US20240159468A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20240159468A1
US20240159468A1 US18/259,672 US202118259672A US2024159468A1 US 20240159468 A1 US20240159468 A1 US 20240159468A1 US 202118259672 A US202118259672 A US 202118259672A US 2024159468 A1 US2024159468 A1 US 2024159468A1
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United States
Prior art keywords
header
flat
flat tube
flat tubes
wall
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Pending
Application number
US18/259,672
Inventor
Jing Yuan
Leilei Wang
Feng Zhang
Xuemei Yang
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Danfoss AS
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Danfoss AS
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Assigned to DANFOSS A/S reassignment DANFOSS A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, Leilei, YANG, XUEMEI, YUAN, JING, ZHANG, FENG
Publication of US20240159468A1 publication Critical patent/US20240159468A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a 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
    • F28F2210/00—Heat exchange conduits
    • F28F2210/08—Assemblies of conduits having different features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/02—Reinforcing means for casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/04—Reinforcing means for conduits

Definitions

  • the embodiments of the present invention relate to a heat exchanger.
  • a heat exchanger comprises a header, flat tubes, and fins arranged alternately with the flat tubes.
  • the present invention provides a heat exchanger, comprising: a header, comprising a header wall having multiple through-holes; and multiple flat tubes, the multiple flat tubes being arranged in an axial direction of the header, and ends of the multiple flat tubes being respectively inserted into multiple through-holes of the header wall of the header and connected to the header wall,
  • the flat tube comprises multiple channels, and a spacing wall between adjacent channels; a dimension, in the direction of arrangement of the spacing wall, of at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is greater than a dimension, in the direction of arrangement of the spacing wall, of the spacing wall of the second flat tube.
  • the at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is a spacing wall located in the middle in a width direction of the first flat tube.
  • the dimensions, in the direction of arrangement of the spacing walls, of multiple spacing walls of at least one first flat tube in the at least one set of first flat tubes are the same.
  • At least one first flat tube in the at least one set of first flat tubes is a solid flat tube.
  • At least one first flat tube in the at least one set of first flat tubes comprises multiple secondary flat tubes, the multiple secondary flat tubes being spaced apart in a width direction of the flat tube; and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises multiple secondary through-holes, the multiple secondary through-holes being spaced apart in a circumferential direction of the header, and ends of the multiple secondary flat tubes being respectively inserted into the multiple secondary through-holes and connected to the header wall.
  • adjacent secondary flat tubes in the multiple secondary flat tubes of at least one first flat tube in the at least one set of first flat tubes are connected via a connecting part, the multiple secondary flat tubes being formed integrally with the connecting part.
  • At least one first flat tube in the at least one set of first flat tubes comprises two secondary flat tubes
  • the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises two secondary through-holes.
  • a dimension, in a circumferential direction of the header, of the through-hole in the header wall of the header corresponding to at least one first flat tube in the at least one set of first flat tubes is less than a dimension, in the circumferential direction of the header, of the through-hole in the header wall of the header corresponding to the second flat tube.
  • the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is inclined relative to the axial direction of the header.
  • the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes has a curved shape.
  • the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is parallel to the through-hole in the header wall of the header corresponding to the second flat tube.
  • each set of first flat tubes in the two sets of first flat tubes comprises one or more first flat tubes.
  • the heat exchanger By using the heat exchanger according to an embodiment of the present invention, it is possible for example to increase the bursting strength of the heat exchanger.
  • FIG. 1 is a schematic main view of a heat exchanger according to an embodiment of the present invention
  • FIG. 2 is a sectional view of a first flat tube of a heat exchanger according to an embodiment of the present invention
  • FIG. 3 is a sectional view of a second flat tube of a heat exchanger according to an embodiment of the present invention.
  • FIG. 4 is a sectional view of a first flat tube of a heat exchanger according to another embodiment of the present invention.
