US20220282938A1 - Tank structure of heat exchanger - Google Patents
Tank structure of heat exchanger Download PDFInfo
- Publication number
- US20220282938A1 US20220282938A1 US17/641,147 US202017641147A US2022282938A1 US 20220282938 A1 US20220282938 A1 US 20220282938A1 US 202017641147 A US202017641147 A US 202017641147A US 2022282938 A1 US2022282938 A1 US 2022282938A1
- Authority
- US
- United States
- Prior art keywords
- tube insertion
- insertion holes
- header plate
- side portions
- portions
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
- 230000037431 insertion Effects 0.000 claims abstract description 175
- 238000003780 insertion Methods 0.000 claims abstract description 175
- 230000002265 prevention Effects 0.000 claims abstract description 26
- 239000011324 bead Substances 0.000 claims abstract description 24
- 238000005192 partition Methods 0.000 claims description 11
- 230000008646 thermal stress Effects 0.000 abstract description 7
- 230000035882 stress Effects 0.000 description 10
- 238000005219 brazing Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
-
- 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
- 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
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
- F28D1/0443—Combination of units extending one beside or one above the other
-
- 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
-
- 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
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
- F28F9/0224—Header boxes formed by sealing end plates into covers
- F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets
-
- 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
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
-
- 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
- F28F2225/08—Reinforcing means for header boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2270/00—Thermal insulation; Thermal decoupling
- F28F2270/02—Thermal insulation; Thermal decoupling by using blind conduits
Definitions
- the present invention relates to a tank structure of a heat exchanger that is most suitable for radiators for engine cooling water, oil coolers and other heat exchangers, and relates to one that improves heat durability thereof.
- a sealing surface 24 of a header plate 4 a is formed in flat, as shown in FIG. 8B , to narrow the width of the header plate.
- a deformation prevention beads 7 for supporting a tank main body 6 and preventing deformation of the tank main body 6 when the tank main body 6 is caulked, is provided.
- a high burring 22 is formed on long side portions of respective tube insertion holes, and a low burring is formed on short side portions.
- a brazing joining line in the short side portion is located on a tank outer side as compared with that in the long side portion.
- the stress concentration is prominent in a tube at the end-portion in the lengthwise direction of the header plate 4 a.
- the stress concentration is prominent in tubes near the partition portions.
- the present invention is directed to relax the concentration of thermal stress on a tube short side portion near a brazed portion between the tube and the header plate in a heat exchanger having a header plate with narrow width.
- the present invention according to a first aspect thereof is a tank structure of a heat exchanger, including:
- header plate 4 having a plurality of flat tube insertion holes 3 constituted of a pair of facing short side portions 1 and a pair of long side portions 2 linking the both short side portions 1 ;
- the short side portions 1 of the plurality of tube insertion holes 3 are located in a width direction of the header plate 4 , and their tube insertion holes 3 are arranged separately each other in a lengthwise direction of the header plate 4 , wherein
- respective tube insertion holes 3 except for end-portion tube insertion holes 8 at least located at end-portions in the lengthwise direction, are linked by deformation prevention beads 7 formed along the lengthwise direction of the header plate 4 ;
- the end-portion tube insertion holes 8 are not linked by the deformation prevention beads 7 .
- the present invention according to a second aspect thereof is the tank structure of a heat exchanger according to the first aspect, wherein:
- a low burring 9 having low height is formed on a hole brim of the short side portions 1 of the respective tube insertion holes 3 , while a high burring 10 higher than the low burring 9 is formed on the long side portions 2 of the respective tube insertion holes 3 except for at least the end-portion tube insertion holes 8 ;
- the low burring 9 is formed on the hole brim of the end-portion tube insertion holes 8 throughout the entire circumference thereof.
- the present invention according to the third aspect thereof is the tank structure of a heat exchanger according to the first aspect, wherein:
- the low burring 9 having low height is formed on a hole brim of the short side portions 1 of the respective tube insertion holes 3
- the high burring 10 higher than the low burring 9 is formed on the long side portions 2 of the respective tube insertion holes 3 except for at least the end-portion tube insertion holes 8 ;
- the low burring 9 is formed on hole brims of both end-portions of the long side portions 2 of at least the end-portion tube insertion holes 8
- the high burring 10 is formed on a hole brim of the long side portion 2 except for both end-portions thereof.
- the present invention is a tank structure of a heat exchanger, including:
- header plate 4 having a plurality of flat tube insertion holes 3 constituted of a pair of facing short side portions 1 and a pair of long side portions 2 linking the both short side portions 1 ;
- the short side portions 1 of the plurality of tube insertion holes 3 are located in a width direction of the header plate 4 , and their tube insertion holes 3 are arranged separately each other in a lengthwise direction of the header plate 4 ,
- the tank main body 6 harbors a partition portion 19 that divides the same into a plurality of zones in a lengthwise direction;
- a dummy tube insertion hole 11 is formed at the header plate 4 located near the partition portion 19 , and the end-portion tube insertion hole 8 with a plurality of tube insertion holes 3 in parallel on both sides of the dummy tube insertion hole 11 ;
- flat tubes 5 are inserted into respective tube insertion holes 3 , 8 , 11 ;
- respective tube insertion holes 3 except for the dummy tube insertion hole 11 and an end-portion tube insertion hole 8 located at least to the first from the dummy tube insertion hole 11 , are linked by the deformation prevention beads 7 formed along the lengthwise direction of the header plate 4 ;
- the present invention according to the fifth aspect thereof is the tank structure of a heat exchanger according to the fourth aspect, wherein:
- the low burring 9 is formed on short side portions 1 of the respective tube insertion holes 3 ;
- the high burring 10 is provided for the long side portions 2 of the respective tube insertion holes 3 except for the dummy tube insertion hole 11 and the end-portion tube insertion hole 8 located at least to the first from the dummy tube insertion hole 11 ;
- the low burring 9 is provided for the end-portion tube insertion hole 8 located at least to the first from the dummy tube insertion hole 11 throughout the entire circumference thereof.
