CN211844025U

CN211844025U - Heating assembly and motor vehicle

Info

Publication number: CN211844025U
Application number: CN201890000765.7U
Authority: CN
Inventors: D.内弗; L.泰利耶; J.古尔; L.里德
Original assignee: Valeo Systemes Thermiques SAS
Current assignee: Valeo Systemes Thermiques SAS
Priority date: 2017-04-26
Filing date: 2018-04-17
Publication date: 2020-11-03
Anticipated expiration: 2028-04-17
Also published as: FR3065672A1; WO2018197779A1; FR3065672B1; EP3615361A1

Abstract

The utility model relates to a heating element (10) and motor vehicle, heating element (10) include: a radiation panel (1) configured to emit at least infrared radiation (3); and at least one reflective element (2), the reflective element (2) having an infrared reflectivity, the reflective element (2) being positioned facing the radiation panel (1) so as to produce at least one reflection of said radiation (3).

Description

Heating assembly and motor vehicle

Technical Field

The field of the utility model is the field of heating element and motor vehicles.

Background

Typically, the radiant panel is heated by emitting radiation. The advantage of this heating by emitting radiation is that less fluctuations and temperature gradients are experienced than with hot air heating, while being quieter than it is. The use of a radiant panel also allows to achieve the same thermal comfort as that obtained by heating with hot air, while the temperature of the air delivered inside the passenger compartment is lower than that achieved by heating with hot air, and this can be done more quickly. Thus, the electrical consumption dedicated to heating the vehicle passenger compartment can be reduced by exclusively using the radiant panel or indeed by using the radiant panel in combination with hot air heating.

However, the use of radiant panels has the disadvantage of producing uneven heating, for example, which produces hot spots on the walls delimiting the passenger compartment. Furthermore, it is not easy to integrate the radiant panel into the passenger compartment, in particular as regards its shape and dimensions. In particular, the radiant panel interferes with the layout of many other units, functions, constraints and passenger compartments, which hardly facilitates their integration.

SUMMERY OF THE UTILITY MODEL

It is therefore an object of the present invention to provide a heating assembly intended to be equipped for the passenger compartment of a vehicle, which allows a more uniform heating with radiant panels and a simpler and cheaper integration.

Accordingly, one subject of the present invention is a heating assembly intended to be installed in the passenger compartment of a vehicle, comprising:

-a radiation panel configured to emit at least one infrared emission, an

-at least one reflective element for reflecting light,

characterized in that one or more reflecting elements have a reflectivity in the infrared light, the one or more reflecting elements being positioned facing the radiation panel so as to produce at least one reflection of said infrared emission.

This arrangement of one or more reflective elements relative to the radiation panel allows for a multiple increase in the infrared radiation sources at a lower cost, which allows for better distribution of the infrared radiation and more uniform heating due to a reduced number of hot spots.

In addition, the presence of one or more reflective elements is easier and cheaper to implement than the presence of an additional radiating panel. In particular, the radiating panel may have an emission area that is smaller than that of the radiating panels of the prior art, while providing the same level of thermal comfort. Furthermore, the mounting of the reflective element is easier, since the element can conform to the shape of the carrier adjacent to the radiation panel.

Thus, spreading the infrared radiation source allows a larger radiation area to be covered while limiting the maximum temperature of the radiation panel. Thus, the power consumption of the heating assembly is controlled and kept lower than the power consumption of the prior art radiant panel.

It will be recalled that a vehicle passenger compartment is defined as the portion of the vehicle in which a vehicle user, such as a driver and passengers, is seated.

It should be noted that placing the radiation panel facing the at least one reflective element means that the emission emitted by the radiation panel is at least partially directly received by the one or more reflective elements. "facing" may also be defined by the presence of at least one viewing angle factor between each given reflective element and the radiating panel. In other words, positioning the radiating panel facing the at least one reflective element allows at least some of the infrared radiation emitted by the radiating panel to reach the reflective element without passing through any intermediate elements along its path.

