• 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:
    The present invention relates to an electric heating device (1) for heating a flow of air passing through a duct of a ventilation, heating and / or air conditioning system of a motor vehicle, the heating device (1 ) comprising at least one heating module (4) contained in a heating body (6), said heating body (6) comprising a housing (8) for controlling and supplying power to the at least one heating module (4), said housing (8) comprising: ▪ a printed circuit board (83) disposed inside said housing (8); ▪ a set of electrical connection bars (86) of the printed circuit board (83) and the at least one heating module (4), the electrical connection busbar (86) being overmolded in an overmolding part (84), said overmolding part (84) also having a sleeve (850) surrounding one end of the electrical connection set ( 86) so as to form an electrical connector (85).
    公开号:FR3076973A1
    申请号:FR1850306
    申请日:2018-01-15
    公开日:2019-07-19
    发明作者:Jonathan Fournier；Romain Delcourt；Pascal Fourgous
    申请人:Valeo Systemes Thermiques SAS；
    IPC主号:
    专利说明:

    The invention relates to an electric heating device for a motor vehicle and to the method of manufacturing said heating device. More particularly, the invention relates to an electric heating device integrated within a ventilation, heating and / or air conditioning installation of a motor vehicle.
    An electric heating device generally comprises at least one heating module contained in a heating body. This heating body, for its part, comprises a control and electrical power supply unit for the heating module or modules inside which a printed circuit can be arranged. Generally, an electrical connector projects from the printed circuit and passes through the housing at a supply port. An additional connector is connected to this electrical connector in order to supply electrical power to the electrical heating device. This electrical connector is generally installed during a dedicated step during the manufacture of the heating device, which can increase production costs. In addition, the arrangement and orientation of this electrical connector may not be optimal and it is therefore difficult to connect the heating device and to control this connection during assembly on the vehicle.
    One of the aims of the present invention is therefore to at least partially remedy the drawbacks of the prior art and to provide an improved heating device.
    The present invention therefore relates to an electric heating device for heating an air flow passing in particular through a duct of a ventilation, heating and / or air conditioning installation of a motor vehicle, the heating device comprising at least one heating module contained in a heating body, said heating body comprising a control and electrical power supply unit for the at least one heating module, said housing comprising:
    a printed circuit placed inside said housing, a set of electrical connection bars for the printed circuit and at least one heating module, the set of electrical connection bars being overmolded in an overmolding part, said overmolding part comprising also a sleeve surrounding one end of the set of electrical connection bars so as to form an electrical connector.
    According to one aspect of the invention, the electrical connector is arranged along a connection axis substantially perpendicular to the axis of the heater body.
    According to another aspect of the invention, the electrical connector is arranged along a connection axis which is substantially parallel or coincident with the plane of the heating body.
    According to another aspect of the invention, the overmolding part comprises positioning pins coming to be inserted in corresponding orifices on the printed circuit.
    According to another aspect of the invention, the heating device comprises a device for positioning and holding the overmold part in the housing, said positioning and holding device comprising:
    at least one hollow female orifice disposed on one or the other of the overmolding part or of the housing, and at least one complementary male appendage disposed on the other element and intended to come within the at least one female orifice.
    According to another aspect of the invention:
    the at least one female orifice is a groove surrounding the overmolding part in a plane perpendicular to the plane of the heating body, and the at least one male appendage is formed by at least two bars arranged one opposite the other within the housing and coming to be inserted in the groove.
    According to another aspect of the invention, the overmolding part is made of polypropylene.
    According to another aspect of the invention, the connection busbar set comprises:
    a first electrically conductive bar comprising a connection tab disposed within the electrical connector, at least one electrical connection with the printed circuit, and at least one connection tab intended to be connected to a heating module, a second electrically conductive bar comprising a connection tab disposed within the electrical connector and at least one electrical connection with the printed circuit, at least a third electrically conductive bar intended to connect the printed circuit with each heating module.
    According to another aspect of the invention, the set of connection bars is soldered on the printed circuit.
    According to another aspect of the invention, the printed circuit is arranged in a plane substantially perpendicular to the plane of the heating body.
    Other characteristics and advantages of the invention will appear more clearly on reading the following description, given by way of illustrative and nonlimiting example, and of the appended drawings among which:
    Figure 1 shows a schematic exploded perspective view of an additional heating device, Figure 2 shows a schematic perspective view of a printed circuit and the electrical connection busbar, Figure 3 shows a schematic perspective view of a printed circuit and the overmolding part, FIG. 4 shows a schematic exploded perspective view of the junction element of a housing, FIG. 5 shows a schematic perspective view in section of the junction element of a case.
    Identical elements in the different figures have the same references.
    The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the characteristics apply only to a single embodiment. Simple features of different embodiments can also be combined and / or interchanged to provide other embodiments.
