WO2016128421A1

WO2016128421A1 - Housing of an electric heating device

Info

Publication number: WO2016128421A1
Application number: PCT/EP2016/052761
Authority: WO
Inventors: Frédéric PIERRON; Serif KARAASLAN; Philippe KERG
Original assignee: Valeo Systemes Thermiques
Priority date: 2015-02-10
Filing date: 2016-02-10
Publication date: 2016-08-18
Also published as: FR3032390B1; FR3032390A1

Abstract

The invention relates to a housing of an additional electric heating device intended for reheating an air flow passing through a ventilation, heating and/or air-conditioning system of a motor vehicle, the housing being suitable for holding at least one heating module, and the housing comprising a heating compartment into which at least one heating module can be inserted and a first connection interface (10) which makes it possible to connect the at least one heating module to a vehicle power supply, characterized in that the heating compartment is made of at least two distinct parts (6, 8) that define at least one recessed portion into which the at least one heating module can be inserted, in which event a first part (6) of the heating compartment is connected to the first connection interface (10), and in that the housing further comprises at least one bar (14) mounted on both parts (6, 8) of the heating compartment.

Description

HOUSING OF AN ELECTRIC HEATING DEVICE

The invention relates to the field of ventilation, heating and / or air conditioning of a motor vehicle. It relates to additional heating devices intended to be mounted in a ventilation system, heating and / or air conditioning of a motor vehicle.

More particularly, the invention relates to an additional heating device comprising heating elements with electrical resistances, for example positive temperature coefficient (PTC) resistors, which make it possible to produce heat rapidly in the vehicles, especially when wants to quickly warm up the cabin.

Heating devices of this type comprise a heating body comprising heat-exchanging heat exchange elements associated with said heating elements. These additional heating devices also comprise connection means which allow the electrical connection of the resistors to a source electrical network on board the vehicle, for the power supply of the heating elements, and connection means which allow the mechanical fixing of the device. additional heating to the ventilation, heating and / or air conditioning system.

In this context, the invention aims to provide an alternative to known embodiments of additional heating devices, which is at least as effective, for less cost and simplified assembly.

The invention relates to a housing of an additional electric type heating device for heating an air flow passing through a ventilation system, heating and / or air conditioning of a motor vehicle, the housing is able to carry to least one heating module, said housing comprising a heating compartment in which at least one heating module can be inserted and a first connection interface which allows the connection of the at least one heating module to a power supply of the vehicle. According to the invention, the heating compartment is formed of at least two distinct parts which define at least one housing in which said at least one heating module can be inserted, a first part of the heating compartment then being connected to the first connection interface, and in that the housing further comprises at least one bar inserted on each of the parts of the heating compartment.

The bar has the effect of stiffening the entire heating compartment formed in two parts, and to ensure the desired longitudinal separation between these two parts. It is understood that such a design has an advantage of modularity at lower cost, since one can achieve heating compartments of different lengths with parts of the heating compartment, more complex to achieve, which can remain the same, and a bar, simple to make, whose length is adapted to guarantee the desired spacing. For this purpose, it may be interesting in a complementary feature that the bar is also reported on the first connection interface. According to one possible characteristic, each part of the heating compartment comprises at least one insertion side of the at least one heating module, this at least insertion side having at least one opening, the first part of the heating compartment and the second part of the heating compartment are arranged so that said sides are facing one another. Preferably, the insertion sides extend to the distal longitudinal end of each of the parts.

According to a possible characteristic, the heating compartment is made of several different materials, the bar being able to be made of a material different from the material in which are made one and / or the other parts of the heating compartment. This optimizes the cost and weight of the heating device as a whole, by adapting the materials used to the functionality of the parts of the device. Thus, it can be expected that at least two of the two parts of the heating compartment and the bar are made of different materials, or that the bar is made of material with the at least one of the parts of the heating compartment and / or the first connection interface.

