EP3410020A1 - Extractor hood with removable filter element - Google Patents

Abstract

The present invention relates to an extractor hood which comprises a housing (11) and at least one filter element (13) which can be detachably fastened to the housing (11). The extractor hood (1) is characterized in that the extractor hood (1) has an inductive transmission device (14) and the filter element (13) has at least one electrical load, a primary coil (141) of the transmission device (14) on the housing (11). the extractor hood (1) and a secondary coil (143) on the filter element (13) is arranged and the secondary coil (143) is connected to the at least one electrical load.

Description

The present invention relates to an extractor hood with a removable filter element.

In cooker hoods in kitchens, filter elements are used to filter impurities, especially fats, from fumes and vapors sucked in by the extractor hood. In order to achieve the highest possible deposition rate of the extractor hood, the surface of the filter elements must be as large as possible. In addition, extractor hoods are usually also used to illuminate located below the hood extractor and / or a work surface. As a rule, a so-called lighting panel in the underside of the extractor hood is provided for the lighting devices. In or on this lighting panel, the lighting devices, in particular lamps or lights are arranged. The lighting panels consist of a metal sheet, are provided in the passages for the lighting devices. Other elements, such as sensors may be provided on these lighting panels.

A disadvantage of the known extractor hoods is thus that the area which is available for filtering out the impurities from the air is reduced by the lighting apertures.

The object of the present invention is thus to provide an extractor hood in which on the one hand the filter surface can be designed as large as possible and the hood can still fulfill additional functions, such as the illumination of underlying surfaces or the use of sensors.

The invention is based on the finding that this object can be achieved by integrating at least part of the components required for the additional functions in the filter element.

The object is therefore achieved by an extractor hood, which comprises a housing and at least one releasably attachable to the housing filter element. The Extractor hood is characterized in that the hood has an inductive transmission device and the filter element has at least one electrical load, a primary coil of the transmission device to the housing of the hood and a secondary coil is disposed on the filter element and the secondary coil is connected to the at least one electrical load.

The housing of the hood can also be referred to as a viewing hood. The housing constitutes the part of the extractor hood to which the at least one filter element is releasably secured. As a releasable attachment a fastening is referred to, which can be solved without tools. The filter element may for example be releasably secured to the housing by means of latching means, clamping means or the like. The extractor hood preferably has a plurality of filter elements. In the following, however, reference will be made primarily to a filter element for the sake of simplicity. If several filter elements are provided, they can all be configured the same. However, it is also within the scope of the invention that the filter elements are designed differently. The filter element, for example, represents a filter cartridge, which may have expanded metal layers as the filter medium, for example. Alternatively, however, the filter element may for example also be a so-called edge suction filter element, in which a baffle plate of the filter element forms a peripheral edge suction gap with the housing.

The extractor hood has at least one inductive transmission device. An inductive transmission device is a transforming transmission device. The transmission device preferably represents a resonance transformer. In particular, the transmission device has a primary coil and a secondary coil. The primary coil is in this case arranged on the housing of the extractor hood and the secondary coil on the filter element. The coils are arranged so that in the installed condition of the filter element in the housing of the extractor hood between the coils there is an air gap. The air gap is small and can be for example 4mm. If the primary coil is supplied with a voltage, for example a voltage of normal line frequency, an electromagnetic field is generated. In the inserted state of the filter element, the secondary coil is located at a small distance, the air gap, to the primary coil. hereby the coils are coupled and the electromagnetic field is transmitted to the secondary coil. The field induces a voltage in the secondary coil.

The primary coil thus serves to supply and, for example, at a direct current of 24V, which is applied to this, depending on the air gap 0.5A to provide 0.55A. At the output of the secondary coil, the current can be set to 1.3 A, for example. Depending on the size of the air gap and the load are at the input of a secondary coil downstream driver, for example, 9 to 15V. The primary coil and secondary coil preferably have ferrite cores with windings of a high-frequency strand. For example, the primary coil can be constructed as follows: 15 turns RF strand 90 * 0.071, 3 E cores, series resonance. The secondary coil can, for example, be constructed as follows: 8 turns HF strand 180 * 0.071, 3 E cores, parallel resonance. Such a structure may have an operating frequency of 95 kHz and an efficiency (including a downstream driver, especially LED driver) of about 70-75%, depending on the air gap and load. However, the invention is not limited to this structure.

