KR20140103895A - Fin-tube type heat exchanger - Google Patents

Fin-tube type heat exchanger Download PDF

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KR20140103895A
KR20140103895A KR1020147005248A KR20147005248A KR20140103895A KR 20140103895 A KR20140103895 A KR 20140103895A KR 1020147005248 A KR1020147005248 A KR 1020147005248A KR 20147005248 A KR20147005248 A KR 20147005248A KR 20140103895 A KR20140103895 A KR 20140103895A
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South Korea
Prior art keywords
heat transfer
fin
collar
heat
pin
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KR1020147005248A
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Korean (ko)
Inventor
쇼이치 요코야마
미치히토 오자키
가오루 호소카와
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파나소닉 주식회사
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Publication of KR20140103895A publication Critical patent/KR20140103895A/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

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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

Wherein a concave portion recessed in a direction opposite to a standing direction of the pin collar is formed at a root of the fin collar, and a cross-sectional shape of the depressed portion of the root of the fin collar is substantially the same as a flange shape of the tip end of the adjacent pin collar It is possible to reduce the gap space and increase the contact area between the heat transfer tube and the fin collar so that the contact heat resistance is reduced to improve the heat transfer between the heat transfer tube and the heat transfer fin, The heat exchange performance can be improved.

Figure P1020147005248

Description

FIN-TUBE TYPE HEAT EXCHANGER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finned tube heat exchanger for exchanging heat between a gas such as air flowing between a plurality of flat plate-shaped fins and a fluid such as water or refrigerant flowing in the heat transfer tube. In particular, the present invention relates to an air conditioner such as a room air conditioner, a package air conditioner, a car air conditioner, a finned tube heat exchanger used in a heat pump type hot water heater, a refrigerator,

Most of the heat exchangers assembled in an air conditioner or a refrigerator such as a room air conditioner are fin tube heat exchangers.

Fig. 4 is a schematic partial cross-sectional front view for explaining a general fin-tube type heat exchanger 1. Fig.

The fin-tube heat exchanger (1) comprises a plurality of heat transfer fins (31) arranged in parallel with each other at a predetermined interval, and a plurality of heat transfer fins (31) And a heat transfer pipe (33). Heat and heat are exchanged between the heat transfer pipe (33) and the outside air via the heat transfer pipe (33) and the heat transfer fin (31) by flowing water or a coolant into the heat transfer pipe (33).

The fin-tube type heat exchanger 1 is generally manufactured by the following process.

First, a thin plate made of aluminum or an aluminum alloy or the like is pressed to form the heat conductive fin 31 having a substantially cylindrical pin-shaped collar standing substantially perpendicular to the plane of the thin plate. Next, the heat transfer pipe 33 such as copper or a copper alloy is bent into a U-shape to form a hair pin shape. Then, a plurality of the heat conductive fins (31) are stacked in parallel, and the heat conductive tubes (33) are passed through the fins. The outer surface of the heat transfer pipe 33 and the inner surface of the fin collar are in close contact with each other by expanding the heat transfer pipe 33 in an appropriate manner so that the heat transfer pipe 33 is fixed to the heat transfer fin 31. Finally, the U-band tube 35 is inserted into the open end of the heat transfer tube 33 and is soldered, thereby making the heat transfer tube 33 communicate with each other.

BACKGROUND ART [0002] In recent years, significant improvements in energy consumption efficiency have been required also in air conditioners, refrigerators, and the like. Therefore, a finned tube heat exchanger assembled in these devices is required to improve heat transfer performance.

As factors affecting the heat transfer performance of the finned tube heat exchanger, there are a heat transfer rate between the heat transfer tube 33 and a fluid such as water or a refrigerant flowing in the heat transfer tube 33, a contact heat resistance between the heat transfer tube and the fin collar, 31 and the heat transfer rate between the air and the heat conductive fins 31 are known.

The increase in the inner surface area of the heat transfer pipe 33 and the effect of stirring the refrigerant can be suppressed because the boiling heat transfer, the condensation heat transfer, or the convection heat transfer in the pipe are effective for the improvement in the heat transfer rate between the heat transfer pipe 33 and the fluid flowing therein. The development of an inner surface groove shape which is optimum for increasing the thickness of the inner surface is progressing.