According to one possible feature, the bar has orifices. This avoids the disturbances of the air flow in the duct through which the heating device is housed, and optimizes the pressure drop of the bar and the heating of the air passing in particular in these orifices, which extend preferably perpendicular to the first side wall. It can be provided that these orifices take the form of grooves.

The housing of the electric airflow heating device according to the invention may further comprise one or more of the following characteristics, alone or in combination:

the at least one heating module extends, when it is arranged in the heating compartment, in a direction of general extension between a first end and a second end; the direction of general extension of said at least one heating module is substantially longitudinal;

the heating compartment extends in a direction of general extension between a first and a second end;

the general extension direction of the heating compartment is substantially longitudinal;

- At least a portion of at least one side of the heating compartment is recessed or openwork;

the at least one heating module comprises at least one element capable of producing heat and at least one associated element capable of exchanging heat with the flow of air passing through the heating block;

the at least one heating module is capable of producing and diffusing heat under the effect of an electric potential; said at least one element capable of producing heat is a resistive element;

said at least one element capable of producing heat is a positive temperature coefficient (PTC) type resistive element;

said at least one element capable of generating heat is a positive temperature coefficient (PTC) resistive element disposed in or on a support such as a bar;

said at least one element capable of producing heat is a resistive element placed between two electrodes;

said at least one associated element which is capable of exchanging heat is a radiant element or a heat sink;

said at least one heat-exchanging associated element is at least one fin traversed by at least one element capable of producing heat, or interleaves such as pleated or corrugated metal ribbons arranged between elements capable of producing heat ; said at least one element capable of generating heat is disposed between two elements able to exchange heat;

the at least one heating module comprises an element capable of producing heat disposed between two elements capable of exchanging heat;

the at least one heating module comprises two elements capable of producing heat and three elements capable of exchanging heat, a heat exchangeable element being disposed between two elements capable of producing heat, each of these elements heat generating means being disposed between the central heat exchangeable member and an external heat exchangeable member; - The first connection interface extends transversely to the heating compartment. According to different features of the invention, taken alone or combination:

at least the first part of the heating compartment comprises lateral walls, substantially perpendicular to a first plate of the first connection interface, as well as an intermediate wall, substantially parallel to the side walls and disposed inside the heating compartment; between said side walls, the heating compartment defining two separate housings for one or more heating modules, between a first side wall, the first connection interface and the intermediate wall on the one hand and between a second side wall, the first interface of connection and said intermediate wall on the other hand, said at least one bar being secured to one of the side walls;

the intermediate wall is off-center so that it is closer to the first lateral wall and a first housing defined between the first lateral wall, the first connection interface and the intermediate wall has a height between the intermediate wall and the first side wall less than the height between the second side wall and the intermediate wall of a second housing defined between the second side wall, the first connection interface and said intermediate wall, and the bar is integral with the first side wall; at least the first connection interface and / or one of the side walls of the first part of the heating compartment carries means for fixing the bar;

said fixing means comprise at least one pair of lugs arranged in vertical projection of a frame of the insertion face of the heating module disposed at the distal longitudinal end of the first part of the heating compartment;

said fixing means comprise at least two fixing studs arranged in longitudinal projection of the internal face of the first plate of the first connection interface. According to a characteristic of the invention, the housing may comprise a second connection interface, directly connected to the second part of the heating compartment, at a longitudinal end of the housing opposite to the end at which the first connection interface is arranged. According to one possible characteristic, the second connection interface comprises a second plate formed of a solid wall arranged transversely to the second part of the heating compartment, said solid wall carrying indexing means for placing the housing in position in the conduit. ventilation, heating and / or air conditioning system. According to a possible characteristic, the strip is then advantageously also reported on the second connection interface.

According to a possible characteristic, the second connection interface and one of the side walls of the second part of the heating compartment carries means for fixing the bar. According to a possible characteristic, said fixing means may comprise at least one pair of lugs arranged in vertical projection of a frame of the insertion face of the heating module disposed at the distal longitudinal end of the second part of the heating compartment. .

