DE102010040509A1 - Hood - Google Patents

Abstract

An extractor hood (1), in particular for a hotplate (2), comprises at least one lighting device (5) which has a reflector (7) for light (9) emitted by a lamp (6) for the lighting device (5). The reflector (7) has a glossy surface with a reflectometer value of over 60.

Description

The present invention relates to an extractor hood with a lighting device.

In known extractor hoods lights are often integrated in the form of incandescent or halogen lamps. The integrated into an extractor hood lamp serves to illuminate a corresponding hob, for which the extractor hood is provided. Due to legal guidelines, special conditions are increasingly being placed on luminaires and the illuminants used. For example, it is desirable to minimize the energy consumption of luminaires and, in particular, of integrated luminaires in extractor hoods. In known extractor hoods, however, commercial lighting, which are known from other applications, for example, from the ceiling lighting used.

Against this background, it is an object of the present invention to provide an improved extractor hood.

Accordingly, an extractor hood, such as for a cooking area, is provided with at least one illumination device, which comprises a reflector for light emitted by a light source for the illumination device. The reflector has a glossy surface with a reflectometer reading of over 60.

The reflectometer value results in particular at 60 ° irradiation angle and according to a standard or a standard, in particular according to DIN 67 530 . EN ISO 2813 or ISO 7668 ,

The extractor hood is further designed in particular to extract fume or heat from a cooking area or a cooking area. There are, for example, recirculation or exhaust-driven cooker hoods known. In this case, generally known mechanisms and embodiments are used.

The intended illumination device, which is integrated in particular in the extractor hood, results in a particularly efficient illumination through the selected degree of gloss or reflectometer value of the reflector. The degree of gloss or else the glossiness or the reflector value corresponds to the proportion that a surface contributes to the formation of the gloss impression due to its reflection properties. By default, the reflectometer value is the ratio of the luminous flux reflected by a sample and a glass surface with refractive index 1.567 in the mirror direction. For a suitable reflectometer value scale, for polished black glass with a refractive index of 1.567, the value 100 is set for measurement geometries of 20 °, 60 ° and 85 ° irradiation angle. The reflectometer value is also often given in percent. For example, one speaks with a reflectometer value of 150 of mirror gloss. The terms reflectometer value, gloss, gloss and gloss can be used synonymously.

The special design of the surface of the reflector leads to a particularly efficient reflection of the illuminant light, for example in the direction of the cooking surface or cooking surface. The proposed extractor hood makes it possible to use particularly economical lamps as lighting. In particular, 20 watts or 25 watts of halogen lamps are suitable as bulbs. Also conceivable is an equipment of the hood with multiple lighting devices.

In the case of the extractor hood, the reflectometer value of the reflector is preferably in a range between 60 and 100, in particular at an irradiation angle of 60 °. In a further preferred embodiment of an extractor hood, the reflectometer value is in a range between 70 and 90, in particular at an irradiation angle of 60 °.

Conventional illumination devices for other applications usually include reflectors with less glossy surfaces, as is placed on a special energy efficiency lesser value. Particularly in combination with an extractor hood, which comprises an integrated lighting device, according to the Applicant's investigations with the specified reflectometer values for the reflectors, particularly good illuminations of the respective cooking area or of the cooking area for which the extractor hood is provided are obtained.

Preferably, the reflector is at least partially formed of aluminum, in particular of anodized aluminum. It is also called an anodized aluminum. In the anodizing process for producing anodized aluminum, an oxidic protective layer on aluminum is created by anodic oxidation.

Furthermore, the surface may be polished to achieve the desired level of gloss or reflectometer value. Aluminum is an easy-to-process material that is already used today for reflectors in conventional lighting fixtures.

The reflector may also be formed at least partially of metal-coated material, in particular silver vapor-deposited glass. By a Metal vapor deposition with, for example, silver or aluminum, a glossy surface can be achieved with the desired reflectometer value.

In one embodiment of the extractor hood, the reflector is substantially dome-shaped. The reflector preferably encloses at least partially a position of the luminous means in a substantially dome-shaped manner. The symmetrical shape of the reflector may, for example, be based on a spherical section, a dome, a spherical segment, a spherical cap or the like. By means of a spherical surface or an inner surface of a sphere, the light emitted by the lighting means, for example by a halogen lamp, can be conducted suitably in the direction of the cooking zone.

