WO2015027680A1 - 换热器 - Google Patents

换热器 Download PDF

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Publication number
WO2015027680A1
WO2015027680A1 PCT/CN2014/070732 CN2014070732W WO2015027680A1 WO 2015027680 A1 WO2015027680 A1 WO 2015027680A1 CN 2014070732 W CN2014070732 W CN 2014070732W WO 2015027680 A1 WO2015027680 A1 WO 2015027680A1
Authority
WO
WIPO (PCT)
Prior art keywords
fins
fin
heat exchanger
width
flat tube
Prior art date
Application number
PCT/CN2014/070732
Other languages
English (en)
French (fr)
Inventor
何延
刘华钊
高强
Original Assignee
杭州三花微通道换热器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 杭州三花微通道换热器有限公司 filed Critical 杭州三花微通道换热器有限公司
Priority to EP14840139.1A priority Critical patent/EP3040667B1/en
Priority to US14/914,489 priority patent/US10539373B2/en
Priority to JP2016537088A priority patent/JP6185669B2/ja
Publication of WO2015027680A1 publication Critical patent/WO2015027680A1/zh

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
    • F28F1/126—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 consisting of zig-zag shaped fins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
    • 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
    • F28D1/0471—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 having a non-circular cross-section
    • 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
    • F28D1/053—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 straight
    • F28D1/0535—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 straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • 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
    • F28D2001/0253—Particular components
    • F28D2001/026—Cores
    • F28D2001/0273—Cores having special shape, e.g. curved, annular
    • 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
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the present invention relates to a heat exchanger, and in particular to a parallel flow heat exchanger. Background technique
  • heat exchangers bent along a header take various measures in the bending region to avoid adverse effects of bending on heat transfer performance, such as bending.
  • Flat tubes and fins are not provided in the area, but are blocked by baffles, or flat tubes are provided in the bending area, profiles are supported and connected between the flat tubes, or in the bending area, the fins are welded on one side and the flat tubes .
  • the heat exchanger with baffle in the bending area has no supporting structure in the bending area during bending, and there is no heat exchange fin, the structural stability of the heat exchanger is poor, and the heat transfer performance is reduced;
  • the profile is supported and connected to increase the wind resistance.
  • the fins used for heat exchange are reduced, which affects the overall heat transfer performance of the product.
  • the welding of the fins on one side and the flat tube will cause a part of the flat tube in the bending area to be ineffective.
  • the fins are used for heat exchange, and since the flat tubes are not connected to the fins, the fins are not supported in strength, and the fins are not protected from corrosion, which reduces the life of the heat exchanger; In addition, reducing the width of the fins in the bend region causes the outer side of the bend of the fin to tear, and the inner side of the bend is excessively deformed. Summary of the invention
  • an object of the present invention is to provide a heat exchanger which can reduce tearing and extrusion deformation of a fin during bending, and reduces the influence of bending on the performance of the heat exchanger.
  • a heat exchanger comprising: a first header and a second header; a plurality of flat tubes, the two ends of the flat tube being respectively associated with the first header and the first The two headers are connected, and the plurality of flat tubes are spaced apart from each other along the axial direction of the first header and the second header; the fins are disposed between adjacent flat tubes,
  • the heat exchanger has a bending section and a straight section adjacent to the bending section, the fins in the straight section are first fins, and the fins in the bending section are divided into second fins and a third fin, a width of the second fin is greater than a width of the third fin, and the second fin and the third fin are alternately disposed along the axial direction.
  • the fins of the bent section are bent at the same time by alternately arranging the second fin and the third fin along the axial direction of the first header and the second header.
  • the amount of compression on the inside and the amount of elongation on the outside of the bend, so that after the heat exchanger is bent, the fin will not be torn on the outside of the bend, and the compression deformation inside the bend is small, and the heat transfer performance is reduced.
  • the loss effectively avoids tearing and severe squeezing deformation between the fin and the flat tube of the heat exchanger during bending.
  • the flat tubes of the entire heat exchanger are directly connected with fins, which improves the heat exchange effect, and has no loss of wind volume and increased wind resistance, thereby improving performance.
  • the fins are connected between the flat tubes, which greatly reduces the chance of corrosion of the flat tubes.
  • the second fin and the third fin are in a manner that one second fin is followed by a third fin, and two second fins are followed by a third fin.
  • Way a way in which the second fin is connected to the two third fins, At least one of the manner in which the two second fins are connected to the two third fins is alternately disposed.
  • the ratio of the number of the second fins to the number of the third fins is in the range of 1/3 to 3.
  • the width of the second fin is equal to the width of the first fin.
  • the center lines of the first to third fins extending in the thickness direction of the flat tube coincide with each other in a plane orthogonal to the longitudinal direction of the flat tube.
  • the ratio of the width of the flat tube to the width of the fin is less than or equal to two.
  • a ratio of a width of the second fin to a width of the flat tube is greater than 0.75 and less than or equal to 1, and a width of the third fin is different from that of the flat tube The ratio of the width is less than or equal to 0.75.
  • a ratio of a width of the third fin to a width of the second fin is greater than or equal to
  • a center line of the second fin extending in a thickness direction of the flat tube and a center line of the third fin extending in a thickness direction of the flat tube are The flat tubes are staggered from each other in a plane orthogonal to the longitudinal direction.