According to a possible characteristic, said fixing means comprise at least two fixing studs arranged in longitudinal projection of the internal face of the second plate of the first connection interface.

The invention also relates to a heating device which comprises a housing as described above and at least one heating module housed in the heating compartment of the housing, and a ventilation, heating and / or air conditioning installation of a motor vehicle comprising a such a heater.

Other features and advantages of the present invention will emerge more clearly from the description and the drawings, among which: - Figure 1 is a perspective view, three quarter rear, an additional heating device adapted to be housed across an air duct of a ventilation assembly, heating and / or air conditioning, said device being shown here without associated heating modules; FIG. 2 is a side view of the additional heating device of FIG. 1, in which the heating modules are shown diagrammatically;

- Figure 3 is a perspective view, three quarters rear, of a first portion of the additional heating device illustrated in Figure 1; and FIG. 4 is a perspective view, three quarters before this time, of a second part of the additional heating device illustrated in FIG. 1.

In the description which follows, reference will be made to an orientation function of the Longitudinal, Vertical and Transversal axes as arbitrarily defined by the trihedron L, V, T shown in the figures. The choice of designations of these axes is not limiting of the orientation that can take the device in its application to a motor vehicle, and the use of terms such as "superior" and "lower" is chosen according to the orientation in the illustration accompanying this description without it being either limiting. Referring to Figures 1 to 4 to describe an additional electric heating device adapted to be housed across an air duct of a ventilation system, heating and / or air conditioning, so as to transform the electrical energy taken from the vehicle in thermal energy returned to the air passing through said ventilation, heating and / or air conditioning system. The heating-ventilation and air conditioning installation is not shown here, but it will be understood that a main duct of this installation conventionally comprises an opening made in the wall for the insertion of the additional heating device. The additional heating device according to the invention comprises a housing and heating modules 4 (visible in FIG. 2) capable of transforming an electric current into thermal energy. We can refer to the patent document FR2895204 for the more detailed description of the heating modules and an embodiment with the presence of heat sinks enclosed by electrodes on either side of one or more stones with positive temperature coefficient (effect CTP).

According to the invention, the housing of the additional heating device 2 is formed by a heating compartment for receiving the heating modules 4 formed in two parts 6 and 8, a first connection interface 10, for connecting the device to a network electric vehicle and the power of the heating modules 4, which carries a first portion 6 of the heating compartment, a second interface 12, including mechanical fixing, which is adapted to cooperate with a wall of the duct of the ventilation system, heating and / or air conditioning, and which carries a second portion 8 of the heating compartment, and a bar 14 which extends longitudinally between the two connection interfaces 10, 12.

Each portion 6 and 8 of the heating compartment has substantially the same rectangular parallelepiped shape whose two main faces are perforated to allow diffusion in the duct of the heat released by the heating modules 4, one end of which is housed inside the part of the heating compartment. The connection interfaces 10 and 12 each carry a part of the heating compartment so that the positioning of the interfaces 10, 12 facing each other makes it possible to form a complete heating compartment for receiving the heating modules 4. Advantageously , the parts of the heating compartment 6 and 8 are integral with the corresponding connection interface 10 and 12, even if it is conceivable without departing from the context of the invention that one and / or the other of these parts of the heating compartment are made separately interfaces 10, 12 corresponding and reported and fixed, particularly by welding, on the interfaces 10, 12. Each part of the heating compartment 6 and 8 has three walls which extend longitudinally, parallel to each other, and among which there are two side walls 1 6, 18 and an intermediate wall 20 disposed between these side walls. One can distinguish a first side wall, said upper, 1 6 and a second side wall, said lower, 18, the first so-called upper side wall 1 6 being the supporting side wall of the bar 14, which extends in vertical extension of its outer face 21, that is to say the side facing the outside of the heating compartment, and substantially in the center thereof. The second lower lateral wall 18 has on its outer face, facing away from the heating compartment, a longitudinal stiffening groove 22, which extends over the entire length of the wall and which is connected to the interface of FIG. connection.

