EP3789721B1 - A header-tank assembly - Google Patents
A header-tank assembly Download PDFInfo
- Publication number
- EP3789721B1 EP3789721B1 EP19461579.5A EP19461579A EP3789721B1 EP 3789721 B1 EP3789721 B1 EP 3789721B1 EP 19461579 A EP19461579 A EP 19461579A EP 3789721 B1 EP3789721 B1 EP 3789721B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- header
- tank
- tabs
- tank assembly
- foot 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.)
- Active
Links
- 238000002788 crimping Methods 0.000 claims description 57
- 239000012530 fluid Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 19
- 238000009826 distribution Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 description 21
- 239000002826 coolant Substances 0.000 description 6
- 238000011179 visual inspection Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000003313 weakening effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000295 complement effect Effects 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
- F28F9/0219—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
Definitions
- the present invention relates to a header-tank assembly for a heat exchanger.
- a heat exchanger generally includes a pair of spaced apart headers connected to two distant and opposite end portions of a heat exchanger core that is received inside a housing. Specifically, each of the spaced apart headers is configured with slots for receiving end portions of heat exchange tubes that along with the fins configure the heat exchanger core. Further, the pair of spaced apart headers, hereinafter referred to as headers are also connected to the end portions of the housing either by welding or brazing or any other joining process.
- the heat exchanger further includes a pair of heat exchanger tanks, hereinafter referred to as tanks, wherein each tank is joined to the corresponding header for configuring a sealed connection between the headers and the corresponding tanks, thereby configuring a header-tank assembly.
- the headers are connected to the respective tanks by crimping.
- the tank receives first heat exchanging fluid, often pressurized heat exchanging fluid from a first inlet, the heat exchanging fluid traverses through the heat exchange tubes and is received in the tank.
- the tank delivers out the first heat exchange fluid through a first outlet.
- the tanks are connected to the headers by crimping.
- the tanks in conjunction with the corresponding headers facilitate distribution of first heat exchange fluid to and collection of first heat exchange fluid from the heat exchange core.
- the crimping between the headers and the respective tanks is used for configuring header tank assembly for different heat exchangers such as for example, Water charge Air-cooler, radiator, condenser and evaporator.
- the housing receives second heat exchange media, for example, coolant therein and around the heat exchange tubes through at least one second inlet.
- the second heat exchange media or coolant is delivered out of the housing through at least one second outlet after the coolant has extracted heat from the first heat exchange fluid flowing through the heat exchange tubes.
- the headers of the header-tank assembly are provided with tabs that fold along fold lines for facilitating crimping of the tabs of the headers over respective foot portions of the tanks with sealing elements disposed between the headers and the respective foot portions of the tanks.
- the crimping between the headers and the corresponding tanks is required to be secure in order to configure leak-proof connection between the headers and the corresponding tanks.
- the headers are formed of aluminum. In case the tabs of the headers are thick sectioned, comparative more crimping force is required for crimping the tabs over the respective foot portions of the tanks as compared to when the tabs are thin sectioned.
- the higher crimping forces may damage the tabs or the crimping tool used for crimping the tabs over the respective foot portions of the tank.
- the higher crimping forces may also damage the tanks, particularly, in case the tanks are of plastic material. Due to crimping of the tabs over the respective foot portions, cracks and defects may be formed over the tabs, however, these cracks and defects may go un-noticed and aggravate over time resulting in mechanical failures, thereby reducing reliability and service life of the heat exchanger. Examples of such heat exchangers are disclosed in US2002/134529 A or
- JP2000249491 A JP2000249491 A .
- US 2002/134529 A discloses a header-tank assembly according to the preamble of claim 1.
- a header-tank assembly with a header having a provision for weakening the tabs along fold lines to facilitate crimping of thick sectioned tabs of the header over the foot portion of the respective tank.
- a header-tank assembly with header that requires comparatively less force for crimping of the tabs of the header over foot portions of the respective tank, thereby reducing chances of damage to the tabs or the crimping tool used for crimping or damage to the tanks.
- header-tank assembly with header that not only prevents formation of cracks or defects resulting due to crimping of tabs of the header over foot portion of the respective tank but also ensures quick detection of the cracks or defects just by visual inspection, in case the cracks or defects are formed.
- An object of the present invention is to provide a header-tank assembly with a header that obviates drawbacks associated with conventional headers that do not have any provision for weakening tabs along fold lines to facilitate crimping of the headers on respective tanks and as such the tabs are prone to damage, cracks and defects due to being subjected to high crimping forces during crimping.
- Another object of the present invention is to provide a header-tank assembly with a header of such configuration that requires comparatively less force for crimping of tabs configured on the header over foot portions of respective tank.
- object of the present invention is to provide a header-tank assembly with a header of such configuration that substantially reduces forces required for crimping tabs configured on the headers over foot portion of respective tanks, thereby preventing damage to crimping tool used for crimping and extending service life of the crimping tool.
- Another object of the present invention is to provide a header tank assembly with header of such configuration that prevents damage to the tank, particular tank of plastic material.
- Still another object of the present invention is to provide a header-tank assembly with a header of such configuration that prevents formation of cracks or defects resulting due to crimping of tabs configured on the header over foot portion of the respective tanks.
- Yet another object of the present invention is to provide a header-tank assembly with a header of such configuration that facilitates quick and easy detection of cracks or defects formed on the header just by visual inspection, in case any cracks or defects are formed.