  • FIG. 5 is a sectional view of a first flat tube of a heat exchanger according to another embodiment of the present invention.
  • FIG. 6 is a schematic perspective view of a heat exchanger according to another embodiment of the present invention.
  • FIG. 7 is a side view of the header of the heat exchanger shown in FIG. 6 ;
  • FIG. 8 is a schematic perspective view of the first flat tube of the heat exchanger shown in FIG. 6 ;
  • FIG. 9 is a schematic perspective view of a first flat tube according to an embodiment of the present invention, used in the heat exchanger shown in FIG. 6 ;
  • FIG. 10 is a schematic perspective view of a heat exchanger according to another embodiment of the present invention.
  • FIG. 11 is a side view of the header of the heat exchanger shown in FIG. 10 ;
  • FIG. 12 is a side view of a header of a heat exchanger according to a further embodiment of the present invention.
  • FIG. 13 is a side view of a header of a heat exchanger according to a further embodiment of the present invention.
  • a heat exchanger 100 comprises: a header 1 , the header 1 comprising a header wall 10 , and the header wall 10 having multiple through-holes 11 ; and multiple flat tubes 2 .
  • the multiple flat tubes 2 are arranged in an axial direction of the header 1 , and ends 21 of the multiple flat tubes 2 are respectively inserted into the multiple through-holes 11 in the header wall 10 of the header 1 and connected to the header wall 10 .
  • the multiple flat tubes 2 comprise two sets of first flat tubes 2 A that are outermost in the axial direction of the header 1 , and a second flat tube 2 B between the two sets of first flat tubes 2 A.
  • the header 1 comprises two first parts 12 A corresponding to outermost flat tubes 2 in the axial direction of the header 1 , and a second part 12 B between the two first parts 12 A.
  • the tensile strength of at least one set of first flat tubes 2 A in the two sets of first flat tubes 2 A in the axial direction of the header 1 is greater than the tensile strength of the second flat tube 2 B in the axial direction of the header 1
  • the tensile strength of at least one first part 12 A of the two first parts 12 A of the header 1 in the axial direction of the header 1 is greater than the tensile strength of the second part 12 B of the header 1 in the axial direction of the header 1 .
  • the heat exchanger 100 may also comprise fins 3 arranged alternately with the flat tubes 2 .
  • the header 1 also comprises an end cap 13 .
  • Each set of first flat tubes 12 A in the two sets of first flat tubes 12 A comprises one or more first flat tubes 12 A.
  • the multiple first flat tubes 12 A are arranged sequentially or one after the other.
  • each set of first flat tubes 12 A comprises one first flat tube 12 A.
  • FIG. 2 is a sectional view of a first flat tube of a heat exchanger according to an embodiment of the present invention
  • FIG. 3 is a sectional view of a second flat tube of a heat exchanger according to an embodiment of the present invention.
  • the flat tube 2 comprises multiple channels 20 , and spacing walls 22 between adjacent channels 20 ; and a dimension, in the direction of arrangement of the spacing walls 22 , of at least one spacing wall 22 of at least one first flat tube 2 A in at least one set of first flat tubes 2 A is greater than a dimension, in the direction of arrangement of the spacing walls 22 , of the spacing wall 22 of the second flat tube 2 B.
  • the dimension, in the direction of arrangement of the spacing walls 22 , of at least one spacing wall 22 of the first flat tube 2 A is greater than the dimension, in the direction of arrangement of the spacing walls 22 , of the spacing wall 22 of the second flat tube 2 B.
  • the direction of arrangement of the spacing walls 22 is also a width direction of the flat tubes 2 .
  • the dimensions, in the direction of arrangement of the spacing walls 22 , of multiple spacing walls 22 of at least one first flat tube 2 A in at least one set of first flat tubes 2 A may be the same or different; for example, the dimensions, in the direction of arrangement of the spacing walls 22 , of multiple spacing walls 22 of the first flat tube 2 A may be the same or different.
