CN105408637B

CN105408637B - Housing for radial fan of range hood

Info

Publication number: CN105408637B
Application number: CN201480014606.9A
Authority: CN
Inventors: C.霍伊西格; D.约尔丹; E.毛雷尔
Original assignee: BSH Home Appliances Co Ltd
Current assignee: BSH Home Appliances Co Ltd
Priority date: 2013-03-11
Filing date: 2014-02-21
Publication date: 2020-01-17
Anticipated expiration: 2034-02-21
Also published as: EP2971792B1; CN105408637A; WO2014139780A1; EP2971792A1; DE102013204144A1

Abstract

The invention relates to a housing (1) for a radial fan (2) of a range hood (3), having an air inlet (7, 8) which is delimited by a rim (5) which has at least one stiffening rib (30, 31, 32, 33, 36, 41, 42).

Description

Housing for radial fan of range hood

Technical Field

The invention relates to a housing for a radial fan of a range hood.

Background

DE 9016767U 1 describes, for example, a range hood with a radial fan. The radial fan includes a housing and a fan motor. The ventilator motor is held on the housing by means of a motor suspension. The motor suspension includes three arms, which are respectively flanged to the housing. The arms extend from their respective fastening sections on the housing into a ventilator wheel which surrounds the ventilator motor. The housing is embodied as a double-flow spiral housing. The sucked-in air flows substantially axially into the housing via the air inlet on both sides of the fan wheel and is discharged radially with a higher pressure via the air outlet.

It is generally known that such housings vibrate during operation of the radial fan and can generate disturbing noise in this case. At the same time, it is expedient to close the air inlet as little as possible, in particular in order not to reduce the efficiency of the radial fan.

Disclosure of Invention

The object of the present invention is therefore to provide a housing for a radial fan of a range hood, which housing generates as little disturbing noise as possible during operation and is at the same time highly efficient.

Accordingly, a housing for a radial fan of a range hood with an air inlet is proposed. The air inlet is defined by a rim having at least one strengthening rib.

Advantageously, the at least one stiffening rib reduces the vibrations of the housing, thereby generating less disturbing noise. Furthermore, such a stiffening rib is arranged such that it only disturbs the air flow to a lesser or no extent in the event of an air flow into the air inlet.

In other words, the reinforcing ribs are exposed on the rim, i.e., protrude on the rim. By "edge" is meant a face which directly abuts on the air inlet, that is to say on a corresponding opening in the housing in which the ventilator wheel is arranged. A plurality of reinforcing ribs can be provided. The reinforcing ribs cover less than 50%, preferably less than 80% and further preferably less than 90% of the edges.

Furthermore, the radial fan can be designed as a double-flow radial fan. In this case, the housing has two opposing air inlets. Each air inlet can be defined by a rim having at least one strengthening rib.

The range hood is constructed as a household appliance.

According to one embodiment, the housing comprises a helical body having an air inlet and a rim. A helical, self-widening annular chamber is formed in the body, which surrounds the fan wheel and extends to the air outlet.

According to a further embodiment, the helical body is formed in the form of a helical cylinder, which forms a rim on its end face. The end face preferably extends radially to the axis of rotation of the ventilator wheel. The peripheral surface formed between the end surfaces is pierced, for example, by air outlets. Furthermore, the circumferential surface can have a separating surface between the two half shells forming the housing.

According to another embodiment, the air inlet is implemented circularly. The at least one stiffening rib extends radially with respect to the central axis of the air inlet or parallel to a radial line with respect to the central axis. Such strengthening ribs are adapted to direct the air flow towards the air inlet and in particular not to close the air inlet. At the same time, such stiffening ribs serve to stiffen the housing, in particular the edges.

According to another embodiment, at least one strengthening rib extends helically in the same direction as the helical body. In other words, the at least one reinforcing rib defines a section of a spiral which has a helical course in the same direction of rotation as the helical body.

According to another embodiment, at least one strengthening rib directly abuts the air inlet. Thereby, the air flow can be introduced into the air inlet without swirling.

According to another embodiment, at least one strengthening rib extends towards the air outlet of the housing. In particular, the reinforcing ribs can extend along a flange portion that connects the tube defining the air outlet with the helical body.

According to another embodiment, the at least one reinforcing rib extends as far as past the circumferential surface of the helical cylinder. This also strengthens the envelope surface.

According to another embodiment, at least one stiffening rib extends in the form of an annular section on the edge.

According to another embodiment, at least one reinforcing rib is thickened according to the length of the reinforcing rib. In this way, different regions of the edge can be simply reinforced as required.

