TABLE VENTILATION DEVICE

A table ventilation device includes a filter module, an extension means, and a drive unit for motorized retraction and extension of the extension means. The drive unit is designed to move the filter module from a filter module operating position into a filter module removal position.

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Description

The invention relates to a table ventilation device which comprises a vapor extraction opening, a vapor deflection device, a fan, a filter module, an extension means and a drive unit for the motorized retraction and extension of the extension means.

In recent years, there has been a continuing trend for functional kitchen appliances which are subject to as few design constraints as possible and which nevertheless provide enhanced functionality and user-friendliness. Thus the development of extractor hoods into table ventilation devices has been particularly well received, since a considerable simplification of the design has been achieved thereby.

The target function underlying each table ventilation device is to extract vapor from the cooking region above a hob, to filter the vapor and to discharge the cleaned air into the environment. In a table ventilation device the air is extracted downwardly via a vapor extraction opening which may be provided, for example, in a recess of a worktop. Table ventilation devices generally have filters, in particular grease filters, which have to be replaced at specific maintenance intervals. In this case, grease filters are generally the first filter stage on or in the vapor extraction opening. Odor filters may be arranged as the last filter stage upstream of an air outlet of the table ventilation device. Odor filters are used, in particular, when the table ventilation device provides a circulating air mode in which the cleaned air is not discharged to the outside but inside the room in which the table ventilation device is operated.

However, this is associated with several drawbacks. Firstly, there is the problem of arranging the filters such that they are able to be reached with the least possible effort. The positioning of the table ventilation device below the worktop, which is in any case disadvantageous, is exacerbated, in particular, in the case of odor filters which are arranged at the air outlet and, in particular, downstream of a fan of the table ventilation device. Secondly, the access to filters is also impeded by the position of the table ventilation device behind the hob. Additionally, the filters are located, for example, approximately 10 cm to 20 cm below the appliance upper edge, i.e. the vapor extraction opening. These filters are only accessible from above through the narrow vapor extraction opening, which is generally only approximately 50 mm to 100 mm wide.

Thus it is an object of the present invention to provide an improved construction of a table ventilation device, which ensures improved handling for the end user.

The object is achieved by a table ventilation device as claimed in claim 1. Advantageous developments are described in the dependent claims.

The table ventilation device according to the invention comprises a vapor extraction opening, a vapor deflection device, a fan, a filter module, an extension means and a drive unit for the motorized retraction and extension of the extension means. The table ventilation device according to the invention is characterized relative to the table ventilation devices known from the prior art in that the filter module can be moved by means of the drive unit from a filter module operating position into a filter module removal position. As a result, a convenient and cost-effective removal of the filter module and, in particular, the filter of the filter module from the table ventilation device is ensured.

The vapor extraction opening, which is also denoted hereinafter as the extraction opening, forms the upper end of the table ventilation device. Preferably, the extraction opening is formed by the upper edge of a housing. The fan is arranged in the table ventilation device below the vapor extraction opening. The vapor deflection device is a device via which vapor is conducted to the vapor extraction opening. The vapor deflection device thus preferably protrudes upwardly at least temporarily beyond the vapor extraction opening.

Since known table ventilation devices are generally located behind the hob, manual intervention in the appliance is impeded or impossible to achieve without additional handling aids. In particular, the filter module and thus the at least one filter may be integrated in the operating area of the extension means, which also may be used for moving the vapor deflection device. As a result, the filters of the filter module may be lifted or extended, and also lowered or retracted again, beyond the vapor extraction opening or the appliance upper face for the removal thereof.

The term “table ventilation device” is to be generally understood to mean extractor devices, as are used for extracting cooking fumes, steam or steam loaded with grease which are produced above a hob. The fumes cited by way of example are also denoted as “vapor”. In particular, such table ventilation devices are also denoted as “downdraft” devices, i.e. as an extractor device in which the vapor is extracted downwardly. “Downwardly” in this case means below the hob surface.

Advantageously, the table ventilation device is a table ventilation device which may be operated at least temporarily in a circulating air mode. This has the advantage that the installation does not require any further measures in the surrounding building structure since, in particular, exhaust air ducts, exhaust air grilles, insulation to the external environment and the like are dispensed with. As a development, it may be advantageous if the table ventilation device is only suitable for a circulating air mode.

According to the present invention, the filter module may comprise at least one filter which may have additional fastening components, reinforcing devices or mounting connections. For example, the filter module may be a filter cassette. If a plurality of filter cassettes are required, all of the individual cassettes may be denoted together as the filter module. In this case, the term filter module encompasses all that has to be replaced relative to the filters during the maintenance of the table ventilation device. Alternatively or additionally, the filter module may also have means for collecting fluids and/or solids, namely oil pans, drip trays, grilles and the like. At least one filter of the filter module is preferably a grease filter. In this case, both an active filter and a passive filter may be used as the grease filter. In particular, the grease filter may be, for example, an expanded metal filter or an electrostatic filter. As a result, the particle separation from the vapor may be increased if required.

A “fan” within the meaning of the invention is to be understood to mean a device which is suitable for generating a pressure difference which produces a flow of vapor via the vapor extraction opening into the table ventilation device and through the filter module. The fan is preferably a radial fan.

The drive unit may be an electrical device or a device to be operated manually, which is suitable for adjusting the extension means. The extension means may comprise, for example, a linkage, a spindle nut or a further device which, in particular, may be moved upwardly or downwardly by the output of the drive unit. The filter module may be moved at least temporarily upwardly or downwardly by this movement. Alternatively or additionally, the extension means may have hydraulic and/or electrical components. The invention is described hereinafter substantially with reference to one extension means. However, according to the invention the table ventilation device may also have a plurality of extension means.

The filter module operating position is a position in which the filter module is located fully or partially inside the table ventilation device. The filter module operating position is also denoted hereinafter as the filter operating position. The filter module removal position, which is also denoted as the filter removal position, is a position in which the filter module is located fully or partially outside the table ventilation device or inside the table ventilation device adjacent to the vapor extraction opening. It is important that the filter removal position is a position suitable for changing a filter module or the filter module. Advantageously, the filter module may be located in the filter removal position above or virtually flush with a work surface upper face of a kitchen cabinet and thus the vapor extraction opening.

The filter operating position and/or the filter removal position may also encompass more than one position. Thus the term “position” may also be understood to mean the “position range”.