- some elements or parameters may be indexed, such as a first element and a second element.
- this indexation is only meant to differentiate and name elements which are similar but not identical. No idea of priority should be inferred from such indexation, as these terms may be switched without betraying the invention. Additionally, this indexation does not imply any order in mounting or use of the elements of the invention.
- a header-tank assembly is disclosed in accordance with an embodiment of the present invention.
- the header-tank assembly includes a tank, a header a sealing element.
- the tank includes foot portions configured on at least one pair of opposite sides thereof.
- the header includes tabs configured on at least one pair of opposite sides. The tabs are crimped along fold lines configured thereon to receive the respective foot portions of the tank and configure connection between the header and the tank.
- the sealing element is disposed between the foot portions of the tank and the header.
- a notch is configured on an outside wall of each tab, wherein the notch extends along the fold line to facilitate crimping of the tabs over the respective foot portions and is visible after crimping operation.
- At least one tab is configured on each side of at least one pair of opposite sides of the header.
- the tabs configured on each side of at least one pair of opposite sides of the header are spaced apart from each other.
- the tabs fold along the fold lines and the notches extending along top edges of the foot portions of the tank received in the respective header to define the crimped configuration of the tabs.
- the tabs in the crimped configuration thereof receives the respective foot portions of the tank such that a first portion and a second portion of the tabs connected along the notch abut against edges of the foot portions of the tank.
- each tab along the notch is reduced by 10-35 percent as compared to thickness of rest of the tab.
- a heat exchanger is disclosed in accordance with an embodiment of the present invention.
- the heat exchanger includes a pair of spaced apart header-tank assembly connected by a plurality of heat exchanger elements, wherein a first header-tank assembly facilitates distribution of heat exchange fluid to the heat exchanger elements, whereas a second header-tank assembly disposed opposite to and spaced away from the first header-tank assembly facilitates collection of heat exchange fluid from the heat exchanger elements.
- the at least one of the header-tank assembly of the pair of header-tank assembly includes a tank, a header and a sealing element.
- the tank includes foot portions configured on at least one pair of opposite sides thereof.
- the header includes tabs configured on at least one pair of opposite sides thereof.
- the tabs are crimped along fold lines configured thereon to receive respective foot portions of the tank and configure connection between the header and the tank.
- the sealing element is disposed between the foot portions of the tank and the header.
- a notch is configured on an outside wall of each tab, wherein the notch extends along the fold line to facilitate crimping of the tabs over the respective foot portions and is visible even after the crimping operation.
- the present invention relates to a header of a heat exchanger used in automobiles that is configured with tabs of such configuration that facilitate crimping of the tank over the header, without requiring much effort and without damaging the crimping tool and also reducing the chances of damage, cracks and defects caused to the header due to the header being subjected to high crimping forces during crimping.
- the header of the heat exchanger is of such configuration that even in case damage, cracks and defects are formed on the header, these are visible from outside and can be detected just by visual inspection.
- FIG. 1a illustrates a conventional heat exchanger 01.
- the heat exchanger 01 generally includes a pair of spaced apart headers 02a and 02b , simply referred to as headers 02a and 02b connected to two distant and opposite end portions of a heat exchanger core received inside a housing 06.
- each of the spaced apart headers 02a and 02b is configured with slots for receiving end portions of heat exchange tubes that configure the heat exchanger core along with the fins.
- the headers 02a and 02b are also connected to the end portions of the housing 06 either by welding or brazing or any other joining process.
- the heat exchanger 01 further includes a pair of heat exchanger tanks 04a and 04b , hereinafter referred to as tanks, wherein each tank 04a, 04b is joined to the corresponding header 02a, 02b for configuring a sealed connection between the headers 02a, 02b and the corresponding tanks 04a, 04b, thereby forming a header-tank assembly 09a, 09b.
- the headers 02a and 02b are connected to the respective tanks 04a and 04b by crimping.
- the tank 04a receives first heat exchanging fluid, often pressurized heat exchanging fluid from a first inlet 07a and the other tank 04b delivers out the first heat exchange fluid through a first outlet 07b.
- the tanks 04a and 04b in conjunction with the corresponding headers 02a and 02b facilitate distribution of first heat exchange fluid to and collection of first heat exchange fluid from the heat exchange core 03.
- the housing 06 receives second heat exchange media, particularly coolant therein and around the heat exchange tubes through at least one second inlet.
- the second heat exchange media or coolant is delivered out of the housing 06 through at least one second outlet after the coolant has extracted heat from the first heat exchange fluid flowing through the heat exchange tubes.
- the headers 02a, 02b of the header-tank assembly 09a, 09b are provided with tabs 03a, 03b respectively.
- the tabs 03a, 03b fold along the fold lines 08a, 08b for facilitating crimping of the headers 02a, 02b over respective foot portions 05a, 05b of the tanks 04a, 04b with sealing elements 11a , 11b disposed between the headers 02a, 02b and the respective foot portions 05a, 05b of the tanks 04a, 04b.
- FIG. 1b illustrates the header-tank assembly 09a, 09b of the heat exchanger 01, wherein the tabs 03a, 03b are depicted in un-crimped configuration, also is depicted an enlarged sectional view of the header-tank assembly 09a, 09b along sectional plane X with the tabs 03a, 03b in un-crimped configuration.
