• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    There is provided a urea reservoir (100) comprising a plate (12) of plastic material arranged inside the reservoir. The plate is such that it permanently integrates at least one resistive element (15).
    公开号:FR3038000A1
    申请号:FR1556096
    申请日:2015-06-29
    公开日:2016-12-30
    发明作者:Jean-Francois Berard；Stephane Leonard
    申请人:Plastic Omnium Advanced Innovation and Research SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a tank for storing a solution of an ammonia precursor for a SCR system (Selective Catalytic Reduction) of a motor vehicle. More specifically, the invention relates to a heating device for a storage tank of an aqueous solution of urea (hereinafter also called urea tank). A urea tank for an SCR system generally includes a heater for liquefying the urea solution so that it can be injected into the vehicle exhaust line when starting under freezing conditions.
    [0002] Several urea reservoirs equipped with a heating device are known. For example, WO 2006/064001 proposes a urea tank with a heating system using a bypass of the engine cooling circuit. This implementation is complex and expensive. WO 2008/138960 proposes a urea reservoir with a flexible heater comprising resistive tracks affixed to a flexible film or arranged between two flexible films. Mounting such flexible films in the tank requires a large number of attachment points. One of the aims of the invention is therefore to propose an alternative to current urea tanks equipped with a heating device.
    [0003] Therefore, in a particular embodiment of the invention, there is provided a urea reservoir comprising a plastic plate arranged inside the reservoir. The plate is such that it incorporates permanently at least one resistive element. Thus, the present invention provides a urea reservoir provided with one or more plastic heating plates. Here, plate is understood to mean a generally flat thin product, the height of which is small, compared to the other two dimensions, whether the straight section is rectilinear or not, for example in crenellations, sinusoidal such as a corrugated sheet, or the like.
    [0004] The plate according to the invention acts as a radiator or heat diffuser. Indeed, when a current is passed through the resistive elements, the resistive elements are heated by the Joule effect and this heat is dissipated by the plate according to the invention. It should also be noted that the plate provides a dual function of radiator and physical protection of the resistive elements.
    [0005] The plate according to the invention is rigid. Here, rigid means that the thickness of this plate is such that it does not flex under the effect of the force exerted by the finger of a user under normal conditions of use. More specifically, rigid means an element which, by being held in a holding point and subjected to a point of application of force away from the holding point to a deformation force, can not be reversibly curved. , in particular beyond a curvature angle of a few degrees, especially beyond 15 °, preferably 10 °, more preferably 5 °, the angle of curvature being the angle between a straight line passing through the point 10 and tangent to the element at this point and the line through the point of application and tangent to the element at this point. Preferably, the plate according to the invention has a rigidity (defined as being equal to (Eh3) / (12 (1-v2)) where E is the Young's modulus of the rigid part measured according to ASTM D790-03, h is its thickness and v is the fish coefficient of its constituent material) greater than 4000 Nm In a particular embodiment, the plate may be a single piece formed by injection of a thermoplastic material or a composite material. In a first variant, the plate is obtained by injection of plastic material overmoulding on the (s) element (s) resistive (s). In another variant, the plate is obtained by plastic injection molding on a plastic support carrying the resistive element (s). This gives a rigid one-piece plate in the center of which is embedded the (s) element (s) resistive (s). In another particular embodiment, the plate may be formed by assembling two half-shells, and between which one or more resistive elements have been arranged. For example, each half-shell may be obtained by molding a thermoplastic material or a composite material. For example, each half-shell can be obtained by injection or by thermoforming. The half-shells can then be assembled by gluing or welding. Thus, the resistive element or elements are encapsulated inside the plate. An advantage of the hot plates according to the invention is that they can have any shape possibly even complicated so that they can be used to heat various areas inside the tank.
