Extractor hood

Description

[0001] The present invention relates to a ventilation device with a blower.

[0002] In extractor hoods, particularly those used in kitchens to remove and purify fumes and vapors from a cooktop, fans are employed to draw the fumes and vapors into the extractor hood. The fan can also be referred to as a ventilator. Radial fans, also known as radial ventilators, are preferably used. Radial fans with forward-curved impeller blades are particularly preferred. This type of radial fan is especially favored due to its good acoustic properties and very compact design.

[0003] In the prior art US 2009 / 247062 A1, a fume hood with a fan is described. This prior art discloses the preamble of claim 1.

[0004] Centrifugal blowers / fans consist of a spiral casing that houses the impeller. The spiral casing has an outlet, which usually features a flange for attaching it to ductwork downstream of the blower / fan. This necessary flange requires installation space.

[0005] Furthermore, in some cases it is necessary to change the cross-section of the outlet downstream of the blower / fan to adapt it to the specific conditions of the extractor hood. This usually requires an adapter that is attached to the blower outlet. This change in cross-section therefore requires additional space within the ductwork of the extractor hood.

[0006] The object of the present invention is therefore to provide a solution by means of which a blower can be flexibly provided in a range hood with the smallest possible installation space requirement.

[0007] The invention is based on the realization that this problem can be solved by constructing the housing of the blower in two parts, with one housing part comprising at least a part of the outlet of the blower.

[0008] According to a first aspect, the invention therefore relates to a fume hood comprising a blower housing with a housing body and an outlet element, wherein the housing body serves to receive a fan wheel, the outlet element extends outwards over the outer circumference of the housing body, and the air outlet opening of the blower housing is provided at the end of the outlet element facing away from the housing body. The blower housing is characterized in that it consists of a first housing part and a second housing part, wherein the dividing plane between the two housing parts lies parallel to a plane in which the central axis of the housing body lies, and the dividing plane lies between the central axis and the air outlet opening of the blower housing, and the second housing part forms at least a part of the outlet element.

[0009] The blower can also be called a fan, and the radial blower can be called a radial fan. Similarly, the blower housing can also be called a fan housing. However, in the following text, the terms blower, blower housing, and radial blower will be used.

[0010] The extraction device in which the blower housing can be used can, for example, be a range hood or a table fan. According to the invention, the housing in which the fan wheel of the blower is received and through which the air drawn in by the fan wheel is directed is referred to as the blower housing. The blower is preferably a radial blower, and the blower housing is also referred to as a spiral housing. The blower housing comprises a housing body and an outlet element. The housing body can also be referred to as the housing body section or spiral, and the outlet element as the outlet nozzle or outlet nozzle section. The housing body serves to receive the fan wheel of the blower. In particular, a receiving chamber with a round or spiral cross-section is formed in the housing body.The central axis of the housing body is the axis in which, when the blower is assembled, the impeller axis lies and is preferably mounted. The housing body preferably has at least one air inlet opening in a surface perpendicular to the central axis of the housing body. Particularly preferably, an air inlet opening is provided on each of the opposite surfaces of the housing body that are perpendicular to the central axis.

[0011] The outlet element is a channel element that extends between the housing body and the air outlet opening of the blower housing. In particular, the outlet element extends outwards beyond the outer circumference of the housing body. Specifically, the outlet element extends beyond the outer circumference in a direction that deviates from the radial direction. Preferably, the outlet element is inclined to the radial direction of the housing body such that the angle between the radial direction and the extension of the outlet element is greater than zero and less than or equal to 90°. The outlet element preferably extends in the tangential direction of the housing body.

[0012] The air outlet opening of the blower housing is located at the end of the outlet element facing away from the housing body. The air outlet opening is the opening through which air leaves the blower housing. Further ducting of the extractor hood can connect to the air outlet opening, through which the air is guided before it leaves the extractor hood.

[0013] According to the invention, the blower housing consists of a first and a second housing part. The two housing parts are separated from each other by a dividing plane. The dividing line between the two housing parts lies parallel to a plane in which the central axis of the housing body lies. The dividing plane lies between the central axis of the housing body and the air outlet opening of the blower housing. Furthermore, the second housing part forms at least part of the outlet element. The first housing part forms at least part of the housing body of the blower housing.