- FIG. 1c illustrates the header-tank assembly 09a, 09b of the heat exchanger 01, wherein the tabs 03a, 03b are depicted in crimped configuration, also is depicted an enlarged sectional view of the header-tank assembly 09a, 09b along sectional plane X with the tabs 03a, 03b in crimped configuration.
- the crimping between the headers 02a, 02b and the corresponding tanks 04a, 04b is required to be secure in order to configure leak-proof connection between the headers 02a, 02b and the corresponding tanks 04a, 04b.
- the sealing elements 11a , 11b provide sealing connection between the headers 02a, 02b and the respective tanks 04a, 04b.
- the headers 02a, 02b are formed of aluminum.
- the tabs 03a, 03b of the headers 02a, 02b are thick sectioned, comparative more crimping force is required for crimping the tabs 03a, 03b over the respective foot portions 05a, 05b of the tanks 04a, 04b.
- the higher crimping forces may damage the tabs 03a, 03b or the crimping tool used for crimping the tabs 03a, 03b configured on the headers 02a,02b over the respective foot portions 05a, 05b of the tanks 04a, 04b.
- the tabs 03a, 03b may be weakened along the fold lines 08a, 08b by providing notches along inside wall of the tabs 03a,03b as illustrated in FIG 1b .
- the tabs 03a, 03b with notches along inside wall thereof are comparatively more prone to cracks, defects and damages due to space restrictions. Also, if cracks or defects are formed along the notches due to crimping, these are not visible once the tabs 03a, 03b are crimped over the respective foot portions 05a, 05b of the tank 04a, 04b.
- FIG. 2a illustrates a heat exchanger 200 in accordance with an embodiment of the present invention.
- the heat exchanger 200 includes a pair of spaced apart header-tank assembly 100a and 100b connected by a plurality of heat exchanger elements 40a that forms a part of a heat exchanger core 40 along with the fin elements disposed between the heat exchanger elements 40a.
- a first header-tank assembly 100a of the pair of header-tank assembly 100a and 100b facilitates distribution of heat exchange fluid to the heat exchanger elements 40a, particularly, the heat exchanger tubes.
- a second header-tank assembly 100b of the pair of header-tank assembly 100 a and 100b disposed opposite to and spaced away from the first header-tank assembly 100a facilitates collection of heat exchange fluid from the heat exchanger elements 40a, particularly, the heat exchanger tubes.
- the header-tank assembly 100a is disclosed in accordance with an embodiment of the present invention.
- the first and the second header-tank assemblies 100a and 100b are identical in structure, every embodiment disclosed henceforth for the header-tank assembly 100a and the elements configuring the header-tank assembly 100a may also applicable for the header-tank assembly 100b and elements configuring the header-tank assembly 100b.
- the first header-tank assembly 100a is only elaborately described in the below description.
- the first header-tank assembly 100a includes a tank 10a, a header 20a and a sealing element 30a.
- the tank 10a includes foot portions 12a configured on at least one pair of opposite sides of the tank 10a.
- the header 20a includes tabs 22a configured on at least one pair of opposite sides thereof. More specifically, the tabs 22a are configured on the opposite sides of the header 20a that are complimentary to the opposite sides of the tank 10a on which the foot portions 12a are configured.
- the tabs 22a are crimped along fold lines 24a configured thereon to receive the respective foot portions 12a of the tank 10a and configure connection between the header 20a and the tank 10a.
- At least one tab 22a is configured on each side of at least one pair of opposite sides of the header 20.
- each side of the header 20a includes three tabs configured thereon as illustrated in FIG. 2b .
- the tabs 22a are spaced apart from each other by spacing 23a between the adjacent tabs 22a as illustrated in FIG. 2b and FIG. 2c .
- the present invention is not limited to any particular number, placement, spacing between the tabs 22a as far as the tabs 22a are capable of receiving the respective foot portions 12a of the tank 10a to configure connection between the header 20a and the tank 10a.
- the sealing element 30a is disposed between the foot portions 12a of the tank 10a and the header 20a and configures a sealing connection between the header 20a and the tank 10a.
- the sealing element 30a is in form of a continuous closed loop.
- the present invention is not limited to any particular number, placement and configuration of the sealing element 30a as far as the sealing element 30a configures sealing connection between the header 20a and the tank 10a.
- a notch 26a is configured on an outside wall of each of the tabs 22a configured on the header 20a, wherein the notch 26a extends along the fold lines 24a to facilitate crimping of the tabs 22a over the respective foot portions 12a of the tanks 10a, while still being visible even after the crimping operation.
- the notches 26a configured on the tabs 22a facilitate weakening the tabs 22a along fold lines to facilitate crimping of even thick sectioned tabs 22a of the header 20a over the foot portions 12a of the respective tank 10a along the fold lines 24a.
- the thickness of the tabs 22a along the notch 26a is reduced by 10-35 percent as compared to thickness of rest of the tabs 22a.
- such configuration and weakening of the tabs 22a along the fold lines 24a comparatively less force is required for crimping of the tabs 22a of the header 20a over the foot portions 12a of the respective tank 10a, thereby reducing chances of damage to the tabs 22a or the crimping tool used for crimping.
- such configuration of the notches 26a not only prevents formation of cracks or defects resulting due to crimping of the tabs 22a of the header 20a over the foot portion 12a of the respective tank 10a but also ensures quick detection of the cracks or defects just by visual inspection, in case the cracks or defects are formed as the cracks or defects are formed near the notches and at the exterior wall of the header 20a.
