WO2009110664A1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
WO2009110664A1
WO2009110664A1 PCT/KR2008/004050 KR2008004050W WO2009110664A1 WO 2009110664 A1 WO2009110664 A1 WO 2009110664A1 KR 2008004050 W KR2008004050 W KR 2008004050W WO 2009110664 A1 WO2009110664 A1 WO 2009110664A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
tube
tubes
heat exchanger
return
Prior art date
Application number
PCT/KR2008/004050
Other languages
English (en)
Inventor
Seung-Cheol Baek
Young-Hwan Ko
Tae-Gyun Park
Sim-Won Chin
Nae-Hyun Park
Original Assignee
Lg Electronics Inc.
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
Priority claimed from KR1020080021355A external-priority patent/KR101380078B1/ko
Priority claimed from KR1020080034434A external-priority patent/KR101633925B1/ko
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Priority to CN2008801184946A priority Critical patent/CN101883964B/zh
Publication of WO2009110664A1 publication Critical patent/WO2009110664A1/fr

Links

Classifications

    • 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
    • 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
    • F28D1/0478—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 the conduits having a non-circular cross-section
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels

Definitions

  • Present embodiments relate to a heat exchanger.
  • a heat exchanger is a device that exchanges heat between internal refrigerant and external fluid.
  • a heat exchanger can function as a condenser or an evaporator in a refrigerant cycle formed of a compressor, condenser, expansion device, and evaporator.
  • Heat exchangers can be categorized into fin-tube type heat exchangers and micro- channel tube type heat exchangers.
  • Fin-tube type heat exchangers include a plurality of fins and a plurality of cylindrical or close-to-cylindrical tubes that pass through the plurality of fins.
  • the micro-channel tube type heat exchangers include a plurality of refrigerant tubes, and a plurality of bent fins provided between the plurality of refrigerant tubes, respectively. Disclosure of Invention Technical Problem
  • Embodiments provide a heat exchanger with improved heat exchanging efficiency.
  • Embodiments also provide a heat exchanger having a refrigerant tube and a return tube that are easily connectable.
  • a heat exchanger includes: two mutually adjacent refrigerant tubes; and a return tube communicating the two refrigerant tubes, wherein the return tube includes two straight portions communicated with the two refrigerant tubes, respectively, and a curved portion having a radius of curvature greater than 1/2 a distance between the two straight portions.
  • a heat exchanger includes: two mutually adjacent refrigerant tubes; and a return tube communicating the two refrigerant tubes, wherein the return tube includes: two straight portions in which the two refrigerant tubes are inserted, respectively; and a curved portion connecting the two straight portions.
  • a heat exchanger includes: two mutually adjacent refrigerant tubes; a return tube communicating the two refrigerant tubes; and a connecting tube with one end in which one of the refrigerant tubes is inserted, and another end in which the return tube is inserted.
  • a return tube is bent to have a radius of curvature exceeding 1/2 the distance between refrigerant tubes, bending of the return tube is facilitated, and the number of the refrigerant tubes can be maximized within a heat exchanger with the same dimensions, so that heat exchanging efficiency of the heat exchanger can be improved.
  • FIG. 1 is a perspective view showing the configuration of a heat exchanger according to a first embodiment.
  • FIG. 2 is a sectional view showing the coupled state of a refrigerant tube and fins according to the first embodiment.
  • FIG. 3 is a perspective view of a return tube according to the first embodiment.
  • FIG. 4 is a sectional view showing a refrigerant tube and a return tube connected at a connecting tube.
  • FIG. 5 is a perspective view of a connecting tube according to the first embodiment.
  • FIG. 6 is a sectional view showing a refrigerant tube and a connector in a coupled state according to the first embodiment.
  • FIG. 7 is a flowchart showing a manufacturing process of a heat exchanger according to present embodiments.
  • FIG. 8 is a perspective view of a return tube according to a second embodiment.
  • FIG. 9 is a sectional view showing a return tube and a refrigerant tube in a coupled state according to the second embodiment.
  • Fig. 1 is a perspective view showing the configuration of a heat exchanger according to a first embodiment
  • Fig. 2 is a sectional view showing the coupled state of a re- frigerant tube and fins according to the first embodiment.
  • a heat exchanger 1 according to present embodiments includes a plurality of fins 12 through which a plurality of refrigerant tubes 10 passes, and a header 13 connected to a portion of the plurality of refrigerant tubes 10.
  • the refrigerant tube 10 is formed in a flattened shape. That is, the refrigerant tube 10 has a cross section substantially flattened in a hexagonal shape.
  • the refrigerant tube 10 includes a tube body 101 constituting its exterior, and a plurality of partitions 103 partitioning the space within the tube body 101 into a plurality of refrigerant passages 102. [26] The entire perimeters of the plurality of refrigerant tubes 10 are passed through the respective fins 12. [27] Also, the refrigerant tube 10 and the fin 12 may be formed of, for example, an aluminum material that has a high heat transfer coefficient. [28] A brazing layer 19 is formed on the contacting surfaces of the refrigerant tube 10 and the fins 12. The brazing layer 19 is formed by heating and melting a sheet-configured brazement coupled or attached to the refrigerant tube 10.
