WO2012130439A2

WO2012130439A2 - Extractor hood with extraction handle

Info

Publication number: WO2012130439A2
Application number: PCT/EP2012/001352
Authority: WO
Inventors: Udo Berling
Original assignee: Berling Gmbh
Priority date: 2011-03-28
Filing date: 2012-03-28
Publication date: 2012-10-04
Also published as: WO2012130439A3; DE102011015359A1; DE102011015359B4

Abstract

The invention relates to an extractor hood (2) comprising a housing which is composed of removable components. In order to be able to easily clean accumulated oils and fats from said extractor hood, a radial fan (6) and/or a collector (22) can be extracted from said extractor hood (2) by means of an extraction handle (34).

Description

Extractor hood with pull-off handle

The present invention relates to an extractor hood with a housing, of which components are designed to be removable.

A generic extractor hood is disclosed in the document PCT / EP 2008/008401. The air stream flowing through this extractor hood is initially sucked in by the radial fan in the middle in the axial direction, deflected by the fan fins, accelerated and blown out in the radial direction and then redirected back to a substantially axial direction. The hood of this type is able to separate from a sucked cooking fume or other polluted air, such as occurs in industrial plants, increased amounts of fats and oils in the air, which are accumulated in the hood.

In order to easily clean the hood of the accumulated oils and fats, it is proposed to design the radial fan and a collecting device removable. However, it does not specify how this should be done.

Accordingly, it is the object of the present invention to provide a solution as the polluted components can be removed as user friendly as possible from the hood. Since the extractor hoods are normally installed at an overhead height, the degradation is additionally exhausting and unpleasant.

The object is achieved for a generic fume hood by the extractor hood a radial fan and / or a tub with a pull-off handle can be removed.

The pull-off handle allows the radial fan and / or the pan to be removed from the hood with increased force. In particular, if the peel-off handle is designed so that it can be enclosed with the whole hand, large peel-off forces can be introduced into the peel-off handle. As the radial fan and the tub

CONFIRMATION COPY As well as any additional trim parts can weigh a lot, a safe removal and seizing of these components is an important prerequisite for the use, handling and acceptance of removable designed components. The easier the components contaminated with fats and oils are to be removed from the extractor hood, the better an operator will clean the components. With the pull-off handle can be worked well and safely over the head of an operator, and the components to be removed can also be kept well with the Abziehgriff after the components have detached from the hood. In particular, the pull-off handle makes it possible to keep the components straight after releasing them from the extractor hood. This is important when liquid oil and grease have accumulated in the tub, which can flow out when the components are inclined and pollute the environment and require additional cleaning work.

If only a single pull-off handle for removing both components can be used, only a single part must be kept ready. With limited storage space in an average kitchen this is an important aspect. In addition, the operation is simplified if it is not necessary to distinguish between several parts in a mining operation.

A separately stored pull-off handle is also advantageous because it does not pollute by rising cooking fumes. In particular, if the radial fan and / or the tub to be removed because of contamination by oils and fats, even a stationary on the hood extractor handle by fats and oils would be greasy and slippery. Due to the separate storage, the contamination of the peel-off handle is avoided. With the pull-off handle, the component or components can be removed from the hood and set directly into the dishwasher without further ado.

Since a separate extractor handle eliminates other manually operated locking elements, the design of the hood purist can be designed with smooth, easy to care for surfaces. According to one embodiment of the invention, the pull-off handle can be fastened in a receptacle in the radial fan and / or the tub, in which the pull-off handle can be loaded to train. A receptacle in the component to be subtracted can be arranged hidden, so that it is not visible from the outside. The recording serves the purpose of securely connecting the peel handle with the component to be peeled off. The receptacle may be provided with a suitable connection technique, for example a latching, clamping, locking, bayonet or other suitable locking. The locking and unlocking can also be done electrically or electronically, for example, by appropriate contacts or other sensors.

According to one embodiment of the invention, the peel-off handle can be screwed into the radial fan in a screw thread as a receptacle. A screw thread is easy to understand, maintenance-free, insensitive to possible contamination and sufficiently reliable.

According to one embodiment of the invention, the thread in the radial fan on a screwing, which is in the same direction to the direction of rotation of the radial fan. By the same sense of rotation of the thread and the radial fan a possible risk of accidents is avoided when a person tries to screw the peel handle, when at the same time rotates the radial fan driven. With a driven in the same direction rotation of the radial fan, it does not matter if it is rotated slower, faster or faster than the Abziehgriff. As with every faster rotary motion of the radial fan, the pull-out handle unscrews from the screw thread when firmly held by an operator, the pull-off handle can not transmit forces that could injure a person.

