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US20030188852A1 - Heat exchanging fin and method of manufacturing the same - Google Patents

Heat exchanging fin and method of manufacturing the same Download PDF

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Publication number
US20030188852A1
US20030188852A1 US09/156,394 US15639498A US2003188852A1 US 20030188852 A1 US20030188852 A1 US 20030188852A1 US 15639498 A US15639498 A US 15639498A US 2003188852 A1 US2003188852 A1 US 2003188852A1
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US
United States
Prior art keywords
heat exchanging
sections
exchanging fin
flare
regular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US09/156,394
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English (en)
Inventor
Mamoru Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hidaka Seiki KK
Original Assignee
Hidaka Seiki KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hidaka Seiki KK filed Critical Hidaka Seiki KK
Assigned to HIDAKA SEIKI KABUSHIKI KAISHA reassignment HIDAKA SEIKI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YAMADA, MAMORU
Priority to US09/346,700 priority Critical patent/US6209201B1/en
Priority to JP22081799A priority patent/JP3403126B2/ja
Publication of US20030188852A1 publication Critical patent/US20030188852A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means

Definitions

  • the present invention relates to a heat exchanging fin and a method of manufacturing the heat exchanging fin, more precisely relates to a heat exchanging fin, in which collars are formed to respectively enclose tube holes, through which heat exchanging tubes will be inserted, and the collars respectively have flares at their front ends, and a method of manufacturing the heat exchanging fin.
  • the heat exchanging fin which is employed in room air conditioners, car air conditioners, etc., has: a rectangular metallic plate section, which is made of a metal, e.g., aluminum; and a plurality of collared tube holes being provided in the metallic plate section with separations and having a prescribed height.
  • a heat exchanger is assembled by the steps of: piling the heat exchanging fins, in which the collared tube holes are coaxially arranged; inserting heat exchanging tubes, which are made of a metallic material having high heat conductivity, e.g., copper, through the coaxial tube holes; and expanding the heat exchanging tubes, which have been inserted through the tube holes, so as to integrate the heat exchanging tubes with the heat exchanging fins.
  • the conventional heat exchanging fin is manufactured by the steps by a drawing manner, which is shown in FIGS. 14 I- 14 VI, or a drawless manner, which is shown in FIGS. 15 A- 15 D.
  • a shallow projected section 106 which has a columnar shape or a truncated cone shape, is formed in a thin aluminium plate section 100 (see FIG. 14I). Diameter of the shallow projected section 106 is greater than that of the collared tube holes to be formed. Next, the diameter of the shallow projected section 106 is reduced and height thereof is gradually higher by drawing the shallow projected section 106 (see FIGS. 14 II- 14 IV).
  • a top face of the projected section 109 which is formed by drawing the shallow projected section 106 until reaching a prescribed height, is opened and burred to make a cylindrical section 104 (see FIG. 14V). Further, a flare 105 is formed by bending a top end of the cylindrical section 104 (see FIG. 14V).
  • FIGS. 15 A- 15 D a base hole 101 , which is enclosed by a projected part 102 , is formed by boring and burring the metallic plate section 100 (see FIG. 15A). Then, diameter of the base hole 101 is made greater and the projected part 102 is squeezed until a cylindrical section 104 which has a prescribed height is formed (see FIGS. 15B and 15C).
  • the flare 105 is formed by bending the top end of the cylindrical section 104 (see FIG. 15D).
  • the heat exchanging fins having the collared tube holes which include the cylindrical sections 104 and the flares 105 , are formed by the manner shown in FIGS. 14 I- 14 VI or FIGS. 15 A- 15 D.
  • the flares 105 of one heat exchanging fin contact a bottom face of the adjacent heat exchanging fin, so that the separation between the heat exchanging fins can be defined.
  • the base hole which is bored in the top face of the projected section 109 or in the metallic plate section 100 , is a circular hole.
  • the width of the flare 105 which is formed to enclose an circular edge of the top end of the cylindrical section 104 , is fixed.
  • tough heat exchanging fins are also required. Namely, the heat exchanging fins, which are not only thin but also tough, are required, so the metallic plate section 100 is made of a thin and tough metallic material.