In a further embodiment, the reflector has a straight, for normal arrangement of the hood, substantially vertical section for a light source holder. It may, for example, result in a hemispherical laterally truncated shape of the reflector. The vertical straight section is used for attaching or passing wires and a suitable lamp socket or socket. Preferably, therefore, the extractor hood has a bulb socket, which is designed as a pin header for a halogen lamp, in particular as a G4, G5 or G9 socket. Through the base or the socket results in a light bulb base axis. As light bulbs in particular halogen lamps, low voltage or high voltage with 20 or 25 watts are suitable.

The extractor hood is further configured such that a longitudinal axis of the illuminant or the illuminant holder encloses an angle between 10 ° and 20 ° with respect to a horizontal with an appropriate arrangement of the hood. Particularly advantageous is an angle of 12 °. When the cooker hood is arranged above a cooking position, the illuminant holder then points obliquely downwards and forwards towards an operating or operator side. In this geometric constellation results in a particularly simple and good illumination of the hob. Preferably, therefore, the longitudinal axis of the lamp or the bulb holder is inclined towards an operating side.

In a preferred embodiment, the spherical reflector is inclined at an angle between 10 ° and 20 °, in particular 12 °, relative to a horizontal. especially when the hood is installed as intended, this results in a good illumination of the hob.

Furthermore, with appropriate arrangement of the hood for a hotplate, a bulb socket can be arranged in or on the reflector with respect to an operating side of the cooking surface. This facilitates, for example, the wiring of the lighting device.

The lighting device is furthermore preferably arranged on the underside of the extractor hood. The lighting device may also be integrated into the housing of the extractor hood or attached thereto.

In one embodiment, the illumination device has a transparent pane, in particular a lamp glass, for protecting the reflector and / or a luminous means to the outside. As a result, the elements present within the illumination device, such as the reflector or the lamp, are protected from soiling or fogging with the vapors or vapor to be sucked off.

Furthermore, in the case of the extractor hood, the reflector and / or an aperture are preferably designed in such a way that, when the extractor hood is used as intended for a hotplate, a light cone exclusively illuminates the cooking area. Preferably, adjacent areas outside the cooking area are shaded by the aperture or the shape of the reflector. This results in a particularly favorable and uniform illumination of the hotplate, especially in the selected gloss property of the surface of the reflector.

Furthermore, a method for producing a cooker hood for a hotplate is proposed. In this case, the extractor hood has an illumination device with a reflector for light emitted by a predetermined illuminant. The method comprises the steps of: detecting an illuminance of the illumination device with the prescribed illuminant when the extractor hood is arranged as intended, in particular above a cooktop or a hotplate; Adjusting a reflectometer value of a surface of the reflector such that a predetermined minimum illuminance is present at the cooking location. In this case, the adaptation takes place by machining the surface of the reflector, in particular by means of polishing.

The manufacturing process leads to a particularly favorable combination of illuminants used, such as low-voltage halogen lamps and the gloss of the reflector. As a result, the illuminance at the cooktop, hob or cooking surface, which is measured for example in lumens, especially achieved evenly with sufficient strength. Thus, the generated luminous flux is used by the lamp for the working area of the cooktop more efficient than usual. Overall, there is a lower energy consumption. In particular, when using anodized reflectors, such as anodized aluminum, there are a number of advantages. In particular, the combination of an inclination of the base and the predetermined or determined degree of gloss results in an optimal light distribution.

In the proposed manufacturing method, in particular, an extractor hood according to the extractor hood described above is produced.

It is the environment is less illuminated, so that the light arrives only at the hob. In the production of cooker hoods, no change in the assembly operations is necessary. It also produces less heat radiation than reflectors with lower gloss levels.

On the one hand, this results in a higher luminous flux due to the improved reflection at the reflector of the illumination device and on the other hand a lower heat transfer into the interior of the extractor hood than in conventional devices. Especially with flat housing forms of cooker hoods, the lower self-heating advantage. Ultimately, legal requirements for energy efficiency class C can be easily achieved. Overall, there is a cost-producible extractor, which is future-proof.

Further possible implementations of the invention also include not explicitly mentioned combinations of features described above or below with regard to the exemplary embodiments. The expert will also add individual aspects as improvements or additions to the respective basic shape of the pot carrier or the cooking area.

Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures.