  • the brazing layer 19 fixes the refrigerant tube 10 and the fins 12 together to yield high- strength joints.
  • a clad for example, may be used as a brazement. Here, the melting point of the brazement is lower than those of the refrigerant tube 10 and the fins 12.
  • the plurality of refrigerant tubes 10 is connected through a connector 17 to one of a plurality of capillaries 16, and can be divided into first tubes 111, second tubes 113 connected to the header 13, and one or more intermediate tubes 112 provided between the first tubes 111 and the second tubes 113.
  • the plurality of capillaries 16 is connected to a distributor 18, and the distributor 18 is disposed below the heat exchanger 1.
  • the first tubes 111 and the intermediate tubes 112, and the second tubes 113 and the intermediate tubes 112 are communicated by return tubes 114.
  • the return tubes 114 are communicated by return tubes 114.
  • the respective tubes 111, 112, and 113 are connected by connecting tubes 15.
  • the ends of the respective tubes 111, 112, and 113 and the return tubes 14 are inserted into ends of the connecting tubes 15.
  • the respective tubes 111, 112, and 113 are bent to form two layers.
  • the bends of the respective tubes 111, 112, and 113 may be referred to as bent portions 11.
  • the bent portions 11 have radii of curvatures that are greater than 1/2 the distance between two adjacent tubes.
  • the first tube 111, the intermediate tube 112, and the second tube 113 form one tube unit.
  • a plurality of tube units forms one heat exchanger.
  • the plurality of tube units eacii includes the second tube 113, and it will thus be apparent that the head unit 13 is connected to a plurality of the second tubes 113.
  • the intermediate tube 112 may not be provided, and the first tube 111 and second tube 113 may be connected by a return tube 14; or a plurality of intermediate tubes 112 may be provided. Also, if one or more intermediate tubes 112 are provided, the return tube 14 is provided in a number that exceeds that of the intermediate tubes 112 by one.
  • FIG. 3 is a perspective view of a return tube according to the first embodiment
  • Fig. 4 is a sectional view showing a refrigerant tube and a return tube connected at a connecting tube.
  • the return tube 14 is configured the same as the refrigerant tube 10 while being bent and shaped overall as an open curve.
  • the return tube 14 includes a tube body 141 configuring its exterior, and a plurality of partitions 143 partitioning the space within the tube body 141 into a plurality of refrigerant passages 142.
  • the number of refrigerant passages 142 formed in return tube 14 is the same as the number of refrigerant passages 102 formed in the refrigerant tube 10.
  • the return tube 14 has a cross-sectional shape that is the same as that of the refrigerant tube 10.
  • the tube body 141 has an overall curved, horseshoe shape. That is, the tube body
  • 141 includes one curved portion 141a and two straight portions 141b - one extending from either end of the curved portion 141a.
  • the curved portion 141a is bent to have a radius of curvature (R) that exceeds 1/2 the distance (L: that is substantially the same as the distance between two adjacent refrigerant tubes) between the two straight portions 141b.
  • 141a is formed to be greater than 1/2 the distance (L) between adjacent refrigerant tubes 10, so that the forming of the return tube 14 - that is, the bending of the return tube 14 - can be performed easily.
  • the ends of the refrigerant tube 10 and return tube 14 are inserted into the connecting tube 15.
  • the connecting tube 15 is formed to correspond in shapes at the ends of the refrigerant tube 10 and return tube 14.
  • the inner periphery of the connecting tube 15 is formed in the same size as the outer periphery of the refrigerant tube 10 and return tube 14.
  • a brazing layer 20 is formed between the refrigerant tube 10 and the connecting tube
  • the brazing tube 20 is formed by heating and melting a brazement.
  • the brazing layer 20 firmly fixes the refrigerant tube 10 and the connecting tube 15 and the connecting tube 15 and the return tube 14.
  • the brazement as described above, may be a clad.
  • the melting point of the brazement is lower than the melting points of the refrigerant tube 10, return tube 14, and connecting tube 15.
  • the brazement is coupled or attached to the circumferences of the refrigerant tube 10 and the return tube 14 at a position a predetermined distance from the ends of the refrigerant tube 10 and return tube 14.
  • a coating layer 21 is formed on the respective ends of the refrigerant tube 10 and the return tube 14.
  • the coating layer 21 prevents the melted brazement from entering into the space between the refrigerant tube 10 and the return tube 14.
  • the brazing layer 20 may be partially formed on the outside of the coating layer 21.
  • the coating layer may first be formed on the ends of the refrigerant tube
  • brazement is attached or coupled around the perimeters of the refrigerant tube
  • a coating layer 21 is formed on the respective ends of the refrigerant tube 10 and the return tube 14. The sequence of forming the coating layer 21 and the coupling of the refrigerant tube 10 and the return tube 14 may be reversed.
  • the coating layer 21 is formed of a coating material (such as oil) that is painted or sprayed onto the refrigerant tube 10 and return tube 14.
