WO2021054173A1 - Ailette de transfert de chaleur et son procédé de fabrication - Google Patents

Ailette de transfert de chaleur et son procédé de fabrication Download PDF

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Publication number
WO2021054173A1
WO2021054173A1 PCT/JP2020/033772 JP2020033772W WO2021054173A1 WO 2021054173 A1 WO2021054173 A1 WO 2021054173A1 JP 2020033772 W JP2020033772 W JP 2020033772W WO 2021054173 A1 WO2021054173 A1 WO 2021054173A1
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WO
WIPO (PCT)
Prior art keywords
heat transfer
strip
fin
shaped
side wall
Prior art date
Application number
PCT/JP2020/033772
Other languages
English (en)
Japanese (ja)
Inventor
真弘 福田
Original Assignee
株式会社最上インクス
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 株式会社最上インクス filed Critical 株式会社最上インクス
Priority to JP2021546615A priority Critical patent/JPWO2021054173A1/ja
Publication of WO2021054173A1 publication Critical patent/WO2021054173A1/fr

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    • 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
    • F28F1/30—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 being attachable to the element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation

Definitions

  • the present invention relates to, for example, a heat transfer fin used in a heat exchanger and a method for manufacturing the same.
  • a corrugated fin is joined to a heat transfer member, and a fluid such as air is passed between the fins of the corrugated fin to exchange heat between the heat transfer member and the fluid via the corrugated fin.
  • a fluid such as air
  • the corrugated fin in order to increase the surface area of the corrugated fin, it is conceivable to reduce the fin pitch of the corrugated fin or to make the flow path wavy. Further, in order to improve the heat transfer coefficient between the corrugated fin and the fluid, it is considered that the upper surface and the bottom surface of the corrugated fin are cut up inward to form protrusions.
  • the present invention has been made to solve the above-mentioned problems, and its main object is to improve the heat exchange efficiency between the heat transfer member and the fluid while suppressing the increase in pressure loss. Is.
  • the heat transfer fin according to the present invention includes a corrugated fin main body portion formed by connecting the top and valley portions with side wall portions, and a strip-shaped portion extending from one side or both sides of each of the plurality of side wall portions.
  • the present invention is characterized in that at least one of the plurality of strip-shaped portions has a twisted shape.
  • the strip-shaped portion provided on the side wall of the fin body has a twisted shape, so that the fluid passing through the heat transfer fin is wasted along the twisted shape of the strip-shaped portion.
  • the fluid flows while stirring the laminar flow or a state close to the laminar flow without generating a vortex.
  • the agitated fluid thins the boundary film between the heat transfer member provided with the heat transfer fins and the fluid, and its thermal resistance can be reduced.
  • the corrugated fins do not rely on fine shapes such as pinching pitch and unevenness, so that it is possible to prevent performance deterioration due to clogging of foreign matter such as dust.
  • every other strip-shaped portion having a twisted shape is provided along the arrangement direction of the plurality of side wall portions.
  • flat plate-shaped strip-shaped portions and twisted strip-shaped portions having a twisted shape are alternately provided.
  • all of the plurality of strip-shaped portions may have the twisted shape.
  • heat transfer fin When joining a heat transfer fin to a heat transfer member such as a heat transfer plate, in order to enable joining not only the fin body but also the band-shaped part to the heat transfer member, heat transfer is performed to the free end of the band-shaped part. It is desirable that a rising joint portion to be joined to the thermal member is provided. With this configuration, the free ends of the plurality of strips can be aligned to accurately determine the spacing between the plurality of strips, and the durability of the heat transfer fins can be improved.
  • a corrugated second fin main body portion formed by connecting the top portion and the valley portion with a side wall portion is connected to the free end portions of the plurality of strip-shaped portions.
  • the distance between the plurality of strips is determined by the pair of fin main bodies.
  • the pair of fin main bodies may be joined to a heat transfer member such as a heat transfer plate, assembly becomes easy.
  • the durability of the heat transfer fins can be improved.
  • the heat transfer fin When the heat transfer fin is composed of a plurality of parts, the parts are joined by brazing or welding, but in that case, the heat exchange performance of the heat transfer fin deteriorates due to the contact heat resistance of each part. It ends up. In addition, it also causes a vortex to be generated at the joint portion. Therefore, it is desirable that the strip-shaped portion is integrally formed with the side wall portion.
