US20130306287A1 - L-type turn-fin tube and turn-fin type heat exchanger using the same - Google Patents

L-type turn-fin tube and turn-fin type heat exchanger using the same Download PDF

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Publication number
US20130306287A1
US20130306287A1 US13/898,574 US201313898574A US2013306287A1 US 20130306287 A1 US20130306287 A1 US 20130306287A1 US 201313898574 A US201313898574 A US 201313898574A US 2013306287 A1 US2013306287 A1 US 2013306287A1
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United States
Prior art keywords
fin
turn
tube
type
type turn
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Abandoned
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US13/898,574
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English (en)
Inventor
Byung Hee Ryoo
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Korea Bundy Co Ltd
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Korea Bundy Co Ltd
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
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Assigned to KOREA BUNDY CO., LTD. reassignment KOREA BUNDY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RYOO, BYUNG HEE
Publication of US20130306287A1 publication Critical patent/US20130306287A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • 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
    • F28F1/34—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 obliquely
    • F28F1/36—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 obliquely the means being helically wound fins or wire spirals
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/007—Condensers

Definitions

  • the present invention relates to an L-type turn-fin tube and a turn-fin type heat exchanger using the same, and more particularly, to an L-type turn-fin tube which may provide excellent adhesiveness even with a tube having a small diameter and may improve heat exchange efficiency and a turn-fin type heat exchanger using the L-type turn-fin tube.
  • a refrigeration system is a system that absorbs heat therein and dissipates the heat to the outside by thermodynamically circulating a refrigerant through a compressor, a condenser, an expansion valve, and an evaporator.
  • the condenser and the evaporator applied to the refrigeration system are referred to as heat exchangers.
  • the heat exchangers exchange heat between the refrigerant flowing in a tube and air present outside the tube.
  • the condenser changes the refrigerant, which has been ejected from the compressor, from a high-temperature and high-pressure gaseous state to a room-temperature and high-pressure liquid state to be easily evaporated by emitting heat of the refrigerant to a fluid such as air.
  • the condenser may be classified as a wire-type condenser or a turn-fin type condenser according to a shape thereof.
  • the turn-fin type condenser includes a turn-fin tube.
  • the turn-fin tube includes a refrigerant pipe in which the refrigerant flows and a turn-fin which is coupled to an outer surface of the refrigerant pipe to increase a heat exchange area with external air.
  • Examples of the turn-fin include an L-type turn-fin whose cross-sectional shape in a longitudinal direction is an “L” shape.
  • the L-type turn-fin is manufactured in various ways.
  • the condenser is designed to improve the performance of a refrigeration device or reduce noise.
  • the condenser is designed to prevent the performance of the refrigeration device from being degraded by avoiding an excessive temperature rise, to increase the flux of the refrigerant, and to increase a heat exchange rate, and is also designed to have a compact structure.
  • the refrigerant pipe may have a small diameter in order to reduce a size of the condenser.
  • the refrigerant pipe has a small size, it is difficult for the L-type turn-fin to be wound around the refrigerant pipe and it is also difficult to maintain a shape of the L-type turn-fin wound around the refrigerant pipe.
  • the present invention provides an L-type turn-fin tube which may provide excellent adhesiveness and may improve heat exchange efficiency even with a tube having a small diameter, and a turn-fin type heat exchanger using the L-type turn-fin tube.
  • an L-type turn-fin tube including: a tube in which a refrigerant flows; and an L-type turn-fin including: a groove portion that is recessed in a longitudinal direction; a base portion that is formed on one side of a bent portion obtained when a part of the groove portion is bent in the longitudinal direction; and a fin portion that is formed on the other side of the bent portion, wherein the base portion is spirally wound around an outer surface of the tube.
  • Slits may be further formed in the groove portion at predetermined intervals in a circumferential direction.
  • the slits may be formed to pass through the groove portion or/and to be recessed to predetermined depths in the groove portion.
  • the fin portion may have a cross-sectional thickness that decreases in the longitudinal direction toward an outer circumference.
  • a turn-fin type heat exchanger including: the L-type turn-fin tube as mentioned above; and a bracket that maintains a shape of the L-type turn-fin tube by binding at least one of the L-type turn-fin tube and the L-type turn-fin.
