EP3232127A1 - Extractor hood with outlet grid - Google Patents

Abstract

The present invention relates to an extractor hood comprising an extractor housing (10) with a blower (12) arranged therein and an outlet grille (13) which is arranged on an air outlet opening of the extractor hood (1). The outlet grill (13) has at least one air guiding member (130) for aligning the air passing through the outlet grill (13) in a direction different from the direction of the surface normal of the outlet grill (13), and the outlet grill (13) is in at least two angular positions about an axis (A), which is in the surface center of the outlet grille (13) in the direction of the surface normal of the outlet grille, attachable to the extractor housing (10).

Description

The present invention relates to an extractor hood with a fume hood, a blower and an outlet grille.

In extractor hoods, a fan is provided, is sucked through the air in the hood and in particular in the extractor housing and through which the air can be discharged into an exhaust pipe or in the vicinity of the hood. In particular, for extractor hoods that can be operated in recirculation mode, it is known to prevent contact of the user with rotating elements of the blower, in particular the fan by a discharge grille is provided on the hood. In addition to the function of the intervention protection, the outlet grille can preferably also serve for the air conduction of the air exiting the extractor hood.

A disadvantage that exists in such known outlet grilles is that the spatial conditions around the hood vary from kitchen to kitchen. For example, the ceiling height is lower in some kitchens than others, or a room wall is located closer or farther to the hood. With the known outlet grilles, the spatial conditions can not be taken into account, which can lead to an impairment of the user's sensation and possibly to a deterioration of the efficiency of the extractor hood.

Object of the present invention is therefore to allow an individual adjustment of the air outlet from a cooker hood, by means of which the spatial conditions around the hood can be taken into account.

The invention is based on the finding that this object can be achieved by the orientation of the outlet grille can be changed at least partially.

The invention therefore relates to an extractor hood comprising a fume hood housing with a fan arranged therein and an outlet grille which is arranged on an air outlet opening of the fume hood. The air outlet opening is the opening through which air is emitted from the extractor hood into the area of the extractor hood. This may in particular be the end of an exhaust air outlet of the blower or a separate opening in the extractor housing. The extractor hood is characterized in that the outlet grille comprises at least one air guiding element for aligning the air passing through the outlet grille in a direction deviating from the direction of the surface normal of the outlet grille, and the outlet grating in at least two angular positions about an axis located in the center of the plane the outlet grille is in the direction of the surface normal of the outlet grille, to which the extractor housing can be fastened.

An extractor hood is a device by means of which air is sucked in and in particular from a hob. The hood is usually mounted above the hob on a room wall or ceiling. The extractor hood includes a fume hood. In the extractor housing at least one suction opening is formed, can be sucked through the air in the hood. In the extractor housing to a blower is arranged. The fan preferably consists of a fan with a fan and a fan housing and the fan in particular closely surrounding fan housing, which may be for example a spiral housing.

In addition, the extractor hood according to the invention on an outlet grille, which can also be referred to as exhaust grille. An outlet grille is a component which is at least partially permeable to air and in which grids are preferably arranged in at least one direction so that access through the outlet grille into the interior of the extractor housing is prevented. The outlet grille comprises at least one air guide element. The air guide element preferably represents a grid element and may also be referred to as a plate. The air guide serves to align the air that is emitted through the outlet grille. For this purpose, the at least one air-guiding element is preferably pivotable in at least one direction or is curved in at least one direction. According to the invention, the at least one air-guiding element is at least temporarily aligned so that this one Air flow in a direction which deviates from the direction of the surface normal of the outlet grille generated.

The outlet grille is attached to an outlet opening of the extractor hood. The outlet opening in this case preferably represents the opening through which the air is discharged from the extractor hood into the environment of the extractor hood.

The extractor hood is characterized in that the outlet grille can be fastened to the extractor hood in at least two angular positions about an axis lying in the center of the area of the outlet grille in the direction of the surface normal of the outlet grille.

As fixed to the extractor housing, a direct connection between the outlet grille and the extractor housing but also an indirect connection for example via the fan and / or an outlet port is called.