  • Extensibility of the thin and tough metallic material is less than that of a thick and soft metallic material, so it is improper for the thin and tough metallic material to press and form the heat exchanging fins.
  • the flare 105 is formed by bending the top end of the cylindrical section 104 , the flare 105 is outwardly pulled.
  • a crack 106 is apt to be formed in the flare 105 (see FIG. 16) because the end of the flare 105 is extremely extended.
  • 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.
  • Another object of the present invention is to provide a method of manufacturing said heat exchanging fin.
  • the basic structure of the heat exchanging fin of the present invention comprises:
  • 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.
  • a shape of an outer edge of each flare may be formed into a polygonal shape.
  • the polygonal shape may be a triangle, a tetragon, etc.
  • each flare may be provided to locate their apexes with regular separations in the circumferential direction.
  • a shape of an outer edge of each flare may be formed into a regular polygonal shape.
  • the regular polygonal shape may be a regular triangle, a regular tetragon, etc.
  • each flare may include a plurality of narrow sections, which are radially outwardly extended from the front end of each collar and their width is narrower than that of the radially extended sections.
  • the radially extended sections of each flare may be provided with regular separations in the circumferential direction.
  • the basic structure of the method of manufacturing the heat exchanging fin including: a metallic plate section having a plurality of tube holes; a plurality of collars each of which is extended from an edge of each tube hole; a plurality of flares having prescribed height, each flare being formed at a front end of each collar,
  • [0028] comprises the steps of:
  • the cylindrical section having the higher sections and the lower sections may be formed by the steps of:
  • the base hole may be formed into a triangle or a tetragon.
  • the higher sections may be provided at the front end of the cylindrical section with regular separations in the circumferential direction.
  • the base hole is formed into a regular triangle or a regular tetragon.
  • the cylindrical section having the higher sections and the lower sections may be formed by the steps of:
  • the base hole may be formed into a triangle or a tetragon.
  • the higher sections may be provided at the front end of the cylindrical section with regular separations in the circumferential direction.
  • the flare may include a plurality of radially extended sections, which are radially outwardly extended from the front end of the collar, and a plurality of narrow sections, which are radially outwardly extended from the front end thereof and whose width is narrower than that of the radially extended sections, wherein the flare is formed by radially outwardly bending the higher sections of the cylindrical section.
  • a force pulling an outer edge of the flare is greater than a force pulling an inner edge thereof when the flare, which encloses the top end of the collar with fixed width, is formed by bending the top end of the cylindrical section.
  • the top end of the cylindrical section has rough and hard faces, which are formed when the metallic plate section is bored and broken by a die-punch set.
  • the flare of the collar is constituted by a plurality of the radially extended sections, which are arranged at the front end of the collar with separations.
  • the pulling force applied to one of the radially extended sections does not influence other radially extended sections.
  • the greater pulling force capable of pulling the outer edge of the flare can be prevented when the flare is formed at the front end of the cylindrical section by bending, so that forming the cracks in the flare can be prevented.
  • the height of the cylindrical sections must be a prescribed height.
  • the whole edge of the top end of the cylindrical section must have a prescribed height, so the cylindrical section is drawn or squeezed until the whole edge of the top end reaches the prescribed height.
  • the front end of the cylindrical section is uneven, namely the front end has the higher sections and the lower sections. And, the top ends of the higher sections must have a prescribed height. The whole edge of the front end of the cylindrical section need not have the prescribed height, so the heat exchanging fins can be easily manufactured.
