CN116025938A

CN116025938A - Fume exhaust fan

Info

Publication number: CN116025938A
Application number: CN202211304739.2A
Authority: CN
Inventors: H·利克
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2021-10-25
Filing date: 2022-10-24
Publication date: 2023-04-28
Also published as: DE102021211970A1; EP4170244A1

Abstract

The present invention relates to a range hood, comprising: a range hood housing (7); a cover plate (3) which is pivotably mounted on the hood housing (7) and is used for covering a suction opening of the hood (10); and an actuating mechanism for moving the cover plate (3). The range hood (10) is characterized in that the cover plate (3) is fastened to the range hood housing (7) by means of a hinge (6), and that the actuating mechanism comprises at least one screw thread cable (2) which is engaged at the inner side of the cover plate (3) and which is connected to a drive unit (8) in the range hood housing (7).

Description

Fume exhaust fan

Technical Field

The invention relates to a range hood.

Background

In smoke hoods, it is known to cover the suction opening of the smoke hood with a cover plate, at least when the smoke hood is not in use. When the range hood is in operation or after this, the cover plate must then be moved away from the suction opening to such an extent that a suction of the fumes and smoke that occur on the hob mounted below the range hood can be ensured. It may furthermore be necessary for the cover plate to be moved in such a way that it is easily accessible for replacement of the underlying filter element. For this purpose, the cover plate can be pivoted, that is to say opened, for example.

Since the cover plate is partially made of a material having a large weight at the hood, a significant force is required to move the cover plate. In order to be able to apply such forces, the actuating units for moving the cover plate are therefore generally designed to be large and therefore require significant installation space. However, since the range hood is generally designed smaller, in particular because of the visual appearance, the installation space given in the range hood is small.

Disclosure of Invention

The object of the present invention is therefore to find a solution with which, on the one hand, a reliable movement of the cover plate of the range hood can be achieved and, on the other hand, the installation space required for this in the range hood is minimized.

According to the invention, this object is achieved by a range hood having the features of claim 1. Embodiments of the range hood are specified in the dependent claims.

The invention therefore relates to a range hood having: a smoke exhaust ventilator housing; a cover plate pivotally supported at the range hood housing for covering a suction opening of the range hood; and an actuating mechanism for moving the cover plate. The range hood is characterized in that the cover plate is fastened at the range hood housing by means of a hinge and the handling mechanism comprises at least one screw thread cable which is engaged at the inner side of the cover plate and which is connected to a drive unit in the range hood housing.

According to the invention, the range hood for a kitchen is referred to as a range hood, by means of which the range hood can suck in soot and fumes from a hob mounted below the range hood and, if necessary, from a working surface in the kitchen.

The range hood has a suction opening through which sucked air, in particular soot and fumes, can be sucked into the interior of the range hood. The suction inlet can be arranged in the underside of the range hood or in the front side of the range hood.

In addition, the range hood has a cover plate for covering a suction opening, which can also be referred to as a suction inlet. The cover plate covers the suction opening only temporarily. In particular, in a state of the range hood in which the range hood is not operated, the suction opening can be covered by the cover plate.

The suction opening is disposed in a range hood housing of the range hood. In particular, the part of the range hood in which the ventilation device is received is called the hood housing, through which air is sucked in. The hood housing typically has a box shape or channel shape. A filter element, also called a grease filter, can be arranged in the suction opening.

The cover plate is pivotally supported at the range hood housing according to the invention. The cover plate is therefore also referred to as a flap. In the closed, that is to say closed, state, the cover plate preferably covers the entire suction opening of the range hood and only releases the edge suction region. The sucked air is preferably guided, diverted and/or guided through the cover plate to the suction opening. In the open state of the cover plate, the path towards the grease filter in the suction opening is released.

The range hood further has an actuating mechanism for moving the cover plate. The actuating mechanism is preferably a motor-type mechanism.

The cover plate is fastened at the range hood shell through a hinge. The cover plate can be pivoted by the hinge. In order to influence the pivoting movement by the hinge, damping means can be applied in the hinge or separately.

According to the invention, the actuating mechanism comprises at least one pitch cable. The cable having a core and a helix surrounding the core is referred to as a pitch cable. The core is preferably composed of ropes, in particular strands. The spiral can consist of a wire, in particular a spring wire. The pitch cable is used to transform rotational motion into translational motion. The pitch cable can transmit tensile or compressive forces. According to one embodiment, the pitch cable has a tensile strength of at least 2,200N. The diameter of the core can for example lie between 2 mm and 8 mm. The diameter of the spiral material can be, for example, in the range of 1 mm to 2 mm and the spiral pitch in the range between 2 mm and 3 mm. Based on the structure of the pitch cable consisting of the core and the helix, the pitch cable is flexible (flexibel) and can also be referred to as a flexible rack.

