EP3598047A1 - Heat exchanger tube - Google Patents
Heat exchanger tube Download PDFInfo
- Publication number
- EP3598047A1 EP3598047A1 EP18184825.0A EP18184825A EP3598047A1 EP 3598047 A1 EP3598047 A1 EP 3598047A1 EP 18184825 A EP18184825 A EP 18184825A EP 3598047 A1 EP3598047 A1 EP 3598047A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- plate
- exchanger tube
- reinforcement
- plates
- 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.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 claims abstract description 116
- 239000003507 refrigerant Substances 0.000 claims abstract description 44
- 239000012530 fluid Substances 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011324 bead Substances 0.000 description 15
- 238000005219 brazing Methods 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 5
- 238000005476 soldering Methods 0.000 description 5
- 239000005030 aluminium foil Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- 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
- F28D1/03—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 plate-like or laminated conduits
- F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
- F28D1/0325—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
- F28D1/0333—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
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- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00Â -Â F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0085—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2225/00—Reinforcing means
- F28F2225/04—Reinforcing means for conduits
-
- 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
Abstract
Description
- The present invention relates to heat exchangers adapted to vehicle air conditioning systems. More specifically, the present invention deals with heat exchanger tubes used for such heat exchangers and heat exchangers using such heat exchanger tubes.
- Heat exchangers adapted to vehicle air conditioning systems are commonly used as evaporators. They are adapted to cool down an air flow, and this air flow is then transferred to a passenger compartment of the vehicle or any component of the vehicle that needs to be thermally controlled. For this purpose, heat exchangers are conventionally arranged in a Heating, Ventilation and Air-Conditioning (HVAC) device of the vehicle.
- To cool down the air flow passing through it, a heat exchanger comprises a refrigerant fluid circulation circuit. This refrigerant fluid circulation circuit generates heat exchange between said refrigerant fluid and the air flow.
- In conventional heat exchangers, heat exchanger tubes are stacked one another with heat dissipating elements arranged in-between. The refrigerant fluid circulates inside the tubes, racking up calories of air flow passing through the dissipating elements of the heat exchanger.
- Heat exchanger tubes can adopt various structures. According to
US 6,241,011 document, heat exchanger tubes are defined by two different plates joined together by contact. Thanks to this contact, a pair of plates delimits an elementary refrigerant fluid circulation volume part of the refrigerant fluid circulation circuit. The junction of both plates is obtained by brazing, sealing the elementary refrigerant fluid circulation volume. Side plates are arranged at each end of the stacked heat exchanger tubes to connect the heat exchanger tubes to a refrigerant fluid circuit of the vehicle. - Each elementary refrigerant fluid circulation volume communicates with a tank section created from openings arranged in the plates. When the heat exchanger tubes are assembled to form the heat exchanger, the tank sections form together a refrigerant fluid circulation tube extending throughout the heat exchanger tubes and connected to an entry point and to an exit point of the heat exchanger to allow the circulation of the refrigerant fluid in the whole refrigerant fluid circulation circuit.
- When refrigerant fluid circulates through the tank sections and the elementary refrigerant fluid circulation volumes, the internal pressure of the refrigerant fluid can lead to mechanical deformation of the heat exchanger tubes, especially in the region of the tank sections, resulting in potential non-conformities in the exchanger dimensions and/or in mechanical resistance degradation and early failures from fatigue.
- The invention aims to provide a solution at least to this issue, while also providing a heat exchanger tube easy to manufacture, at low cost, and achieving the best possible results in terms of heat exchange.
- For this purpose, the present invention provides a heat exchanger tube for use in a heat exchanger of a motor vehicle, the heat exchanger tube comprising a first plate and a second plate elongating along a longitudinal plane, joined to each other to form an inner volume dedicated to refrigerant fluid circulation, the inner volume communicating with at least one tank section created from a first opening arranged in the first plate to a second opening arranged in the second plate, wherein the tank section comprises at least one reinforcement element extending from the first plate to the second plate.
- Advantageously, the reinforcement element may extend from the first plate to the second plate perpendicularly to said longitudinal plane.
- In an aspect of the invention, the first opening and the second opening are aligned perpendicularly to said longitudinal plane.
- In an example, the reinforcement element may extend from one of the plates, at an edge of the plate that surrounds respective opening, first opening or second opening, said opening being the one that defined the tank section.