At a proximal longitudinal end 24 (referenced in FIG. 2) of these walls, the corresponding connection interface 10 and 12 form a solid face, while at the opposite distal longitudinal end 26, the face has a defined open shape. by a frame formed by two vertical uprights 28 which extend over the entire height of the heating compartment, from one side wall to the other, an upper bar 30 extending to the distal longitudinal end of the upper side wall 16 and a lower bar 32 extending at the distal longitudinal end of the lower side wall 18. The upper bar 30 of the frame carries means for fixing the bar 14.

It is understood that for each part of the heating compartment 6 and 8, the solid face formed by the connection interface 10 and 12 is a stop face for the introduction of the heating modules 4 in the heating compartment, these heating modules 4 being inserted, at the distal longitudinal end opposite, by an insertion face delimited by the frame.

In the illustrated embodiment, in each part of the heating compartment, the intermediate wall 20 is off-center in the vertical direction so that it is closer to the first so-called upper side wall 1 6. Two separate housings are thus defined in each part of the heating compartment. A first housing 34 is defined by the first so-called upper lateral wall 1 6, the connection interface 10 or 12 and the intermediate wall 20, while a second housing 36 is defined by the second so-called lower side wall 18, the connection interface 10 or 12 and the intermediate wall 20.

As a result, as seen in each of the figures, the first housing 34 has dimensions smaller than those of the second housing 36. The first housing 34 is sized to receive a first heating module 38 having two heat sinks, while the second housing 36 is sized to receive a second heating module 40 carrying three heat sinks.

The heating modules are thus reported in each part of the heating compartment, one stacked on the other, so as to form several distinct groups of the heating modules, a first heating module having a heat sink less than the second heating module. Here a first heating module 38 has two heat sinks while a second heating module 40 has three. Each of the longitudinal walls has guide flanges 42

(Visible in Figure 3) which extend in vertical projection, partially along the corresponding wall, on each transverse side thereof, to facilitate the translational guidance of the heating modules in the housing defined in the compartment parts. heating. As just described, it is observed that the bar 14 is secured to the first upper side wall 1 6, corresponding to the housing of the first heating module having fewer heat sinks. This bar 14 is thus substituted for the missing heat sink relative to the heating module having a greater number of heat sinks. In this way, the heat dissipation is substantially homogeneous on both sides of the intermediate wall 20.

The bar 14, as has been mentioned before, has orifices and is advantageously grooved. In particular, the bar 14 may have a series of vertical grooves 44, regularly spaced from each other since one longitudinal end of the bar 14 to the other, and perpendicular to the upper side wall 1 6.

The strip 14 extends longitudinally from a connection interface 10 to the other 12, in vertical extension of the upper side walls 1 6 of each part of the heating compartment 6 and 8, and substantially in the center of these side walls 1 6 18. The bar 14 has a small thickness relative to the transverse dimension of the side wall. It will be understood that the strip 14 here plays a dual role of heat dissipation and optimization of the heating performance of the device on the one hand, and mechanical strength of the entire additional heating device 2 on the other hand. The strip 14 is attached for this purpose on each upper side wall 1 6 and on each connection interface 10 or 12, and it will be understood that the strip 14 may be made independently and then welded or glued for example on these elements of the device. additional heating 2, or that it may be integral with one or the other of the connection interfaces 10, 12 and parts of the corresponding heating compartment.

It is understood that the advantage of making distinctly the parts that are the bar 14 and the two parts 6, 8 of the heating compartment is to offer greater modularity to adapt more easily to the demands of motor vehicle manufacturers. It is possible to play on the length of the bar 14 and on the type of material used.

The longitudinal dimension of the bar 14 can thus vary according to the desired space requirement of the heating device 2 and the longitudinal gap provided between the connection interfaces 10 and 12, it being understood that the ends of the strips 14 advantageously remain in contact with each other. connection interfaces 10, 12 to ensure greater rigidity of the assembly.

