US20060175047A1 - Heat exchanger, method of manufacturing heat exchanger and plate-shaped fin for heat exchanger - Google Patents

Heat exchanger, method of manufacturing heat exchanger and plate-shaped fin for heat exchanger Download PDF

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Publication number
US20060175047A1
US20060175047A1 US11/348,431 US34843106A US2006175047A1 US 20060175047 A1 US20060175047 A1 US 20060175047A1 US 34843106 A US34843106 A US 34843106A US 2006175047 A1 US2006175047 A1 US 2006175047A1
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United States
Prior art keywords
heat exchanger
burring
insertion hole
portions
plate
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
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US11/348,431
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English (en)
Inventor
Takashi Hattori
Hiroshi Nishikawa
Takeshi Okinotani
Yuuji Sako
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Denso Corp
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Denso Corp
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Filing date
Publication date
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Assigned to DENSO CORPORATION reassignment DENSO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HATTORI, TAKASHI, NISHIKAWA, HIROSHI, OKINOTANI, TAKESHI, SAKO, YUUJI
Publication of US20060175047A1 publication Critical patent/US20060175047A1/en
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • 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

Definitions

  • the present invention relates to a heat exchanger, in which a plurality of tubes are inserted into a plurality of laminated plate-shaped fins, and to a method of manufacturing the heat exchanger.
  • the present invention also relates to a plate-shaped fin used for the heat exchanger.
  • a conventional heat exchanger is known in which tubes (These tubes are referred to as flat heat exchange tubes in this Patent Document.) are inserted into insertion holes formed in a plurality of plate-shaped fins which are laminated.
  • tubes These tubes are referred to as flat heat exchange tubes in this Patent Document.
  • rising pieces are formed on two sides, which are opposed to each other, of the opening edge of the insertion hole.
  • One rising piece is bent from the rising point toward the other rising piece side, and the forward end of one rising piece is located outside the rising point.
  • the forward end of the rising piece which is bent in this way, is pushed in the inserting direction of the tube. Under the condition that the bent portion is deformed outwardly, the tube is inserted into the insertion hole. After that, when the pushing force is released, the rising piece and the tube are tightly contacted with each other.
  • the plate-shaped fin and the tube are brazed to each other by the brazing material provided on at least one of the surfaces of the plate-shaped fin and the tube.
  • the plate-shaped fin and the tube can be tightly contacted with each other and the assembling work can be made easy.
  • the above conventional heat exchanger is disadvantageous as follows. In order to deform the rising piece at the time of assembling, it is necessary to apply and release a pushing force, which increases the number of man-hours needed for the assembling work. Further, in the above Patent Document, no specific descriptions are made into the method of applying the pushing force. Therefore, it is difficult to put the above heat exchanger into actual use.
  • the present invention adopts the following technical means.
  • a heat exchanger comprising: a plurality of plate-shaped fins ( 110 ), which are laminated at predetermined intervals, on which a plurality of insertion holes ( 111 ) having burring portions ( 112 ) are formed; and a plurality of tubes ( 120 ) inserted into the insertion holes ( 111 ), wherein the burring portions ( 112 ) and the tubes ( 120 ) are brazed to each other, and at least the burring portions ( 112 ) of the plate-shaped fins ( 110 ) are composed of a plurality of metallic layers for displacing the burring portions ( 112 ) to the side of the insertion holes ( 111 ) according to a rise in the temperature at the time of brazing.
  • the tube ( 120 ) can be smoothly inserted into the insertion hole ( 111 ) and brazed to the burring portion ( 112 ) without an increase in the number of man-hours which is necessary for applying and releasing a pushing force as described in the prior art.
  • the metallic layer can be composed of a core material ( 110 A) and a brazing material ( 110 B) clad onto one of the faces of the core material ( 110 A).
  • the sacrificial corrosion material ( 110 c ), which conducts a sacrificial corrosion action upon the tube ( 120 ), is provided on a face on the side opposite to the face on which the brazing material ( 110 B) is provided, it is possible to suppress the occurrence of corrosion on the tube ( 120 ) side. Therefore, it is possible to prevent a leakage of the inner fluid from the tube ( 120 ) and the life of the heat exchanger can be prolonged.