  • the at least one spacing wall 22 of at least one first flat tube 2 A in at least one set of first flat tubes 2 A is a spacing wall 22 located in the middle in the width direction of the first flat tube 2 A.
  • the at least one spacing wall 22 of the first flat tube 2 A is a spacing wall 22 located in the middle in the width direction of the first flat tube 2 A.
  • At least one first flat tube 2 A in at least one set of first flat tubes 2 A is a solid flat tube 2 ; for example, the first flat tube 2 A is a solid flat tube 2 , i.e. has no channel 20 .
  • At least one first flat tube 2 A in at least one set of first flat tubes 2 A comprises multiple secondary flat tubes 2 S, the multiple secondary flat tubes 2 S being spaced apart in the width direction of the flat tube 2 ; and the through-hole 11 in the header wall 10 of the header 1 corresponding to the at least one first flat tube 2 A comprises multiple secondary through-holes 11 S, the multiple secondary through-holes 11 S being spaced apart in the circumferential direction of the header 1 , and ends of the multiple secondary flat tubes being respectively inserted into the multiple secondary through-holes and connected to the header wall.
  • the first flat tube 2 A comprises multiple secondary flat tubes 2 S, the multiple secondary flat tubes 2 S being spaced apart in the width direction of the flat tube 2 ; and the through-hole 11 in the header wall 10 of the header 1 corresponding to the first flat tube 2 A comprises multiple secondary through-holes 11 S, the multiple secondary through-holes 11 S being spaced apart in the circumferential direction of the header 1 .
  • adjacent secondary flat tubes 2 S in multiple secondary flat tubes 2 S of at least one first flat tube 2 A in at least one set of first flat tubes 2 A are connected via a connecting part 23 , the multiple secondary flat tubes 2 S being formed integrally with the connecting part 23 .
  • first flat tube 2 A in at least one set of first flat tubes 2 A comprises two secondary flat tubes 2 S
  • the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2 A comprises two secondary through-holes 11 S
  • the first flat tube 2 A comprises two secondary flat tubes 2 S
  • the through-hole 11 in the header wall 10 of the header 1 corresponding to the first flat tube 2 A comprises two secondary through-holes 11 S.
  • a dimension, in the circumferential direction of the header 1 , of the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2 A in at least one set of first flat tubes 2 A is less than a dimension, in the circumferential direction of the header 1 , of the through-hole 11 in the header wall 10 of the header 1 corresponding to the second flat tube 2 B.
  • the width of the first flat tube 2 A may be less than the width of the second flat tube 2 B; alternatively, only the width of the end of the first flat tube 2 A may be less than the width of the second flat tube 2 B and less than the width of another part of the first flat tube 2 A, the other part of the first flat tube 2 A having the same width as the second flat tube 2 B.
  • the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2 A in at least one set of first flat tubes 2 A is parallel to the through-hole 11 in the header wall 10 of the header 1 corresponding to the second flat tube 2 B.
  • the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2 A in at least one set of first flat tubes 2 A has a curved shape.
  • the first flat tube 2 A has a curved shape; or in a cross section perpendicular to the axial direction of the flat tube 2 , only the end of the first flat tube 2 A has a curved shape, while another part of the first flat tube 2 A has the same shape as the second flat tube 2 B.
  • the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2 A in at least one set of first flat tubes 2 A is inclined relative to the axial direction of the header 1 .
  • the first flat tube 2 A is inclined relative to the axial direction of the header 1 ; or only the end of the first flat tube 2 A is inclined relative to the axial direction of the header 1 , while another part of the first flat tube 2 A is parallel to the second flat tube 2 B.
  • At least one first flat tube 2 A in at least one set of first flat tubes 2 A of the two sets of first flat tubes 2 A may be one first flat tube 2 A or multiple first flat tubes 2 A.