The filter module preferably has at least one filter which is a grease filter. According to one embodiment, the filter module additionally has at least one filter which is an odor filter. In this embodiment the approach according to the invention is based on the recognition that in contrast to established approaches, according to which odor filters are located deep in the appliance interior below the grease filter unit and, in particular, in the direction of flow downstream of the fan of the table ventilation device, the odor filter may be positioned in the vicinity of the vapor extraction opening. The inventors have also recognized that the odor filter may be specifically provided as a replaceable filter of a filter module, the position thereof being able to be changed via the drive unit, and which thus may be conveniently removed from the ventilation device.

The term “odor filter” includes filters which are suitable for filtering odor molecules out of the vapor or for removing odors in a different manner. The odor filter may also be either a passive or an active filter. For example, the odor filter may be an (active) carbon filter, a zeolite filter or a filter with a plasma source. In other words, “odor filter” is to be understood to mean a filter which a person skilled in the art generally considers as suitable for reducing the odor of the vapor when flowing through the odor filter.

Preferably, in the filter removal position the filter module may be removed from an upwardly facing vapor extraction opening, whereby the filter module may be reached for replacement in a particularly simple and ergonomic manner.

In this case, it is particularly advantageous if the filter module is releasably arranged as a whole and/or in parts on a filter module holder. During the maintenance of the table ventilation device, the installation and dismantling of the filter module may be considerably simplified by means of the filter module holder. Additionally, the complexity of the filter module itself may be reduced if the components for coupling the filter module to the extension means are arranged on the filter module holder. As a result, by means of the filter module holder, conventional filter modules may also be used for the table ventilation device according to the invention.

According to one embodiment, the vapor deflection device is movable by means of the at least one extension means from a resting position into an operating position. In this case, the vapor deflection device may preferably comprise a vapor guide plate holder and a vapor guide plate. The vapor guide plate may be arranged on the vapor guide plate holder. In particular, the vapor guide plate may be positioned on the vapor guide plate holder or inserted therein from above. Preferably, the vapor guide plate may be a glass plate. The operating position of the vapor deflection device is a position in which the vapor deflection device and, in particular, the vapor guide plate are located fully or partially outside the table ventilation device. The resting position of the vapor deflection device is a position in which the vapor deflection device and, in particular, the vapor guide plate are located fully or partially inside the table ventilation device. A “vapor deflection device” is to be understood to mean a device which promotes a conduction of cooking fumes to the vapor extraction opening. Additionally, the vapor deflection device may serve as a splash guard. It is advantageous here that the components of the table ventilation device do not protrude beyond the vapor extraction opening when the table ventilation device is not in operation. Thus the kitchen cabinet receiving the table ventilation device may be designed to be particularly unobtrusive. The provision of a glass plate has the advantage that the vapor guide plate is also unobtrusive during operation. Glass also has the advantage that it is chemically inert and no consequential damage is caused by grease deposits via the vapor flowing past.

According to one embodiment, the movement of the filter module is carried out directly via the at least one extension means. In this embodiment, it is also possible to refer to a direct coupling of the extension means to the filter module. In this embodiment, the extension means directly acts on the filter module, for example on a filter module holder. Since the extension means may be retracted and extended, i.e. lifted and lowered, by a drive of the drive unit, for example a motor, the filter module may also be lifted and lowered when the filter module is directly coupled to the extension means.

According to a further embodiment, the movement of the filter module is carried out indirectly via an intermediate element. The intermediate element, in particular, is a movable element of the table ventilation device which may be retracted and extended by the at least one extension means. Preferably, this intermediate element is the vapor deflection device. In this embodiment, the extension means, which may be moved via the drive, is not in direct contact with the filter module. Instead, the extension means is coupled indirectly to the filter module via the vapor deflection device. For this indirect coupling the filter module is temporarily connected to the vapor deflection device.

According to a preferred embodiment, the filter module is moved at least temporarily and the vapor deflection device is moved at least temporarily via the at least one extension means. By the same extension means being used for moving the filter module and the vapor deflection device, the construction of the table ventilation device is simplified. In particular, a single drive may be used, for example a single motor in the table ventilation device, in order to move either the filter module or the vapor deflection device. If the extension means via which the filter module is moved is also the same extension means via which the vapor deflection device is also moved, the construction of the table ventilation device is further simplified.

According to one embodiment, both the filter module and the vapor deflection device are moved at least temporarily at the same time via the at least one extension means.

According to one embodiment, the drive unit has a first mode in which the filter module is decoupled from the extension means and a second mode in which the filter module is coupled to the extension means. Thus all operating states of the drive unit, which provide no movement of the filter module, are encompassed by the first mode. All operating states which provide a movement of the filter module are encompassed by the second mode. For example, the second mode may be a maintenance mode in which the filter module is replaced. Similarly, the second mode may also be an operating state in which the filter module position is optimized. It is advantageous here that the drive unit and/or the extension means do not have to be duplicated but, for example, may be used both for the movement of the filter module and for the movement of the vapor deflection device. This may reduce the complexity and thus the costs, the susceptibility to error and the weight of the entire system. “Coupled” is understood to mean that a dependency is provided between the movement of the filter module and the movement of the extension means. The coupling may be formed, for example, by a stop. In general terms, the coupling may be produced by a frictional connection, a non-positive connection or a positive connection, or combinations thereof. In this case, the actual coupling never has to take place on the filter module itself but may take place, in particular, on the filter module holder or on another component. It is important that a different relative movement is present between the filter module and extension means between the first and second mode.

According to one embodiment, the filter module is temporarily connected to the vapor deflection device via a switchable driver element. In particular, this connection may be present between the filter module and the vapor deflection device in the second mode of the drive unit. Since the driver element is switchable, the connected state of the filter module and the vapor deflection device may be produced in the transition between the first mode and the second mode and cancelled again in the transition from the second mode into the first mode. The connection between the filter module and the vapor deflection device represents a rigid connection, whereby the filter module is moved by the same amount when the vapor deflection device is moved.

According to a further embodiment, the connection of the filter module to the vapor deflection device is made when reaching a connecting position of the vapor deflection device or is at least prepared when reaching this position. A previously defined switching logic, which creates or releases the connection between the filter module and the vapor deflection device depending on the position of the vapor deflection device, may be implemented by means of such a connecting position. This may take place for example mechanically, electrically and/or with the assistance of sensors. It is important that there is an association between the vapor deflection device “reaching the connecting position” and the “connection of the filter module and the vapor deflection device”. The term “prepared” takes into account that the connection does not necessarily have to take place at the same time and/or location when the vapor deflection device reaches the connecting position. Instead, in this case a logical, control-technical or mechanical measure may also be made, said measure being implemented with a further movement of the extension means for a predictable connection or a predictable release of the connection. The state in which the filter module is connected to the vapor deflection device is the state in which the filter module is indirectly coupled to the extension means.