  • the metallic layer may include: a core material ( 110 A); a first brazing material ( 110 B); and a second clad material ( 110 D), wherein and the first brazing material ( 110 B) and the second clad material ( 110 D) are respectively clad on a surface and a reverse face of the core material ( 110 A).
  • the brazing material ( 110 D) can be supplied from a portion closer to a portion where the tube ( 120 ) and the burring portion ( 112 ) are joined to each other at the time of brazing. Therefore, the brazing property can be further enhanced.
  • a direction, in which rising points of the burring portions ( 112 ) are connected to each other is the same as a rolling direction of the plate-shapes fins ( 110 ).
  • the direction in which the rising points of the burring portions ( 112 ) are connected to each other becomes the same as the direction of the metallic crystal grains of the fin which is determined by rolling. Therefore, rigidity of the burring portion ( 112 ) in the displacement direction can be lowered and the burring portion ( 112 ) can be more smoothly displaced.
  • a cross section of the tube ( 120 ) is formed into a flat shape
  • the burring portions ( 112 ) are formed on two sides of the insertion hole ( 111 ) corresponding to a long side of the flat cross section of the tube ( 120 )
  • a positioning portion ( 113 ) for positioning the tube ( 120 ) is provided in a portion of the insertion hole ( 111 ) corresponding to an end portion of the flat cross section in the longitudinal direction.
  • two cutout portions ( 114 ), which are cut out onto the side opposite to the insertion hole side, are formed at a peripheral edge of the insertion hole ( 111 ), and the burring portion ( 112 ) is formed at a base point of a connecting line ( 112 a ) to connect bottom portions of the cutout portions ( 114 ) between the two cutout portions ( 114 ).
  • the substantial length of the burring portion ( 112 ) can be elongated, and the burring portion ( 112 ) can be more positively contacted or closely contacted with the tube ( 120 ).
  • the overall plate-shaped fin ( 110 ) is composed of a plurality of metallic layers, a displacement of the general portions except for the burring portion ( 112 ) can be positively suppressed or a displacement of the overall fin ( 110 ) can be positively suppressed at the time of brazing.
  • the burring portions ( 112 ) are arranged at the peripheral edge of the insertion hole ( 111 ) being opposed to each other, and a portion, the rising height of which is higher than the opposing side, is formed in each burring portion ( 112 ).
  • the burring portion ( 112 ) can be positively contacted or closely contacted with the tube ( 120 ). Under the condition that at least this portion is made to be a starting point, the brazing material ( 110 B) gets into the gap portion ( 130 ) formed between the tube ( 120 ) and the burring portion ( 112 ) by the capillary phenomenon. Therefore, brazing can be positively executed.
  • a thickness removing portion ( 116 ) is formed in the neighborhood of a portion where the rising points of the burring portions ( 112 ) are connected to each other or in the neighborhood of the base point.
  • the rigidity can be lowered at the rising point of the burring portion ( 112 ) or the base point. Therefore, even in the positional relation in which the burring portion ( 112 ) is contacted with the tube ( 120 ) at the time of inserting the tube ( 120 ), the burring portion ( 120 ) can be easily deformed and the resistance can be reduced at the time of inserting the tube ( 120 ).
  • the burring portion ( 112 ) includes: a first metallic layer ( 110 A) arranged on the insertion hole ( 111 ) side; and a second metallic layer ( 110 B), which is arranged on the side opposite to the insertion hole side, to be penetrated into the first metallic layer ( 110 A) and to swell the first metallic layer ( 110 A) so that the burring portion ( 112 ) can be displaced to the insertion hole ( 111 ) side.
  • the burring portion ( 112 ) can be positively contacted or closely contacted with the tube ( 120 ) side.
  • the burring portion ( 112 ) may include a plurality of metallic layers ( 110 A 1 , 110 A 2 ), the coefficients of thermal expansion of which are different from each other so as to exhibit the bimetal effect so that the burring portion ( 112 ) can be displaced to the insertion hole ( 111 ) side.