  • FIG. 1 is a front view illustrating an L-type turn-fin tube according to an embodiment of the present invention.
  • FIG. 2 is a side view illustrating the L-type turn-fin tube of FIG. 1 .
  • FIG. 3 is cross-sectional views illustrating a strip subjected to a rolling process and a bending process in the L-type turn-fin tube of FIG. 1 ;
  • FIG. 4 is a side view illustrating an L-type turn-fin tube according to another embodiment of the present invention.
  • FIG. 5 is cross-sectional views illustrating a strip subjected to a rolling process and a bending process in the L-type turn-fin tube of FIG. 4 .
  • FIG. 6 is a front view illustrating the strip of (b) of FIG. 5 .
  • FIG. 7 is cross-sectional views illustrating slits in the L-type turn-fin tube of FIG. 4 .
  • FIG. 8 is a plan view illustrating a turn-fin type heat exchanger using an L-type turn-fin tube, according to an embodiment of the present invention.
  • FIG. 9 is a perspective view illustrating a bent shape of the L-type turn-fin tube of the turn-fin type heat exchanger of FIG. 8 .
  • FIG. 1 is a front view illustrating an L-type turn-fin tube 10 according to an embodiment of the present invention.
  • FIG. 2 is a side view illustrating the L-type turn-fin tube 10 of FIG. 1 .
  • the L-type turn-fin tube 10 may include a tube 20 and an L-type turn-fin 30 .
  • a refrigerant may flow in the tube 20 , and the tube 20 may be formed of a metal.
  • the L-type turn-fin 30 may be formed by being wound around an outer surface of the tube 20 such that a cross-sectional shape in a longitudinal direction is substantially an “L” shape.
  • the L-type turn-fin 30 may be formed of a metal such as steel or aluminum.
  • the L-type turn-fin 30 may include a base portion 55 and a fin portion 56 .
  • the base portion 55 may be attached to the outer surface of the tube 20 , and the fin portion 56 may extend in a diameter direction of the tube 20 .
  • the base portion 55 and the fin portion 56 may be formed on both sides of a bent portion 52 that is formed on a groove portion 51 .
  • a thickness D 1 of the groove portion 51 may be less than a thickness D 2 of the base portion 55 and a thickness D 3 of the fin portion 56 .
  • the bent portion 52 of the L-type turn-fin 30 may have a least thickness among elements of the L-type turn-fin 30 , and thus the bent portion 52 may be more easily bent.
  • the fin portion 56 may be formed to be almost perpendicular to the base portion 55 , and thus a cross-sectional shape of the L-type turn-fin 30 in the longitudinal direction may be a better “L” shape.
  • bent portion 52 of the L-type turn-fin 30 may be more easily bent, an inner diameter after the L-type turn-fin 30 is wound around the tube 20 may be reduced.
  • the L-type turn-fin 30 may be stably closely attached to even a tube having a small diameter equal to or less than 8 mm.
  • the fin portion 56 may be formed such that a cross-sectional thickness in the longitudinal direction decreases toward an outer circumference.
  • an outer circumferential part of the fin portion 56 may spread widely, and thus a cross-sectional shape of the L-type turn-fin 30 in the longitudinal direction may be a satisfactory “L” shape.
  • the fin portion 56 may not be wrinkled.
  • FIG. 3 is cross-sectional views illustrating a strip 50 subjected to a rolling process and a bending process in the L-type turn-fin tube 10 of FIG. 1 .
  • the L-type turn-fin 30 wound around the tube 20 may be supplied as the strip 50 .
  • the strip 50 may be a metal plate member having a flat band shape.
  • the groove portion 51 may be formed to be recessed in the strip 50 in a longitudinal direction of the strip 50 using a first rolling process.
  • Both sides 51 a and 51 b of the groove portion 51 may be inclined.
  • the groove portion 51 may be eccentric from the center of the strip 50 toward a side.
  • a part of the groove portion 51 may be bent using a first bending process in the longitudinal direction to form the bent portion 52 .
  • the bent portion 52 may be bent at a first angle A 1 .
  • the first angle A 1 may range from 115 to 130°.
  • the bent portion 52 may be bent at a second angle A 2 using a second bending process.
  • the second angle A 2 may range from 86 to 114°.
  • the bent portion 52 may be bent at a third angle A 3 using a third bending process.
  • the third angle A 3 may range from 85 to 95°.
  • the strip 50 including the fin portion 56 and the base portion 55 whose cross-sectional shape in the longitudinal direction is an “L” shape may be formed.
  • the strip 50 having been subjected to the third bending process may be wound around the tube 20 to form the L-type turn-fin 30 .
  • the fin portion 56 may be further rolled using a second rolling process.
  • the fin portion 56 may be formed using the second rolling process such that a thickness decreases toward the outer circumference of the fin portion 56 .
  • a cross-sectional shape of the L-type turn-fin 30 in the longitudinal direction may be a satisfactory “L” shape, and the fin portion 56 may not be wrinkled.
  • FIG. 4 is a side view illustrating an L-type turn-fin tube 130 according to another embodiment of the present invention.
  • Slits 180 may be formed in a groove portion 151 , and other elements are the same as those of FIG. 1 and thus a repeated explanation thereof will not be given.