    In the present description, it is possible to index certain elements or parameters, such as for example first element or second element as well as first parameter and second parameter or even first criterion and second criterion etc. In this case, it is a simple indexing to differentiate and name elements or parameters or criteria that are similar but not identical. This indexing does not imply a priority of an element, parameter or criterion over another and one can easily interchange such names without departing from the scope of this description. This indexing does not imply an order in time for example to assess such or such criteria.
    In the description which follows, reference will be made to an orientation which is a function of the Longitudinal, Vertical and Transversal axes as they are arbitrarily defined by the trihedron L, V, T represented in FIGS. 1 to 5. The choice of names for these axes is not limiting the orientation that the device can take in its application to a motor vehicle.
    As shown in FIG. 1, the heating device 1 comprises at least one heating module 4 configured to transform an electric current into thermal energy, contained in a heating body 6. In the example presented in FIG. 1, the device for heating 1 comprises three heating modules 4, it is however quite possible to imagine a heating device 1 comprising more or less than three heating modules 4.
    The heating device 1 is able to be housed in an air circulation duct of a ventilation, heating and / or air conditioning installation (HVAC for the acronym Heating, Ventilation and Air-Conditioning), so as to transform the electrical energy taken from the vehicle as thermal energy and returning it to the air passing through said HVAC.
    The HVAC is not shown here, but it will be understood that a main duct of this HVAC conventionally comprises an opening made in its wall for the insertion of the additional heating device.
    The heating modules 4 are arranged longitudinally along the longitudinal axis L, in the heating body 6. The heating body 6 comprises, at one end of the heating module (s), a first end 6a comprising a control box 8 and d supply of the heating module 4. At the opposite end of the heating module (s) 4, the heating body 6 has a second end 6b. In the example illustrated in FIG. 1, the first 6a and the second 6b ends are interconnected by crosspieces in order to completely frame the heating module 4, however it is entirely possible to imagine an embodiment where the first 6a and the second 6b ends are independent of each other.
    The heating body 6 is preferably made of a plastic material, for example polypropylene or polyamide, loaded with glass fibers. The housing 8 can be made of a material more resistant to heat than the rest of the heating body 6. In fact, the electrical connections of the heating modules 4 are made at the level of said housing 8 and it can therefore be subjected to high temperatures .
    The heating modules 4 can in particular comprise:
    • at least two conductive assemblies formed:
    ° of a conductive electrode extended longitudinally by a free end of electrode, said free end of electrode being able to be connected to the source of electrical power of the vehicle at the level of housing 8, ° of a retaining plate capable of be made of a metallic material such as aluminum for example, and ° of an interlayer sandwiched and held between the conductive electrode and the retaining plate, said interlayer may in particular be a metal strip folded in accordion and placed between the the conductive electrode and the retaining plate so that an air flow can pass through said interlayer, • at least one ceramic with a positive temperature coefficient effect (PTC), the ceramic being sandwiched between two conductive assemblies.
    According to the different types of heating modules 4, the needs and the type of motor vehicle, the heating device 1 can for example be connected to a 48V or 12V power supply.
    The housing 8 includes in particular a junction element 81 making the connection with the first end 6a of the heating body 6. This junction element 81 in particular forms a housing 820 covered by a cover 82. Inside this housing 820 is disposed a printed circuit 83 for managing the heating modules 4 and a set of electrical connection bars 86 for the printed circuit 83 and the heating modules 4, visible in FIGS. 2 and 3.
    As shown in more detail in FIG. 2, the printed circuit 83 can in particular be arranged along a plane substantially perpendicular to the plane of the heating body 6. In FIG. 1, the plane of the heating body 6 is defined along the longitudinal axis L and the vertical axis V. The plane of the printed circuit 83 is defined along the vertical axis V and the transverse axis T.
    The set of electrical connection bars 86 more precisely comprises a first electrically conductive bar 86a. This first conductive bar 86a comprises a connection tab 860a allowing connection to an electrical pole of an electrical supply. The first conductive bar 86a also includes at least one electrical connection 861a with the printed circuit 83 as well as at least one connection tab 862a. Each connection tab 862a is in particular intended to be connected to a heating module 4 in order to connect the heating modules 4 to the electrical pole connected to the first busbar.
    The electrical connection busbar 86 also includes a second electrically conductive bar 86b. This second conductive bar 86b comprises a connection tab 860b allowing a connection to an electrical pole of an electrical supply different from that of the first connection tab 860a. The second conductive bar 86b also comprises at least one electrical connection 861b with the printed circuit 83.
    The set of electrical connection bars 86 also comprises at least one third electrically conductive bar 86c intended to connect the printed circuit 83 with a heating module 4.
    The connection tabs 860a, 860b are both arranged within an electrical connector 85 visible in FIG. 3.
