Extractor hood and cooktop with an extractor hood

Abstract

Extraction device (2) for arrangement in a hob plane (11), which has a vertically upwardly movable extraction duct from the hob plane (11) with at least one extraction opening (25) arranged therein for the purpose of extracting cooking fumes, and wherein the at least one extraction opening (25) of the extraction device (2) is movable into an extended position above the hob plane (11) and into an inactive rest position below the hob plane (11), characterized by that the extractor fan (2) is a stationary device fixed in the hob plane (11) The base element (21) comprises one or more intermediate elements (22) and an extraction element (23), wherein the extraction element (23) closes off the extractor hood (2) within or above the hob level (11) and wherein at least one extraction opening (25) is arranged on the lateral circumference of the extraction element (23). and that the intermediate elements (22) and the suction element (23) are designed as concentrically arranged ring elements and are movably connected to each other.

Description

[0001] The invention relates to a cooker hood device which has a vertically upwardly movable extraction duct from the hob plane with at least one extraction opening arranged therein for the purpose of extracting cooking fumes, and wherein the at least one extraction opening of the cooker hood device is movable into an extended position above the hob plane and into an inactive rest position within or below the hob plane.

[0002] German patent DE 10 2010 042 436 A1 discloses a cooktop extractor integrated into a hob, located in the rear of the hob and designed to extend vertically from the hob. The disadvantage of such a cooktop extractor located in the rear side area is that the actual extraction mechanism is relatively far from the cooking zones, which are typically located in the front of the hob. Even a high-performance fan will not be able to effectively capture the cooking and frying fumes that develop in the front of the hob.

[0003] US Patent 2,674,991 A describes a range hood that is centrally located in the cooktop. The range hood consists of two telescopically connected pipe sections, one of which is rigidly fixed and secured within the cooktop, while the other is movably and extendably mounted within it. The extendable pipe section has vents in its upper portion through which cooking fumes can be extracted when the range hood's fan is switched on. A disadvantage of this design is that a relatively long component is required for the movable pipe section to extract fumes from different heights above the cooktop. This necessitates a considerable amount of clearance below the cooktop surface when the range hood is in its resting position, which is not available in most cases.

[0004] Publication CN 1 02 353 077 A also discloses a cooktop with a ventilation system, wherein a channel for capturing the vapors above the cooktop surface can be telescopically extended upwards from the plane of the cooktop surface.

[0005] Document US 2 404 530 A describes a telescopic tube for an internal combustion engine, through which the exhaust gases of the internal combustion engine are discharged.

[0006] Furthermore, a cooktop extraction system is known from German patent application DE 20 2008 013 350 U1. This system has no extendable components and is fixed in a central position on the cooktop. In this embodiment, all components of the extraction system, such as the fan, filter, and exhaust ducts, must be housed below the cooktop, for which the available space is usually not available in a fitted kitchen.

[0007] A powerful fan is intended to create a strong crossflow above the cooktop's integrated vent, thus extracting cooking fumes from pots and pans during cooking and frying. The crossflow should be stronger than the rising speed of the cooking fumes, but this doesn't always work ideally, especially when using large pots above a certain height. Another disadvantage is that the cover over the vent in the cooktop must have intake openings through which small particles can fall into the vent below.

[0008] The invention therefore aims to provide a cooktop with an integrated extractor hood, avoiding the disadvantages known from the prior art and enabling a space-saving design.

[0009] According to the invention, this problem is solved by a ventilation device of the type described above, having the features of claim 1, and a cooktop with such a ventilation device according to claim 10. Advantageous embodiments and further developments of the invention are set forth in the following dependent claims.

[0010] The advantages achievable with the invention consist in particular in that an integrated extractor hood can be provided in a cooktop which, despite extremely variable height adjustability between its inactive rest position and the maximum possible extension position, requires only a relatively small installation space in or below the cooktop.

[0011] This is primarily achieved through a ventilation system consisting of several concentrically arranged ring elements that are slidably connected to one another. This allows the ring elements to be nested inside each other in a space-saving manner when inactive, while in the extended position they can be adjusted to different heights for extracting the cooking fumes.

[0012] A preferred embodiment provides that the extractor hood comprises a base element fixed in the cooktop, one or more intermediate elements, and an extraction element, which closes off the extractor hood at its upper end with a closed cover. The extraction element has two ends. The lower end is connected to an intermediate element. The end of the extraction element opposite the lower end and furthest from the intermediate element is referred to as the upper end. According to the invention, the intermediate elements and the extraction element are designed as concentrically arranged ring elements that are slidably relative to one another. Extraction openings are arranged on the circumference of the extraction element in the upper section. In a preferred embodiment, the extraction openings are directed towards the cooking zones in the cooktop.