- The plates of a heat exchanger tube according to the invention comprise a main part elongating along the longitudinal plane and protruding brackets extending from edges of the main part slightly perpendicularly to the longitudinal plane. In an embodiment, the main part of the heat exchanger plates is slightly rectangular. To form the heat exchanger tube according to the invention, the first plate is placed so that its protruding brackets extend towards the second plate, and the second plate is placed so that its protruding brackets extend towards the first plate. When joined to each other, for example by brazing, the first and second plates and their protruding brackets define an inner volume dedicated to refrigerant fluid circulation. When the first and second plates are joined to each other, the longitudinal planes of the first and second plates are parallel and define the direction of a longitudinal plane of the heat exchanger tube according to the invention.
- In this document, "inner" will refer to the parts and sides of the first and/or second plates and/or heat exchanger tube according to the invention located inside of said inner volume, and "outer" will refer to the parts and sides of the first and/or second plates and/or heat exchanger tube located outside of said inner volume.
- In the heat exchanger tube according to the invention, the first and second plates have at least one opening arranged in their main part: the at least one opening arranged in the first plate will be hereafter referred to as first opening, and the at least one opening arranged in the second plate will be hereafter referred to as second opening. In an embodiment, the at least one opening arranged in each plate is circular or ellipsoidal.
- Each opening is delimited by a thick collar coming with and protruding at the outer side of the main part of the considered plate, slightly perpendicularly to it. In other words, a thick collar is formed along the perimeter of each opening. In a heat exchanger tube according to the invention, the thick collar of the at least one first opening arranged in the first plate forms a protruding bead extending slightly perpendicularly to the main part of the first plate and directed away from the second plate, and the thick collar of the at least one second opening arranged in the second plate forms a protruding bead extending slightly perpendicularly to the main part of the second plate and directed away from the first plate. At the inner side of the first and second plates, the thick collars form recessed parts corresponding to the above-mentioned protruding beads.
- When the first and second plates are joined to each other to form the heat exchanger tube according to the invention, the openings arranged in each plate are facing each other and are aligned perpendicularly to the main parts of the plates, and their thick collars protrude away from the previously-described inner volume. The openings and their thick collars define a tank section communicating with the inner volume and allowing refrigerant fluid circulation along with others heat exchanger tubes when the heat exchanger tube is associated with other similar heat exchanger tubes to form a heat exchanger for a motor vehicle.
- More precisely, the tank section is formed by the facing openings arranged in the first and second plates and the recessed parts of the thick collars of these openings. It has to be noticed that when the first and second plates are joined to each other to form the heat exchanger tube according to the invention, the inner surfaces of the main parts of these plates are pressed against each other, especially in the region of the tank section, so that no refrigerant fluid leakage can occur.
- According to the invention, the tank section comprises at least one reinforcement element extending from the first plate to the second plate, perpendicularly to the longitudinal plane of each plate. The reinforcement element comes with the first and second plates and extends from one of them to the other one. In other words, the reinforcement element links the first and the second plates together in the region of the tank section. It must be understood here that the reinforcement element is arranged in the region of the previously-described openings, more precisely in the region of the thick collars of said openings.
- The reinforcement element extends perpendicularly to the previously-described longitudinal plane of the heat exchanger tube, so that it allows refrigerant fluid circulation within the inner volume and the tank section without any loss in the refrigerant fluid flowrate. This reinforcement element reduces the mechanical deformation resulting from the internal pressure of the refrigerant fluid. Especially, the reinforcement element prevents the first and second plates to move away from each other under mechanical deformation resulting of said internal pressure.
- According to the invention, the reinforcement element comprises a first female reinforcement portion extending from a thick collar of a first opening towards the previously-described inner volume and a second male reinforcement portion extending from a thick collar of a first opening towards said inner volume. More precisely, the first female reinforcement comes with and extends from a thick collar of the at least one first opening arranged in the first plate, and the second male reinforcement portion comes with and extends from a thick collar of the at least one second opening arranged in the second plate.
- When the first and second plates are joined to each other, the second male reinforcement portion cooperates with the first female reinforcement portion so they can be joined to each other, for example by brazing, their assembly creating the reinforcement element.
- In an embodiment, the length of the joined part of the first female and second male reinforcement portions is approximately two times the thickness of the first and second plates. The length of the joined part of the first female and second mal reinforcement portions is defined as the dimension of the cooperating part of these two portions, that is, the dimension, measured perpendicularly to the above-described longitudinal plane of the heat exchanger tube, on which the male second reinforcement portion cooperates with the female first reinforcement portion to form the reinforcement element. The thickness of the plates is defined as the dimension of these plates measured perpendicularly to the longitudinal plane along which these plates extend.
