EXTRACTOR DEVICE WITH VAPOR GUIDE PLATE AND LIGHTING DEVICE

Description

[0001] The invention relates to an extractor device with a vapor guide plate and lighting device.

[0002] EP3502571A1 discloses the preamble of the independent claim and describes an extractor device with an extraction shaft forming an outlet opening at its upper end, and at least one vapor trap displaceably mounted in the extraction shaft and having at least one intake gap. The vapor trap can consist of at least two flat screen elements that are displaceable separately from one another relative to the extraction shaft. The intake gap is formed between the screen elements, and at least one of the at least two screen elements protrudes at least partially beyond the outlet opening of the extraction shaft in at least one position of the extractor device.

[0003] US 2010 / 065038 A1 describes an extractor hood that can be moved relative to the cooktop. The extractor hood can provide overhead lighting for the cooktop. The light is integrated into the extractor hood.

[0004] EP 3 540 316 A1 describes a cooktop with an extractor hood. The extractor hood is provided with an extraction opening arranged in the cooktop plate, which has a protective element, and has at least one light source or is connected to a light source in a light-conducting manner. The protective element has at least one light-conducting region made of light-conducting material and is connected to the at least one light source in a light-conducting manner.

[0005] WO 2018 / 050549 A1 discloses a lighting module for an extractor hood, which has a frame-shaped base body and at least one lighting element is arranged on the frame-shaped base body such that the at least one lighting element emits light in the plane of the frame-shaped base body.

[0006] For extractor hoods mounted above a hob, it is common practice to place light sources on the underside of the hood near the extraction system to illuminate the hob. In addition, for so-called downdraft systems, which are built into the worktop and in which the extractor housing protrudes above the worktop in which the hob is mounted, it is common practice to provide light sources at the top of the extractor housing. These light sources, which are usually mounted at a height of between 20 and 40 cm, illuminate the hob.

[0007] A disadvantage of this type of lighting is that, on the one hand, the light sources are directly visible to the user and, on the other hand, the light sources are exposed to the fumes and vapors rising from the hob.

[0008] It is therefore an object of the present invention to provide a solution with which the hob or a work surface can be illuminated by the extractor device with a simple construction of the extractor device and which at the same time can eliminate the disadvantages of the prior art.

[0009] The invention is based on the finding that this object can be achieved by providing indirect lighting by means of a part of the extractor device which fulfils further functions in addition to lighting.

[0010] According to the invention, the object is therefore achieved by an extractor device having the features of claim 1.

[0011] An extractor hood is a device for cleaning contaminated air, particularly fumes and vapors created during cooking. The extractor hood has at least one vapor guide plate. A vapor guide plate is a surface element that directs the air, which is sucked in by a fan inside the extractor hood, to the intake opening of the extractor hood. Multiple vapor guide plates can also be provided on the extractor hood. In particular, one vapor guide plate can be arranged in front of the intake opening and one behind the intake opening, in order to form a supply channel in front of the intake opening in the direction of flow. A filter element can be provided inside the extractor hood or in the intake opening. The contaminated air is preferably sucked downwards through the intake opening.

[0012] According to the invention, the at least one vapor guide plate represents a light guide. In particular, the vapor guide plate is made of a material suitable for light conduction. According to one embodiment, the vapor guide plate is made of glass, i.e., it is formed by a glass pane. The surfaces of the glass pane are preferably polished, whereby light introduced into the glass pane via one of its edges is reflected by the surfaces and thus transmitted. The vapor guide plate can also be referred to as a passive light guide.

[0013] A lighting device, which can also be referred to as a lighting module or lighting device, is a device through which light is emitted. According to the invention, the lighting device has at least one light source. The light source can be an LED (light-emitting diode). The light source can be arranged on a circuit board. Furthermore, at least the light source can be enclosed by a housing to protect it from contamination. The circuit board on which the at least one light source is arranged can also be accommodated in the housing. The housing is preferably transparent.

[0014] According to the invention, the lighting device faces the vapor guide plate. In particular, the lighting device faces an edge of the vapor guide plate, in particular the lower edge of the vapor guide plate. Facing the vapor guide plate refers to an orientation of the lighting device in which light emitted from the lighting device can reach the vapor guide plate and in particular the edge of the vapor guide plate directly, i.e., without deflecting elements. According to one embodiment, the lighting device can therefore rest against the edge of the vapor guide plate or be arranged in close proximity to the edge of the vapor guide plate. However, it is also within the scope of the invention for there to be a distance between the lighting device and the edge of the vapor guide plate towards which the lighting device faces.The edge facing the lighting device is also referred to as the lower edge of the vapor guide plate. By facing the lighting device toward the vapor guide plate, the light emitted by the lighting device can be directed into the vapor guide plate.