The outlet grille preferably represents a flat component with a circular surface. As an axis of the outlet grille, in the case of an outlet grating having a circular surface, the axis is denoted which runs through the center of the circular surface perpendicular to the latter. In the case of an outlet grille having an area which deviates from the circular shape and is configured, for example, as oval or angular, the axis of the outlet grille preferably extends through the centroid of the area.

The outlet grille can be fastened in at least two angular positions about this axis. This means that the outlet grille can be brought into at least two different angular positions with respect to the axis and can be fixed in these angular positions. Preferably, therefore, corresponding fastening means are provided on the outlet grille and / or the extractor hood.

By attaching the outlet grille according to the present invention in different angular positions, the direction in which the air is emitted from the extractor hood can be changed. In particular, with fixed air guide elements in the outlet grille, by rotating the outlet grille and fastening in the rotated position, the direction of the output from the outlet grille Air changed. As a result, in particular a direct oncoming of the user of the hood or an indirect influx can be prevented by a reflected from the ceiling or a room wall airflow. In addition, the efficiency of the extractor hood can be increased by changing the angular position of the outlet grille. Namely, a direct flow of a space wall located in the vicinity of the outlet grille, a flow resistance can be generated, which can lead to a reduction in the efficiency of the hood.

According to a preferred embodiment, the angular position of the outlet grille can be adjusted continuously and the outlet grille can be fixed in the set angular position. In particular, the angular position over a certain angular range can be adjusted continuously. In these embodiments, therefore, the outlet grille can be precisely brought to the desired angular position.

According to one embodiment, the outlet grille is fastened to the extractor housing by means of a recessed connection, in particular a bayonet connection. Preferably, the outlet grille has at least one bayonet projection and / or a bayonet recess and the extractor housing corresponding to at least one bayonet recess and / or a bayonet projection. By means of this embodiment, a fixing of the outlet grille in different angular positions can be realized in a simple manner. After inserting the bayonet projection into the bayonet recess, the outlet grille may be twisted and automatically fastened by the bayonet catch. In this embodiment, the outlet grille can thus be brought and fixed in the desired angular position, for example in an angular range between two bayonet recesses. The bayonet projections and / or bayonet recesses on the outlet grille are preferably provided on the outer circumference of the outlet grille, in particular on a frame of the outlet grille, which constitutes a ring. The bayonet projections and / or bayonet recesses on the extractor housing may be provided in the extractor housing at the periphery of a passage opening for at least a portion of the outlet grille. Alternatively or additionally, the bayonet projections and / or a bayonet recesses may be provided on the extractor housing at an outlet nozzle, which is provided for example on the fan.

According to a further embodiment, at least one oblong hole which describes a pitch circle is provided on the extractor housing and / or the outlet grille. Through the slot preferably a screw is guided. Also by this configuration, the outlet grille can be rotated in certain angular ranges. The screw runs along the slot. In the desired angular position, the outlet grille can then be secured by tightening the screw. It can also be provided several slots and a plurality of screws for alignment and attachment of the outlet grille.

According to a preferred embodiment, the extractor housing has an outlet nozzle and the outlet grille is attached to the outlet nozzle. The outlet port may connect to an air outlet passage of the fan or be formed by an end of the air outlet passage. The outlet nozzle preferably protrudes upward beyond the extractor housing. In this way, this is easily accessible and the orientation of the outlet grille can therefore be easily changed by the user of the hood. Alternatively to the attachment of the outlet grille to the outlet nozzle, the outlet grille can also be fastened in the vicinity of the outlet nozzle, for example on a cover wall of the extractor housing.

According to one embodiment, at least one of the air guiding elements of the outlet grille is pivotably mounted about the direction of its longitudinal extent. The air guide elements, which act as grating elements, may be, for example, fins. The longitudinal direction is the direction in which the air guide element has the largest dimension. Preferably, the at least one air guide is pivotally mounted in the middle of its height dimension at the longitudinal ends. By the or the air guide element (s) can be pivoted, in addition to the invention adjustable discharge direction of the outlet grille and the angle at which the air is discharged from the outlet grille can be adjusted. As a result, the ambient conditions of the hood and the wishes of the user can be better taken into account. Preferably, with an outlet grate comprising a plurality of air guide elements, all the air guide elements can be pivoted simultaneously and to the same extent.