As means for improving the heat transfer rate between the air and the heat conductive fins 31, it is possible to provide undulations for suppressing the formation of a temperature boundary layer of air on the surface of the heat conductive fins 31, or to provide a cutout portion called a slit or louver Or a method is provided. These undulations and optimization of the dimensions and shapes of the slits or louvers are underway. The fin efficiency is uniquely determined by the plate thickness and thermal conductivity of the heat conductive fins 31 and the diameter and arrangement of the heat conductive pipes 33, so that significant design has been carried out.

On the other hand, the contact thermal resistance between the heat transfer pipe (33) and the fin collar is influenced by the degree of close contact between the heat transfer pipe (33) and the fin collar.

5 is a cross-sectional view of a pin collar recessed portion of a conventional finned tube heat exchanger. 5, the fin collar 102 of the heat transfer fin 101 in the fin-tube heat exchanger generally has a flange portion 103 having an arcuate cross section at the tip end, and the fin collar And an R portion 104 having a lower portion widened outward in the radial direction. Therefore, the heat conductive fins 101 are stacked and the heat transfer tube 105 is inserted into the fin collar 102. As a result, a gap space 107 which can not be brought into close contact with the fin collar 102 is generated As a result, the contact heat resistance is deteriorated.

Further, for example, when aluminum or an aluminum alloy is used as a material of the heat conductive fins and copper or a copper alloy is used as a material of the heat conductive tube, when the heat conductive tube is fixed to the pin collar with respect to the fins, Keep the hole diameter. On the other hand, it can be seen that the heat transfer tube having a larger elastic modulus is slightly shrunk after expansion, and a slight gap portion is formed between the heat transfer tube and the fin. It is considered that the loss (thermal resistance) of the performance of the heat exchanger by such a gap portion is about 5% of the total heat exchanger (see, for example, Non-Patent Document 1).

6 is a cross-sectional view of a pin collar recessed portion of another conventional finned tube heat exchanger. As shown in Fig. 6, in order to improve the heat transfer performance of the heat exchanger by reducing the gap space or the gap 107, a thermally conductive fine powder such as an organic coating film or a metal powder, (Refer to Patent Documents 1 to 6) that a space 108 or a space portion is filled with a resin or the like to fill the void space or void portion. In addition, a technique of heating and melting a low-melting-point nonmetallic material without expanding the heat transfer pipe to closely contact the heat transfer pipe and the fin (see Patent Document 7) has been proposed. Further, a technique of closely adhering the fin and the heat transfer tube with an adhesive (see Patent Document 8) has also been proposed.

7 is a cross-sectional view of a pin collar recessed portion of another conventional finned tube heat exchanger. The purpose of the pin disclosed in Patent Document 9 shown in Fig. 7 is to prevent the adhesion between the pin collar and the heat transfer tube from deteriorating due to the occurrence of the aback phenomenon in which the adjacent fins come into contact with each other when the pin is expanded. It is aimed at mass production. In order to achieve this object, the pin disclosed in Patent Document 9 is provided with a protruding portion 32 in which a part of the flat surface portion 22 near the root R portion of the pin collar 26 is protruded.

Japanese Patent Application Laid-Open No. 1981-133595 Japanese Patent Application Laid-Open No. 1983-158493 Japanese Patent Application Laid-Open No. 1998-160374 Japanese Patent Application Laid-Open No. 1985-162193 Japanese Patent No. 3982768 Japanese Patent Application Laid-Open No. 2010-169344 Japanese Patent Application Laid-Open No. 1984-15794 Japanese Patent Application Laid-Open No. 1997-145282 Japanese Patent Application Laid-Open No. 1997-119792

Tanaka, "Optimum Design and Economics in Heat Exchanger for Air Conditioning", Research of Machinery, 1989, Vol. 41, No. 9, p.1005-1011

However, in the above-described conventional configuration, in the gap space formed between the flange portion having the circular arc end face of the tip end of the fin collar and the R portion having the circular arc end face when the heat conductive fins are laminated, The collar and the heat transfer tube can not be brought into direct contact with each other. Therefore, there is a problem that there is a limit to reduction of the contact thermal resistance.

