin material of a thickness less than 0.20 millimeters. The fins have an embossed pattern to reinforce the fins through which the tubes extend in appropriately shaped apertures. Due to the thinness of the fins, portions of the fin walls are displaced by inserting the tubes in the apertures to ensure metal to metal contact between the fin and the tubes. The embossed pattern is such to induce turbulence in the air flowing over the fins and tubes to considerably increase the efficiency of the evaporator unit.
    Type: Grant
    Filed: October 2, 1984
    Date of Patent: April 8, 1986
    Assignee: Inglis Limited
    Inventors: Cory T. Smitte, Rico D. Ferrelli
  • Patent number: 4558695
    Abstract: A heat exchanger such as a radiator for an automotive engine is produced by fixing lengths of flattened tubes and corrugated fins to each other by brazing within a furnace. The flattened tube is formed by bending a strip and welding the opposing edges of the bent strip to each other to form a tube of a substantially circular cross-section, and applying pressure to the tube along the weld line to form the flattened tube while depressing the tube wall along the weld line to form an elongated recess or groove along the weld line. Then, a brazing material is applied to the outer surfaces of the flattened tube to cover and fill up any minute weld defects which may exist in the flattened tube whereby the weld defects are repaired.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: December 17, 1985
    Assignee: Nippondenso Co., Ltd.
    Inventors: Takahiro Kumazawa, Yoshihiro Nakamura, Toshihisa Izawa
  • Patent number: 4514900
    Abstract: The present invention comprises an improved heat exchanger finned tube and method and apparatus for producing elongated segments of the finned tube comprising knurling the outside surface of a central tube of heat conductive material, forming strip stock material into a continuous fin and spirally winding the fin about the outer knurled surface of the central tube. The fin comprises a foot portion to form a substantially L-shaped cross-section, the foot portion being in contact with the central tube and having a heel portion slightly overlapping a toe portion of the next succeeding fin wrap. A second knurling operation over the outer surface of the foot of the fin forces the foot portion to be deformed into the knurling present on the outer surface of the central tube and interlocking with the next succeeding fin wrap.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: May 7, 1985
    Assignee: Con Rad Industries, Inc.
    Inventor: Jacques A. V. Benard
  • Patent number: 4488593
    Abstract: A fin element for a heat exchanger has alternate fins A and B in parallel planes in a longitudinal central zone 10. Edge zones 12 are bent at obtuse included angles with respect to the parallel planes. The fin element is formed from a metallic strip of material by pressing the fins A and B in opposite directions and allowing the overall width of the strip to reduce so that the finished element has a constant thickness.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: December 18, 1984
    Assignee: D. Mulock-Bentley and Associates (Proprietary) Limited
    Inventor: Desmond Mulock-Bentley
  • Patent number: 4465128
    Abstract: A plate floor heat exchanger has a plurality of conductive mutually parallel plates spaced apart by narrow gaps defined by spacer bands which can have a streamlined shape and each of which are traversed by a plurality of tubes extending perpendicular to the plates. The spaces between longitudinal edges of these bands define flow channels for a fluid in a heat exchange relationship with the fluid traversing the tubes.
    Type: Grant
    Filed: April 21, 1981
    Date of Patent: August 14, 1984
    Assignee: Orszagos Koolaj es Gazipari Troszt
    Inventors: Sandor Krekacs, Zoltan Palfi