  • the thickness of the spacing wall of the flat tube is increased, thereby enabling the flat tube to be restrained by pulling when the through-hole of the header is subjected to a force, and preventing the through-hole from increasing in size. Furthermore, by reducing the length of the through-hole of the header in the axial direction, deformation of the end of the header can be alleviated, preventing the through-hole from increasing in size. According to an embodiment of the present invention, the axial strength of the header end is enhanced, thereby increasing the final bursting pressure.
  • failure of the flat tubes at the two ends of the header in a strength bursting test can be mitigated, increasing the bursting pressure. At the same time, it is ensured that performance and cost remain virtually unchanged.

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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

A heat exchanger including: a collecting pipe that has a collecting pipe wall; and a plurality of flat pipes. The plurality of flat pipes include two groups of first flat pipes, which are positioned on the outermost side in an axial direction of the collecting pipe, and a second flat pipe, which is positioned between the two groups of first flat pipes; and the collecting pipe includes two first parts, which correspond to the two groups of first flat pipes in the axial direction of the collecting pipe, and a second part, which is positioned between the two first parts. The tensile strength of at least one group of first flat pipes from the two groups of first flat pipes in the axial direction of the collecting pipe is greater than the tensile strength of the second flat pipe in the axial direction of the collecting pipe and/or the tensile strength of at least one first part from the two first parts of the collecting pipe in the axial direction of the collecting pipe is greater than the tensile strength of the second part of the collecting pipe in the axial direction of the collecting pipe. By means of the heat exchanger in the present invention, the bursting strength of the heat exchanger can be improved.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application is a National Stage application of International Patent Application No. PCT/CN2021/140781, filed on Dec. 23, 2021, which claims priority to Chinese Patent Application No. 202023331639.8, filed on Dec. 30, 2020, each of which is hereby incorporated by reference in its entirety.
    • TECHNICAL FIELD
  • The embodiments of the present invention relate to a heat exchanger.
    • BACKGROUND
  • A heat exchanger comprises a header, flat tubes, and fins arranged alternately with the flat tubes. In a microchannel strength bursting test, due to axially outward expansion deformation of the ends of the header, excessively high stress in the flat tubes close to the ends of the header causes the flat tubes to rupture.
    • SUMMARY
  • It is an object of the present invention to provide a heat exchanger whereby, for example, the bursting strength of the heat exchanger can be increased.
  • The present invention provides a heat exchanger, comprising: a header, comprising a header wall having multiple through-holes; and multiple flat tubes, the multiple flat tubes being arranged in an axial direction of the header, and ends of the multiple flat tubes being respectively inserted into multiple through-holes of the header wall of the header and connected to the header wall,
      • wherein the multiple flat tubes comprise two sets of first flat tubes that are outermost in the axial direction of the header, and a second flat tube between the two sets of first flat tubes; the header comprises two first parts corresponding to outermost flat tubes in the axial direction of the header, and a second part between the two first parts, and wherein the tensile strength of at least one set of first flat tubes in the two sets of first flat tubes in the axial direction of the header is greater than the tensile strength of the second flat tube in the axial direction of the header, and/or the tensile strength of at least one first part of the two first parts of the header in the axial direction of the header is greater than the tensile strength of the second part of the header in the axial direction of the header.
  • According to an embodiment of the present invention, the flat tube comprises multiple channels, and a spacing wall between adjacent channels; a dimension, in the direction of arrangement of the spacing wall, of at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is greater than a dimension, in the direction of arrangement of the spacing wall, of the spacing wall of the second flat tube.
  • According to an embodiment of the present invention, the at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is a spacing wall located in the middle in a width direction of the first flat tube.
  • According to an embodiment of the present invention, the dimensions, in the direction of arrangement of the spacing walls, of multiple spacing walls of at least one first flat tube in the at least one set of first flat tubes are the same.
  • According to an embodiment of the present invention, at least one first flat tube in the at least one set of first flat tubes is a solid flat tube.