  • FIG. 5 is a perspective view of a connecting tube according to the first embodiment
  • Fig. 6 is a sectional view showing a refrigerant tube and a connector in a coupled state according to the first embodiment.
  • the connector 17 connects a portion (the first tube 111 in Fig. 1) of the refrigerant tube 10 and a cylindrical capillary 16. That is, the connector 17 connects the refrigerant tube 10 to a differently- shaped capillary 16.
  • the connector 17 includes a first connector 170a to which the refrigerant tube 10 is coupled, and a second connector 170b to which the capillary 16 is coupled.
  • the first connector 170a has an opening 172 formed to insert the refrigerant tube 10 into.
  • the opening 172 is shaped to correspond to the shape of the refrigerant tube 10.
  • One surface of the second connector 170b defines a coupling hole 131 for coupling the capillary 16 to.
  • the cross-sectional area of the first connector 170a is formed greater than the cross- sectional area of the second connector 170b.
  • a catch portion 173 is formed in the inside of the connector 17, that is, in the connecting portion between the first connector 170a and the second connector 170b.
  • the refrigerant discharged from the connector 16 enters the inner space of the second connector 170b and is then supplied to the refrigerant tube 10, so that refrigerant can be sufficiently supplied to each refrigerant passage (10P) of the refrigerant tube 10.
  • the thickness of the catch portion 173 may be formed corresponding to the thickness of the refrigerant tube 10.
  • a brazing layer 22 may be formed at the connecting portion of the first connector 170a and the refrigerant tube 10.
  • FIG. 7 is a flowchart showing a manufacturing process of a heat exchanger according to present embodiments.
  • a plurality of refrigerant tubes 10 and a plurality of fins 12 are formed. Then, brazement is coupled or attached to the circumferences of the refrigerant tubes 10. Next, the refrigerant tubes 10 with the brazement attached thereto are inserted through the fins 12 in operation SI l.
  • first tubes 111 and intermediate tubes 112, and the second tubes 113 and the return tubes 14 are coupled to the connecting tubes 15, respectively, in operation S 13.
  • a coating layer 21 is formed on each of the tubes 111, 112, 113, and return tubes 14, with the brazement coupled or attached thereto.
  • the ends of the first tubes 111 are coupled in operation S 15 to the connectors 17.
  • refrigerant tubes 10, return tubes 14, connecting tubes 15, and connectors 17 may be heated to a temperature of approximately 58O 0 C - 612 0 C.
  • the process of heating the refrigerant tubes 10, return tubes 14, connecting tubes 15, and connectors 17 is to heat and melt the brazement.
  • a brazing layer 19 is formed between the refrigerant tubes 10 and the fins 12 to fix the refrigerant tubes 10 to the fins 12.
  • brazing layers 20 are formed between the refrigerant tubes 10 and connecting tubes 15, and between the connecting tubes 15 and the return tubes 14, to fix the re- frigerant tubes 10 and the connecting tubes 15, and the connecting tubes 15 and the return tubes 14.
  • brazing layers 22 are formed between the connectors 17 and the refrigerant tubes 10 to fix the latter together.
  • the leakage inspection is performed through circulating a fluid having a predetermined pressure, for example, 20kg/cnf of pressure, through the inside of the heat exchanger and detecting for leaks.
  • refrigerant If refrigerant is completely condensed as it passes through the condenser, the refrigerant is in a liquid state. However, refrigerant that passes through the condenser cannot be completely liquified, and is in a two-phase state of both liquid and gas.
  • the refrigerant that flows to each of the capillaries 16 undergoes an expansion process, and the expanded refrigerant flows into each of the first tubes 111.
  • the refrigerant that flows into each of the first tubes 111 flows sequentially through an intermediate tube 112 and a second tube 113 to be evaporated, after which it flows into the header 13.
  • FIG. 8 is a perspective view of a return tube according to a second embodiment
  • Fig. 9 is a sectional view showing a return tube and a refrigerant tube in a coupled state according to the second embodiment.
  • a return tube 23 includes one curved portion 231 and two straight portions 233.
  • the curved portion 231 is bent to have a radius of curvature (R) greater than 1/2 the distance (L) between two adjacent refrigerant tubes.
  • the two straight portions 233 are disposed at either end of the curved portion 231, respectively.
  • the straight portions 233 have one end of one of two adjacent refrigerant tubes 10 inserted therein, respectively. Accordingly, the respective straight portions 233 are formed to have a comparatively larger cross-sectional area than the refrigerant tubes 10.
  • a plurality of refrigerant passages 232 is provided within the curved portions
  • the refrigerant passages 232 of the curved portion 231 are communicated with the refrigerant passages 102 of the refrigerant tubes 10, respectively.
  • a plurality of partitions 234 is provided in the space within the curved portion 231 to partition the inner space of the curved portion 231 into the plurality of refrigerant passages 232.
  • a brazing layer 24 may be formed on the return tube 23, or more specifically, on the portion connecting each straight portion 233 and each refrigerant tube 10. That is, the return tube 23 and the respective refrigerant tubes 10 may be coupled through brazing.
  • the brazing layer may be referred to as a fixing layer.
  • exemplary embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.