    [0006] In an advantageous embodiment, the urea reservoir may be formed by assembling two half-shells, and between which one or more hotplates according to the invention have been placed beforehand. For example, each half-shell may be obtained by molding a thermoplastic material or a composite material. For example, each half-shell can be obtained by injection or by thermoforming. In a particular embodiment, each half-shell may be equipped with one or more heating plates according to the invention or with one or more heating plate halves according to the invention. Advantageously, the tank and the plate according to the invention are made of plastics material.
    [0007] By plastic is meant any material comprising at least one synthetic resin polymer. All types of plastics may be suitable. Well-suited plastics belong to the thermoplastics category.
    [0008] Thermoplastic means any thermoplastic polymer, including thermoplastic elastomers, and mixtures thereof. The term "polymer" denotes both homopolymers and copolymers (especially binary or ternary). Examples of such copolymers are, but are not limited to: random copolymers, block copolymers, block copolymers and graft copolymers. In particular, it is possible to use polyolefins, thermoplastic polyesters, polyketones, polyamides and their copolymers. A mixture of polymers or copolymers may also be used, as well as a mixture of polymeric materials with inorganic, organic and / or natural fillers such as, for example, but not limited to: carbon, salts and other inorganic derivatives natural or polymeric fibers. Excellent results can be obtained with high density polyethylene (HDPE) or polyamide-6,6. Advantageously, the plate according to the invention can be positioned between 0 30 and 30 mm above the bottom of the tank so as to cover the largest possible surface of the tank and to be in contact with the urea even for weak filling levels of the tank. The plate according to the invention can be fixed to the tank by any means (clipping, screwing, welding, overmoulding, gluing).
    [0009] For example, one of the half-shells forming the reservoir may be provided with internal slides. Such inner slides may be formed during injection molding of the half-shell. In this example, the plate may be equipped with a deformable elastic foot which is adapted to cooperate with the internal slides. Thus, the plate is fixed on the half-shell by sliding the foot between the inner slides. This technique is for example described in the document EP 0875411 in the name of the applicant. In an advantageous embodiment, the foot may comprise an electrical connector to which the resistive elements of the plate are connected. In this embodiment, the inner slides may include an end stop to stop the stroke (i.e. slip) of the foot in the inner slides. The end of travel stop may comprise a complementary electrical connector. Thus, in the final position of mounting the plate on the half-shell, the electrical connector and the complementary electrical connector can mate so as to form an electrical connection for the power supply of the resistive elements of the plate. Indeed, the complementary electrical connector 15 may comprise an end accessible from outside the tank (once it is manufactured) and which can be connected to a power source. Advantageously, sealing means may be provided to protect the electrical connectors from the corrosive environment (i.e. urea). In another embodiment, one of the half-shells forming the reservoir may be provided with one or more plastic pins. The plate is mounted on the pin so that a portion of the pin passes through the plate. Next, a portion of the portion of the pin which passes through the plate is melted and the molten portion is pressed so that the molten portion winds freely around the pin so as to form a pin head configured to hold the plate. on the pawn. This technique is for example described in the international application PCT / FR / 2014/053531 (not yet published) in the name of the applicant. For example, the plate may comprise an electrical connector to which the resistive elements are connected. The reservoir may comprise an opening configured to receive a component or a technical module comprising at least one component (pump, level / quality sensor, filter, etc.). Advantageously, the component or the technical module can be equipped with a power point on which the electrical connector can be connected. Thus, the electrical connector is adapted to cooperate with a complementary electrical connector provided on the tank or on a component attached to the tank, for the current supply of the resistive element or elements. In this way, the resistive elements can be supplied with current. An example of a technical module is described in EP 0875411 in the name of the applicant. In a first variant, the electrical connector of the plate may be formed by free ends of electrical wires. In another variation, the electrical connector of the plate may be a standard connector of the type known as "Molex" (trademark) or "Tyco" (trademark). In freezing conditions, it may be desirable to have a strongest plate possible. Thus, in a particular embodiment, the plate 10 may be provided with ribs acting as stiffeners. Any other type of stiffening element can be considered. For example, the plate can be covered or can incorporate a film or a layer of stainless steel. In a variant, the resistive element or elements may be dimensioned such that they also fulfill a stiffening function. In another variation, the plate may also include a glass fiber coating to enhance its strength. In a particular embodiment, the resistive elements are metal resistive tracks, and very particularly preferably, a urea resistant metal such as stainless steel.