The material used to make the strip 14 may thus be different from those used to make one and / or the other parts of the heating compartment and the connection interfaces 10, 12. For example, the strip 14 , and the two parts 6, 8 of the heating compartment (and the connection interfaces corresponding) can be made all plastic, but with different materials. The first connection interface 10 and the first part 6 of the heating compartment can thus be made of a thermoplastic such as polybutylene terephthalate (PBT), the second connection interface 12 and the second part 8 of the heating compartment, brought to accommodating in the duct of the ventilation system, heating and / or air conditioning may advantageously be made of polyamide (PA), while the bar 14 is advantageously made of polypropylene (PP), easily recyclable and rigid enough to ensure the function of holding the entire bar 14. In Figure 3, there is illustrated a detail of the heating device according to the invention, with the first part 6 of the heating compartment and the corresponding first connection interface 10.

The first connection interface 10 has a dual function, namely an electrical connection function to allow the connection of the heating modules to a source of electrical energy on board the vehicle and a mechanical function to seal the opening of the conduit. of the ventilation, heating and / or air conditioning system by which the heating device is inserted.

The first connection interface 10 comprises a first plate 46 substantially flat, and a sleeve 48 which extends longitudinally projecting from the plate. The first plate 46 extends perpendicular to the longitudinal walls of the portion of the heating compartment that it supports, the longitudinal walls extending an inner face of the plate 46 while the sleeve 48 extends from the outer face of the plate 46 , opposite the heating compartment of the additional heating device.

The mechanical fixing means associated with the first connection interface 10 are carried by the first plate 46 which has at its vertical ends 50 fixing lugs 52 in which fixing holes 54 allow the cooperation of screwing means with threaded means. , here not shown, integral with the duct of the ventilation system, heating and / or air conditioning for the mechanical attachment of the additional heating device 2 relative to this duct. Furthermore, the first plate 46 has on its inner face 56, facing the heating compartment, a peripheral groove 58 (visible in Figure 2) in which a seal can be positioned to ensure airtightness between the interior of the duct of the ventilation system, heating and / or air conditioning where extends the heating compartment of the device and the outside of this duct where extends the first plate 46 and in particular the sleeve 48.

The first interface 10 has slots 60 which extend from the inner face 56 of the first plate 46 to the outer face 62 carrying the sleeve 48. The slots 60 open into the sleeve 48, the dimensions of which are suitable for allow reception in this sleeve 48 of electrical connection means, not shown here, directly connected to the vehicle network. These connection means cooperate with the electrodes of the heating modules, it being understood that one can provide electrical connection terminals made integral with the electrodes to extend and allow the passage of the assembly through the slots 60 to access the means of electrical connection of the vehicle. These slots 60 extend longitudinally and have a section defined to receive and guide through the first interface 10 the electrodes and / or the connection terminals, so that they can extend into the sleeve 48 projecting from the face external of the first plate 46.

The first interface 10 and the upper side wall of the first part 6 of the heating compartment carry means for fixing the bar 14. In FIG. 1, the cooperation of the bar 14 can be seen with these fixing means, while that Figure 3 makes more visible the realization of said fixing means.

The fixing means comprise a pair of lugs 64 arranged in vertical projection of the upper bar 30 of the frame at the distal longitudinal end 26 of the first part of the heating compartment 6, as well as four fixing studs 66, forming each a right angle, arranged in longitudinal projection of the inner face 56 of the first plate 46. The four fixing studs 66 are arranged with respect to each other so that one end of the bar 14 is housed between these pads (as can be seen in Figure 1). It is possible to provide a welding operation of the bar 14 against the first interface 10 when the bar 14 is correctly held in position by the fixing studs 66, or it may be possible to adjust the initial position of the fixing studs 66 so that the mounting of the bar 14 is done by a press fit. The fixing lugs 64 each comprise a base 68 extending the top bar 30 of the frame, these bases 68 being spaced apart from one another transversely to define an adjusted housing for the bar 14, and they each further comprise a retaining finger 70 which overhangs the base 68 and the fitted housing for the bar 14, and which tends to approach the other finger to create a decrease in the passage section between the lugs 64. The bar 14 is pushed vertically to force to spread the fingers 70 before taking up position in the housing, and the fingers 70 return to their original position by engaging in one of the grooves 44 of the bar 14, thereby immobilizing the bar 14 vertically.