  • a metal plate is bent to form a corrugated fin main body portion in which a top portion and a valley portion are connected by a side wall portion, and each of the plurality of side wall portions is formed. It is characterized in that a band-shaped portion extending from one side or both sides is formed, and a twisted shape is formed in at least one of the plurality of the strip-shaped portions.
  • the heat transfer fin 100 of the present embodiment has a corrugated fin main body 2 formed by connecting a top portion 21 and a valley portion 22 by a side wall portion 23, and from one side of each of the plurality of side wall portions 23. It is provided with a strip-shaped portion 3 provided by stretching.
  • the fin main body 2 has a flat plate-shaped top portion 21, a flat plate-shaped valley portion 22, and a flat plate-shaped side wall portion 23 connecting them. That is, the fin main body 2 has a rectangular wavy cross section. Further, the fin main body portion 2 is a flat-top-shaped corrugated fin in which at least two or more basic shapes including one top portion 21 and a pair of side wall portions 23 connected to the top portion 21 are continuously formed. In addition, as shown in ⁇ Modification Example> of FIG. 2, at least one of the top portion 21 and the valley portion 22 of the fin main body portion 2 may have an arcuate cross section. In the ⁇ modification example> of FIG. 2, a round top-shaped corrugated fin in which both the top portion 21 and the valley portion 22 have an arcuate cross section is illustrated.
  • the fin main body 2 is joined to a heat transfer member (not shown) so that a fluid flows between the side walls 23 adjacent to each other.
  • a heat transfer member (not shown) so that a fluid flows between the side walls 23 adjacent to each other.
  • at least the top 21 or the valley 22 is formed.
  • One is joined to the heat transfer member.
  • one of the top 21 or the valley 22 is joined to the heat transfer member, and when joined to two heat transfer members, the top 21 and the valley 22 are joined.
  • the strip-shaped portion 3 has an elongated shape, and is in the width direction of the side wall portion 23 (direction of the flow path formed between the side wall portions 23) from one side of the side wall portion 23. It is provided so as to extend to the outside of the side wall portion 23 along the above. That is, a flow path is formed between the strips 3 adjacent to each other.
  • the band-shaped portion 3 of the present embodiment is integrally formed with the side wall portion 23.
  • the torsional shape is formed by rotating the free end portion 3a of the strip-shaped portion 3 around the central axis of the strip-shaped portion 3 by, for example, 180 degrees, and not only the torsional shape that changes continuously (smoothly). , It may be a twisted shape that changes stepwise.
  • FIG. 1 illustrates a twisted shape that changes continuously (smoothly).
  • the twist angle of the twist shape is not limited to 180 degrees and can be various angles.
  • the twisted shape may be twisted with a uniform degree of twist in the direction of the central axis of the strip-shaped portion 3, or may have a degree of twist changed in the middle.
  • the strip-shaped portion 3 having a twisted shape (hereinafter, also referred to as “twisted strip-shaped portion 3X”) is along the arrangement direction of the plurality of side wall portions 23 (direction in which the side wall portions 23 face each other). It is provided every other one (see FIG. 1). That is, the flat plate-shaped strips 3 having no twisted shape (hereinafter, also referred to as “flat strip strips 3Y”) and the twisted strips 3X are alternately provided. Further, the plurality of twisted strips 3X have the same twisting shape as each other.
  • the twisted shape and twisting direction of the plurality of twisted strips 3X may be different from each other. Further, the lengths of the twisted strips 3X and the flat strips 3Y may be different from each other, the lengths of the twisted strips 3X may be different from each other, or the flat strips 3Ys may be different from each other. The lengths may be different from each other.
  • the rising joint portion 4 is provided at the free end portion 3a of the strip-shaped portion 3.
  • the rising joint portion 4 is joined to the heat transfer member, whereby the free end portion 3a of the strip-shaped portion 3 is fixed.
  • the rising joint portion 4 of the present embodiment is provided at the same height position as the fin main body portion 2.
  • the rising joint portion 4 may be provided at a height position different from that of the fin main body portion 2.
  • the rising joint portion 4 has a first joint end portion 41 joined to one heat transfer member, a second joint end portion 42 to the other heat transfer member, and a first joint. It has a connecting portion 43 that connects the end portion 41 and the second joint end portion 42.
  • the connecting portion 43 is integrally formed with the free end portion 3a of the strip-shaped portion 3.