  • FIG. 1 is a perspective view of the heat exchanging fin of an embodiment of the present invention
  • FIG. 2 is a plan view of a collared tube hole 14 of the heat exchanging fin shown in FIG. 1;
  • FIG. 3 is a sectional view of the collared tube hole 14 taken along a line A-A shown in FIG. 2;
  • FIGS. 4 A- 4 D are sectional views showing the steps of manufacturing the heat exchanging fin shown in FIG. 1;
  • FIG. 5 is a plan view of a base hole 26 bored in the step shown in FIG. 4B;
  • FIG. 6A- 6 D are sectional views showing the steps of manufacturing the heat exchanging fin shown in FIG. 1;
  • FIG. 7 is a plan view of a base hole 30 bored in the step shown in FIG. 6A;
  • FIG. 8 is a perspective view of the heat exchanging fin of another embodiment
  • FIG. 9 is a plan view of a collared tube hole 41 of the heat exchanging fin shown in FIG. 8;
  • FIG. 10A is a plan view of the base hole 26 bored in the step shown in FIG. 4B;
  • FIG. 10B is a plan view of the base hole 30 bored in the step shown in FIG. 6A;
  • FIG. 11 is a perspective view of the heat exchanging fin of another embodiment
  • FIG. 12 is a plan view of a collared tube hole 52 of the heat exchanging fin shown in FIG. 11;
  • FIG. 13A is a plan view of the base hole 26 bored in the step shown in FIG. 4B;
  • FIG. 13B is a plan view of the base hole 30 bored in the step shown in FIG. 6A;
  • FIGS. 14 I- 14 VI are sectional views showing the steps of manufacturing the conventional heat exchanging fin
  • FIGS. 15 A- 15 D are sectional views showing the steps of manufacturing the conventional heat exchanging fin.
  • FIG. 16 is a perspective view of the collared tube hole, in which the crack is formed in the flare.
  • FIG. 1 is the perspective view of the heat exchanging fin of the embodiment.
  • the heat exchanging fin 10 shown in FIG. 1 includes: a rectangular metallic plate section 12 , which is made of aluminum; and a plurality of collared tube holes 14 , which are linearly arranged in the longitudinal direction of the plate section 12 .
  • Each collared tube hole 14 has a collar 20 , in which an edge of a tube hole 16 is enclosed by a flare 18 .
  • the flare 18 includes: radially extended sections 18 a , which are outwardly extended a front (upper) end of the collar 20 ; and narrow sections 18 b , whose width is narrower than that of the radially extended sections 18 a .
  • the radially extended sections 18 a are provided along an outer circumferential face of the collar 20 with regular separations.
  • the flare 18 is formed into a regular tetragon and its corners are rounded.
  • the shape of the flare 18 is not limited to the regular tetragon, it may be a rectangle and may have angular corners, etc.
  • FIG. 3 A sectional view of the collared tube hole 14 taken along a line A-A of FIG. 2 is shown in FIG. 3.
  • the radially extended sections 18 a have flat sections (upper faces, of the radially extended sections 18 a ).
  • the flat sections of the radially extended sections 18 a contact a bottom face of another heat exchanging fin 10 , which is located on the upper side so as to support said heat exchanging fin.
  • the separation between the metallic plate section 12 and each flat section of the radially extended section 18 a is fixed, so that the radially extended section 18 a can stably support the upper heat exchanging fin 10 , and the adjacent heat exchanging fins 10 can be separated with fixed separations.
  • the narrow sections 18 b have no flat sections, so they do not support another heat exchanging fin 10 .
  • the height of the highest points of the narrow sections 18 b is equal to that of the flat sections of the radially extended sections 18 a . If the height of the narrow sections 18 b is lower than that of the radially extended sections 18 a , an outer circumferential face of the heat exchanging tubes, which are pierced through the tube holes 16 of the piled heat exchanging fins 10 , are exposed. If the tubes are seen between the heat exchanging fins 10 , the external appearance and hear exchangiblity are bad.
  • the narrow sections 18 b are outwardly bent with respect to an inner circumferential face of the tube hole 16 , so that the heat exchanging tube can be smoothly inserted in the tube hole 15 .
  • FIGS. 4 A- 4 D a projected section 22 shown in FIG. 4A can be formed by the steps of FIGS. 14 I- 14 IV, which have been explained in the drawing manner shown in FIGS. 14 I- 14 VI.
  • a base hole 26 is bored in a flat face 24 of the projected section 22 , which has been formed in the step of FIG. 4A (see FIG. 4B). As shown in FIG. 5, area of the base hole 26 is smaller than that of the flat face 24 of the projected section 22 , and the base hole 26 is formed into a regular tetragon whose corners are rounded.