According to a further embodiment, the rim has at least one fastening point for fastening the motor suspension, which fastening point is surrounded by at least one reinforcing rib. Thereby avoiding backspin in the region of the fastening point. At the same time, the reinforcing ribs can also serve as positioning aids. The motor mount can be flanged to the fastening point, in particular by means of bolts.

According to another embodiment, at least one strengthening rib extends around the fastening portion in the form of a semicircular bend. A better protection of the fastening point is thereby obtained, so that only small air swirls are formed here. The respective semi-circle can be configured open to the air inlet.

According to another embodiment, the housing consists of two half-shells, which are axially connected to each other. A further reinforcing rib is formed along the parting plane. The stiffening ribs are able to receive sealing portions which seal the two half-shells against one another.

Furthermore, a range hood with a radial ventilator is provided. The range hood is provided with the shell.

According to one embodiment, a ventilator wheel and a ventilator motor driving the ventilator wheel are arranged in the housing. The at least one stiffening rib is curved in the direction of rotation of the fan wheel during operation of the radial fan. The curvature is understood here such that the at least one stiffening rib is curved away from the radial line (with respect to the axis of rotation of the ventilator wheel) in the direction of rotation. Thereby, the convolution and thus the noise formation can be reduced.

Other possible implementations of the invention also include combinations of features or embodiments of the housing or of the extractor hood not explicitly mentioned, previously or hereafter described in connection with the exemplary embodiments. In this case, the person skilled in the art would also add or modify individual aspects as a modification or addition to the corresponding basic form of the invention.

Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the embodiments of the invention described below. Further, the present invention is specifically explained by means of preferred embodiments with reference to the accompanying drawings.

Drawings

Wherein:

FIG. 1: in a perspective view, a housing for a radial fan of a range hood is shown; and is

FIG. 2: a range hood with a radial ventilator is shown in a perspective view in a cut-away section.

In the drawings, identical or functionally identical elements are provided with the same reference numerals, unless otherwise specified.

Detailed Description

Fig. 1 shows a perspective view of a housing 1 of a radial fan 2 shown in fig. 2 for a schematically illustrated range hood 3.

The housing 1 comprises a helical body 4 with an end face 5, which is in the form of a helical cylinder (only the front end face 5 is visible in fig. 1 for the sake of illustration). Between the end faces 5, the body 4 forms a peripheral face 6. The end faces 5 each form an edge which defines an

air inlet

7, 8.

The

air inlets

7, 8 are opposed to each other. The

air inlets

7, 8 can each be designed as a circular opening with a central axis 11. A helically widened annular chamber 12 is formed in the interior of the helical body 4, which chamber widens out to a radial air outlet 13. The air outlet 13 can be defined by a tube 14 which is connected to the circumferential surface 6 of the helical body 4 via a flange portion 15.

The housing 1 can be composed of two

half shells

16, 17, which are connected to one another axially along a parting plane 18. The "axial direction" is in the present case with reference to the central axis 11, which is identical to the axis of rotation of the fan motor 21 shown in fig. 2. The separating surface 18 extends radially to the central axis 11.

The edge 5 can also have, for example, three fastening points 22 for the flange connection of the motor suspension 23 shown in fig. 2. The motor suspension 23 can have, for example, three support arms 24, which are connected, for example, in one piece, to a receptacle 25 for the fan motor 21. The receptacle 25 holds a rotor (not shown) of the ventilator motor 21 in a rotatable manner relative to a stator 26 of the ventilator motor 21. The motor suspension 23 can thus also form a bearing cap for the ventilator motor 21. In particular, the support arm 24 is designed such that it holds the fan motor 21 (in particular the rotor and the stator 26 here) coaxially to the central axis 11. The central axis 11 is at the same time the axis of rotation of a fan wheel 27 arranged in the housing 1, which fan wheel is driven by the fan motor 21. Furthermore, the carrying arm 24 also positions the ventilator motor 21 axially (with respect to the central axis 11) within the ventilator wheel 27 and thus also within the housing 1.

Returning now to fig. 1, it is shown there that the edge 5 can have a plurality of, for example more than ten, stiffening ribs. The reinforcing rib formation is in the form of a tab and accommodates, for example, less than 95% of the face of the rim 5. For example, several strengthening ribs are described in detail below and are also indicated at 30, 31, 32, 33, 36, 41 and 42.

The reinforcing ribs 30 can extend radially (with respect to the central axis 11).