According to one embodiment of the invention, the peel-off handle can only be fastened in the receptacle when the radial fan is stationary. This can be ensured by the above-described screw solution, but there are also other solutions available, such as a freewheel in the fan drive, through which the fan is powerless in one touch, a controlled via speed sensors electronic rule or mechanical locking and / or unlocking of the recording, a locking of the drive motor and / or the radial fan at a standstill or the like. has only the radial fan on a recording and with the inserted into the recording peel handle the radial fan and the tray of the hood are removable. This combination ensures that the radial fan and the pan can only be removed together. If the tub could be removed independently of the radial fan, the radial fan with its air blades could be exposed. If the cooker hood were then turned on, people could injure themselves on the freely rotating air blades.

According to one embodiment of the invention, an engagement protection is connected to the trough, which has a recess through which the peel-off handle can be inserted into the receptacle on the radial fan. The protection against interference prevents a person from reaching into the intake area of the radial fan and from injuring themselves at the rotating air blades. In the intervention protection is only such a small recess that thereby the peel-off handle can be inserted into the receptacle. Such a small opening is safety-critical. Due to the protection against engagement with recess, the operational safety of the extractor hood is maintained.

According to one embodiment of the invention, the receptacle is preceded by a centering aid. By the recording upstream centering the insertion of Abziehgriffes is facilitated in the recording, which is a great help especially overhead work and poorly visible recording. The pull-off handle slides through the centering without accurate aiming into the recording.

According to one embodiment of the invention, the radial fan and / or the tub are secured in their position of use by a lock. The lock ensures that the components can not unintentionally come loose from their position of use. The lock is designed advantageously detachable, so that the components can be removed from the cooker hood on request. The locking can be achieved in particular by mechanical, electrical, magnetic, electronic, Hydraulic and / or other means done. However, the lock should be canceled only when the radial fan and not accidentally.

According to one embodiment of the invention are used as locking ball catch. Ball catches are locking elements in which a locking ball is held by the force of a spring as a force storage in a mechanical locking position. The holding force of Kugelschnäppers is adjustable by selecting a spring with a suitable spring characteristic. Ball catches are maintenance-free, almost unlimited shelf life, reliable and cost-effective. The distribution of several ball catches around the circumference of the receptacles for the radial fan and / or the tub around a secure hold of the components in their position of use results. If the components are to be separated from the hood, a peel force must be applied by which the locking balls are pressed against the force of the springs in their recording until they can no longer exercise blocking function. Then the previously secured by the Kugelschnäppern components can slide out of their position of use. To insert the components in the position of use applies accordingly. The force required to overcome the spring forces of the ball catch can be easily introduced via the Abziehgriff in the corresponding component. The ball catch also give a good feedback, whether the corresponding component again exactly in his

Use position has been used. An insufficient seat, for example, is easily verifiable by a visual inspection. With a good installation overcoming the spring forces is clearly noticeable.

According to one embodiment of the invention, the radial fan on abutting surfaces, with which the radial fan is seated on a seating on the pan during a peeling operation. Since the centrifugal fan is a rotating component and the tank is a stationary component, the two components must not touch each other in their position of use. However, if both components are to be drawn off by a peel-off handle connected to the radial fan, the pull-off forces acting on the radial fan must be transferred to the trough, so that these too can be pulled out of their position of use. This can be done by the mutually corresponding shock and seating surfaces that are designed sufficiently powerful. According to one embodiment of the invention, a labyrinth seal and / or in the abutting region of the trough to the support bell an elastic seal is present in the proximity region between the radial fan and the tub. Since the radial fan builds up an air pressure on its pressure side, but this air pressure is not too easily lost through open joints again, the pressure loss can be limited by tightly dimensioned labyrinth seals and / or an elastic seal. The labyrinth seal is particularly suitable for transition from a stationary to a rotating part, while the elastic seal is used in an abutment area from one stationary to another stationary part.