According to one or more features, which can be implemented individually or in combination, it can be provided that:

-the reflectivity of the one or more reflective elements in infrared light is higher than 70%.

-said reflection is configured to heat an area of the passenger compartment.

The radiation panel emits emissions in the visible in addition to infrared emissions. The visible light emission has a wavelength between 400nm and 800 nm.

The radiation panel emits thermal emissions in addition to the infrared emissions. The wavelength of the thermal emission is between 100nm and 100000 nm.

The radiating panel emits only infrared emissions. The infrared emission has a wavelength between 750nm and 1000 nm.

At least one part of the infrared emission and optionally of the thermal and/or visible emission emitted by the radiant panel is directed directly towards the area to be heated, at least another part of the infrared emission and optionally of the thermal and/or visible emission being reflected by one or more reflective elements in the direction of the passenger cabin area to be heated.

The entire infrared emission emitted by the radiant panel is reflected by the one or more reflective elements in the direction of the passenger compartment area to be heated.

-the radiating panel is positioned facing the one or more reflective elements such that the viewing angle factor between the radiating panel and the reflective elements or between the radiating panel and each reflective element is greater than 5%. The view factor (also referred to as the form factor) of a first region transmitting emissions towards a second region receiving the emissions corresponds to the proportion of emissions transmitted by the first region captured by the second region. The proportion of the emitted emission is typically expressed in percentage. The emission captured by the second region may then be transmitted, for example by passing through the second region, absorbed, for example by heating the second region, or may actually be reflected by the second region. The form factor depends only on the geometric criteria. The measurement can be performed in two different ways, by geometric calculations, or by varying the temperature of the first region and measuring the effect on the heating of the second region.

-the viewing angle factor between the radiating panel and the reflective elements or between the radiating panel and each reflective element is greater than 20%.

-the viewing angle factor between the radiating panel and the reflective elements or between the radiating panel and each reflective element is less than 50%.

The radiating panel is remote from the one or more reflective elements. This means that the radiating panel is not in contact with a single reflective element or with a group of reflective elements (when there are multiple reflective elements).

The single radiating panel faces the single reflective element.

-a plurality of reflective elements facing the radiation panel. Thus, a single radiating panel faces a plurality of reflective elements.

The reflective element comprises a reflective area having an area smaller than the area of the emission area of the radiation panel. In the case of a plurality of reflective elements, the sum of the areas of the reflective regions is smaller than the area of the emission region of the radiation panel. Alternatively, the area of the reflective element is larger than the area of the emission area of the radiation panel. In the case of a plurality of reflective elements, the sum of the areas of the reflective regions is greater than the area of the emission region of the radiation panel.

The radiation panel comprises a rectangular emission area.

At least one of the reflective elements or all of the reflective elements comprises a rectangular reflective area. The rectangular shape has the advantage of being easy to manufacture on a production line.

The heating assembly further comprises a sun visor shade.

The sun visor shade incorporates a radiant panel or at least one reflective element.

-at least one reflective element is transparent at a wavelength between 400nm and 800 nm. Thus, the one or more reflective elements are transparent in visible light. In other words, the one or more reflective elements have a low emissivity in visible light. Thus, such a reflective element may be applied to a side window or windshield or rear window of a vehicle without obstructing the view of the user. Furthermore, such a reflective element also makes it possible to blend more discretely with the style of the passenger compartment.

-at least one reflective element (2) is reflective in visible light. Thus, the one or more reflective elements act like a mirror in visible light. The one or more reflective elements have a reflectivity of more than 70% not only in infrared light but also in visible light. The reflective element can thus be used as a cosmetic mirror.

Another subject of the present invention is a motor vehicle comprising a passenger compartment, characterized in that it comprises at least one heating assembly such as defined above, placed in the passenger compartment.

the radiant panel is located on the roof of the vehicle and the at least one reflective element is located on the shade of the sun visor.

One or more reflective elements are located on the inner face of the shade of the sun visor, facing the radiant panel.