  • a method of manufacturing a heat exchanger comprising the steps of: laminating a plurality of plate-shaped fins ( 110 ), in which a plurality of insertion holes ( 111 ) having the burring portions ( 112 ) are formed, at regular intervals; inserting a plurality of tubes ( 120 ) into the insertion holes ( 111 ); and brazing the burring portions ( 112 ) and the tubes ( 120 ) to each other, wherein at least the burring portions ( 112 ) of the plate-shaped fins ( 110 ) are composed of a plurality of metallic material layers so that the burring portions ( 112 ) can be displaced to the insertion holes ( 111 ) side according to a rise in the temperature to the brazing temperature, and after the tubes ( 120 ) have been inserted into the insertion holes ( 111 ), the burring portions ( 112 ) are displaced and contacted with the tubes ( 120 ) and brazing is conducted.
  • the above-identified method can be a method of manufacturing the first aspect of a heat exchanger ( 100 ).
  • gaps are formed between the burring portions ( 112 ) and the tubes ( 120 ) when the tubes ( 120 ) are inserted into the insertion holes ( 111 ).
  • the tubes ( 120 ) are inserted into the insertion holes ( 111 ) at the normal temperature.
  • the burring portion ( 112 ) includes: a first metallic layer ( 110 A) arranged on the insertion hole ( 111 ) side; and a second metallic layer ( 110 B), which is arranged on the side opposite to the insertion hole side, to be penetrated into the first metallic layer ( 110 A) and to swell the first metallic layer ( 110 A) so that the burring portion ( 112 ) can be displaced to the insertion hole ( 111 ) side.
  • the above-identified method can be a method of manufacturing the eleventh aspect of a heat exchanger ( 100 ).
  • the burring portion ( 112 ) including: a plurality of metallic layers ( 110 A 1 , 110 A 2 ), the coefficients of thermal expansion of which are different from each other so as to exhibit the bimetal effect so that the burring portion ( 112 ) can be displaced to the insertion hole ( 111 ) side.
  • the above-identified method can be a method of manufacturing the twelfth aspect of a heat exchanger ( 100 ).
  • the eighteenth to twenty-ninth aspects of the inventions relate to a plate-shaped fin used for a heat exchanger in which the burring portions ( 112 ) are provided in the insertion holes ( 111 ) into which a plurality of tubes ( 120 ) are inserted, while the above-identified fins are provided in the first to twelfth aspect of heat exchangers to have substantially the same technical effect.
  • FIG. 1 is an exploded perspective view showing a heat exchanger of the first embodiment
  • FIG. 2 is a front view showing a tube of the first embodiment
  • FIG. 3A is a front view showing a plate fin of the first embodiment
  • FIG. 3B is a sectional view taken on line A-A in FIG. 3A ;
  • FIG. 4 is an enlarged sectional view showing a burring portion of FIG. 3A ;
  • FIG. 5 is a block diagram showing an outline of the process of manufacturing the heat exchanger of the first embodiment
  • FIG. 6 is a sectional view showing a state of brazing between the plate fin and the tube of the first embodiment
  • FIG. 7 is an enlarged sectional view showing a burring portion of Variation 1 of the first embodiment
  • FIG. 8 is an enlarged sectional view showing a burring portion of Variation 2 of the first embodiment
  • FIG. 9 is a perspective view showing a plate fin of the second embodiment.
  • FIG. 10A is a front view showing a plate fin of the third embodiment
  • FIG. 10B is a perspective view showing the plate fin of the third embodiment
  • FIG. 11 is a perspective view showing a plate fin of the fourth embodiment
  • FIG. 12 is an enlarged sectional view showing a burring portion of Another Embodiment 1;
  • FIG. 13A is a front view showing a plate fin of Another Embodiment 2;
  • FIG. 13B is a sectional view taken on line B-B in FIG. 13A ;
  • FIG. 14A is a front view showing a plate fin of Another Embodiment 3.
  • FIG. 14B is a sectional view taken on line C-C in FIG. 14A .
  • FIG. 1 is a perspective view showing a heat exchanger 100 of the first embodiment
  • FIG. 2 is a front view showing a tube 120
  • FIG. 3A is a front view showing a plate fin 110
  • FIG. 3B is a sectional view taken on line A-A in FIG. 3A
  • FIG. 4 is an enlarged sectional view showing a burring portion 112 of FIG. 3A
  • FIG. 5 is a block diagram showing an outline of the process of manufacturing the heat exchanger 100
  • FIG. 6 is a sectional view showing a state of brazing between the plate fin 110 and the tube 120 .