- the invention according to the first aspect is an invention, wherein: respective tube insertion holes 3 , except for end-portion tube insertion holes 8 at least located at the end-portions of the header plate 4 in the lengthwise direction, are linked by the deformation prevention beads 7 formed along the lengthwise direction of the header plate 4 , and the deformation prevention beads 7 are not linked to the end-portion tube insertion hole 8 .
- the invention according to the second aspect is an invention, wherein: the low burring 9 having low height is formed on the hole brim of the short side portions 1 of respective tube insertion holes 3 , while the high burring 10 higher than the low burring 9 is formed on the long side portions 2 of respective tube insertion holes 3 except for the end-portion tube insertion hole 8 , and the low burring 9 is formed on the hole brim of the end-portion tube insertion holes 8 throughout the entire circumference of the hole brims.
- the brazing joining line of the end-portion tube insertion hole 8 with the flat tube 5 in the short side portion 1 becomes the same as that in the long side portion 2 . Therefore, stress concentration on the flat tube 5 in the short side portion 1 is relaxed.
- the invention according to the third aspect is an invention, wherein: the low burring 9 is formed on the hole brims of both end-portions of the long side portions 2 of the end-portion tube insertion holes 8 , while the high burring 10 is formed on the hole brim of long side portions 2 except for the both end-portions.
- the low burring 9 has been formed on hole brims at both end-portions of the long side portions 2 of the end-portion tube insertion hole 8 , and therefore stress concentration on the flat tube 5 at a joining portion with the short side portion 1 thereof is relaxed.
- the invention according to the fourth aspect is an invention, wherein: the tank main body 6 harbors a partition portion 19 that divides the same into a plurality of zones in a lengthwise direction; a dummy tube insertion hole 11 is formed at the header plate 4 located near the partition portion 19 , with the end-portion tube insertion hole 8 and a plurality of tube insertion holes 3 in parallel on both sides of the dummy tube insertion hole 11 ; respective tube insertion holes 3 , except for the dummy tube insertion hole 11 and an end-portion tube insertion hole 8 located at least to the first from the dummy tube insertion hole 11 , are linked by the deformation prevention beads 7 formed along the lengthwise direction of the header plate 4 ; and formed such that the deformation prevention beads 7 do not exist for the dummy tube insertion hole 11 and the end-portion tube insertion hole 8 located at least to the first from the dummy tube insertion hole 11 .
- the flexural rigidity of the header plate 4 corresponding to the part from which the deformation prevention beads 7 have been eliminated is reduced and the part deforms, to thereby absorb deformation due to thermal stress generated in the flat tube 5 inserted there.
- the invention according to the fifth aspect is an invention, wherein: the high burring 10 has been provided for long side portions 2 of respective tube insertion holes 3 , except for the dummy tube insertion hole 11 and the end-portion tube insertion hole 8 , and the low burring 9 has been formed to the end-portion tube insertion hole 8 throughout the entire circumference thereof.
- the brazing joining line of the end-portion tube insertion hole 8 with the flat tube 5 in the short side portion 1 becomes similar to that in the long side portion 2 . Therefore, stress concentration on the flat tube 5 in the short side portion 1 is relaxed.
- FIG. 1A illustrates an exploded perspective view of a tank structure of a heat exchanger in a first Example of the present invention
- FIG. 1B illustrates a main part perspective view of a header plate 4 thereof.
- FIG. 2A illustrates a plan view of the header plate 4 in the first Example
- FIG. 2B is a view seen along a B-B arrow in FIG. 2A
- FIG. 2C is a view seen along a C-C arrow in FIG. 2A
- FIG. 2D is a view seen along a D-D arrow in FIG. 2A
- FIG. 2E is a perspective view of an end-portion tube insertion hole 8 seen from the underside of FIG. 2D
- FIG. 2F is a view seen along an F-F arrow in FIG. 2A
- FIG. 2G is a perspective view seen from the underside of FIG. 2F .
- FIG. 3 illustrates a perspective view of a header plate 4 of a tank structure of a heat exchanger in a second Example of the present invention.
- FIG. 4A illustrates a plan view of the header plate 4 in the second Example
- FIG. 4B is a view seen along a B-B arrow in FIG. 4A
- FIG. 4C is a view seen along a C-C arrow in FIG. 4A
- FIG. 4D is a view seen along a D-D arrow in FIG. 4A
- FIG. 4E is a perspective view of an end-portion tube insertion hole 8 seen from the underside of FIG. 4D
- FIG. 4F is a view seen along an F-F arrow in FIG. 4A
- FIG. 4G is a perspective view seen from the underside of FIG. 4F .
- FIG. 5 illustrates a front view of a tank structure of a heat exchanger in a third Example of the present invention.
- FIG. 6A illustrates a main part plan view seen along a VI-VI arrow in FIG. 5
- FIG. 6B is a cross-sectional view seen along a B-B arrow in FIG. 6A
- FIG. 6C is a view seen along a C-C arrow in FIG. 6A
- FIG. 6D is a view seen along a D-D arrow in FIG. 6A .
- FIG. 7 illustrates a plan view of a tank structure of a heat exchanger in a fourth Example.
- FIG. 8A illustrates a main part plan view of a tank structure of a conventional heat exchanger
- FIG. 8B is a B-B cross-sectional view of FIG. 8A
- FIG. 8C is a main part perspective view of the tank structure.
- Heat exchangers in each of Examples explained below can be utilized as a radiator for cooling engine cooling water, a sub-radiator for cooling auxiliary machinery cooling water, or the like, as an example.
- FIG. 1 and FIG. 2 show the tank structure of the heat exchanger in the first Example of the present invention, in which FIG. 1A illustrates an exploded perspective view thereof, and FIG. 1B illustrates a perspective view of the header plate 4 for use in it.
- FIG. 2A illustrates a main part plan view of the header plate 4
- FIG. 2B to FIG. 2G illustrate cross-sectional views and perspective views, respectively, in FIG. 2A .