The at least one air guiding element can be fixed in at least one pivoting position. The fixing can be done by separate fixer, such as detents. However, it is also within the scope of the invention that the one or more air guide elements are fixed in a set pivot position by friction on the bearings in which they are pivotally mounted.

According to a preferred embodiment, the at least one air guiding element is curved about the direction of the longitudinal extent or in the direction of the longitudinal extent. In this case, the direction of the longitudinal extension means that the radius of curvature is perpendicular to the direction of the longitudinal extent. A curvature in the direction of the longitudinal extension means that the radius of curvature represents the longitudinal extent of the air guide element. By the air guide elements are curved in one direction about the direction of the longitudinal extent, in particular a vertical blowing of the air can be prevented. This is particularly advantageous in the case of extractor hoods which are arranged in the vicinity of a room ceiling and in which the outlet grille is provided in the top of the extractor hood. A vertical blowing out of the air would in this case lead to a reflection of the air flow and a return flow in the direction of the outlet grille. A curvature in the direction of the longitudinal extent of the air guiding element allows, in addition to an optionally possible pivoting of the air guiding elements, a blowing of the air stream directed towards one side of the outlet grille.

The outlet grille is preferably attached to the top of the extractor housing. The exhaust grille can be applied to a top wall of the extractor housing or at least partially introduced into this.

The advantages of the present invention can be used in particular in an extractor hood, which represents a recirculation hood. In fact, with this type of hood, the return of all the purified air to the room where the cooker hood is operated is required. The air flow is therefore strong and directed to the user of the hood blowout must therefore be prevented. This is possible with the extractor hood according to the invention. However, the present invention can also be implemented in extractor hoods that allow, for example, switching between recirculation and exhaust air operation.

Figur 1:

eine schematische Blockdarstellung einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube;

Figur 2:

eine schematische Schnittdarstellung durch eine Ausführungsform eines Auslassgitters einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube;

Figur 3a:

eine schematische Draufsicht auf eine Ausführungsform eines Auslassgitters einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube in einer ersten Winkelposition;

Figur 3b:

eine schematische Draufsicht auf eine Ausführungsform eines Auslassgitters einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube in einer zweiten Winkelposition;

Figur 4a:

eine schematische Darstellung des Luftstroms bei einem Auslassgitter in einer ersten Winkelposition;

Figur 4b:

eine schematische Darstellung des Luftstroms bei einem Auslassgitter in einer zweiten Winkelposition;

Figur 5:

eine schematische Perspektivansicht einer weiteren Ausführungsform eines Auslassgitters einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube;

Figur 6:

eine schematische Perspektivansicht einer weiteren Ausführungsform eines Auslassgitters einer Ausführungsform der erfindungsgemäßen Dunstabzugshaube;

Figur 7:

eine schematische Prinzipdarstellung einer ersten Ausführungsform einer Bajonettverbindung; und

Figur 8:

eine schematische Prinzipdarstellung einer zweiten Ausführungsform einer Bajonettverbindung.

The invention will be explained in more detail below with reference to the accompanying drawings. Show it:

FIG. 1:

a schematic block diagram of an embodiment of the extractor hood according to the invention;

FIG. 2:

a schematic sectional view through an embodiment of an outlet grille of an embodiment of the extractor hood according to the invention;

FIG. 3a:

a schematic plan view of an embodiment of an outlet grille of an embodiment of the extractor hood according to the invention in a first angular position;

FIG. 3b:

a schematic plan view of an embodiment of an outlet grille of an embodiment of the extractor hood according to the invention in a second angular position;

FIG. 4a

a schematic representation of the air flow at an outlet grille in a first angular position;

FIG. 4b:

a schematic representation of the air flow at an outlet grille in a second angular position;

FIG. 5:

a schematic perspective view of another embodiment of an outlet grille of an embodiment of the extractor hood according to the invention;

FIG. 6:

a schematic perspective view of another embodiment of an outlet grille of an embodiment of the extractor hood according to the invention;

FIG. 7:

a schematic diagram of a first embodiment of a bayonet connection; and

FIG. 8:

a schematic diagram of a second embodiment of a bayonet connection.