  • the heat exchanger 100 of this embodiment is arranged in a heat pump cycle of a hot-water supplying unit for domestic use and applied to an air heat exchanger (evaporator) for absorbing heat from the outside air.
  • the heat exchanger 100 is composed as follows. As shown in FIGS. 1 and 2 , a plurality of tubes 120 are inserted (or penetrate) into the insertion holes 111 of a plurality of plate fins (which correspond to the plate-shaped fins of the present invention) which are laminated at predetermined intervals, so that the core portions 101 , which become the heat exchange portion, can be composed. Both end portions of the tubes 120 in the longitudinal direction are connected to the tube holes 143 of a pair of header tanks 141 , 142 .
  • each tube 120 has a plurality of circular passages 121 inside.
  • a cross section of each tube 120 is formed into a flat shape (for example, the thickness d is 1 mm and the size in the longitudinal direction is 23 mm) by means of extrusion.
  • Each header tank 141 , 142 is composed in such a manner that the caps 144 are provided at both end portions in the longitudinal direction of a cylindrical member which is formed, for example, by means of extrusion.
  • the refrigerant inlet portion 151 and the refrigerant outlet portion 152 which are respectively communicated with the inside, are provided in the header tanks 141 , 142 .
  • the above components are made of aluminum or an aluminum alloy. After the above components are assembled into the shape of the heat exchanger 100 , they are integrally brazed with each other by the brazing material previously provided on surfaces of predetermined components (In this case, the predetermined components are the plate-shaped fin 110 and the header tanks 141 , 142 .)
  • the refrigerant flows in the heat pump cycle from the refrigerant inlet portion 151 into the header tank 141 and is distributed into the tubes 120 . After that, the refrigerant is collected into the header tank 142 and flows out from the refrigerant outlet portion 152 .
  • the refrigerant is circulated in the tubes 120 (the core portion 101 )
  • heat is exchanged between the refrigerant and the outside air, so that heat is absorbed from the outside air by the refrigerant.
  • the joining structure of joining the plate-shaped fin 110 to the tube 120 is characterized, and the detail will be explained below by referring to FIGS. 3A to 4 .
  • the plate-shaped fin 110 (which will be referred to as a fin hereinafter) is a thin strip member.
  • a plurality of insertion holes 111 are provided in the longitudinal direction (shown in FIG. 1 ).
  • Each insertion hole 111 provided in the plate-shaped fin 110 is formed into a flat shape so that it can correspond to the cross sectional shape of the tube 120 (shown in FIG. 2 ).
  • the burring portions 112 On the two sides of the insertion hole 111 corresponding to the long side, are formed by means of press forming.
  • the positioning portions 113 On the end portion sides of the insertion hole 111 in the longitudinal direction, the positioning portions 113 , the shapes of which are respectively formed into a crescent shape, are formed being opposed to each other simultaneously with the formation of the burring portion 112 by means of press forming.
  • the positioning portions 113 are arranged at the central position of both the burring portions 112 .
  • the inside size of the positioning portions 113 is determined so that the positioning portions 113 can be substantially contacted with the end portions in the longitudinal direction of the flat cross section of the tube 120 .
  • the cutout portions 114 which are cut out so that the cutout portions can extend to the side opposite to the insertion hole side.
  • two cutout portions 114 are formed for one long side, that is, four cutout portions 114 are formed in total.
  • Each burring portion 112 described above is provided between two cutout portions 114 .
  • the burring portion 112 is formed into a gentle R-shape so that the rising height of the edge portion of the burring portion 112 can be “h” from the base point which is the connecting line 112 a of the cutout portions 114 .
  • the connecting line 112 a corresponds to the line connecting the rising points of the burring portions 112 .
  • the direction of the connecting line 112 a is the same as the rolling direction (shown by arrows in FIGS. 3A and 3B ) of the fin 110 composed of a strip material.