- This heat exchanger is a heat exchanger, in which a flat tube 5 and a corrugated fin 12 are arranged alternately in parallel to form a core, end-portions of the flat tubes 5 are inserted into tube insertion holes 3 and end-portion tube insertion holes 8 , respectively, provided for a bottom face 41 of the header plate 4 , and their insertion portions are brazed and fixed.
- a pair of side plates 15 (that on the left side is omitted) are arranged.
- Inner circumferences of respective tube insertion holes 3 and two end-portion tube insertion holes 8 are formed slightly larger than an outer circumference of the flat tube 5 to be inserted there.
- an expansion jig is inserted into the tip portion thereof to expand it due to plastic deformation, and each hole brim of the tube insertion holes 3 and end-portion tube insertion holes 8 is brought into close contact with the end-portion of the flat tube 5 .
- a tank main body 6 is constituted of a synthetic resin material in this Example, in which a small flange 6 a is formed on the outer circumference while tooth portions 6 b are integrally protruded at regular intervals on the inner circumference. Between each of the tooth portions 6 b , a tube escape portion 6 c is formed, and marginal portions on a long axis side of tip portions of respective flat tubes 5 intrude into the tube escape portion. Further, a seal ring 13 is arranged between the tooth portion 6 b and the inner surface of the tank main body 6 .
- the header plate 4 of this Example has been formed into a planar rectangle.
- a plurality of flat tube insertion holes 3 constituted of a pair of facing short side portions 1 and a pair of long side portions 2 linking both short side portions 1 have been drilled at regular intervals.
- two end-portion tube insertion holes 8 constituted of a pair of short side portions 1 and a pair of long side portions 2 have been drilled in the same way as the tube insertion hole 3 .
- respective tube insertion holes 3 are connected with a pair of parallel deformation prevention beads 7 protruding toward the inner face side of the tank main body 6 .
- the deformation prevention beads 7 are not linked to two end-portion tube insertion holes 8 .
- the surrounding of two end-portion tube insertion holes 8 is formed with the rigidity weaker than that in the surrounding of other tube insertion holes 3 .
- a burring protruding toward the inner face side of the tank main body 6 has been formed on hole brims of respective tube insertion holes 3 and end-portion tube insertion holes 8 .
- the high burring 10 having high height from the bottom face 41 of the header plate 4 to the tip of the burring has been formed on hole brims of a pair of long side portions 2 of respective tube insertion holes 3 .
- the low burring 9 having lower height than the high burring 10 has been formed on hole brims of a pair of short side portions 1 of respective tube insertion holes 3 .
- the low burring 9 having lower height than the high burring 10 has been formed on the hole brim of the end-portion tube insertion hole 8 , and the height of the low burring 9 is kept at an approximately the same throughout the entire circumference of the end-portion tube insertion hole 8 .
- the brazing joining line of the end-portion tube insertion hole 8 with the flat tube 5 in the short side portion 1 becomes similar to that in the long side portion 2 , and therefore stress concentration on the flat tube 5 in this short side portion 1 is relaxed.
- FIG. 3 and FIG. 4 show a second Example of the present invention.
- This Example is different from the first Example in the shape of a burring at the hole brim portions of two end-portion tube insertion holes 8 provided on both end-portions in the lengthwise direction of the header plate 4 .
- the low burring 9 has been formed on hole brims of both end-portions in the long side portion 2 of the end-portion tube insertion hole 8
- the high burring 10 has been formed on the hole brim of the long side portion 2 except for the both end-portions.
- FIG. 5 and FIG. 6 show a third Example of the present invention, in which FIG. 5 is a front view thereof, FIG. 6A is a view seen along a VI-VI arrow in FIG. 5 , FIG. 6B is a view seen along a B-B arrow in FIG. 6A , FIG. 6C is a view seen along a C-C arrow in FIG. 6A , and FIG. 6D is a view seen along a D-D arrow in FIG. 6A .
- upper and lower tanks constituted of a tank main body 6 and the header plate 4 have, via valley portions provided at a middle in the lengthwise direction, a first tank portion 17 and a second tank portion 18 on both sides thereof.
- a pair of partition portions 19 dividing the inside of the tank in the lengthwise direction into a plurality of zones are arranged facing each other, and end-portions thereof are joined with the inner surface of the header plate 4 via annular sealing rings 13 respectively.
- the dummy tube insertion hole 11 has been formed at a position corresponding to the vicinity of the partition portion 19 , and, while sandwiching the dummy tube insertion hole 11 , end-portion tube insertion holes 8 and tube insertion holes 3 are arranged one by one in a line.
- the end-portion of the flat tube 5 has been inserted into each of insertion holes 3 , 8 , 11 , and the flat tube 5 and each of insertion portions are brazed and fixed.
- a first flow path 20 and a second flow path 21 each constituted of an assembly of a plurality of the flat tubes 5 are arranged, and different heat media circulate through these flow paths.
- engine cooling water may be made to circulate through the first flow path 20
- auxiliary machinery cooling water may be made to circulate through the second flow path 21 .
- the dummy tube insertion hole 11 , and the end-portion tube insertion hole 8 located to the first from the dummy tube insertion hole 11 are formed so that a deformation prevention beads 7 do not exist, as shown in FIG. 6A .
- each tube insertion hole 3 the high burring 10 has been formed on the long side portion 2 thereof, and the low burring 9 (not shown) has been formed on the short side portion 1 . Moreover, on hole brim portions of the end-portion tube insertion holes 8 , the low burring 9 has been formed, respectively.
- the rim of the hole brim portion of the end-portion tube insertion hole 8 and the rim portion of the dummy tube insertion hole 11 are formed with the rigidity weaker than the rigidity of others, to thereby absorb stress generated in the flat tube 5 inserted into the dummy tube insertion hole 11 and the end-portion tube insertion hole 8 .
- the brazing joining line of the end-portion tube insertion hole 8 with the flat tube 5 in the short side portion 1 becomes similar to that in the long side portion 2 , and therefore stress concentration on the flat tube 5 in the short side portion 1 is relaxed.
- FIG. 7 is a plan view of a header plate 4 in a fourth Example of the present invention.