In contrast, the radiant panel is located on the shade of the sun visor, while the one or more reflective elements are located on the roof of the vehicle.

The motor vehicle comprises pillars extending between the roof and the lower body structure of the vehicle, the radiating panel being located on at least one of the pillars and the at least one reflective element being located on at least a portion of the vehicle glazing element.

The glass element is a windshield, a rear window or a side window.

At least a portion of the glass element is adjacent to the pillar comprising the radiating panel.

The reflective element located on the glass element is transparent in the visible, i.e. at wavelengths between 400nm and 800 nm. Thus, the presence of the reflective element does not affect the line of sight of the vehicle user, while allowing the upper part of its body to be heated.

The reflective element occupies 1% to 15% of the glass element. More precisely, the reflective element extends along the border of the pillar and has a width of between 0.5cm and 10 cm.

The motor vehicle comprises at least one footwell, characterized in that the radiant panel is located on one of the walls forming the footwell and the at least one reflective element is located on one or more other walls forming the footwell.

The footwell is formed by at least five walls, including a wall forming the vehicle floor, a rear wall and at least three side walls.

The radiating panel is placed on the rear wall of the footwell, while the at least one reflective element is located on the at least one side wall.

Drawings

Other features, details and advantages of the invention will become apparent upon reading the description given with reference to the accompanying drawings, in which:

figure 1 is a schematic view of a heating assembly according to the invention,

fig. 2 is a schematic view of a portion of a passenger compartment of a motor vehicle, here a sun visor incorporating a heating assembly, according to a first exemplary embodiment of the invention,

figure 3 is a schematic view of a portion of a passenger compartment of a motor vehicle, here a pillar of the vehicle incorporating a heating assembly, according to a second exemplary embodiment of the invention, an

Figure 4 is a schematic view of a portion of a passenger compartment of a motor vehicle, here a footwell incorporating a heating assembly, according to a third exemplary embodiment of the invention.

Detailed Description

It should be noted at the outset that the drawings, which can of course be used to better define the invention where applicable, illustrate the invention in detail for the purpose of carrying out the invention.

Fig. 1 schematically shows a heating assembly 10 comprising a radiation panel 1 and a reflective element 2. The heating assembly 10 is intended to be installed in the passenger compartment of a vehicle, as described below.

The radiation panel 1 is configured to emit infrared emissions 3, i.e. the radiation panel 1 emits waves with a wavelength between 750 and 1000 nanometers (nm). Of course, the radiation panel 1 can emit thermal waves with a wavelength between 100nm and 100000nm in addition to infrared waves. More specifically, the radiant panel 1 can emit visible waves or even other types of waves between 400nm and 800nm, in addition to infrared waves. According to a variant embodiment, the radiating panel 1 emits only infrared emissions 3.

Ideally, the emission 3 emitted by the radiation panel 1 allows achieving a heating temperature comprised between 30 degrees celsius (° c) and 80 ℃. The heating temperature is measured while contacting the radiation panel 1. However, to avoid the risk of burns, the heating temperature is preferably lower than or equal to 60 ℃. Of course, the heating temperature is adjusted depending on the needs of the user.

It is to be noted that the radiation panel 1 comprises a radiation area from which the emission 3 is emitted. In the exemplary embodiments described below, the radiation area is rectangular. Of course, other shapes of the radiation area are possible, for example the radiation panel 1 may have a square or circular radiation area.

The reflective element 2 has a reflectivity in infrared light. The reflectivity is higher than or equal to 70% in infrared light. The reflectivity represents the ability of the reflecting element 2 to reflect waves, here infrared waves with a wavelength between 750nm and 1000 nm. A reflectivity of at least 70% means that at least seventy of one hundred incident rays are reflected by the reflective element 2. According to a variant embodiment, the reflectivity of the reflective element 2 at other wavelengths than infrared light is higher than or equal to 70%. According to an advantageous embodiment, the reflecting element 2 has a low emissivity in the visible, and is therefore transparent. The emissivity and reflectivity of a given area is related to the characteristics of the material forming the given area. It can also be said that the reflectance or reflectance corresponds to the proportion of light reflected by the panel surface.