In Figure 4, there is illustrated a detail of the device according to the invention, with the second part of the heating compartment 8 and the second connecting interface 12 corresponding. The second interface 12 comprises a second plate 72 which extends perpendicularly to the longitudinal walls of the part of the heating compartment that it supports, and substantially parallel to the first plate 46 of the first connection interface 10.

In a manner similar to that described for the first connection interface 10 and the part of the associated heating compartment, means for fixing the bar 14 are provided on the upper bar 30 of the frame at the same location. distal longitudinal end of the portion of the heating compartment that on the inner face of the second plate 72 of the second connection interface 12.

The inner face 74 of the second plate 72, that is to say the face which carries the longitudinal walls of the second part 8 of the heating compartment, presents thrust pads 76, in number equal to the number of heating modules present in the additional heating device 2.

The second plate 72 has a solid shape and has on its outer face 78 a rib 80 which extends vertically substantially in the center of the second plate 72.

Furthermore, the second portion 8 of the heating compartment differs from the first part 6 previously described in that it comprises elastic return retaining tabs 82, borne by the vertical uprights 28 of the frame, and which extend to the inside of the housings defined in this second part of the heating compartment 8 on either side of the intermediate wall 20. These tabs 82 allow the longitudinal retention of the heating modules 4 (as can be seen in FIG. 2), it being understood that maintaining the longitudinal position relative to the first interface 10 is done by inserting the electrodes in the slots 60 and their electrical connection, and that maintaining the longitudinal position of the connection interfaces 1 and 12 between they are done by the presence of the stiffening bar 14. The presence of the retaining tabs 82 allows in particular to avoid that there are too many constraints on the ba rrette 14 or on the electrical connection at the first interface 10.

The second plate 72 of the second connection interface 12 is extended at one of its vertical ends by means of guiding shapes complementary to those of a guide means integral with the conduit. In the example illustrated, the guide means carried by the second interface 12 consist of a gripper 84 of internal diameter substantially equal to the outer diameter of a guide rail (not visible in the figures) integral with the duct and extending the along the location that must take the additional heater 2 in the conduit.

We will now describe the mounting of the additional heating device 2, monobloc according to the invention. Each group of two or three heating modules 38, 40 is inserted into the appropriate housings inside the first part of the heating compartment 6 and then into the appropriate housings inside the housing. second part of the heating compartment 6. We can prioritize the initial placement of the heating modules 4 in the second part of the heating compartment 8 so that they are held in position by the retaining lugs carried by this second part of the compartment of heater 8, it being understood that the mounting of the heating modules 4 between these holding tabs can generate stresses that could cause damage if the electrodes are engaged in the slots of the first interface 10 at this precise moment.

Thus, the heating modules 4 are first inserted by the insertion face at the distal end 26 of the second part of the heating compartment 8, by first inserting the side of the heating modules 4 opposite the carrier side of the heating elements. free ends of the electrodes, and sliding the heating modules 4 in translation until they abut against the second connection interface 12 and the stop pads 76 carried by the second plate 72. The retaining tabs 82 are separated from each other by the passage of the heating modules 4, and the elastic force of return in position of these retaining tabs 82 tends to grip and hold in position the heating modules 4 in the second part of the heating compartment 8.