    [0010] Fig. 1 is a sectional view of a urea tank 100 comprising a plastic hot plate according to a first embodiment of the invention. In this first embodiment, the plate is an anti-ballot device (or anti-roll device) (or baffle, in English). Thus, in the example of FIG. 1, the urea reservoir is provided with a heated anti-ballot device. The partial view of the reservoir illustrated schematically in Figure 1, comprises a wall 10 defining a closed volume for containing urea. FIG. 1 more particularly represents the part of the wall comprising an orifice 11. This orifice 11 is preferably of substantially circular shape, although this shape is not limiting. The axis XX ', which here is locally perpendicular to the plane of the wall, passes substantially through the center of the orifice. The anti-ballot device 12 (i.e. plate according to the invention) comprises an anti-ballot partition 13 and a foot 14 (or platinum). The antiballing partition 13 incorporates a resistive track 15 made of stainless steel.
    [0011] In this example, the foot 14 comprises an electrical cable 16 (i.e. electrical connector) having a first end connected to the resistive track 15 and a second end of which extends outside the tank. The second end can therefore be connected to an external power source (not shown). The orifice 11 is closed sealingly by the foot 14. The foot 14 is introduced into the orifice 11 in a main direction 5 materialized here by the direction of the axis XX ', by a movement going from the inside of the tank to the outside of the tank. The anti-sloshing partition 13 is located on the side of the inner part of the tank. The foot 14 has a flange 141. The flange has an outside diameter greater than the diameter of the orifice 11 so that when the foot 14 is in place, the collar bears on the inner face of the reservoir. The movement of the foot 14 to the outside is then blocked. To prevent disengagement of the foot 14 from the orifice 11, retaining means are provided and are formed by clipped members comprising tabs 17 disposed on the inner face of the wall 10 of the reservoir and extending into the interior of the reservoir. tank. Dentures 18 are disposed on the radially inner face of the tabs. When the foot 14 is inserted into the orifice 11 in the oriented direction of the axis XX ', the flange 141 separates the teeth 18 which, while continuing the insertion movement, close on the flange. In the example of Figure 1, the anti-ballot partition 13 extends inside the tank in the direction of the axis XX '. In other words, the active faces (heating faces) of the anti-sloshing partition 13 are oriented substantially perpendicularly to the bottom of the tank.
    [0012] In an alternative embodiment, the active faces (heating faces) of the anti-sloshing partition may be oriented substantially parallel to the bottom of the tank. For example, the active faces can be positioned between 10 and 20 mm above the bottom of the tank. Fig. 2 is a sectional view of a urea reservoir 200 comprising plastic heating plates according to a second embodiment of the invention. In this second embodiment, the plates form a urea trap. Thus, in the example of Figure 2, the urea reservoir is provided with a heated urea trap. The partial view of the reservoir schematically illustrated in Figure 2, includes a wall 20 defining a closed volume for containing urea. FIG. 2 more particularly represents the part of the wall comprising a hole 21. The orifice 21 is closed in leaktight manner by a module 22. The module 22 comprises, for example, a pump 23. Plates 24, 25, 26, 27 rising inwardly of the tank, substantially perpendicular to the wall of the bottom of the tank, surround the module 22. The plates 24, 25, 26, 27 are molded in one piece with the wall 20. The plates 24, 25, 26, 27 incorporate resistive tracks 241, 251, 261, 271, respectively. The resistive tracks 241, 251, 261, 271 are connected to a supply point (not shown) provided on the module 22, via electrical cables 242, 252, 262, 272. In this example, the wall 20 may be obtained by injection molding plastic over a portion of each of the electric cables 242, 252, 262, 272. Obviously, the invention is not limited to the embodiments described above, and the man In the general context of the claims, the trade can easily determine equivalent provisions for obtaining the desired effects. 20
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. Urea tank (100) comprising a plastic plate (12) arranged inside the tank, characterized in that the plate permanently integrates at least one resistive element (15).