    The fixing between the printed circuit 83 and the set of electrical connection bars 86 can be advantageously carried out by soldering. This fixing allows electrical conduction and is strong enough to avoid the use of additional fixing means.
    As shown in FIG. 3, the set of electrical connection bars 86 is overmolded in an overmolding part 84. More particularly, the overmolding part 84 also includes a sleeve 850 surrounding an end of the set of electrical connection bars 86 so to form the electrical connector 85. This skirt 850 comes integrally with the body of the overmolding part 84. The overmolding part 84 can in particular be made of polypropylene, for example of cellular polypropylene loaded or not with glass fiber.
    The fact that the set of electrical connection bars 86 is overmolded in an overmolding part 84 and that this overmolding part 84 also forms the electrical connector 85 makes it possible to place the latter directly when the overmolding part is placed in the housing 8 This simplifies the mounting of the heating device by eliminating a dedicated step of fitting the electrical connector 85.
    The electrical connector 85 may in particular be arranged along a connection axis A substantially perpendicular to the axis of the heater body 6, that is to say here the longitudinal axis L. By connection axis A is meant the axis along which a complementary connector is inserted into the electrical connector 85 in order to establish an electrical connection.
    More precisely, the connection axis A of the electrical connector 85 can be substantially parallel or coincident with the plane of the heating body 6. As illustrated in FIG. 3, the connection axis A is thus parallel to the vertical axis V .
    This orientation of the electrical connector 85 allows, when the heating device is installed on the HVAC, to facilitate the connection and the visual control of this connection by an operator.
    H is however quite possible to imagine other embodiments for the orientation of the connection axis A of the electrical connector 85. For example an embodiment in which the connection axis A is substantially perpendicular to the axis of the heating body 6 and the plane of the heating body 6, that is to say that the connection axis A is parallel to the transverse axis T. In yet another embodiment, the axis of connection A of the electrical connector 85 can be substantially parallel to the axis of the heating body 6 and thus be parallel to the longitudinal axis L.
    In order to facilitate the mounting and positioning of the printed circuit 83, the overmolding part 84 can include positioning pins 830 which are inserted into corresponding orifices on the printed circuit 83.
    As shown in Figure 4, the junction element 81 of the housing 8 can be made from two pieces 81a, 81b joined to each other along the vertical axis V. The housing 820 is open on its bottom in order to allow the connection tabs 862a and the third conductive bars 86c to pass. The housing 820 can more particularly have a length along the axis V less than that of the total width of the junction element 81 along the axis V. The junction element 81 can thus comprise a plate 812. At the level of this plate 812, the housing 820 may include an opening 811 in order to allow the overmolding part 84 to pass so that the electrical connector 85 is placed at the level of said plate 812. The plate 812 thus allows the electrical connector 85 to be protected from 'possible shocks especially during storage, handling and mounting of heating device 1. In addition, this saves space at the HVAC level thus avoiding having an overly protruding electrical connector 85.
    The heating device 1, and more particularly the housing 8 may include a device for positioning and holding the overmolding part 84 in said housing 8. This positioning and holding device comprises in particular:
    • at least one hollow female port 840 disposed on one or the other of the overmolding part 84 or of the housing 8, and • at least one complementary male appendage 810 disposed on the other element and intended to come within of the at least one female orifice 840.
    As shown in FIG. 3, the at least one female orifice 840 can be a groove surrounding the overmolding part 84 along a plane perpendicular to the plane of the heating body 6, that is to say along a plane comprising the vertical axis V and the transverse axis T.
    As shown in FIG. 4, the at least one male appendage 810 can be formed in turn by at least two bars arranged one opposite the other within the housing 8, more precisely within the housing 820 of the joining element 81.
    In the example presented, the junction element 81 carries four bars 810 in order to completely surround the overmolding part 84 and thus hold it in the housing 820 without it being able to move, either along the longitudinal axis L , vertical V or transverse T.
    FIG. 5 shows a sectional view of the junction element 81 comprising the overmolding part 84 and the printed circuit 83. In this FIG. 5, on each side of the overmolding part 84, the bars 810 are inserted in the groove 840.
    Thus, it is clear that the heating device 1 according to the invention, due to the fact that the overmolding part 84 includes the electrical connector 85, allows the latter to be easier to mount. In addition, this also allows positioning of the electrical connector 85 such that it is easier for an operator to connect the heating device to an electrical supply and to check whether the connection is correctly made.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. An electric heating device (1) for heating an air flow passing in particular through a duct of a ventilation, heating and / or air conditioning installation of a motor vehicle, the heating device (1) comprising at at least one heating module (4) contained in a heating body (6), said heating body (6) comprising a housing (8) for controlling and supplying power to the at least one heating module (4), said housing ( 8) including:
    a printed circuit (83), disposed inside said housing (8), a set of electrical connection bars (86) of the printed circuit (83) and the at least one heating module (4), characterized in that the electrical connection busbar (86) is molded into an overmolding part (84), said overmolding part (84) also comprising a sleeve (850) surrounding one end of the electrical connection busbar (86) so as to form an electrical connector (85).