In FIG. 1 a schematic block diagram of an embodiment of the extractor hood 1 according to the invention is shown. The extractor hood 1 in this case consists of a vapor-extraction housing 10 and a vapor shield 11 arranged below the vapor-extraction housing 10. A blower 12 is arranged in the vapor-extraction housing 10. Of the blower 12, only the blower housing 120, which is a volute casing, is shown. The blower housing 120 has an air outlet channel 121, which is directed vertically upwards in the embodiment shown. At the upper end of the air outlet passage 121 of the blower housing 120 of the blower 12, in the illustrated embodiment, an air outlet port 122 is disposed, which may be connected to the end of the air outlet passage 121, or formed through the end of the air outlet passage 121. The air outlet nozzle 122 preferably protrudes beyond the top of the extractor housing 10 through a passage opening and thereby forms the air outlet opening of the extractor housing. In the air outlet opening, in particular the opening of the air outlet nozzle 122, an outlet grille 13 is arranged.

In FIGS. 2 and 3 For example, embodiments of the outlet grille 13 are shown. In the FIGS. 3a and 3b the outlet grille 13 consists of a frame 132 which has a circular shape, as well as of grid elements 135. The grid elements 135 in the illustrated embodiment, air guide elements 130 which extend in the diagonal direction in the frame and which are arranged parallel to each other. The outlet grille 13 thus has an area bounded by the frame 132 and forming a circular area. Through the center of the surface extends in the direction perpendicular to the surface of the outlet grille 13, the axis A, around which the outlet grille 13 can be rotated in different angular positions. In the FIG. 3b is the outlet grille 13, for example, at an angle of 90 ° to the in FIG. 3a arranged alignment arranged. As in Figure 3a and 3b indicated schematically, the discharge direction is changed by 90 ° by such a rotation.

In the in FIG. 2 As shown embodiment of the outlet grille 13, this also consists of a frame 132, which preferably represents a ring and grating elements 135, which are elongated air guide elements 130 in the embodiment shown, which may also be referred to as slats. The air guide elements 130 are pivotally mounted in the embodiment shown. This is in FIG. 2 schematically indicated by the bearings 131 and the pivoting movement S. In the in FIG. 2 shown swivel position of the air guide elements 130 is output from the bottom of the outlet grille 13 air flow to the upper right. This is in FIG. 2 schematically indicated by the arrow L. If the air guide elements 130 from the in FIG. 2 pivoted pivoted position shown to the left, the air flow L can be output to the top left.

In FIGS. 4a and 4b the influence of different orientations of the outlet grille 13 with respect to the air flow L output by it is shown schematically. In the FIGS. 4a and 4b Therefore, schematic plan views are shown on an extractor hood and located in front of the hood user B user. In the FIG. 4a is the outlet grille 13, of which in the FIG. 4a only the frame 132 is shown, aligned so that the air flow L is discharged from this forward. Thus, the air flow L is applied directly to the user of the extractor hood 1. In the FIG. 4b the outlet grille 13 is rotated about the axis A by 45 ° to the right. The outlet grille 13 can be fixed in this position. In the selected orientation, it can be seen that the air flow L continues to be discharged forward but tilted to one side. As a result, the air flow L no longer flows directly to the user, but is guided past this.

In FIG. 5 a further embodiment of the outlet grille 13 used according to the invention is shown. In this embodiment, the outlet grille 13 also has a round cross-section. In particular, the outlet grille 13 consists of an annular frame 132 in which grid elements 135 are arranged. The grating elements 135 are in this embodiment, on the one hand air guide elements 130 and the other cross struts 134 through which the air guide elements 130 are held. The air guide elements 130 in the embodiment after FIG. 5 In particular, the air guiding elements 130 are curved in the embodiment shown both in the direction of its longitudinal extent and about the direction of the longitudinal extent. In plan view the air guide elements 130 in the form of a circular arc and the air guide elements are curved over the height thereof.