- According to a first example of an embodiment in which the main parts of the first and second plates are slightly rectangular, the reinforcement element extends slightly parallel to the width of the first and second plates, that is, slightly parallel to the short side of their rectangular shape. According to this example, and considering the previously-described circular or ellipsoidal shape of the openings defining the tank section, the first female reinforcement portion and the second male reinforcement portion of the reinforcement element extend on approximately a quarter of the perimeter of the thick collars of these openings. Preferentially, each reinforcement portion is located in the region of the opening perimeter nearest of a width edge of the main part of the considered plate. According to an example, the first female reinforcement portion and the second male reinforcement portions show a slightly conical profile, in order to make the cooperation of these two parts easier.
- According to another example of the same embodiment, the reinforcement element extends slightly parallel to a longitudinal edge of the first and second plates, that is, slightly parallel to the longest side of their rectangular shape. According to this example, the reinforcement element is made of reinforcement wings symmetrically arranged with respect to a longitudinal axis of the above-described openings. Referring to a circular openings shape, diametrically opposite reinforcement wings are arranged in the tank section. Referring to an ellipsoidal openings shape, reinforcement wings are symmetrically arranged along the axis, major or minor, of the ellipsoidal shape that is parallel to the width of the plates.
- In an embodiment, at least two openings are arranged at a first distal extremity of each plate, the two openings being identical, circular or ellipsoidal, these at least two openings are aligned parallel to the width of the rectangular main part of the first and second plates, and at least two openings are arranged at a second distal extremity of each plate, the two openings being identical and aligned parallel to the width of the rectangular main part of the first and second plates. The result is that such a heat exchanger tube has at least four tank sections. According to the invention, each of these tank sections has a reinforcement element as previously described. Generally speaking, a heat exchanger tube according to the invention counts as many reinforcement elements as it counts tank sections.
- The invention extends to a heat exchanger for a motor vehicle, the heat exchanger comprising a plurality of heat exchanger tubes as described above, stacked parallel to each other along a direction perpendicular to their longitudinal plane. Preferentially, side plates are arranged at each end of the plate stack, the side plates having an entry point and an exit point to connect the tank tube formed by the assembly of the tank sections of each heat exchanger tube to a refrigerant fluid circuit of a motor vehicle.
- The invention also extends to a process for manufacturing a heat exchanger tube as described above. In an embodiment, the heat exchanger tube is made from aluminium plates of thickness in the range of 190 to 270 micrometres. According to an example, the plates of each heat exchanger tube, including the openings and their thick collars, are made for example by stamping an aluminium sheet in a press, the edges and protruding brackets of these plates, for example, cut and, then, folded, from the stamped sheet.
- According to the invention, during this forming process, the material necessary to create the reinforcement portions of the reinforcement elements is kept, and the reinforcement portions are then folded towards the inner surface of the main part of the considered plate in a further step of the forming process. According to various examples, the shape of the reinforcement portions can be stamped from the aluminium foil when forming the tank section and its thick collar, or it can be cut from the foil, before or after stamping the tank section and its thick collar.
- As described above, the invention reduces the risk of mechanical deformation of the heat exchanger tube, especially in the region of the tank section, in which constraints resulting from the refrigerant fluid pressure are high. This way, the invention achieves his goal.
- Other specificities, details and characteristics of the present invention will be highlighted thanks to the following description, given for general guidance, in relation with the following figures :
-
figure 1 is a general view of a heat exchanger including heat exchanger tubes according to the present invention, -
figures 2a and 2b respectively show a general view and a cross-section view of a detail of a heat exchanger tube illustrated onfigure 1 , -
figures 3a and 3b are close-up perspective views of a detail of a plate of a heat exchanger tube according to a first example of the invention, -
figure 4 is a general perspective view of a detail of a heat exchanger tube according to the first example of the invention illustrated byfigures 3a and 3b , -
figure 5 is a general view of an embodiment of a heat exchanger tube according to the first example illustrated byfigure 3a, figure 3b , andfigure 4 , -
figures 6a and 6b are close-up perspective views of a detail of a plate of a heat exchanger tube according to a second example of the invention, -
figure 7 is a general perspective view of a detail of a heat exchanger tube according to the second example of the invention illustrated byfigures 6a and 6b , - and
figure 8 illustrates an example of a plate of a heat exchanger tube according to the invention during its forming process. - Note that features and different embodiments of the invention may be combined with one another in various combinations, as well as they are not incompatible or exclusive to one another. More particularly, it is possible to imagine variants of the invention comprising only a selection of the features described hereinafter, without the other characteristics described, if said selection of features provides a technical advantage or if it allows to distinguish the invention over the prior art.