According to a further embodiment, the connecting position corresponds to an end position of the vapor deflection device. This has the advantage that an inadvertent connection is avoided. Not least, technical arrangements for the connection may be more easily integrated in the table ventilation device, since in the end position more space is available for built-in components. The end position of the vapor deflection device, which may also be denoted as the maximum position, is to be understood to mean a position in which the vapor deflection device is extended upwardly beyond a normal operating position.

Alternatively, it may be advantageous if the connection is produced or prepared by a movement sequence of two components which are movable relative to one another, in particular the filter unit and an intermediate element, in particular the vapor deflection device. For example, it may be advantageous if the vapor deflection device is stopped when it is lowered, and raised again, and a coupling is created thereby via a passive latching element. This has the advantage that the effective stroke height of the filter module is freely selectable, depending on where the directional change of the vapor deflection device takes place.

According to one embodiment, the driver element, via which the filter module is connected to the vapor deflection device and via which the indirect coupling of the extension means to the filter module is generated, may be arranged on the filter module. Via the connection generated by the driver element, when the vapor deflection device is moved the filter module is entrained thereby. The driver element is a switchable driver element and may also be denoted as a connectable driver element. The driver element may be any device which provides a corresponding stop, in particular a pawl, a cam, a bolt, a hook or the like. The driver element in this case may be arranged on the filter module, on the filter module holder. As a result, a simple mechanical indirect coupling or decoupling of the filter module to the extension means may be carried out. Thus a conventional extension means may be used as the extension means, since no other extension means are required. The entrainment requires that the force of the extension unit and the dimensioning of the extension means is sufficient to be able to move both the vapor deflection device and the filter module.

Advantageously, the table ventilation device has a single drive unit for the motorized retraction and extension of a plurality of components, in particular of the vapor deflection device and of the filter module. As a result, a cost-effective drive which is more economical in terms of installation space may be achieved, since instead of using a plurality of individual drives, a single drive unit with means for mechanical retraction or decoupling is sufficient. As result, the filter module (odor filter, grease filter, oil collection container, liquid collection container) may be lifted without additional drive units or extension means. The filter module and, in particular, the filters may thus be moved by motor into an ergonomically favorable removal position for cleaning purposes. In addition to the drive which is saved, the effort for the electronic activation is also minimized.

It is advantageous if the filter module is positioned in the filter module operating position inside the table ventilation device on a sealing surface, wherein preferably the seal is achieved by the inherent weight of the filter module on the sealing surface. As a result, it is possible to ensure that no vapor is suctioned past the filter module.

Alternatively or additionally, it may be advantageous if the filter module is fitted in a filter slot. A sealing surface may be configured on the active surface pair of the filter module-filter slot. As a result, it may be ensured that bypass flows of vapor are avoided. Preferably, in this case the active surface pair is configured such that a relative movement between the filter module and filter slot is possible.

According to one embodiment, a latching mechanism is arranged on the filter module for connecting the vapor deflection device to the filter module. A “latching mechanism” is to be understood to mean any device which permits a mechanical connection via at least the driver element. Thus the latching mechanism may be configured such that the driver element is arranged so as to be switchable on the filter module, on the filter module holder or a further component connected to the filter module. A modular unit, which may be arranged specifically for the connection to the vapor deflection device on the filter module, may be provided by the latching mechanism. This may simplify the production and the assembly of the table ventilation device.

The latching mechanism may comprise the driver element, a switching plate, a carrier plate as well as an upper switching lever and a lower switching lever. In this case, the carrier plate may be arranged rigidly on the filter module or a component connected to the filter module and the switching plate may be arranged so as to be movable relative to the carrier plate. Preferably, in this case the switching plate may be displaced via the upper and lower switching lever relative to the carrier plate into a first and second position. Preferably, the latching mechanism forms a trapezoidal arrangement which provides two different positions. Preferably, in this case the upper switching lever and the lower switching lever are arranged on the switching plate such that when the upper switching lever is turned by means of the vapor deflection device this activates the driver element and when the lower switching lever is turned by means of the vapor deflection device this deactivates the driver element.

In this case, the latching mechanism is configured such that when the vapor deflection device passes the upper switching lever, said upper switching lever is turned thereby and a displacement of the switching plate relative to the carrier plate takes place. Preferably, as a result the driver element is switched into an activated position. The turning may be provided, for example, when the vapor deflection device is moved into an end position or a different predefined position. If the driver element has been activated, it may serve as a stop for connecting the filter module to the vapor deflection device and thus for coupling the filter module to the extension means. In this case, the connection may be achieved by the vapor deflection device moving downwardly, passing the activated driver element and only coming into engagement therewith when lifted again. For example, to this end the driver element may be pivotably pretensioned so that the vapor deflection device is able to pass this driver element when it is activated.

Alternatively or additionally, it may be advantageous that when the lower switching lever is turned by means of the vapor deflection device this deactivates the driver element. The principle is similar to the turning of the upper switching lever, only in reverse. When turned, the driver element is switched into the deactivated position via a displacement of the switching plate relative to the carrier plate. If the vapor deflection device moves upwardly again after the lower switching lever has been turned, the driver element no longer forms a stop and there is no connection of the filter module to the vapor deflection device. This permits a particularly simple, safe and user-friendly connection of the filter module to the vapor deflection device and thus an indirect coupling and decoupling of the filter module to the extension means. According to one embodiment of the invention, the user who wishes to replace the filter module, or the filter of the filter module, only has to move the vapor deflection device into an upper end position, and then lower the vapor deflection device, and when lifted again, the filter module is entrained. It is particularly advantageous if this process is stored in a system control logic and runs automatically.

Directional information such as upwardly or downwardly, unless indicated otherwise, refers to a table ventilation device in the installed state.