  • a heat exchanger comprising: a first header and a second header; a plurality of flat tubes, the two ends of the flat tube being respectively associated with the first header and the Two manifolds are connected, and a plurality of the flat tubes are spaced apart from each other along an axial direction of the first header and the second header;
  • the fin being disposed between adjacent flat tubes
  • the heat exchanger has a bent section and a straight section adjacent to the bent section, and the fin in the straight section is the first fin
  • a fin in the bent section is divided into a second fin and a third fin, a center line of the second fin extending along a thickness direction of the flat tube and the third fin along the The center lines extending in the thickness direction of the flat tubes are shifted from each other in a plane orthogonal to the longitudinal direction of the flat tubes.
  • the second fin and the third fin are in a manner that one second fin is followed by a third fin, and two second fins are followed by a third fin. In a manner, at least one of the manner in which one second fin is connected to the two third fins, and the manner in which the two second fins are connected to the two third fins are alternately disposed.
  • the widths of the second fin and the third fin are different from each other.
  • the ratio of the number of the second fins to the number of the third fins is in the range of 1/3 to 3.
  • the ratio of the width of the flat tube to the width of the fin is greater than two.
  • a heat exchanger by alternately arranging second fins and third fins having different widths in a bent section along an axial direction of the first header and the second header, or a center line of the second fin in the thickness direction of the flat tube and a center line of the third fin in the thickness direction of the flat tube are offset from each other in the thickness direction of the flat tube, and the fold is taken into consideration
  • the amount of compression of the fins in the curved section on the inside of the bend and the elongation on the outside of the bend, so that after the heat exchanger is bent, the fins are not torn on the outside of the bend, and the compression on the inside of the bend The deformation is small, the heat transfer performance loss is reduced, and the tear and severe crush deformation between the fin and the flat tube of the heat exchanger during bending are effectively avoided.
  • the flat tubes of the entire heat exchanger are directly connected with fins, which improves the heat exchange effect, and has no loss of wind volume and increased wind resistance, thereby improving performance.
  • the fins are connected between the flat tubes, which greatly reduces the chance of corrosion of the flat tubes.
  • FIG. 1 is a schematic view of a heat exchanger in accordance with an embodiment of the present invention.
  • FIG 2 is a schematic view of a heat exchanger prior to bending according to an embodiment of the present invention.
  • Figure 3 is a partial top plan view of the upper header of the heat exchanger in accordance with one embodiment of the present invention, showing a bend section.
  • Figure 4 is a schematic view of the bent section shown in Figure 3 after deployment.
  • Figure 5 is a schematic illustration of a folded section of a heat exchanger after deployment in accordance with another embodiment of the present invention.
  • Figure 6 is a schematic illustration of a bend section of a heat exchanger after deployment in accordance with yet another embodiment of the present invention.
  • Fig. 7 is a partial top plan view showing the upper header of the heat exchanger according to another embodiment of the present invention, showing a bent section.
  • Figure 8 is a schematic view of the bent section shown in Figure 7 after deployment.
  • a heat exchanger according to an embodiment of the present invention includes: a first header 1, a second header 2, a flat tube 3 and fins 4.
  • One end of the flat tube 3 (the upper end in FIGS. 1 and 2) is connected to the first header 1, and the other end of the flat tube 3 (the lower end in FIGS. 1 and 2) is connected to the second header 2, thereby communicating A header 1 and a second header 2.
  • the fins 4 are disposed between adjacent flat tubes 3.
  • the first header 1 and the second header 2 extend substantially in parallel along the longitudinal direction of the heat exchanger (ie, the thickness direction of the flat tubes, the axial directions of the first header 1 and the second header 2) X And spaced apart from each other, the plurality of flat tubes 3 are spaced apart from each other in the X direction.
  • Each flat tube 3 extends along the height direction of the heat exchanger (ie, the length direction of the flat tube) Y.
  • the length direction of the flat tube 3 is aligned with the height direction of the heat exchanger, the thickness direction of the flat tube 3 and the heat exchanger
  • the longitudinal direction and the axial direction of the first header 1 and the second header 2 coincide, and the width direction of the flat tube 3 and the width direction of the fin 4 are aligned with the thickness direction Z of the heat exchanger.
  • the heat exchanger has a bent section S and a straight section T adjacent to the bent section S, and the fins in the straight section are the first fins 41, and the fins in the bent section S
  • the second fin 42 and the third fin 43 are divided, the width HI of the second fin 42 is larger than the width of the third fin 43, and the second fin 42 and the third fin 43 are alternately arranged in the X direction.
  • the heat exchanger has three bent sections S and four straight sections T, and the present invention is not limited thereto.
  • the heat exchanger can have any suitable number of bend segments S depending on the application.
  • the heat exchanger according to an embodiment of the present invention alternates between the second fins 42 having different widths and the third fins 43 in the axial direction of the first header 2 and the second header 2 in the bent section
  • the setting considers the amount of compression of the fins on the inside of the bend and the amount of elongation on the outside of the bend, so that after the heat exchanger is bent, the fins are not torn at the outside of the bend.
  • the compression deformation on the inner side of the bend is small, the heat transfer performance loss is reduced, and the tear and severe crush deformation between the fin and the flat tube when the heat exchanger is bent are effectively avoided.