At the outlet grille 13 in FIG FIG. 5 schematically shown fastening means 133, which represent bayonet projections in the illustrated embodiment. The fastening means 133 are arranged distributed on the outside of the frame 132 over the circumference of the frame 132. If the outlet grille 13 is introduced into an opening, for example an outlet connection 122 of the extractor housing 10, this is preferably carried out such that the attachment means 133 are introduced in the form of bayonet projections into further attachment means (not shown) in the form of bayonet recesses. By rotating the outlet grille 13 with respect to the extractor housing 10, the bayonet projections then enter a region in which no bayonet recess is present, and the outlet grille 13 is fastened to the extractor housing 10. However, the outlet grille 13 may continue to be rotated about the axis A until the bayonet projections reach the next circumferentially provided bayonet recesses.

In FIG. 6 a further embodiment of a discharge grille 13 is shown. This embodiment differs from that in FIG FIG. 5 shown embodiment in that the grid elements 135, the air guide elements 130, are bent in the longitudinal extent U-shaped and the cross braces 134 are formed as rings. In addition, in this embodiment, screw fasteners 133 are distributed on the circumference of the outlet grille 13 as fastening means 133. This embodiment of the outlet grille 13 can be screwed, for example, on the top, in particular on the top wall of the extractor housing 10, For this purpose, elongated holes can be provided in the top wall, which represent circular arcs. Within the angular range of a circular arc, the outlet grille 13 can be rotated while the screw is already passed through the Schraublasche but not yet tightened. Once the outlet grille 13 has been rotated to the desired angular position, the screws can then be tightened.

In FIG. 7 is a schematic schematic diagram of a first embodiment of a bayonet connection for alignment and attachment of the outlet grille 13 to an outlet port 122 of the extractor housing 10 is shown. In the lower part of the FIG. 7 is a Outlet port 122 shown with a bayonet recess 123. Preferably, however, more than one bayonet recess 123 is provided at the upper edge of the outlet nozzle 122. The bayonet recess 123 has an L-shape, with a vertical region merging from the top edge of the outlet nozzle 122 into a horizontally extending region parallel to the top edge of the outlet nozzle 122. In the upper area of the FIG. 7 an outlet grille 13 is shown, on which a fastening means 133 in the form of a bayonet projection 136 is provided. In the illustrated embodiment, the bayonet projection 136 is a pin that extends radially outwardly from the frame 132 of the outlet grille 13.

If the bayonet projection 136 is aligned with the bayonet recess 123 of the outlet nozzle 122, then the bayonet projection 136 may be inserted into the bayonet recess 123. By rotating the outlet grille 13, the bayonet projection 136 can then be moved in the horizontal part of the bayonet recess 123 over the angular range that covers the horizontal area and so the orientation of the outlet grille 13 can be adjusted.

In FIG. 8 is a schematic diagram of a second embodiment of a bayonet connection shown. In this embodiment, fastening means 133 in the form of bayonet projections 136, each extending over part of the circumference of the frame 132, are arranged on the outlet grille 13 and in particular on the frame 132. The bayonet projections 136 project radially outward. In the extractor housing 10, a passage opening 100 is provided in this embodiment, through which at least a portion of the outlet grille 13 can be passed. At the periphery of the passage opening 100 bayonet recesses 101 are provided, which correspond to the positions of the bayonet projections 136. In this embodiment, the outlet grille 13 may be inserted into the passage opening 100 with the bayonet projections 136 aligned with the bayonet recesses 101. By rotating the outlet grille 13, the bayonet projections 136 are then brought under the connection areas between two bayonet recesses 101 and the outlet grille 13 is thus held on the extractor housing 10. In this case, the outlet grille can be rotated over the angular range which lies between two bayonet recesses 101, without the bayonet connection between the outlet grille 13 and the extractor housing 10 being released.