  • the size D of the burring portion 112 on the opening side (the forward end side) is set to be larger than the thickness d of the tube 120 . Therefore, when the tube 120 is inserted into the insertion hole 111 in the assembling stage, that is, when the tube 120 is inserted in the direction of the white arrow in FIG. 4 , the gap portion 130 ((D ⁇ d)/2) can be formed between the wall face of the tube 120 and the burring portion 112 .
  • the fin 110 is composed of a core material 110 A, which corresponds to the first metallic layer of the present invention, and a brazing material, which corresponds to a brazing material of the present invention, that is, which corresponds to the second metallic layer of the present invention, previously clad on one face of the core material 110 A.
  • the brazing material 110 B is provided on a face of the burring portion 112 on the opposite side to the insertion hole side.
  • the material of the core material 110 A is an alloy, the alloy number of which is 3003 (JIS-H-4000), and the thickness is 0.08 mm.
  • the material of the brazing material 110 B is an alloy, the alloy number of which is 4045 (JIS-Z-3263), and the thickness is 0.02 mm.
  • the silicon (Si) content of the brazing material 110 B is higher than that of the core material 110 A. Therefore, the coefficient of thermal expansion of the brazing material 110 B is different from that of the core material 110 A. The coefficient of thermal expansion of the brazing material 110 B is lower than that of the core material 110 A.
  • the core material 110 A is swelled.
  • a side of the core material close to the brazing material 110 B is greatly swelled. Accordingly, the entire core material 110 A is warped being deformed to the side on which the brazing material 110 B is not provided. That is, when the temperature of the fin 110 is raised from the normal temperature to the brazing temperature, an irreversible deformation is caused in the fin 110 .
  • the burring portion 112 when the fin material 110 is partially raised in the direction opposite to the direction of the irreversible deformation and mechanically given a plastic deformation, the burring portion 112 can be formed. Therefore, the irreversible deformation caused by the temperature change deforms the burring 112 in the direction of restoring the above mechanical plastic deformation. That is, the burring portion 112 is composed of the two metallic layers (the core material 110 A and the brazing material 110 B) so that the burring portion 112 can laminated by the two metallic layers.
  • the burring portion 112 is displaced to the insertion hole 111 side by a rise in the temperature to the brazing temperature at the time of brazing described later, that is, the opening side size D is reduced to the size E.
  • the fin 110 explained above is formed by means of press forming.
  • the tube 120 is formed by means of extrusion. These fin 110 and tube 120 are respectively prepared separately from each other as described above.
  • the header tanks 141 , 142 are formed by means of extrusion.
  • the tube hole 143 is formed on the side wall of each header tank. Then, the cap 144 , the refrigerant inlet portion 151 and the refrigerant outlet portion 152 are respectively attached and temporarily caulked to each header tank 141 , 142 .
  • each tube 120 is inserted (penetrated) into each insertion hole 111 , so that the core portion 101 can be assembled. Then, both end portions in the longitudinal direction of each tube 120 are engaged with the tube holes 143 of the header tanks 141 , 142 . In this way, an assembled body of the heat exchanger 100 can be made.
  • flux for example, a non-corrosive flux such as fluoro potassium aluminate
  • this assembled body is put into a brazing furnace, the atmosphere in which is an inert gas (for example, nitrogen).
  • an inert gas for example, nitrogen
  • the furnace temperature is approximately 600° C. and the heating time is approximately one hour.
  • the burring portion 112 of the fin 110 is contacted or closely contacted with the wall face 122 of the tube 120 as shown by the arrow in FIG. 6 , and the brazing material 110 B (shown in FIG. 4 ), which is clad on the fin 110 , gets into a portion between the forward end portion of the burring portion 112 and the wall face 122 and a fillet is formed.
  • the brazing material 110 B shown in FIG. 4
  • the header tanks 141 , 142 and the tube 120 are brazed by the brazing material clad on the header tanks 141 , 142 .
  • the header tanks 141 , 142 and the cap 144 , the refrigerant inlet portion 151 and the refrigerant outlet portion 152 are respectively brazed by the brazing material clad on the header tanks 141 , 142 .
  • the gap portion 130 is formed between the tube 120 and the burring portion 112 . Therefore, the insertion property of the tube 120 can be enhanced.