  • the flat tubes of the entire heat exchanger are directly connected with fins, which improves the heat exchange effect, and has no loss of wind volume and increased wind resistance, thereby improving performance.
  • the fins are connected between the flat tubes, which greatly reduces the chance of corrosion of the flat tubes.
  • the alternate arrangement of the second fins 42 and the third fins 43 should be understood in a broad sense, for example, in the direction X, from left to right, one second fin 42 followed by one or more third fins. 43. Similarly, a third fin 43 can be followed by one or more second fins 42.
  • FIG. 3 is a partial top plan view showing the heat removal of the heat exchanger according to an embodiment of the present invention, in which a bent section is shown.
  • Figure 4 is a schematic view of the bent section shown in Figure 3 after deployment.
  • the second fins 42 and the third fins 43 are alternately arranged in such a manner that one second fin 42 is followed by a third fin 43.
  • one second fin 42 is followed by a second fin 42
  • the third fin 43 is disposed, and a third fin 43 is followed by a second fin 42.
  • the center line L2 of the second fin 42 extending in the thickness direction X of the flat tube 3 and the center line L3 of the third fin 43 extending in the thickness direction X of the flat tube 3 are at The plane orthogonal to the longitudinal direction Y of the flat tube (e.g., the horizontal planes in Figs. 1 and 2, and the plane orthogonal to the observer's line of sight in Fig. 3) coincide with each other.
  • the center lines L1, L2 and L3 of the first fin 41, the second fin 42 and the third fin 43 extending in the thickness direction of the flat tube 3 coincide with each other.
  • the present invention is not limited thereto, for example, the center line L2 of the second fin 42 extending in the thickness direction X of the flat tube 3 and the center line L3 of the third fin 43 extending in the thickness direction X of the flat tube 3 are They are offset from each other in a plane orthogonal to the longitudinal direction Y of the flat tubes.
  • the center line L2 of the second fin 42 extending in the thickness direction X of the flat tube 3 is located at the first fin 41 extending in the thickness direction X of the flat tube 3.
  • the center line L3 of the third fin 43 extending in the thickness direction X of the flat tube 3 is located above the center line L1 of the first fin 41 extending in the thickness direction X of the flat tube 3.
  • the width HI of the second fin 42 is equal to the width of the first fin 41, whereby the width HI of the second fin 42 and the width of the first fin 41 are both greater than The width F2 of the third fin 43.
  • the second fins 42 and the third fins 43 are alternately arranged in such a manner that the two second fins 42 are followed by the two third fins 43.
  • two second fins 42 are disposed adjacent to each other, and then two third fins 43 are disposed, and then two second fins 42 are disposed.
  • the second fins 42 and the third fins 43 are disposed in such a manner that one second fin 42 is followed by two third fins 43.
  • the alternate arrangement of the second fins 42 and the third fins 43 is not limited to the above manner, for example, It can be set in a combination of the above.
  • the ratio of the number of second fins 42 to the number of third fins 43 is in the range of 1/3 to 3.
  • the ratio of the width of the flat tube 3 to the width of the fins 4 is greater than or equal to two. More specifically, the ratio of the width of the second fin 42 to the width of the flat tube 3 is greater than 0.75 and less than or equal to 1, and the ratio of the width of the third fin 43 to the width of the flat tube 3 is less than or equal to 0.75.
  • the ratio of the width of the third fin 43 to the width of the second fin is greater than or equal to 0.4 and less than 1.
  • the inventors of the present application have unexpectedly found that by the above measures, the heat exchange performance can be further improved, and the tear and back pressure deformation of the fin can be reduced.
  • the ratio of the width of the flat tube 3 to the width of the fin 4 is 2 or more, the second fin 42 and the third fin 43 are alternately arranged in the X direction, which can further prevent the fin from being torn and severe. Squeeze deformation.
  • FIG. 7 is a partial top plan view showing the heat removal of the heat exchanger according to another embodiment of the present invention, in which a bent section is shown.
  • Figure 8 is a schematic view of the bent section shown in Figure 7 after deployment.
  • the center line L2 of the second fin 42 extending in the thickness direction X of the flat tube 3 and the third fin 43 are along the thickness direction of the flat tube 3.
  • the center line L3 of the X extension is shifted from each other in a plane orthogonal to the longitudinal direction Y of the flat tube 3.
  • the heat exchanger according to the embodiment of the present invention is formed by flattening the center line of the second fin 42 in the thickness direction X of the flat tube 3 and the center line of the third fin 43 extending in the thickness direction X of the flat tube 3
  • the longitudinal direction Y of the tube 3 is offset from each other in a plane orthogonal to each other, and the amount of compression of the fins on the inside of the bend and the amount of elongation outside the bend are considered, so that after the heat exchanger is bent, the fins are The sheet is not torn at the outside of the bend, and the compression deformation on the inside of the bend is small, the heat transfer performance loss is reduced, and the tear between the fin and the flat tube when the heat exchanger is bent is effectively avoided. Severe squeezing deformation.
  • the first fin 41, the second fin 42 and the third fin 43 have the same width.
  • the second fins 42 and the third fins 43 may have different widths and be smaller than the width of the first fins 41.
  • the arrangement of the second fins 42 and the third fins 43 may be the same as that described with reference to Figures 3-6 and will not be described in detail herein.
