EP1517094A1

EP1517094A1 - A stove hood

Info

Publication number: EP1517094A1
Application number: EP04022027A
Authority: EP
Inventors: Tonny Aström
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-19
Filing date: 2004-09-16
Publication date: 2005-03-23
Also published as: SE0302494L; SE525781C2; SE0302494D0

Abstract

A stove hood has a lower hood opening (2) and an outlet (17) arranged on the top for connection to a ventilation duct for suction of air from the room in which the stove hood is intended to be located. A fan (10) is arranged inside the stove hood between the hood opening and the outlet for generating said suction. A filter (19) for grease and the like is arranged in the stove hood upstream the fan. The fan is a radial fan designed to suck air axially only from a first side, and it is arranged with its side opposite to said first side with respect to the axial direction at a substantially vertical delimiting wall (14) of the stove hood.

Description

FIELD OF THE INVENTION AND PRIOR ART

The present invention relates to a stove hood according to the preamble of the appended claim 1.
A stove hood of this type may be connected to a ventilation duct in a building of an arbitrary type for suction of air from the space over a stove. The ventilation duct may for example be a part of a ventilation system in a building with several flats or in a one family house.
Stove hoods of this type are already known, in which a so called double radial fan, i.e. a radial fan having an inlet on both axial sides of an impeller, is arranged close to the hood opening. The fan is then normally arranged in a hood part diverging downwardly towards the hood opening and is through the outlet thereof tightly connected to a duct part connecting to the hood part. The reason for this is that such a fan requires a stove hood having a comparatively large cross-section where the fan is arranged, and that for that reason an arrangement of the fan in a duct part usually extending upwards along a wall of the room in question has at least mostly been avoided, since in such a case this duct tends to get a clumsy unpleasant appearance.
Stove hoods are also known, in which a radial fan having only one axial suction side is arranged with the axis directed substantially vertically. Such a fan is shown for example in SE-patent 500 073. Such a fan in such a device also requires a comparatively large horizontal cross-section of the stove hood where it is located.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a stove hood of the type defined in the introduction, which has properties improved in at least some respect with respect to already known such stove hoods.
This object is according to the invention obtained by providing a stove hood according to the appended claim 1.
By a totally new approach within this field to arrange a radial fan designed to suck air axially only from a first side and having a side opposite to said first side as seen in the axial direction at a substantially vertical delimiting wall of the stove hood, the stove hood may have a cross-section being reduced with respect to stove hoods already known at the location for the arrangement of the fan. As an alternative, it is possible to have the same cross-section as a stove hood already known at the location of the fan and instead utilize the smaller cross-section required by the fan itself to create a volume part in the stove hood on a level with the fan, of which volume part a part may be utilized as fumes trapping volume part by placing the filter inside thereof if desired. It is through the invention possible to arrange the fan in a duct part mentioned above if desired and at the same time give this duct part dimensions resulting in an attractive appearance.
A preferred embodiment of the invention also relates exactly to the arrangement of a first volume part inside the stove hood in the direction of the air flow therethrough upstream the fan in the horizontal direction between the fan and a substantially vertical second delimiting wall of the stove hood opposite to a vertical delimiting wall of the stove hood at which the fan is arranged.
According to another preferred embodiment of the invention the first volume part is restricted with respect to the downstream side of the fan through a substantially vertical partition wall inside the stove hood having a substantially horizontally directed opening directly in front of the fan, which is arranged in a second volume part in the stove hood formed by the partition wall, in which this second volume part, except to the first volume part, is only open to the outlet. The stove hood according to the invention with an additional first volume part may in this way be realized in a simple and thereby favourable way with respect to cost.
According to another preferred embodiment of the invention the fan is of the type designed to generate an overpressure in said second volume part for forcing air out through the outlet, and the fan is then preferably of the type that is surroundingly open in the radial direction out from the impeller for freely forcing out air moved by the blades of the impeller. By utilizing a radial fan of this type, i.e. of the type creating a pressure chamber in the second volume part at the exhausting side of the fan, the stove hood may be made extremely compact in the region of the location of the fan. Such a fan has no type of shell for guiding the air sucked into the fan, but it requires only that there is any type of walls enclosing a volume in which the impeller is arranged and which is only open towards said outlet, so that an overpressure is created inside this volume part. This means that the impeller may be arranged in a space being radially in the horizontal direction restricted by walls of the stove hood and no additional shell or other guide member is required, so that the cross-section of the stove hood may be utilized to a maximum.
According to another preferred embodiment of the invention the stove hood comprises a duct part having a substantially rectangular cross-section adapted to be arranged substantially vertically and inside which the fan is arranged. It is pointed out that "rectangular" also comprises "square". By arranging a fan of the type mentioned above according to the invention in the stove hood it will be possible to arrange this in said duct part.. This means that possibilities are provided for arranging a fumes trapping volume part inside the duct part as well as in a hood part tapering upwards and applicable under this duct part, said hood part defining the hood opening at the bottom thereof. The entire hood part may then if desired in the last mentioned case be used as volume part trapping fumes in the case that the filter is also arranged in the duct part.
According to a very preferred embodiment of the invention a vertical delimiting wall of the duct part has an opening covered by a removable plate and adapted to enable lifting of the fan out of the duct part in a substantially horizontal direction for maintenance and/or replacement. By the arrangement of the fan according to the invention this possibility is offered to arrange the fan removable from the stove hood in this way by a few simple manipulations. It is then advantageous to arrange the fan secured to said plate with the impeller rotatable for removal together therewith, which facilitates taking out the fan from the duct part, since this only has to be secured to the plate.
It is advantageous that said opening for lifting the fan out is arranged in a wall of the duct part adapted to form a front wall with respect to the arrangement of the stove hood in a said room. The lifting out of the fan hereby gets easy, especially when this is secured to said plate.
According to another preferred embodiment of the invention the stove hood comprises a throttle member controllable between an open position for suction of air from the room in which the stove hood is intended to be located, through the hood opening and out through the outlet and a closed position. It is then advantageous if the throttle member has a motor member integrated therein and adapted to bring the throttle member between said two positions as well as a control arrangement adapted to regulate the throttle member by sending control signals to the motor member. It is also advantageous that the stove hood comprises means for illuminating a space in the room under the stove hood and that then the illumination means are arranged inside the duct part at the lower side thereof. If at the same time a control panel for controlling the function of components included in the stove hood is arranged on the font wall of the duct part, the duct part may accommodate all functions necessary for the operation of the stove hood and together with the content thereof form the entire stove hood, so that this may be provided as a very compact unit requiring little space.
Further advantages as well as advantageous features of the invention appear from the following description and the other dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

