WO2013076907A1 - Fin-tube type heat exchanger - Google Patents

Fin-tube type heat exchanger Download PDF

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Publication number
WO2013076907A1
WO2013076907A1 PCT/JP2012/006625 JP2012006625W WO2013076907A1 WO 2013076907 A1 WO2013076907 A1 WO 2013076907A1 JP 2012006625 W JP2012006625 W JP 2012006625W WO 2013076907 A1 WO2013076907 A1 WO 2013076907A1
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WO
WIPO (PCT)
Prior art keywords
heat transfer
fin
fin collar
collar
tube
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PCT/JP2012/006625
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French (fr)
Japanese (ja)
Inventor
横山　昭一
道人 尾崎
薫 細川
Original Assignee
パナソニック株式会社
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Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2013545763A priority Critical patent/JP5988177B2/en
Priority to KR1020147005248A priority patent/KR20140103895A/en
Priority to CN201280042312.8A priority patent/CN103765148B/en
Publication of WO2013076907A1 publication Critical patent/WO2013076907A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • 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
    • 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
    • F28F2215/00—Fins

Definitions

  • the present invention relates to a finned tube heat exchanger that transfers heat between a gas such as air flowing between a plurality of stacked flat fins and a fluid such as water or refrigerant flowing in a heat transfer tube.
  • a finned tube heat exchanger used in air conditioners such as room air conditioners, packaged air conditioners, and car air conditioners, heat pump hot water heaters, refrigerators, freezers, and the like.
  • heat exchangers incorporated in air conditioners such as room air conditioners and refrigerators are fin-tube heat exchangers.
  • FIG. 4 is a partial cross-sectional schematic front view for explaining a general finned tube heat exchanger 1.
  • the fin tube type heat exchanger 1 has a plurality of heat transfer fins 31 arranged in parallel with each other at a predetermined interval, and a substantially cylindrical shape provided so as to rise substantially orthogonal to the plane of the heat transfer fins 31.
  • the heat transfer tube 33 is expanded and brought into close contact with the fin collar. Heat is exchanged between the heat transfer tubes 33 and the heat transfer fins 31 through the heat transfer tubes 33 and the heat transfer fins 31 by flowing water or refrigerant into the heat transfer tubes 33.
  • the fin tube type heat exchanger 1 is generally manufactured by the following process.
  • a thin plate made of aluminum or aluminum alloy is pressed to form the heat transfer fin 31 having a substantially cylindrical fin collar that rises substantially perpendicular to the plane of the thin plate.
  • the heat transfer tube 33 made of copper or copper alloy is bent into a U shape to form a hairpin shape.
  • a plurality of the heat transfer fins 31 are stacked in parallel, and the heat transfer tube 33 is passed through the connected fin collars.
  • the outer surface of the heat transfer tube 33 and the inner surface of the fin collar are brought into close contact with each other, and the heat transfer tube 33 is fixed to the heat transfer fin 31.
  • the open end of the heat transfer tube 33 is expanded, the U bend tube 35 is inserted, and the heat transfer tube 33 is communicated by brazing.
  • Factors that affect the heat transfer performance of the finned tube heat exchanger include the heat transfer coefficient between the heat transfer tube 33 and a fluid such as water or refrigerant flowing through the heat transfer tube 33, and between the heat transfer tube and the fin collar.
  • the contact heat resistance of the heat transfer fin 31, the fin efficiency due to the heat conduction of the heat transfer fins 31, and the heat transfer coefficient between the air and the heat transfer fins 31 are known.
  • the contact thermal resistance between the heat transfer tube 33 and the fin collar is affected by the degree of adhesion between the heat transfer tube 33 and the fin collar.
  • FIG. 5 is a cross-sectional view of the main part of the fin collar of a conventional fin tube type heat exchanger.
  • the fin collar 102 of the heat transfer fin 101 in the fin tube type heat exchanger has a flange portion 103 having an arc-shaped cross section at the tip, and a radial direction of the fin collar 102 at the root.
  • An R portion 104 having a hem extending outward is provided. Therefore, even if the heat transfer fins 101 are stacked and the heat transfer tube 105 is inserted into the fin collar 102 and expanded, a gap space 107 that cannot be brought into close contact with the fin collar 102 is generated, which causes a deterioration in contact thermal resistance. It has become.
  • heat transfer fin material when aluminum or aluminum alloy is used as the heat transfer fin material and copper or copper alloy is used as the heat transfer tube material, when the heat transfer tube is expanded and fixed to the fin collar, the fin collar is plastically deformed. Thus, the hole diameter after tube expansion is maintained.
  • the heat transfer tube having a larger elastic coefficient is slightly reduced in diameter after the expansion, and a slight gap is formed between the heat transfer tube and the fin. It is considered that the performance loss (heat resistance) of the heat exchanger due to the gap is about 5% of the entire heat exchanger (see Non-Patent Document 1, for example).
  • FIG. 6 is a cross-sectional view of a main part of a fin collar of another conventional fin tube type heat exchanger.
  • a heat conductive fine powder such as an organic coating or metal powder is provided in the gap space or the gap 107.
  • Patent Documents 1-6 a technique (see Patent Documents 1-6) has been proposed in which a gap 108 or a gap is filled with a paint, resin, or the like.
  • Patent Document 7 a technique (see Patent Document 7) in which a heat transfer tube and a fin are brought into close contact with each other by heating and melting a low melting point non-metallic material without expanding the heat transfer tube.
  • the technique (refer patent document 8) which adheres a heat exchanger tube and a fin with an adhesive agent is also proposed.
  • FIG. 7 is a cross-sectional view of the main part of the fin collar of a further conventional fin tube type heat exchanger.
  • the fin described in Patent Document 9 shown in FIG. 7 it is intended to prevent the deterioration of the adhesion between the fin collar and the heat transfer tube by causing an Abeck phenomenon in which adjacent fins come into contact with each other at the time of tube expansion. The purpose is to improve sex.
  • the fin described in Patent Document 9 has a configuration in which a projecting portion 32 is provided by projecting a part of the flat surface portion 22 near the root R portion of the fin collar 26.
  • the radius of the arc shape of the cross section of the flange portion at the tip of the fin collar and the radius of the arc shape of the cross section of the R portion at the base of the fin collar are the same as those of the heat transfer fin at the time of pressing the fin collar. It cannot be reduced due to material elongation constraints. This also has the problem that there is a limit to the reduction of contact thermal resistance.
  • the gap space itself generated between the flange portion at the tip of the fin collar and the root R portion cannot be reduced.
  • the present invention solves the above-mentioned conventional problems, increases the area where the heat transfer tube and the fin collar part are in direct contact, reduces the contact heat resistance by improving the adhesion between the heat transfer tube and the fin, and heat exchange
  • An object of the present invention is to provide a finned tube heat exchanger capable of improving performance.