  • the ratio of the number of the second fins 42 to the number of the third fins 43 is in the range of 1/3 to 3, the width of the flat tube 3 and the width of the fins 4. The ratio is less than 2.
  • the center line of the second fin 42 extending in the thickness direction X of the flat tube 3 and the third fin 43 are along the flat tube 3
  • the center lines extending in the thickness direction X are shifted from each other in a plane orthogonal to the longitudinal direction Y of the flat tube 3, which can further avoid tearing of the fins and severe crush deformation, and further improve heat exchange efficiency.
  • the fin after the bending, the fin is not torn at the outer side of the bend, the compression deformation inside the bend is small, the heat transfer performance loss is reduced, and the heat exchanger is effectively avoided. Tearing and extrusion deformation between the fins and the flat tube during bending. Moreover, the flat tubes of the entire heat exchanger are directly connected with fins, which improves the heat exchange effect, and has no loss of wind volume and increased wind resistance, thereby improving performance. The fins are connected between the flat tubes, which greatly reduces the chance of corrosion of the flat tubes.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first”, “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more, unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like are to be understood broadly, and may be either a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. , or integrated; can be mechanical connection, or electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements.
  • installation can be understood by one of ordinary skill in the art based on the specific circumstances.
  • the first feature "on” or “below” the second feature may be the direct contact of the first and second features, or the first and second features may be indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.
  • the description of the terms “one embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” and the like means a specific feature described in connection with the embodiment or example.
  • a structure, material or feature is included in at least one embodiment or example of the invention.
  • the schematic representation of the above terms is not necessarily directed to the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Further, various embodiments or examples described in this specification may be combined and combined by those skilled in the art.

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