  • the base hole 26 which has been bored in the flat face 24 of the projected section 22 , is burred so as to form a cylindrical section 28 whose front (upper) end is zigzag formed (see FIG. 4C).
  • higher sections 28 a and lower sections 28 b are alternately formed, namely four higher sections 28 a (or four lower sections 28 b ) are arranged in the circurmferential direction with regular separations.
  • the higher sections 28 a correspond to middle parts of linear edges 26 a of the base hole 26 shown in FIG. 5, which has been bored in the flat face of the projected section 22 ; the lower sections 28 b correspond to corners 26 b of the base hole 26 shown in FIG. 5.
  • the zigzag front end of the cylindrical section 28 are pressed, namely four higher sections 28 a are simultaneously pressed to bend outwardly, so that four radially extended sections 18 a , which are radially outwardly extended from the front end of the collar 20 , are formed (see FIG. 4D).
  • the higher sections 28 a are pressed until the flat sections are formed; parts of the lower sections 28 b are pressed to form the narrow sections 18 b , whose width is narrower than that of the radially extended sections 18 a as shown in FIGS. 2 and 3.
  • the separation between the plate section 12 and each narrow sections 18 b is equal to that between the plate section 12 and each radially extended section 18 a.
  • the step of boring the base hole 26 which is formed into the regular tetragon, in the flat face 24 of the projected section 22 (see FIG. 4B) and the step of burring the base hole 26 (see FIG. 4C) may be executed separately.
  • the boring step and the burring step may be executed simultaneously.
  • the steps may be executed in a press machine, in which the steps are executed in a stroke of a movable die.
  • the corners of the tetragonal base hole 26 may be angular, and the base hole 26 may be formed into a rectangular shape.
  • a method of manufacturing the heat exchanging fin 10 which includes the collared tube holes 14 formed by the drawless manner shown in FIGS. 15 A- 15 D, shown in FIGS. 1 - 3 will be explained with reference to FIGS. 6 A- 6 D.
  • a base hole 30 is bored in the metallic plate section 12 (see FIG. 6A). As shown in FIG. 7, the base hole 30 is formed into the regular tetragon, and its corners are rounded.
  • the base hole 30 is burred to form a burred hole 34 whose edge is enclosed by a projected part 32 (see FIG. 6B). Then, diameter of the burred hole 34 is increased, and the projected part 32 is squeezed until an upper zigzag end of a cylindrical section 36 reaches a prescribed height (see FIG. 6C). In the upper zigzag end of the cylindrical section 36 , higher sections 36 a and lower sections 36 b are alternately formed. Four higher sections 36 a (or four lower sections 36 b ) are arranged in the circumferential direction of the cylindrical section 36 with regular separations.
  • the higher sections 36 a correspond to middle parts of linear edges 30 a of the base hole 30 shown in FIG. 7, which has been bored in the metallic plate section 12 ; the lower sections 36 b correspond to corners 30 b of the base hole 30 shown in FIG. 7.
  • the zigzag front end of the cylindrical section 36 are pressed, namely four higher sections 36 a are simultaneously pressed to bend outwardly, so that four radially extended sections 18 a , which are radially outwardly extended from the front end of the collar 20 , are formed (see FIG. 6D).
  • the higher sections 36 a are pressed until the flat sections are formed; parts of the lower sections 36 b are pressed to form the narrow sections 18 b , whose width is narrower than that of the radially extended sections 18 a as shown in FIGS. 2 and 3.
  • the separation between the plate section 12 and each narrow sections 18 b is equal to that between the plate section 12 and each radially extended section 18 a.
  • the tetragonal base hole 30 may have angular corners, and the base hole 30 may be formed into a rectangle.
  • the step of boring the base hole 30 which is formed into the regular tetragon, in the plate section 12 (see FIG. 6A) and the step of burring the base hole 30 (see FIG. 6B) may be executed separately.
  • the boring step and the burring step may be executed simultaneously.
  • the steps may be executed in a press machine, in which the steps are executed in a stroke of a movable die.
  • the higher sections 28 a of the cylindrical section 28 are pressed and bent to form the radially extended sections 18 a . So the height of the top ends of the higher sections 28 a of the cylindrical section 28 , from the metallic plate section 12 , must be a prescribed height; the whole edge of the top end of the cylindrical section 28 need not have the prescribed height.