  • the finned tube heat exchanger of the present invention is A plurality of heat transfer fins laminated substantially in parallel at a predetermined interval; A plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially orthogonal to the planar direction of the heat transfer fins; A substantially cylindrical fin collar extending in a direction substantially orthogonal to the planar direction of the heat transfer fin is formed around a through hole of the heat transfer fin through which the heat transfer pipe passes. A finned tube heat exchanger that is inserted into the through hole in close contact with the heat transfer fin and exchanges heat between the gas flowing in the plane direction of the heat transfer fin and the refrigerant flowing inside the heat transfer tube.
  • the fin collar has a flange portion having an arc-shaped cross section at the tip, and a depressed portion recessed in a direction opposite to the rising direction of the fin collar from a peripheral fin plane connected to the fin collar at the root,
  • the cross-sectional shape of the depressed portion of the fin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the fin collar of the adjacent heat transfer fin.
  • the finned tube heat exchanger of the present invention can reduce the gap space formed between the flange portion at the tip of the fin collar and the R portion at the base.
  • the contact area between the heat transfer tube and the fin collar can be increased, and the contact heat resistance can be reduced to improve the heat transfer between the heat transfer tube and the heat transfer fin, thereby improving the heat exchange performance. be able to.
  • Sectional drawing of the fin collar principal part of the finned-tube type heat exchanger in Embodiment 1 of this invention 1 is an enlarged cross-sectional view of the main part of the fin collar of FIG.
  • Sectional drawing of the fin collar principal part of the finned-tube type heat exchanger in Embodiment 2 of this invention Partial cross-sectional schematic front view for explaining a general fin tube heat exchanger Sectional view of the fin collar main part of a conventional fin tube type heat exchanger Sectional drawing of the fin collar main part of another conventional fin tube type heat exchanger Sectional drawing of the fin collar principal part of the fin tube type heat exchanger of another conventional example
  • the finned tube heat exchanger is: A plurality of heat transfer fins laminated substantially in parallel at a predetermined interval; A plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially orthogonal to the planar direction of the heat transfer fins; A substantially cylindrical fin collar extending in a direction substantially orthogonal to the planar direction of the heat transfer fin is formed around a through hole of the heat transfer fin through which the heat transfer pipe passes.
  • a finned tube heat exchanger that is inserted into the through hole in close contact with the heat transfer fin and exchanges heat between the gas flowing in the plane direction of the heat transfer fin and the refrigerant flowing inside the heat transfer tube.
  • the fin collar has a flange portion having an arc-shaped cross section at the tip, and a depressed portion recessed in a direction opposite to the rising direction of the fin collar from a peripheral fin plane connected to the fin collar at the root,
  • the cross-sectional shape of the depressed portion of the fin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the fin collar of the adjacent heat transfer fin. Yes.
  • a gap space formed between the flange portion at the tip of the fin collar and the R portion at the base can be reduced, and the contact area between the heat transfer tube and the fin collar can be increased.
  • the contact heat resistance can be reduced and the heat transfer between the heat transfer tubes and the heat transfer fins can be improved, the heat exchange performance can be improved.
  • the finned-tube heat exchanger according to the second aspect of the present invention is particularly substantially circular provided in the rising direction of the fin collar so as to surround the fin collar in the configuration of the first aspect. And a diameter of the substantially circular protruding portion is set to be equal to or larger than a diameter of the outermost edge of the flange portion at the tip of the fin collar.
  • FIG. 1 is a cross-sectional view of the main part of the fin collar of the finned tube heat exchanger 200 according to the first embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view of the main part of the fin collar of A of FIG.
  • a finned tube heat exchanger 200 in the first embodiment shown in FIG. 1 includes a plurality of heat transfer fins 201 and a plurality of heat transfer tubes 205.
  • a substantially cylindrical fin collar 202 is formed around the through hole 208 of the heat transfer fin 201 through which the heat transfer tube 205 passes.
  • the fin collar 202 of the finned tube heat exchanger 200 according to the first embodiment will be described in detail.
  • the fin collar 202 has a flange 203 having an arcuate cross section at the tip, and a fin collar 202 rising direction from a peripheral fin plane 206 connected to the fin collar 202 at the root of the fin collar 202. And a depressed portion 204 that is recessed in the opposite direction.
  • the cross-sectional shape of the recessed portion 204 at the base of the fin collar 202 is an arc shape that roughly follows the shape of the flange portion 203 at the tip of the fin collar 202 of the adjacent heat transfer fin 201. Is formed.
  • the fin collar 202 is raised from a flange portion 203 having an arcuate cross section at the tip and a peripheral fin plane 206 connected to the fin collar 202 at the root of the fin collar 202. It has a depression 204 that is recessed in the opposite direction.
  • the cross-sectional shape of the recessed portion 204 at the base of the fin collar 202 is an arc shape that roughly follows the shape of the flange portion 203 at the tip of the fin collar 202 of the adjacent heat transfer fin 201. Is formed.
  • the gap space 207 formed between the R portion of the flange portion 203 at the tip of the fin collar 202 and the R shape of the root depressed portion 204 can be reduced.
  • the heat transfer tube 205 inserted into the fin collar 202 is expanded, the contact area between the heat transfer tube 205 and the fin collar 202 can be increased.
  • the contact heat resistance can be reduced and the heat transfer between the heat transfer tubes 205 and the heat transfer fins 201 can be improved, the heat exchange performance can be improved.
  • the finned tube heat exchanger 200 does not require materials other than the heat transfer tubes 205 and the heat transfer fins 201, and thus does not impair the recyclability at the time of product disposal.
  • FIG. 3 is a cross-sectional view of the main part of the fin collar of the finned tube heat exchanger 200a according to the second embodiment of the present invention.
  • the fin tube type heat exchanger 200a according to the second embodiment has a protrusion 209 provided on the fin collar 202a as compared with the fin tube type heat exchanger 200 according to the first embodiment described above. Is different.
  • the other configurations are the same as those of the finned tube heat exchanger 200 of the first embodiment.
  • the fin collar 202a of the finned tube heat exchanger 200a according to the second embodiment will be described in detail.
  • the fin collar 202a is similar to the first embodiment in that a fin collar 202 is formed from a flange portion 203 having an arcuate cross section at the tip and a peripheral fin plane 206 connected to the fin collar 202a at the root of the fin collar 202a. It has a depression 204 that is recessed in the direction opposite to the rising direction of 202a.
  • the cross-sectional shape of the recess 204 at the base of the fin collar 202a is an arc shape that roughly follows the shape of the flange portion 203 at the tip of the fin collar 202a of the adjacent heat transfer fin 201a. Is formed.
  • a substantially circular protrusion 209 is provided in the rising direction of the fin collar 202a so as to surround the fin collar 202a.
  • the diameter of the substantially circular protrusion 209 is formed to be equal to or greater than the diameter of the outermost edge of the flange 203 at the tip of the fin collar 202a.
  • a substantially circular protruding portion 209 is provided in the rising direction of the fin collar 202a so as to surround the fin collar 202a.