- Especially, the embodiments described hereafter are combinable if said combination is functional from a technical point of view.
- In the following figures, features common to several figures have the same reference.
- Starting from
figure 1 , a plurality ofheat exchanger tubes 1 of the invention are stacked in-between a plurality ofdissipation devices 2. Bothheat exchanger tubes 1 anddissipation devices 2 are oriented parallel to each other, according to a longitudinal plane P of one of theheat exchanger tubes 1. -
Heat exchanger tubes 1 anddissipation devices 2 are integrated inside aheat exchanger 500 and alternately stacked between twoside mounting flanges side mounting flanges heat exchanger tubes 1.Heat exchanger tubes 1 anddissipation devices 2 form acore 550 of theheat exchanger 500, saidcore 550 being the part which is crossed by anair flow 600 and where therefrigerant fluid 700 flows. - A first
side mounting flange 50 is blind. A secondside mounting flange 51, opposed to the firstside mounting flange 50 versus thecore 550, comprises afirst mouth 52 and asecond mouth 53 at a samedistal extremity 54 of the secondside mounting flange 51. Thefirst mouth 52 receives aninput plug 55, thesecond mouth 53 receives anoutput plug 56. Theinput plug 55 and theoutput plug 56 are intended to join theheat exchanger tubes 1 to a refrigerant circuit. Therefrigerant fluid 700 enters theheat exchanger 500 under a liquid form thanks to theinput plug 55, then it is progressively vaporized inside theheat exchanger tubes 1, and it finally exits theheat exchanger 500 under a gaseous form thanks to theoutput plug 56. Thus, the diameter of theinput plug 55 is required to be smaller than the diameter of theoutput plug 56. - Each
heat exchanger tube 1 has a globally flat shape. This shape optimizes the heat exchange between theheat exchanger tubes 1 anddissipation devices 2. Indeed, it ensures a good contact betweenheat exchanger tubes 1 anddissipation devices 2, sinceheat exchanger tubes 1 also supports thecorrugated dissipation devices 2. - In the
heat exchanger 500, heat exchange is made between therefrigerant fluid 700 and theair flow 600 crossing along thedissipation devices 2. Theair flow 600 licksheat exchanger tubes 1 anddissipation devices 2. The corrugated shape ofdissipation devices 2 optimizes the heat transfer from theair flow 600 to therefrigerant fluid 700, since it considerably increases heat exchange surfaces comparing to a non-corrugated device. - While circulating through the
heat exchanger tubes 1 of theheat exchanger 500 operating as an evaporator, therefrigerant fluid 700 collects calories from theair flow 600, and consequently cools thisair flow 600 down. -
Figure 2a shows a general view of aheat exchanger tube 1 according to a first example of embodiment of the present invention, and twoadjacent dissipation devices 2.Figure 2b shows a cross-section of theheat exchanger tube 1 illustrated byfigure 2a . - Referring to
figure 2a and figure 2b , theheat exchanger tube 1 comprises afirst plate 3 and asecond plate 4, adapted to be joined and brazed. - According to the example shown in the figures, the
first plate 3 has amain part 30 extending along a longitudinal plane P, and thesecond plate 4 has amain part 40 extending along a longitudinal plane parallel to the above-mentioned longitudinal plane P. According to this example, themain parts plates main parts first plate 3 andsecond plate 4 are parallel in theheat exchanger tube 1. - The first and
second plates brackets main parts brackets brackets 31 of thefirst plate 3 are oriented towards thesecond plate 4, and the protrudingbrackets 41 of thesecond plate 4 are oriented towards thefirst plate 3, so that, when assembled and joined to each other, for example by brazing, the first and thesecond plates inner volume 5 between theirmain parts brackets inner volume 5 is shown onfigure 2b , which illustrates a cross section of theheat exchanger tube 1 shown infigure 2a along a transversal plane P1 perpendicular to the above-described longitudinal plane P. - Each
plate ridges ridges first plate 3 and thesecond plate 4 are joined to each other to form theheat exchanger tube 1, eachridge 32 of thefirst plate 3 is pressed against aridge 42 of thesecond plate 4, so that they divide theinner volume 5 in channels 6 dedicated to refrigerant fluid circulation within theheat exchanger tube 1. This is shown onfigure 2b . Channels 6 split theinner volume 5 and so, spread out the circulatingrefrigerant fluid 700 inside theheat exchanger tube 1. This homogeneous splitting results in a better heat exchange. - According to the example shown in the figures, the