- the tabs 22a fold along the respective fold lines 24a and the notches 26a that are extending along top edges of the foot portions 12a of the tank 10a received in the respective header 20a to define the crimped configuration of the tabs 22a.
- the tabs 22a in the crimped configuration thereof as illustrated in FIG. 2c so receives the respective foot portions 12a of the tank 10a that a first portion 27a and a second portion 28a of the tabs 22a connected along the notch 26a abut against edges of the foot portions 12a of the tank 10a.
- the edges of the foot portions 12a of the tank 10a are orthogonal to each other, accordingly, the first portion 27a and the second portion 28a of the tabs 22a abutting against the orthogonal edges of the foot portions 12a of the tank are also orthogonal.
- the edges of the foot portions 12a of the tank 10a can be at any angle with respect to each other, accordingly, the first portion 27a and the second portion 28a of the tabs 22a abutting against the edges of the foot portions 12a of the tank 10a are complementary to the edges.
- the notch 26a extends along the length of each tab 22a and along the fold line 24a to facilitate crimping of the tabs 22a over the respective foot portions 12a.
- Similar header-tank assembly 100b also referred to as the second header-tank assembly 100b is configured at opposite end portion of the heat exchanger core 40, wherein the second tank 10b of the header-tank assembly 100b is crimped to the corresponding header 20b.
- the header-tank assembly 100b includes a tank 10b, a header 20b and a sealing element 30b.
- the header 20b includes tabs 22b separated by spacing 23b in case there are multiple tabs 22b on a single side of the header 20b .
- a notch 26b is configured on an outside wall of each of the tabs 22b, the notch 26b extends along the fold line 24b to facilitate crimping of the tabs 22b over the respective foot portions 12b while still being visible even after the crimping operation.
- the elements and function of the header-tank assembly 100b are not elaborately disclosed in the present document for the sake of brevity of the present document.
- heat exchanger includes a pair of spaced apart header-tank assembly connected by a plurality of heat exchanger elements, wherein the header-tank assembly includes a tank, a header and a sealing element.
- the tank includes foot portions configured on at least one pair of opposite sides thereof.
- the header includes tabs configured on at least one pair of opposite sides. The tabs are crimped along fold lines configured thereon to receive respective foot portions of the tank and configure connection between the header and the tank.
- the sealing element is disposed between the foot portions of the tank and the header.
- a notch is configured on an outside wall of each tab, wherein the notch extends along the fold line to facilitate crimping of the tabs over the respective foot portions and is visible after crimping operation.
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- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
- The present invention relates to a header-tank assembly for a heat exchanger.
- A heat exchanger generally includes a pair of spaced apart headers connected to two distant and opposite end portions of a heat exchanger core that is received inside a housing. Specifically, each of the spaced apart headers is configured with slots for receiving end portions of heat exchange tubes that along with the fins configure the heat exchanger core. Further, the pair of spaced apart headers, hereinafter referred to as headers are also connected to the end portions of the housing either by welding or brazing or any other joining process. The heat exchanger further includes a pair of heat exchanger tanks, hereinafter referred to as tanks, wherein each tank is joined to the corresponding header for configuring a sealed connection between the headers and the corresponding tanks, thereby configuring a header-tank assembly. Generally, the headers are connected to the respective tanks by crimping. The tank receives first heat exchanging fluid, often pressurized heat exchanging fluid from a first inlet, the heat exchanging fluid traverses through the heat exchange tubes and is received in the tank. The tank delivers out the first heat exchange fluid through a first outlet. The tanks are connected to the headers by crimping. The tanks in conjunction with the corresponding headers facilitate distribution of first heat exchange fluid to and collection of first heat exchange fluid from the heat exchange core. The crimping between the headers and the respective tanks is used for configuring header tank assembly for different heat exchangers such as for example, Water charge Air-cooler, radiator, condenser and evaporator. In case of Water charge Air-cooler, the housing receives second heat exchange media, for example, coolant therein and around the heat exchange tubes through at least one second inlet. The second heat exchange media or coolant is delivered out of the housing through at least one second outlet after the coolant has extracted heat from the first heat exchange fluid flowing through the heat exchange tubes.
- Generally, the headers of the header-tank assembly are provided with tabs that fold along fold lines for facilitating crimping of the tabs of the headers over respective foot portions of the tanks with sealing elements disposed between the headers and the respective foot portions of the tanks. The crimping between the headers and the corresponding tanks is required to be secure in order to configure leak-proof connection between the headers and the corresponding tanks. Generally, the headers are formed of aluminum. In case the tabs of the headers are thick sectioned, comparative more crimping force is required for crimping the tabs over the respective foot portions of the tanks as compared to when the tabs are thin sectioned. The higher crimping forces may damage the tabs or the crimping tool used for crimping the tabs over the respective foot portions of the tank. The higher crimping forces may also damage the tanks, particularly, in case the tanks are of plastic material. Due to crimping of the tabs over the respective foot portions, cracks and defects may be formed over the tabs, however, these cracks and defects may go un-noticed and aggravate over time resulting in mechanical failures, thereby reducing reliability and service life of the heat exchanger. Examples of such heat exchangers are disclosed in
US2002/134529 A or -
JP2000249491 A -
US 2002/134529 A discloses a header-tank assembly according to the preamble of claim 1. - Accordingly, there is a need for a header-tank assembly with a header having a provision for weakening the tabs along fold lines to facilitate crimping of thick sectioned tabs of the header over the foot portion of the respective tank. Further, there is a need for a header-tank assembly with header that requires comparatively less force for crimping of the tabs of the header over foot portions of the respective tank, thereby reducing chances of damage to the tabs or the crimping tool used for crimping or damage to the tanks. Furthermore, there is a need for header-tank assembly with header that not only prevents formation of cracks or defects resulting due to crimping of tabs of the header over foot portion of the respective tank but also ensures quick detection of the cracks or defects just by visual inspection, in case the cracks or defects are formed.