It is particularly advantageous if the drive unit has a drive spindle on which the extension means is movably fastened. In particular, the extension means may be displaced upwardly or downwardly, i.e. moved, by rotating the extension means on the drive spindle. According to a preferred embodiment, the drive spindle has a length which corresponds to the stroke which is required in order to move the vapor deflection device from the resting position into the operating position. Advantageously, the length is slightly greater than this stroke and is equal to the stroke which is required in order to move the vapor deflection device beyond the operating position upwardly into the end position. Since the movement path of the extension means is defined by the overall height of the entire appliance (height of the base cabinet) this overall height is frequently already fully utilized by the main movement, the extension of the vapor deflection device. In the table ventilation device according to the invention, however, by the coupling and decoupling of the filter module to the extension means, the stroke available along the length of the spindle may be used firstly for extending the vapor deflection device and secondly for extending the filter module. Thus the use of a longer spindle, which corresponds to the sum of the strokes of these two movements, is not required. Additionally, with such an embodiment of the drive spindle, it may be ensured that the extension means may be a conventional extension means per se, which does not have to be modified or only slightly modified. Costs and weight may also be saved if the drive spindle is as short as possible. One or more drive spindles which are the same or different may be present. The term drive spindles also encompasses similar-acting components, in particular hydraulic cylinders.

According to one embodiment, the drive unit has a transmitting element which is movably mounted, the coupling for the second mode taking place after the transmitting element has been moved out of the movement path of the extension means. The transmitting element transmits, in particular, in one position the movement of an extension means to the vapor deflection device. In a further position, the transmitting element serves as a blocking device for the vapor deflection device. The transmitting element may thus also be denoted as a changeover switch. In the position in which it serves as a blocking device, the transmitting element releases the extension means for moving the filter module. Thus with the pivoting of the transmitting element, the transition takes place between the first mode of the drive unit in which the extension means is decoupled from the filter module, into the second mode in which the extension means is coupled to the filter module. The changeover between these modes is able to be operated in a user-friendly, simple and safe manner, due to its design. The term “transmitting element” and/or “changeover switch” is to be understood to mean in the broadest sense a body which may form a stop for the vapor deflection device. The stop has to be present in this case at least in the case of the blocking.

Advantageously, the transmitting element is mounted in a guide such that said transmitting element pivots out when an interruption of the guide is reached and at the same time forms the stop for the vapor deflection device and releases a path for the extension means in the guide. A “transmitting element” is understood to mean a body via which a force transmitting element from the extension means to the vapor deflection device is permitted. Preferably, the transmitting element is pivotably mounted and thus arranged in a guide such that in a position in which the guide is interrupted the changeover switch pivots outwardly. The latter may be the case, for example, when the vapor deflection device is in a previously defined position. Preferably, the transmitting element may be moved in the guide by the extension means and, with a continuing operation of the extension means after pivoting the transmitting element outwardly, the extension means may move past the transmitting element and come into contact with the filter module. The filter module may then be extended upwardly by the extension means. The extension means, for example, may be a drive spindle nut. In the state in which the extension means in the guide moves past the transmitting element, the extension means prevents the transmitting element from pivoting back into the guide.

Alternatively or additionally, it is advantageous if the table ventilation device also has an extraction opening cover which is closed in a switched-off state of the table ventilation device, wherein an extension of the extension means, i.e. a movement of the extension means upwardly, causes the extraction opening cover to be moved into an open position. The closing of the extraction opening in the switched-off state of the table ventilation device has the advantage that firstly the filter is protected from moisture, dust and dirt from the environment. Secondly, the kitchen cabinet receiving the table ventilation device may thus be designed particularly unobtrusively. The construction of the table ventilation device is further simplified by the extraction opening cover being moved by the extension means.

According to one embodiment, the extraction opening cover is pretensioned. The pretensioning may be selected here such that the pretensioning promotes a closed position of the extraction opening cover. Alternatively, the pretensioning may be selected such that it promotes an open position of the extraction opening cover. It is important that the extraction opening cover is open when the extension means is extended. The pretensioning has the advantage that the movement of the extraction opening cover is always ensured in the pretensioned direction. As a result, a simple actuation of the extraction opening cover may be achieved.

Advantageously, the extraction opening cover is pretensioned via a spring. This ensures a long-lasting pretensioning with a linear spring constant and at the same time low costs.

According to a preferred development, the table ventilation device has only a single drive unit which permits three movements, in particular 1. opening the extraction opening cover which closes the table ventilation device when the table ventilation device is switched off; 2. extending the vapor deflection device which deflects the extraction of the cooking fumes to the vapor extraction opening and serves as a splash guard; and 3. extending the filter elements for removal and for cleaning.

Exemplary embodiments of the invention are described hereinafter with reference to the figures. In this case schematically:

FIG. 1: shows a table ventilation device according to the invention in a cross-sectional view according to a first embodiment;

FIG. 2A and FIG. 2B: show detailed views of a latching mechanism for a table ventilation device according to the invention according to the first embodiment as a cross-sectional view of two operating states;

FIGS. 3A to 3F: show detailed views of a latching mechanism for a table ventilation device according to the invention according to the first embodiment as a perspective view of six different operating states;

FIGS. 4A to 4E show the table ventilation device according to the invention according to the first embodiment as a cross-sectional view of five different operating states;

FIGS. 5A to 5E: show the table ventilation device according to the invention according to a second embodiment as a cross-sectional view of five different operating states;

FIGS. 6A to 6E: show the table ventilation device according to the invention according to the second embodiment as a cross-sectional view of five different operating states, showing the positions of a passive latching element in the respective operating states;

FIGS. 7A to 7F: show the table ventilation device according to the invention according to a third embodiment as a cross-sectional view of six different operating states; and

FIGS. 8A to 8C: show the table ventilation device according to the invention according to the third embodiment as a cross-sectional view of different operating states, showing the positions of a decoupling and locking mechanism in three exemplary operating states.

In FIG. 1 a simplified cross-sectional view of a first embodiment of the table ventilation device is shown. The table ventilation device has a vapor extraction opening 14 which in the embodiment shown forms the upper end of the table ventilation device 10. The vapor extraction opening 14 preferably extends in the width direction of a hob, not shown, behind the rear edge of the hob. Preferably, the width of the vapor extraction opening 14 corresponds to the width of the hob. The housing 69 of the table ventilation device 20 extends downwardly from the vapor extraction opening 14.