  • According to an embodiment of the present invention, at least one first flat tube in the at least one set of first flat tubes comprises multiple secondary flat tubes, the multiple secondary flat tubes being spaced apart in a width direction of the flat tube; and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises multiple secondary through-holes, the multiple secondary through-holes being spaced apart in a circumferential direction of the header, and ends of the multiple secondary flat tubes being respectively inserted into the multiple secondary through-holes and connected to the header wall.
  • According to an embodiment of the present invention, adjacent secondary flat tubes in the multiple secondary flat tubes of at least one first flat tube in the at least one set of first flat tubes are connected via a connecting part, the multiple secondary flat tubes being formed integrally with the connecting part.
  • According to an embodiment of the present invention, at least one first flat tube in the at least one set of first flat tubes comprises two secondary flat tubes, and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises two secondary through-holes.
  • According to an embodiment of the present invention, a dimension, in a circumferential direction of the header, of the through-hole in the header wall of the header corresponding to at least one first flat tube in the at least one set of first flat tubes is less than a dimension, in the circumferential direction of the header, of the through-hole in the header wall of the header corresponding to the second flat tube.
  • According to an embodiment of the present invention, when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is inclined relative to the axial direction of the header.
  • According to an embodiment of the present invention, when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes has a curved shape.
  • According to an embodiment of the present invention, when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is parallel to the through-hole in the header wall of the header corresponding to the second flat tube.
  • According to an embodiment of the present invention, each set of first flat tubes in the two sets of first flat tubes comprises one or more first flat tubes.
  • By using the heat exchanger according to an embodiment of the present invention, it is possible for example to increase the bursting strength of the heat exchanger.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic main view of a heat exchanger according to an embodiment of the present invention;
  • FIG. 2 is a sectional view of a first flat tube of a heat exchanger according to an embodiment of the present invention;
  • FIG. 3 is a sectional view of a second flat tube of a heat exchanger according to an embodiment of the present invention;
  • FIG. 4 is a sectional view of a first flat tube of a heat exchanger according to another embodiment of the present invention;
  • FIG. 5 is a sectional view of a first flat tube of a heat exchanger according to another embodiment of the present invention;
  • FIG. 6 is a schematic perspective view of a heat exchanger according to another embodiment of the present invention.
  • FIG. 7 is a side view of the header of the heat exchanger shown in FIG. 6 ;
  • FIG. 8 is a schematic perspective view of the first flat tube of the heat exchanger shown in FIG. 6 ;
  • FIG. 9 is a schematic perspective view of a first flat tube according to an embodiment of the present invention, used in the heat exchanger shown in FIG. 6 ;
  • FIG. 10 is a schematic perspective view of a heat exchanger according to another embodiment of the present invention;
  • FIG. 11 is a side view of the header of the heat exchanger shown in FIG. 10 ;
  • FIG. 12 is a side view of a header of a heat exchanger according to a further embodiment of the present invention; and
  • FIG. 13 is a side view of a header of a heat exchanger according to a further embodiment of the present invention.
    •  DETAILED DESCRIPTION
  • The present invention is explained further below in conjunction with the accompanying drawings and specific embodiments.