The radius of the arc shape of the end face of the flange portion at the tip end of the fin collar and the radius of the arc shape of the cross section of the R portion of the root of the fin collar are preferably set so that, It can not be made small because there is a restriction on the elongation of the material. From this point of view, there is a problem that there is a limit to reduction of contact thermal resistance.

In addition, filling the gap space with a material different from the heat conductive fin or the heat conductive pipe deteriorates the recyclability at the time of product disposal.

Further, even if the projecting portion is provided at the root of the pin collar and the lamination property of the fin is made good, the gap space itself occurring between the flange portion at the tip end of the fin collar and the R portion of the root can not be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a fin tube heat exchanger capable of increasing the contact area between the heat transfer tube and the pin collar section, And the like.

In order to solve the above-mentioned conventional problems, the fin-tube type heat exchanger of the present invention,

A plurality of heat conductive fins stacked substantially parallel to each other at predetermined intervals,

And a plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially perpendicular to the plane direction of the heat transfer fins,

A substantially cylindrical fin collar extending in a direction substantially perpendicular to the plane direction of the heat conductive fin is formed around the through hole of the heat conductive fin through which the heat conductive tube penetrates, A heat exchanger for exchanging heat between a gas flowing in a plane direction of the heat transfer fin and a refrigerant flowing in the heat transfer tube,

Wherein the pin collar has a flange portion having an arc shape in cross section at a tip end thereof and a concave portion recessed in a direction opposite to a rising direction of the pin collar from a peripheral pin plane connected to the pin collar at a root,

Sectional shape of the depressed portion of the pin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the pin collar of the adjacent heat transfer fin when the heat transfer fin is stacked.

Thereby, a gap space formed between the flange portion at the tip end of the fin collar and the R portion of the root can be reduced. In addition, since the contact area between the heat transfer tube and the fin collar can be increased, 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. Further, since materials other than the heat transfer tube and the heat transfer fin are not required, the recyclability at the time of product disposal is not impaired.

The fin tube-type heat exchanger of the present invention can reduce the clearance space formed between the flange portion at the tip end of the fin collar and the R portion of the root. Further, it is possible to increase the contact area between the heat conductive pipe and the pin collar, thereby reducing the contact heat resistance and improving the heat transfer between the heat conductive pipe and the heat conductive fins, thereby improving the heat exchange performance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a pin collar recessed portion of a finned tube type heat exchanger according to Embodiment 1 of the present invention,
Fig. 2 is an enlarged cross-sectional view of the pin collar recess of Fig. 1,
3 is a cross-sectional view of a pin collar recessed portion of a finned tube type heat exchanger according to Embodiment 2 of the present invention,
Fig. 4 is a schematic partial cross-sectional front view for explaining a general fin tube type heat exchanger, Fig.
5 is a cross-sectional view of a pin collar recessed portion of a conventional finned tube heat exchanger,
6 is a cross-sectional view of a pin collar recessed portion of another conventional finned tube heat exchanger,
7 is a cross-sectional view of a pin collar recessed portion of another conventional finned tube heat exchanger.

According to a first aspect of the present invention, there is provided a finned tubular heat exchanger,

A plurality of heat conductive fins stacked substantially parallel to each other at predetermined intervals,

And a plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially perpendicular to the plane direction of the heat transfer fins,

A substantially cylindrical fin collar extending in a direction substantially perpendicular to the plane direction of the heat conductive fin is formed around the through hole of the heat conductive fin through which the heat conductive tube penetrates, A heat exchanger for exchanging heat between a gas flowing in a plane direction of the heat transfer fin and a refrigerant flowing in the heat transfer tube,

Wherein the pin collar has a flange portion having an arcuate cross section at the tip end and a depressed portion recessed in a root in a direction opposite to a rising direction of the pin collar from a peripheral pin plane connected to the pin collar,

Sectional shape of the depressed portion of the pin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the pin collar of the adjacent heat transfer fin when the heat transfer fin is stacked.

With this configuration, a gap space formed between the flange portion at the tip end of the fin collar and the R portion of the root can be reduced, and the contact area between the heat transfer tube and the fin collar can be increased. Further, 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.

In addition, since the material other than the heat transfer tube and the heat transfer fin is not required, the recyclability at the time of product disposal is not impaired.