Abstract

一种换热器，包括：第一集流管（1）、第二集流管（2）和多个扁管（3），扁管（3）的两端分别与第一集流管（1）和第二集流管（2）相连且彼此间隔布置；翅片（4）设在相邻的扁管（3）之间，换热器具有折弯段（S）和与折弯段（S）邻接的直线段（T），直线段（T）内的翅片（4）为第一翅片（41），折弯段内的翅片（4）分为第二翅片（42）和第三翅片（43），第二翅片（42）的宽度大于第三翅片（43）的宽度，且第二翅片（42）和第三翅片（43）沿轴向方向交替设置。该换热器在折弯后，翅片（4）在折弯外侧不会被撕裂，在折弯内侧的压缩变形小，减少了换热性能损失，有效避免了热交换器在折弯时的翅片（4）与扁管（3）之间的撕裂和挤压变形，提高了换热效果，且没有风量损失和风阻增大，提高了性能。

Description

换热器 技术领域
本发明涉及一种换热器， 具体地， 涉及一种平行流换热器。 背景技术
在相关技术领域内， 沿集流管弯曲成型的换热器， 例如微通道换热器，在折弯区域采取 多种措施， 以避免折弯对换热性能带来的不利影响， 如折弯区域内不设置扁管和翅片， 而 用挡板遮挡， 或在折弯区域设置扁管， 扁管之间采用型材进行支撑和连接， 或在折弯区域， 翅片单侧与扁管焊接。
但是， 上述措施仍然存在一些问题。 在折弯区域采用挡板的换热器， 折弯时折弯区域 内无支撑结构， 也无换热翅片， 换热器的结构稳定性差， 且换热性能降低； 在扁管之间采 用型材进行支撑和连接， 增大了风阻， 用于换热的翅片减少， 影响了产品的整体换热性能; 翅片单侧与扁管焊接， 会造成折弯区域内的一部分扁管无法有效的利用翅片进行换热， 而 且由于这一部分扁管不与翅片连接， 在强度上得不到翅片的支撑， 在腐蚀上得不到翅片的 保护， 会降低换热器的寿命； 此外， 减小折弯区域内的翅片宽度， 会导致翅片的折弯外侧 撕裂， 折弯内侧挤压变形过大。 发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。 为此， 本发明的一个 目的在于提出一种换热器， 该换热器在折弯时可以减少翅片的撕裂和挤压变形， 降低了折 弯对换热器性能的影响
根据本发明第一方面实施例的换热器， 包括： 第一集流管和第二集流管； 多个扁管， 所述扁管的两端分别与所述第一集流管和第二集流管相连， 多个所述扁管沿所述第一集流 管和第二集流管的轴向彼此间隔布置； 翅片， 所述翅片设在相邻的扁管之间， 其中所述换 热器具有折弯段和与折弯段邻接的直线段， 所述直线段内的翅片为第一翅片， 所述折弯段 内的翅片分为第二翅片和第三翅片， 所述第二翅片的宽度大于所述第三翅片的宽度， 且所 述第二翅片和所述第三翅片沿所述轴向方向交替设置。
根据本发明实施例的换热器， 通过将第二翅片与第三翅片沿第一集流管和第二集流管 的轴向交替设置， 兼顾了折弯段的翅片在折弯内侧的压縮量和折弯外侧的伸长量， 从而在 换热器折弯后， 翅片在折弯外侧不会被撕裂， 在折弯内侧的压縮变形小， 减少了换热性能 损失， 有效避免了热交换器在折弯时的翅片与扁管之间的撕裂和严重的挤压变形。
而且， 整个换热器的扁管直接均连接有翅片， 提高了换热效果， 且没有风量损失和风 阻增大， 提高了性能。 扁管之间均连接有翅片， 大大降低了扁管腐蚀的几率。
在本发明的一些实施例中， 所述第二翅片和所述第三翅片以一个第二翅片接一个第三 翅片的方式、两个第二翅片接一个第三翅片的方式、一个第二翅片接两个第三翅片的方式、 两个第二翅片接两个第三翅片的方式中的至少一个方式交替设置。
在本发明的一些实施例中，所述第二翅片的数量与所述第三翅片的数量之比在 1/3到 3 的范围内。
在本发明的一些实施例中， 所述第二翅片的宽度等于所述第一翅片的宽度。
在本发明的一些实施例中， 所述第一至第三翅片的沿所述扁管的厚度方向延伸的中心 线在与所述扁管的长度方向正交的平面内彼此重合。
在本发明的一些实施例中， 所述扁管的宽度与所述翅片的宽度之比小于等于 2。
在本发明的一些实施例中，所述第二翅片的宽度与所述扁管的宽度之比大于 0. 75且小 于等于 1， 且所述第三翅片的宽度与所述扁管的宽度之比小于等于 0. 75。
在本发明的一些实施例中， 所述第三翅片的宽度与所述第二翅片的宽度之比大于等于
0. 4且小于 1。
在本发明的一些实施例中， 所述第二翅片沿所述扁管的厚度方向延伸的中心线与所述 第三翅片沿所述扁管的厚度方向延伸的中心线在与所述扁管的长度方向正交的平面内彼此 错开。
根据本发明第二方面实施例的换热器， 包括： 第一集流管和第二集流管； 多个扁管， 所述扁管的两端分别与所述第一集流管和第二集流管相连， 多个所述扁管沿所述第一集流 管和第二集流管的轴向彼此间隔布置；
翅片， 所述翅片设在相邻的扁管之间， 其中所述换热器具有折弯段和与折弯段邻接的 直线段， 所述直线段内的翅片为第一翅片， 所述折弯段内的翅片分为第二翅片和第三翅片， 所述第二翅片沿所述扁管的厚度方向延伸的中心线与所述第三翅片沿所述扁管的厚度方向 延伸的中心线在与所述扁管的长度方向正交的平面内彼此错开。
在本发明的一些实施例中， 所述第二翅片和所述第三翅片以一个第二翅片接一个第三 翅片的方式、两个第二翅片接一个第三翅片的方式、一个第二翅片接两个第三翅片的方式、 两个第二翅片接两个第三翅片的方式中的至少一个方式交替设置。
在本发明的一些实施例中， 所述第二翅片和所述第三翅片的宽度彼此不同。
在本发明的一些实施例中，所述第二翅片的数量与所述第三翅片的数量之比在 1/3到 3 的范围内。
在本发明的一些实施例中， 所述扁管的宽度与所述翅片的宽度之比大于 2。
根据本发明实施例的换热器， 通过将折弯段内的具有不同宽度的第二翅片与第三翅片 沿第一集流管和第二集流管的轴向交替设置， 或将第二翅片在所述扁管的厚度方向上的中 心线与所述第三翅片在所述扁管的厚度方向上的中心线在所述扁管的厚度方向上彼此错 开， 兼顾了折弯段的翅片在折弯内侧的压縮量和折弯外侧的伸长量， 从而在换热器折弯后， 翅片在折弯外侧不会被撕裂， 在折弯内侧的压縮变形小， 减少了换热性能损失， 有效避免 了热交换器在折弯时的翅片与扁管之间的撕裂和严重的挤压变形。