With reference to the appended drawings, below follows a description of preferred embodiments of the invention cited as examples.
In the drawings:

Fig 1: is a sectioned side elevation of a stove hood according to a first preferred embodiment of the invention,
Fig 2: is an exploded perspective view of the stove hood according to Fig 1,
Fig 3: is a view corresponding to Fig 1 of a stove hood according to a second preferred embodiment of the invention,
Fig 4: is an exploded perspective view of the stove hood according to Fig 3,
Fig 5: is view corresponding to Fig 1 of a stove hood according to a third preferred embodiment of the invention, and
Fig 6: is an exploded perspective view of the stove hood according to Fig 5.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION

A stove hood according to a first preferred embodiment of the invention will now be described with reference to Figs 1 and 2. The stove hood has a duct part 1 with a substantially rectangular cross section, which comprises four vertical delimiting walls. The duct part has at the bottom a hood opening 2, which connects the room under the stove hood to a first volume part 3 of the duct part, which is restricted by the two vertical lateral walls 4, 5 of the duct part, the rear delimiting wall 6 of the duct part, and an upper substantially horizontal ceiling or cap portion 7 and a substantially vertical partition wall 8 having an opening 9 directed substantially horizontally, to which the inlet side of a radial fan 10 connects through an inlet cone 11.
The radial fan 10 is adapted to suck air axially only from a first side 12 and is arranged with a side 13 opposite to the first side with respect to the axial direction at a substantially vertical front delimiting wall 14 of the stove hood, here by being secured to this wall through a plate described further below.
The fan is of the type that does not have any guide means on the exhausting side thereof for guiding the air, but this is through moving of air inside the second volume part 15, in which it is located, through an impeller having large blades 16, each of which extends transversely to the impeller axis over a distance being in the same order of magnitude as the radius of the impeller, adapted to generate an overpressure in the second volume part for forcing air out through an outlet 17 of the stove hood. Thus, the second volume part 15 in which the fan 10 is located is restricted by the partition wall 8, a bottom wall 18 and delimiting walls 4, 5, 14 of the duct part. Thanks to the arrangement of the fan according to the invention a fan having a comparatively high capacity may be arranged and the dimensions of the duct part may still be kept on an attractive level. A radial fan of the type ebm R2E 225-BD58-22 delivered by the company Ziehl-ebm and having an air feeding capacity of 1000 m³/hour and a power of 150 W is for example advantageously arranged in a duct part having a distance between the front and the rear wall of about 200 mm and a distance between the lateral walls 4, 5 of about 280 mm. The height of the duct part shown in Fig 1 and 2 is then about 400 mm.
A filter 19 for grease and the like is arranged in the first volume part 3, so that downstream this filter a fumes trapping volume part 20 is formed inside the first volume part 3.
At the lower side of the duct part inside this is at the front illuminating means 21 arranged. It is also shown that a throttle member 22 may be arranged in the outlet 17. The throttle member has a motor member 23 integrated therewith and adapted to bring the throttle member between an open position for suction of air from the room in which the stove hood is intended to be located, through the hood opening 2 and out through the outlet 17, and a closed position.
The device has also a control panel 24 for controlling the function of the components included in the stove hood, such as a motor member 23 of the throttle member, the illuminating means 21 as well as the power of the fan 10, in the simplest embodiment only by switching the fan on and off. The fan will usually have 3-4 different speed positions.
It is illustrated in Fig 2 that the control panel 24 may be recessed in a removable lid 25 enabling access to electric connectors and the like behind the control panel.