  • the rising joint 4 shown in FIG. 3 has a Z-shaped cross section, but as shown in ⁇ Modification 1> of FIG. 3, for example, it may have a U-shaped cross section. , As shown in ⁇ Modification 2> of FIG. 3, the cross section may be S-shaped. Further, the rising joint portion 4 may be provided on all the strip-shaped portions 3, or may be provided on either the twisted strip-shaped portion 3X or the flat plate strip-shaped portion 3Y.
  • the heat transfer fin 100 configured in this way basically has a rectangular shape in a plan view, but as shown in FIG. 4, it can also be deformed into a curved shape in a plan view. That is, instead of arranging the plurality of side wall portions 23 and / or the plurality of strip-shaped portions 3 of the fin main body portion 2 in parallel, the free end portions 3a of the plurality of side wall portions 23 and / or the plurality of strip-shaped portions 3 are expanded and contracted with each other.
  • the heat transfer fin 100 can be formed into a curved shape.
  • one metal plate is cut into a shape having a portion to be a fin main body portion and a plurality of strip-shaped portions (including a portion to be a rising joint portion 4).
  • the cut metal plate is bent to form a corrugated fin body 2.
  • a band-shaped portion 3 extending from one side of each of the plurality of side wall portions 23 is formed.
  • the strip-shaped portion has the same flat plate shape as the side wall portion 23.
  • the twisted strip-shaped portion 3X is formed.
  • a constricted portion 3K narrowed vertically is provided at the connecting portion between the side wall portion 23 of the fin main body portion 2 and the strip-shaped portion 3.
  • the rising joint portion 4 may be formed by bending a metal plate before forming the fin main body 2, or may be formed by bending the metal plate after forming the fin main body 2, or twisting. After forming the strip-shaped portion 3X, the metal plate may be bent to form the strip-shaped portion 3X.
  • the heat transfer fin 100 of the present embodiment since the strip-shaped portion 3 provided on the side wall portion 23 of the fin main body portion 2 has a twisted shape, the fluid passing through the heat transfer fin 100 has a twisted shape of the strip-shaped portion 3. Along the flow, the fluid is agitated and flows in a laminar flow or a state close to a laminar flow without generating a useless vortex. When the agitated fluid hits the heat transfer member, the boundary film between the heat transfer member provided with the heat transfer fins and the fluid becomes thin, and the thermal resistance thereof can be reduced. As a result, it is possible to improve the heat exchange efficiency between the heat transfer member and the fluid while suppressing the increase in pressure loss due to the heat transfer fin 100. Further, since heat transfer does not rely on fine shapes such as pinching pitch of corrugated fins and unevenness as in the conventional case, it is possible to prevent performance deterioration due to clogging of foreign substances such as dust.
  • the heat transfer fin 100 of the above embodiment has a configuration having a rising joint portion 4, but as shown in FIG. 5, it may be configured not to have a rising joint portion 4.
  • strip-shaped portion 3 of the above embodiment is integrally formed with the side wall portion 23, the fin main body portion 2 and the strip-shaped portion 3 are separate parts, and the strip-shaped portion 3 is formed on the fin main body portion 2, for example. It may be joined by brazing or welding.
  • the heat transfer fin 100 is provided with the strip-shaped portion 3 on one side of the side wall portion 23.
  • the strip-shaped portion 3 is extended from both sides of the side wall portion 23. May be provided.
  • the strip-shaped portion 3 provided on one side of the side wall portion 23 and the strip-shaped portion 3 provided on the other side of the side wall portion 23 do not have to have the same shape, and have, for example, different lengths and twisted shapes. They may have different shapes such as different shapes.
  • the twisted band-shaped portions 3X provided on both sides of the plurality of side wall portions 23 may be provided so as to be staggered with respect to the fin main body portion 2.
  • FIG. 7 shows the simulation results of the heat exchange performance of the heat transfer fins of the present invention and the conventional heat transfer fins.
  • each heat transfer fin was joined to the heat source surface, and the heat exchange amount (W) and pressure loss (Pa) of the heat source surface when air was passed through the heat transfer fins were obtained.
  • the heat transfer fin of the present invention is a heat transfer fin provided by extending the band-shaped portion 3 as shown in FIG. 7 from both sides of the side wall portion 23. Further, all the conventional heat transfer fins are corrugated fins.
  • the heat transfer fin of the present invention can reduce the pressure loss while increasing the amount of heat exchange on the heat source surface.
  • the twisted strips 3X are provided every other time, but as shown in FIG. 8, all the strips 3 may be twisted strips 3X. Further, the twisted strip 3X may be provided in another arrangement.