[0014] Because the blower housing consists of two parts, one of which—the second—forms at least part of the outlet element, the blower housing has a modular design. This design facilitates the integration of the blower into various extractor hoods. In particular, the second housing part, which includes at least part of the outlet, can have the outlet geometry required for the specific extractor hood. For example, the cross-section of the air outlet opening and / or the orientation of the outlet element can be adapted to the geometry of the extractor hood, and the second housing part can be selected accordingly.

[0015] According to one embodiment, the transition between the housing body and the outlet element forms a lug at one end in the circumferential direction, and the dividing plane between the two housing parts lies between the lug and the air outlet opening. The lug can also be referred to as a tongue. An opening is present at the transition between the housing body and the outlet element through which air can pass from the housing body into the outlet element. A lug is formed at one end of the transition, and particularly at the circumferential opening, due to the orientation of the outlet element. The lug is located at the end of the opening where the angle between the tangential line of the circumference of the housing body and the extension of the outlet element is acute. In the embodiment where the dividing plane lies between the lug and the air outlet opening, the second housing part comprises only a portion of the outlet element.The remaining part of the outlet element is formed on the first housing part. In this embodiment, only the area of ​​the outlet element where the air outlet opening is located can be specifically selected according to the geometry of the extractor hood, while the first housing part can remain unchanged for different extractor hoods. This reduces the number of different housing parts that need to be provided for different extractor hoods and therefore simplifies inventory management.

[0016] According to the invention, the transition between the housing body and the outlet element forms a lug at one end in the circumferential direction, and the parting line lies between the lug and the central axis of the blower housing. In this invention, the entire outlet element is contained within the second housing part. This further increases the design possibilities of the blower housing while maintaining a simple construction.

[0017] According to another embodiment, the outlet element forms the second housing part. In this case, the housing part can be attached to the transition between the housing body and the outlet element.

[0018] The housing components are preferably detachably connected to one another. This detachable connection can be, for example, a plug connection, a snap-fit ​​connection, or a clip connection. The fact that the housing components are detachable from one another further simplifies flexibility.

[0019] The connection between the housing parts can optionally be designed so that the fan can be suspended from the outlet element. Alternatively, the fan can be attached to the first housing part of the extractor hood, and the connection between the first and second housing parts only needs to bear the operating loads.

[0020] The cross-section of the air outlet opening can be round or rectangular. The shape of the passage opening located between the first and second housing parts is independent of the shape of the air outlet opening. For example, with a rectangular passage opening, a round air outlet opening can be provided on the second housing part, thus adapting it to the geometry of the extractor fan in which the housing is to be used without requiring an adapter.

[0021] According to one embodiment, the second housing part, in which the air outlet opening is provided, consists at least partially of an acoustically damping material. This prevents noise propagation through the blower housing. Because the housing part is made of acoustically damping material, no additional noise-dampening component is necessary, and the design of the blower housing can be further simplified. Furthermore, the second housing part can function as a silencer directly at the noise emission source, namely the blower.

[0022] According to an alternative embodiment, the second housing part, in which the air outlet opening is provided, consists at least partially of an acoustically transparent material. This embodiment is particularly advantageous when the blower is installed in an environment where separate acoustic encapsulation is provided. This minimizes sound emission, as the sound is no longer reflected along the walls of the housing part and thus no longer carried out of the blower via the air outlet opening.

[0023] According to one embodiment, the outlet element has a chamfer. A chamfer is defined as a geometry in which at least one wall of the outlet element extends, at least partially, in a direction inclined to the longitudinal extent of the outlet element. The chamfer can create a transition between the geometry of the inlet opening and the geometry of the air outlet opening. Furthermore, the chamfer can also create a difference between the orientation of the inlet opening and the orientation of the air outlet opening. For example, the air outlet opening can be offset by 90° relative to the inlet opening.

[0024] According to one embodiment, an electronics housing, which can also be referred to as an electronics box or E-box, is provided on the second housing part, where the air outlet opening is located. This creates an extremely compact unit consisting of the fan and the electronics housing. This reduces the number of connecting elements compared to a separate electronics box. Preferably, the second housing part, including the electronics housing, can then be used as a load-bearing unit. According to one embodiment, fastening means for attaching the fan housing to the extractor hood are therefore provided on the electronics housing.