The reflective element 2 comprises a reflective area, which is obtained, for example, by depositing a material that is reflective in infrared light in the form of a thin layer or particles. According to one embodiment, the material used is a metal such as aluminum. Since such deposition tends to change the visual appearance and optical characteristics of the reflective element 2, it is preferable to mount the reflective element 2 in a passenger compartment area that is less likely to disturb the user. According to an embodiment, the reflective element 2 takes the form of a reflective film, which will be able to be positioned on a carrier located in the passenger compartment facing the radiant panel 1.

According to exemplary embodiments described below, the reflective area is rectangular. Of course, other shapes of the reflective area are possible, for example the reflective element 2 may have a square or circular reflective area. According to a particular embodiment of the invention, the reflecting area of the reflecting element 2 is curved towards the radiation panel 1. In other words, the reflective element 2 is convex as seen from the radiation panel 1.

The radiation panel 1 and the reflective element 2 are placed such that at least a part of the emission 3 emitted by the radiation panel 1 is directly received by the reflective element 2 to be reflected. Directly means that the emission 3 emitted by the radiation panel 1 does not encounter other obstacles before reaching the reflecting element 2. In other words, the reflective element 2 is positioned facing the radiation panel 1 so as to produce at least one reflection of the emission 3 emitted by the radiation panel 1. It is noted that "facing" means that there is at least one view factor between the radiation panel 1 and the reflective element 2, as will be explained in detail below with reference to fig. 1.

The reflection of the emission 3 emitted from the zone S1 of the radiant panel 1 to the zone S2 of the reflective element 2 produces a reflected emission 4 intended to be directed towards at least one zone Z of the passenger compartment to be heated, as described below. The emission 3 emitted by the zone S1 of the radiant panel 1 can also be directed towards the zone Z of the passenger compartment to be heated. According to an embodiment, the whole emission emitted by the region S1 of the radiation panel 1 is reflected by the reflective element 2. It is to be noted that the emitted rays 3 and the reflected rays 4 schematically shown in fig. 1 coincide with the normal of the area S1 (also referred to as first area or radiation area) of the radiation panel 1 and the area S2 (also referred to as second area or reflection area) of the reflective element 2, respectively.

Depending on the installation of the heating assembly 10, the reflective element 2 may have a smaller reflection area S2 than the radiation area S1 of the radiation panel 1. In the case where a single radiation panel 1 has a plurality of reflection elements 2, the sum of reflection areas S2 of the reflection elements 2 positioned to face the radiation panel 1 is smaller than the radiation area S1 of the radiation panel 1. According to a variant embodiment, the reflecting element 2 may have a reflection area S2 greater than the radiation area S1 of the radiation panel 1, and in the case of a plurality of reflecting elements 2, the sum of the reflection areas S2 of the reflecting elements 2 positioned facing the radiation panel 1 is greater than the radiation area S1 of the radiation panel 1.

As shown in fig. 1, the center of the radiation panel 1 is located at a distance D from the center of the reflective element 2. The distance D may vary depending on the installation in the passenger compartment. It should be noted that the radiation panel 1 is far from the reflective element 2 in the sense that the radiation panel 1 is not in contact with the one or more reflective elements 2.

The emission 3 output from the center of the radiation panel 1 is emitted in all directions, at least a part of which is emitted towards the reflective element 2 and, optionally, another part of which is emitted towards the area to be heated. Then, the view factor (also referred to as form factor) between the radiation panel 1 and the reflective element 2 is defined by a calculation performed in the following way:

the first and second regions S1, S2 are decomposed into small regions dS1, dS2, so that the area of the small regions dS1, dS2 is negligible compared to the first region S1 and the second region S2, respectively. For example, the ratio S1/dS1 between the first region S1 and the first small region dS1 is greater than one thousand. The same is true for the ratio S2/dS2 between the second region S2 and the second small region dS 2.