It shows:

1 : a schematic representation of a first embodiment of an extractor hood for a cooking area in cross section;

2 : Illustrations of an embodiment of a lighting device for an extractor hood;

3 . 4 : Illustrations of an embodiment of a reflector for a lighting device for an extractor hood; and

5 : Illustrations of illuminances on hobs for comparison of lighting equipment.

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise.

The 1 shows a schematic representation of a first embodiment of an extractor hood for a cooking area in cross section. The 1 shows first a stove, which stands on a floor F and with a cabinet 17 and a hob 2 Is provided. The stove top 2 For example, has several cooking zones, such as hot plates or gas burners 3 , and on the front or operator side B are controls 4 , such as gag or knobs provided. At a predetermined height H above the cooking surface 2 is the bottom U of the hood 1 intended. The extractor hood 1 is mounted on a wall W. There are also other embodiments of cooker hoods that are meal-shaped or have more adapted to the conditions of the installation site geometries. The extractor hood, while not explicitly shown, also has known means for extracting vapor or cooking fumes through the underside during recirculation or exhaust operation.

The extractor hood 1 has to illuminate the cooking surface 2 a lighting device 5 which fit into the housing of the extractor hood 1 is integrated. It is a reflector 7 provided, the hemispherical a position of the bulb 6 includes. As a light source in particular a low or high voltage halogen lamp of 20 or 25 watts is provided. Outward, towards the hob 2 is the lighting device 5 with a glass 8th provided so that the reflector or the lamp or the lamp 6 do not get dirty.

The reflector 7 is arranged such that, for example, with the aid of a diaphragm, a light cone 9 , starting from the lighting device 5 excluding the cooking surface 2 illuminated. The area outside the cooking surface 2 is shaded, for example.

For example, with approximately 60 cm wide extractor hoods, two corresponding lighting devices can be provided. At islands of cooker hoods, which are not arranged on a wall W, but hang, for example, above a hob from the ceiling, four lighting devices are also conceivable, which are arranged in the edge region of the underside of the hood. 90 cm wide hoods usually have two or three lighting devices.

In particular, an illuminance on the hob 2 preferably greater than 400 lux, is the gloss of the reflector 7 adjusted accordingly. The degree of gloss is preferably greater than 60 units, ie the reflectometer value is greater than 60.

The gloss level or reflectometer value of surfaces is usually determined by the DIN 67 530 . DIN EN ISO 2813 or ISO 7668 determined. To determine the gloss level or reflectometer value, the primary standard used is a polished black glass plate whose refractive index is n = 1.567 at a wavelength of 589 nm. The reflectivity is measured with a reflectometer usually at angles of 20 °, 45 °, 60 ° and 85 ° and set to 100% for the primary standard of the polished black glass plate.

Investigations by the applicant have shown that gloss levels of more than 60 are particularly favorable at an angle of incidence or reflectometer angle of 60 °. Values of> 100 gloss units are also referred to as mirror gloss and can lead to spot-like illuminations and very bright zones in the middle of the working area of the hob 2 to lead. Therefore, in some embodiments of the cooker hood reflectometer values are provided for the respective reflectors of the lighting device between 60 and 100. When using low-voltage halogen spotlights, values of 80 +/- 5 gloss units or reflectometer value = 80 +/- 5 are also advantageous and provided.

The proposed extractor hood provides with its integrated lighting device excellent illumination of the work area, which is neither too dark, nor unpleasant reflections or spot-like illumination on the work area entails. The proposed values allow the use of low-voltage installations and particularly energy-saving lamps. For example, 20 watts, 12 watts of halogen lamps with a G4 socket in a corresponding extractor hood are suitable. This results in a 60 cm wide wall unit of a cooker hood, as shown schematically in the 1 is shown with two corresponding lighting devices 5 , an illuminance of about 450 lux at the hob 2 ,

The 2 shows representations of an embodiment of a lighting device, as shown for example in the 1 can be used. It is in the 2A a plan view in the 2 B a side view in the 2C a perspective view and 2D a cross-sectional view of the lighting device 5 shown. It can be seen in the perspective view of 2C a can-shaped configuration of a lamp housing 11 , which is used for example in the interior of the extractor housing. In the 2A can be seen in the plan view of a circular lamp glass 8th that has a fastening ring 14 on the housing 11 fastened from the outside. The lamp glass 8th preferably closes off just with the bottom of each extractor hood. In the 2 B you can see the lateral cross section of the housing 11 ,