  • the height of the collared tube hole 14 can be higher than that of the collared tube hole based on the circular base hole 27 . If the height of the collared tube hole 14 is equal to that of the collared tube hole based on the circular base hole 27 , the height of the projected section 22 can be lower.
  • the thickness of the metallic plate section 12 may be thinner and harder than that of a metallic plate section in which the circular base holes 27 will be bored.
  • the height of the collar can be 2 mm or less.
  • the height of the collar 20 which has the flare 18 , can be 2.3 mm.
  • the higher sections 36 a of the cylindrical section 36 are pressed and bent to form the radially extended sections 18 a . So the height of the top ends of the higher sections 36 a of the cylindrical section 36 must be a prescribed height; the whole edge of the top end of the cylindrical section 36 need not have the prescribed height.
  • the pulling force applied to one of the radially extended sections 18 a does not influence other radially extended sections 18 a as well as the drawing manner.
  • the height of the collared tube hole 14 is equal to that of the collared tube hole based on the circular base hole 31 , the height of the cylindrical section 36 can be lower.
  • degree of increasing the diameter of the burred base hole 34 and squeezing the projected part 32 can be lower, so the collared tube hole 14 having the prescribed height can be formed even if the plate section 12 is made of a thin and hard material having lower extensibility.
  • the external shape of the flare 18 of the collared tube hole 14 is the regular tetragonal shape.
  • the external shape of the flare 18 is not limited, so the external shape of the flare 18 of the collared tube hole 14 may be a regular triangle as shown in FIG. 8.
  • the heat exchanging fin shown in FIG. 8 includes: the rectangular metallic plate section 12 , which is made of aluminum; and a plurality of the collared tube holes 41 , which are linearly arranged in the longitudinal direction of the plate section 12 .
  • Each collared tube hole 41 has the collar 20 , in which an edge of the tube hole 16 is enclosed by a flare 42 .
  • the flare 42 includes: radially extended sections 42 a , which are outwardly extended the front (upper) end of the collar 20 ; and narrow sections 42 b , whose width is narrower than that of the radially extended sections 42 a .
  • the radially extended sections 42 a are provided along the outer circumferential face of the collar 20 with regular separations.
  • the flare 42 is formed into a regular triangle and its corners are rounded.
  • the shape of the flare 42 is not limited to the regular triangle having the rounded corners, it may have angular corners and it may be a equilateral triangle, etc.
  • FIGS. 8 and 9 which have the collared tube holes 41 , can be manufactured by the method shown in FIGS. 4 A- 4 D or FIGS. 6 A- 6 D.
  • the methods shown in FIGS. 4 A- 4 D and FIGS. 6 A- 6 D have been described, so detailed explanation will be omitted.
  • the shape of the base hole 26 or 30 is formed into the regular triangle 43 or 44 , which has the rounded corners, as shown in FIG. 10A or 10 B, so that the heat exchanging fins having the collared tube holes 41 , whose shape is shown in FIG. 8 or 9 , can be manufactured.
  • step shown in FIG. 10A corresponds to the step shown in FIG. 4B; the step shown in FIG. 10B corresponds to the step shown in FIG. 6A.
  • the higher sections 28 a or 36 a which are shown in FIG. 4C or 6 C, correspond to middle parts of linear edges 43 a or 44 a of the triangular base hole 43 or 44 shown in FIG. 10A or 10 B.
  • Corners 43 b or 44 b of the triangular base hole 43 or 44 which is included in the circular base hole 27 or 31 , will constitute the lower sections 28 b or 36 b of the cylindrical section 28 or 36 shown in FIG. 4C or 6 C.
  • the flares of the collared tube holes are formed into polygons, but the external shape of the flares may be ellipse as shown in FIG. 11.
  • the heat exchanging fin shown in FIG. 11 includes: the rectangular metallic plate section 12 , which is made of aluminum; and a plurality of the collared tube holes 51 , which are linearly arranged in the longitudinal direction of the plate section 12 .