Next, an angle θ 1 between the normal of the first small region dS1 and the normal of the second small region dS2 and an angle θ 2 between the normal of the second small region dS2 and the normal of the first small region dS1 are defined. Generally, the angles θ 1, θ 2 are different from each other. The distance D defined above also represents the distance between the first small region dS1 and the second small region dS 2.

The view angle factor (denoted as F) of the first region S1 relative to the second region S2 is expressed by the following equation, according to the law of regulating Lambertian emission:

it will therefore be appreciated that the viewing angle factor F will be non-zero when the region S2 of the reflective element 2 is relatively close to the radiating panel 1 and the angles θ 1, θ 2 are less than 90 degrees. According to an embodiment, the position of the reflective area S2 relative to the radiating area S1 of the radiating panel 1 is selected to achieve a viewing angle factor greater than or equal to 5%. Preferably, the viewing angle factor is less than or equal to 50%. The preferred viewing angle factor is between 20% and 50%.

This arrangement of the reflective elements 2 with respect to the radiation panel 1 allows to distribute the radiation sources, in particular the infrared light sources, at a lower cost, which allows to achieve a better coverage with infrared radiation, while improving its uniformity and avoiding the occurrence of hot spots. In addition, the presence of the reflective element 2 is easier to achieve than the presence of the additional radiation panel 1.

We will now describe the installation of the heating assembly 10 in the passenger compartment using a number of exemplary embodiments. It will be recalled that the passenger compartment is defined as the part of the vehicle in which users, such as drivers and passengers, are seated.

Fig. 2 shows a part of a passenger compartment 5, here a motor vehicle, which comprises a sun visor 6. The sun visor 6 comprises at least one hinge 61 and a shade 62 movable around the hinge 61. More precisely, the screen 62 is movable between a closed position, in which its inner face 63 is pressed against the roof 7 delimiting the passenger compartment 5, and an open position, in which its outer face 64 is closer to the windscreen of the vehicle.

In the closed position, the screen 62 defines on the roof 7 an area 8 facing the screen 62, which is indicated by a dashed line in the figure. More precisely, the area 8 facing the screen 62 corresponds to the projection of the screen 62 on the roof 7. Thus, the region 8 facing the shade 62 has the same features as the shade 62, such as shape, contour, and area.

In this first example of embodiment, the roof 7 incorporates the radiant panel 1 of the heating assembly 10. More precisely, the radiant panel 1 is entirely located in the area 8 facing the screen 62 as defined above. Thus, the radiating area 15 of the radiating panel 1 is smaller than or equal to the area of the area 8 facing the shield 62. According to a variant embodiment, the radiating area 15 of the radiating panel 1 is greater than the area 8 facing the shutter 62 and therefore greater than the area of the shutter 62. Of course, more than one radiant panel 1 can be provided on the roof 7 to occupy the area 8 facing the screen 62.

The shade 62 of the sun visor 6 here comprises a single reflective element 2 of the heating assembly 10, which is positioned facing the radiant panel 1. More precisely, the reflective element 2 is placed on the inner face 63 of the shutter 62. Of course, more than one reflective element 2 can be provided on the barrier 62. Thus, in the closed position, the radiation panel 1 and the reflective element 2 are positioned at least partially face to face. Advantageously, the reflective element 2 behaves like a mirror in visible light. In other words, the reflective element 2 is reflective in the visible, i.e. at wavelengths between 400nm and 800 nm. It should be noted that in this exemplary embodiment, the reflective area 25 of the reflective element 2 is larger than the radiation area 15 of the radiation panel 1.

As shown in fig. 2, the emission 3 emitted by the radiation panel 1 is reflected by the reflective element 2 as reflected rays 4, which reflected rays 4 are directed towards the area Z to be heated. More precisely, here the area to be heated Z corresponds to the seat top to heat the face and body top of the user sitting on this seat. Thus, when the radiant panel 1 is in operation, the user lowers the sun visor 6 to benefit from rays 4 reflected onto his face and the top of his body, which reflected rays 4 may be partially oriented depending on the position of the sun visor 6. In this exemplary embodiment, it is to be noted that the radiation panel 1 also participates directly in the heating of the region to be heated Z.