The fin-tube heat exchanger of the second aspect according to the present invention further has a substantially circular protruding portion provided in the configuration of the first aspect and surrounding the periphery of the fin collar in the rising direction of the fin collar, And the diameter of the substantially circular projection is equal to or greater than an outermost diameter of the flange portion at the tip of the pin collar.

With this configuration, when the heat conductive fins are laminated, deviation of the axial center of the pin collar is small. In addition, when the heat transfer pipe inserted in the pin collar is expanded, the tightness of the tightness in the circumferential direction hardly occurs, so that good adhesion can be ensured and contact heat resistance can further be reduced.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited by these embodiments.

(Embodiment 1)

1 is a sectional view of a pin collar recessed portion of a finned tube type heat exchanger 200 according to a first embodiment of the present invention. Fig. 2 is an enlarged cross-sectional view of the pin collar portion of Fig.

The fin tube heat exchanger 200 in the first embodiment shown in Fig. 1 has a plurality of heat transfer fins 201 and a plurality of heat transfer tubes 205. [ A substantially cylindrical pin collar 202 is formed around the through hole 208 of the heat transfer fin 201 through which the heat transfer tube 205 passes. The pin collar 202 of the fin-tube heat exchanger 200 according to the first embodiment will be described in detail below.

1 and 2, the fin collar 202 includes a flange portion 203 having an arcuate cross section at the tip thereof and a peripheral pin fin 202 connected to the fin collar 202 at the root of the fin collar 202. [ (204) recessed in a direction opposite to the direction in which the pin collar (202) stands up. The sectional shape of the depressed portion 204 of the root of the fin collar 202 is such that the flange portion 203 at the tip end of the pin collar 202 of the adjacent heat conductive fin 201 And is formed so as to have an arc shape that roughly follows the shape.

The operation and operation of the fin-tube heat exchanger 200 configured as described above will be described.

In the first embodiment, the pin collar 202 has a flange portion 203 having an arcuate cross section at its tip and a peripheral pin plane (not shown) connected to the pin collar 202 at the root of the pin collar 202 206 in a direction opposite to the standing direction of the pin collar 202. The recessed portion 204 has a concave depression 204 in the direction opposite to the standing direction of the pin collar 202. [ The sectional shape of the depressed portion 204 of the root of the fin collar 202 is such that the flange portion 203 at the tip end of the pin collar 202 of the adjacent heat conductive fin 201 And is formed so as to have an arc shape that roughly follows the shape. The gap space 207 formed between the R portion of the flange portion 203 at the tip end of the pin collar 202 and the R shape of the depressed portion 204 of the root when the plurality of heat transfer fins 201 are stacked, Can be reduced. Further, when the heat transfer pipe 205 inserted into the fin collar 202 is expanded, the contact area between the heat transfer pipe 205 and the fin collar 202 can be increased. Furthermore, since the contact heat resistance can be reduced to improve the heat transfer between the heat transfer pipe 205 and the heat transfer fin 201, the heat exchange performance can be improved.

The fin tube type heat exchanger 200 according to the first embodiment does not require materials other than the heat transfer tube 205 and the heat transfer fin 201, none.

(Embodiment 2)

3 is a cross-sectional view of the pin collar recessed portion of the fin tube type heat exchanger 200a according to the second embodiment of the present invention.

3, the fin tube heat exchanger 200a according to the second embodiment differs from the fin tube heat exchanger 200 according to the first embodiment in that the fin collar 202a is provided with a projecting portion 209) is provided. In the second embodiment, the remaining structure is the same as that of the fin-tube heat exchanger 200 of the first embodiment. The pin collar 202a of the fin-tube heat exchanger 200a according to the second embodiment will be described in detail below.

3, the pin collar 202a has, like the first embodiment, a flange portion 203 having a circular arc-shaped cross section at its tip and a flange portion 203 having a circular arc shape at the root of the pin collar 202a and connected to the pin collar 202a And has a depression 204 recessed in a direction opposite to the rising direction of the pin collar 202a from the pin plane 206 of the pin collar 202a. The cross-sectional shape of the depression 204 of the root of the fin collar 202a is such that when the heat transfer fin 201a is laminated, the flange portion 203 at the tip of the fin collar 202a of the adjacent heat transfer fin 201a And is formed so as to have an arc shape that roughly follows the shape. In addition, a substantially circular protrusion 209 is provided in the rising direction of the pin collar 202a so as to surround the periphery of the pin collar 202a. The diameter of the approximately circular protrusion 209 is formed to be equal to or greater than the outermost diameter of the flange portion 203 at the tip of the pin collar 202a.