  • the burring portion 112 is positively contacted or closely contacted with the tube 120 side by the swelling of the core material 110 A. Therefore, the burring portion 112 can be surely brazed to the tube 120 side. Accordingly, brazing can be positively conducted. As described above, without an increase in the number of man-hours as explained in the item of the prior art, the excellent insertion property and the excellent brazing property of the tube 120 can be ensured.
  • the burring portion 112 is formed on the base point of the connecting line 112 a to connect the bottom portions of the cutout portions 114 between the two cutout portions 114 , the substantial length of the burring portion 112 can be increased. Therefore, the burring portion 112 can be tightly contacted with the tube 120 .
  • the direction of the connecting line 112 a which is the base point of the burring portion 112
  • the direction of the connecting line 112 a is the same as the direction of the metallic crystal grains of the fin 110 determined by rolling. Therefore, the rigidity of the burring portion 112 in the direction of displacement can be lowered. Accordingly, the burring portion 112 can be more smoothly displaced.
  • each burring portion 112 and the tube 120 can be positively contacted or closely contacted with the tube 120 .
  • Variation 1 described below may be adopted.
  • the sacrificial corrosion material 110 C for example, the material of aluminum to which zinc is added
  • the life of the heat exchanger can be prolonged by preventing the fluid from leaking out from the tube 120 .
  • Variation 2 described below may be adopted.
  • the brazing material of the fin 110 the brazing material 110 B, which corresponds to the first brazing material of the present invention, and the brazing material 110 D, which corresponds to the second brazing material of the present invention, are clad on the surface and the reverse face of the core material 110 A.
  • the brazing material (the brazing material 110 D) can be supplied from a portion located closer to the joining portion. Therefore, the brazing property can be further enhanced.
  • the second embodiment of the present invention is shown in FIG. 9 .
  • the second embodiment is composed in such a manner that the rib 115 is added to the fin 110 of the first embodiment.
  • a cross section of each rib 115 is triangular, and the rib 115 is provided along the side of the fin 110 in the direction in which the tubes 120 are arranged.
  • this rib 115 is formed simultaneously when the fin 110 is formed by means of press forming.
  • the displacement of the general portion (the portion of the fin 110 located between the tubes 120 ) except for the burring portion 112 can be positively suppressed.
  • the displacement of the entire fin 110 can be positively suppressed.
  • the third embodiment is shown in FIGS. 10A, 10B .
  • the third embodiment is composed in such a manner that a portion of the burring portion 112 , the rising height of which is high with respect to the opposing side, is provided in the first embodiment described before.
  • the burring portion 112 is composed of a thickness portion between the connecting lines 112 a (the two-dotted chain lines in FIG. 10A ) which are opposed to each other in a flat plate state of the fin 110 (a state of development by press forming). In this case, when this thickness portion is obliquely divided so that the burring portions 112 , the heights of which are different from each other, can be formed.
  • the burring portion 112 can be positively contacted or closely contacted with the tube 120 . Therefore, when at least the portion is used as a starting point, the brazing material 110 B can get into the gap portion 130 by the capillary phenomenon. Therefore, brazing can be positively conducted.
  • the fourth embodiment of the present invention is shown in FIG. 11 .
  • the fourth embodiment is composed in such a manner that the thickness removing portions 116 from which the thickness is removed into circular holes, are provided in the neighborhood of the connecting line 112 a , which is the base point of the burring portion 112 , in the Embodiment 1 described before, Due to the foregoing, the rigidity of the burring portion 112 at the base point can be reduced. Therefore, even when the positional relation is established so that the burring portion 112 can be contacted with the tube 120 at the time of inserting the tube 120 , the burring portion 112 can be easily deformed. Accordingly, resistance can be reduced at the time of inserting the tube 120 .
  • the mother metal layer is composed of two layers. That is, the mother metal layer is composed of aluminum alloy layers, the coefficients of thermal expansion of which are different from each other. That is, the first material member 110 A 1 , which corresponds to the metallic layer of the present invention, and the second material member 110 A 2 , which corresponds to the metallic layer of the present invention, may be laminated.
  • the first member 110 A 1 the coefficient of thermal expansion of which is high
  • the second member 110 A 2 the coefficient of thermal expansion of which is low
  • the brazing material is clad on the surface of the first member 110 A 1 .