而且， 整个换热器的扁管直接均连接有翅片， 提高了换热效果， 且没有风量损失和风 阻增大， 提高了性能。 扁管之间均连接有翅片， 大大降低了扁管腐蚀的几率。 附图说明
图 1是根据本发明实施例的换热器的示意图。
图 2是根据本发明实施例的换热器折弯之前的示意图。
图 3是根据本发明一个实施例的换热器的去除上部的集流管的局部俯视示意图， 其中 示出了一个折弯段。
图 4是图 3所示的折弯段展开之后的示意图。
图 5是根据本发明另一实施例的换热器的折弯段展开之后的示意图。
图 6是根据本发明再一实施例的换热器的折弯段展开之后的的示意图。
图 7是根据本发明另一个实施例的换热器的去除上部的集流管的局部俯视示意图， 其 中示出了一个折弯段。
图 8是图 7所示的折弯段展开之后的示意图。
附图标记：
第一集流管 1 ; 第二集流管 2; 扁管 3; 翅片 4; 第一翅片 41 ; 第二翅片 42 ; 第三翅片 43； 折弯段 S; 直线段 T; 换热器长度方向 （扁管厚度方向） X； 换热器高度方向 Y; 换热 器厚度方向 （扁管和翅片的宽度方向） Z; 第二翅片宽度 HI ; 第三翅片宽度 H2; 具体实施方式
下面详细描述本发明的实施例， 所述实施例的示例在附图中示出， 其中自始至终相同 或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 下面通过参考附图描 述的实施例是示例性的， 旨在用于解释本发明， 而不能理解为对本发明的限制。
下面参考附图描述根据本发明一个实施例的换热器。 如图 1-4所示， 根据本发明实施 例的换热器包括： 第一集流管 1， 第二集流管 2， 扁管 3和翅片 4。
扁管 3的一端（图 1和 2中的上端）与第一集流管 1相连， 扁管 3的另一端（图 1和 2 中的下端） 与第二集流管 2相连， 从而连通第一集流管 1和第二集流管 2。 翅片 4设在相 邻的扁管 3之间。
第一集流管 1和第二集流管 2沿换热器长度方向 （即扁管的厚度方向， 第一集流管 1 和第二集流管 2的轴向方向） X大体平行地延伸且彼此间隔开， 多个扁管 3沿 X方向彼此 间隔布置。 每个扁管 3沿换热器高度方向 （即扁管的长度方向） Y延伸， 换言之， 扁管 3 的长度方向与换热器高度方向 Y—致， 扁管 3的厚度方向与换热器长度方向以及第一集流 管 1和第二集流管 2的轴向一致， 扁管 3的宽度方向和翅片 4的宽度方向与换热器的厚度 方向 Z—致。
如图 1和 2所示，换热器具有折弯段 S和与折弯段 S邻接的直线段 T，直线段 Τ内的翅 片为第一翅片 41， 折弯段 S内的翅片分为第二翅片 42和第三翅片 43， 第二翅片 42的宽度 HI大于第三翅片 43的宽度， 且第二翅片 42和第三翅片 43沿 X方向交替设置。
在图 1所示的实施例中，换热器具有三个折弯段 S和四个直线段 T，本发明并不限于此， 换热器可以根据应用， 换热器可以具有任何合适数量的折弯段 S。
根据本发明实施例的换热器，通过将折弯段内的具有不同宽度的第二翅片 42与第三翅 片 43沿第一集流管 1和第二集流管 2的轴向交替设置， 同时考虑了折弯段的翅片在折弯内 侧的压縮量和折弯外侧的伸长量， 从而在换热器折弯后， 翅片在折弯外侧不会被撕裂， 在 折弯内侧的压縮变形小， 减少了换热性能损失， 有效避免了热交换器在折弯时的翅片与扁 管之间的撕裂和严重的挤压变形。
而且， 整个换热器的扁管直接均连接有翅片， 提高了换热效果， 且没有风量损失和风 阻增大， 提高了性能。 扁管之间均连接有翅片， 大大降低了扁管腐蚀的几率。
需要理解的是， 第二翅片 42和第三翅片 43交替设置应作广义理解， 例如， 沿方向 X， 从左向右， 一个第二翅片 42后面接着一个或多个第三翅片 43， 同理， 一个第三翅片 43可 以接着一个或多个第二翅片 42。
下面参考图 3和 4描述根据本发明一个优选示例的换热器。 图 3是根据本发明一个实 施例的换热器的去除第一集流管的局部俯视示意图， 其中示出了一个折弯段。 图 4是图 3 所示的折弯段展开之后的示意图。
如图 3和图 4所示， 第二翅片 42和第三翅片 43以一个第二翅片 42接一个第三翅片 43的方式交替设置， 换言之， 一个第二翅片 42后面接着一个第三翅片 43设置， 一个第三 翅片 43后面接着一个第二翅片 42设置。
在图 3和图 4所示的示例中， 第二翅片 42沿扁管 3的厚度方向 X延伸的中心线 L2与 第三翅片 43沿扁管 3的厚度方向 X延伸的中心线 L3在与扁管的长度方向 Y正交的平面 (例 如图 1和图 2中的水平面， 图 3中正交于观察者视线的平面） 内彼此重合。
更优选地， 第一翅片 41、 第二翅片 42和第三翅片 43沿扁管 3的厚度方向延伸的中心 线 L1, L2和 L3彼此重合。
当然， 本发明并不限于此， 例如， 第二翅片 42沿扁管 3的厚度方向 X延伸的的中心线 L2与第三翅片 43沿扁管 3的厚度方向 X延伸的中心线 L3在与扁管的长度方向 Y正交的平 面内彼此错开。 例如， 在正交于扁管 3的长度方向 Y的平面内， 第二翅片 42沿扁管 3的厚 度方向 X延伸的中心线 L2位于第一翅片 41沿扁管 3的厚度方向 X延伸的中心线 L1的下方， 第三翅片 43沿扁管 3的厚度方向 X延伸的中心线 L3位于第一翅片 41沿扁管 3的厚度方向 X延伸的中心线 L1的上方。
在图 3和图 4所示的实施例中， 第二翅片 42的宽度 HI等于第一翅片 41的宽度， 由此 第二翅片 42的宽度 HI和第一翅片 41的宽度均大于第三翅片 43的宽度 H2。
在本发明的一个可选的实施例中， 如图 5所示， 第二翅片 42和第三翅片 43以两个第 二翅片 42后面接两个第三翅片 43的方式交替设置， 换言之， 两个第二翅片 42相邻设置， 接着设置两个第三翅片 43， 再接着设置两个第二翅片 42.