[0013] The diameter of the opening in the base element, as well as the diameters of the intermediate elements and the extraction element, are designed such that these ring elements can be inserted into the base element to assume their resting position. The nesting of the elements is achieved by ensuring that the upper ring element in each extended position has a smaller diameter, allowing it to be inserted into the lower, subordinate ring element. Therefore, in the resting position, all the ring elements involved can be inserted into the base element. Only the size of the base element and the size of the ring elements that can be inserted into it determine the installation space required below the cooktop in the resting position.

[0014] In the extended position, the intermediate elements and the extraction element form a tower-like extraction duct projecting from the surface of the cooktop, the height of which is adjustable depending on the number of intermediate elements extended from the cooktop plane. The invention is thus essentially based on the consideration that any number of intermediate elements can be provided, which have only a relatively low height. This achieves a high degree of flexibility in order to realize several different extraction heights.

[0015] Different suction heights can be adjusted using various designs. The intermediate elements and the suction element can be extended from the base element manually or with the assistance of a drive mechanism. Furthermore, a locking mechanism must be provided to hold the suction element at the height of the selected suction position.

[0016] A locking mechanism can be implemented in a simple way by dimensioning the diameter of the receiving area in the base element, the diameter of the intermediate elements and the suction element in such a way that a frictional effect can form between the ring surfaces of the ring elements in contact, whereby the intermediate elements in the extension position and the suction element in the extension position are automatically held at the height of the set extension position.

[0017] In a technically sophisticated design, an electrically controlled actuator or an electric drive motor can be provided as a drive device in order to extend the intermediate elements and the extraction element to the desired extraction level.

[0018] The extension of the intermediate elements and the extraction element from the base element can advantageously be initiated by a manual rotary motion. A mechanical drive device can be provided, which can be manually activated and which, for example, assisted by spring force, moves the extractor hood into the intended extension position.

[0019] An embodiment of the invention is shown schematically in the drawings and is described in more detail below. The drawings show the Fig. 1, Fig. 2 to Fig. 3. Using a simplified schematic diagram, a cooktop with the extractor hood designed according to the invention is shown in three different positions.

[0020] In this embodiment, the extractor hood 2 consists of the base element 21, which is fixed in the cooktop 1, a central intermediate element 22, and the extraction element 23, which forms the upper termination of the extractor hood 2. The surface of the cooktop 1 forms the cooking surface 11 on which the cooking utensils, such as a saucepan 4 and a frying pan 5, can be arranged.

[0021] The intermediate element 22 and the extraction element 23 are designed as concentrically arranged ring elements and are movably connected to each other. The extraction element 23 has a closed cover 24. The drawings show, as examples, a saucepan 4 and a frying pan 5 as cookware of different heights.

[0022] In the Fig. Figure 1 shows the extractor hood 2 in its inactive rest position. The intermediate element 22 and the extraction element 23 are located in the retracted position within the permanently installed base element 21. As can be seen from this illustration, the ring elements are essentially nested within each other, thus achieving the space-saving advantage of this design. Fig. 1 is clearly evident.

[0023] The Fig. Figure 2 shows the extractor hood 2 in an intermediate position in which the extraction element 23 has been moved out of the intermediate element 22 remaining in the base element 21, so that in this low extraction position, for example, roasting fumes rising from the frying pan 5 can be captured by the extraction flow generated by the switched-on fan of the extractor hood and can be directed away via the extraction element 23 and the extraction duct 3 below the hob.

[0024] In the Fig.Figure 3 shows the extractor fan 2 in its maximum extended position. In this embodiment, both the extraction element 23 and the intermediate element 22 are extended from the base element 21, so that in this position cooking fumes can also be extracted from taller cookware, such as the symbolically represented saucepan. The arrow shown in the schematic diagrams illustrates how, in the embodiment according to the invention, cooking and frying fumes can be extracted from different heights.

[0025] The drawings show the extractor hood with only one intermediate element 22 in purely exemplary form. However, it is of course possible to provide several intermediate elements 22 between the base element 21 and the extraction element 23, as required, in order to extract kitchen fumes from higher levels as well.

[0026] The upper extraction element 23 has at least one extraction opening 25. Preferably, the extraction element 23 comprises several extraction openings 25. The extraction openings 25 are preferably arranged such that they are directed from the central position of the extractor hood towards the adjacent cooking areas.