According to one embodiment of the invention, the radial fan is positively connected to the engine output. It is important to make the transmission of the driving force from the drive motor to the radial fan so that despite the separation of the centrifugal fan of the hood and the subsequent replacement by technical laymen again and again sets a reliable functioning drive. This is possible by the positive connection of the radial fan with the engine output. In addition, imbalances can be avoided. It is also possible to integrate the coupling parts in otherwise existing components such as the radial fan or the motor housing, so that the number of components used is kept low. A matching relative position of the positive-locking elements of the radial fan and the engine output automatically adjusts itself to a sliding movement of the radial fan on the engine output when the engine output and / or the radial fan in the region of the positive connection elements have tapered sliding surfaces through which the components inevitably at a Turn insertion movement into a suitable relative position to each other.

It is expressly understood that the above-described embodiments of the inventions can be combined individually with the subject matter of the main claim and other embodiments, as far as this description and the claims is not otherwise. This also applies to individual features that are named for the individual configurations. Further modifications and details can be taken from the following description and the accompanying drawings.

The invention will now be described with reference to an embodiment in the accompanying drawings. Show it:

1 is a cross-sectional view of an extractor hood,

Fig. 2: a view obliquely from below on a hood with dismantled tub and dismantled radial fan, and

Fig. 3: an individual representation of the removable components.

FIG. 1 shows an extractor hood 2 in which a drive motor 4 rotatably drives a radial fan 6. The drive motor 4 is arranged in an installation space 8.

The radial fan 6 is arranged coaxially to the output shaft of the drive motor 4 and has a side wall 10 facing the drive motor 4 and a number of air blades 12. In a rapid rotating movement of the radial fan 6, the air blades 12 generate an air flow in the axial direction of the radial fan 6 centrally sucked, then transported into the spaces between the air blades 12, accelerated there and is deflected in a substantially radial direction. Then, the air flow exits the outlet openings between the air blades 12 from the radial fan 6 and in the air duct 16, which surrounds the radial fan 6 and the installation space 8 annular, a. In order to avoid an intervention of persons in the current radial fan 6, an engagement protection 14 is arranged in the region of the suction opening of the extractor hood 2, which can be configured like a lattice. The engagement protector 14 has in the embodiment shown a recess in which in Fig. 1, the mounting pin of a lid is inserted. In the air duct 16, the air flow is deflected again in a substantially axial direction to the central axis of the hood 2. The air duct 16 is bounded laterally by an outer wall 18 and an inner wall 20. A portion of the outer wall 18 is formed by a trough 22, the radial fan 6 at a distance substantially laterally, but also at least partially downwards embraces. Below the radial fan 6, the trough 22 forms a collecting trough, in which on the outer wall 18 from the air stream deposited oils and fats can accumulate. The upper part of the outer wall 18 is formed by a wall which is part of an upper support bell.

The two parts of the outer wall 18 are connected in the embodiment by a circumferential seal 24. The air duct 16 toward the seal 24 forms a projection 26 which protrudes in proportion to the surface of the adjacent upstream wall of the trough 22 by a dimension. The projection 26 has on its upstream side a rounded cross-sectional contour, whereby the flow of air through the projection 26 is facilitated without unnecessary turbulence. Notwithstanding the embodiment, the projection 26 may also be formed on the walls of the trough 22 or the support bell.

The air flow enters the air duct 16 upstream and below the protrusion 26 from the outflow openings of the radial fan 6 and is deflected upward by the outer wall 18 in the region of the tub 22. In this case, the air flow must flow around the outer edge of the side wall 10 around. Diagonally opposite to the outer edge of the side wall 10 is the projection 26, which together with the collar 28 located on the opposite side forms a constriction in the air duct. The collar 28 is attached circumferentially on the outer edge of the side wall 10 on its outer circumference and extends in the flow direction of the air flow, it is thus turned over to the plane of the rotationally driven side wall 10. At the end of the collar 28 joins on the inside of the air duct 16, the parting line 30 at. The parting line 30 separates the rotationally drivable side wall 10 and thus the collar 28th on the inner wall 20, which is a part of the support bell. The parting line 30 runs around the circumference of the collar 28.

The upper edge of the collar 28 and the seal 24 are arranged on one level. This results in a reduction of the radial fan 6 and the trough 22 of the hood 2, the possibility that the radial fan 6, including the collar 28 may be set in the tub 22, for example in a dishwasher for cleaning purposes, without one of the two components opposite protruding from the other component.

In the air duct 16 close to the parting line 30 rectifier flow surfaces 32, through which the flowing through the air duct 16 air rollers are made uniform. By equalizing the air flow in a stream with the same laminar flow, the recording and line capacity of the adjoining the extractor hood exhaust pipes can be fully utilized.