  • Each collared tube hole 51 has the collar 20 , in which an edge of the tube hole 16 is enclosed by a flare 52 .
  • the flare 52 includes: radially extended sections 52 a , which are outwardly extended the front end of the collar 20 ; and narrow sections 52 b, whose width is narrower than that of the radially extended sections 52 a .
  • the radially extended sections 52 a are symmetrically provided with respect to the tube hole 16 .
  • the flare 52 shown in FIG. 11 is formed into an ellepse, and the radially expanded sections 52 a are expanded in the longitudinal direction of the plate section 12 .
  • FIGS. 11 and 12 which have the collared tube holes 51 , can be manufactured by the method shown in FIGS. 4 A- 4 D or FIGS. 6 A- 6 D.
  • the methods shown in FIGS. 4 A- 4 D and FIGS. 6 A- 6 D have been described, so detailed explanation will be omitted.
  • the shape of the base hole 26 or 30 is formed into the ellipse 53 or 54 as shown in FIG. 13A or 13 B, so that the heat exchanging fins having the collared tube holes 51 , whose shape is shown in FIG. 11 or 12 , can be manufactured.
  • step shown in FIG. 13A corresponds to the step shown in FIG. 4B; the step shown in FIG. 13B corresponds to the step shown in FIG. 6A.
  • the higher sections 28 a or 36 a which are shown in FIG. 4C or 6 C, correspond to middle parts of edges 53 a or 54 a , which is arranged in the direction of the line of upside, of the elliptical base hole 53 or 54 shown in FIG. 13A or 13 B.
  • edges 53 a shown in FIG. 13A are curved edges, and the edges 54 a shown in FIG. 13B are linear edges, but both edges 53 a and 54 a can be formed into the flares 52 .
  • edges 53 b or 54 b of the elliptical base hole 53 or 54 which is included in the circular base hole 27 or 31 , will constitute the lower sections 28 b or 36 b of the cylindrical section 28 or 36 shown in FIG. 4C or 6 C.
  • the collared tube holes 14 , 41 and 51 are linearly arranged in the longitudinal direction of the plate section 12 , but the collared tube holes 14 , 41 and 51 may be arranged in two lines or in a zigzag form.
  • Edges of the radially extended sections 18 a , 42 a and 52 a which are radially outwardly extended from the upper ends of the collars 20 , may be curled toward the metallic plate sections 12 .
  • the curled parts are formed in the radially extended sections 18 a , 42 a and 52 a ; no curled parts are formed in the narrow sections 18 b , 42 b and 52 b .
  • machining oil which invades in the curled parts while press machining, can be easily removed.
  • the collared tube holes having the prescribed height can be formed in the thin and hard plate section, so that the heat exchanging fins can be lighter.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US09/156,394 1998-04-08 1998-09-18 Heat exchanging fin and method of manufacturing the same Abandoned US20030188852A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/346,700 US6209201B1 (en) 1998-04-08 1999-07-02 Method of manufacturing a heat exchanging fin
JP22081799A JP3403126B2 (ja) 1998-09-18 1999-08-04 熱交換器用フィン及びその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10-95992 1998-04-08
JP10095992A JP3038179B2 (ja) 1998-04-08 1998-04-08 熱交換器用フィン及びその製造方法

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090308585A1 (en) * 2008-06-13 2009-12-17 Goodman Global, Inc. Method for Manufacturing Tube and Fin Heat Exchanger with Reduced Tube Diameter and Optimized Fin Produced Thereby