The fan 18 is provided in the housing 69 in the lower region. A vapor deflection device 16 and a filter module 20 are provided in the upper region of the housing 69 in the embodiment shown. The vapor deflection device 16 has in the embodiment shown a vapor guide plate 34 which extends in the width direction of the table ventilation device 10 and preferably is a glass plate. The vapor guide plate 34 is located in the rear region of the table ventilation device 10, in particular adjacent to the rear edge of the vapor extraction opening 14. The vapor guide plate 34 is located in the vertical direction. The vapor guide plate 34 in the embodiment shown is held by a vapor guide plate holder 32. Preferably, the vapor guide plate 34 is held on the lateral edge thereof by the vapor guide plate holder 32. A filter module 20 is arranged adjacent to the vapor deflection device 16, in particular offset to the front. The filter module 20 also extends in the width direction of the table ventilation device 10 and is arranged parallel to the vapor guide plate 34. The filter module 20 has in the embodiment shown two filters, in particular a grease filter 30 and an odor filter 26. The grease filter 30 is arranged in the filter module 20 above the odor filter 26. The grease filter 20 may be positioned on the odor filter 26 or may be connected in a different manner thereto. The filter module 20 has in the embodiment shown a filter module holder 28. In the embodiment shown a sealing plane 62, which may also be denoted as a sealing wall, is provided in the interior of the housing 69. The sealing plane 62 extends in the horizontal direction and is provided at such a height that the upper edge of the filter module 20, in the state in which the filter module 20 is positioned on the sealing plane 62 with the lower edge, in particular the lower edge of the filter module holder 28, is located below the vapor extraction opening 14. The extraction opening cover 12 is shown in FIG. 1 in the open state in which said extraction opening cover 12 is located in the housing 69, in particular in the front region of the housing 69 in the vertical direction below the vapor extraction opening 14.

The table ventilation device 10 has a drive unit 22, only a connecting shaft thereof being able to be seen in FIG. 1, said connecting shaft connecting two drive spindles 48 which are arranged in the lateral regions of the table ventilation device 10. In the embodiment shown, the shaft and thus the drive spindles are driven by a motor 70.

The first embodiment of the invention, which is shown in FIG. 1, provides short drive spindles 48 (only shown in dashed lines in FIG. 1) for an extension means (not visible). Accordingly the drive spindle 48 has a length L which corresponds at least to the stroke xW which is required in order to move the vapor deflection device 16 from a resting position WR into the operating position WA shown in FIG. 1. Preferably, in the case of the short working spindles 48, the short lifting path thereof is repeatedly used by a switchable latching hook/coupling mechanism (see FIGS. 2A and 2B) which may be denoted as the latching mechanism 38 and is described below in more detail. As a result, the filter module 20 may be moved if required beyond the appliance boundary, in particular beyond the vapor extraction opening 14. In the embodiment shown, the length L of the drive spindles 48 is greater than the stroke xW. Thus an end position WM of the vapor deflection device 16 may be achieved by the drive spindle 48.

When actuating the drive unit 22 the filter module 20 and/or the vapor deflection device 16 are moved upwardly via the vapor extraction opening 14. In the illustration shown in FIG. 1, the vapor deflection device 16 is moved from a resting position WR into an operating position WA by the stroke xW of the vapor deflection device 16.

FIG. 2A shows an embodiment of a latching mechanism 38 in an installed situation according to the first embodiment of the invention in a first operating position. This operating position corresponds to the first mode, namely the state in which the extension means (not shown) is not indirectly coupled to the filter module 20. The latching mechanism 38 is arranged on the filter module 20. More specifically, the latching mechanism 38 is arranged on a filter module holder (not shown). The latching mechanism 38 comprises a driver element 36, a switching plate 40, a carrier plate 42 as well as an upper switching lever 44 and a lower switching lever 46. In the variant illustrated, the carrier plate 42 is rigidly fastened to the filter module (not shown). The switching plate 40 is displaceably mounted on the carrier plate 42, and the upper switching lever 44, the lower switching lever 46 and the driver element 36 are pivotably mounted thereon. As a result, a substantially trapezoidal suspension is achieved. The switching plate 40 also engages in the driver element 36 such that a movement of the switching plate 40 relative to the carrier plate 42, caused either via the upper switching lever 44 or the lower switching lever 44, leads to a switching, i.e. activation or deactivation, of the driver element 36.

FIG. 2B shows the latching mechanism 38 according to FIG. 2A in an installed situation according to the first embodiment of the invention in a second operating position. This operating position corresponds to the second mode, namely the state in which the drive unit (not shown) is coupled to the filter module indirectly via the vapor deflection device. According to FIG. 2B the upper switching lever 44 is actuated when it is turned. It is only possible to turn the switching lever 44 upwardly, since the switching plate 40 is already in the stop at the bottom. If the vapor deflection device 16 now moves from bottom to top past the upper switching lever 44—along the filter module 20 which is not connected to the vapor deflection device 16—this switching lever pivots upwardly and at the same time entrains the switching plate 40 which as a result switches the driver element 36 into an activated position. The turning occurs when the vapor deflection device 16 is moved into an end position WM which may also be denoted as the connecting position WVer. By the turning, the indirect coupling of the extension means 24 to the filter module 20 is prepared, since a return of the vapor deflection device 16 below the activated driver element 16 produces a stop for the vapor deflection device 16 on the driver element 36 which, with renewed lifting of the vapor deflection device 16, leads to an engagement in which the filter module 20 is entrained by the vapor deflection device 16. The driver element 36 may at the same time be spring-loaded, so that in the activated state the traveling over by the vapor deflection device 16 pushes this driver element temporarily inwardly and, after the vapor deflection device 16 has passed by, the driver element 36 deflects again in order to provide the stop. Similarly, the driver element 36 may be deactivated by the vapor deflection device 16 being moved into a lower extreme position in which said vapor deflection device turns the lower switching lever 46. As visible from FIG. 2A, this may be the case only when the driver element 36 is activated and thus the lower switching lever 46 also correspondingly protrudes from the switching plate 40.

The different switching processes according to the first embodiment are illustrated with reference to FIGS. 3A to 3F. The latching mechanism 38 which is switched via a movement of the vapor deflection device 16 is shown. More specifically, the switching takes place in FIGS. 3A to 3F via a vapor guide plate holder 32 which moves along the filter module 20, i.e. is moved relative thereto.

FIG. 3A shows a state which corresponds to a closed position of the table ventilation device 10. The vapor deflection device 16 is located with the stroke xW=0 in the resting position WR of the vapor deflection device 16. In this position the lower switching lever 46 must be deactivated forcibly, since the vapor deflection device 16 is directly adjacent to this lower switching lever. As a result, the driver element 36 is in a deactivated position and the upper switching lever 44 is in an activated position, i.e. deflected position.