  • the diameter of the substantially circular protrusion 209 is formed to be equal to or greater than the diameter of the outermost edge of the flange 203 at the tip of the fin collar 202a.
  • the fin tube type heat exchanger has a fin collar standing up from a flange portion having an arcuate cross section at the tip of the fin collar and a surrounding fin plane connected to the fin collar at the root of the fin collar. It has a depression that is recessed in the direction opposite to the raising direction.
  • the cross-sectional shape of the depressed portion at the base of the fin collar is formed in an arc shape that roughly follows the shape of the flange portion at the tip of the fin collar of the adjacent heat transfer fin. Therefore, the gap space formed between the flange portion at the tip of the fin collar and the R portion at the base can be reduced.
  • the contact area between the heat transfer tube and the fin collar can be increased, and the contact heat resistance can be reduced to improve the heat transfer between the heat transfer tube and the heat transfer fin.
  • it is possible to improve the heat exchange performance, so that it can be applied not only to various air conditioners, refrigerators, and freezers, but also to uses such as heat pump water heaters and gas water heaters.

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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

In the present invention, at the root of fin collars there are depressions that are depressed in the direction opposite the rising direction of the fin collars. The cross-sectional shape of the depressions at the root of the fin collars is formed so as to be a circular arc that roughly follows the flange shape of a tip of the adjacent fin collar, and as a result, gaps are reduced and the contact surface area between a heat transfer pipe and the fin collars can be increased. Due to the foregoing, contact heat resistance is reduced, heat transfer between the heat transfer pipe and a heat transfer fin is improved, and heat exchange capabilities are improved.

Description

フィンチューブ型熱交換器Finned tube heat exchanger
　本発明は、多数積層された平板状のフィンの間を流動する空気などの気体と伝熱管内を流動する水や冷媒などの流体との間で熱を授受するフィンチューブ型熱交換器に関する。特に、ルームエアコン、パッケージエアコン、カーエアコン等の空気調和機や、ヒートポンプ式給湯機、冷蔵庫、冷凍庫等に用いられるフィンチューブ型熱交換器に関する。 The present invention relates to a finned tube heat exchanger that transfers heat between a gas such as air flowing between a plurality of stacked flat fins and a fluid such as water or refrigerant flowing in a heat transfer tube. In particular, the present invention relates to a finned tube heat exchanger used in air conditioners such as room air conditioners, packaged air conditioners, and car air conditioners, heat pump hot water heaters, refrigerators, freezers, and the like.
　ルームエアコン等の空気調和機や冷蔵庫等に組み込まれる熱交換器の大半は、フィンチューブ型熱交換器である。 Most of the heat exchangers incorporated in air conditioners such as room air conditioners and refrigerators are fin-tube heat exchangers.
　図４は、一般的なフィンチューブ型熱交換器１を説明するための部分断面概略正面図である。 FIG. 4 is a partial cross-sectional schematic front view for explaining a general finned tube heat exchanger 1.
　フィンチューブ型熱交換器１は、所定の間隔で相互に平行に配列された複数の伝熱フィン３１と、前記伝熱フィン３１の平面に略直交して立ち上がるように設けられた略円筒状のフィンカラーに拡管密着された伝熱管３３により構成されている。そして、この伝熱管３３の内部に水や冷媒を流すことにより、前記伝熱管３３および前記伝熱フィン３１を介して、外部の空気との間で熱交換が行われる。 The fin tube type heat exchanger 1 has a plurality of heat transfer fins 31 arranged in parallel with each other at a predetermined interval, and a substantially cylindrical shape provided so as to rise substantially orthogonal to the plane of the heat transfer fins 31. The heat transfer tube 33 is expanded and brought into close contact with the fin collar. Heat is exchanged between the heat transfer tubes 33 and the heat transfer fins 31 through the heat transfer tubes 33 and the heat transfer fins 31 by flowing water or refrigerant into the heat transfer tubes 33.
　このフィンチューブ型熱交換器１は、一般に次のような工程で製造される。 The fin tube type heat exchanger 1 is generally manufactured by the following process.
　初めに、アルミニウムまたはアルミニウム合金製などの薄板をプレス加工し、前記薄板の平面に略直交して立ち上がる略円筒状のフィンカラーを有する前記伝熱フィン３１を形成する。次に、銅または銅合金製などの前記伝熱管３３をＵ字型に曲げ加工し、ヘアピン状にする。そして、複数の前記伝熱フィン３１を平行に積層し、連接した前記フィンカラーに前記伝熱管３３を通す。さらに、前記伝熱管３３を適当な方法で拡管することにより、前記伝熱管３３の外面と前記フィンカラーの内面が密着し、前記伝熱管３３が前記伝熱フィン３１に固定される。最後に、前記伝熱管３３の開放端を拡管してＵベンド管３５を差し込み、ろう付けすることにより、前記伝熱管３３を連通させる。 First, a thin plate made of aluminum or aluminum alloy is pressed to form the heat transfer fin 31 having a substantially cylindrical fin collar that rises substantially perpendicular to the plane of the thin plate. Next, the heat transfer tube 33 made of copper or copper alloy is bent into a U shape to form a hairpin shape. A plurality of the heat transfer fins 31 are stacked in parallel, and the heat transfer tube 33 is passed through the connected fin collars. Furthermore, by expanding the heat transfer tube 33 by an appropriate method, the outer surface of the heat transfer tube 33 and the inner surface of the fin collar are brought into close contact with each other, and the heat transfer tube 33 is fixed to the heat transfer fin 31. Finally, the open end of the heat transfer tube 33 is expanded, the U bend tube 35 is inserted, and the heat transfer tube 33 is communicated by brazing.
　近年、空気調和機や冷蔵庫等においても、エネルギー消費効率の大幅な向上が求められている。このため、これらの機器に組み込まれるフィンチューブ型熱交換器は、伝熱性能を向上させることが要求されている。 In recent years, there has been a demand for significant improvement in energy consumption efficiency in air conditioners and refrigerators. For this reason, fin-tube heat exchangers incorporated in these devices are required to improve heat transfer performance.
　フィンチューブ型熱交換器の伝熱性能に影響を与える因子としては、前記伝熱管３３とその内部を流れる水や冷媒などの流体の間の熱伝達率、前記伝熱管と前記フィンカラーとの間の接触熱抵抗、前記伝熱フィン３１の熱伝導によるフィン効率および空気と前記伝熱フィン３１との間の熱伝達率が知られている。 Factors that affect the heat transfer performance of the finned tube heat exchanger include the heat transfer coefficient between the heat transfer tube 33 and a fluid such as water or refrigerant flowing through the heat transfer tube 33, and between the heat transfer tube and the fin collar. The contact heat resistance of the heat transfer fin 31, the fin efficiency due to the heat conduction of the heat transfer fins 31, and the heat transfer coefficient between the air and the heat transfer fins 31 are known.
