DE102018126736A1 - Blower capsule device for reducing noise for a blower, blower system with a blower capsule device, and method for manufacturing a blower system - Google Patents

Abstract

The approach presented here relates to a blower capsule device (115) for reducing noise development for a blower (110). The blower capsule device (115) has at least one deflection element (200). The at least one deflection element (200) can be arranged on or via at least one blower section or a housing section of the blower (110). A wall thickness of a deflection edge (205) of the deflection element (200) is at least partially wider than a wall section of the deflection element (200) adjoining the deflection edge (205).

Description

The approach presented here relates to a blower capsule device for reducing noise development for a blower, a blower system with a blower capsule device and a method for producing a blower system.

Due to ever increasing demands on the acoustics of vacuum cleaners, blower capsules are increasingly being used in order to insulate the noise emitted by the blower as well as possible. The blower capsules are usually made as thin-walled shell components made of plastic. A complete encapsulation of the blower in the blower capsule is not possible since there should always be a free air path to ensure an air volume flow in the vacuum cleaner. Most current blower capsules do not have any special design measures on their edges around which air flows.

The WO 2017/092832 A1 describes a possibility of not shaping the edges of blower capsules straight, but wave-shaped, in order to lengthen the overflowed edge and to minimize air performance losses.

The approach presented here is based on the task of creating an improved blower capsule device for reducing noise development for a blower, a blower system with an improved blower capsule device and a method for producing an improved blower system.

According to the invention, this object is achieved by a blower capsule device for reducing noise development for a blower, furthermore a blower system with a blower capsule device and a method for producing a blower system with the features or steps of the main claims. The subject of the present approach is also a computer program. Advantageous refinements and developments of the approach result from the following subclaims.

The advantages that can be achieved with the approach presented here are that a blower capsule device is created which realizes very low air performance losses and a strong reduction in perceptible acoustics of the blower.

A blower capsule device for reducing noise development for a blower has at least one deflection element. The at least one deflection element can be arranged on or via at least one blower section or a housing section of the blower. A wall thickness of a deflection edge of the deflection element is at least partially wider than a wall section of the deflection element adjacent to the deflection edge.

The blower capsule device can be shaped for use in or on a blower of a household appliance, for example a vacuum cleaner. The blower capsule device can also be shaped for use with a commercial or professional device or any other device with a blower. The blower can be designed to generate an air flow. For this purpose, the blower can have a motor and, additionally or alternatively, a propeller which can be driven by the motor.

The deflecting element can be designed to cause the air flow generated by the fan to be deflected over the deflecting edge of the deflecting element in an installed state on the blower section or housing section of the blower during operation of the blower. The wider or thicker wall thickness of the deflecting edge can advantageously bring about a fluidic improvement in the air flow along the deflecting edge, for example, in the event of an overflow, delays in the vortex at the deflecting edge can be delayed. According to one embodiment, the wall thickness of the complete deflecting edge can also be made wider than the wall section adjoining the deflecting edge.

The deflecting edge can form a rounded edge at least in sections. This creates a particularly streamlined radius at the edge. This allows a flow velocity to be reduced compared to an angular edge. A pressure loss can also advantageously be significantly reduced by a thicker and additionally or alternatively rounded edge. According to one embodiment, the complete deflection edge can also form the rounded edge.

According to one embodiment, the rounded edge forms a curvature that widens in a drop-like manner. Such a design of the deflecting edge enables an edge to be designed in a fluidically ideal manner.

The deflecting element can be shaped in the form of a shell and additionally or alternatively in the form of a ring, in particular wherein the deflecting edge can be shaped on an inner side of the annular deflecting element. For example, the deflecting element can be a semicircular shell or act as an annular shell with a U-shaped cross section, that is to say a semi-toroidal deflecting element.

According to an advantageous embodiment, the blower capsule device has at least one further deflection element, a further wall thickness of a further deflection edge of the further deflection element being at least partially wider than a further wall section of the further deflection element adjoining the further deflection edge. The further deflecting element can be shaped in order to bring about a further deflection of the air flow generated by the fan over the further deflecting edge of the further deflecting element in an assembled state on the blower section or housing section during operation of the blower. For example, the further deflecting element can be tubular or shell-shaped at least in sections.