FIG. 3B shows the vapor deflection device 16 in an operating position WA which is located just below the upper switching lever 44. Only when the vapor deflection device 16 is moved further upwardly above this operating position and thus into a maximum position, FIG. 3C, is the upper switching lever 44 turned and as a result the driver element 36 is activated via the switching plate 40. In this state of the connecting position WVer, which in this case also represents an end position WM of the vapor deflection device 16, the indirect coupling of the extension means (not shown) to the filter module 20 is prepared. This means that with a further movement of the vapor deflection device 16 this will cause an indirect coupling of the filter module 20 to the extension means. As a result, the drive unit 22 is switched from a first mode into a second mode.

The connection of the filter module 20 to the vapor deflection device 16 takes place in a manner which is offset spatially and chronologically, namely when the vapor deflection device 16 initially travels over the pretensioned activated driver element 36 as illustrated in FIG. 3D, then moves below said driver element, as illustrated in FIG. 3E and then comes into engagement therewith, as illustrated in FIG. 3E.

As a result, starting from this state a lifting of the vapor deflection device 16 leads to the filter module 20 being entrained by the vapor deflection device 16. In order to return to the starting point, as illustrated in FIG. 3A, the vapor deflection device 16 only has to be moved back into the resting position WR according to FIG. 3A.

In the event that the connection has been inadvertently prepared, namely by an inadvertent movement of the vapor deflection device 16 into the connecting position WVer, the prepared coupling may be reversed by returning the vapor deflection device 16 into the resting position WR.

Examples of stroke heights of the extension means are specified in Table 1:

TABLE 1 Position of Stroke Upper Lower vapor deflection height switching switching See device [mm] lever Driver element lever FIG. Resting position 0 activated deactivated deactivated 3A WR Operating 200 activated deactivated deactivated 3B position WA Connecting 265 deactivated activated activated 3C position WVer Travel over 100 deactivated activated (temporarily activated 3D activated driver deactivated against element spring pretensioning) Travel below 80 deactivated activated activated 3E driver element Coupling of 90 deactivated activated activated 3F driver element Filter removal 265 deactivated activated activated 3F position FE

In the example shown in Table 1, the filter module holder may be moved upwardly by 175 mm. All of the specified lengths are to be understood to be purely by way of example and are not intended to be understood as limiting the invention thereto.

FIGS. 4A to 4E illustrate the aforementioned operating states of the first embodiment of the table ventilation device 10 in combination with the switching positions of the extraction opening cover 12. In the resting position WR according to FIG. 4A the extraction opening cover 12 is located in the horizontal direction and fully covers the vapor extraction opening 14. The filter module 20 is positioned on a sealing plane 62. After switching on the table ventilation device 10 the vapor deflection device 16 moves upwardly, driven by the drive unit 22. The drive unit 22 in this case is connected to a movement device 58, only the bearing point thereof being illustrated schematically in FIGS. 4A to 4E. The bearing point of the movement device 58 is moved downwardly by the drive unit 22. The connection between the drive unit and the movement device 58 may be provided, for example, via a pin guided in a rail and a spring which is connected to the pin. The components of this connection and the movement device 58 are not shown in FIGS. 4A to 4E. By the bearing point being displaced downwardly, the extraction opening cover 12 pivots from the horizontal direction into an inclined position in which the front end of the extraction opening cover 12 is located below the plane of the vapor extraction opening 14. The filter module 20 is located as before on the sealing plane 62. This state shown in FIG. 4B corresponds to an exemplary stroke x<75 mm of a drive spindle nut (not illustrated). FIG. 4C shows the vapor deflection device 16 in the connecting position WVer with a height of, for example, 265 mm. By the further extension, the bearing point of the movement device 58 is moved further downwardly. The extraction opening cover 12 is fully opened in this position and located in the vertical direction in the interior of the housing 69. Subsequently, in this position the driver element, not illustrated, is activated. As before, the filter module 20 is located on the sealing plane 62. In FIG. 4D the vapor deflection device 16 is located in a position below the activated driver element 36 (see FIG. 3E) shortly before the coupling between the drive unit 22 and the filter module 20. Up to the point of coupling, namely when the vapor deflection device 16 has a stroke x of for example 90 mm, the filter module 20 is located on the sealing plane 62. If the vapor deflection device 16 is moved further upwardly from the position shown in FIG. 3D, the vapor guide plate holder 32 comes into engagement with the driver element 36 which is pivoted out as shown in FIG. 3F, and as a result pulls the filter module 20 upwardly therewith. FIG. 4E shows the filter module 20 in a filter module removal position FE.

In the first embodiment which has been described, the latching mechanism 38 is arranged on the filter module 20 and may be entrained via a driver element 36 by the vapor deflection device 16. Alternatively, however, the latching mechanism 38 may also be arranged on the vapor deflection device 16 and entrain the filter module 16 via a driver element 36. The latching mechanism 38 may be configured to be approximately the same for both alternatives.

FIGS. 5A to 5E and 6A to 6E disclose a second embodiment of the table ventilation device 10 according to the invention. According to this embodiment—as in the first embodiment—a short drive spindle (not illustrated) is provided. The connection of the filter module 20 to the vapor deflection device 16, however, does not take place via a latching mechanism 38 according to the first embodiment but via a passive latching element 66 (see FIG. 6A to 6E) which permits a mechanical latching or hooking of the vapor deflection device 16 to the filter module 20. In FIGS. 6A to E the movement of the passive latching element 66 is shown schematically adjacent to the table ventilation device 10. The passive latching element 66 is a driver element which is provided on the vapor deflection device 16. From a latching element initial position RA, the passive latching element 66 may be guided in a sliding guide, and an extension movement of the vapor deflection device 16 follows without having to couple the filter module 20 to the extension means 24. The latching element 66 is latched in the filter module 20 only when the vapor deflection device 16 is partially retracted and extended again. The latching element 66 in this case is clamped to the filter module 20 and entrains said filter module therewith.