  • the slits 180 may be formed in the groove portion 151 of the L-type turn-fin tube 130 .
  • the slits 180 may be formed at predetermined intervals in a circumferential direction, and each of the slits 180 may longitudinally extend in a diameter direction of the L-type turn-fin tube 130 .
  • the slits 180 may be densely formed in the groove portion 151 .
  • the slits 180 may be formed to pass through the groove portion 151 or to be recessed to predetermined depths in the groove portion 151 .
  • some of the slits 180 may be formed to pass through the groove portion 151 and the remainder may be formed to be recessed to predetermined depths in the groove portion 151 .
  • the slits 180 are formed to be recessed to predetermined depths in the groove portion 151 , since a heat exchange area with a fluid such as air may be increased due to the slits 180 , heat exchange may more effectively occur.
  • FIG. 5 is cross-sectional views illustrating a strip 150 subjected to a rolling process and a bending process in the L-type turn-fin tube 130 of FIG. 4 .
  • FIG. 6 is a front view illustrating the strip 150 of (b) of FIG. 5 .
  • FIG. 7 is cross-sectional views illustrating the slits 180 in the L-type turn-fin tube of FIG. 4 . The following will be explained with reference to FIGS. 5 through 7 .
  • the slits 180 may be formed at the same time as the groove portion 151 is formed by performing a first rolling process on the strip 150 .
  • a slit forming unit (not shown) for forming the slits 180 may be further formed on a rolling machine (not shown) that performs a first rolling on the strip 150 .
  • the slits 180 may be formed at predetermined intervals in a longitudinal direction of the strip 150 .
  • Each of the slits 180 may longitudinally extend in a width direction of the strip 150 .
  • the slits 180 may be formed to pass through the groove portion 151 .
  • the slits 180 may pass through the groove portion 151 to have predetermined widths as shown in FIG. 7A .
  • the slits 180 may pass through the groove portion 151 such that thicknesses decrease away from one side toward the other side as shown in FIG. 7B .
  • the slits 180 may be widened, to form holes.
  • the slits 180 may form passages through which a fluid such as air may flow, heat exchange with the L-type turn-fin tube 130 may more effectively occur.
  • the strip 150 when the strip 150 is wound around the tube 120 , the strip 150 may easily stretch in a circumferential direction on the groove portion 151 of the tube 120 due to the slits 180 , and thus the strip 150 may be more efficiently wound around the tube 120 .
  • the slits 180 may be formed to be recessed to predetermined depths in the groove portion 151 as shown in FIG. 7C .
  • the slits 180 may be widened to form grooves.
  • the slits 180 may be widened and thus the strip 150 may easily stretch in the circumferential direction of the groove portion 151 . Accordingly, the strip 150 may be more efficiently wound around the tube 120 .
  • some of the slits 180 may be formed to pass through the groove portion 151 and the remainder may be formed to be recessed in the groove portion 151 .
  • FIG. 8 is a plan view illustrating a turn-fin type heat exchanger using an L-type turn-fin tube 200 according to an embodiment of the present invention.
  • FIG. 9 is a perspective view illustrating a bent shape of the L-type turn-fin tube 200 of the turn-fin type heat exchanger of FIG. 8 .
  • the turn-fin type heat exchanger may include the L-type turn-fin tube 200 and a bracket 300 .
  • the L-type turn-fin tube 200 may include an L-type turn-fin manufactured with the strip 50 and/or 150 of FIG. 1 and/or FIG. 4 .
  • the L-type turn-fin tube 200 may be formed by being subjected to a first bending process in a direction perpendicular to a longitudinal direction of the L-type turn-fin tube 200 to have a meandering shape and then to a second bending process to have a roll shape.
  • the number of columns formed by the first bending process and the number of rolls formed by the second bending process may be appropriately determined according to required heat exchange efficiency and a space in which the turn-fin type heat exchanger is installed.
  • the bracket 300 may fix the L-type turn-fin tube 200 to maintain a shape of the L-type turn-fin tube 200 .
  • the bracket 200 may be configured to bind at least one of an L-type turn-fin 230 and a tube 220 of the L-type turn-fin tube 200 .
  • the bracket 300 may be modified in various ways.
  • the bracket 300 may include an L-type turn-fin tube binding bracket 310 for binding the L-type turn-fin tube 200 and a coupling bracket 320 coupled to fix the L-type turn-fin tube binding bracket 310 .
  • a bent portion of an L-type turn-fin is formed on a groove portion that is recessed in a longitudinal direction of the L-type turn-fin, a base portion of the L-type turn-fin may be easily closely wound around a tube having a small diameter.
  • a cross-sectional shape of the L-type turn-fin in the longitudinal direction may be a satisfactory “L” shape.
  • slits may be further formed in the groove portion of the L-type turn-fin to pass through the groove portion or to be recessed to predetermined depths in the recessed portion. Since a heat exchange area may be further increased due to the slits, heat exchange efficiency may be improved.