The pitch cable is according to the invention joined at the inner side of the cover plate. The side facing the suction opening is called the inner side of the cover plate. The pitch cable can be fastened directly to the inner side of the cover plate or via an intermediate element, for example a part of a hinge, in particular a hinge strap. Furthermore, the pitch cable is connected according to the invention to a drive unit of the actuating mechanism, which drive unit is arranged in the hood housing. The drive unit is embodied in particular as a motor-type drive unit, which produces a rotary motion. The connection to the drive unit can be achieved, for example, by a pinion (Ritzel) which engages into the helix of the pitch cable.

By connecting the cover plate to the hood housing via a hinge and furthermore providing at least one screw thread cable, which is connected to the inner side of the cover plate and to the drive unit in the hood housing, a number of advantages can be achieved.

In particular, the cover plate can be pivoted in a simple manner in such a way that it optionally releases or closes the suction opening. Furthermore, the position requirement is reduced by using at least one pitch cable and a drive unit connected thereto. Furthermore, the cover plate can also be manufactured from heavy materials, such as, for example, glass, since the pitch cable can transmit large forces. In addition, the noise generation during pivoting of the cover plate can also be reduced by using a screw cable and a corresponding motor-type drive unit. Finally, the use of a screw thread cable allows a flexible arrangement of the drive unit in the range hood, since the screw thread cable can also reliably transmit forces in a curved shape.

According to one embodiment, the pitch cable is joined at the hinge at the cover plate. In particular, the pitch cable can be engaged at a tab or strap of the hinge, which tab or strap is fastened at the inner side of the cover plate. The advantage obtained thereby is that in the case of a transparent material of the cover plate, the pitch cable cannot be seen by the user. The arrangement of the pitch cable at the hinge is only possible because of the large forces that can be transmitted through the pitch cable. In the case of a transmission device which is capable of transmitting only small forces, it is necessary to engage the transmission device at a position of the cover plate spaced apart from the hinge in order to be able to take full advantage of the leverage. A further advantage of the arrangement of the pitch cable at the hinge is that the pitch cable comes into contact with the inflowing smoke only over a short length in the flipped-open state of the cover plate. Furthermore, by this arrangement the length of the screw thread cable which is arranged unsupported between the hood housing and the cover plate is also minimized and thereby prevented from breaking.

According to one embodiment, the cover plate is arranged at the front side of the range hood housing and the drive unit is arranged at the rear wall of the range hood housing.

Unless otherwise indicated, the directions above, below, front and rear are as described above with respect to the case of the range hood in the assembled state. The user facing side is referred to as the front side of the range hood and its components. Typically the front side faces away from the mounting wall to which the range hood is secured. The rear side of the range hood and in particular the rear side of the hood housing is usually fastened at the mounting wall.

In embodiments in which the cover plate is disposed at the front side of the hood housing, the suction inlet can alternatively be in vertical or be inclined forward relative to vertical. In the latter case, the range hood can also be referred to as a tilt chimney.

The drive unit is preferably arranged at the rear wall of the hood housing. The drive unit is arranged here in particular on the inside of the rear wall of the hood housing.

By arranging the drive unit at the rear side of the hood housing, the drive unit is arranged in a region of the hood housing outside the flow region in which air flows in the hood housing to the ventilation device arranged therein. Thus, the drive unit is protected. However, the connection to the cover plate can also be ensured in this arrangement of the drive unit by a screw thread cable, since this screw thread cable can be bent according to the geometry of the hood housing and nevertheless can exert a force directed forward or backward on the cover plate and can then be opened or closed.

According to one embodiment, the drive unit arranged at the rear wall of the hood housing is arranged offset with respect to the middle of the hood housing. This arrangement of the drive unit has the advantage that the ventilation device, which is usually arranged centrally in the range hood housing, can furthermore be arranged centrally, and nevertheless the depth of the range hood housing does not have to be increased for the arrangement of the drive unit. In this embodiment, the drive unit is preferably arranged offset laterally with respect to the ventilation device. Such an arrangement is also possible with two pitch cables, since the distance between the drive unit and the cover plate, which has to be covered by the pitch cable, does not affect the forces that can be transmitted through the pitch cable.

According to one embodiment, at least one pitch cable is at least partially received in the guide tube. The longitudinal rigidity of the pitch cable can thereby be supported and, if necessary, the pitch cable can be held in a curved shape. However, the at least one guide tube is preferably designed only so long that it does not protrude beyond the suction opening of the hood housing, i.e. is preferably located in the hood housing.