first plate 3 has twofirst openings 80 located at a same firstdistal extremity 35 of theheat exchanger tube 1, and thesecond plate 4 has twosecond openings 81 located at the same firstdistal extremity 35 of theheat exchanger tube 1. According to the example shown infigure 2a and figure 2b , the first andsecond openings distal extremity 35 of theheat exchanger tube 1, that is, to the width of the rectangularmain part second plates - In a
heat exchanger tube 1 according to the invention,first openings 80 andsecond openings 81 are facing one another, that is, afirst opening 80 is aligned with asecond opening 81 perpendicularly to the above-mentioned longitudinal plane P and longitudinal axis X. - Each
first opening 80 is surrounded by a firstthick collar 82 and eachsecond opening 81 is surrounded by a secondthick collar 83, in the manner of an eyelet, both the firstthick collar 82 and the secondthick collar 83 protruding from the longitudinal plane P of theheat exchanger tube 1. More precisely, the firstthick collar 82 comes with themain part 30 of thefirst plate 3 and forms a protruding bead at the outer side of themain part 30 of thefirst plate 3, that is, on the side of this plate opposite to the above-describedinner volume 5. The same way, the secondthick collar 83 comes with themain part 40 of thesecond plate 4 and forms a protruding bead at the outer side of saidmain part 40, that is, on the side of thesecond plate 4 opposite to saidinner volume 5. - On the inner side of both the
first plate 3 and thesecond plate 4, that is, within theinner volume 5, the firstthick collar 82 and the secondthick collar 83 form a recessed part, respectively 84, 85. The recessedparts thick collars volume 7 communicating with theinner volume 5 and hereafter referred to astank section 7. Thetank section 7 is designed to connect differentheat exchanger tubes 1 for allowing refrigerant fluid circulation along aheat exchanger 500 as illustrated byfigure 1 . - For this purpose, the protruding bead of a first
thick collar 82 and the protruding bead of a secondthick collar 83 of aheat exchanger tube 1 match with the immediate adjacent protruding beads of first and secondthick collars heat exchanger tube 1. Then, both firstthick collars 82 and secondthick collars 83 are in contact and joined to each other, for example by brazing, to seal an inner volume dedicated torefrigerant fluid 700 circulation, called a collector. In theheat exchanger 500 as illustrated byfigure 1 , thetank sections 7 of eachheat exchanger tube 1 and the collectors between eachheat exchanger tube 1 form together a refrigerant fluid circulation tube, not visible on the figures, dedicated to the distribution of therefrigerant fluid 700 along theheat exchanger 500. In theheat exchanger 500, the refrigerant fluid circulation tube is connected to both the previously-describedinput plug 55 andoutput plug 56, so that the input plug 55 forms an entry point for therefrigerant fluid 700 and the output plug 56 forms an exit point for therefrigerant fluid 700. - As shown on
figure 2a , adissipation device 2 extends in a plane parallel to the longitudinal plane P of theheat exchanger tube 1. Twodissipation devices 2 are distributed one both sides of theheat exchanger tube 1, in order to have a contact area between theplates dissipation devices 2. This contact area covers almost theentire plates distal extremity 35 of theheat exchanger tube 1, in order to have thefirst openings 80, thesecond openings 81, the firstthick collars 82 and a secondthick collars 83 free to face otherfirst openings 80,second openings 81, firstthick collars 82 and secondthick collars 83 of an immediate adjacentheat exchanger tube 1. - The
dissipation device 2 has periodic corrugation crests 20, 21 and a definedpitch 25. Thepitch 25 is the distance between two adjacent corrugation crests 20, 21. In other words, thepitch 25 is the half of a distance between two adjacent corrugation crests 20 or crests 21, crests 20 or crests 21 considered on the same side of the plane of thedissipation device 2. Thepitch 25 is measured according to the longitudinal axis X ofplates Crests heat exchanger tube 1 or an immediate adjacentheat exchanger tube 1 in aheat exchanger 500. The periodic corrugation crests 20, 21, are symmetrically arranged regarding the plane of thedissipation device 2. -
Figure 3a and figure 3b are close-up perspective views of the above-defined firstdistal extremity 35 of aplate heat exchanger tube 1 according to a first example of the invention.Figure 3a shows the inner face of aplate figure 3b shows the outer face of aplate inner volume 5. Note that the details and characteristics exposed here generically apply to either a first orsecond plate heat exchanger tube 1 according to the first example of the invention. - Referring to