[0015] Directional specifications such as top and bottom, as well as specifications such as width and height, refer – unless otherwise stated – to an extractor hood and its components in an assembled state. In particular, these specifications refer to an extractor hood with at least one vapor guide plate positioned vertically, with the extractor hood mounted in a horizontal worktop behind a hob and extending behind it in the width direction of the hob.

[0016] According to the invention, a reflective surface is formed on an edge of the vapor guide plate facing away from the lighting device. The reflective surface can also be referred to as an active surface. The edge on which the reflective surface is formed is preferably the upper edge of the vapor guide plate. Additionally, at least some of the side edges of the vapor guide plate can also be designed as reflective surfaces.

[0017] By forming a reflective surface on an edge of the vapor guide plate facing away from the lighting device, the light guided by the vapor guide plate can be specifically directed in a certain direction. Thus, indirect lighting of, for example, a hob or worktop can be achieved with the extractor hood according to the invention. Since the vapor guide plate for directing the vapors and steam to the intake opening of the extractor hood must be provided independently of the lighting device, no additional component is necessary for the indirect lighting. This simplifies the structure of the extractor hood. In addition, the at least one lighting device can be arranged below the worktop and the light emitted by it can be guided upwards via the vapor guide plate and emitted above the worktop.This means that the lighting device and the at least one light source provided in the lighting device are not visible to the user. Furthermore, the possible arrangement of the at least one lighting device below the worktop prevents fumes and vapors from directly impacting the lighting device, thus protecting the lighting device from contamination.

[0018] According to a preferred embodiment, the reflection surface is at an angle other than 90° to the surfaces of the vapor guide plate. The surfaces of the vapor guide plate that are connected to one another via the edges are referred to as surfaces of the vapor guide plate. The vapor guide plate is preferably arranged in front of or behind an intake opening that is located behind a cooking surface and extends in the width direction of the cooking surface. The vapor guide plate preferably also extends in the width direction of the cooking surface. The surfaces of the vapor guide plate can therefore be referred to as the front and back. By inclining the reflection surface to these surfaces, light that is directed upwards in the material of the vapor guide plate and thus between the surfaces can be deflected at the upper edge of the vapor guide plate and in particular directed to the worktop or a cooking surface that is located in front of the vapor guide plate and illuminates it.Preferably, the reflection surface is therefore inclined downwards at an angle from the front of the vapor guide plate to the back of the vapor guide plate.

[0019] The reflective surface can be a flat surface. However, it is also within the scope of the invention and is preferred for the reflective surface to have a curvature. In particular, the reflective surface preferably has a concave curvature. The curvature can lie in the width direction of the vapor guide plate. In this case, a fixed center of the radius of curvature can be located behind the vapor guide plate and above the upper edge of the vapor guide plate. By curving the reflective surface in this way, the light emitted by the reflective surface can be fanned out in the width direction.

[0020] According to a preferred embodiment, the reflective surface has a concave curvature extending in the vertical direction of the vapor guide plate. This means that the reflective surface of the vapor guide plate has a concave curvature in cross-section. This allows the light reflected by the reflective surface to be spread out vertically. This ensures the illumination of a cooktop intended to be illuminated by the lighting device in the depth direction.

[0021] It is also within the scope of the invention for the concave curvature to be present both in the width direction and in the height direction of the reflection surface. In this embodiment, the light can be emitted from the reflection surface in a fanned-out manner in both the vertical and horizontal directions.

[0022] Even if the reflection surface is designed as a concave surface, this is preferably provided on the back of the vapor guide plate.

[0023] The reflective surface can be designed as a polished surface. This allows the light guided through the vapor guide plate to be reflected on the inside of the reflective surface. One advantage of designing the reflective surface as a polished surface is that it is easy to create and no separate components are required.

[0024] According to a further embodiment, the reflective surface can be formed by a coating on a portion of the vapor guide plate. The reflective surface is preferably formed by an upper edge of the vapor guide plate that is inclined between the front and back of the vapor guide plate. The coating can be applied to the inclined edge and, if appropriate, to the back of the vapor guide plate. A metallic coating, a white or black paint, for example, can be used as the coating material.