The 2D shows a cross section along the section axis AA. You can see the case 11 , in which the reflector 7 is used. The reflector 7 has a spherical segment-shaped surface which is dome-shaped around a position of the luminous means 6 runs. At the back of the case 11 is by means of a fastener 18 like a rivet or screw, the reflector 7 attached. The reflector 7 on the one hand has the dome-shaped section 13 and on the other hand a straight section 12 on which a lamp base 10 is attached. In the lamp base 10 For example, a G4 or G5 jack, is a corresponding halogen lamp 6 plugged in. The halogen lamp 6 has its filament essentially centrally within the reflector 7 , It can also be seen that a longitudinal axis 15 of the lamp socket 10 and the halogen lamp 6 relative to a horizontal inclined by the angle α. The angle α preferably has 12 °. Furthermore, the ball portion of the reflector 7 , which may also be referred to as a dome, spherical segment, spherical cap or ball cap to be inclined by the angle α relative to the horizontal H.

The cover glass 8th protects the interior of the lighting device 5 against dirt and steaming. The reflector 7 is made, for example, of aluminum and provided with a shiny anodized coating. The anodizing coating may be between 6 and 8 microns and has been polished to 80 +/- 5 gloss units. This results in a particularly good reflection in the direction of the cooking surface, which in the orientation of 2 will be arranged below. The pedestal is towards a wall, for example in the 1 the wall W, directed.

In the 3 and 4 Further illustrations of an embodiment of a reflector for a corresponding illumination device are shown.

The 3 shows in the 3A a side view of a reflector 7 , in the 3B a plan view of a reflector, in the 3C and 3D in each case a sectional view along the axes BB and AA. One recognizes in the 3A the dome-shaped configuration of the reflector 13 , The dome is with a straight section 12 touched on how to get in the 3B recognizes. This results in a hood or dome-shaped area 13 of the reflector 7 and a straight section 12 , In the middle of the reflector 7 is the light source, for example a halogen lamp 6 , intended. It can be seen in the cross section of 3C along the axis BB, that in the straight section 12 an opening 16 is provided, through which the base and the wiring for the light source is guided. In the cross-sectional view of 3D it can further be seen that the dome-shaped region of the reflector or the spherical segment 13 is inclined at an angle α relative to the horizontal H. The angle is preferably 12 °. This leads to a particularly favorable illumination of the cooking surface.

The 4 shows perspective views of the reflector 7 with the dome-shaped section 13 and the straight section 12 , In this case, in particular the inside of the reflector, that is to say the side facing the luminous means, is configured in such a way that the degree of gloss or reflectometer value is between 60 and 90, and in particular lies at 80.

Finally, in the 5 how the illuminance on cooktops can depend on the degree of gloss setting. In the 5 is the illuminance on a hob, as for example in the 1 is shown using various lighting devices for cooker hoods shown. The gray values correspond to illumination intensities in the unit lux. The area with the hatching L1 roughly corresponds to an lux value of 375. The bright area L2 corresponds to a lux value of 500 lux. The dark gray area L3 corresponds to about 400 lux, the gray one Area L4 250 lux and the black area L5 125 lux.

In the upper 5B is the illumination of a hob with a low voltage halogen lamp of 20 watts in a G4 lamp base and a luminous flux of 320 lumens shown. A high gloss reflector surface with a reflectometer reading of over 100 was used.

In the lower illustration 5B The illuminance on the hob was measured with a low voltage halogen lamp of 20 watts in a G4 lamp base and 320 lumens of luminous flux with a matt reflector.

It can be seen that the entire illumination in the 5B is significantly darker, so only areas of L3, L4 and L5 Lux arise. Thus, the polishing or adjustment of the reflectometer value of the reflector of the illumination device, in particular in the case of a hob, results in improved illumination. Illuminance levels between 400 and 650 lux are considered desirable and higher values than particularly good. With the proposed extractor hood these values are easily accessible. In addition, particularly cheap and energy-saving bulbs can be used, which also meet the legal requirements of relevant directives.

It is thus an extractor hood created that is inexpensive to produce, requires low power and does not cause unwanted spot effects.