- This invention is different from the invention in third Example in that three end-portion tube insertion holes 8 have been formed, respectively, while neighboring both sides of the dummy tube insertion hole 11 .
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
In a tank structure of a heat exchanger having a narrow width header plate, to reduce thermal stress generated in a tube on the outermost side of the header plate in a lengthwise direction. Insertion holes, except for end-portion tube insertion holes at least located at end portions of a header plate in the lengthwise direction, are linked with deformation prevention beads formed along the lengthwise direction of the header plate, and the end-portion tube insertion holes are not linked with the deformation prevention beads.
Description
- The present invention relates to a tank structure of a heat exchanger that is most suitable for radiators for engine cooling water, oil coolers and other heat exchangers, and relates to one that improves heat durability thereof.
- As a conventional tank of a heat exchanger, there has been found one in which the width of a header plate is narrowed for weight saving and space reduction.
- In the tank of a heat exchanger in
Patent Literature 1 below, asealing surface 24 of aheader plate 4 a is formed in flat, as shown inFIG. 8B , to narrow the width of the header plate. - Further, between tube insertion holes formed in the
header plate 4 a, adeformation prevention beads 7, for supporting a tankmain body 6 and preventing deformation of the tankmain body 6 when the tankmain body 6 is caulked, is provided. - PTL 1: WO 2017/069280 A1
- In the
header plate 4 a described in thePatent Literature 1, ahigh burring 22 is formed on long side portions of respective tube insertion holes, and a low burring is formed on short side portions. - Then, a brazing joining line in the short side portion is located on a tank outer side as compared with that in the long side portion.
- As the result of the examination of the present inventor, it has been found that concentration of thermal stress generated due to unevenness of temperature distribution in the heat exchanger on the tube short side portion became prominent in an instance where the brazing joining line in the short side portion was located on a tank outer side as compared with that in the long side portion as described above.
- Meanwhile, the stress concentration is prominent in a tube at the end-portion in the lengthwise direction of the
header plate 4 a. - Moreover, in an instance where a tank is divided into a plurality of zones by partition portions and fluids having different temperatures each other flow into respective zones, the stress concentration is prominent in tubes near the partition portions.
- Therefore, the present invention is directed to relax the concentration of thermal stress on a tube short side portion near a brazed portion between the tube and the header plate in a heat exchanger having a header plate with narrow width.
- The present invention according to a first aspect thereof is a tank structure of a heat exchanger, including:
- a
header plate 4 having a plurality of flattube insertion holes 3 constituted of a pair of facingshort side portions 1 and a pair oflong side portions 2 linking the bothshort side portions 1; - a plurality of
flat tubes 5 whose end-portions have been inserted into the respectivetube insertion holes 3, and the insertion portions have been brazed; - a tank
main body 6 to which a rim of theheader plate 4 is fixed by caulking, and - the
short side portions 1 of the plurality oftube insertion holes 3 are located in a width direction of theheader plate 4, and theirtube insertion holes 3 are arranged separately each other in a lengthwise direction of theheader plate 4, wherein - respective
tube insertion holes 3, except for end-portiontube insertion holes 8 at least located at end-portions in the lengthwise direction, are linked bydeformation prevention beads 7 formed along the lengthwise direction of theheader plate 4; and - the end-portion
tube insertion holes 8 are not linked by thedeformation prevention beads 7. - The present invention according to a second aspect thereof is the tank structure of a heat exchanger according to the first aspect, wherein:
- a
low burring 9 having low height is formed on a hole brim of theshort side portions 1 of the respectivetube insertion holes 3, while ahigh burring 10 higher than thelow burring 9 is formed on thelong side portions 2 of the respectivetube insertion holes 3 except for at least the end-portiontube insertion holes 8; and - the
low burring 9 is formed on the hole brim of the end-portiontube insertion holes 8 throughout the entire circumference thereof. - The present invention according to the third aspect thereof is the tank structure of a heat exchanger according to the first aspect, wherein:
- the
low burring 9 having low height is formed on a hole brim of theshort side portions 1 of the respectivetube insertion holes 3, and thehigh burring 10 higher than thelow burring 9 is formed on thelong side portions 2 of the respectivetube insertion holes 3 except for at least the end-portiontube insertion holes 8; and - the
low burring 9 is formed on hole brims of both end-portions of thelong side portions 2 of at least the end-portiontube insertion holes 8, and thehigh burring 10 is formed on a hole brim of thelong side portion 2 except for both end-portions thereof. - The present invention according to the fourth aspect thereof is a tank structure of a heat exchanger, including:
- a
header plate 4 having a plurality of flattube insertion holes 3 constituted of a pair of facingshort side portions 1 and a pair oflong side portions 2 linking the bothshort side portions 1; - a plurality of
flat tubes 5 whose end-portions have been inserted into the respectivetube insertion holes 3, and the insertion portions have been brazed; and - a tank
main body 6 to which a rim of theheader plate 4 is fixed by caulking, in which - the
short side portions 1 of the plurality oftube insertion holes 3 are located in a width direction of theheader plate 4, and theirtube insertion holes 3 are arranged separately each other in a lengthwise direction of theheader plate 4, - wherein:
- the tank
main body 6 harbors apartition portion 19 that divides the same into a plurality of zones in a lengthwise direction; - a dummy
tube insertion hole 11 is formed at theheader plate 4 located near thepartition portion 19, and the end-portiontube insertion hole 8 with a plurality oftube insertion holes 3 in parallel on both sides of the dummytube insertion hole 11; -
flat tubes 5 are inserted into respectivetube insertion holes - respective
tube insertion holes 3, except for the dummytube insertion hole 11 and an end-portiontube insertion hole 8 located at least to the first from the dummytube insertion hole 11, are linked by thedeformation prevention beads 7 formed along the lengthwise direction of theheader plate 4; and - formed so that the
deformation prevention beads 7 do not exist for the dummytube insertion hole 11 and the end-portiontube insertion hole 8 located at least to the first from the dummytube insertion hole 11. - The present invention according to the fifth aspect thereof is the tank structure of a heat exchanger according to the fourth aspect, wherein:
- the
low burring 9 is formed onshort side portions 1 of the respectivetube insertion holes 3; - the
high burring 10 is provided for thelong side portions 2 of the respectivetube insertion holes 3 except for the dummytube insertion hole 11 and the end-portiontube insertion hole 8 located at least to the first from the dummytube insertion hole 11; and - the