[0025] The advantages and features described with regard to the blower housing also apply - insofar as applicable - to the extractor fan and blower according to the invention, and vice versa.

[0026] The extractor fan preferably has at least one blower, which has a blower housing according to the invention and a fan wheel received in the blower housing.

[0027] The invention is explained again below with reference to the accompanying figures. These show: Figure 1 : a schematic perspective view of an embodiment of a blower housing according to the invention; Figure 2 : a schematic perspective view of the first housing part of the embodiment according to Figure 1 ; Figures 3a and 3b : schematic perspective views of two embodiments of the second housing parts; Figure 4 : a schematic side view of an embodiment of the blower housing according to the invention; and Figure 5 : a schematic side view of another embodiment of the blower housing according to the invention.

[0028] In Figure 1Figure 1 schematically shows a first embodiment of a blower housing 1 according to the invention in perspective view. The blower housing 1 comprises a housing body 10 and an outlet element 11, which is also referred to below as the outlet nozzle. The housing body 10 includes the receiving chamber 100 for a fan wheel (not shown). In the embodiment shown, the housing body 10 consists of two shells that are connected to each other in a plane perpendicular to the axis of the fan wheel. In addition, two air inlet openings 101 are provided on the housing body 10, one of which is located in Figure 1 Only one is visible. The outlet nozzle 11 extends outwards from the outside of the housing body 10. At the end of the outlet nozzle 11 facing away from the housing body 10, the outlet nozzle 11 has an air outlet opening 110. In the embodiment shown, the air outlet opening 110 has a round cross-section.

[0029] The parts of the blower housing 1, namely the housing body 10 and the outlet nozzle 11, are formed by two housing parts 13 and 14. In the illustrated embodiment, the blower housing 1 consists of a first housing part 13, which forms the housing body 10, and a second housing part 14, which forms the outlet nozzle 11. In the illustrated embodiment, an electronics box 15 is integrally formed on the second housing part 14. The electronics box 15 extends partially around the air outlet opening 110 and is integrally formed at the end of the second housing part 14 where the second housing part 14 is connected to the first housing part 13. Fastening elements 150 are provided at the end of the electronics box 15, which is located at the end of the second housing part 14, where the air outlet opening 110 is located, by means of which the electronics box 15 and above it the entire blower housing 1 can be attached to the extractor hood (not shown).

[0030] In Figure 2 The first housing part 13 is shown in perspective view without the second housing part 14. As can be seen from this view, the first housing part 13 has a passage opening 130 with a rectangular cross-section, through which air can pass from the receiving chamber 100 of the first housing part 13 into the outlet nozzle 11 and from there to the air outlet opening 110 (see figure). Figure 1 At the transition between the housing body 10 and the outlet nozzle 11, a lug 12 is formed due to the tangential orientation of the outlet nozzle 11. The parting line T, at which the first housing part 13 meets the second housing part (in Figure 2 (not shown) can be connected, in the illustrated embodiment lies in the direction of flow after the nose 12, that is, between the nose 12 and the air outlet opening 110 formed in the second housing part 14 (see. Figure 1 ).

[0031] In Figures 3a and 3bTwo embodiments of second housing parts 14 are shown, which can be optionally combined with the first housing part 13. Figure 2 can be connected to form a blower housing 1.

[0032] In the embodiment of the Figure 3a The second housing part 14 has an air outlet opening 110 with a rectangular cross-section. The air outlet opening 110 has a larger area than the through-hole 140 located at the opposite end of the second housing part 14, which forms the parting line T connecting the second housing part 14 to the first housing part 13. A flange 16 in the form of a curved wall is provided on the second housing part 14 to create the transition from the smaller through-hole 140 of the second housing part 14 to the air outlet opening 110.

[0033] In the embodiment of the Figure 3bThe second housing part 14 has an air outlet opening 110 with a round cross-section. Furthermore, the air outlet opening 110 is offset from the through-opening 140, which lies in the parting plane T. For the transition from the rectangular through-opening 140 at one end of the second housing part 14 and the round air outlet opening 110 at the other end of the second housing part 14, the following embodiment is provided. Figure 3b Two bends 16 in the form of curved walls are provided.