LIST OF REFERENCE NUMBERS

1

Hood

2

cooking

3

hotplate

4

controls

5

lighting device

6

Lamp

7

reflector

8th

lamp glass

9

light cone

10

Lamp holder

11

casing

12

straight section

13

reflector dome

14

attachment

15

Lamp axis

16

opening

17

stove

18

rivet

F

ground

W

wall

H

horizontal

B

operating side

U

bottom

α

angle

L1-L5

illuminance

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• DIN 67 530 [0005]
• EN ISO 2813 [0005]
• ISO 7668 [0005]
• DIN 67 530 [0040]
• DIN EN ISO 2813 [0040]
• ISO 7668 [0040]

Claims (15)

Extractor hood ( 1 ), in particular for a hotplate ( 2 ), with at least one illumination device ( 5 ), which a reflector ( 7 ) for a light source ( 6 ) for the lighting device ( 5 ) radiated light ( 9 ), wherein the reflector ( 7 ) has a glossy surface with a reflectometer value of over 60. Extractor hood ( 1 ) according to claim 1, characterized in that the reflectometer value is in a range between 60 and 100, in particular at an angle of incidence of 60 degrees. Extractor hood ( 1 ) according to claim 1 or 2, characterized in that the reflectometer value is in a range between 70 and 90, in particular at an angle of incidence of 60 degrees. Extractor hood ( 1 ) according to any one of claims 1-3, characterized in that the reflector ( 7 ) is at least partially made of aluminum, in particular of anodized aluminum. Extractor hood ( 1 ) according to any one of claims 1-4, characterized in that the reflector ( 7 ) is at least partially made of metallized material, in particular of silver-coated glass. Extractor hood ( 1 ) according to any one of claims 1-5, characterized in that the reflector ( 7 ) substantially dome-shaped a position of the bulb ( 6 ) partially encloses. Extractor hood ( 1 ) according to any one of claims 1-6, characterized in that the reflector ( 7 ) a straight, with proper arrangement of the hood ( 1 ) substantially vertical section ( 12 ) for a bulb holder ( 10 ). Extractor hood ( 1 ) according to any one of claims 1-7, further comprising a bulb socket ( 10 ), which is designed as a pin base for a halogen lamp, in particular as a G4, G5 or G9 socket. Extractor hood ( 1 ) according to any one of claims 1-8, characterized in that a longitudinal axis ( 15 ) of the illuminant ( 6 ) or a bulb holder ( 10 ) when the cooker hood is arranged as intended ( 1 ) relative to a horizontal (H) includes an angle (α) between 10 degrees and 20 degrees, in particular 12 degrees. Extractor hood ( 1 ) according to any one of claims 1-9, characterized in that in accordance with the intended arrangement of the extractor hood ( 1 ) for a hotplate ( 2 ) a bulb socket ( 10 ) in or on the reflector ( 7 ) relative to an operating side (B) of the cooking area ( 2 ) is arranged. Extractor hood ( 1 ) according to any one of claims 1-10, characterized in that the illumination device ( 5 ) on an underside (U) of the extractor hood ( 1 ) is arranged. Extractor hood ( 1 ) according to any one of claims 1-11, characterized in that the illumination device ( 5 ) in a housing of the extractor hood ( 1 ) is arranged. Extractor hood ( 1 ) according to any one of claims 1-12, characterized in that the illumination device ( 5 ) a transparent pane ( 8th ), in particular a lamp glass, for protecting the reflector ( 7 ) and / or a light source ( 6 ) to the outside. Extractor hood ( 1 ) according to any one of claims 1-13, characterized in that the reflector ( 7 ) and / or a diaphragm is designed such that when used as intended the extractor hood ( 1 ) for a hotplate ( 2 ), a cone of light ( 9 ) only the cooking area ( 2 ) illuminates. Method for producing an extractor hood ( 1 ) for a hotplate ( 2 ), with a lighting device ( 5 ), which a reflector ( 7 ) for a given illuminant ( 6 ) radiated light ( 9 ), detecting an illuminance (L1-L5) of the illumination device ( 5 ) with the given illuminant ( 6 ) when the cooker hood is arranged as intended ( 1 ); Adjusting a reflectometer value of a surface of the reflector ( 7 ) such that a predetermined minimum illuminance (L1-L5) at the cooking location ( 2 ) is present; wherein the fitting by machining the surface of the reflector ( 5 ), in particular by means of polishing, takes place.

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