Of course, the positions of the radiation panel 1 and the one or more reflective elements 2 may be reversed. Thus, the radiation panel 1 is integrated into the inner face 63 of the screen 62, while the one or more reflective elements 2 are integrated into the vehicle roof 7. It is to be noted that the assembly formed by the radiant panel 1, the reflective element 2 and optionally the sun visor 6 may form a deliverable module fastened to the vehicle roof 7.

Fig. 3 shows another example of installation in the passenger cabin 5, which can replace the previous example or supplement it. This second exemplary embodiment shows the heating assembly 10 mounted in a pillar 9 of a vehicle, here a pillar of a windscreen 11 of a motor vehicle.

The radiation panel 1 of the heating assembly 10 is integrated into the pillar 9 and the plurality of reflective elements 2 of the heating assembly 10 are placed on a window, such as a windshield 11 or a side window 12, located bordering the pillar 9 comprising the radiation panel 1. Of course, a single reflective element 2 may be provided on one of the windows 11, 12 located bordering the pillar 9. All pillars 9 of the vehicle may be equipped with the heating assembly 10.

Each reflective area of the reflective element 2 is produced on a window, for example by a low emissivity reflective deposit of 0.5 to 10cm width bordering a pillar 9. More precisely, a width of 0.5 to 10cm is measured from the pillar 9 and perpendicular thereto. The reflective area forms a strip of, for example, 2cm width extending from the top to the bottom of the windscreen. By "bordering the pillar 9" is meant that the reflective area is adjacent to the pillar 9. Low emissivity reflective deposits have the advantage of being transparent in visible light and reflective in infrared light. The reflective element 2 is thus transparent and can be seen through by a user.

As shown in fig. 3, the emission 3 emitted by the radiation panel 1 is partially reflected by the reflective element 2 into reflected rays 4, which reflected rays 4 are directed towards the area Z to be heated. More precisely, here the area to be heated Z corresponds to the seat top to heat the top of the face and body of the user sitting on the seat. It should be noted that a part of the emitted emission 3 is directed directly towards the region Z to be heated. Thus, when the radiation panel 1 is in operation, the user benefits from the emitted emission 3 and the emission 4 reflected onto his face and the top of his body.

According to a variant (not shown), the radiant panel extends on the vehicle roof above the vehicle door, wherein the reflective element is located on the window of said door and has a width of 0.5 to 10cm, bordering the roof. More precisely, the radiating panel may extend parallel to the vehicle floor or perpendicular to the vehicle floor.

Fig. 4 shows another example of installation in the passenger cabin 5, which may replace or supplement at least one of the previously described installation examples. This third exemplary embodiment shows the installation of the heating assembly 10 in a footwell 13 of a vehicle, here a motor vehicle. The passenger cabin comprises at least two footwells 13, one of which is dedicated to the driver and the other to the passengers.

The plurality of reflective elements 2 of the heating assembly 10 are placed on the walls of the footwell 13 which are located bordering the walls in which the radiation panels 1 of the heating assembly 10 are integrated. More precisely, the footwell 13 is formed by a lateral wall 130 and at least one rear wall 140, the at least one rear wall 140 being located, for example, below the footboard 14 (when present), the lateral wall 130 bordering the rear wall 140. In the example shown in fig. 4, a second rear wall 140 has been shown, which functions as a footrest. Bordering the back wall 140 means that at least one of the side walls 130 and the back wall 140 forms an edge. In the example shown, the footwell 13 comprises six walls, of which two rear walls 140 and four side walls 130, depicting the area Z to be heated in which the user can place his feet. Of course, the number of walls of the footwell 13 may vary from vehicle to vehicle, depending on the various layouts of the passenger compartment.