low burring 9 is provided for the end-portiontube insertion hole 8 located at least to the first from the dummytube insertion hole 11 throughout the entire circumference thereof. - The invention according to the first aspect is an invention, wherein: respective
tube insertion holes 3, except for end-portiontube insertion holes 8 at least located at the end-portions of theheader plate 4 in the lengthwise direction, are linked by thedeformation prevention beads 7 formed along the lengthwise direction of theheader plate 4, and thedeformation prevention beads 7 are not linked to the end-portiontube insertion hole 8. - As a result of eliminating the
deformation prevention beads 7 from the end-portiontube insertion hole 8 as described above, flexural rigidity of the part of theheader plate 4 is reduced, and deformation of the part absorbs effectively thermal deformation due to thermal stress generated larger in theflat tube 5 that should be inserted into the end-portion. Moreover, when the rim of theheader plate 4 is caulked and fixed to the tankmain body 6, the caulking load is supported withdeformation prevention beads 7 provided for othertube insertion holes 3. Therefore, the function of tank deformation prevention by thedeformation prevention beads 7 is ensured and, furthermore, thermal stress generated in theflat tube 5 inserted into the end-portiontube insertion hole 8 is reduced. - The invention according to the second aspect is an invention, wherein: the
low burring 9 having low height is formed on the hole brim of theshort side portions 1 of respectivetube insertion holes 3, while thehigh burring 10 higher than thelow burring 9 is formed on thelong side portions 2 of respectivetube insertion holes 3 except for the end-portiontube insertion hole 8, and thelow burring 9 is formed on the hole brim of the end-portiontube insertion holes 8 throughout the entire circumference of the hole brims. - Hereby, the brazing joining line of the end-portion
tube insertion hole 8 with theflat tube 5 in theshort side portion 1 becomes the same as that in thelong side portion 2. Therefore, stress concentration on theflat tube 5 in theshort side portion 1 is relaxed. - The invention according to the third aspect is an invention, wherein: the
low burring 9 is formed on the hole brims of both end-portions of thelong side portions 2 of the end-portiontube insertion holes 8, while thehigh burring 10 is formed on the hole brim oflong side portions 2 except for the both end-portions. - As a result of forming the
high burring 10 on thelong side portions 2, except for both end-portions thereof, of the end-portiontube insertion holes 8 in the same way as in othertube insertion holes 3 as described above, expansion workability for theflat tube 5 to be inserted there can be made almost the same as that forflat tubes 5 in other sites. - Meanwhile, into an opening end-portion of
flat tube 5 to be inserted into each ofinsertion holes flat tube 5 into close contact with each ofinsertion holes flat tube 5 and theheader plate 4 are brazed. - Moreover, the
low burring 9 has been formed on hole brims at both end-portions of thelong side portions 2 of the end-portiontube insertion hole 8, and therefore stress concentration on theflat tube 5 at a joining portion with theshort side portion 1 thereof is relaxed. - The invention according to the fourth aspect is an invention, wherein: the tank
main body 6 harbors apartition portion 19 that divides the same into a plurality of zones in a lengthwise direction; a dummytube insertion hole 11 is formed at theheader plate 4 located near thepartition portion 19, with the end-portiontube insertion hole 8 and a plurality oftube insertion holes 3 in parallel on both sides of the dummytube insertion hole 11; respectivetube insertion holes 3, except for the dummytube insertion hole 11 and an end-portiontube insertion hole 8 located at least to the first from the dummytube insertion hole 11, are linked by thedeformation prevention beads 7 formed along the lengthwise direction of theheader plate 4; and formed such that thedeformation prevention beads 7 do not exist for the dummytube insertion hole 11 and the end-portiontube insertion hole 8 located at least to the first from the dummytube insertion hole 11. - Hereby, the flexural rigidity of the
header plate 4 corresponding to the part from which thedeformation prevention beads 7 have been eliminated is reduced and the part deforms, to thereby absorb deformation due to thermal stress generated in theflat tube 5 inserted there. - Moreover, when the rim of the
header plate 4 is caulked and fixed to the tankmain body 6, the load to be added is supported withdeformation prevention beads 7 formed at othertube insertion holes 3. Therefore, the function of tank deformation prevention is ensured and, furthermore, thermal stress generated in theflat tube 5 inserted into the end-portiontube insertion hole 8 is reduced. - The invention according to the fifth aspect is an invention, wherein: the
high burring 10 has been provided forlong side portions 2 of respectivetube insertion holes 3, except for the dummytube insertion hole 11 and the end-portiontube insertion hole 8, and thelow burring 9 has been formed to the end-portiontube insertion hole 8 throughout the entire circumference thereof. - Hereby, the brazing joining line of the end-portion
tube insertion hole 8 with theflat tube 5 in theshort side portion 1 becomes similar to that in thelong side portion 2. Therefore, stress concentration on theflat tube 5 in theshort side portion 1 is relaxed. -
FIG. 1A illustrates an exploded perspective view of a tank structure of a heat exchanger in a first Example of the present invention, andFIG. 1B illustrates a main part perspective view of aheader plate 4 thereof. -
FIG. 2A illustrates a plan view of theheader plate 4 in the first Example,FIG. 2B is a view seen along a B-B arrow inFIG. 2A ,FIG. 2C is a view seen along a C-C arrow inFIG. 2A ,FIG. 2D is a view seen along a D-D arrow inFIG. 2A ,FIG. 2E is a perspective view of an end-portiontube insertion hole 8 seen from the underside ofFIG. 2D ,FIG. 2F is a view seen along an F-F arrow inFIG. 2A , andFIG. 2G is a perspective view seen from the underside ofFIG. 2F . -
FIG. 3 illustrates a perspective view of aheader plate 4 of a tank structure of a heat exchanger in a second Example of the present invention. -
FIG. 4A illustrates a plan view of theheader plate 4 in the second Example,FIG. 4B —is a view seen along a B-B arrow inFIG. 4A ,FIG. 4C is a view seen along a C-C arrow inFIG. 4A ,FIG. 4D is a view seen along a D-D arrow inFIG. 4A ,FIG. 4E is a perspective view of an end-portiontube insertion hole 8 seen from the underside ofFIG. 4D ,FIG. 4F is a view seen along an F-F arrow inFIG. 4A , andFIG. 4G is a perspective view seen from the underside ofFIG. 4F . -
FIG. 5 illustrates a front view of a tank structure of a heat exchanger in a third Example of the present invention. -
FIG. 6A illustrates a main part plan view seen along a VI-VI arrow inFIG. 5 ,FIG. 6B is a cross-sectional view seen along a B-B arrow inFIG. 6A ,FIG. 6C is a view seen along a C-C arrow inFIG. 6A , andFIG. 6D is a view seen along a D-D arrow inFIG. 6A . -
FIG. 7 illustrates a plan view of a tank structure of a heat exchanger in a fourth Example. -
FIG. 8A illustrates a main part plan view of a tank structure of a conventional heat exchanger,FIG. 8B is a B-B cross-sectional view ofFIG. 8A , andFIG. 8C is a main part perspective view of the tank structure. - Next, embodiments of the present invention will be explained on the basis of the drawings, with Examples.