Furthermore, in the front vertical delimiting wall 14 of the duct part an opening 27 covered by a removable plate 26 is arranged to enable lifting of the fan 10 out of the duct part in a substantially horizontal direction for maintenance and/or replacement. More exactly, the fan is arranged with the impeller thereof rotatably secured to the plate for removal together therewith. In this way it gets possible to remove the fan very easily from the stove hood so as to clean it or maintain it in another way, repair it or replace it. It is only required that means, such as screws, hinges or the like, for the securing of the plate 26 to the wall 14 are loosened, since the fan is only secured to the plate.
The stove hood shown in Figs 1 and 2 is very advantageous, since the duct part accommodates all components necessary for a good function of the stove hood, even a fumes trapping volume part 20 without necessity of any lower hood part. The duct part has at the same time a cross-section being suitable, especially from the aesthetic point of view, for being prolonged upwards by a part of a ventilation duct having the same cross-section.
A stove hood according to a second preferred embodiment of the invention is schematically illustrated in Figs 3 and 4. Only the parts of the construction of the stove hood differing from the embodiment according to Figs 1 and 2 will be described here.
Other parts are provided with the same reference numerals as in Figs 1 and 2. The duct part 1 is in this embodiment prolonged in the air flow path upstream through a hood part 28 tapering upwards towards the duct part and connected thereto. This hood part is only shown in Fig 3. Such a hood part could have an arbitrary appearance, for example be flat, i.e. have a horizontal cross-section being substantially constant in the vertical direction. In a lower region 29 of the hood part close to the hood opening 2 and schematically indicated illuminating means and a control panel therefor and also other components included in the stove hood may for example be arranged. A filter not shown may be arranged inside the hood part or in the first volume part 3. This embodiment is suited for comparatively large stove hoods, where a more extensive illumination of a larger region below the stove hood is required than is possible to obtain by a stove hood according to Figs 1 and 2.
A stove hood according to a third preferred embodiment of the invention is illustrated in Figs 5 and 6. It is here illustrated how the duct part 1 itself is prolonged by a following duct part 30, the length of which is adapted to the distance to the lower end of the duct part 1 and an upper cap or ceiling opening or the like of a ventilation duct through cover plates 31 displaceably arranged outside the duct part 1. A hood part not shown is preferably also arranged at the bottom of this stove hood.
The invention is of course not in any way restricted to the preferred embodiments described above, but many possibilities to modifications thereof will be apparent to a person with skill in the art without departing from the basic idea of the invention as defined in the appended claims.
The fan may for example be arranged at the rear delimiting wall of the stove hood and the first volume may be arranged adjacent to the front wall. The removable plate could in such a case still be arranged on the front wall of the duct part for lifting the fan therethrough after removing a part of the partition wall between the first and the second volume part and loosening of the fan from the rear wall. The rear wall and thereby the delimiting wall of the duct part could theoretically be formed by a wall in the room in which the stove hood is arranged, even if this is hardly desired.
Another type of throttle member than one driven by a motor, such as a mechanically controllable one, could be arranged. It is also possible to reconstruct the stove hood according to the invention in some operation situations by removing the fan and inserting a throttle member in the opening 9 between the first and the second volume part instead of in the outlet.
"At a substantially vertical delimiting wall" as used in the description and the claims with respect to the location of the fan is to be interpreted as that the fan is not necessarily arranged on the delimiting wall, but it could also be arranged close thereto at a small distance thereto.
"Rectangular" with respect to the cross-section of the duct part of course also comprises the corners perhaps being somewhat chamfered or rounded.
Besides, it is apparent that many features of the embodiments shown in the Figures may be combined with each other so as to form other embodiments of the invention.