如图 6所示， 可选地， 第二翅片 42和第三翅片 43以一个第二翅片 42后面接两个第三 翅片 43的方式设置。
可以理解的是， 第二翅片 42和第三翅片 43的交替设置方式并不限于上述方式， 例如， 可以以上述方式的组合方式设置。
在本发明的优选实施例中， 第二翅片 42的数量与第三翅片 43的数量之比在 1/3到 3 的范围内。
在本发明的优选实施例中， 扁管 3的宽度与翅片 4的宽度之比大于等于 2。 更具体地， 第二翅片 42的宽度与扁管 3的宽度之比大于 0. 75且小于等于 1， 且第三翅片 43的宽度与 扁管 3的宽度之比小于等于 0. 75。
更优选地， 第三翅片 43的宽度与第二翅片的宽度之比大于等于 0. 4且小于 1。
本申请的发明人意外地发现， 通过上述措施， 可以进一步提高换热性能， 减少翅片的 撕裂和积压变形。 尤其是， 在扁管 3的宽度与翅片 4的宽度之比大于等于 2时， 使第二翅 片 42和第三翅片 43沿 X方向交替设置， 可以进一步避免翅片撕裂和严重的挤压变形。
下面参考图 1-2和图 7-8描述根据本发明另一实施例的换热器。 图 7是根据本发明另 一个实施例的换热器的去除第一集流管的局部俯视示意图， 其中示出了一个折弯段。 图 8 是图 7所示的折弯段展开之后的示意图。
如图 7和 8所示， 根据本发明此实施例的换热器， 第二翅片 42沿扁管 3的厚度方向 X 延伸的中心线 L2与第三翅片 43沿扁管 3的厚度方向 X延伸的中心线 L3在与扁管 3的长度 方向 Y正交的平面内彼此错开。
根据本发明实施例的换热器，通过使第二翅片 42沿扁管 3的厚度方向 X延伸的中心线 与第三翅片 43沿扁管 3的厚度方向 X延伸的中心线在与扁管 3的长度方向 Y正交的平面内 彼此错开， 同时考虑了折弯段的翅片在折弯内侧的压縮量和折弯外侧的伸长量， 从而在换 热器折弯后， 翅片在折弯外侧不会被撕裂， 在折弯内侧的压縮变形小， 减少了换热性能损 失， 有效避免了热交换器在折弯时的翅片与扁管之间的撕裂和严重的挤压变形。
在图 7和 8所示的实施例中， 第一翅片 41， 第二翅片 42和第三翅片 43具有相同的宽 度。 如上所述， 第二翅片 42和第三翅片 43可以具有不同的宽度， 并且小于第一翅片 41的 宽度。
第二翅片 42和第三翅片 43的布置方式可以与参考图 3-6描述的方式相同， 这里不再 详细描述。
在本发明的此实施例中，优选地，第二翅片 42的数量与第三翅片 43的数量之比在 1/3 到 3的范围内， 扁管 3的宽度与翅片 4的宽度之比小于 2。
尤其是， 在扁管 3的宽度与翅片 4的宽度之比小于 2时， 使第二翅片 42沿扁管 3的厚 度方向 X延伸的中心线与第三翅片 43沿扁管 3的厚度方向 X延伸的中心线在与扁管 3的长 度方向 Y正交的平面内彼此错开， 可以进一步避免翅片的撕裂和严重的挤压变形， 进一步 提高换热效率。
根据本发明实施例的换热器， 在弯后， 翅片在折弯外侧不会被撕裂， 在折弯内侧的压 縮变形小， 减少了换热性能损失， 有效避免了热交换器在折弯时的翅片与扁管之间的撕裂 和挤压变形。 而且， 整个换热器的扁管直接均连接有翅片， 提高了换热效果， 且没有风量 损失和风阻增大， 提高了性能。 扁管之间均连接有翅片， 大大降低了扁管腐蚀的几率。 在本发明的描述中，需要理解的是，术语"中心"、 "纵向"、 "横向"、 "长度"、 "宽度"、 "厚度"、 "上"、 "下"、 "前"、 "后"、 "左"、 "右"、 "竖直"、 "水平"、 "顶"、 "底 " "内"、 "外"、 "顺时针"、 "逆时针"、 "轴向"、 "径向"、 "周向"等指示的方位或位置关系为基于 附图所示的方位或位置关系， 仅是为了便于描述本发明和简化描述， 而不是指示或暗示所 指的装置或元件必须具有特定的方位、 以特定的方位构造和操作， 因此不能理解为对本发 明的限制。
此外， 术语 "第一"、 "第二"仅用于描述目的， 而不能理解为指示或暗示相对重要性 或者隐含指明所指示的技术特征的数量。 由此， 限定有 "第一"、 "第二" 的特征可以明示 或者隐含地包括一个或者更多个该特征。在本发明的描述中， "多个"的含义是两个或两个 以上， 除非另有明确具体的限定。
在本发明中， 除非另有明确的规定和限定， 术语 "安装"、 "相连"、 "连接"、 "固定" 等术语应做广义理解， 例如， 可以是固定连接， 也可以是可拆卸连接， 或成一体； 可以是 机械连接， 也可以是电连接； 可以是直接相连， 也可以通过中间媒介间接相连， 可以是两 个元件内部的连通或两个元件的相互作用关系。 对于本领域的普通技术人员而言， 可以根 据具体情况理解上述术语在本发明中的具体含义。