- Heat exchangers in each of Examples explained below can be utilized as a radiator for cooling engine cooling water, a sub-radiator for cooling auxiliary machinery cooling water, or the like, as an example.
-
FIG. 1 andFIG. 2 show the tank structure of the heat exchanger in the first Example of the present invention, in whichFIG. 1A illustrates an exploded perspective view thereof, andFIG. 1B illustrates a perspective view of theheader plate 4 for use in it.FIG. 2A illustrates a main part plan view of theheader plate 4, andFIG. 2B toFIG. 2G illustrate cross-sectional views and perspective views, respectively, inFIG. 2A . - This heat exchanger is a heat exchanger, in which a
flat tube 5 and acorrugated fin 12 are arranged alternately in parallel to form a core, end-portions of theflat tubes 5 are inserted intotube insertion holes 3 and end-portion tube insertion holes 8, respectively, provided for abottom face 41 of theheader plate 4, and their insertion portions are brazed and fixed. - Meanwhile, on both sides in the width direction of the core, a pair of side plates 15 (that on the left side is omitted) are arranged.
- Inner circumferences of respective
tube insertion holes 3 and two end-portion tube insertion holes 8 are formed slightly larger than an outer circumference of theflat tube 5 to be inserted there. When theflat tube 5 is inserted there later, an expansion jig is inserted into the tip portion thereof to expand it due to plastic deformation, and each hole brim of thetube insertion holes 3 and end-portion tube insertion holes 8 is brought into close contact with the end-portion of theflat tube 5. - Subsequently, the
flat tube 5 and each oftube insertion holes 3 and end-portion tube insertion holes 8 are integrally brazed and fixed. - Next, a tank
main body 6 is constituted of a synthetic resin material in this Example, in which asmall flange 6 a is formed on the outer circumference whiletooth portions 6 b are integrally protruded at regular intervals on the inner circumference. Between each of thetooth portions 6 b, atube escape portion 6 c is formed, and marginal portions on a long axis side of tip portions of respectiveflat tubes 5 intrude into the tube escape portion. Further, aseal ring 13 is arranged between thetooth portion 6 b and the inner surface of the tankmain body 6. - Further, nail portions for
caulking 16 provided at regular intervals for theheader plate 4 are caulked to the outer circumference of thesmall flange 6 a of the tankmain body 6, to thereby form the tank structure of the heat exchanger. Meanwhile, inFIG. 1 , an underside tank structure is omitted, but the underside tank is formed in the same way. - The
header plate 4 of this Example has been formed into a planar rectangle. In thebottom face 41 of theheader plate 4, a plurality of flat tube insertion holes 3 constituted of a pair of facingshort side portions 1 and a pair oflong side portions 2 linking bothshort side portions 1 have been drilled at regular intervals. At both end-portions in the lengthwise direction of the header plate 4 (inFIG. 1 ,FIG. 2A , the left side is omitted), in this Example, two end-portion tube insertion holes 8 constituted of a pair ofshort side portions 1 and a pair oflong side portions 2 have been drilled in the same way as thetube insertion hole 3. - The inner circumferences of respective
tube insertion holes 3 and end-portion tube insertion holes 8 are identical. - As shown in
FIG. 1 andFIG. 2A ,FIG. 2F ,FIG. 2G , respective tube insertion holes 3 are connected with a pair of paralleldeformation prevention beads 7 protruding toward the inner face side of the tankmain body 6. However, in this Example, thedeformation prevention beads 7 are not linked to two end-portion tube insertion holes 8. - Hereby, the surrounding of two end-portion tube insertion holes 8 is formed with the rigidity weaker than that in the surrounding of other tube insertion holes 3.