  • a corrugated second fin main body portion 5 having a top portion and a valley portion connected by a side wall portion may be connected to the free end portion 3a of the plurality of strip-shaped portions 3. .. That is, the side wall portion 23 of the fin main body portion (first fin main body portion 2) of the embodiment and the side wall portion of the second fin main body portion 5 are connected by the band-shaped portion 3. Further, the strip-shaped portion 3 may be extended from the side wall portion of the second fin main body portion 5 to the side opposite to the first fin main body portion 2.
  • top and valley portions are connected by the side wall portions to the free end portion 3a of the strip-shaped portion 3 extending from the side wall portion of the second fin main body portion 5 to the side opposite to the first fin main body portion 2.
  • a corrugated third fin body 6 may be connected. That is, a configuration may be configured in which two or more fin main bodies are connected by a band-shaped portion 3. In this configuration, both ends of the strip 3 are fixed ends, so when forming a twisted shape of the strip 3, for example, the intermediate portion of the strip 3 is rotated around the central axis of the strip 3. Let me. At this time, the strip-shaped portion 3 is formed with two twisted shapes having different twisting directions.
  • a rising surface 3Y1 for strengthening the joint may be provided on at least one of the upper end portion and the lower end portion of the flat plate strip-shaped portion 3Y.
  • FIG. 8 illustrates a case where the rising surface 3Y1 is provided on both the upper end portion and the lower end portion of the flat plate strip-shaped portion 3Y.
  • FIG. 10 shows a main part (part) of the EGR heat exchanger 200 configured by using the heat transfer fins 100.
  • a heat transfer fin 100 is provided in a heat transfer case 201 having an internal space having a rectangular cross section to form a heat transfer unit 202.
  • the heat transfer case 201 has a flat rectangular parallelepiped shape with openings on both end faces.
  • the heat transfer units 202 are stacked in a plurality of stages so as to leave a gap between them, and surrounded by a housing 203 for circulating the cooling liquid on the outside and the gap, thereby forming the EGR heat exchanger 200.
  • the housing 203 is provided with a coolant introduction port P1 for introducing the coolant and a coolant outlet port P2 for leading the coolant. Then, when high-temperature exhaust gas flows in from one end opening of the heat transfer case 201, heat is exchanged between the heat transfer case 201 and the coolant by the heat transfer fin 100, and the cooled exhaust gas flows out from the other end opening.
  • FIG. 11 shows a main part (part) of the radiator 300 configured by using the heat transfer fins 100.
  • the radiator 300 has a plurality of flat tubes 301 through which the cooling liquid flows, and heat transfer fins 100 provided between the flat tubes 301. Both ends of the plurality of flat pipes 301 are connected to the header 302, one header 302 is provided with a coolant introduction port P1, and the other header 302 is provided with a coolant outlet port P2. Has been done. Then, air flows through the heat transfer fins 100 provided between the flat tubes 301, so that the high-temperature coolant into which the coolant introduction port P1 is introduced is between the flat tubes 301 and the air by the heat transfer fins 100. The low-temperature coolant is led out from the coolant outlet port P2 by heat exchange at.
  • FIG. 12 shows a main part (part) of the heat exchanger 400 in which the heat transfer fins 100 are wound around the outer peripheral surface of the coolant storage pipe 401 for storing the coolant.
  • the heat exchanger 400 has a double pipe structure, and an outer pipe 402 is provided outside the coolant storage pipe 401. Then, a heat transfer fin 100 bent in a cylindrical shape is provided between the coolant storage pipe 401 and the outer pipe 402.
  • the coolant storage pipe 401 is provided with a coolant introduction port P1 for introducing the coolant and a coolant outlet port P2 for leading out the coolant. Further, both ends of the outer tube 402 are open, and the air flowing in from one opening passes through the heat transfer fin 100 and flows out from the other opening.
  • the heat transfer fin 100 of the present invention can be used in various types of heat exchangers.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention supprime une augmentation de la perte de pression, et améliore l'efficacité de transmission de chaleur. La présente invention comprend : une partie corps d'ailette (2) qui a une forme ondulée et qui est formée en reliant des parties de crête (21) et des parties de vallée (22) avec des parties de paroi latérale (23) ; et des parties en forme de courroie (3) qui s'étendent à partir d'un ou des deux côtés de chacune de la pluralité de parties de paroi latérale (23). Au moins l'une de la pluralité de parties en forme de courroie (3) a une forme torsadée.
PCT/JP2020/033772 2019-09-18 2020-09-07 Ailette de transfert de chaleur et son procédé de fabrication WO2021054173A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021546615A JPWO2021054173A1 (fr) 2019-09-18 2020-09-07