[0025] According to a further embodiment, the reflection surface is formed by a reflector attached to the vapor guide plate. In particular, the reflector is attached to the upper edge of the vapor guide plate, which faces away from the lighting device. The reflector can, in particular, be a reflector plate having an L-shaped profile.

[0026] Both in an embodiment with a coating and in an embodiment with a reflector, according to the invention, an inclination of the edge and / or a curvature of the edge forming the reflection surface can be provided.

[0027] The vapor guide plate is made of a light-conducting material. In particular, the vapor guide plate can be made of glass, Plexiglas, or another light-conducting plastic.

[0028] According to the invention, an optical element for introducing light via the edge of the vapor guide plate facing the lighting device is arranged between the lighting device and the vapor guide plate. The optical element can be, for example, a lens or a diffuser. The edge of the vapor guide plate facing the lighting device can have a polished or matte, in particular roughened, surface. By providing an optical element, in particular a lens, a targeted introduction of light from the lighting device into the vapor guide plate can be ensured.

[0029] According to the invention, the extractor device has an intake opening through which air is drawn downwards, and at least one vapor guide plate is arranged adjacent to the intake opening. In this embodiment, the invention can also be referred to as a table fan, countertop fan, or downdraft fan. In this embodiment, the inventive design of the vapor guide plate can be particularly well utilized as a light guide. In particular, the vapor guide plate can be used as a design element or as a functional light thanks to the light input from the lighting device.

[0030] According to one embodiment, two vapor guide plates are provided, and a reflective surface is formed on only one of the vapor guide plates, while the other vapor guide plate is matte, in particular roughened, at least on the edge facing away from the lighting device. In this embodiment, one of the vapor guide plates is preferably arranged between the cooking surface and the intake opening, and the other vapor guide plate is arranged behind the intake opening. In this embodiment, the rear vapor guide plate can be higher than the front vapor guide plate. In the embodiment with two vapor guide plates, the rear vapor guide plate preferably has a reflective surface on its upper edge. As a result, the cooking surface located in front of the vapor guide plates can be well illuminated due to the generally higher height of the vapor guide plate.A reflective surface can also be formed on the upper edge of the front vapor guide plate, allowing the hob to be illuminated by this vapor guide plate. However, it is also within the scope of the invention for the front vapor guide plate to be matte and, in particular, roughened along its upper edge. This allows the light directed upwards by the vapor guide plate to be diffused from the edge.

[0031] The invention is described again below with reference to the accompanying figures. They show: Figure 1: a schematic perspective view of an embodiment of the extractor device according to the invention; Figure 2: a further schematic perspective view of the embodiment of the extractor device according to the invention according to Figure 1; Figure 3: a schematic sectional view through an embodiment of the extractor device according to the invention in the area of ​​the vapor guide plates; Figure 4: a schematic sectional view through an embodiment of the extractor device according to the invention in the area of ​​the lighting device; Figure 5: a schematic sectional view through a further embodiment of the extractor device according to the invention in the area of ​​the lighting device; Figure 6: a schematic schematic diagram of a vapor guide plate with lighting device; Figures 7 and 8: a schematic representation of the beam path of the light at the upper edge and the lower edge of the vapor guide plate; Figure 9: a schematic schematic diagram of a vapor guide plate with lighting device; and Figures 10 and 11: a schematic representation of the beam path of the light at the upper edge and the lower edge of the vapor guide plate.

[0032] In Figure 1A perspective view of an embodiment of the extractor device 1 according to the invention is shown. The extractor device 1 is arranged in a worktop 6 behind a hob 5. The extractor device 1 has an extractor housing 2, of which Figure 1 only the top is visible. An intake opening 20 is provided in the top of the extractor housing 2. Vapors and fumes generated during cooking on the hob 5 can be sucked into the extractor device 1 through this intake opening 20. For this purpose, the extractor device 1 has a fan, which is not shown in the figures.