  • Referring to FIGS. 1 to 13 , a heat exchanger 100 according to an embodiment of the present invention comprises: a header 1, the header 1 comprising a header wall 10, and the header wall 10 having multiple through-holes 11; and multiple flat tubes 2. The multiple flat tubes 2 are arranged in an axial direction of the header 1, and ends 21 of the multiple flat tubes 2 are respectively inserted into the multiple through-holes 11 in the header wall 10 of the header 1 and connected to the header wall 10. The multiple flat tubes 2 comprise two sets of first flat tubes 2A that are outermost in the axial direction of the header 1, and a second flat tube 2B between the two sets of first flat tubes 2A. The header 1 comprises two first parts 12A corresponding to outermost flat tubes 2 in the axial direction of the header 1, and a second part 12B between the two first parts 12A. The tensile strength of at least one set of first flat tubes 2A in the two sets of first flat tubes 2A in the axial direction of the header 1 is greater than the tensile strength of the second flat tube 2B in the axial direction of the header 1, and/or the tensile strength of at least one first part 12A of the two first parts 12A of the header 1 in the axial direction of the header 1 is greater than the tensile strength of the second part 12B of the header 1 in the axial direction of the header 1. The heat exchanger 100 may also comprise fins 3 arranged alternately with the flat tubes 2. The header 1 also comprises an end cap 13. Each set of first flat tubes 12A in the two sets of first flat tubes 12A comprises one or more first flat tubes 12A. When each set of first flat tubes 12A comprises multiple first flat tubes 12A, the multiple first flat tubes 12A are arranged sequentially or one after the other. In the embodiment shown in the figures, each set of first flat tubes 12A comprises one first flat tube 12A. FIG. 2 is a sectional view of a first flat tube of a heat exchanger according to an embodiment of the present invention, and FIG. 3 is a sectional view of a second flat tube of a heat exchanger according to an embodiment of the present invention.
  • In an embodiment of the present invention, referring to FIG. 2 and FIG. 3 , the flat tube 2 comprises multiple channels 20, and spacing walls 22 between adjacent channels 20; and a dimension, in the direction of arrangement of the spacing walls 22, of at least one spacing wall 22 of at least one first flat tube 2A in at least one set of first flat tubes 2A is greater than a dimension, in the direction of arrangement of the spacing walls 22, of the spacing wall 22 of the second flat tube 2B. For example, the dimension, in the direction of arrangement of the spacing walls 22, of at least one spacing wall 22 of the first flat tube 2A is greater than the dimension, in the direction of arrangement of the spacing walls 22, of the spacing wall 22 of the second flat tube 2B. The direction of arrangement of the spacing walls 22 is also a width direction of the flat tubes 2. The dimensions, in the direction of arrangement of the spacing walls 22, of multiple spacing walls 22 of at least one first flat tube 2A in at least one set of first flat tubes 2A may be the same or different; for example, the dimensions, in the direction of arrangement of the spacing walls 22, of multiple spacing walls 22 of the first flat tube 2A may be the same or different. In an example of the present invention, referring to FIG. 4 , the at least one spacing wall 22 of at least one first flat tube 2A in at least one set of first flat tubes 2A is a spacing wall 22 located in the middle in the width direction of the first flat tube 2A. For example, the at least one spacing wall 22 of the first flat tube 2A is a spacing wall 22 located in the middle in the width direction of the first flat tube 2A.
  • In an embodiment of the present invention, referring to FIG. 5 , at least one first flat tube 2A in at least one set of first flat tubes 2A is a solid flat tube 2; for example, the first flat tube 2A is a solid flat tube 2, i.e. has no channel 20.
  • In an embodiment of the present invention, referring to FIG. 6 to FIG. 9 , at least one first flat tube 2A in at least one set of first flat tubes 2A comprises multiple secondary flat tubes 2S, the multiple secondary flat tubes 2S being spaced apart in the width direction of the flat tube 2; and the through-hole 11 in the header wall 10 of the header 1 corresponding to the at least one first flat tube 2A comprises multiple secondary through-holes 11S, the multiple secondary through-holes 11S being spaced apart in the circumferential direction of the header 1, and ends of the multiple secondary flat tubes being respectively inserted into the multiple secondary through-holes and connected to the header wall. For example, the first flat tube 2A comprises multiple secondary flat tubes 2S, the multiple secondary flat tubes 2S being spaced apart in the width direction of the flat tube 2; and the through-hole 11 in the header wall 10 of the header 1 corresponding to the first flat tube 2A comprises multiple secondary through-holes 11S, the multiple secondary through-holes 11S being spaced apart in the circumferential direction of the header 1. In an example of the present invention, referring to FIG. 9 , adjacent secondary flat tubes 2S in multiple secondary flat tubes 2S of at least one first flat tube 2A in at least one set of first flat tubes 2A are connected via a connecting part 23, the multiple secondary flat tubes 2S being formed integrally with the connecting part 23. For example, adjacent secondary flat tubes 2S of multiple secondary flat tubes 2S of the first flat tube 2A are connected via a connecting part 23, the multiple secondary flat tubes 2S being formed integrally with the connecting part 23, which may be a connecting piece. In the embodiment shown, at least one first flat tube 2A in at least one set of first flat tubes 2A comprises two secondary flat tubes 2S, and the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2A comprises two secondary through-holes 11S. For example, the first flat tube 2A comprises two secondary flat tubes 2S, and the through-hole 11 in the header wall 10 of the header 1 corresponding to the first flat tube 2A comprises two secondary through-holes 11S.