　前記伝熱管３３とその内部を流れる流体との間の熱伝達率向上には、管内の沸騰熱伝達、凝縮熱伝達あるいは対流熱伝達の促進が有効であるため、前記伝熱管３３の内表面積の増加及び冷媒の撹拌効果を増大させる最適な内面溝形状の開発が進められている。 In order to improve the heat transfer coefficient between the heat transfer tube 33 and the fluid flowing through the heat transfer tube 33, it is effective to promote boiling heat transfer, condensation heat transfer, or convection heat transfer in the tube. The development of an optimal inner groove shape that increases and increases the stirring effect of the refrigerant is underway.
　また、空気と前記伝熱フィン３１との間の熱伝達率を向上させる手段としては、前記伝熱フィン３１の表面に空気の温度境界層の形成を抑制するための起伏を設けたり、スリットまたはルーバーと呼ばれる切り起こしを設けたりする方法が開発されている。これらの起伏およびスリットまたはルーバーの寸法、形状の最適化が進められている。また、フィン効率は、前記伝熱フィン３１の板厚と熱伝導率、そして前記伝熱管３３の直径と配列によって一義的に定まるので、それらに留意した設計が行われている。 Further, as means for improving the heat transfer coefficient between air and the heat transfer fins 31, undulations for suppressing the formation of a temperature boundary layer of air are provided on the surface of the heat transfer fins 31, slits or A method of creating a cut-up called a louver has been developed. Optimization of the size and shape of these undulations and slits or louvers is underway. Further, the fin efficiency is uniquely determined by the plate thickness and thermal conductivity of the heat transfer fins 31 and the diameter and arrangement of the heat transfer tubes 33, and therefore, the design is performed in consideration of them.
　一方、前記伝熱管３３と前記フィンカラーとの間の接触熱抵抗は、前記伝熱管３３と前記フィンカラーの密着度合いに影響される。 On the other hand, the contact thermal resistance between the heat transfer tube 33 and the fin collar is affected by the degree of adhesion between the heat transfer tube 33 and the fin collar.
　図５は、従来の一例のフィンチューブ型熱交換器のフィンカラー要部の断面図である。図５に示すように一般に、フィンチューブ型熱交換器における伝熱フィン１０１のフィンカラー１０２は、先端に断面が円弧状のフランジ部１０３を有し、根元には前記フィンカラー１０２の半径方向の外側に裾が広がるＲ部１０４を有する。そのため、前記伝熱フィン１０１を積層して、前記フィンカラー１０２に伝熱管１０５を挿入し、拡管しても、前記フィンカラー１０２に密着できない隙間空間１０７が生じるため、接触熱抵抗を悪化させる原因となっている。 FIG. 5 is a cross-sectional view of the main part of the fin collar of a conventional fin tube type heat exchanger. As shown in FIG. 5, generally, the fin collar 102 of the heat transfer fin 101 in the fin tube type heat exchanger has a flange portion 103 having an arc-shaped cross section at the tip, and a radial direction of the fin collar 102 at the root. An R portion 104 having a hem extending outward is provided. Therefore, even if the heat transfer fins 101 are stacked and the heat transfer tube 105 is inserted into the fin collar 102 and expanded, a gap space 107 that cannot be brought into close contact with the fin collar 102 is generated, which causes a deterioration in contact thermal resistance. It has become.
　また、例えば、伝熱フィンの材料としてアルミニウムまたはアルミニウム合金を用い、伝熱管の材料として銅または銅合金を用いた場合、伝熱管を拡管してフィンカラーに固定する際、フィンカラーは、塑性変形して拡管後の孔径を維持する。これに対し、より弾性係数の大きい伝熱管は、拡管後に僅かに縮径して、フィンとの間に僅かな空隙部を形成することが分かっている。この空隙部による熱交換器の性能の損失（熱抵抗）は、熱交換器全体の５％程度であると考えられている（例えば、非特許文献１参照。）。 Also, for example, when aluminum or aluminum alloy is used as the heat transfer fin material and copper or copper alloy is used as the heat transfer tube material, when the heat transfer tube is expanded and fixed to the fin collar, the fin collar is plastically deformed. Thus, the hole diameter after tube expansion is maintained. On the other hand, it has been found that the heat transfer tube having a larger elastic coefficient is slightly reduced in diameter after the expansion, and a slight gap is formed between the heat transfer tube and the fin. It is considered that the performance loss (heat resistance) of the heat exchanger due to the gap is about 5% of the entire heat exchanger (see Non-Patent Document 1, for example).
　図６は、従来の別の一例のフィンチューブ型熱交換器のフィンカラー要部の断面図である。図６に示すように、隙間空間や空隙部１０７を少なくして、熱交換器の伝熱性能を向上させるため、隙間空間や空隙部１０７に、有機被膜、金属粉末等の熱伝導性微粉末、塗料、樹脂などを充填して隙間空間や空隙部を埋める構成１０８とする技術（特許文献１－６参照。）が提案されている。他にも伝熱管を拡管せずに低融点の非金属材料を加熱融解することにより、伝熱管とフィンとを密着させる技術（特許文献７参照。）が提案されている。また、接着剤で伝熱管とフィンとを密着させる技術（特許文献８参照。）も提案されている。 FIG. 6 is a cross-sectional view of a main part of a fin collar of another conventional fin tube type heat exchanger. As shown in FIG. 6, in order to improve the heat transfer performance of the heat exchanger by reducing the gap space and the gap 107, a heat conductive fine powder such as an organic coating or metal powder is provided in the gap space or the gap 107. In addition, a technique (see Patent Documents 1-6) has been proposed in which a gap 108 or a gap is filled with a paint, resin, or the like. In addition, there has been proposed a technique (see Patent Document 7) in which a heat transfer tube and a fin are brought into close contact with each other by heating and melting a low melting point non-metallic material without expanding the heat transfer tube. Moreover, the technique (refer patent document 8) which adheres a heat exchanger tube and a fin with an adhesive agent is also proposed.
　図７は、従来のさらに別の一例のフィンチューブ型熱交換器のフィンカラー要部の断面図である。図７に示す特許文献９に記載のフィンでは、隣接するフィン同士が拡管時に接触するアベック現象を起こし、フィンカラーと伝熱管との密着性が悪くなるのを防止することを狙い、フィンの積層性を良化させることを目的としている。この目的を達成するため、特許文献９に記載のフィンでは、フィンカラー２６の根元Ｒ部近傍の平面部２２の一部を突出させた突出部３２を設けた構成としている。 FIG. 7 is a cross-sectional view of the main part of the fin collar of a further conventional fin tube type heat exchanger. In the fin described in Patent Document 9 shown in FIG. 7, it is intended to prevent the deterioration of the adhesion between the fin collar and the heat transfer tube by causing an Abeck phenomenon in which adjacent fins come into contact with each other at the time of tube expansion. The purpose is to improve sex. In order to achieve this object, the fin described in Patent Document 9 has a configuration in which a projecting portion 32 is provided by projecting a part of the flat surface portion 22 near the root R portion of the fin collar 26.