According to a preferred embodiment, the actuating mechanism comprises at least two screw threads, which are connected to a common drive unit. Preferably the steering mechanism comprises exactly two pitch cables. In such an embodiment, each of the pitch cables can be joined to the cover plate at or adjacent to a lateral edge of the cover plate. By symmetrically engaging the pitch cable at the cover plate, warping of the cover plate can be prevented at the time of the pivotal movement. The connection of the pitch cable to the common drive unit ensures a uniform pivoting out of the cover plate on both sides.

According to one embodiment, a carrier structure is provided at the range hood housing, by means of which at least the drive unit is carried. This ensures precise positioning of the drive unit relative to the cover plate and one or more pitch cables arranged between them.

According to one embodiment, the carrier structure supports at least a portion of at least one pitch cable. The support can be directly or indirectly realized. In particular, the pitch cable can be guided directly on the carrier structure. Alternatively, the guide tube in which the pitch cable is guided can be held on a carrier structure.

According to one embodiment, a clamping protection is arranged between the cover plate and the pitch cable. Thereby, gripping of the user's finger or object can be prevented. The clamping protection can be achieved by a spring or other elastic element.

The cover plate of the range hood can consist of glass, stainless steel, aluminum or plastic, for example. The advantages of the invention can be particularly exploited for each of these materials. For example, by using a screw thread cable, reliable opening and closing of the upper cover plate can be ensured even in the case of heavy materials, i.e. glass. The fastening of the hinge or the pitch cable is simplified in relation to other materials.

Drawings

The invention is explained next with reference again to the drawings. Wherein:

fig. 1 shows a schematic perspective top view looking at the rear side of an embodiment of a range hood according to the invention;

fig. 2 shows a schematic side view of the range hood according to fig. 1 with the cover plate in the closed state;

fig. 3 shows a schematic side view of the range hood according to fig. 1 with the cover plate in the open state; and is also provided with

Fig. 4 shows a perspective bottom view of the range hood from the front in the state according to fig. 3.

Like elements are denoted by like reference numerals in the figures and are described only once if necessary.

Detailed Description

Fig. 1 shows a schematic perspective top view of a rear side of an embodiment of a range hood 10 according to the invention. In the embodiment shown, the range hood 10 consists of a hood housing 7 and a cover plate 3, which is also referred to as a flap. In the embodiment shown, the suction opening covered by the cover plate 3 is located at the front side of the hood housing 7 and is inclined forward from the vertical. The cover plate 3 is fastened to the hood housing 7 by means of a hinge 6. In the embodiment shown, the hinge 6 is fastened at the upper edge of the hood housing 7 and in particular at the upper edge of the suction opening. A ventilation device 5 is arranged in the interior of the hood housing 7, through which air is sucked into the interior of the hood housing 7 via the suction opening.

In addition, an actuating mechanism is provided in the range hood 10, which actuating mechanism comprises a drive unit 8 and two screw cables 2 in fig. 1. The pitch cables 2 are received in guide tubes 1 which are each bent into an L-shape. The drive unit 8 is arranged at the inner side of the rear wall of the hood housing 7. For this purpose, a carrier structure 9 is provided at the inner side of the rear wall of the hood housing 7, on which the drive unit 8 is placed. The carrier structure 9 extends along a horizontal line within the interior of the rear wall of the hood housing 7. Two pitch cables 2 extend between the carrier structure 9 and the cover plate 3. Each of the pitch cables 2 extends along a horizontal line. The front end of the pitch cable 2 is fastened at the cover plate 3. In the rear region of the pitch cables 2, these are connected to a drive unit 8. In particular, for example, a pinion (not shown) of the drive unit 8 can engage with a spiral (not shown) of the pitch cable 2 in order to move the pitch cable.

The pitch cable 2 is held in a guide tube 1 which is placed on a carrier structure 9 along the rear wall of the range hood housing 7. The guide tube 1 is bent forward from the rear wall of the hood housing 7 and extends as far as the front side of the hood housing 7, that is to say as far as the suction opening.

In the embodiment shown, a clamping protection element 4 is arranged between the cover plate 3 and the pitch cable 2 at the front end of the pitch cable 2.

Fig. 2 shows the range hood 10 according to fig. 1 in a side view in the closed state of the cover plate 3. In this state, the pitch cable 2 protrudes slightly beyond the front side of the range hood housing 7. In this embodiment, the cover plate 3 therefore does not rest against the suction opening, but is at a small distance from the suction opening. Fig. 3 shows the range hood 10 according to fig. 1 in the state in which the cover 3 is opened. In this state it can be seen that the cover plate 3 has been pressed forward by the pitch cable 2.