Claims

A stove hood having a lower hood opening (2) and an outlet (17) arranged on the top for connecting to a ventilation duct for sucking air from a room in which the stove hood is intended to be located, through the hood opening and out through the outlet to the duct, a fan (10) arranged inside the stove hood between the hood opening and the outlet so as to when switched on generate said suction, and a filter (19) for grease and the like arranged upstream the fan with respect to the direction of said suction of air through the stove hood, through which filter the air is intended to be sucked in a switched on position of the fan, characterized in that the fan is a radial fan designed to suck air axially only from a first side (12) directed substantially horizontally, and that the fan is arranged with the side (13) thereof axially seen opposite to said first side at a substantially vertical delimiting wall (14) of the stove hood.
A stove hood according to claim 1, characterized in that a first volume part (3) is arranged in the stove hood in the direction of the air flow therethrough upstream with respect to the fan (10) in the horizontal direction between the fan and a second substantially vertical delimiting wall (16) of the stove hood located opposite to said delimiting wall (14).
A stove hood according to claim 2, characterized in that said first volume part (3) is restricted with respect to the downstream side of the fan through a substantially vertical partition wall (8) inside the stove hood having an opening (9) directed substantially horizontally directly in front of the fan (10), which is arranged in the second volume part (15) in the stove hood formed by said partition wall, said second volume part being except for the opening to the first volume part only open to the outlet (17).
A stove hood according to claim 3, characterized in that the fan (10) is designed to generate an overpressure in said second volume part (15) for forcing air out through the outlet (17).
A stove hood according to claim 4, characterized in that the fan (10) has an impeller with large blades (16) each extending transversally to the axis of the impeller over a distance being in the same order of magnitude as the radius of the impeller.
A stove hood according to any of the preceding claims, characterized in that the fan (10) is surroundingly open in the radial direction out from the impeller for forcing air moved by blades (16) of the impeller out.
A stove hood according to any of the preceding claims, characterized in that the impeller of the fan (10) is arranged inside the stove hood in a space (15) delimited radially in the horizontal direction by walls (4, 5) of the stove hood.
A stove hood according to any of the preceding claims, characterized in that it comprises a duct part (10) having a substantially rectangular cross-section and adapted to be arranged substantially vertical and inside which the fan (10) is arranged.
A stove hood according to claim 8, characterized in that a vertical delimiting wall (14) of the duct part has an opening (27) covered by a removable plate (26) designed to enable a lifting of the fan out of the duct part (1) in a substantially horizontal direction for maintenance and/or replacement.
A stove hood according to claim 9, characterized in that fan (10) is with the impeller rotatably secured to said plate (26) for removal together therewith.
A stove hood according to claim 9 or 10, characterized in that said opening (27) for lifting the fan (10) out is arranged in a wall (14) of the duct part adapted to form a front wall with respect to the arrangement of the stove hood in a said room.
A stove hood according to any of the preceding claims, characterized in that it comprises a hood part (28) tapering upwards and defining the hood opening (2) at the bottom thereof.
A stove hood according to claim 2, characterized in that the filter (19) is arranged in the first volume part (3).
A stove hood according to claim 2, characterized in that the filter (19) is arranged upstream the first volume part (3) with respect to the suction direction.
A stove hood according to any of the preceding claims, characterized in that it comprises a throttle member (22) controllable between an open position for suction of air from the room in which the stove hood is intended to be located, through the hood opening (2) and out through the outlet (17), and a closed position.
A stove hood according to claim (15) characterized in that the throttle member (22) is arranged downstream the fan (10) in said outlet (17).
A stove hood according to claim 15 or 16, characterized in that it comprises a motor member (23) integrated in the throttle member (22) and arranged to bring the throttle member between said two positions and a control arrangement (24) adapted to regulate the throttle member by sending control signals to the motor member.
A stove hood according to claim 8, characterized in that it comprises means (21) for illuminating a space in said room under the stove hood, and that the illuminating means are arranged inside the duct part (1) at the lower side thereof.
A stove hood according to claim 8, characterized in that a control panel (24) for controlling the function of components of the stove hood is arranged on a front wall (14) of the duct part (1).
A stove hood according to claims 18 and 19, characterized in that the control panel (24) comprises means for controlling the illuminating means (21).
A stove hood according to claims 17 and 19, characterized in that the control panel (24) comprises means for controlling the motor member (23) of the throttle member (22).
A stove hood according to claim 19, characterized in that the control panel (24) comprises means for controlling the power of the fan (10).