In the example shown in fig. 4, the radiation panel 1 is integrated into one of the rear walls 140, here behind the tread 14, and three reflective elements 2 are located on three different side walls 130 facing the radiation panel 1. Thus, the radiant panel 1 is protected by the footboard 14 (when present) and the reflective element 2 is placed on the underside of the dashboard, on the door footboard and on the side walls of the center console or dashboard mid-section.

It should be noted that the side wall 130 forming the floor of the vehicle is free of the reflective element 2 or the radiating panel 1 so as not to disturb the user. Of course, a single reflective element 2 may be arranged on one of the side walls 130 facing the radiation panel 1 on one of the rear walls 140. It is also to be understood that the radiation panel 1 may be located on a side wall 130, while the reflective element 2 is optionally located on another side wall 130 and/or the rear wall 140. All footwells 13 of the vehicle may be equipped with the heating assembly 10.

As shown in fig. 4, the emission 3 emitted by the radiation panel 1 is partially reflected by the reflective element 2 into reflected rays 4, which reflected rays 4 are directed towards the area Z to be heated. More precisely, the area Z to be heated corresponds here to the volume delimited by the footwell 13 and to the bottom of the seat to heat the feet and the legs of the user sitting on the seat. It should be noted that a part of the emitted emission 3 is directed directly towards the region Z to be heated. Thus, when the radiation panel 1 is in operation, the user benefits from the emitted emissions 3 and the emissions 4 reflected onto his feet and legs.

In all of the above exemplary embodiments, the region of the integrated radiation panel 1 may be provided to be insulated to avoid heat loss to the outside of the vehicle.

The above description clearly explains how the invention allows to reach the set aims, in particular how it allows the heating assembly 10 to be able to emit infrared radiation while being easy to install. Such a heating assembly 10 may advantageously form a module intended for the after-market of motor vehicles.

Claims

1. A heating assembly (10) intended to be mounted in a passenger compartment (5) of a vehicle, comprising:

-a radiation panel (1) configured to emit at least one infrared emission (3), and

-at least one reflective element (2),

characterized in that said one or more reflective elements (2) have a reflectivity in infrared light, said one or more reflective elements (2) being positioned facing said radiation panel (1) so as to produce at least one reflection of said infrared emission (3),

wherein the area of the integrated radiating panel (1) is insulated to avoid heat losses to the outside of the vehicle.

2. The heating assembly according to claim 1, wherein the radiating panel (1) is positioned facing the one or more reflective elements (2) such that a viewing angle factor (F) between the radiating panel (1) and the reflective elements (2) or between the radiating panel (1) and each reflective element (2) is greater than 5%.

3. The heating assembly according to claim 1 or 2, wherein the radiating panel (1) is remote from the one or more reflective elements (2).

4. A heating assembly as claimed in claim 1, characterized in that a plurality of reflective elements (2) face the radiation panel (1).

5. A heating element as claimed in claim 1, characterized in that at least one reflective element (2) is transparent for wavelengths of 400nm to 800 nm.

6. A heating assembly according to claim 1, wherein the at least one reflective element (2) is reflective in visible light.

7. A motor vehicle comprising a passenger compartment (5), characterized in that it comprises at least one heating assembly (10) as defined in any one of the preceding claims, said heating assembly (10) being placed in said passenger compartment (5).

8. The motor vehicle according to claim 7, characterized in that the radiant panel (1) is located on the roof (7) of the vehicle and the at least one reflective element (2) is located on a shade (62) of the sun visor (6).

9. Motor vehicle according to claim 7 or 8, comprising pillars (9) extending between the roof and the lower body structure of the vehicle, characterized in that the radiant panel (1) is located on at least one of the pillars (9) and at least one reflective element (2) is located on at least a portion of the glass element of the vehicle.

10. The motor vehicle according to claim 7 or 8, comprising at least one footwell (13), characterized in that the radiant panel (1) is located on one of the walls (130, 140) forming the footwell (13) and at least one reflective element (2) is located on one or more other walls (130, 140) forming the footwell (13).