figure 3a and figure 3b , athick collar opening main part plate plate parts plates reinforcement portion reinforcement element 9 comes with and extends from the protruding bead formed by thethick collar reinforcement portion inner volume 5. Referring to the example illustrated byfigure 3a and figure 3b , thereinforcement portion thick collar reinforcement portion distal extremity 35 of theheat exchanger tube 1, that is, to the width of the rectangularmain part plate reinforcement portion first opening inner volume 5. - In an embodiment visible in
figure 3a or6a , the length L of asoldering area 96 of thereinforcement portion plate corresponding plate plate peripheral edge 95 that extends into a plane R which is parallel to the longitudinal plane P, the length L of thesoldering area 96 of thereinforcement portion reinforcement portion soldering area 96 of onereinforcement portion 90 is configured to superpose thesoldering area 96 of theother soldering area 96 coming with thereinforcement portion 91 of the other plate. The peripheral edge of eachplate inner volume 5 of the channel. -
Figure 4 shows an assembledheat exchanger tube 1 according to the first example of the invention illustrated byfigure 3a and figure 3b . - It appears from this figure that when a
first plate 3 and asecond plate 4 are joined to create aheat exchanger tube 1, thereinforcement portions reinforcement element 9 extending across the above-describedtank section 7. It comes from the above that thereinforcement element 9 extends from thefirst plate 3 to thesecond plate 4 and links these two plates together. - To make the cooperation between them possible, the
reinforcement portions female reinforcement portion 90 and a secondmale reinforcement portion 91. The respective dimensions of the firstfemale reinforcement portion 90 and the secondmale reinforcement portion 91 are defined so that, when assembling thefirst plate 3 andsecond plate 4 to form theheat exchanger tube 1, the secondmale reinforcement portion 91 inserts in the firstfemale reinforcement portion 90. The tworeinforcement portions - According to an example, the diameters of the conical shape of the first
female reinforcement portion 90 can be slightly greater than the diameters of the conical shape of the secondmale reinforcement portion 91. According to other examples, the firstfemale reinforcement portion 90 can have a general cylindrical shape and the secondmale reinforcement portion 91 can have a conical shape designed so that it can lock within the cylindrical shape of the firstfemale reinforcement portion 90. - Whatever the various shapes of the
reinforcement portions reinforcement element 9 links thefirst plate 3 and thefirst plate 4 of theheat exchanger tube 1 across thetank section 7. Thereinforcement element 9 so prevents mechanical deformation of theheat exchanger tube 1 resulting from internal pressure of therefrigerant fluid 700 in thetank section 7. -
Figure 5 shows awhole plate heat exchanger tube 1 according to the first example of the invention illustrated byfigures 3a, 3b and4 . According to this example,plates heat exchanger tube 1, also have openings 80', 81', arranged at a seconddistal extremity 36 of theheat exchanger tube 1, opposed to the firstdistal extremity 35 with respect to the previously-describedridges distal extremity 36 are identical and disposed parallel to those arranged at the firstdistal extremity 35 of theheat exchanger tube 1. As shown byfigure 5 , each opening 80', 81', arranged at the seconddistal extremity 36, has a reinforcement portion 90', 91'. This means that areinforcement element 9 is arranged in each tank section 7' defined by the openings 80', 81', at the seconddistal extremity 36. Generally speaking, the invention provides that theheat exchanger tube 1 has asmany reinforcement elements 9, 9' as it hastank sections 7, 7'. - Referring to
figure 5 , it has to be noticed that thereinforcement portions distal extremity 35 and the reinforcement portions 90', 91', at the seconddistal extremity 36 are symmetrically arranged with respect to a median plane P2 ofplate distal extremity reinforcement portions openings main part plate -
Figure 6a and figure 6b are close-up perspective views of one of thedistal extremities distal extremity 35, of aplate heat exchanger tube 1 according to a second example of the invention.Figure 6a shows the inner face of aplate figure 6b shows the outer face of aplate second plate heat exchanger tube 1 according to the first example of the invention. -
Thick collars openings figure 6a and figure 6b , together with the protruding beads thesethick collars plate parts thick collars plate figure 6a and figure 6b . As previously described, areinforcement portion reinforcement element 9 comes with and extends from the protruding bead formed by eachthick collar inner volume 5. - According to this second example of the invention, the