Fig. 4 shows the range hood 10 in the state of fig. 3 in a perspective view from the front. The filter elements which may be arranged in the suction opening of the hood housing 7 are not shown in fig. 4. Fig. 4 thus provides an observation into the interior of the hood housing 7 and onto the ventilation device 5 received in the hood housing 7. In this view, it can be seen that the screw thread cable 2 protrudes beyond the suction opening, in particular the front side of the hood housing 7, and protrudes forward beyond the guide tube 1 in the folded-out state of the cover plate 3. Furthermore, from this view it can be seen that the front end of the pitch cable 2 is fastened at the hinge 6. In particular, the front end of the pitch cable 2 is fastened at the inner side of the hinge strap 60 of the hinge 6, which in turn is fastened at the inner side of the cover plate 3.

The structure of the range hood 10 and the functional mode of one embodiment of the operating mechanism composed of the drive unit 8 and the pitch cable 2 can be explained as follows.

The drive unit 8 can be fastened to a separate carrier structure 9, which can also be referred to as a carrier member, or at other members of the hood housing 7. The motor-driven drive unit 8, which can be fastened to the carrier element 9, has a guide tube 1, which can be adapted geometrically to the insertion position, in which guide tube a thread pitch cable 2 is guided, which converts a rotational movement into a translational movement. The cover 3 (flap) is connected in one embodiment to a hinge 6, which itself is connected to the hood housing 7 and to the pitch cable 2. The pitch cable 2 can be fastened at the hinge 6, for example by means of the clamping protection element 4 or without clamping protection, or separately on the cover plate 3 (flap). The cover plate 3 is pivoted by means of the hinge 6 by operating the drive unit 8. A damping system (not shown) can be integrated or fastened in the hinge 6 or at the hinge 6.

The present invention has a number of advantages.

On the one hand, the cover plate or flap covers the suction opening in the closed state and releases the suction opening when the cover plate or flap is opened. The actuating mechanism of the range hood is a space-saving mechanism which can be integrated in a simple manner into the hood housing of the range hood. Furthermore, the design of the cover plate is flexible. On the one hand, larger-sized cover plates can be used, and on the other hand, the material of the cover plates can be freely selected and is, for example, glass, aluminum, stainless steel or plastic. In addition, the motor-driven drive by means of a pitch cable is generally quieter than the known screw drives or the like, so that noise generation can be reduced when the flap is actuated. In addition, the design of the range hood with a small gap can be realized. Finally, the clamping protection for fingers and objects can be integrated in the handling mechanism.

List of reference numerals:

1. guide tube

2. Pitch cable

3. Valve

4. Clip protection

5. Ventilation device

6. Hinge

60. Hinge belt

7. Smoke exhaust ventilator shell

8. Driving unit

9. Carrier structure

10. A smoke exhaust ventilator.

Claims

1. A range hood, comprising:

a range hood housing (7);

a cover plate (3) pivotally mounted on the range hood housing (7) for covering a suction opening of the range hood (10); and

an actuating mechanism for moving the cover plate (3),

it is characterized in that the method comprises the steps of,

the cover plate (3) is fastened at the range hood housing (7) by means of a hinge (6), and the actuating mechanism comprises at least one screw thread cable (2) which is engaged at the inner side of the cover plate (3) and is connected to a drive unit (8) in the range hood housing (7).

2. Range hood according to claim 1, wherein the pitch cable (2) is joined at the hinge (6) at the cover plate (3).

3. A range hood according to any one of claims 1 or 2, wherein the cover plate (3) is arranged at a front side of the range hood housing (7) and the drive unit (8) is arranged at a rear wall of the range hood housing (7).

4. A range hood according to claim 3, wherein the drive unit (8) is arranged offset at the rear wall with respect to the middle of the range hood housing (7).

5. Range hood according to any of claims 1 to 4, wherein the at least one pitch cable (2) is at least partially received in the guide tube (1).

6. Range hood according to any of claims 1 to 5, wherein the handling mechanism comprises at least two pitch cables (2) connected with a common drive unit (8).

7. Range hood according to any of claims 1 to 6, wherein a carrier structure (9) is provided at the range hood housing (7), by means of which at least the drive unit (8) is carried.

8. Range hood according to claim 7, wherein the carrier structure (9) supports at least a portion of the at least one pitch cable (2).

9. Range hood according to any of claims 1 to 8, wherein a clamping protection (4) is arranged between the cover plate (3) and the pitch cable (2).

10. Range hood according to any of claims 1 to 9, wherein the cover plate (3) consists of glass, aluminium or plastic.