  • the burring portion 112 Due to the difference between the coefficients of thermal expansion of the members 110 A 1 , 110 A 2 , the burring portion 112 is warped by the bimetal effect caused by a rise in the temperature at the time of brazing, and the burring portion 112 positively comes into contact with the tube 120 . Further, the penetration of the brazing material is added and the burring portion 112 is further warped and positively contacted with the tube 120 . In this connection, a material, the penetration of which is small, may be used for the brazing material and the burring portion 112 may be contacted with the tube 110 only by the bimetal effect of the aluminum alloy layer.
  • the burring portions 112 are provided on both sides of the tube 120 , however, the burring portion 112 may be provided only on one side of the tube 120 .
  • the burring portion 112 capable of being deformed by a change in the temperature, can be provided being opposed only to a main face of the flat tube 120 .
  • a cutting end face can be arranged being opposed to the other main face of the flat tube 120 .
  • a receiving face which is deformed only a little with respect to a temperature change, can be formed.
  • a receiving face which is not deformed at all with respect to a temperature change, can be formed.
  • the rising point 117 is formed between the connecting line 112 b (the base point) and the forward end portion, and the burring portion 112 may be formed obliquely or vertically toward the forward end portion of this rising point 117 .
  • the gap portion 130 may be substantially zero at the time of inserting the tube 120 , that is, the burring portion 112 is contacted with the tube 120 at the time of inserting the tube 120 , and the burring portion 112 may be positively, closely contacted with the tube 110 by the displacement action at the time of brazing.
  • the tube 120 is inserted at a predetermined temperature (for example, at a low temperature), so that the gap portion 130 can be ensured.
  • a predetermined temperature for example, at a low temperature
  • the burring portion 112 may be contacted with the tube 110 , and further the burring portion 112 may be closely contacted with the tube 110 at the time of brazing.
  • the positioning portion 113 may be omitted.
  • the cutout portion 114 may be omitted.
  • the present invention is not limited to the above specific embodiment. Copper material or stainless steel may be applied to the present invention.
  • the objective heat exchanger is not limited to the air heat exchanger 100 used for a heat pump. As long as the fin 110 composing the core portion 101 is of the plate-type and as long as the tube 120 is brazed after it has been inserted, the present invention can be applied to various components such as a radiator, a heater core and a condenser.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US11/348,431 2005-02-07 2006-02-06 Heat exchanger, method of manufacturing heat exchanger and plate-shaped fin for heat exchanger Abandoned US20060175047A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-030961 2005-02-07
JP2005030961A JP2006214702A (ja) 2005-02-07 2005-02-07 熱交換器、熱交換器の製造方法および熱交換器用板状フィン

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US20060175047A1 true US20060175047A1 (en) 2006-08-10

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US (1) US20060175047A1 (ko)
JP (1) JP2006214702A (ko)
KR (1) KR100741524B1 (ko)
CN (1) CN100480606C (ko)
DE (1) DE102006005320A1 (ko)

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US20110024037A1 (en) * 2009-02-27 2011-02-03 International Mezzo Technologies, Inc. Method for Manufacturing A Micro Tube Heat Exchanger
US20140083664A1 (en) * 2012-09-27 2014-03-27 Samsung Electronics Co., Ltd. Heat exchanger
US20140202442A1 (en) * 2013-01-21 2014-07-24 Carrier Corporation Condensing heat exchanger fins with enhanced airflow
US20150075213A1 (en) * 2012-04-26 2015-03-19 Mitsubishi Electric Corporation Heat exchanger, method for fabricating heat exchanger, and air-conditioning apparatus