JP2014092347A (ja) * 2012-11-06 2014-05-19 Kobe Steel Ltd 熱交換器用フィンの成形加工方法および熱交換器用フィン
US20140262188A1 (en) * 2013-03-15 2014-09-18 Ramana Venkato Rao Sistla Fin Spacing On An Evaporative Atmospheric Water Condenser
US20160082555A1 (en) * 2013-05-27 2016-03-24 Mitsubishi Electric Corporation Manufacturing method of heat exchanger and refrigeration cycle apparatus
DE102016105645A1 (de) * 2016-03-28 2017-09-28 Howatherm Klimatechnik Gmbh Fertigungsverfahren für einen Wärmeübertrager mit Lamellen auf Rohren sowie Wärmeübertrager
US20180252475A1 (en) * 2015-08-25 2018-09-06 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4188475B2 (ja) * 1998-12-22 2008-11-26 日高精機株式会社 熱交換器の製造方法
US6889759B2 (en) * 2003-06-25 2005-05-10 Evapco, Inc. Fin for heat exchanger coil assembly
CN100435608C (zh) * 2005-01-24 2008-11-19 华信精密股份有限公司 散热装置及其散热片的制作方法
US8257948B1 (en) 2011-02-17 2012-09-04 Purecircle Usa Method of preparing alpha-glucosyl Stevia composition
US9107436B2 (en) 2011-02-17 2015-08-18 Purecircle Sdn Bhd Glucosylated steviol glycoside as a flavor modifier
US9392799B2 (en) 2011-02-17 2016-07-19 Purecircle Sdn Bhd Glucosyl stevia composition
US9386797B2 (en) 2011-02-17 2016-07-12 Purecircle Sdn Bhd Glucosyl stevia composition
US8318459B2 (en) 2011-02-17 2012-11-27 Purecircle Usa Glucosyl stevia composition
JP5062067B2 (ja) * 2007-08-07 2012-10-31 パナソニック株式会社 熱交換器
US10696706B2 (en) 2010-03-12 2020-06-30 Purecircle Usa Inc. Methods of preparing steviol glycosides and uses of the same
US8981081B2 (en) 2010-03-12 2015-03-17 Purecircle Usa Inc. High-purity steviol glycosides
BR112013014589B1 (pt) 2010-12-13 2019-04-02 Purecircle Usa Inc. Método para preparar uma composição de rebaudiosídeo d altamente solúvel
US9510611B2 (en) 2010-12-13 2016-12-06 Purecircle Sdn Bhd Stevia composition to improve sweetness and flavor profile
US10362797B2 (en) 2011-02-10 2019-07-30 Purecircle Sdn Bhd Stevia composition
US9474296B2 (en) 2011-02-17 2016-10-25 Purecircle Sdn Bhd Glucosyl stevia composition
ES2602120T3 (es) * 2011-03-01 2017-02-17 Mitsubishi Electric Corporation Intercambiador de calor, frigorífico con intercambiador de calor, y aire acondicionado con el intercambiador de calor
KR20140103895A (ko) * 2011-11-25 2014-08-27 파나소닉 주식회사 핀 튜브형 열교환기
CN110358795B (zh) 2012-05-22 2024-12-03 谱赛科有限责任公司 高纯度的甜菊醇糖苷
WO2014167827A1 (ja) * 2013-04-09 2014-10-16 パナソニック株式会社 伝熱フィン、熱交換器、および、冷凍サイクル装置
FR3037388B1 (fr) * 2015-06-12 2019-07-26 Valeo Systemes Thermiques Ailette d'un echangeur thermique notamment pour vehicule automobile, et echangeur thermique correspondant
JP6559334B2 (ja) * 2016-04-15 2019-08-14 三菱電機株式会社 熱交換器
CN109804215B (zh) * 2016-10-07 2021-01-15 三菱电机株式会社 热交换器以及空调机
JP6819263B2 (ja) * 2016-12-14 2021-01-27 株式会社ノーリツ 熱交換器、温水装置および熱交換器の製造方法
US11493284B2 (en) 2017-09-30 2022-11-08 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. Heat exchanger and fin
HUP1800157A1 (hu) * 2018-05-11 2020-01-28 Heatventors Kft Fázisváltó anyaggal töltött puffertároló elrendezés
CN109413562B (zh) * 2018-12-29 2021-08-27 歌尔股份有限公司 前盖的加工方法、前盖和发声装置
KR102139085B1 (ko) * 2019-06-07 2020-07-29 박명규 타원형 열교환 튜브가 삽입되는 타원공이 형성된 열교환 핀을 제조하기 위한 금형, 금형 고정 받침판 및 금형 조립체

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458189A (en) * 1945-07-18 1949-01-04 Warren Webster & Co Method of expanding tubing by freezing liquid therein