With the present invention, an extractor hood is provided which allows a line and steering the exhaust air of the hood. The line and steering is necessary to generate any unwanted dirt on the wall or kitchen furniture. Since there are a variety of kitchens, a customizable cooker hood is a great advantage. This allows the customer to adapt the exhaust air duct according to his needs.

In the extractor hood according to the invention, the entire outlet grate, which is also referred to as outlet grille, in a certain range, in particular angular range about a central axis of the surface of the outlet grate, rotatable, without the outlet grille thereby loses its protective function. An optionally additional adjustment of the angle of the air guide elements of the outlet grille, which can also be referred to as lamellae, makes it possible to adapt the emission angle. The adjustment of the radiation angle, that is the angle at which the air flow exits the outlet grille, is required, for example, in particularly small or shallow kitchens, or when furniture disturbs the blow-out flow.

Through different kitchen designs can also occur effects in which the customer feels a breeze from the side or rear as disturbing. This is not a direct exhaust air flow, but an exhaust air flow reflected from the wall or furniture. The backflow can occur at speeds of, for example, 1 m / s. Here, too, the change according to the invention to the outlet grille, in particular its orientation and, if appropriate, pivoting of the air guiding elements, remedy the situation.

The present invention has a number of advantages. For example, the well-being of the user when cooking can be significantly improved. The user is particularly reliably not disturbed by the exhaust air flow. In addition, the cooker hood can be adapted to any individual kitchen.

LIST OF REFERENCE NUMBERS

1

Hood

10

Extractor housing

100

Port

101

bayonet recess

11

canopy

12

fan

120

fan housing

121

air outlet

122

outlet

123

bayonet recess

13

outlet grill

130

air guide

131

swivel axis

132

frame

133

fastener

134

crossmember

135

grid element

136

bayonet lead

137

Schraublasche

A

Axle outlet grille

L

airflow

S

pivotal movement

B

user

Claims (11)

An extractor hood comprising an extractor housing (10) with a fan (12) arranged therein and an outlet grille (13) arranged at an air outlet opening of the extractor hood (1), characterized in that the outlet grate (13) comprises at least one air guide element (130) Alignment of the air passing through the outlet grille (13) in a direction different from the direction of the surface normal of the outlet grille (13), and the outlet grille (13) in at least two angular positions about an axis (A) in the center of the plane Outlet grille (13) in the direction of the surface normal of the outlet grille is on the extractor housing (10) can be fastened. Extractor hood according to claim 1, characterized in that the angular position of the outlet grille (13) is infinitely adjustable and the outlet grille (13) can be fixed in the set angular position. Extractor hood according to claim 1 or 2, characterized in that the outlet grille (13) has at least one bayonet projection (136) and / or a bayonet recess and the extractor housing (10) corresponding to at least one bayonet recess (101, 123) and / or a bayonet projection. Extractor hood according to one of claims 1 to 3, characterized in that on the extractor housing (10) and / or the outlet grille (13) at least one elongated hole which describes a pitch circle, is provided. Extractor hood according to one of claims 1 to 4, characterized in that the extractor housing (10) has an outlet (122) and the outlet grille (13) is attached to the outlet port (122). Extractor hood according to claim 5, characterized in that the outlet nozzle (122) of the outlet nozzle of the blower (12). Extractor hood according to one of claims 1 to 6, characterized in that at least one air guide element (130) of the outlet grille (13) is pivotally mounted about the direction of its longitudinal extent. Extractor hood according to claim 7, characterized in that the at least one air-guiding element (130) can be fixed in at least one pivoting position. Extractor hood according to one of claims 1 to 8, characterized in that the at least one air guide element (130) is curved about the direction of the longitudinal extent or in the direction of the longitudinal extent. Extractor hood according to one of claims 1 to 9, characterized in that the outlet grille (13) on the upper side of the extractor housing (10) is fixed. Extractor hood according to one of claims 1 to 10, characterized in that the extractor hood (1) represents a recirculation hood.

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