特開昭５６－１３３５９５号公報JP-A-56-133595 特開昭５８－１５８４９３号公報JP 58-158493 A 特開平１０－１６０３７４号公報JP-A-10-160374 特開昭６０－１６２１９３号公報JP 60-162193 A 特許第３９８２７６８号公報Japanese Patent No. 398768 特開２０１０－１６９３４４号公報JP 2010-169344 A 特開昭５９－１５７９４号公報JP 59-15794 A 特開平９－１４５２８２号公報Japanese Patent Laid-Open No. 9-145282 特開平９－１１９７９２号公報Japanese Patent Laid-Open No. 9-119792
　しかしながら、前記従来の構成ではいずれも、前記伝熱フィンを積層したとき、前記フィンカラーの先端の断面が円弧状のフランジ部と、根元の断面が円弧状のＲ部との間に生じる隙間空間では、前記フィンカラーと前記伝熱管を直接接触させることができない。そのため、接触熱抵抗の低減に限界があるという課題を有していた。 However, in any of the conventional configurations, when the heat transfer fins are stacked, a gap space is generated between the flange portion having a circular cross section at the tip of the fin collar and the R portion having a circular cross section at the root. Then, the fin collar and the heat transfer tube cannot be brought into direct contact with each other. For this reason, there is a problem that there is a limit in reducing the contact thermal resistance.
　また、前記フィンカラーの先端の前記フランジ部の断面の円弧形状の半径や、前記フィンカラーの根元のＲ部の断面の円弧形状の半径は、前記フィンカラーのプレス加工時における前記伝熱フィンの材料の伸びの制約から、小さくすることができない。このことからも、接触熱抵抗の低減に限界があるという課題を有していた。 Further, the radius of the arc shape of the cross section of the flange portion at the tip of the fin collar and the radius of the arc shape of the cross section of the R portion at the base of the fin collar are the same as those of the heat transfer fin at the time of pressing the fin collar. It cannot be reduced due to material elongation constraints. This also has the problem that there is a limit to the reduction of contact thermal resistance.
　さらに、隙間空間に前記伝熱フィンや前記伝熱管と異なる材料を充填することは、製品廃棄時のリサイクル性を悪化させることとなる。 Furthermore, filling the gap space with a material different from the heat transfer fins or the heat transfer tubes deteriorates the recyclability when the product is discarded.
　また、フィンカラーの根元に突出部を設けて、フィンの積層性を良くする構成としても、フィンカラーの先端のフランジ部と根元のＲ部との間に生じる隙間空間そのものを低減させることはできない。 Further, even if a protrusion is provided at the base of the fin collar to improve the stackability of the fins, the gap space itself generated between the flange portion at the tip of the fin collar and the root R portion cannot be reduced. .
　本発明は、前記従来の課題を解決するもので、伝熱管とフィンカラー部が直接接触する面積を増大させ、伝熱管とフィンの密着性を向上させることで接触熱抵抗を低減し、熱交換性能を向上させることができるフィンチューブ型熱交換器を提供することを目的とする。 The present invention solves the above-mentioned conventional problems, increases the area where the heat transfer tube and the fin collar part are in direct contact, reduces the contact heat resistance by improving the adhesion between the heat transfer tube and the fin, and heat exchange An object of the present invention is to provide a finned tube heat exchanger capable of improving performance.
　前記従来の課題を解決するために、本発明のフィンチューブ型熱交換器は、
　所定の間隔を置いて略平行に積層された複数の伝熱フィンと、
　前記伝熱フィンの平面方向と略直交する方向に前記伝熱フィンを貫通する複数の伝熱管と、を備え、
　前記伝熱管が貫通する前記伝熱フィンの貫通孔の周囲には、前記伝熱フィンの平面方向に対し略直交する方向に延びる略円筒状のフィンカラーが形成され、前記伝熱管は前記フィンカラーに密着した状態で前記貫通孔に挿入され、前記伝熱フィンの平面方向に流れる気体と前記伝熱管の内部を流れる冷媒との間で熱交換を行うようにしたフィンチューブ型熱交換器であって、
　前記フィンカラーは、先端に断面が円弧状のフランジ部と、根元に前記フィンカラーに繋がる周囲のフィン平面から、前記フィンカラーの立ち上げ方向と反対方向に窪む陥没部と、を有し、
　前記フィンカラーの前記陥没部の断面形状は、前記伝熱フィンが積層されたとき、隣接する前記伝熱フィンの前記フィンカラーの前記フランジ部の形状に概略沿う円弧状となるように形成している。 In order to solve the conventional problem, the finned tube heat exchanger of the present invention is
A plurality of heat transfer fins laminated substantially in parallel at a predetermined interval;
A plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially orthogonal to the planar direction of the heat transfer fins;
A substantially cylindrical fin collar extending in a direction substantially orthogonal to the planar direction of the heat transfer fin is formed around a through hole of the heat transfer fin through which the heat transfer pipe passes. A finned tube heat exchanger that is inserted into the through hole in close contact with the heat transfer fin and exchanges heat between the gas flowing in the plane direction of the heat transfer fin and the refrigerant flowing inside the heat transfer tube. And
The fin collar has a flange portion having an arc-shaped cross section at the tip, and a depressed portion recessed in a direction opposite to the rising direction of the fin collar from a peripheral fin plane connected to the fin collar at the root,
When the heat transfer fins are stacked, the cross-sectional shape of the depressed portion of the fin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the fin collar of the adjacent heat transfer fin. Yes.
　これによって、前記フィンカラーの先端の前記フランジ部と前記根元のＲ部との間にできる隙間空間を小さくすることができる。また、前記伝熱管と前記フィンカラーの接触面積を増加させることができ、接触熱抵抗を低減して前記伝熱管と前記伝熱フィンとの間の伝熱を向上させることができるため、熱交換性能を向上させることができる。さらに、前記伝熱管と前記伝熱フィン以外の材料を必要としないため、製品廃棄時のリサイクル性を損なうこともない。 This makes it possible to reduce a gap space formed between the flange portion at the tip of the fin collar and the R portion at the base. In addition, the contact area between the heat transfer tube and the fin collar can be increased, and the heat transfer between the heat transfer tube and the heat transfer fin can be improved by reducing the contact heat resistance, so that heat exchange Performance can be improved. Furthermore, since materials other than the heat transfer tubes and the heat transfer fins are not required, the recyclability at the time of product disposal is not impaired.
　本発明のフィンチューブ型熱交換器は、フィンカラーの先端のフランジ部と根元のＲ部との間にできる隙間空間を小さくすることができる。また、伝熱管とフィンカラーの接触面積を増大させることができ、接触熱抵抗を低減して伝熱管と伝熱フィンとの間の伝熱を向上させることができるため、熱交換性能を向上させることができる。 The finned tube heat exchanger of the present invention can reduce the gap space formed between the flange portion at the tip of the fin collar and the R portion at the base. In addition, the contact area between the heat transfer tube and the fin collar can be increased, and the contact heat resistance can be reduced to improve the heat transfer between the heat transfer tube and the heat transfer fin, thereby improving the heat exchange performance. be able to.