In the case where the strip 14 is made independently of the connection interfaces 10 and 12, the strip 14 is then mounted with respect to one or the other of the interfaces and the part of the corresponding heating compartment. . In the example described, the bar 14 is mounted at one end against the second interface 12, by inserting one end of the bar 14 between the fixing studs 66 carried by the second plate 72, and by clipping an edge of the bar 14 in the attachment pins 64 carried by the frame. The heating modules 4 are then inserted by the insertion face at the distal end 26 of the first part of the heating compartment 6, the electrodes or the connection terminals first, and the heating modules 4 are slid in translation towards the first connection interface 10. The heating modules 4 are guided transversely by the presence of the guide flanges 42. In this translation of the two parts 6, 8 of the heating compartment towards each other, the bar 14 slides so that at its end free moves towards the first plate 46 of the first interface 10, after being slid into the housing defined between the attachment pins 64 carried by the frame of the insertion face of the first portion 6 of the heating compartment 6. At the end of insertion, the free end of the electrodes or terminals enters the slot 60 associated therewith so as to emerge on the other side of the first connection interface 10, inside the sheath. And the free end of the bar 14 is engaged between the fixing studs 66 carried by the first plate 46.

The additional heating device 2 is then inserted into a conduit of the ventilation system, heating and / or air conditioning, by initial insertion of the second connection interface 12 into an opening made in this conduit. The guide means 84 carried by the second connection interface 12 are made to cooperate with complementary guiding means carried by the conduit, in order to bring the second connection interface 12 and the first connection interface 10 respectively against fixing means carried by the conduit. The first connection interface 10 is secured to the conduit of the ventilation system, heating and / or air conditioning by screwing, while the second connection interface 12 is pressed against the wall of the conduit, locked in position by indexing lugs arranged projecting from this wall. It may be envisaged that the wall of the duct against which the second connection interface 12 is plated carries means complementary to the rib extending over the height of the external face of the second plate 72, to allow mounting of the additional heating device. 2 in the duct by interlocking with the force of the second connection interface 12. In all cases, it is noteworthy that the second connection interface 12 makes it possible, on the one hand, to hold the heating modules 4 in the additional heating device 2 and on the other hand the positioning of the additional heating device 2 in the duct of the installation.

The terminals are then connected to the vehicle's electrical network. The control management of the additional heating device 2 is, in the illustrated case, located elsewhere on the vehicle, for example in a computer cockpit electronics. However, one could consider integrating a control module into the first connection interface 10.

The foregoing description clearly explains how the invention makes it possible to achieve the objectives it has set itself, and in particular to propose a heating assembly in which an electric type heating device is disposed across a duct. a ventilation system, heating and / or air conditioning of a motor vehicle, to allow the diffusion of heat by electrical excitation of the heating modules carried by or housed in a housing of an additional heating device. The fact that this housing is made in two separate parts, each secured to a connection interface allows a high modularity of realization of the entire housing, that is to say the heating compartment and the interface or interfaces of connection, which can be made distinctly in one or another material, whether metal or plastic, loaded or not. We can thus give each piece the rigidity and lightness appropriate to their function in the device. Moreover, it is easy, because of the modular design of the housing, to play on the length of the bar to adapt to the different demands of motor vehicle manufacturers as to the size of the additional heating device to provide. The connection interfaces can remain the same, and the bar is easily shortened or enlarged to fit the desired gap between these interfaces.

Claims

1. Housing of an additional electric type heating device for heating a flow of air passing through a ventilation, heating and / or air conditioning of a motor vehicle, the housing is able to carry at least one heating module (4; 38, 40), said housing having a heating compartment in which at least one heating module (4; 38; 40) can be inserted and a first connection interface (10) which allows the connection of the at least one heating module (4). 38, 40) to a power supply of the vehicle, characterized in that the heating compartment is formed by at least two distinct parts (6, 8) which define at least one housing in which said at least one heating module can be inserted ( 4, 38, 40), a first portion (6) of the heating compartment being then connected to the first connection interface (10), and in that the housing further comprises at least one bar (14) attached to each one of the parts (6, 8) of the heating compartment.

2. housing of a heating device according to claim 1, characterized in that each portion (6, 8) of the heating compartment comprises at least one insertion side of the at least one heating module (4; 38, 40). this at least insertion side having at least one opening, the first part (6) of the heating compartment and the second part (8) of the heating compartment are arranged so that the said sides are facing one another. the other.