The further deflection element can have a smaller external dimension than the deflection element. The smaller outside dimension can be, for example, a smaller outside diameter. Additionally or alternatively, an inner dimension, for example an inner diameter, of the deflecting element can be smaller than the outer dimension of the further deflecting element. Thus, the further deflecting edge can be arranged so as to protrude into the U of the annular or shell-shaped deflecting element in order to form a tortuous air duct for the air flow.

It is also advantageous if the blower capsule device has a base element from which a pin extends. The base element can be designed so as to be able to be coupled to the further deflecting element or can be coupled to it, for example in one piece. The base element can, for example, form a base for a further deflecting element configured in the form of a tube, for example in order to close a side of the further deflecting element configured in the form of a tube opposite the further deflecting edge. The pin can be rounded and can additionally or alternatively extend centrally from the base element. The pin can extend parallel to an extension direction of the further deflecting edge towards the further deflecting edge. A turn of the air duct can thus be generated. The air can thus flow out of the center of the blower capsule device along the pin.

The blower capsule device can have a shell-shaped housing element which has a larger outer dimension, for example a larger outer diameter or a larger clear width or width, than the deflection element. The housing element can form an outermost shell of the blower capsule device, for example if, according to one embodiment, the deflecting element and the further deflecting element are also shaped like a shell and, for example, are arranged opposite one another and additionally or alternatively are at least partially projecting into one another. The housing element can at least partially include the deflecting element and the further deflecting element and form an air outlet for the air flow to one side.

A blower system has a blower and a blower capsule device, which is formed in one of the variants described above. In such a blower system, noise generated by the blower is greatly reduced during operation of the blower thanks to the blower capsule device.

A household appliance, in particular a vacuum cleaner, has such a blower system. Such a household appliance can serve as a replacement for known household appliances, the household appliance presented advantageously being particularly quietly perceptible in operation.

• Bereitstellen eines Gebläses und einer Gebläsekapselvorrichtung mit zumindest einem Umlenkelement, wobei eine Wandstärke eines Umlenkrands des Umlenkelements zumindest abschnittsweise breiter ausgeformt ist, als ein an den Umlenkrand angrenzender Wandabschnitt des Umlenkelements; und
• Anordnen des zumindest einen Umlenkelements an oder über zumindest einen Gebläseabschnitt oder einen Gehäuseabschnitt des Gebläses, um das Gebläsesystem herzustellen.

A method of making a blower system includes the following steps:

• Providing a blower and a blower capsule device with at least one deflecting element, wherein a wall thickness of a deflecting edge of the deflecting element is at least partially wider than a wall section of the deflecting element adjoining the deflecting edge; and
• Arranging the at least one deflection element on or above at least one blower section or a housing section of the blower in order to produce the blower system.

This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control unit.

The approach presented here also creates a device which is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices. With this embodiment variant of the approach in the form of a device, the task underlying the approach can be solved quickly and efficiently.

A computer program product or computer program with program code, which is stored on a machine-readable carrier or storage medium such as a semiconductor memory, is also advantageous. a hard disk memory or an optical memory can be stored. If the program product or program is executed on a computer or a device, the program product or program can be used to carry out, implement and / or control the steps of the method according to one of the embodiments described above.

• 1 eine schematische seitliche Darstellung eines Staubsaugers mit einem Gebläsesystem mit einem Gebläse und einer Gebläsekapselvorrichtung zum Reduzieren einer Geräuschentwicklung des Gebläses gemäß einem Ausführungsbeispiel;
• 2 eine seitliche Querschnittdarstellung einer Gebläsekapselvorrichtung gemäß einem Ausführungsbeispiel;
• 3 eine schematische Ansicht eines Details eines Umlenkrands einer Gebläsekapselvorrichtung gemäß einem Ausführungsbeispiel;
• 4 eine Querschnittdarstellung einer Gebläsekapselvorrichtung gemäß einem Ausführungsbeispiel;
• 5 eine schematische Ansicht eines weiteren Details eines weiteren Umlenkrands einer Gebläsekapselvorrichtung gemäß einem Ausführungsbeispiel; und
• 6 ein Ablaufdiagramm eines Verfahrens zum Herstellen eines Gebläsesystems gemäß einem Ausführungsbeispiel.