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019169572 2019-09-18
JP2019-169572 2019-09-18

Publications (1)

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WO2021054173A1 true WO2021054173A1 (fr) 2021-03-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58213195A (ja) * 1982-06-04 1983-12-12 Ishikawajima Harima Heavy Ind Co Ltd プレ−トフイン型熱交換器
JP2001050678A (ja) * 1999-08-09 2001-02-23 Tokyo Radiator Mfg Co Ltd 熱交換器
JP2007278571A (ja) * 2006-04-05 2007-10-25 Denso Corp 伝熱部材およびそれを用いた熱交換器
JP2009139085A (ja) * 2007-12-04 2009-06-25 Valeo Systemes Thermiques 熱交換器用ルーバ式波型インサート
JP2009204279A (ja) * 2008-02-29 2009-09-10 Nippon Light Metal Co Ltd 熱交換器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58213195A (ja) * 1982-06-04 1983-12-12 Ishikawajima Harima Heavy Ind Co Ltd プレ−トフイン型熱交換器
JP2001050678A (ja) * 1999-08-09 2001-02-23 Tokyo Radiator Mfg Co Ltd 熱交換器
JP2007278571A (ja) * 2006-04-05 2007-10-25 Denso Corp 伝熱部材およびそれを用いた熱交換器
JP2009139085A (ja) * 2007-12-04 2009-06-25 Valeo Systemes Thermiques 熱交換器用ルーバ式波型インサート
JP2009204279A (ja) * 2008-02-29 2009-09-10 Nippon Light Metal Co Ltd 熱交換器

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