本発明の実施の形態１におけるフィンチューブ型熱交換器のフィンカラー要部の断面図Sectional drawing of the fin collar principal part of the finned-tube type heat exchanger in Embodiment 1 of this invention 図１のＡのフィンカラー要部の拡大断面図1 is an enlarged cross-sectional view of the main part of the fin collar of FIG. 本発明の実施の形態２におけるフィンチューブ型熱交換器のフィンカラー要部の断面図Sectional drawing of the fin collar principal part of the finned-tube type heat exchanger in Embodiment 2 of this invention 一般的なフィンチューブ型熱交換器を説明するための部分断面概略正面図Partial cross-sectional schematic front view for explaining a general fin tube heat exchanger 従来の一例のフィンチューブ型熱交換器のフィンカラー要部の断面図Sectional view of the fin collar main part of a conventional fin tube type heat exchanger 従来の別の一例のフィンチューブ型熱交換器のフィンカラー要部の断面図Sectional drawing of the fin collar main part of another conventional fin tube type heat exchanger 従来のさらに別の一例のフィンチューブ型熱交換器のフィンカラー要部の断面図Sectional drawing of the fin collar principal part of the fin tube type heat exchanger of another conventional example
　本発明に係る第１の態様のフィンチューブ型熱交換器は、
　所定の間隔を置いて略平行に積層された複数の伝熱フィンと、
　前記伝熱フィンの平面方向と略直交する方向に前記伝熱フィンを貫通する複数の伝熱管と、を備え、
　前記伝熱管が貫通する前記伝熱フィンの貫通孔の周囲には、前記伝熱フィンの平面方向に対し略直交する方向に延びる略円筒状のフィンカラーが形成され、前記伝熱管は前記フィンカラーに密着した状態で前記貫通孔に挿入され、前記伝熱フィンの平面方向に流れる気体と前記伝熱管の内部を流れる冷媒との間で熱交換を行うようにしたフィンチューブ型熱交換器であって、
　前記フィンカラーは、先端に断面が円弧状のフランジ部と、根元に前記フィンカラーに繋がる周囲のフィン平面から、前記フィンカラーの立ち上げ方向と反対方向に窪む陥没部と、を有し、
　前記フィンカラーの前記陥没部の断面形状は、前記伝熱フィンが積層されたとき、隣接する前記伝熱フィンの前記フィンカラーの前記フランジ部の形状に概略沿う円弧状となるように形成している。
　この構成により、前記フィンカラーの先端の前記フランジ部と前記根元のＲ部との間にできる隙間空間を小さくすることができ、前記伝熱管と前記フィンカラーの接触面積を増加させることができる。また、接触熱抵抗を低減して前記伝熱管と前記伝熱フィンとの間の伝熱を向上させることができるため、熱交換性能を向上させることができる。 The finned tube heat exchanger according to the first aspect of the present invention is:
A plurality of heat transfer fins laminated substantially in parallel at a predetermined interval;
A plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially orthogonal to the planar direction of the heat transfer fins;
A substantially cylindrical fin collar extending in a direction substantially orthogonal to the planar direction of the heat transfer fin is formed around a through hole of the heat transfer fin through which the heat transfer pipe passes. A finned tube heat exchanger that is inserted into the through hole in close contact with the heat transfer fin and exchanges heat between the gas flowing in the plane direction of the heat transfer fin and the refrigerant flowing inside the heat transfer tube. And
The fin collar has a flange portion having an arc-shaped cross section at the tip, and a depressed portion recessed in a direction opposite to the rising direction of the fin collar from a peripheral fin plane connected to the fin collar at the root,
When the heat transfer fins are stacked, the cross-sectional shape of the depressed portion of the fin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the fin collar of the adjacent heat transfer fin. Yes.
With this configuration, a gap space formed between the flange portion at the tip of the fin collar and the R portion at the base can be reduced, and the contact area between the heat transfer tube and the fin collar can be increased. In addition, since the contact heat resistance can be reduced and the heat transfer between the heat transfer tubes and the heat transfer fins can be improved, the heat exchange performance can be improved.
　さらに、前記伝熱管と前記伝熱フィン以外の材料を必要としないため、製品廃棄時のリサイクル性を損なうことがない。 Furthermore, since materials other than the heat transfer tubes and the heat transfer fins are not required, the recyclability at the time of product disposal is not impaired.
　本発明に係る第２の態様のフィンチューブ型熱交換器は、特に、第１の態様の構成に前記フィンカラーのまわりを囲むように、前記フィンカラーの立ち上げ方向に設けられた略円状の突出部をさらに備え、前記略円状の突出部の直径を、前記フィンカラーの先端の前記フランジ部の最外縁の直径以上となるように構成している。
　この構成により、前記伝熱フィンを積層したとき、前記フィンカラーの軸中心のずれが少ない。また、前記フィンカラーに挿入された前記伝熱管を拡管したとき、円周方向に密着性の粗密が発生しにくいので、良好な密着性を確保することができ、さらに接触熱抵抗を低減することができる。 The finned-tube heat exchanger according to the second aspect of the present invention is particularly substantially circular provided in the rising direction of the fin collar so as to surround the fin collar in the configuration of the first aspect. And a diameter of the substantially circular protruding portion is set to be equal to or larger than a diameter of the outermost edge of the flange portion at the tip of the fin collar.
With this configuration, when the heat transfer fins are stacked, the axial displacement of the fin collar is small. In addition, when the heat transfer tube inserted into the fin collar is expanded, it is difficult for the density of adhesion to occur in the circumferential direction, so that good adhesion can be ensured and contact thermal resistance can be further reduced. Can do.
　以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
（実施の形態１）
　図１は、本発明の第１の実施の形態におけるフィンチューブ型熱交換器２００のフィンカラー要部の断面図である。図２は、図１のＡのフィンカラー要部の拡大断面図である。
　図１に示す第１の実施形態におけるフィンチューブ型熱交換器２００は、複数の伝熱フィン２０１と、複数の伝熱管２０５を備える。また、伝熱管２０５が貫通する伝熱フィン２０１の貫通孔２０８の周囲では、略円筒状のフィンカラー２０２が形成されている。以下、本実施の形態１におけるフィンチューブ型熱交換器２００のフィンカラー２０２について詳述する。 (Embodiment 1)
FIG. 1 is a cross-sectional view of the main part of the fin collar of the finned tube heat exchanger 200 according to the first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the main part of the fin collar of A of FIG.
A finned tube heat exchanger 200 in the first embodiment shown in FIG. 1 includes a plurality of heat transfer fins 201 and a plurality of heat transfer tubes 205. A substantially cylindrical fin collar 202 is formed around the through hole 208 of the heat transfer fin 201 through which the heat transfer tube 205 passes. Hereinafter, the fin collar 202 of the finned tube heat exchanger 200 according to the first embodiment will be described in detail.