By providing such an inductive transmission device, it is possible energy and / or data from the housing of the hood, in particular of other components that are housed in the housing or disposed on the filter element and in particular to and from the at least one electrical load transferred to. The transmission takes place without contact in the transmission device according to the invention. This has the advantage that the cooker hood is particularly safe to handle. With mechanical contacts, such as plug contacts or sliding contacts, there is the risk that the user will come into contact with these contacts. In the transmission device according to the invention, however, the transmission between the coils, and in a withdrawn from the hood filter element, the secondary coil provided therein is not energized and thus represents no danger to the user. In addition, dirty mechanical contacts in the use of the hood and their function can therefore after a certain period of operation no longer be given. Since no mechanical contacts for energy and / or data transmission are necessary in the extractor hood according to the invention, therefore, the reliable function of the transmission is guaranteed even after prolonged operation.

In addition, provision of a source of energy in the filter element is not necessary because energy required at the filter element is provided by the transfer device. Thus, for example, can be dispensed with the insertion of batteries in the filter element.

According to one embodiment, the electrical load represents a lighting device. The lighting device preferably comprises at least one light source. The light source may preferably be an LED. In addition to the at least one light source, the lighting device may comprise further components, such as a dimming unit. This embodiment has the advantage that the design of the extractor hood can be changed in a simple manner. For example, different filter elements with different colors can be used by the user. Instead of LEDs, for example, halogen lamps can also be used. Because of the comparatively low efficiency and possibly high voltage of these lights, this embodiment is not preferred. In the event of a fault, a filter element with an LED is simply interchangeable by the user of the extractor hood.

Additionally or alternatively, at least one electrical consumer may comprise a sensor. This makes it possible to integrate sensors into the filter element. The sensor or other parts of the sensor can be powered by the transmission device with power. Additionally or alternatively, however, data can also be transmitted to the sensor system by the transmission device. Finally, it is also possible to transmit data from the sensor via the transmission device to the housing of the extractor hood and in particular to components in the housing of the extractor hood, such as a control unit. The sensors can serve, for example, for controlling the extractor hood or for monitoring a hob arranged below the extractor hood. In addition, a sensor can also be used to detect the filter occupancy, that is, the filter saturation.

Additionally or alternatively, at least one electrical load may be a display unit. The display unit can also be called a display. In this embodiment, the structure of the hood further simplified.

In particular, in the case of so-called vertical diners or skewers, in which the underside of the filter elements is visible to the user, information about the display unit in the filter element can be displayed to the user, for example the set operating state of the extractor hood.

Additionally or alternatively, at least one electrical load may be an operating unit. Also in this embodiment, the structure of the hood further simplified. Particularly in the case of so-called vertical diners or skewers, in which the underside of the filter elements is visible to the user, the operating unit, which is accommodated in the filter element, can be easily reached by the user. The provision of a separate control unit on the outside of the hood, as usually used in the prior art, can be omitted.

According to a preferred embodiment, the power coupling of the transmission device, that is between the primary coil and the secondary coil only in the installed state of the filter element is present. As a result, the correct installation of the filter element can be checked in a simple manner. If, for example, lighting elements which are supplied with energy by the transmission device are accommodated in the filter element, the user can be informed by the lack of illumination that the filter element is not correctly accommodated in the extractor hood.

According to a preferred embodiment, the inductive transmission device is designed a transmission device for transmitting energy to the filter element and for transmitting data from the primary coil to the secondary coil, from the secondary coil to the primary coil or for bi-directional transmission of data between the primary coil and the secondary coil is.

According to one embodiment, the extractor hood has an illumination device exclusively on the at least one filter element. In this embodiment, it is possible to dispense with lighting panels on the hood and provide all the lighting devices on the filter elements. The space thus saved can be further filter elements or by use larger filter elements are used as a filter surface and thus the efficiency of the hood can be increased.