In Fig. 2 is a view obliquely from below on a hood with disassembled trough and dismantled radial fan is shown. A pull-off handle 34 is screwed into the screw thread 36 shown in the radial fan 34 and in FIG. 1. In the screwed-in position shown in Fig. 2 can be held together with the trough 22 with the peel-off handle 34 of the radial fan 6.

In addition, in the cross-sectional view in FIG. 1, the abutment surfaces 38 on the radial fan 6 and the seat surfaces 40 on the trough 22 can be seen. When the radial fan is pulled down with the pull-off handle 34, the abutment surfaces 38 abut the seat surfaces 40 and thus transmit the applied tensile forces to the trough 22. In addition, the centering aid 42 is clearly visible in FIG. In the exemplary embodiment, the centering aid 42 consists of a channel which is widened in the lead-in area and tapering in its course, which tapers to the dimensions of the screw thread 36. In Fig. 2, the engine output 44 is seen from the bottom obliquely. In the exemplary embodiment, the engine output 44 is configured as a pot-shaped part which has a number of drivers 48 distributed over its outer circumference. The drivers have at their front ends on sliding surfaces 46 which are rounded and bevelled and which provide for a Aufschiebebewegung the radial fan 6 for a relative rotation of the two components to each other, so that after pushing a positive connection between the engine output 44 and the corresponding shaped receptacles for the driver 48 in the radial fan 6 results.

In Fig. 2 also some of the support bell and the motor driven ball catch 50 can be seen. At the radial fan 6 and the trough 22 corresponding protrusions or ledges are formed in the corresponding to the ball catches 50 component areas, which engage behind the balls of the ball catch 50 in the position of use of the components.

In Fig. 3 is a single representation of the removable components is shown. In this view, the pull-off handle 34 is seen in a unscrewed position. In addition, the tub 22 and the radial fan 6 are shown as separate components.

The invention is not limited to the present subject description based on an embodiment. It is not difficult for the person skilled in the art, while maintaining the teaching according to the invention, to modify components or to replace them with alternatives having the same effect if this makes sense on the basis of concrete installation conditions.

Claims

claims

1. Extractor hood (2) with a housing, of which components are designed to be detachable, characterized in that from the extractor hood (2) a radial fan (6) and / or a trough (22) with a peel-off handle (34) are removable.

2. extractor hood (2) according to claim 1, characterized in that the Abziehgriff (34) in a receptacle in the radial fan (6) and / or the trough (22) can be fastened, in which the peel-off handle (34) is resilient to train.

3. extractor hood (2) according to claim 2, characterized in that the Abziehgriff (34) in the radial fan (6) in a screw thread (36) is screwed as a receptacle.

4. extractor hood (2) according to claim 3, characterized in that the screw thread (36) in the radial fan (6) has a screwing, which is in the same direction to the direction of rotation of the radial fan (6).

5. Extractor hood (2) according to one of the preceding claims 2 to 4, characterized in that the peel-off handle (34) can be fastened in the receptacle only when the radial fan (6) is stationary.

6. extractor hood (2) according to one of the preceding claims 2 to 5, characterized in that only the radial fan (6) has a receptacle and with the Abziehgriff used in the recording (34) of the radial fan (6) and the trough (22) from the hood (2) are removable.

7. Extractor hood (2) according to claim 5, with the trough (22) an engagement protection (14) is connected, which has a recess through which the Abziehgriff (34) in the receptacle on the radial fan (6) can be inserted.

8. Extractor hood (2) according to one of the preceding claims, characterized in that the receptacle is arranged a centering aid (42).

9. Extractor hood (2) according to one of the preceding claims, characterized in that the radial fan (6) and / or the trough (22) in their

Use position are secured by a lock.

10. extractor hood (2) according to claim 9, characterized in that are used as locking ball catch.

11. Extractor hood (2) according to one of the preceding claims, characterized in that the radial fan (6) has an abutment surface (38) with which the radial fan (6) in a removal operation on a seat surface (40) on the trough (22) seated.

12. Extractor hood (2) according to one of the preceding claims, characterized in that in the proximity region between the radial fan (6) and the trough (22) a labyrinth seal and / or in the abutting region of the trough (22) for supporting bell an elastic seal (24). is available.

13. Extractor hood (2) according to one of the preceding claims, characterized in that the radial fan (6) is positively connected to the engine output.

14. extractor hood (2) according to claim 13, characterized in that the radial fan (6) and / or the motor output (44) sliding surfaces (46), through which the components move in a Aufschiebebewegung in a form-fitting mating relative position.