For example, the reinforcing ribs 31 extend parallel to the radial line 34 (with respect to the central axis or the rotational axis 11).

The reinforcing ribs 32 are curved helically about an axis of rotation indicated at 35 and are specifically co-directional with the helical body 4. It can also be seen that the reinforcing ribs 32 extend not only over the edge 5 but also over the circumferential surface 6.

The reinforcing ribs 33 extend from the rim 5 through the flange portion 15.

Fig. 1 also shows a reinforcing rib 36, which is formed along the separating plane 18 between the two

half shells

16, 17. The reinforcing rib 36 can have a groove for a seal for sealing the two

half shells

16, 17 against one another. The reinforcing ribs 36 thus also extend along the peripheral face 6 of the body 4.

The direction of rotation of the ventilator wheel 27 is indicated by 37 in fig. 1. A plurality of stiffening ribs, for example depicted as stiffening ribs 36, curve away from the radial line 34 in the direction of rotation 37 of the ventilator wheel 27.

Fig. 1 also shows semicircular reinforcing ribs 41, which each surround the fastening point 22. The semi-circle formed is open toward the air inlet 7.

The previously described stiffening

ribs

30, 31, 32, 33 and 41 generally adjoin the air inlet 7 directly.

Fig. 1 also shows a reinforcing rib 42, which extends in sections annularly around the central axis 11. Furthermore, the reinforcing rib 42 can be thickened according to its length, as is also illustrated for the reinforcing rib 42 in fig. 2. The stiffening ribs 42 likewise extend over the edge 5 of the housing 1.

Although the present invention has been described in terms of embodiments, the present invention can be variously modified.

List of reference numerals

1 casing

2 radial ventilator

3 cooking fume exhauster

4 main body

5 end face

6 enclosing surface

7 air inlet

8 air inlet

11 central axis

12 annular cavity

13 air outlet

14 tubes

15 flange part

16 half shell

17 half shell

18 plane of separation

21 ventilator motor

22 fastening part

23 Motor suspension

24 carrying arm

25 accommodating device

26 stator

27 ventilating device wheel

30 reinforced rib

31 reinforcing rib

32 reinforced rib

33 reinforced rib

34 radial line

35 axis of rotation

36 reinforced rib

37 direction of rotation

41 reinforced rib

42 reinforced rib

Claims

1. Housing (1) for a radial fan (2) of a range hood (3), having an air inlet (7, 8) which is delimited by a rim (5) having at least one stiffening rib (32, 36), wherein the housing (1) has a helical body (4) having an air inlet (7, 8) and a rim (5), at least one stiffening rib (32, 36) extending helically in the same direction as the helical body (4), at least one stiffening rib (32, 36) directly adjoining the air inlet (7, 8), at least one stiffening rib (42) thickening as a function of its length, the rim (5) having at least one fastening point (22) for fastening a motor suspension (23) of the radial fan (2), which fastening point is surrounded by at least one semicircular stiffening rib (41), the semi-circle formed is open towards the air inlet (7).

2. Housing according to claim 1, characterized in that the helical body (4) is configured in the form of a helical cylinder which forms the edge on its end face (5).

3. Housing according to claim 1 or 2, characterized in that the air inlet (7, 8) is of circular design and the at least one stiffening rib (30, 31) extends radially with respect to the center axis (11) of the air inlet (7, 8) or parallel to a radial line (34) with respect to the center axis (11).

4. Housing according to claim 1 or 2, characterized in that at least one stiffening rib (33) extends towards the air outlet (13) of the housing (1).

5. Housing according to claim 2, characterized in that at least one reinforcing rib (32, 36) extends over the circumferential surface (6) of the helical shaft (4).

6. Housing according to claim 1 or 2, wherein at least one stiffening rib (42) extends in the form of an annular section on the rim (5).

7. Housing according to claim 1, characterized in that at least one stiffening rib (41) extends around the fastening portion (22) in the form of a semicircular bend.

8. Housing according to claim 1 or 2, characterized in that the housing (1) consists of two half-shells (16, 17) which are axially connected to one another and which form a further stiffening rib (36) along the separating surface (18).

9. Ventilator (3) with a radial fan (2) having a housing (1) according to any one of claims 1-8.

10. A ventilator according to claim 9, characterized in that a ventilator wheel (27) and a ventilator motor (21) driving the ventilator wheel (27) are arranged in the housing (1), and that the at least one strengthening rib (32, 36) is curved in the direction of rotation (37) of the ventilator wheel (27) during operation of the radial ventilator (2).