[0033] In the Figure 1In the embodiment shown, the extractor device 1 has two vapor guide plates 3. In particular, a vapor guide plate 3 is provided in front of the intake opening 20, that is to say between the intake opening 20 and the cooking surface 5, as well as behind the intake opening 20. The vapor guide plates 3 are arranged vertically and are flat plates, in particular glass plates. The vapor guide plates 3 extend in the width direction of the extractor device 1, that is to say also in the width direction of the cooking surface 5. The front vapor guide plate 30 has a smaller width and a smaller height than the rear vapor guide plate 31. Below the intake opening 20, in the extractor device 1 and in particular in the extractor housing 2, a lighting device (in Figure 1 not visible) through which light can be introduced into the vapor guide plates 3.

[0034] In the Figure 2is the embodiment of the extractor device 1 according to Figure 1 shown in the state in which the lighting device is activated, i.e. switched on. In this state, light that has been directed upwards by the vapor guide plate 31 is redirected at the upper edge 31 of the rear vapor guide plate 31. This redirected light is emitted forwards. In particular, the light is emitted at an angle downwards. The light can therefore illuminate the hob 5. In the embodiment shown, the front vapor guide plate 30 is not illuminated. However, it is also within the scope of the invention for light to be emitted at an angle forwards and downwards from the upper edge 301 of the front vapor guide plate 30. Alternatively, ambient light can be emitted from the front vapor guide plate 30 and / or the upper edge 301 and optionally the upper region of the lateral edges of the front vapor guide plate 30 can be illuminated.

[0035] In the Figure 3 A sectional view of an embodiment of the extractor device 1 is shown in the area of ​​the vapor guide plates 3. In this embodiment, the vapor guide plates 30, 31 are each vertical. The lower edges 300, 310 of the front vapor guide plate 30 and the rear vapor guide plate 31 each face a lighting device 4. A reflection surface 32 is formed on the upper edge 311 of the rear vapor guide plate 31. For this purpose, the rear side of the upper edge 311 is beveled and serves as a reflector. As shown in Figure 3 shown, the upwardly directed light is deflected in the vapor guide plate 31 and emitted at an angle to the front and downwards.

[0036] In the Figures 4 and 5Possible configurations of the extractor hood 1 in the area of ​​the lighting device 4 are shown. In these embodiments, a lighting device 4 is provided with an optical element 42 mounted thereon or integrated into the lighting device 4. The lighting device 4 has a lighting unit 41. The lighting unit 41 comprises at least one circuit board and at least one light source 410, for example, an LED, mounted on the circuit board. The light source 410 is directed upwards.

[0037] In the embodiment according to Figure 4 The lighting device is clipped into a support plate of the extractor housing, in which the vapor guide plates 30, 31 are accommodated. The vapor guide plates 30 can be supported separately in the extractor housing. In the embodiment according to Figure 4On or in the upper side of the lighting device 4, which faces the lower edge 300 of the front vapor guide plate 30, a diffusing disc 421 is provided as an optical element 42. Light from the lighting device 4 can be diffusely introduced into the front vapor guide plate 30 via this lens 421. On or in the upper side of the lighting device 4, which faces the lower edge 310 of the rear vapor guide plate 31, a lens 420 is provided as an optical element 42. Light can be directed into the rear vapor guide plate 31 through this lens 420. In the embodiment of the Figure 4 The front vapor guide plate 30 and the rear vapor guide plate 31 each sit directly with their lower edges 300, 310 on the respective optical element 42. The upper side of the optical element 42 is adapted to the shape of the lower edge 300, 310.

[0038] The embodiment according to Figure 5differs from the embodiment according to Figure 4 in that an intermediate lens 43, which can also be referred to as an intermediate profile, is provided between the optical element 42 and the lower edge 300, 310 of the respective vapor guide plate 30, 31. In this embodiment, the intermediate lens 43 has a shape adapted to the lower edge 300, 310 on its upper side. The underside of the intermediate lens 43 is flat and rests on the likewise flat upper side of the optical element 42. In the embodiment according to Figure 5 The intermediate lens serves as a sealing element and as protection. In this embodiment, the illumination device 4 is located below the carrier plate.

[0039] With reference to the Figures 6, 7 and 8 Now, various embodiments of the light introduction and light emission from a vapor guide plate 3 are described. Here, the vapor guide plate 3 is referred to as the rear vapor guide plate 31, which in the Figures 1 to 5is shown. However, the vapor guide plate 3 can also be the front vapor guide plate 30.