    [2" id="c-fr-0002]
    2. Heating device (1) according to the preceding claim, characterized in that the electrical connector (85) is arranged along a connection axis (A) substantially perpendicular to the axis of the heater body (6).
    [3" id="c-fr-0003]
    3. Heating device (1) according to one of the preceding claims, characterized in that the electrical connector (85) is arranged along a connection axis (A) substantially parallel or coincident with the plane of the heating body (6) .
    [4" id="c-fr-0004]
    4. Heating device (1) according to one of the preceding claims, characterized in that the overmolding part (84) has pins (830) for positioning which are inserted into corresponding orifices on the printed circuit (83) .
    [5" id="c-fr-0005]
    5. Heating device (1) according to one of the preceding claims, characterized in that it comprises a device for positioning and holding the overmolding part (84) in the housing (8), said positioning device and holding comprising:
    at least one female orifice (840) hollow disposed on one or the other of the overmolding part (84) or of the housing (8), and at least one complementary male appendage (810) disposed on the other element and intended to come within the at least one female orifice (840).
    [6" id="c-fr-0006]
    6. Heating device (1) according to the preceding claim, characterized in that:
    the at least one female orifice (840) is a groove surrounding the overmolding part (84) along a plane perpendicular to the plane of the heating body (6), and the at least one male appendage (810) is formed by at at least two bars arranged one opposite the other within the housing (8) and coming to be inserted in the groove.
    [7" id="c-fr-0007]
    7. Heating device (1) according to one of the preceding claims, characterized in that the overmolding part (84) is made of polypropylene.
    [8" id="c-fr-0008]
    8. Heating device (1) according to one of the preceding claims, characterized in that the set of connection bars (86) comprises:
    a first electrically conductive bar (86a) comprising a connection tab (860a) disposed within the electrical connector (85), at least one electrical connection (861a) with the printed circuit (83), and at least one connection tab ( 862a) intended for
    5 be connected to a heating module (4), a second electrically conductive bar (86b) comprising a connection tab (860b) disposed within the electrical connector (85) and at least one electrical connection (861b) with the printed circuit ( 83)
    10 at least a third electrically conductive bar (86c) intended to connect the printed circuit (83) with each heating module (4).
    [9" id="c-fr-0009]
    9. Heating device (1) according to the preceding claim, characterized in that the set of connection bars (86) is soldered on the printed circuit (83).
    [10" id="c-fr-0010]
    10. Heating device (1) according to one of the preceding claims, characterized in that the printed circuit (83) is arranged in a plane substantially perpendicular to the plane of the heating body (6).
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    WO2019138173A1|2019-07-18|
    FR3076973B1|2019-12-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1998406A1|2007-06-01|2008-12-03|Valeo Systèmes Thermiques|Electrical connection device between a power input source and an electric radiator, and method for manufacturing such a connection device|
    EP2226586A1|2009-03-03|2010-09-08|Valeo Systèmes Thermiques|Heating device, in particular for motor vehicle|
    FR2954606A1|2009-12-23|2011-06-24|Valeo Systemes Thermiques|ELECTRIC CIRCUIT BOARD CONNECTOR, ELECTRICAL CIRCUIT BOARD AND CORRESPONDING ELECTRICAL HEATING DEVICE|
    WO2012019854A1|2010-08-11|2012-02-16|Valeo Systemes Thermiques|Heater block for electric heating radiator|
    WO2014154579A1|2013-03-26|2014-10-02|Valeo Systemes Thermiques|Control module for an electric appliance|
    EP3883336A1|2020-03-20|2021-09-22|Mahle International GmbH|Heating arrangement|
    EP3927125A4|2020-06-18|2021-12-22|Mahle Int Gmbh|Control unit and electric heating device|
    法律状态:
    2019-01-30| PLFP| Fee payment|Year of fee payment: 2 |
    2019-07-19| PLSC| Publication of the preliminary search report|Effective date: 20190719 |
    2020-01-31| PLFP| Fee payment|Year of fee payment: 3 |
    2021-01-28| PLFP| Fee payment|Year of fee payment: 4 |
    2022-01-31| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1850306|2018-01-15|
    FR1850306A|FR3076973B1|2018-01-15|2018-01-15|ELECTRIC HEATING DEVICE|FR1850306A| FR3076973B1|2018-01-15|2018-01-15|ELECTRIC HEATING DEVICE|
    PCT/FR2019/050009| WO2019138173A1|2018-01-15|2019-01-04|Electric heating device|
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