- Moreover, in this Example, a burring protruding toward the inner face side of the tank
main body 6 has been formed on hole brims of respectivetube insertion holes 3 and end-portion tube insertion holes 8. - As shown in
FIG. 2B , the high burring 10 having high height from thebottom face 41 of theheader plate 4 to the tip of the burring has been formed on hole brims of a pair oflong side portions 2 of respective tube insertion holes 3. Then, as shown inFIG. 2C , thelow burring 9 having lower height than the high burring 10 has been formed on hole brims of a pair ofshort side portions 1 of respective tube insertion holes 3. - Further, the
low burring 9 and the high burring 10 are connected smoothly. - Moreover, as shown in
FIG. 2B andFIG. 2C , thelow burring 9 having lower height than the high burring 10 has been formed on the hole brim of the end-portiontube insertion hole 8, and the height of thelow burring 9 is kept at an approximately the same throughout the entire circumference of the end-portiontube insertion hole 8. - Hereby, the brazing joining line of the end-portion
tube insertion hole 8 with theflat tube 5 in theshort side portion 1 becomes similar to that in thelong side portion 2, and therefore stress concentration on theflat tube 5 in thisshort side portion 1 is relaxed. - Next,
FIG. 3 andFIG. 4 show a second Example of the present invention. This Example is different from the first Example in the shape of a burring at the hole brim portions of two end-portion tube insertion holes 8 provided on both end-portions in the lengthwise direction of theheader plate 4. - In this Example, as shown in
FIG. 3 andFIG. 4C , thelow burring 9 has been formed on hole brims of both end-portions in thelong side portion 2 of the end-portiontube insertion hole 8, and, as shown inFIG. 3 andFIG. 4B , the high burring 10 has been formed on the hole brim of thelong side portion 2 except for the both end-portions. - As a result of setting the same high burring 10 as that of other tube insertion holes 3 on the
long side portion 2 of the end-portiontube insertion hole 8 except for both end-portions thereof as described above, the expansion workability of theflat tube 5 to be inserted there can be made almost the same as that of otherflat tubes 5. - Moreover, on hole brims of both end-portions of the
long side portion 2 of the end-portiontube insertion hole 8, thelow burring 9 has been formed, and therefore stress concentration on theflat tube 5 at the joining portion with theshort side portion 1 thereof is relaxed. - Next,
FIG. 5 andFIG. 6 show a third Example of the present invention, in whichFIG. 5 is a front view thereof,FIG. 6A is a view seen along a VI-VI arrow inFIG. 5 ,FIG. 6B is a view seen along a B-B arrow inFIG. 6A ,FIG. 6C is a view seen along a C-C arrow inFIG. 6A , andFIG. 6D is a view seen along a D-D arrow inFIG. 6A . - In this tank structure of a heat exchanger, in
FIG. 5 , upper and lower tanks constituted of a tankmain body 6 and theheader plate 4 have, via valley portions provided at a middle in the lengthwise direction, afirst tank portion 17 and asecond tank portion 18 on both sides thereof. - In the inside of the tank
main body 6, as shown inFIG. 6B , a pair ofpartition portions 19 dividing the inside of the tank in the lengthwise direction into a plurality of zones are arranged facing each other, and end-portions thereof are joined with the inner surface of theheader plate 4 via annular sealing rings 13 respectively. As shown inFIG. 6A ,FIG. 6B , to thisheader plate 4, the dummytube insertion hole 11 has been formed at a position corresponding to the vicinity of thepartition portion 19, and, while sandwiching the dummytube insertion hole 11, end-portiontube insertion holes 8 and tube insertion holes 3 are arranged one by one in a line. Further, the end-portion of theflat tube 5 has been inserted into each ofinsertion holes flat tube 5 and each of insertion portions are brazed and fixed. - In this way, on both sides in the lengthwise direction of the dummy
tube insertion hole 11, afirst flow path 20 and asecond flow path 21 each constituted of an assembly of a plurality of theflat tubes 5 are arranged, and different heat media circulate through these flow paths. As an example, engine cooling water may be made to circulate through thefirst flow path 20, and auxiliary machinery cooling water may be made to circulate through thesecond flow path 21. - Here, the dummy
tube insertion hole 11, and the end-portiontube insertion hole 8 located to the first from the dummytube insertion hole 11 are formed so that adeformation prevention beads 7 do not exist, as shown inFIG. 6A . - Further, on the hole brim portion of each
tube insertion hole 3, the high burring 10 has been formed on thelong side portion 2 thereof, and the low burring 9 (not shown) has been formed on theshort side portion 1. Moreover, on hole brim portions of the end-portion tube insertion holes 8, thelow burring 9 has been formed, respectively. - As such, the rim of the hole brim portion of the end-portion
tube insertion hole 8 and the rim portion of the dummytube insertion hole 11 are formed with the rigidity weaker than the rigidity of others, to thereby absorb stress generated in theflat tube 5 inserted into the dummytube insertion hole 11 and the end-portiontube insertion hole 8. - Furthermore, the brazing joining line of the end-portion
tube insertion hole 8 with theflat tube 5 in theshort side portion 1 becomes similar to that in thelong side portion 2, and therefore stress concentration on theflat tube 5 in theshort side portion 1 is relaxed. - Next,
FIG. 7 is a plan view of aheader plate 4 in a fourth Example of the present invention. This invention is different from the invention in third Example in that three end-portiontube insertion holes 8 have been formed, respectively, while neighboring both sides of the dummytube insertion hole 11. - Thereby, stress concentration on the
flat tube 5 in theshort side portion 1 of the end-portiontube insertion hole 8 is even more relaxed. -
- 1: short side portion
- 2: long side portion
- 3: tube insertion hole
- 4: header plate
- 4 a: header plate
- 5: flat tube
- 6: tank main body
- 6 a: small flange
- 6 b: tooth portion
- 6 c: tube escape portion
- 7: deformation prevention bead
- 8: end-portion tube insertion hole
- 9: low burring
- 10: high burring
- 11: dummy tube insertion hole
- 12: corrugated fin
- 13: seal ring
- 14: tooth portion
- 15: side plate
- 16: nail portion for caulking
- 17: first tank portion
- 18: second tank portion
- 19: partition portion
- 20: first flow path
- 21: second flow path
- 22: burring
- 22 a: R portion
- 24: sealing surface
- 41: bottom face
Claims (5)
1. A tank structure of a heat exchanger, comprising:
a header plate having a plurality of flat tube insertion holes constituted of a pair of facing short side portions and a pair of long side portions linking the both short side portions;
a plurality of flat tubes whose end-portions have been inserted into the respective tube insertion holes, and the insertion portions have been brazed;
a tank main body to which a rim of the header plate is fixed by caulking, and
the short side portions of the plurality of tube insertion holes are located in a width direction of the header plate, and their tube insertion holes are arranged separately each other in a lengthwise direction of the header plate, wherein:
respective tube insertion holes, except for end-portion tube insertion holes at least located at end-portions in the lengthwise direction, are linked by deformation prevention beads formed along the lengthwise direction of the header plate; and
the end-portion tube insertion holes are not linked by the deformation prevention beads.