  • In an embodiment of the present invention, referring to FIGS. 10, 11, 12 and 13 , a dimension, in the circumferential direction of the header 1, of the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2A in at least one set of first flat tubes 2A is less than a dimension, in the circumferential direction of the header 1, of the through-hole 11 in the header wall 10 of the header 1 corresponding to the second flat tube 2B.
  • In an embodiment of the present invention, referring to FIG. 10 and FIG. 11 , the width of the first flat tube 2A may be less than the width of the second flat tube 2B; alternatively, only the width of the end of the first flat tube 2A may be less than the width of the second flat tube 2B and less than the width of another part of the first flat tube 2A, the other part of the first flat tube 2A having the same width as the second flat tube 2B.
  • In an embodiment of the present invention, referring to FIGS. 10 and 11 , when viewed in an axial direction of the flat tube 2, the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2A in at least one set of first flat tubes 2A is parallel to the through-hole 11 in the header wall 10 of the header 1 corresponding to the second flat tube 2B.
  • In embodiments of the present invention, referring to FIG. 12 , when viewed in the axial direction of the flat tube 2, the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2A in at least one set of first flat tubes 2A has a curved shape. For example, in a cross section perpendicular to the axial direction of the flat tube 2, the first flat tube 2A has a curved shape; or in a cross section perpendicular to the axial direction of the flat tube 2, only the end of the first flat tube 2A has a curved shape, while another part of the first flat tube 2A has the same shape as the second flat tube 2B.
  • In an embodiment of the present invention, referring to FIG. 13 , when viewed in the axial direction of the flat tube 2, the through-hole 11 in the header wall 10 of the header 1 corresponding to at least one first flat tube 2A in at least one set of first flat tubes 2A is inclined relative to the axial direction of the header 1. For example, in a cross section perpendicular to the axial direction of the flat tube 2, the first flat tube 2A is inclined relative to the axial direction of the header 1; or only the end of the first flat tube 2A is inclined relative to the axial direction of the header 1, while another part of the first flat tube 2A is parallel to the second flat tube 2B.
  • According to an embodiment of the present invention, at least one first flat tube 2A in at least one set of first flat tubes 2A of the two sets of first flat tubes 2A may be one first flat tube 2A or multiple first flat tubes 2A.
  • According to an embodiment of the present invention, the thickness of the spacing wall of the flat tube is increased, thereby enabling the flat tube to be restrained by pulling when the through-hole of the header is subjected to a force, and preventing the through-hole from increasing in size. Furthermore, by reducing the length of the through-hole of the header in the axial direction, deformation of the end of the header can be alleviated, preventing the through-hole from increasing in size. According to an embodiment of the present invention, the axial strength of the header end is enhanced, thereby increasing the final bursting pressure.
  • According to an embodiment of the present invention, failure of the flat tubes at the two ends of the header in a strength bursting test can be mitigated, increasing the bursting pressure. At the same time, it is ensured that performance and cost remain virtually unchanged.
  • Although the above embodiments have been described, certain features in the above embodiments can be combined to form new embodiments.