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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

L'invention concerne un échangeur de chaleur. L'échangeur de chaleur comprend deux tubes mutuellement adjacents pour fluide frigorigène, et un tube de retour en communication avec les deux tubes pour fluide frigorigène. Le tube de retour comprend deux parties droites en communication avec les deux tubes pour fluide frigorigène, respectivement, et une partie courbe ayant un rayon de courbure supérieur à la moitié d'une distance entre les deux parties droites.
PCT/KR2008/004050 2008-03-07 2008-07-09 Échangeur de chaleur WO2009110664A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008801184946A CN101883964B (zh) 2008-03-07 2008-07-09 热交换器

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2008-0021355 2008-03-07
KR1020080021355A KR101380078B1 (ko) 2008-03-07 2008-03-07 리턴튜브 및 이를 포함하는 열교환기
KR10-2008-0034434 2008-04-15
KR1020080034434A KR101633925B1 (ko) 2008-04-15 2008-04-15 열교환기

Publications (1)

Publication Number Publication Date
WO2009110664A1 true WO2009110664A1 (fr) 2009-09-11

Family

ID=41056205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/004050 WO2009110664A1 (fr) 2008-03-07 2008-07-09 Échangeur de chaleur

Country Status (2)

Country Link
CN (1) CN101883964B (fr)
WO (1) WO2009110664A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3388770A4 (fr) * 2015-12-09 2019-07-10 Zhejiang Sanhua Automotive Components Co., Ltd. Échangeur de chaleur

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10448545B2 (en) * 2015-03-10 2019-10-15 Hanon Systems Heat exchanger for cooling electrical element
CN107289676B (zh) * 2016-03-31 2020-09-25 杭州三花研究院有限公司 换热器及车辆空调系统
CN107289677B (zh) * 2016-03-31 2020-09-25 杭州三花研究院有限公司 换热器及co2冷却系统
CN106855369B (zh) * 2015-12-09 2020-05-22 浙江三花汽车零部件有限公司 一种换热器
CN108981436A (zh) * 2017-06-02 2018-12-11 美的集团股份有限公司 换热器和热水器
CN108981437A (zh) * 2017-06-02 2018-12-11 美的集团股份有限公司 换热器和热水器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05215488A (ja) * 1992-02-04 1993-08-24 Matsushita Refrig Co Ltd 配管用接続管と配管用接続管を備えた熱交換器
JPH10103624A (ja) * 1996-09-26 1998-04-21 Taihei Kinzoku Kogyo Kk 加熱炉用ラジアントチューブ
JP2001202187A (ja) * 2000-01-24 2001-07-27 Seiko Epson Corp 電子機器及び電子機器の制御方法
KR20040008343A (ko) * 2002-07-18 2004-01-31 주식회사 케스 휜앤 플랫 튜브형 열교환기 및 이를 이용한 증발기

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05215488A (ja) * 1992-02-04 1993-08-24 Matsushita Refrig Co Ltd 配管用接続管と配管用接続管を備えた熱交換器
JPH10103624A (ja) * 1996-09-26 1998-04-21 Taihei Kinzoku Kogyo Kk 加熱炉用ラジアントチューブ
JP2001202187A (ja) * 2000-01-24 2001-07-27 Seiko Epson Corp 電子機器及び電子機器の制御方法
KR20040008343A (ko) * 2002-07-18 2004-01-31 주식회사 케스 휜앤 플랫 튜브형 열교환기 및 이를 이용한 증발기

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3388770A4 (fr) * 2015-12-09 2019-07-10 Zhejiang Sanhua Automotive Components Co., Ltd. Échangeur de chaleur
US10520258B2 (en) 2015-12-09 2019-12-31 Zhejiang Sanhua Automotive Components Co., Ltd. Heat exchanger

Also Published As

Publication number Publication date
CN101883964B (zh) 2012-07-04
CN101883964A (zh) 2010-11-10

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