[0034] In Figure 4Figure 1 shows a schematic side view of an embodiment of the blower housing 1 according to the invention. In this embodiment, the dividing plane T between the first and second housing parts 13, 14 is arranged between the nose 12 on the housing body 10 and the air outlet opening 110. The dividing plane T lies parallel to an imaginary plane in which the central axis A of the housing body 10 lies. Therefore, in this embodiment, the second housing part 14 includes a portion of the outlet nozzle 11.

[0035] In Figure 5 A further embodiment of the blower housing 1 according to the invention is shown. In this embodiment, the dividing plane T between the first and second housing parts 13, 14 lies between the central axis A of the housing body 10 and the nose 12. In this embodiment, the second housing part 14 therefore comprises the entire outlet nozzle 11 and a part of the housing body 10.

[0036] The present invention thus achieves an optimization of the necessary installation space and the modularity of the blower housing.

[0037] According to one embodiment, the invention relates to a fume hood with a blower housing in the form of a spiral housing in which a fan wheel, which is part of a machine, can be arranged, with an additional separating plane through the blower housing, in particular the spiral housing. The separating plane can be designed such that the separation preferably occurs from the nose, which can also be referred to as the spiral tongue. Alternatively, the separation can also occur before the spiral tongue, and the spiral tongue is part of the second housing part.

[0038] Preferably, the outlet element, which can also be referred to as the spiral outlet, is formed in a separate component, namely the second housing part, up to the air outlet opening, which may also have a connection flange. This component, or second housing part, can be individually adapted to the blower's installation location to save space by implementing necessary cross-sectional changes of the outlet directly in the second housing part.

[0039] The invention offers significant advantages in terms of its modularity for integration into various target applications. For example, a round air outlet opening can be omitted for recirculating extractor hoods. For ducted extractor hoods, a round air outlet opening, particularly the standard round connection, is advantageous. In the case of special solutions such as downdraft ventilation systems that blow air into the base of the kitchen, a Naber adapter with a 90° deflection can be integrated into the fan housing, especially the second housing section. Furthermore, it is advantageous to position electronic circuit boards in the upper area of ​​the fan in a space-saving manner. Reference symbol list

[0040] 1 Blower housing 10 Housing body (housing area) 100 Reception chamber 101 Air inlet opening 11 Outlet nozzle (outlet area) 110 Air outlet opening 12 Nose 13 Housing part 130 Passage opening 14 Housing part 140 Passage opening 15 Electronics box 16 Edge Separating plane A Central axis

Claims

1. Fume extractor having at least one fan, wherein the fan has a fan housing (1), wherein the fan housing (1) has a housing body (10) and an outlet element (11), wherein the housing body (10) is used to receive a fan wheel, the outlet element (11) extends outwards over the outer periphery of the housing body (10) and the air outlet opening (110) of the fan housing (1) is provided at the end of the outlet element (11) which is facing away from the housing body (10), characterised in that the fan housing (1) consists of a first housing part (13) and a second housing part (14), wherein the parting plane (T) between the two housing parts (13, 14) is parallel to a plane in which the central axis (A) of the housing body (10) lies, and the transition between the housing body (10) and the outlet element (11) at one end in the peripheral direction forms a lug (12) and the parting plane (T) lies between the lug (12) and the central axis (A) of the housing body (10) so that the second housing part (14) contains the entire outlet element (11).

2. Fume extractor according to claim 1, wherein the outlet element (11) forms one of the housing parts (13, 14).

3. Fume extractor according to one of claims 1 or 2, wherein the housing parts (13, 14) are connected to one another in a detachable manner.

4. Fume extractor according to one of claims 1 to 3, wherein the cross-section of the air outlet opening (110) is round or square.

5. Fume extractor according to one of claims 1 to 4, wherein the second housing part (14), in which the air outlet opening (110) is provided, consists at least in part of an acoustically damping material.

6. Fume extractor according to one of claims 1 to 5, wherein the second housing part (14), in which the air outlet opening (110) is provided, consists at least in part of an acoustically permeable material.

7. Fume extractor according to one of claims 1 to 6, wherein the outlet element (110) has a chamfer.

8. Fume extractor according to one of claims 1 to 7, wherein an electronic housing (15) is provided on the second housing part (14), on which the air outlet opening (110) is provided.

9. Fume extractor according to claim 8, wherein fastening means for fastening the fan housing (1) to the fume extractor are provided on the electronic housing (15).