According to one embodiment, the transmission device has a primary side and a secondary side, in the primary side, the primary coil is present and in the secondary side are the secondary coil and a driver for an electrical load.

Preferably, the transfer device and the at least one electrical load in the filter unit are made waterproof. For example, the transfer device can be cast in water-repellent material or be accommodated in a watertight housing in the filter unit. The electrical consumers, for example LEDs, can also be accommodated in a watertight housing. This configuration makes it possible to clean the filter element in the dishwasher without damaging the transmission device and the at least one electrical load.

• Figur 1: eine schematische Darstellung einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube;
• Figur 2: ein schematisches Schaltbild einer Ausführungsform der erfindungsgemäß verwendeten Übertragungsvorrichtung;
• Figur 3: eine schematische Ansicht einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube mit gelöstem Filterelement; und
• Figur 4: eine schematische Detailansicht der Übertragungsvorrichtung der Dunstabzugshaube nach Figur 3.

The invention will be explained again below with reference to the accompanying drawings. Show it:

• FIG. 1 a schematic representation of an embodiment of the extractor hood according to the invention;
• FIG. 2 a schematic circuit diagram of an embodiment of the transfer device used in the invention;
• FIG. 3 : a schematic view of an embodiment of the extractor hood according to the invention with dissolved filter element; and
• FIG. 4 : A schematic detail view of the transmission device of the hood after FIG. 3 ,

FIG. 1 shows a schematic representation of an embodiment of the extractor hood 1 according to the invention. The extractor hood 1 has in the illustrated Embodiment a chimney 10 and a housing 11 provided below the chimney. In the bottom of the housing 11, two filter elements 13 are used. In addition, another filter element 13 is shown in the removed state. In the front area, a lighting panel 12 is provided in the bottom of the housing 11. In this lighting panel 12 lighting elements 120 are provided. In the front of the housing 11, two controls 15 are provided.

The filter element 13, which in the FIG. 1 is shown below the hood, is inserted between the two already inserted into the housing 11 filter elements 13. This filter element 13 has in the illustrated embodiment as electrical consumers two lighting devices 130, of which in FIG. 1 only each of the lighting element is visible.

In FIG. 2 a schematic diagram of one embodiment of the transfer device 14 is shown. The transmission device 14 comprises a primary side 140 and a secondary side 142. The primary side 140 consists of a primary coil 140, which is connected via a switch S to a power supply. At the primary coil 140 is at closed switch S, for example, 24V DC. The secondary side 142 consists of a secondary coil 142 and a driver 144 connected thereto. In the illustrated embodiment, the driver 144 is connected to two illumination devices 130, which have LEDs as the light source. The LEDs may preferably be arranged on a heat sink. Between the primary side 140 and the secondary side 142 and in particular between the primary coil 141 and the secondary coil 143 is an air gap L. In this embodiment, the transmission device 14 comprises, for example, a magnetically coupled resonant converter and an LED driver.

In the Figures 3 and 4 is a schematic view of an embodiment of the hood 1 shown, in which the middle of three filter elements 13 is pivoted downwards. As a result, the interior of the housing 11 and the top of the filter element 13 are visible. On the upper side of the filter element 13, the secondary side 142 of the transmission device 14 is visible. The secondary side 142, that is, the secondary coil 143 and other required electronics 1420, such as a driver 144, is inserted into the filter element 13. In addition, in the View of FIG. 3 Also see other parts of the lighting devices 130, in particular the heat sink. In the housing 11, the primary side 140 of the transfer device 14 is introduced. In particular, the primary coil 141 is fixed in the housing 11. In the illustrated embodiment, other components of the primary side electronics 1400 are shown. FIG. 4 shows the transfer device 14 from FIG. 3 in detail.

In the area of the air gap as little metal as possible is present in the assembled state. When inserted filter element, the coils are as accurate as possible with a small air gap.