    [0002]
    2. Tank according to claim 1, characterized in that the plate is obtained by plastic injection overmolding on said at least one resistive element.
    [0003]
    3. Tank according to any one of claims 1 and 2, characterized in that the plate comprises an electrical connector which is connected to said at least one resistive element.
    [0004]
    4. Tank according to claim 3, characterized in that the electrical connector is adapted to cooperate with a complementary electrical connector provided on the tank or on a component attached to the tank, for the current supply of said at least one resistive element
    [0005]
    5. Tank according to any one of claims 1 to 4, characterized in that the plate comprises stiffening elements.
    [0006]
    6. Tank according to claim 5, characterized in that the stiffening elements comprise ribs.
    [0007]
    7. Tank according to any one of claims 1 to 6, characterized in that said at least one resistive element comprises one or more track (s) resistive (s) stainless steel.
    [0008]
    8. Tank according to any one of claims 1 to 7, characterized in that at least a portion of the plate forms an anti-ballot device.
    类似技术:
    公开号 | 公开日 | 专利标题
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    EP1607271A1|2005-12-21|Lead -through device for a thin metal sheet
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    WO2018015281A1|2018-01-25|Urea reservoir with heating element and profile
    FR2889099A1|2007-02-02|Hollow plastic component`s portion molding method for fuel tank of vehicle, involves forming portion of plastic component in mold, by molding portion in space, such that molded portion does not present joint line at its surface
    EP3283805A1|2018-02-21|Fluid connection/heating device, fluid transfer circuit incorporating said device, method of assembly of the device and circuit
    同族专利:
    公开号 | 公开日
    FR3038000B1|2019-05-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102006027487A1|2005-09-12|2007-03-15|Robert Bosch Gmbh|Vehicle tank for a liquid reducing agent, in particular for a urea solution|
    DE102010063047A1|2010-12-14|2012-06-14|Robert Bosch Gmbh|Liquid withdrawal module for withdrawing liquid from a liquid tank, liquid tank|
    DE102011084962A1|2011-10-21|2013-04-25|Robert Bosch Gmbh|Plastic molded tank heater, particularly for reducing agent tank of internal combustion engine, has heat distributing device, electrical heater, plastic layer and another plastic layer, where former plastic layer surrounds contour|
    WO2013135404A1|2012-03-15|2013-09-19|Robert Bosch Gmbh|Heat distribution body for a heater of an scr system, and heater|EP3375652A1|2017-03-14|2018-09-19|Veritas Ag|Liquid tank with a plastic sleeve|
    CN109484162A|2017-09-12|2019-03-19|麦格纳斯太尔燃油系统公司|Storage container|
    WO2019068372A1|2017-10-06|2019-04-11|Kautex Textron Gmbh & Co. Kg|Fluid container for a motor vehicle|
    DE102017223862A1|2017-12-28|2019-07-04|Röchling Automotive SE & Co. KG|Semi-finished product for producing a combined heating and Schwappschutzvorrichtung and formed therefrom device|
    WO2019207134A1|2018-04-27|2019-10-31|Plastic Omnium Advanced Innovation And Research|Two-energy heating device for aqueous product reservoir|
    FR3080733A1|2018-04-27|2019-11-01|Plastic Omnium Advanced Innovation And Research|ANTI-BALLOTTING HEATING DEVICE FOR AQUEOUS PRODUCTS TANK|
    法律状态:
    2016-06-28| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-30| PLSC| Search report ready|Effective date: 20161230 |
    2017-06-26| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-28| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1556096A|FR3038000B1|2015-06-29|2015-06-29|RESERVOIR A UREE WITH HEATING DEVICE.|
    FR1556096|2015-06-29|FR1556096A| FR3038000B1|2015-06-29|2015-06-29|RESERVOIR A UREE WITH HEATING DEVICE.|
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