As shown in FIGS. 5A to 5E, different operating states are possible. In the resting position WR of the vapor deflection device 16 according to FIG. 5A the extraction opening cover 12 is closed. In addition to the use of a passive latching element 66, the second embodiment of the table ventilation device 10 differs from the first embodiment in that the filter module 20 is arranged in a filter module operating position FA inside a filter slot 68. The filter slot 68 serves for guiding the air through the filter module 20. In a second operating position according to FIG. 5B, the vapor deflection device 16 is located in an operating position WA at a stroke height of, for example, 235 mm. The filter module 20 is, in this case as before, in its initial position, the filter module operating position FA. The extraction opening cover 12 is open in this operating state. According to a third operating state illustrated in FIG. 5C, the vapor deflection device 16 is fully extended to a stroke height of, for example, 265 mm. At the same time, the filter module 20 is lifted sufficiently far that it terminates flush with an upper face of the table ventilation device 10, in particular the vapor extraction opening 14. In a fourth operating state according to FIG. 5D, the vapor deflection device 16 is in a partially lowered position and is latched via the passive latching element 66 in the filter module 20. The partially lowered position may correspond, in particular, to a stroke height of 80 mm. FIG. 5E shows a fifth operating state. In this operating state the filter module 20 is in a filter removal position FE. The stroke height corresponds, for example, to 265 mm. As a result of the strokes x cited by way of example, the filter element 20 according to the second embodiment may be lifted, for example, by up to 155 mm.

In FIGS. 6A to 6E the operating states according to FIGS. 5A to 5E are illustrated in connection with the passive latching element 66. Using FIGS. 6A and 6B it may be seen that in normal operation of the table ventilation device 10 during the lowering of the vapor deflection device 16 the passive latching element 66 is moved along the filter module 20 with the movement direction of the vapor deflection device 16. At the lowest point, the passive latching element 66 is tilted in a direction away from the filter module 20. The third operating state according to FIG. 5C and FIG. 6C is reached in that, from a stroke height of a stroke x˜235 mm, the passive latching element 66 is tilted when moved upwardly in the direction of the filter element 20, whereby the filter module 20 is clamped to the passive latching element 66. When moved downwardly, below the stroke height of a stroke x˜235 mm, the filter module 20 is again in its filter module operating position FA, whereby the clamping is released. When the vapor deflection device 16 is moved downwardly, the filter module 20 may be coupled to the drive unit 22 with any stroke x, whereby the drive unit 22 is switched from a first mode into a second mode. This coupling takes place by stopping and extending the vapor deflection device 16 again, whereby the vapor deflection device 16 is clamped with the filter module 20 and said filter module is entrained upwardly by the vapor deflection device 16, as illustrated in FIGS. 6D and 6E.

FIGS. 7A to 7F and 8A to 8C disclose a third embodiment of the table ventilation device 10 according to the invention. The table ventilation device 10 according to the third embodiment has a drive spindle 48, the length L thereof being sufficient in order to move both the vapor deflection device 16 and the filter module 20. The coupling for the second mode takes place according to the third embodiment after a transmitting element, which is also denoted as changeover switch 50, has changed its position. In general terms, the changeover switch 50 is suitable for changing over the force transmitting element from the extension means 24 such that the filter module 20 is driven or extended instead of the vapor deflection device 16. As a result, a tractive drive is no longer present, but rather a direct drive of the filter module 20 via the extension means 24 of the drive unit 22.

FIG. 8A shows the table ventilation device 10 in an extended state. In this state the vapor deflection device 16 is in a resting position WR and the filter module 20 is in a filter module operating position FA. The drive unit 22 drives the vapor deflection device 16 via the extension means 24 and the changeover switch 50, as soon as the table ventilation device 10 transfers to an operating state, namely as illustrated in FIG. 7B. The force transmitting element in this case takes place via the drive spindle 48 which in turn drives the changeover switch 50 and the vapor deflection device 16 via a drive spindle nut 64. The changeover switch 50 in this case is arranged inside a guide 52. The filter module 20 has a filter cross member 60. A grease filter 30 is arranged above the filter cross member 60 in the direction of the vapor extraction opening 14. The odor filter 26 is arranged below the filter cross member 60. The drive spindle 48 drives the drive spindle nut 64 and the changeover switch 50 until the changeover switch 50 reaches an interruption 54 of the guide 52 in the extension direction and pivots to the side into the interruption 54. This lateral pivoting-out is achieved in the example shown by an eccentric mounting of the changeover switch 50 inside the guide 52.

The force equilibrium on the changeover switch 50 may be illustrated as follows. A vertical force from the drive spindle nut 64 acts at the bottom on the changeover switch 50. Since the changeover switch 50 is eccentrically mounted in the guide 52, the vertical force from the drive spindle nut 64 brings about a torque on the changeover switch 50, which brings this into contact with the guide 52. A lateral force is generated via the contact with the guide 52, which prevents a pivoting of the changeover switch 50. As soon as the contact is present between the changeover switch 50 and the guide 52, the force equilibrium results in a vertical displacement or stroke change, since the changeover switch 50 is mounted in the guide 52 in a vertically-adjustable manner. If the lateral force disappears, namely at an interruption 54 of the guide 52, then the torque on the changeover switch 50 causes the changeover switch to pivot out.

The components which are essential for the changeover, namely the changeover switch 50, the guide 52 and the interruption 54, are defined in their entirety as the decoupling and locking mechanism 70. The decoupling and locking mechanism is designed such that, when the changeover switch is pivoted out, a path is released for the drive spindle nut 64 and at the same time the vapor deflection device 16 is blocked. The locking mechanism 70 is also designed such that a return of the drive spindle nut 64 below the interruption 54 causes the changeover switch 50 to pivot out.

The coupling for the second mode takes place when the changeover switch 50 is pivoted out when it reaches an interruption 54 of the guide 52, and at the same time forms a stop 56 for the vapor deflection device 16, thereby blocking said vapor deflection device and releasing a path in the guide 52 for the extension means 24. By releasing the path for the extension means 24, in the exemplary embodiment shown the drive spindle nut 64 may strike against the filter cross member 60 and thus extend the filter module 20, see FIGS. 7E and 7F.

In other words, a possibility which provides a longer drive spindle 48 with a decoupling and locking mechanism 70 is provided thereby to move the filter module 20, in particular the filter cassette, out of the vapor extraction opening 14 of the table ventilation device 10. In this case, the vapor deflection device 16, in particular the glass pane, is decoupled in its upper end position from the drive unit 22 and at the same time locked so that for the additional path only the filter module 20, in particular the filter cassette, is moved.

In an embodiment not illustrated, the filter module may provide a filter receiver in a separate cross member. In particular, the grease filter 30 with the oil pan and the active carbon filter (odor filter 26) may be received by a respectively separate cross member. In this case, the receiving cross member may be guided in the side parts, so that the filter modules may be moved flexibly in the vertical direction. Alternatively or additionally, cross members for a glass pane or light diffuser may be decoupled. The glass receiving cross member in this case is guided in the side parts.