[0040] In the prince sketch of the Figure 6 It is shown that several light sources are located below the lower edge of the vapor guide plate. The width of the vapor guide plate can be, for example, 600 mm. The height of the vapor guide plate can be, for example, 320 mm, and the thickness can be, for example, 6 mm. The material of the vapor guide plate can be ESG (tempered safety glass) white glass. As can be seen from the side view of the vapor guide plate on the left in Figure 6 A reflection surface is provided on the upper edge of the back of the vapor guide plate.

[0041] Different designs of the area of ​​the upper edge of the vapor guide plate 31 are shown in the Figures 7a to 7e shown. In the Figure 7aThe upper edge on the back has a bevel as a reflection surface, which can be, for example, a 5 x 35° bevel. The surface of the bevel is polished. Figure 7b The reflection surface on the upper edge of the vapor guide plate is designed as a concave chamfer. The surface of the chamfer is polished. Figure 7c The reflection surface on the upper edge of the vapor guide plate is designed as a concave bevel and its surface is polished. In addition, in the embodiment according to Figure 7c Additionally, a reflector is attached to the upper edge. The reflector is glued to the vapor guide plate. The reflector can be a reflector plate. In the embodiment shown, the reflector plate has an L-shape. One leg lies on the top side of the vapor guide plate and the other leg on the back side of the vapor guide plate. Figure 7dThe reflection surface on the upper edge of the vapor guide plate is also designed as a concave bevel with a polished surface. In this embodiment, paint is applied to both the upper surface of the vapor guide plate and the bevel. The paint can be black or white. The embodiment according to Figure 7e corresponds to the embodiment according to Figure 7d However, in this version, in addition to the bevel and the top, the back of the vapor guide plate is also painted.

[0042] As can be seen from the Figures 7a to 7e The design of the reflection surface can be used to redirect the light beam path and, if necessary, to fan it out.

[0043] In the Figures 8a and 8b Examples of the design of the lower edge of the vapor guide plate are shown. In the embodiment of the Figure 8aThe lower edge of the vapor guide plate is designed as a C-shaped cut and has a polished surface. This design can be used for all versions of the upper edge of the vapor guide plate according to Figures 7a to 7e The design of the Figure 7b differs from the design of the Figure 7a only by applying a lacquer to the back of the vapor guide plate. This design is particularly suitable for the design of the upper edge according to Figure 7e suitable, whereby in this case the entire back of the vapor guide plate can be painted.

[0044] The designs of the upper and lower edges of the vapor guide plate of the Figures 7 and 8 can be used in particular to generate working light, especially to illuminate the hob.

[0045] With reference to the Figures 9, 10 and 11Now, various embodiments of the light introduction and light emission from a vapor guide plate 3 are described. Here, the vapor guide plate 3 is referred to as the front vapor guide plate 30, which in the Figures 1 to 5 is shown. However, the vapor guide plate 3 can also be the rear vapor guide plate 31.

[0046] In the prince sketch of the Figure 9 It is shown that several light sources are located below the lower edge of the vapor guide plate. The width of the vapor guide plate can be, for example, 480 mm. The height of the vapor guide plate can be, for example, 220 mm and the thickness, for example, 6 mm. The material of the vapor guide plate can be ESG (tempered safety glass) white glass. As can be seen from the side view of the vapor guide plate on the left in Figure 9 In the embodiment shown, no reflection surface is provided on the back of the vapor guide plate at the upper edge.

[0047] Different designs of the area of ​​the upper edge of the vapor guide plate 30 are shown in the Figures 10a to 10c shown. In the Figure 10a The upper edge has the shape of a C-cut with a polished surface. Figure 10b The upper edge has the shape of a C-cut with a matte surface. Figure 10c The upper edge has a C-shaped cut with a matte finish, and the back of the vapor deflector plate is painted. The paint can be white or black.

[0048] In the Figures 11a to 11c The design of the lower edge of the vapor guide plate is shown. In the design of the Figure 11a The lower edge of the vapor guide plate is designed as a C-shaped cut and has a polished surface. This design can be used particularly for the upper edge of the vapor guide plate according to Figure 10a The design of the Figure 11bdiffers from the design of the Figure 11a by the fact that the lower edge is matt. This design can be used in particular for the upper edge of the vapor guide plate according to Figure 10b The design of the Figure 11c differs from the embodiment according to Figure 11b only because the vapor guide plate is painted on the back.

[0049] The designs of the upper and lower edges of the vapor guide plate of the Figures 10 and 11 can be used in particular to create ambient light.