The invention is not limited to the embodiments shown in the figures. Rather, other types of inductive transmission device for the transmission of energy and / or data can be used. In addition to the lighting device shown, according to the invention further electrical consumers, for example electronics, sensors, a display or an operating unit can be operated in the filter element. These consumers are, like the lighting device shown reliably supplied with the necessary operating energy. In addition, the lighting device and / or other electrical consumers in the filter element can be supplied with data from other electronics in the extractor hood which contain, for example, the necessary control information for the consumer. Finally, consumers in the filter element can send data to other electronics in the cooker hood that are necessary for proper operation of the cooker hood. For example, sensor signals or operator inputs can be transmitted.

With the present invention, an electrical load in the filter element of an extractor hood is connected to further electronic units mounted in the extractor hood itself, wherein energy and preferably bidirectional data can be transported via this connection.

The present invention has a number of advantages. In particular, if in the filter element of a cooker hood electrical consumers (electronics, sensors, lighting, display ...) to be operated, the hitherto known use of a Battery or from grinding or plug contacts for supply with the necessary operating energy no longer necessary. As a result, on the one hand, the handling of the hood and on the other security increases. The operational safety of the entire extractor hood is thus massively increased. Due to the system, the primary electronics in the extractor hood are completely earth-free and fulfill all safety requirements.

In addition, new design variants can be created at any time simply by replacing the filter elements. For example, different types of lights can be used. For example with and without dimmer. In addition, by replacing the filter elements functional variants of the hood can be generated (with / without sensors), various types of sensors for controlling the hood or to monitor the hob and the like.

The installation, that is, the insertion of the filter elements in the housing of the hood by the customer remains unchanged simple. This device variants, such as different number / type / position of lighting devices can be displayed very quickly. The optimization of inductive energy and data transmission is simple. Device development is not difficult. A simplest transmission device can, for example, transmit 10 W and has a slow data transmission. However, this may be sufficient depending on the electrical load in the filter.

With the present invention can be represented very easily and at any time a data transfer that transfers data from the hood in the filter element or from the filter element in the hood.

In addition, for example, by the installation of lighting devices, such as LED in the filter element, the available surface for the filter elements on the underside of the hood and the lighting devices can be freely positioned in the filter element.

LIST OF REFERENCE NUMBERS

1

Hood

10

fireplace

11

casing

12

lighting diaphragm

120

lighting element

13

filter element

130

lighting device

14

transfer device

140

primary

1400

electronics

141

primary coil

142

secondary side

1420

electronics

143

secondary coil

144

driver

15

operating element

L

air gap

S

switch

Claims (9)

Extractor hood comprising a housing (11) and at least one releasably attached to the housing (11) filter element (13), characterized in that the extractor hood (1) has an inductive transmission device (14) and the filter element (13) at least one electrical Consumers, a primary coil (141) of the transmission device (14) on the housing (11) of the hood (1) and a secondary coil (143) on the filter element (13) is arranged and the secondary coil (143) with the at least one electrical load connected is. Extractor hood according to claim 1, characterized in that at least one electrical load is a lighting device (130). Extractor hood according to one of claims 1 or 2, characterized in that at least one electrical load comprises a sensor. Extractor hood according to one of claims 1 to 3, characterized in that at least one electrical load is a display unit. Extractor hood according to one of claims 1 to 4, characterized in that at least one electrical load is an operating unit. Extractor hood according to one of claims 1 to 5, characterized in that the power coupling of the transmission device (14) only in the installed state of the filter element (13) is present. Extractor hood according to one of claims 1 to 6, characterized in that the inductive transmission device (14) has a Transmission device (14) for transmitting energy to the filter element (13) and transmitting data from the primary coil (141) to the secondary coil (143), from the secondary coil (143) to the primary coil (141), or for bi-directional transmission of data between the primary coil (141) and the secondary coil (143) is designed. Extractor hood according to one of claims 1 to 7, characterized in that the extractor hood (1) exclusively at the at least one filter element (13) has a lighting device (130). Extractor hood according to one of claims 1 to 8, characterized in that the transmission device (14) has a primary side (140) and a secondary side (142), in the primary side (140) the primary coil (141) is present and in the secondary side (142) the secondary coil (143) and a driver (144) for an electrical load.

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