Irrespective of the embodiments cited above, the individual elements i) extraction opening cover 12; ii) vapor deflection device 16, in particular vapor guide plate holder 32 or the vapor guide plate 34; and iii) filter module 20 may be mechanically coupled.

In this case, the extraction opening cover 12 may be opened via a spring. For closing the extraction opening cover 12, for example, the glass pane may be lowered and the extraction opening cover 12 closed against the spring force via a cover driver element. The glass pane in this case may be positioned either only by its inherent weight on the vapor guide plate holder, which may also be denoted as the glass pane driver element of the drive spindle, or is mechanically fixedly connected thereto in the lifting direction so that the glass pane always moves together with the glass pane driver element. The filter module 20 is positioned, for example, only by the inherent weight thereof and separately guided in the table ventilation device 10, and is lifted if required by mechanically switchable coupling elements by the driver element of the drive spindle or by suitable force transmitting element via the vapor guide plate holder 32, in particular the glass pane receiver. If the vapor deflection device 16 is lowered, the drive unit 22 may hold the extraction opening cover 12 closed against a spring force. Thus when the vapor deflection device 16 is extended, the extraction opening cover 12 may be opened by the spring force.

LIST OF REFERENCE NUMERALS

  • FA Filter module operating position
  • FE Filter module removal position
  • L Length
  • RA Latching element initial position
  • S Direction of flow
  • WA Operating position of vapor deflection device
  • WM End position of vapor deflection device
  • WR Resting position of vapor deflection device
  • Wver Connecting position
  • x Stroke
  • xW Stroke of vapor deflection device
  • 10 Table ventilation device
  • 12 Extraction opening cover
  • 14 Vapor extraction opening
  • 16 Vapor deflection device
  • 18 Fan
  • 20 Filter module
  • 22 Drive unit
  • 24 Extension means
  • 26 Odor filter
  • 28 Filter module holder
  • 30 Grease filter
  • 32 Vapor guide plate holder
  • 34 Vapor guide plate
  • 36 Driver element
  • 38 Latching mechanism
  • 40 Switching plate
  • 42 Carrier plate
  • 44 Upper switching lever
  • 46 Lower switching lever
  • 48 Drive spindle
  • 50 Changeover switch
  • 52 Guide
  • 54 Interruption
  • 56 Stop
  • 58 Movement device
  • 60 Filter cross member
  • 62 Sealing plane
  • 64 Drive spindle nut
  • 66 Passive latching element
  • 68 Filter slot
  • 69 Housing
  • 70 Motor

Claims

1.-14. (canceled)

15. A table ventilation device, comprising:

a filter module;
an extension means; and
a drive unit for motorized retraction and extension of the extension means, said drive unit being designed to move the filter module from a filter module operating position into a filter module removal position.

16. The table ventilation device of claim 15, further comprising a filter module holder for releasable arrangement of the filter module as a whole and/or in parts.

17. The table ventilation device of claim 15, wherein the filter module includes a grease filter.

18. The table ventilation device of claim 17, wherein the filter module additionally includes an odor filter.

19. The table ventilation device of claim 15, further comprising a vapor deflection device movable by the extension means from a resting position into an operating position, said vapor deflection device comprising a vapor guide plate holder and a vapor guide plate which is arranged on the vapor guide plate holder.

20. The table ventilation device of claim 19, wherein the vapor guide plate is a glass plate.

21. The table ventilation device of claim 15, wherein the filter module is moved directly via the extension means or indirectly via an intermediate element.

22. The table ventilation device of claim 21, wherein the intermediate element is a vapor deflection device which is movable by the extension means from a resting position into an operating position.

23. The table ventilation device of claim 19, wherein the filter module is moved at least temporarily and the vapor deflection device is moved at least temporarily via the extension means.

24. The table ventilation device of claim 23, wherein both the filter module and the vapor deflection device are moved at least temporarily at a same time via the extension means.

25. The table ventilation device of claim 15, wherein the drive unit includes a first mode in which the filter module is decoupled from the extension means and a second mode in which the filter module is coupled to the extension means.

26. The table ventilation device of claim 19, further comprising a switchable driver element via which the filter module is temporarily connected to the vapor deflection device.

27. The table ventilation device of claim 26, wherein the filter module is connected or at least prepared for connection to the vapor deflection device when reaching a connecting position of the vapor deflection device.

28. The table ventilation device of claim 27, wherein the connecting position corresponds to an end position of the vapor deflection device.

29. The table ventilation device of claim 26, further comprising a latching mechanism arranged on the filter module for connecting the vapor deflection device to the filter module, said latching mechanism comprising the driver element, a switching plate, an upper switching lever and a lower switching lever, wherein the upper switching lever and the lower switching lever are arranged on the switching plate such that the driver element is activated when the upper switching lever is turned by the vapor deflection device and the driver element is deactivated when the lower switching lever is turned by the vapor deflection device.

30. The table ventilation device of claim 19, wherein the drive unit comprises a drive spindle on which the extension means is movably fastened, said drive spindle having a length which corresponds to a stroke required to move the vapor deflection device from the resting position into the operating position.

31. The table ventilation device of claim 25, wherein the drive unit comprises a transmitting element which is movably mounted, wherein the filter module is coupled to the extension means in the second mode of the drive unit after the transmitting element has been moved out of a movement path of the extension means.

32. The table ventilation device of claim 31, wherein the transmitting element is designed to block the vapor deflection device and to release the extension means for moving the filter module, when the transmitting element assumes a position out of the movement path.

33. The table ventilation device of claim 31, further comprising a guide, said transmitting element being mounted in the guide such that the transmitting element pivots out when an interruption of the guide is reached and at the same time forms a stop for the vapor deflection device.

34. The table ventilation device of claim 15, further comprising an extraction opening cover which is located below a vapor extraction opening and pivotable by the extension means from a vertical open position in which the extraction opening cover is moved upon extension of the extension means, to a horizontal closed position in which the vapor extraction opening is covered and the table ventilation device is switched-off, said extraction opening cover being pretensioned.

Patent History
Publication number: 20220275949
Type: Application
Filed: Aug 5, 2020
Publication Date: Sep 1, 2022
Inventors: Ralf Wadlinger (Hockenheim), Carsten Schweinebart (Karlsruhe), Nicolas Riedinger (Bretten), Ulmar Neumann (Forst)
Application Number: 17/632,514
Classifications
International Classification: F24C 15/20 (20060101);