The operation and operation of the fin-tube heat exchanger 200a configured as described above will be described below.

In the second embodiment, in addition to the configuration of the first embodiment in which the gap space 207 is made smaller, a substantially circular protrusion 202a is formed in the rising direction of the pin collar 202a so as to surround the periphery of the pin collar 202a. (209). The diameter of the approximately circular protrusion 209 is formed to be equal to or greater than the outermost diameter of the flange portion 203 at the tip of the pin collar 202a. When the heat conductive fins 201a are laminated, the deviation of the axis center of the pin collar 202a is small. Further, when the heat transfer pipe 205 inserted in the fin collar 202a is expanded, since the tightness of the tightness in the circumferential direction is hardly generated, the good adhesion can be ensured and the contact heat resistance can be further reduced.

As described above, the fin tube type heat exchanger according to the present invention has a flange portion having an arc shape in cross section at the tip end of a fin collar, and a flange portion having a circular cross-section at the root of the fin collar And has a concave recess depressed in the direction of the arrow. The cross-sectional shape of the depressed portion of the root of the pin collar is formed to be an arc shape that roughly follows the shape of the flange portion at the tip of the pin collar of the adjacent heat transfer fin when the heat transfer fin is stacked. Therefore, the gap space formed between the flange portion at the tip end of the fin collar and the R portion of the root can be reduced. Further, the contact area between the heat transfer pipe and the pin collar can be increased, and the contact heat resistance can be reduced to improve the heat transfer between the heat transfer pipe 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 types of air conditioners, refrigerators and freezers, but also to applications such as heat pump type water heater and gas water heater.

200, 200a: Finned tube heat exchanger 201, 201a: Heat transfer pin
202, 202a: pin collar 203: flange portion
204: depression portion 205: heat transfer pipe
206: pin plane
207: Clearance space between pin collar and heat transfer tube
208: through hole 209:

Claims (2)

A plurality of heat conductive fins stacked substantially parallel to each other at predetermined intervals,
And a plurality of heat transfer tubes penetrating the heat transfer fins in a direction substantially perpendicular to the plane direction of the heat transfer fins,
A substantially cylindrical fin collar extending in a direction substantially orthogonal to the plane direction of the heat transfer fin is formed around the through hole of the heat transfer fin through which the heat transfer tube penetrates and the heat transfer tube is in close contact with the fin collar And a heat exchanger for exchanging heat between a gas flowing in a plane direction of the heat transfer fin and a refrigerant flowing in the heat transfer tube, the fin tube heat exchanger comprising:
Wherein the pin collar has a flange portion having an arcuate cross section at the tip end and a depressed portion recessed in a root in a direction opposite to a rising direction of the pin collar from a peripheral pin plane connected to the pin collar,
Sectional shape of the depressed portion of the pin collar is formed to be an arc shape that roughly follows the shape of the flange portion of the pin collar of the adjacent heat transfer fin when the heat transfer fin is stacked
Finned tubular heat exchanger. The method according to claim 1,
Further comprising a substantially circular protruding portion provided in a rising direction of the pin collar so as to surround the periphery of the fin collar,
Wherein a diameter of the substantially circular protrusion is configured to be equal to or greater than an outermost diameter of the flange portion at the tip of the pin collar
Finned tubular heat exchanger.
KR1020147005248A 2011-11-25 2012-10-17 Fin-tube type heat exchanger KR20140103895A (en)

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JPJP-P-2011-257528 2011-11-25
JP2011257528 2011-11-25
PCT/JP2012/006625 WO2013076907A1 (en) 2011-11-25 2012-10-17 Fin-tube type heat exchanger

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JP2008232499A (en) * 2007-03-19 2008-10-02 Daikin Ind Ltd Fin for heat exchanger
JP2008249299A (en) * 2007-03-30 2008-10-16 Daikin Ind Ltd Fin tube type heat exchanger and air conditioner

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JP5988177B2 (en) 2016-09-07
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CN103765148B (en) 2016-06-22
JPWO2013076907A1 (en) 2015-04-27

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