　図１および図２において、フィンカラー２０２は、その先端に断面が円弧状のフランジ部２０３と、フィンカラー２０２の根元にフィンカラー２０２に繋がる周囲のフィン平面２０６から、フィンカラー２０２の立ち上げ方向と反対方向に窪む陥没部２０４を有している。フィンカラー２０２の根元の陥没部２０４の断面形状は、伝熱フィン２０１が積層されたとき、隣接する伝熱フィン２０１のフィンカラー２０２の先端のフランジ部２０３の形状に概略沿う円弧状となるように形成されている。 1 and 2, the fin collar 202 has a flange 203 having an arcuate cross section at the tip, and a fin collar 202 rising direction from a peripheral fin plane 206 connected to the fin collar 202 at the root of the fin collar 202. And a depressed portion 204 that is recessed in the opposite direction. When the heat transfer fins 201 are stacked, the cross-sectional shape of the recessed portion 204 at the base of the fin collar 202 is an arc shape that roughly follows the shape of the flange portion 203 at the tip of the fin collar 202 of the adjacent heat transfer fin 201. Is formed.
　以上のように構成されたフィンチューブ熱交換器２００について、その動作、作用を説明する。 The operation and action of the fin tube heat exchanger 200 configured as described above will be described.
　本実施の形態１においては、フィンカラー２０２は、その先端に断面が円弧状のフランジ部２０３と、フィンカラー２０２の根元にフィンカラー２０２に繋がる周囲のフィン平面２０６から、フィンカラー２０２の立ち上げ方向と反対方向に窪む陥没部２０４を有する。フィンカラー２０２の根元の陥没部２０４の断面形状は、伝熱フィン２０１が積層されたとき、隣接する伝熱フィン２０１のフィンカラー２０２の先端のフランジ部２０３の形状に概略沿う円弧状となるように形成されている。そのため、複数の伝熱フィン２０１が積層されたとき、フィンカラー２０２の先端のフランジ部２０３のＲ部と根元の陥没部２０４のＲ形状との間にできる隙間空間２０７を小さくすることができる。また、フィンカラー２０２に挿入される伝熱管２０５を拡管したとき、伝熱管２０５とフィンカラー２０２の接触面積を増加させることができる。さらに、接触熱抵抗を低減して伝熱管２０５と伝熱フィン２０１との間の伝熱を向上させることができるため、熱交換性能を向上させることができる。 In the first embodiment, the fin collar 202 is raised from a flange portion 203 having an arcuate cross section at the tip and a peripheral fin plane 206 connected to the fin collar 202 at the root of the fin collar 202. It has a depression 204 that is recessed in the opposite direction. When the heat transfer fins 201 are stacked, the cross-sectional shape of the recessed portion 204 at the base of the fin collar 202 is an arc shape that roughly follows the shape of the flange portion 203 at the tip of the fin collar 202 of the adjacent heat transfer fin 201. Is formed. Therefore, when the plurality of heat transfer fins 201 are stacked, the gap space 207 formed between the R portion of the flange portion 203 at the tip of the fin collar 202 and the R shape of the root depressed portion 204 can be reduced. Further, when the heat transfer tube 205 inserted into the fin collar 202 is expanded, the contact area between the heat transfer tube 205 and the fin collar 202 can be increased. Furthermore, since the contact heat resistance can be reduced and the heat transfer between the heat transfer tubes 205 and the heat transfer fins 201 can be improved, the heat exchange performance can be improved.
　また、本実施の形態１におけるフィンチューブ型熱交換器２００は、前記伝熱管２０５と前記伝熱フィン２０１以外の材料を必要としないため、製品廃棄時のリサイクル性を損なうことがない。 In addition, the finned tube heat exchanger 200 according to the first embodiment does not require materials other than the heat transfer tubes 205 and the heat transfer fins 201, and thus does not impair the recyclability at the time of product disposal.
　（実施の形態２）
　図３は、本発明の第２の実施の形態におけるフィンチューブ型熱交換器２００ａのフィンカラー要部の断面図である。
　図３に示すように、本実施の形態２におけるフィンチューブ型熱交換器２００ａは、前述した実施の形態１におけるフィンチューブ型熱交換器２００と比べて、フィンカラー２０２ａに突出部２０９を設けている点で異なる。本実施の形態２において、その他の構成は、実施の形態１のフィンチューブ型熱交換器２００と同じである。以下、本実施の形態２におけるフィンチューブ型熱交換器２００ａのフィンカラー２０２ａについて詳述する。 (Embodiment 2)
FIG. 3 is a cross-sectional view of the main part of the fin collar of the finned tube heat exchanger 200a according to the second embodiment of the present invention.
As shown in FIG. 3, the fin tube type heat exchanger 200a according to the second embodiment has a protrusion 209 provided on the fin collar 202a as compared with the fin tube type heat exchanger 200 according to the first embodiment described above. Is different. In the second embodiment, the other configurations are the same as those of the finned tube heat exchanger 200 of the first embodiment. Hereinafter, the fin collar 202a of the finned tube heat exchanger 200a according to the second embodiment will be described in detail.
　図３において、フィンカラー２０２ａは、実施の形態１と同様に、その先端に断面が円弧状のフランジ部２０３と、フィンカラー２０２ａの根元にフィンカラー２０２ａに繋がる周囲のフィン平面２０６から、フィンカラー２０２ａの立ち上げ方向と反対方向に窪む陥没部２０４を有する。フィンカラー２０２ａの根元の陥没部２０４の断面形状は、伝熱フィン２０１ａが積層されたとき、隣接する伝熱フィン２０１ａのフィンカラー２０２ａの先端のフランジ部２０３の形状に概略沿う円弧状となるように形成されている。また、フィンカラー２０２ａのまわりを囲むように、フィンカラー２０２ａの立ち上げ方向に略円状の突出部２０９が設けられている。略円状の突出部２０９の直径は、フィンカラー２０２ａの先端のフランジ部２０３の最外縁の直径以上となるように形成されている。 In FIG. 3, the fin collar 202a is similar to the first embodiment in that a fin collar 202 is formed from a flange portion 203 having an arcuate cross section at the tip and a peripheral fin plane 206 connected to the fin collar 202a at the root of the fin collar 202a. It has a depression 204 that is recessed in the direction opposite to the rising direction of 202a. When the heat transfer fins 201a are stacked, the cross-sectional shape of the recess 204 at the base of the fin collar 202a is an arc shape that roughly follows the shape of the flange portion 203 at the tip of the fin collar 202a of the adjacent heat transfer fin 201a. Is formed. A substantially circular protrusion 209 is provided in the rising direction of the fin collar 202a so as to surround the fin collar 202a. The diameter of the substantially circular protrusion 209 is formed to be equal to or greater than the diameter of the outermost edge of the flange 203 at the tip of the fin collar 202a.
　以上のように構成されたフィンチューブ熱交換器２００ａについて、以下その動作、作用を説明する。 The operation and action of the fin tube heat exchanger 200a configured as described above will be described below.