US20160003548A1 (en) * 2014-07-07 2016-01-07 Keihin Thermal Technology Corporation Heat exchanger and method of manufacturing the same
US20160061537A1 (en) * 2014-08-28 2016-03-03 Delphi Technologies, Inc. Heat exchanger fin retention feature
CZ306476B6 (cs) * 2013-02-08 2017-02-08 Vysoké Učení Technické V Brně Žebrovaná trubka s podélnými žebry pro zvýšení schopnosti turbulence média
US20180106498A1 (en) * 2016-10-14 2018-04-19 Rinnai Corporation Heat exchanger and combustion device
US20180135921A1 (en) * 2015-06-12 2018-05-17 Valeo Systemes Thermiques Fin of a heat exchanger, notably for a motor vehicle, and corresponding heat exchanger
US20180320989A1 (en) * 2016-02-24 2018-11-08 Mitsubishi Electric Corporation Heat exchanger
US11156413B2 (en) 2016-12-26 2021-10-26 T.Rad Co., Ltd. Metal plate burring method

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JP5255334B2 (ja) * 2008-06-17 2013-08-07 古河電気工業株式会社 ヒートパイプの固定方法およびヒートパイプ保持構造体
JP5517728B2 (ja) * 2010-04-27 2014-06-11 サンデン株式会社 熱交換器及び熱交換器の製造方法
JP5725914B2 (ja) * 2011-03-08 2015-05-27 三菱電機株式会社 熱交換器の製造方法
JP5582364B2 (ja) * 2012-02-01 2014-09-03 株式会社デンソー 突起形成装置、突起形成方法および熱交換器
JP2012233683A (ja) * 2012-07-06 2012-11-29 Ihi Corp 熱交換器の製造方法
JP6455103B2 (ja) * 2014-11-28 2019-01-23 株式会社富士通ゼネラル 熱交換器

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US5732768A (en) * 1996-02-26 1998-03-31 Magneti Marelli Climatizzazione S.R.L Condenser for air-conditioning systems for vehicles
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110024037A1 (en) * 2009-02-27 2011-02-03 International Mezzo Technologies, Inc. Method for Manufacturing A Micro Tube Heat Exchanger
US8177932B2 (en) 2009-02-27 2012-05-15 International Mezzo Technologies, Inc. Method for manufacturing a micro tube heat exchanger
US20150075213A1 (en) * 2012-04-26 2015-03-19 Mitsubishi Electric Corporation Heat exchanger, method for fabricating heat exchanger, and air-conditioning apparatus
US9671177B2 (en) * 2012-04-26 2017-06-06 Mitsubishi Electric Corporation Heat exchanger, method for fabricating heat exchanger, and air-conditioning apparatus
US20140083664A1 (en) * 2012-09-27 2014-03-27 Samsung Electronics Co., Ltd. Heat exchanger
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US20140202442A1 (en) * 2013-01-21 2014-07-24 Carrier Corporation Condensing heat exchanger fins with enhanced airflow
US10006662B2 (en) * 2013-01-21 2018-06-26 Carrier Corporation Condensing heat exchanger fins with enhanced airflow
CZ306476B6 (cs) * 2013-02-08 2017-02-08 Vysoké Učení Technické V Brně Žebrovaná trubka s podélnými žebry pro zvýšení schopnosti turbulence média
US9827638B2 (en) * 2014-07-07 2017-11-28 Keihin Thermal Technology Corporation Heat exchanger and method of manufacturing the same
US20160003548A1 (en) * 2014-07-07 2016-01-07 Keihin Thermal Technology Corporation Heat exchanger and method of manufacturing the same
US20160061537A1 (en) * 2014-08-28 2016-03-03 Delphi Technologies, Inc. Heat exchanger fin retention feature
US10139172B2 (en) * 2014-08-28 2018-11-27 Mahle International Gmbh Heat exchanger fin retention feature
US20180135921A1 (en) * 2015-06-12 2018-05-17 Valeo Systemes Thermiques Fin of a heat exchanger, notably for a motor vehicle, and corresponding heat exchanger
US20180320989A1 (en) * 2016-02-24 2018-11-08 Mitsubishi Electric Corporation Heat exchanger
US20180106498A1 (en) * 2016-10-14 2018-04-19 Rinnai Corporation Heat exchanger and combustion device
US10365014B2 (en) * 2016-10-14 2019-07-30 Rinnai Corporation Heat exchanger and combustion device
US11156413B2 (en) 2016-12-26 2021-10-26 T.Rad Co., Ltd. Metal plate burring method

Also Published As

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JP2006214702A (ja) 2006-08-17
CN1818529A (zh) 2006-08-16
CN100480606C (zh) 2009-04-22
KR20060090195A (ko) 2006-08-10
DE102006005320A1 (de) 2006-09-07
KR100741524B1 (ko) 2007-07-20

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