[0027] Various designs and drive solutions are available for extending and adjusting the extractor hood to different heights. This can be done manually or by a mechanically or electrically operated drive mechanism.

[0028] The slidingly connected intermediate elements 22 and the extraction element 23 of the extractor hood 2 can thus be moved out of the base element 21 by the user, either manually or with the assistance of an automated drive mechanism. Furthermore, a locking mechanism must be provided to hold the slidingly mounted ring elements at the height of the respective set extraction position.

[0029] A simple locking mechanism can be implemented by dimensioning the diameter of the receiving area in the base element 21, the diameter of the intermediate elements 22, and the suction element 23 such that friction can form between the ring surfaces of the contacting ring elements. This allows the ring elements to remain in the extended position without being able to slide back down due to gravity.

[0030] Depending on the required effort, an electrically controlled actuator or an electrically controlled drive motor can be used as the drive device to extend the intermediate elements and the extraction element to the desired extraction level.

[0031] The extension of the intermediate elements and the extraction element from the base element can advantageously be initiated via a manual rotary motion. For example, a mechanical drive device can be provided that can be manually activated and which, for instance, assisted by spring force, moves the extractor hood into the intended extension position. Reference symbol list: 1 hob 11 cooking zone levels 2 Extractor hood 21 Basic element 22 Intermediate element 23 Extraction element 24 coverage 25 Extraction opening 3 Extraction channel 4 saucepans 5 frying pans

Claims

Extraction device (2) for arrangement in a hob plane (11), which has an extraction duct movable vertically upwards from the hob plane (11) with at least one extraction opening (25) arranged therein for the purpose of extracting cooking fumes, and wherein the at least one extraction opening (25) of the extraction device (2) is movable into an extended position above the hob plane (11) and into an inactive rest position below the hob plane (11), characterized in that the extraction device (2) comprises a base element (21) fixed in the hob plane (11), one or more intermediate elements (22), and an extraction element (23), wherein the extraction element (23) closes off the extraction device (2) within or above the hob plane (11) and wherein the at least one extraction opening (25) is arranged on the lateral circumference of the extraction element (23).and that the intermediate elements (22) and the suction element (23) are designed as concentrically arranged ring elements and are movably connected to each other. Extraction device (2) according to claim 1, characterized in that the intermediate elements (22) and the extraction element (23) are designed and connected to each other in such a way that they are inserted into the stationary base element (21) in the rest position of the extraction device (2), and that the intermediate elements (22) and the extraction element (23) form a tower-shaped extraction shaft extending above the hob level (11) in the extended position, the height of which is adjustable depending on the number of intermediate elements (22) moved out of the stationary base element (21). Extraction device (2) according to claim 1 or 2, characterized in that the extraction element (23) has a closed cover (24) at its upper end, and / or that the at least one extraction opening (25) is provided in an upper section of the extraction element (23), and / or that the at least one extraction opening (25) is arranged in the outer surface of the extraction element (23), and / or that the extraction element (23) has several extraction openings (25) which are in particular directed towards the cooking zones of the hob plane (11). Extractor hood (2) according to at least one of the preceding claims, characterized in that the intermediate elements (22) which are slidably connected to each other and the extraction element (23) of the extractor hood (2) can be moved out of the base element (21) manually or with the aid of a drive mechanism and are held at the height of the respective set extraction position by means of a locking mechanism. Extraction device (2) according to at least one or more of the preceding claims, characterized in that the diameter of the receiving opening in the base element (21), the diameter of the intermediate elements (22) and the extraction element (23) is dimensioned such that a frictional effect is formed between the ring surfaces in contact, whereby the intermediate elements (22) and the extraction element (23) in the extension position are automatically held at the height of the set extension position. Extraction device (2) according to at least one of the preceding claims, characterized in that the removal of the intermediate elements (22) and the extraction element (23) from the base element (21) can be initiated by a rotary movement. Extractor hood (2) according to at least one of the preceding claims characterized in that a mechanical drive device is provided which can be activated manually and which moves the extractor hood (2) into the intended extension position by means of spring force. Extraction device (2) according to at least one of the preceding claims, characterized in that the intermediate elements (22) and the extraction element (23) can be moved from the surface of the cooktop (1) into an extraction position adapted to the height of the intended extraction plane via an electrically driven drive mechanism. Extractor hood device (2) according to claim 8, characterized in that an electrically controllable actuator or an electric drive motor is provided as the drive device. Hob (1) with a ventilation device (2) according to at least one of claims 1 to 9, wherein the base element (21) is connected to the hob (1).

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