- An object of the present invention is to provide a header-tank assembly with a header that obviates drawbacks associated with conventional headers that do not have any provision for weakening tabs along fold lines to facilitate crimping of the headers on respective tanks and as such the tabs are prone to damage, cracks and defects due to being subjected to high crimping forces during crimping.
- Another object of the present invention is to provide a header-tank assembly with a header of such configuration that requires comparatively less force for crimping of tabs configured on the header over foot portions of respective tank.
- Further, object of the present invention is to provide a header-tank assembly with a header of such configuration that substantially reduces forces required for crimping tabs configured on the headers over foot portion of respective tanks, thereby preventing damage to crimping tool used for crimping and extending service life of the crimping tool.
- Another object of the present invention is to provide a header tank assembly with header of such configuration that prevents damage to the tank, particular tank of plastic material.
- Still another object of the present invention is to provide a header-tank assembly with a header of such configuration that prevents formation of cracks or defects resulting due to crimping of tabs configured on the header over foot portion of the respective tanks.
- Yet another object of the present invention is to provide a header-tank assembly with a header of such configuration that facilitates quick and easy detection of cracks or defects formed on the header just by visual inspection, in case any cracks or defects are formed.
- In the present description, some elements or parameters may be indexed, such as a first element and a second element. In this case, unless stated otherwise, this indexation is only meant to differentiate and name elements which are similar but not identical. No idea of priority should be inferred from such indexation, as these terms may be switched without betraying the invention. Additionally, this indexation does not imply any order in mounting or use of the elements of the invention.
- A header-tank assembly is disclosed in accordance with an embodiment of the present invention. The header-tank assembly includes a tank, a header a sealing element. The tank includes foot portions configured on at least one pair of opposite sides thereof. The header includes tabs configured on at least one pair of opposite sides. The tabs are crimped along fold lines configured thereon to receive the respective foot portions of the tank and configure connection between the header and the tank. The sealing element is disposed between the foot portions of the tank and the header. A notch is configured on an outside wall of each tab, wherein the notch extends along the fold line to facilitate crimping of the tabs over the respective foot portions and is visible after crimping operation.
- Generally, at least one tab is configured on each side of at least one pair of opposite sides of the header.
- Particularly, the tabs configured on each side of at least one pair of opposite sides of the header are spaced apart from each other.
- Specifically, the tabs fold along the fold lines and the notches extending along top edges of the foot portions of the tank received in the respective header to define the crimped configuration of the tabs.
- More specifically, the tabs in the crimped configuration thereof receives the respective foot portions of the tank such that a first portion and a second portion of the tabs connected along the notch abut against edges of the foot portions of the tank.
- According to the invention the thickness of each tab along the notch is reduced by 10-35 percent as compared to thickness of rest of the tab.
- A heat exchanger is disclosed in accordance with an embodiment of the present invention. The heat exchanger includes a pair of spaced apart header-tank assembly connected by a plurality of heat exchanger elements, wherein a first header-tank assembly facilitates distribution of heat exchange fluid to the heat exchanger elements, whereas a second header-tank assembly disposed opposite to and spaced away from the first header-tank assembly facilitates collection of heat exchange fluid from the heat exchanger elements. The at least one of the header-tank assembly of the pair of header-tank assembly includes a tank, a header and a sealing element. The tank includes foot portions configured on at least one pair of opposite sides thereof. The header includes tabs configured on at least one pair of opposite sides thereof. The tabs are crimped along fold lines configured thereon to receive respective foot portions of the tank and configure connection between the header and the tank. The sealing element is disposed between the foot portions of the tank and the header. A notch is configured on an outside wall of each tab, wherein the notch extends along the fold line to facilitate crimping of the tabs over the respective foot portions and is visible even after the crimping operation.
- Other characteristics, details and advantages can be inferred from the description hereunder. A more complete appreciation and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying figures, wherein:
-
FIG. 1a illustrates a heat exchanger in accordance with the prior art; -
FIG. 1b illustrates a header-tank assembly of the heat exchanger ofFIG. 1a , wherein tabs of a header of the header-tank assembly are depicted in un-crimped configuration, also, is depicted an enlarged sectional view of the header-tank assembly along sectional plane X; -
FIG. 1c illustrates a header-tank assembly of the heat exchanger ofFIG. 1a , wherein tabs of a header of the header-tank assembly are depicted in crimped configuration, also is depicted an enlarged sectional view of the header-tank assembly along sectional plane X; -
FIG. 2a illustrates a heat exchanger in accordance with the present invention; -
FIG. 2b illustrates a header-tank assembly of the heat exchanger ofFIG. 2a , wherein tabs of a header of the header-tank assembly are depicted in un-crimped configuration, also is depicted an enlarged sectional view of the header-tank assembly along sectional plane Y; -
FIG. 2c illustrates a header-tank assembly of the heat exchanger ofFIG. 2a , wherein tabs of a header of the header-tank assembly are depicted in crimped configuration, also is depicted an enlarged sectional view of the header-tank assembly along sectional plane Y; - It must be noted that the figures disclose the invention in a detailed enough way to be implemented, said figures helping to better define the invention if needs be. The invention should however not be limited to the embodiment disclosed in the description.