[0050] The extractor hood of the present invention makes it possible to illuminate a cooktop. The illumination is provided by an extractor hood installed in the worktop via a reflective surface, which can also be referred to as an optically active surface, on a passive light-conducting element, in particular a vapor guide plate. The invention also makes it possible to make this illumination of the cooktop as bright and uniform as possible.

[0051] In the invention, a so-called downdraft extractor system illuminates the hob by directing light into a vapor guide plate designed as a light guide in the area below the worktop, which is not directly visible to the user. This light is then directed back toward the hob via the light guide's reflective surface above the hob. The light-emitting edge of the vapor guide plate can be designed as a reflector.

[0052] The precise geometry of the reflective surface, which can also be referred to as a reflective element, is designed to allow as much light as possible to reach the cooking surface. Furthermore, glare for the user is reduced to a minimum.

[0053] Furthermore, it is conceivable that the light guide could be made largely resistant to grease and dirt deposits using certain coating processes (the lotus effect). This prevents or minimizes stray light from being coupled out at undesired locations.

[0054] One advantage of the invention is that it can be used with pure glass or glass with a coated / encased surface (or alternatively with glass-like materials such as Plaxiglas or similar). Further advantages of the invention lie in the concealment of the light sources.

[0055] When positioned below the worktop, the light sources are also protected from the influences on the hob.

[0056] A further advantage is that the light-conducting vapor guide plate, preferably made of glass, can be removed, cleaned, or replaced independently of the light source and its power supply. A direct mechanical connection between the lighting device and the vapor guide plate is not necessary. List of reference symbols

[0057] 1 Extractor hood 2 Extractor housing 20 Intake opening 3 Vapor guide plate 30 Front vapor guide plate 300 Lower edge 301 Upper edge 31 Rear vapor guide plate 310 Lower edge 311 Upper edge 32 Reflecting surface 4 Lighting device 41 Light unit 410 Light source 42 Optical element 420 Lens 421 Diffuser 43 Intermediate lens 5 Hob 6 Worktop

Claims

1. Vapour extraction apparatus with at least one steam-conducting plate (3) and at least one illumination facility (4), which comprises at least one light source (410), wherein the vapour extraction apparatus (1) has a suction opening (20), via which air is drawn in downwards and the at least one steam-conducting plate (3) is arranged adjacently to the suction opening (20) and wherein the steam-conducting plate (3), which represents a surface element that conducts the air, which is drawn through a fan inside the vapour extraction apparatus, to the suction opening of the vapour extraction apparatus, represents a light conductor, the illumination facility (4) faces towards the steam-conducting plate (3), characterised in that a reflection surface (32) is embodied on at least one part of an edge (301, 311) of the steam-conducting plate (3), which faces away from the illumination facility (4), so that the light conducted through the steam-conducting plate (3) is directed in a particular direction in a targeted manner, and that an optical element (42) for introducing light via the edge (300, 310) of the steam-conducting plate (3) that faces towards the illumination facility (4) is arranged between the illumination facility (4) and the steam-conducting plate (3).

2. Vapour extraction apparatus according to claim 1, wherein the reflection surface (32) lies at an angle, which differs from 90°, in relation to the surfaces of the steam-conducting plate (3).

3. Vapour extraction apparatus according to claim 2, wherein the reflection surface (32) represents a flat surface.

4. Vapour extraction apparatus according to one of claims 1 or 2, wherein the reflection surface (32) has a concave shape, which extends in the width direction of the steam-conducting plate (3) and / or in the height direction of the steam-conducting plate (3).

5. Vapour extraction apparatus according to one of claims 1 to 4, wherein the reflection surface (32) is embodied as a polished surface.

6. Vapour extraction apparatus according to one of claims 1 to 5, wherein the reflection surface (32) is formed by a coating of a part of the steam-conducting plate (3).

7. Vapour extraction apparatus according to one of claims 1 to 6, wherein the reflection surface (32) is formed by a reflector that is fastened to the steam-conducting plate (3).

8. Vapour extraction apparatus according to one of claims 1 to 7, wherein the steam-conducting plate (3) consists of glass.

9. Vapour extraction apparatus according to one of claims 1 to 8, wherein two steam-conducting plates (3) are provided and a reflection surface (32) is formed only on one of the steam-conducting plates (31) and the other steam-conducting plate (30) is matt at least on the edge (301) facing away from the illumination facility (4).