reinforcement portions heat exchanger tube 1. Moreover, according to this second example, eachreinforcement portion wings longitudinal axis corresponding opening longitudinal axis corresponding opening longitudinal axis openings plates corresponding tank sections 7. - Referring to
figure 6a and figure 6b , thewings plate figure 6a and figure 6b , thewings plate wings -
Figure 7 shows an assembledheat exchanger tube 1 according to the second example of the invention illustrated byfigure 6a and figure 6b . - It appears from this figure that when a
first plate 3 and asecond plate 4 are joined to each other to form aheat exchanger tube 1, thewings reinforcement portions reinforcement element 9 extending across the above-describedtank section 7, from thefirst plate 3 to thesecond plate 4. More precisely, thewings 90a of thefirst plate 3 cooperate with thewings 91a of thesecond plate 4, and thewings 90b of thefirst plate 3 cooperate with thewings 91b of thesecond plate 4. As for the previously-described first example, in this second example, to make this cooperation possible, eachreinforcement wing male reinforcement wing - According to an example, the
male reinforcement wings longitudinal axis openings female reinforcement wings male reinforcement wings 91a can be slightly oriented towards the longitudinal edges 43 of thesecond plate 4 and themale reinforcement wings 91b can be slightly oriented towards the longitudinal axis X of thesecond plate 4, so that, when the first andsecond plates heat exchanger tube 1, themale reinforcement wings female reinforcement wings - As described previously for the first example of the invention, it results from the configuration of the
reinforcement portions reinforcement element 9 links thefirst plate 3 and thefirst plate 4 of theheat exchanger tube 1 across thetank section 7. More precisely, according to this second example of the invention, tworeinforcement elements 9 are arranged in eachtank section 7, symmetrically disposed regarding the previously-definedlongitudinal axis tank section 7. This results in higher reinforcement performance for theheat exchanger tube 1 according to this second example of the invention. -
Figure 8 shows an example of aplate heat exchanger tube 1 during its forming process, according to the second example illustrated byfigures 6a, 6b , and7 . - According to the invention, first and
second plates heat exchanger tube 1 are formed from aluminium foils of thickness ranging from approximately 190 to 270 micrometres. - As shown by
figure 8 , themain part plate openings thick collars openings - According to the invention, the material necessary to create the
reinforcement wings reinforcement portions figure 8 where it can be seen that thewings main part corresponding plate - In a further step of plates forming, the
wings reinforcement portions parts thick collars figure 8 . - The invention so provides a simple and low-cost means for manufacturing the plates of a heat exchanger tube according to the above-described characteristics.
- We understand thanks to the above description, that the present invention proposes a simple design of heat exchanger tube resistant at working pressure and burst pressure thanks to the reinforcement elements, for a long term sustainability. This heat exchanger tube is easily manufactured, at a low cost. It allows good thermal exchange performance. This heat exchanger tube is dedicated to heat exchanger and can be found in a Heating, Ventilation and Air-Conditioning device of a motor vehicle. This kind of heat exchanger can be easily integrated into vehicle air conditioning systems in order to optimize the heat exchange between the air flow dedicated to the passenger compartment cool down and the refrigerant fluid circulating inside heat exchanger tubes of the invention.
- However, the invention is not limited to resources and patterns described and illustrated here. It also include all equivalent resources or patterns and every technical associations including such resources. More particularly, the shape of the heat exchanger tube do not affect the invention, insofar as the heat exchanger tube for use in a motor vehicle, in fine, has the same functionality as describes in this document.
Claims (10)
- A heat exchanger tube (1) for use in a heat exchanger of a motor vehicle, the heat exchanger tube (1) comprising a first plate (3) and a second plate (4) elongating along a longitudinal plane (P), joined to each other to form an inner volume (5) dedicated to refrigerant fluid (700) circulation, the inner volume (5) communicating with at least one tank section (7) created from one first opening (80) arranged in the first plate (3) to one second opening (81) arranged in the second plate (4), wherein the tank section (7) comprises at least one reinforcement element (9) extending from the first plate (3) to the second plate (4).