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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)
US13/898,574 2012-05-21 2013-05-21 L-type turn-fin tube and turn-fin type heat exchanger using the same Abandoned US20130306287A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2012-0053862 2012-05-21
KR1020120053862A KR101173842B1 (ko) 2012-05-21 2012-05-21 엘형 턴핀 튜브 및 이를 이용한 턴핀형 열교환기

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US13/898,574 Abandoned US20130306287A1 (en) 2012-05-21 2013-05-21 L-type turn-fin tube and turn-fin type heat exchanger using the same

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US (1) US20130306287A1 (ko)
JP (1) JP5653478B2 (ko)
KR (1) KR101173842B1 (ko)
CN (1) CN103424023B (ko)
MX (1) MX2013005665A (ko)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
JP2016102643A (ja) * 2014-11-18 2016-06-02 株式会社アタゴ製作所 熱交換器
USD762289S1 (en) * 2014-07-15 2016-07-26 Dometic Sweden Ab Heat exchanger
US20180031333A1 (en) * 2016-08-01 2018-02-01 Raytheon Company Thermal storage heat exchanger structures employing phase change materials

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CN105091653B (zh) * 2014-05-15 2018-03-23 孙惠芳 翅片换热器、螺旋翅片管及其制造方法
CN105043151A (zh) * 2015-07-21 2015-11-11 东南大学 一种鳍片管及换热器
CN106225333A (zh) * 2016-08-30 2016-12-14 常州市常蒸热交换器科技有限公司 高效新型背部直冷平板冷凝器

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US3388449A (en) * 1965-09-16 1968-06-18 Arthur H. Mcelroy Apparatus for forming integrally finned tubing
US4107832A (en) * 1974-07-31 1978-08-22 Balke-Durr Aktiengesellschaft Method for winding spiral fins onto oval tubing
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USD762289S1 (en) * 2014-07-15 2016-07-26 Dometic Sweden Ab Heat exchanger
USD764035S1 (en) * 2014-07-15 2016-08-16 Dometic Sweden Ab Heat exchanger
USD764034S1 (en) * 2014-07-15 2016-08-16 Dometic Sweden Ab Heat exchanger
JP2016102643A (ja) * 2014-11-18 2016-06-02 株式会社アタゴ製作所 熱交換器
US20180031333A1 (en) * 2016-08-01 2018-02-01 Raytheon Company Thermal storage heat exchanger structures employing phase change materials
US10436522B2 (en) * 2016-08-01 2019-10-08 Raytheon Company Thermal storage heat exchanger structures employing phase change materials

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JP2013242137A (ja) 2013-12-05
MX2013005665A (es) 2013-11-21

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