在本发明中， 除非另有明确的规定和限定， 第一特征在第二特征 "上" 或 "下"可 以是第一和第二特征直接接触， 或第一和第二特征通过中间媒介间接接触。 而且， 第 一特征在第二特征 "之上" 、 "上方" 和 "上面" 可是第一特征在第二特征正上方或 斜上方， 或仅仅表示第一特征水平高度高于第二特征。 第一特征在第二特征 "之下" 、 "下方" 和 "下面" 可以是第一特征在第二特征正下方或斜下方， 或仅仅表示第一特 征水平高度小于第二特征。
在本说明书的描述中， 参考术语 "一个实施例"、 "一些实施例"、 "示例"、 "具体示 例"、 或 "一些示例"等的描述意指结合该实施例或示例描述的具体特征、 结构、 材料或者 特点包含于本发明的至少一个实施例或示例中。 在本说明书中， 对上述术语的示意性表述 不必须针对的是相同的实施例或示例。 而且， 描述的具体特征、 结构、 材料或者特点可以 在任一个或多个实施例或示例中以合适的方式结合。 此外， 本领域的技术人员可以将本说 明书中描述的不同实施例或示例进行结合和组合。
尽管上面已经示出和描述了本发明的实施例， 可以理解的是， 上述实施例是示例性的， 不能理解为对本发明的限制， 本领域的普通技术人员在本发明的范围内可以对上述实施例 进行变化、 修改、 替换和变型。

Claims

权利要求书
1、 一种换热器， 其特征在于， 包括：
第一集流管和第二集流管；
多个扁管， 所述扁管的两端分别与所述第一集流管和第二集流管相连， 多个所述扁管 沿所述第一集流管和第二集流管的轴向彼此间隔布置；
翅片， 所述翅片设在相邻的扁管之间，
其中所述换热器具有折弯段和与折弯段邻接的直线段， 所述直线段内的翅片为第一翅 片， 所述折弯段内的翅片分为第二翅片和第三翅片， 所述第二翅片的宽度大于所述第三翅 片的宽度， 且所述第二翅片和所述第三翅片沿所述轴向方向交替设置。
2、 根据权利要求 1所述换热器， 其特征在于， 所述第二翅片和所述第三翅片以一个第 二翅片接一个第三翅片的方式、 两个第二翅片接一个第三翅片的方式、 一个第二翅片接两 个第三翅片的方式、 两个第二翅片接两个第三翅片的方式中的至少一个方式交替设置。
3、 根据权利要求 1或 2所述换热器， 其特征在于， 所述第二翅片的数量与所述第三翅 片的数量之比在 1/3到 3的范围内。
4、 根据权利要求 1-3中任一项所述换热器， 其特征在于， 所述第二翅片的宽度等于所 述第一翅片的宽度。
5、 根据权利要求 1-4中任一项所述换热器， 其特征在于， 所述第一至第三翅片的沿所 述扁管的厚度方向延伸的中心线在与所述扁管的长度方向正交的平面内彼此重合。
6、 根据权利要求 1-5中任一项所述换热器， 其特征在于， 所述扁管的宽度与所述翅片 的宽度之比小于等于 2。
7、 根据权利要求 6所述换热器， 其特征在于， 所述第二翅片的宽度与所述扁管的宽度 之比大于 0. 75且小于等于 1，且所述第三翅片的宽度与所述扁管的宽度之比小于等于 0. 75。
8、 根据权利要求 7所述换热器， 其特征在于， 所述第三翅片的宽度与所述第二翅片的 宽度之比大于等于 0. 4且小于 1。
9、 根据权利要求 1-4中任一项所述换热器， 其特征在于， 所述第二翅片沿所述扁管的 厚度方向延伸的中心线与所述第三翅片沿所述扁管的厚度方向延伸的中心线在与所述扁管 的长度方向正交的平面内彼此错开。
10、 一种换热器， 其特征在于， 包括：
第一集流管和第二集流管；
多个扁管， 所述扁管的两端分别与所述第一集流管和第二集流管相连， 多个所述扁管 沿所述第一集流管和第二集流管的轴向彼此间隔布置；
翅片， 所述翅片设在相邻的扁管之间，
其中所述换热器具有折弯段和与折弯段邻接的直线段， 所述直线段内的翅片为第一翅 片， 所述折弯段内的翅片分为第二翅片和第三翅片， 所述第二翅片沿所述扁管的厚度方向 延伸的中心线与所述第三翅片沿所述扁管的厚度方向延伸的中心线在与所述扁管的长度方 向正交的平面内彼此错开。
11、 根据权利要求 10所述换热器， 其特征在于， 所述第二翅片和所述第三翅片以一个 第二翅片接一个第三翅片的方式、 两个第二翅片接一个第三翅片的方式、 一个第二翅片接 两个第三翅片的方式、 两个第二翅片接两个第三翅片的方式中的至少一个方式交替设置。
12、 根据权利要求 10或 11所述换热器， 其特征在于， 所述第二翅片和所述第三翅片 的宽度彼此不同。
13、 根据权利要求 10-12 中任一项所述换热器， 其特征在于， 所述第二翅片的数量与 所述第三翅片的数量之比在 1/3到 3的范围内。
14、 根据权利要求 10-13 中任一项所述换热器， 其特征在于， 所述扁管的宽度与所述 翅片的宽度之比大于 2。
PCT/CN2014/070732 2013-08-28 2014-01-16 换热器 WO2015027680A1 (zh)

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