- The present invention relates to a header of a heat exchanger used in automobiles that is configured with tabs of such configuration that facilitate crimping of the tank over the header, without requiring much effort and without damaging the crimping tool and also reducing the chances of damage, cracks and defects caused to the header due to the header being subjected to high crimping forces during crimping. Further, the header of the heat exchanger is of such configuration that even in case damage, cracks and defects are formed on the header, these are visible from outside and can be detected just by visual inspection.
-
FIG. 1a illustrates aconventional heat exchanger 01. Theheat exchanger 01 generally includes a pair of spaced apartheaders headers housing 06. Specifically, each of the spaced apartheaders headers housing 06 either by welding or brazing or any other joining process. Theheat exchanger 01 further includes a pair ofheat exchanger tanks tank corresponding header headers corresponding tanks tank assembly headers respective tanks tank 04a receives first heat exchanging fluid, often pressurized heat exchanging fluid from afirst inlet 07a and theother tank 04b delivers out the first heat exchange fluid through afirst outlet 07b. Thetanks headers housing 06 receives second heat exchange media, particularly coolant therein and around the heat exchange tubes through at least one second inlet. The second heat exchange media or coolant is delivered out of thehousing 06 through at least one second outlet after the coolant has extracted heat from the first heat exchange fluid flowing through the heat exchange tubes. - Generally, the
headers tank assembly tabs tabs fold lines headers respective foot portions tanks elements headers respective foot portions tanks FIG. 1b illustrates the header-tank assembly heat exchanger 01, wherein thetabs tank assembly tabs FIG. 1c illustrates the header-tank assembly heat exchanger 01, wherein thetabs tank assembly tabs headers corresponding tanks headers corresponding tanks elements headers respective tanks headers tabs headers tabs respective foot portions tanks tabs tabs headers respective foot portions tanks - In order to facilitate easy crimping of the
tabs headers respective foot portions tanks tabs fold lines tabs FIG 1b . Thetabs tabs respective foot portions tank heat exchanger 01. Therefore, there is need of a heat exchanger withheader header heat exchanger 01 due to aggravation of the damage, cracks and defects because of these damages, cracks and defects remaining concealed and unnoticed. -
FIG. 2a illustrates aheat exchanger 200 in accordance with an embodiment of the present invention. Theheat exchanger 200 includes a pair of spaced apart header-tank assembly heat exchanger elements 40a that forms a part of aheat exchanger core 40 along with the fin elements disposed between theheat exchanger elements 40a. A first header-tank assembly 100a of the pair of header-tank assembly heat exchanger elements 40a, particularly, the heat exchanger tubes. A second header-tank assembly 100b of the pair of header-tank assembly tank assembly 100a facilitates collection of heat exchange fluid from theheat exchanger elements 40a, particularly, the heat exchanger tubes. - The header-
tank assembly 100a is disclosed in accordance with an embodiment of the present invention. As the first and the second header-tank assemblies tank assembly 100a and the elements configuring the header-tank assembly 100a may also applicable for the header-tank assembly 100b and elements configuring the header-tank assembly 100b. For sake of brevity of present document, the first header-tank assembly 100a is only elaborately described in the below description. - The first header-
tank assembly 100a includes atank 10a, aheader 20a and asealing element 30a. Thetank 10a includesfoot portions 12a configured on at least one pair of opposite sides of thetank 10a. Theheader 20a includestabs 22a configured on at least one pair of opposite sides thereof. More specifically, thetabs 22a are configured on the opposite sides of theheader 20a that are complimentary to the opposite sides of thetank 10a on which thefoot portions 12a are configured. Thetabs 22a are crimped alongfold lines 24a configured thereon to receive therespective foot portions 12a of thetank 10a and configure connection between theheader 20a and thetank 10a. In accordance with an embodiment of the present invention, at least onetab 22a is configured on each side of at least one pair of opposite sides of the header 20. In one example, each side of theheader 20a includes three tabs configured thereon as illustrated inFIG. 2b . In case there are more than onetab 22a on each side of the at least one pair of opposite sides of theheader 20a, then thetabs 22a are spaced apart from each other by spacing 23a between theadjacent tabs 22a as illustrated inFIG. 2b andFIG. 2c . However, the present invention is not limited to any particular number, placement, spacing between thetabs 22a as far as thetabs 22a are capable of receiving therespective foot portions 12a of thetank 10a to configure connection between theheader 20a and thetank 10a. The sealingelement 30a is disposed between thefoot portions 12a of thetank 10a and theheader 20a and configures a sealing connection between theheader 20a and thetank 10a. In accordance with an embodiment of the present invention, the sealingelement 30a is in form of a continuous closed loop. However, the present invention is not limited to any particular number, placement and configuration of the sealingelement 30a as far as the sealingelement 30a configures sealing connection between theheader 20a and thetank 10a. - A