Housing of a heating device according to one of claims 1 or

2, characterized in that at least two of the two parts of the heating compartment (6, 8) and the bar (14) are made of different materials.

4. housing of a heating device according to one of claims 1 to

3, characterized in that the bar (14) is also attached to the first connection interface (10).

5. Housing of a heating device according to one of the preceding claims, characterized in that the bar (14) has orifices.

6. housing of a heating device according to one of the preceding claims, characterized in that the bar (14) is integral with at least one of the parts of the heating compartment (6, 8) and / or the first connection interface (10).

7. Housing of a heating device according to one of the preceding claims, characterized in that at least the first part of the heating compartment (6) has side walls (1 6, 18), substantially perpendicular to a first platen (46) of the first connection interface (10), and an intermediate wall (20), substantially parallel to the side walls and disposed inside the heating compartment between said side walls, the heating compartment defining two separate housings (34, 36) for one or more heating modules, between a first side wall (1 6), the first connection interface (10) and the intermediate wall (20) on the one hand and between a second side wall ( 18), the first connection interface (10) and said intermediate wall (20) on the other hand, said at least one bar (14) being integral with the outer face (21) of one of the side walls (1 6). .

Housing of a heating device according to one of the preceding claims, characterized in that the intermediate wall (20) is off-center so that it is closer to the first side wall (1 6) and a first housing (34) defined between the first side wall (16), the first connecting interface (10) and the intermediate wall (20) has a height between the intermediate wall and the first side wall less than the height between the second wall lateral portion (18) and the intermediate wall (20) of a second housing (36) defined between the second side wall (18), the first connection interface (10) and the said intermediate wall (20), and characterized in that the bar (14) is integral with the first side wall (1 6).

9. Housing of a heating device according to one of the preceding claims, characterized in that at least the first connection interface (10) and / or one of the side walls (1 6, 18) of the first part of the heating compartment (6) carries means for fixing the bar (64, 66).

10. Housing of a heating device according to claim 9, characterized in that said fixing means comprise at least one pair of lugs (64) arranged in vertical projection of a frame of the insertion face of the heating module. disposed at the distal longitudinal end (26) of the first part of the heating compartment (6).

1 1. Housing of a heating device according to one of claims 8 or

10, characterized in that said fixing means comprise at least two fixing studs (66) arranged in longitudinal projection of the internal face (56) of the first plate (46) of the first connection interface (10).

Housing of a heating device according to one of the preceding claims, characterized in that the housing comprises a second connection interface (12) directly connected to the second part of the heating compartment (8) at one end. longitudinal direction of the housing opposite the end at which the first connection interface (10) is arranged.

13. housing of a heating device according to the preceding claim, characterized in that the second connection interface (12) comprises a second plate (72) formed of a solid wall disposed transversely to the second part of the heating compartment ( 8), said solid wall carrying indexing means (80) for positioning the housing in the duct of the ventilation, heating and / or air conditioning system.

14. housing of a heating device according to one of claims 12 or 13, characterized in that the bar (14) is also reported on the second connection interface (12).

Housing of a heating device according to one of claims 12 to 14, characterized in that the second connection interface (12) and one of the side walls (1 6, 18) of the second part of the heating compartment (8) carries means for fixing the bar (14).

16. housing of a heating device according to claim 15, characterized in that said fixing means comprise at least one pair of lugs (64) arranged in vertical projection of a frame of the insertion face of the heating module disposed at the distal longitudinal end (26) of the second part of the heating compartment (8).

17. Housing of a heating device according to one of claims 15 or 1 6, characterized in that said fixing means comprise at least two fixing studs (66) arranged in longitudinal projection of the inner face (74) of the second stage (72) of the first connection interface (12).

Heating device in which a heating body comprises a housing according to one of the preceding claims and at least one heating module (4) housed in the heating compartment of the housing.

19. Installation for ventilation, heating and / or air conditioning of a motor vehicle, comprising at least one heating device according to claim 18.