Claims (13)

1. A heat exchanger, comprising:
a header, comprising a header wall having multiple through-holes; and
multiple flat tubes, the multiple flat tubes being arranged in an axial direction of the header, and ends of the multiple flat tubes being respectively inserted into multiple through-holes of the header wall of the header and connected to the header wall,
wherein the multiple flat tubes comprise two sets of first flat tubes that are outermost in the axial direction of the header, and a second flat tube between the two sets of first flat tubes; the header comprises two first parts corresponding to outermost flat tubes in the axial direction of the header, and a second part between the two first parts, and
wherein the tensile strength of at least one set of first flat tubes in the two sets of first flat tubes in the axial direction of the header is greater than the tensile strength of the second flat tube in the axial direction of the header, and/or the tensile strength of at least one first part of the two first parts of the header in the axial direction of the header is greater than the tensile strength of the second part of the header in the axial direction of the header.
2. The heat exchanger as claimed in claim 1, wherein:
the flat tube comprises multiple channels, and a spacing wall between adjacent channels; a dimension, in the direction of arrangement of the spacing wall, of at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is greater than a dimension, in the direction of arrangement of the spacing wall, of the spacing wall of the second flat tube.
3. The heat exchanger as claimed in claim 2, wherein:
the at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is a spacing wall located in the middle in a width direction of the first flat tube.
4. The heat exchanger as claimed in claim 2, wherein:
the dimensions, in the direction of arrangement of the spacing walls, of multiple spacing walls of at least one first flat tube in the at least one set of first flat tubes are the same.
5. The heat exchanger as claimed in claim 1, wherein:
at least one first flat tube in the at least one set of first flat tubes is a solid flat tube.
6. The heat exchanger as claimed in claim 1, wherein:
at least one first flat tube in the at least one set of first flat tubes comprises multiple secondary flat tubes, the multiple secondary flat tubes being spaced apart in a width direction of the flat tube; and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises multiple secondary through-holes, the multiple secondary through-holes being spaced apart in a circumferential direction of the header, and ends of the multiple secondary flat tubes being respectively inserted into the multiple secondary through-holes and connected to the header wall.
7. The heat exchanger as claimed in claim 6, wherein:
adjacent secondary flat tubes in the multiple secondary flat tubes of at least one first flat tube in the at least one set of first flat tubes are connected via a connecting part, the multiple secondary flat tubes being formed integrally with the connecting part.
8. The heat exchanger as claimed in claim 6, wherein:
at least one first flat tube in the at least one set of first flat tubes comprises two secondary flat tubes, and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises two secondary through-holes.
9. The heat exchanger as claimed in claim 1, wherein:
a dimension, in a circumferential direction of the header, of the through-hole in the header wall of the header corresponding to at least one first flat tube in the at least one set of first flat tubes is less than a dimension, in the circumferential direction of the header, of the through-hole in the header wall of the header corresponding to the second flat tube.
10. The heat exchanger as claimed in claim 9, wherein:
when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is inclined relative to the axial direction of the header.
11. The heat exchanger as claimed in claim 9, wherein:
when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes has a curved shape.
12. The heat exchanger as claimed in claim 9, wherein:
when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is parallel to the through-hole in the header wall of the header corresponding to the second flat tube.
13. The heat exchanger as claimed in claim 1, wherein:
each set of first flat tubes in the two sets of first flat tubes comprises one or more first flat tubes.
US18/259,672 2020-12-30 2021-12-23 Heat exchanger Pending US20240159468A1 (en)

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CN202023331639.8U CN214582619U (en) 2020-12-30 2020-12-30 Heat exchanger
CN202023331639.8 2020-12-30
PCT/CN2021/140781 WO2022143393A1 (en) 2020-12-30 2021-12-23 Heat exchanger

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JP6905895B2 (en) * 2017-08-28 2021-07-21 マーレベーアサーマルシステムズジャパン株式会社 Capacitor
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