notch 26a is configured on an outside wall of each of thetabs 22a configured on theheader 20a, wherein thenotch 26a extends along thefold lines 24a to facilitate crimping of thetabs 22a over therespective foot portions 12a of thetanks 10a, while still being visible even after the crimping operation. Specifically, thenotches 26a configured on thetabs 22a facilitate weakening thetabs 22a along fold lines to facilitate crimping of even thicksectioned tabs 22a of theheader 20a over thefoot portions 12a of therespective tank 10a along thefold lines 24a. According to the invention, the thickness of thetabs 22a along thenotch 26a is reduced by 10-35 percent as compared to thickness of rest of thetabs 22a. With such configuration and weakening of thetabs 22a along thefold lines 24a, comparatively less force is required for crimping of thetabs 22a of theheader 20a over thefoot portions 12a of therespective tank 10a, thereby reducing chances of damage to thetabs 22a or the crimping tool used for crimping. Further, such configuration of thenotches 26a not only prevents formation of cracks or defects resulting due to crimping of thetabs 22a of theheader 20a over thefoot portion 12a of therespective tank 10a but also ensures quick detection of the cracks or defects just by visual inspection, in case the cracks or defects are formed as the cracks or defects are formed near the notches and at the exterior wall of theheader 20a. Thetabs 22a fold along therespective fold lines 24a and thenotches 26a that are extending along top edges of thefoot portions 12a of thetank 10a received in therespective header 20a to define the crimped configuration of thetabs 22a. Thetabs 22a in the crimped configuration thereof as illustrated inFIG. 2c , so receives therespective foot portions 12a of thetank 10a that afirst portion 27a and asecond portion 28a of thetabs 22a connected along thenotch 26a abut against edges of thefoot portions 12a of thetank 10a. In accordance with an embodiment, the edges of thefoot portions 12a of thetank 10a are orthogonal to each other, accordingly, thefirst portion 27a and thesecond portion 28a of thetabs 22a abutting against the orthogonal edges of thefoot portions 12a of the tank are also orthogonal. In another embodiment, the edges of thefoot portions 12a of thetank 10a can be at any angle with respect to each other, accordingly, thefirst portion 27a and thesecond portion 28a of thetabs 22a abutting against the edges of thefoot portions 12a of thetank 10a are complementary to the edges. In accordance with an embodiment of the present invention, thenotch 26a extends along the length of eachtab 22a and along thefold line 24a to facilitate crimping of thetabs 22a over therespective foot portions 12a. - Similar header-
tank assembly 100b, also referred to as the second header-tank assembly 100b is configured at opposite end portion of theheat exchanger core 40, wherein thesecond tank 10b of the header-tank assembly 100b is crimped to thecorresponding header 20b. The header-tank assembly 100b includes atank 10b, aheader 20b and asealing element 30b. Theheader 20b includestabs 22b separated by spacing 23b in case there aremultiple tabs 22b on a single side of theheader 20b. Anotch 26b is configured on an outside wall of each of thetabs 22b, thenotch 26b extends along thefold line 24b to facilitate crimping of thetabs 22b over therespective foot portions 12b while still being visible even after the crimping operation. The elements and function of the header-tank assembly 100b are not elaborately disclosed in the present document for the sake of brevity of the present document. - Several modifications and improvement might be applied by the person skilled in the art to the heat exchanger and the header-tank assembly thereof as disclosed above and such modifications and improvements will still be considered within the scope and ambit of the present invention, as long as heat exchanger includes a pair of spaced apart header-tank assembly connected by a plurality of heat exchanger elements, wherein the header-tank assembly includes a tank, a header and a sealing element. The tank includes foot portions configured on at least one pair of opposite sides thereof. The header includes tabs configured on at least one pair of opposite sides. The tabs are crimped along fold lines configured thereon to receive respective foot portions of the tank and configure connection between the header and the tank. The sealing element is disposed between the foot portions of the tank and the header. A notch is configured on an outside wall of each tab, wherein the notch extends along the fold line to facilitate crimping of the tabs over the respective foot portions and is visible after crimping operation.
- In any case, the invention should not be limited to the embodiments specifically described in the description as other embodiments might exist provided they are with the scope of the appended claims.
Claims (6)
- A header-tank assembly (100a, 100b) comprising:- a tank (10a, 10b) comprising foot portions (12a, 12b) configured on at least one pair of opposite sides thereof;- a header (20a, 20b) comprising tabs (22a, 22b) configured on at least one pair of opposite sides thereof, the tabs (22a, 22b) adapted to be crimped along fold lines (24a, 24b) configured thereon to receive the respective foot portions (12a, 12b) of the tank (10a, 10b) and configure connection between the header (20a, 20b) and the tank (10a, 10b);- a sealing element (30a, 30b) disposed between the foot portions (12a, 12b) of the tank (10a, 10b) and the header (20a, 20b);- a notch (26a, 26b) is configured on an outside wall of each tab (22a, 22b), the notch (26a, 26b) extends along the fold line (24a, 24b) to facilitate crimping of the tabs (22a, 22b) over the respective foot portions (12a, 12b); characterized in that the thickness of each tab (22a, 22b) along the notch (26a, 26b) is reduced by 10-35 percent as compared to the rest of the tab (22a, 22b).
- The header-tank assembly (100a, 100b) as claimed in claim 1, wherein at least one tab (22a, 22b) is configured on each side of at least one pair of opposite sides of the header (20).