US3397741A (en) * 1966-02-21 1968-08-20 Hudson Engineering Corp Plate fin tube heat exchanger
US4175308A (en) * 1975-03-19 1979-11-27 Akira Togashi Gathering the ends of heat-conducting pipes in heat exchangers

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR789553A (fr) 1935-05-03 1935-10-31 Delas Perfectionnements aux échangeurs de chaleur à tubes à ailettes
GB489099A (en) 1937-12-30 1938-07-20 Green & Son Ltd Improvements in gilled heat exchange tubes
DE760963C (de) 1941-06-12 1953-06-08 Paul H Dr-Ing Mueller Rippenrohr
US2656808A (en) 1947-03-07 1953-10-27 Kramer Trenton Co Method of producing heat exchange elements
JPS55107897A (en) 1979-02-09 1980-08-19 Nippon Denso Co Ltd Heat exchanger
JPS56165897A (en) 1980-05-22 1981-12-19 Mitsubishi Heavy Ind Ltd Finned tube
DE3423746A1 (de) 1984-06-28 1986-01-09 Thermal-Werke Wärme-Kälte-Klimatechnik GmbH, 6832 Hockenheim Waermetauscherlamelle fuer rohre mit elliptischem oder ovalem querschnitt
JP2735310B2 (ja) 1989-09-08 1998-04-02 株式会社東芝 熱交換器
US5150520A (en) * 1989-12-14 1992-09-29 The Allen Group Inc. Heat exchanger and method of assembly thereof
US5425414A (en) 1993-09-17 1995-06-20 Evapco International, Inc. Heat exchanger coil assembly
US5582246A (en) 1995-02-17 1996-12-10 Heat Pipe Technology, Inc. Finned tube heat exchanger with secondary star fins and method for its production

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458189A (en) * 1945-07-18 1949-01-04 Warren Webster & Co Method of expanding tubing by freezing liquid therein
US3397741A (en) * 1966-02-21 1968-08-20 Hudson Engineering Corp Plate fin tube heat exchanger
US4175308A (en) * 1975-03-19 1979-11-27 Akira Togashi Gathering the ends of heat-conducting pipes in heat exchangers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090308585A1 (en) * 2008-06-13 2009-12-17 Goodman Global, Inc. Method for Manufacturing Tube and Fin Heat Exchanger with Reduced Tube Diameter and Optimized Fin Produced Thereby
JP2014092347A (ja) * 2012-11-06 2014-05-19 Kobe Steel Ltd 熱交換器用フィンの成形加工方法および熱交換器用フィン
US20140262188A1 (en) * 2013-03-15 2014-09-18 Ramana Venkato Rao Sistla Fin Spacing On An Evaporative Atmospheric Water Condenser
US20160082555A1 (en) * 2013-05-27 2016-03-24 Mitsubishi Electric Corporation Manufacturing method of heat exchanger and refrigeration cycle apparatus
US20180252475A1 (en) * 2015-08-25 2018-09-06 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
US10690420B2 (en) * 2015-08-25 2020-06-23 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
DE102016105645A1 (de) * 2016-03-28 2017-09-28 Howatherm Klimatechnik Gmbh Fertigungsverfahren für einen Wärmeübertrager mit Lamellen auf Rohren sowie Wärmeübertrager
EP3231524A1 (de) 2016-03-28 2017-10-18 Howatherm Klimatechnik GmbH Fertigungsverfahren für einen wärmeübertrager mit lamellen auf rohren sowie wärmeübertrager und lamelle
DE102016105645B4 (de) 2016-03-28 2018-06-21 Howatherm Klimatechnik Gmbh Fertigungsverfahren für einen Wärmeübertrager mit Lamellen auf Rohren sowie Wärmeübertrager

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IT1302602B1 (it) 2000-09-29
US6209201B1 (en) 2001-04-03
KR19990081763A (ko) 1999-11-15
JPH11294985A (ja) 1999-10-29
KR100317423B1 (ko) 2002-03-08
ITMI982137A1 (it) 1999-10-09
CN1231419A (zh) 1999-10-13
CN1112565C (zh) 2003-06-25

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