2. The tank structure of a heat exchanger according to claim 1 , wherein:
a low burring having low height is formed on a hole brim of the short side portions of the respective tube insertion holes, while a high burring higher than the low burring is formed on the long side portions of the respective tube insertion holes except for at least the end-portion tube insertion holes; and
the low burring is formed on the hole brim of the end-portion tube insertion holes throughout the entire circumference thereof.
3. The tank structure of a heat exchanger according to claim 1 , wherein:
the low burring having low height is formed on a hole brim of the short side portions of the respective tube insertion holes, and the high burring higher than the low burring is formed on the long side portions of the respective tube insertion holes except for at least the end-portion tube insertion holes; and
the low burring is formed on hole brims of both end-portions of the long side portions of at least the end-portion tube insertion holes, and the high burring is formed on a hole brim of the long side portion except for both end-portions thereof.
4. A tank structure of a heat exchanger, including:
a header plate having a plurality of flat tube insertion holes constituted of a pair of facing short side portions and a pair of long side portions linking the both short side portions;
a plurality of flat tubes whose end-portions have been inserted into the respective tube insertion holes, and the insertion portions have been brazed; and
a tank main body to which a rim of the header plate is fixed by caulking, in which
the short side portions of the plurality of tube insertion holes are located in a width direction of the header plate, and their tube insertion holes are arranged separately each other in a lengthwise direction of the header plate,
wherein:
the tank main body harbors a partition portion that divides the same into a plurality of zones in a lengthwise direction;
a dummy tube insertion hole is formed at the header plate located near the partition portion, and the end-portion tube insertion hole with a plurality of tube insertion holes in parallel on both sides of the dummy tube insertion hole;
flat tubes are inserted into respective tube insertion holes;
respective tube insertion holes, except for the dummy tube insertion hole and an end-portion tube insertion hole located at least to the first from the dummy tube insertion hole, are linked by the deformation prevention beads formed along the lengthwise direction of the header plate; and
formed so that the deformation prevention beads do not exist for the dummy tube insertion hole and the end-portion tube insertion hole located at least to the first from the dummy tube insertion hole.
5. The tank structure of a heat exchanger according to claim 4 , wherein:
the low burring is formed on short side portions of the respective tube insertion holes;
the high burring is provided for the long side portions of the respective tube insertion holes except for the dummy tube insertion hole and the end-portion tube insertion hole located at least to the first from the dummy tube insertion hole; and
the low burring is provided for the end-portion tube insertion hole located at least to the first from the dummy tube insertion hole throughout the entire circumference thereof.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019167526 | 2019-09-13 | ||
JP2019-167526 | 2019-09-13 | ||
PCT/JP2020/034023 WO2021049505A1 (en) | 2019-09-13 | 2020-09-01 | Tank structure of heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220282938A1 true US20220282938A1 (en) | 2022-09-08 |
Family
ID=74866172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US17/641,147 Abandoned US20220282938A1 (en) | 2019-09-13 | 2020-09-01 | Tank structure of heat exchanger |
Country Status (4)
Country | Link |
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US (1) | US20220282938A1 (en) |
JP (1) | JPWO2021049505A1 (en) |
CN (1) | CN114341580A (en) |
WO (1) | WO2021049505A1 (en) |
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JPS59134784U (en) * | 1983-02-26 | 1984-09-08 | カルソニックカンセイ株式会社 | Tank for heat exchanger |
WO2000022366A1 (en) * | 1998-10-09 | 2000-04-20 | S.C. Romradiatoare S.A. | High efficiency heat exchanger with oval tubes |
JP2000213889A (en) * | 1999-01-26 | 2000-08-02 | Toyo Radiator Co Ltd | Tube plate of heat exchanger |
JP5107603B2 (en) * | 2007-04-26 | 2012-12-26 | 株式会社ティラド | Heat exchanger |
JP5746906B2 (en) * | 2011-04-28 | 2015-07-08 | 昭和電工株式会社 | Heat exchanger |
JP6520681B2 (en) * | 2015-12-10 | 2019-05-29 | 株式会社デンソー | Heat exchanger |
CN110114160B (en) * | 2016-12-26 | 2020-12-29 | 株式会社T.Rad | Method for processing flat hole with flanging on metal plate |
JP6867912B2 (en) * | 2017-08-10 | 2021-05-12 | 株式会社ティラド | Heat exchanger manufacturing method and heat exchanger |
-
2020
- 2020-09-01 JP JP2021545556A patent/JPWO2021049505A1/ja active Pending
- 2020-09-01 US US17/641,147 patent/US20220282938A1/en not_active Abandoned
- 2020-09-01 WO PCT/JP2020/034023 patent/WO2021049505A1/en active Application Filing
- 2020-09-01 CN CN202080062023.9A patent/CN114341580A/en active Pending
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US20060144579A1 (en) * | 2005-01-06 | 2006-07-06 | Denso Corporation | Heat exchanger |
US20150168080A1 (en) * | 2012-07-18 | 2015-06-18 | Denso Corporation | Heat exchanger |
JP6439454B2 (en) * | 2015-01-09 | 2018-12-19 | 株式会社デンソー | Heat exchanger |
US20180195805A1 (en) * | 2015-07-17 | 2018-07-12 | Denso Corporation | Heat exchanger |
JP2017075741A (en) * | 2015-10-15 | 2017-04-20 | 株式会社デンソー | Heat exchanger |
US20180306527A1 (en) * | 2015-10-22 | 2018-10-25 | T.Rad Co., Ltd. | Heat exchanger and method for assembling same |
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US20190063852A1 (en) * | 2017-08-30 | 2019-02-28 | Mahle International Gmbh | Heat exchanger and header plate for heat exchanger |
Also Published As
Publication number | Publication date |
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CN114341580A (en) | 2022-04-12 |
JPWO2021049505A1 (en) | 2021-03-18 |
WO2021049505A1 (en) | 2021-03-18 |
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AS | Assignment |
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