- The header-tank assembly (100a, 100b) as claimed in claim 1, wherein the tabs (22a, 22b) configured on each side of at least one pair of opposite sides of the header (20) are spaced apart from each other.
- The header-tank assembly (100a, 100b) as claimed in claim 1, wherein the tabs (22a, 22b) are adapted to fold along the respective fold lines (24a, 24b) and the notches (26a, 26b) extending along top edges of the foot portions (12a, 12b) of the tank (10a, 10b) received in the respective header (20a, 20b) to define the crimped configuration of the tabs (22a, 22b) of the headers (20a, 20b).
- The header-tank assembly (100a, 100b) as claimed in claim 4, wherein the tabs (22a, 22b) in the crimped configuration thereof are adapted to receive the respective foot portions (12a, 12b) of the tanks (10a, 10b) such that a first portion (27a, 27b) and a second portion (28a, 28b) of the tabs (22a, 22b) connected along the notch (26a, 26b) abut against edges of the foot portions (12a, 12b) of the tank (10a, 10b).
- A heat exchanger (200) comprising a pair of spaced apart header-tank assembly (100a) and (100b) connected by a plurality of heat exchanger elements (40a), wherein a first header-tank assembly (100a) is adapted to facilitate distribution of heat exchange fluid to the heat exchanger elements (40a), whereas a second header-tank assembly (100b) disposed opposite to and spaced away from the first header-tank assembly (100a) is adapted to facilitate collection of heat exchange fluid from the heat exchanger elements (40a), characterized in that at least one of the header-tank assembly of the pair of header-tank assembly (100a, 100b) is according to one of the previous claims.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19461579.5A EP3789721B1 (en) | 2019-09-09 | 2019-09-09 | A header-tank assembly |
US17/640,545 US20220325964A1 (en) | 2019-09-09 | 2020-09-08 | A header-tank assembly |
PCT/EP2020/075030 WO2021048097A1 (en) | 2019-09-09 | 2020-09-08 | A header-tank assembly |
CN202080059702.0A CN114270130A (en) | 2019-09-09 | 2020-09-08 | Header box assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19461579.5A EP3789721B1 (en) | 2019-09-09 | 2019-09-09 | A header-tank assembly |
Publications (2)
Publication Number | Publication Date |
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EP3789721A1 EP3789721A1 (en) | 2021-03-10 |
EP3789721B1 true EP3789721B1 (en) | 2022-01-05 |
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ID=67909358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19461579.5A Active EP3789721B1 (en) | 2019-09-09 | 2019-09-09 | A header-tank assembly |
Country Status (4)
Country | Link |
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US (1) | US20220325964A1 (en) |
EP (1) | EP3789721B1 (en) |
CN (1) | CN114270130A (en) |
WO (1) | WO2021048097A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5201368A (en) * | 1992-06-22 | 1993-04-13 | General Motors Corporation | Gasket for a tank and header assembly |
DE4243495C5 (en) * | 1992-12-22 | 2010-02-18 | Behr Gmbh & Co. Kg | Elastomeric seal for heat exchangers |
JP2000249491A (en) * | 1999-03-02 | 2000-09-14 | Sanden Corp | Tank for heat exchanger and manufacture thereof |
JP3675348B2 (en) * | 2001-03-23 | 2005-07-27 | 株式会社デンソー | Heat exchanger |
FR2822532B1 (en) * | 2001-03-26 | 2003-06-27 | Valeo Thermique Moteur Sa | HEAT EXCHANGER WITH LATERAL JOYS, ESPECIALLY FOR MOTOR VEHICLE |
JP2005326124A (en) * | 2004-05-17 | 2005-11-24 | Calsonic Kansei Corp | Tube plate structure of heat exchanger |
US7954543B2 (en) * | 2004-12-10 | 2011-06-07 | Valeo Sistemas Electricos | Heat exchanger header with deformations |
US20150233654A1 (en) * | 2014-02-14 | 2015-08-20 | Denso International America, Inc. | Tank for heat exchanger |
FR3026170A1 (en) * | 2014-09-24 | 2016-03-25 | Valeo Systemes Thermiques | COLLECTOR PLATE FOR HEAT EXCHANGER, COLLECTOR BOX AND HEAT EXCHANGER |
KR102475643B1 (en) * | 2015-02-16 | 2022-12-09 | 한온시스템 주식회사 | Header tank of heat exchanger and heat exchanger having the same |
US10215509B2 (en) * | 2016-06-21 | 2019-02-26 | Hanon Systems | Coined header for heat exchanger |
EP3396296B1 (en) * | 2017-04-28 | 2020-09-09 | VALEO AUTOSYSTEMY Sp. Z. o.o. | Heat exchanger assembly |
-
2019
- 2019-09-09 EP EP19461579.5A patent/EP3789721B1/en active Active
-
2020
- 2020-09-08 WO PCT/EP2020/075030 patent/WO2021048097A1/en active Application Filing
- 2020-09-08 CN CN202080059702.0A patent/CN114270130A/en active Pending
- 2020-09-08 US US17/640,545 patent/US20220325964A1/en active Pending
Also Published As
Publication number | Publication date |
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EP3789721A1 (en) | 2021-03-10 |
US20220325964A1 (en) | 2022-10-13 |
CN114270130A (en) | 2022-04-01 |
WO2021048097A1 (en) | 2021-03-18 |
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