- The heat exchanger tube (1) according to the previous claim, wherein the reinforcement element (9) comprises a first female reinforcement portion (90) extending from a thick collar (82) of a first opening (80) towards said inner volume (5) and a second male reinforcement portion (91) extending from a thick collar (83) of a second opening (81) towards said inner volume (5).
- The heat exchanger tube (1) according to the previous claim, wherein the first male reinforcement portion (90) and the second female reinforcement portion (91) are joined to each other and the length (L) of the joined part is approximately two times the thickness (T) of the plates (3, 4).
- The heat exchanger tube (1) according to any of the previous claims, in which the plates (3, 4) have a rectangular shape, wherein the reinforcement element (9) extends slightly parallel to a width of the plates (3, 4).
- The heat exchanger tube (1) according to the previous claim, wherein the first female reinforcement portion (90) extends on approximately a quarter of the perimeter of the primary opening (80) and the second male reinforcement portion (91) extends on approximately a quarter of the perimeter of the secondary opening (81).
- The heat exchanger tube (1) according to any of claims 1 to 3, in which the plates (3, 4) have a rectangular shape, wherein the reinforcement element (9) extends slightly parallel to a longitudinal edge (33, 43) of the plates (3, 4).
- The heat exchanger tube (1) according to the previous claim, wherein the reinforcement element (9) is made of reinforcement wings (90a, 90b, 91a, 91b) symmetrically arranged with respect a longitudinal axis (800, 810) of the openings (80, 81).
- The heat exchanger tube (1) according to any of the previous claims, wherein the thickness (T) of the plates (3, 4) is in the range of 190 to 270 micrometres.
- Process for manufacturing a heat exchanger tube (1) according to any of the previous claims, in which the reinforcement portions (90, 91) of the reinforcement element (9) are folded from the stamped thick collars (82, 83) of the openings (80, 81).
- A heat exchanger (500) comprising a plurality of heat exchanger tubes (1) according to at least one of the previous claims and having an input plug (55) and an output plug (56) for connecting the plurality of heat exchanger tubes (1) to a refrigerant fluid circuit of a motor vehicle.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18184825.0A EP3598047B1 (en) | 2018-07-20 | 2018-07-20 | Heat exchanger tube |
PCT/EP2019/068587 WO2020016081A1 (en) | 2018-07-20 | 2019-07-10 | Heat exchanger tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18184825.0A EP3598047B1 (en) | 2018-07-20 | 2018-07-20 | Heat exchanger tube |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3598047A1 true EP3598047A1 (en) | 2020-01-22 |
EP3598047B1 EP3598047B1 (en) | 2022-04-06 |
Family
ID=63014448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18184825.0A Active EP3598047B1 (en) | 2018-07-20 | 2018-07-20 | Heat exchanger tube |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3598047B1 (en) |
WO (1) | WO2020016081A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0661508A1 (en) * | 1993-12-28 | 1995-07-05 | Showa Aluminum Corporation | Layered heat exchangers |
US5918664A (en) * | 1997-02-26 | 1999-07-06 | Denso Corporation | Refrigerant evaporator constructed by a plurality of tubes |
WO2002066918A1 (en) * | 2001-02-19 | 2002-08-29 | Showa Denko K.K. | Heat exchanger |
WO2012126687A1 (en) * | 2011-03-23 | 2012-09-27 | Valeo Systemes Thermiques | Connecting reinforcement for between the plates of a heat exchanger |
-
2018
- 2018-07-20 EP EP18184825.0A patent/EP3598047B1/en active Active
-
2019
- 2019-07-10 WO PCT/EP2019/068587 patent/WO2020016081A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0661508A1 (en) * | 1993-12-28 | 1995-07-05 | Showa Aluminum Corporation | Layered heat exchangers |
US6241011B1 (en) | 1993-12-28 | 2001-06-05 | Showa Aluminium Corporation | Layered heat exchangers |
US5918664A (en) * | 1997-02-26 | 1999-07-06 | Denso Corporation | Refrigerant evaporator constructed by a plurality of tubes |
WO2002066918A1 (en) * | 2001-02-19 | 2002-08-29 | Showa Denko K.K. | Heat exchanger |
WO2012126687A1 (en) * | 2011-03-23 | 2012-09-27 | Valeo Systemes Thermiques | Connecting reinforcement for between the plates of a heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
WO2020016081A1 (en) | 2020-01-23 |
EP3598047B1 (en) | 2022-04-06 |
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