　本実施の形態２においては、隙間空間２０７を小さくする実施の形態１の構成に加えて、フィンカラー２０２ａのまわりを囲むように、フィンカラー２０２ａの立ち上げ方向に略円状の突出部２０９を設けている。略円状の突出部２０９の直径は、フィンカラー２０２ａの先端のフランジ部２０３の最外縁の直径以上となるように形成されている。伝熱フィン２０１ａを積層したとき、フィンカラー２０２ａの軸中心のずれが少ない。また、フィンカラー２０２ａに挿入された伝熱管２０５を拡管したとき、円周方向に密着性の粗密が発生しにくいので、良好な密着性を確保することができ、さらに接触熱抵抗を低減することができる。 In the second embodiment, in addition to the configuration of the first embodiment in which the gap space 207 is reduced, a substantially circular protruding portion 209 is provided in the rising direction of the fin collar 202a so as to surround the fin collar 202a. Provided. The diameter of the substantially circular protrusion 209 is formed to be equal to or greater than the diameter of the outermost edge of the flange 203 at the tip of the fin collar 202a. When the heat transfer fins 201a are stacked, the axial displacement of the fin collar 202a is small. In addition, when the heat transfer tube 205 inserted into the fin collar 202a is expanded, it is difficult for the density of adhesion to occur in the circumferential direction, so that good adhesion can be ensured and contact thermal resistance can be further reduced. Can do.
　以上のように、本発明にかかるフィンチューブ型熱交換器は、フィンカラーの先端に断面が円弧状のフランジ部と、フィンカラーの根元にフィンカラーに繋がる周囲のフィン平面から、フィンカラーの立ち上げ方向と反対方向に窪む陥没部を有している。フィンカラーの根元の陥没部の断面形状は、伝熱フィンが積層されたとき、隣接する伝熱フィンのフィンカラーの先端のフランジ部の形状に概略沿う円弧状となるように形成されている。そのため、フィンカラーの先端のフランジ部と根元のＲ部との間にできる隙間空間を小さくすることができる。また、伝熱管とフィンカラーの接触面積を増加させることができ、接触熱抵抗を低減して伝熱管と伝熱フィンとの間の伝熱を向上させることができる。その結果、熱交換性能を向上させることが可能となるので、各種空気調和機や冷蔵庫、冷凍庫だけでなく、ヒートポンプ式給湯機やガス湯沸かし器等の用途にも適用できる。 As described above, the fin tube type heat exchanger according to the present invention has a fin collar standing up from a flange portion having an arcuate cross section at the tip of the fin collar and a surrounding fin plane connected to the fin collar at the root of the fin collar. It has a depression that is recessed in the direction opposite to the raising direction. When the heat transfer fins are stacked, the cross-sectional shape of the depressed portion at the base of the fin collar is formed in an arc shape that roughly follows the shape of the flange portion at the tip of the fin collar of the adjacent heat transfer fin. Therefore, the gap space formed between the flange portion at the tip of the fin collar and the R portion at the base can be reduced. Further, the contact area between the heat transfer tube and the fin collar can be increased, and the contact heat resistance can be reduced to improve the heat transfer between the heat transfer tube and the heat transfer fin. As a result, it is possible to improve the heat exchange performance, so that it can be applied not only to various air conditioners, refrigerators, and freezers, but also to uses such as heat pump water heaters and gas water heaters.
　２００、２００ａ　フィンチューブ型熱交換器
　２０１、２０１ａ　伝熱フィン
　２０２、２０２ａ　フィンカラー
　２０３　フランジ部
　２０４　陥没部
　２０５　伝熱管
　２０６　フィン平面
　２０７　フィンカラーと伝熱管の間の隙間空間
　２０８　貫通孔
　２０９　突出部 200, 200a Fin tube type heat exchanger 201, 201a Heat transfer fin 202, 202a Fin collar 203 Flange portion 204 Depressed portion 205 Heat transfer tube 206 Fin plane 207 Clearance space between fin collar and heat transfer tube 208 Through hole 209 Protruding portion

Claims (2)

  1. 　所定の間隔を置いて略平行に積層された複数の伝熱フィンと、
    　前記伝熱フィンの平面方向と略直交する方向に前記伝熱フィンを貫通する複数の伝熱管と、を備え、
    　前記伝熱管が貫通する前記伝熱フィンの貫通孔の周囲には、前記伝熱フィンの平面方向に対し略直交する方向に延びる略円筒状のフィンカラーが形成され、前記伝熱管は前記フィンカラーに密着した状態で前記貫通孔に挿入され、前記伝熱フィンの平面方向に流れる気体と前記伝熱管の内部を流れる冷媒との間で熱交換を行うようにしたフィンチューブ型熱交換器であって、
    　前記フィンカラーは、先端に断面が円弧状のフランジ部と、根元に前記フィンカラーに繋がる周囲のフィン平面から、前記フィンカラーの立ち上げ方向と反対方向に窪む陥没部と、を有し、
    　前記フィンカラーの前記陥没部の断面形状は、前記伝熱フィンが積層されたとき、隣接する前記伝熱フィンの前記フィンカラーの前記フランジ部の形状に概略沿う円弧状となるように形成したことを特徴とするフィンチューブ型熱交換器。     A plurality of heat transfer fins laminated substantially in parallel at a predetermined interval;
    A plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially orthogonal to the planar direction of the heat transfer fins;
    A substantially cylindrical fin collar extending in a direction substantially orthogonal to the planar direction of the heat transfer fin is formed around a through hole of the heat transfer fin through which the heat transfer pipe passes. A finned tube heat exchanger that is inserted into the through hole in close contact with the heat transfer fin and exchanges heat between the gas flowing in the plane direction of the heat transfer fin and the refrigerant flowing inside the heat transfer tube. And
    The fin collar has a flange portion having an arc-shaped cross section at the tip, and a depressed portion recessed in a direction opposite to the rising direction of the fin collar from a peripheral fin plane connected to the fin collar at the root,
    The cross-sectional shape of the depressed portion of the fin collar is formed to have an arc shape that roughly follows the shape of the flange portion of the fin collar of the adjacent heat transfer fin when the heat transfer fins are stacked. A finned tube heat exchanger.
  2. 　前記フィンカラーのまわりを囲むように、前記フィンカラーの立ち上げ方向に設けられた略円状の突出部をさらに備え、
    　前記略円状の突出部の直径を、前記フィンカラーの先端の前記フランジ部の最外縁の直径以上となるように構成した請求項１に記載のフィンチューブ型熱交換器。     Further comprising a substantially circular protrusion provided in the rising direction of the fin collar so as to surround the fin collar,
    The fin tube type heat exchanger according to claim 1, wherein a diameter of the substantially circular protruding portion is set to be equal to or larger than a diameter of an outermost edge of the flange portion at a tip of the fin collar.
PCT/JP2012/006625 2011-11-25 2012-10-17 Fin-tube type heat exchanger WO2013076907A1 (en)

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