Exemplary embodiments of the approach are shown purely schematically in the drawings and are described in more detail below. It shows

• 1 is a schematic side view of a vacuum cleaner with a blower system with a blower and a blower capsule device to reduce noise from the blower according to an embodiment;
• 2nd a side cross-sectional view of a blower capsule device according to an embodiment;
• 3rd a schematic view of a detail of a deflection edge of a blower capsule device according to an embodiment;
• 4th a cross-sectional view of a blower capsule device according to an embodiment;
• 5 a schematic view of a further detail of a further deflection edge of a blower capsule device according to an embodiment; and
• 6 a flowchart of a method for manufacturing a blower system according to an embodiment.

In the following description of favorable exemplary embodiments of the present approach, the same or similar reference numerals are used for the elements shown in the different figures and acting in a similar manner, a repeated description of these elements being omitted.

If an exemplary embodiment comprises an “and / or” link between a first feature and a second feature, this is to be read in such a way that the embodiment according to one embodiment has both the first feature and the second feature and according to a further embodiment either only that has the first feature or only the second feature.

1 shows a schematic side view of a vacuum cleaner 100 with a blower system 105 with a blower 110 and a blower capsule device 115 to reduce fan noise 110 according to an embodiment.

The blower system is only an example 105 according to this embodiment on or in the vacuum cleaner 100 arranged. According to an alternative embodiment, the blower system 105 arranged on or in another household appliance.

The blower capsule device 115 is shaped and / or arranged to prevent noise from the fan 110 to reduce. This is the blower capsule device 115 in accordance with this exemplary embodiment on or above at least one blower section or a housing section of the blower 110 arranged. A more detailed view and description of the blower capsule device 115 follow from 2nd .

2nd shows a side cross-sectional view of a blower capsule device 115 according to an embodiment. It can be based on the 1 Blower capsule device described 115 act. As in 1 is described, the blower capsule device 115 according to this embodiment on or above the blower 110 arranged.

The blower capsule device 115 has at least one deflecting element 200 on, which is designed to reduce the noise of the fan 110 to reduce and the flow losses of the blower capsule device 115 to reduce.

The deflecting element 200 according to this embodiment is on or above at least the blower section or the housing section of the blower 110 arranged, wherein a wall thickness of a deflecting edge 205 of the deflecting element 200 is at least partially wider than one on the deflecting edge 205 adjacent wall section of the deflecting element 200 .

In the operation of the blower 110 is according to this embodiment in the assembled state of the blower capsule device shown here 115 on the blower 110 an air flow from a fan outlet 207 through an air duct of the blower capsule device 115 to an air leak 209 from the blower capsule device 115 headed.

According to this exemplary embodiment, the wall thickness of the complete deflection edge is 205 wider than that at the deflection edge 205 adjacent wall section. According to this exemplary embodiment, the deflecting edge forms 205 a rounded edge at least in sections or all around. Here, the rounded edge forms a teardrop shape according to this embodiment widening curvature. The deflecting element 200 According to this embodiment, it is shaped like a bowl and a ring, with the deflecting edge 205 according to this embodiment on an inside of the annular deflecting element 200 is formed. With the deflection element 200 According to this exemplary embodiment, it is an annular shell with a U-shaped cross section, that is to say a half-toroidal deflecting element 200 .

The blower capsule device 115 has at least one further deflection element according to this exemplary embodiment 210 on, with a further wall thickness of a further deflecting edge 215 further deflecting element 210 is at least sectionally wider than one on the further deflecting edge 215 Adjacent further wall section of the further deflecting element 210 . The further deflecting element 210 is tubular at least in sections according to this embodiment.

The further deflecting element 210 according to this exemplary embodiment has a smaller outer dimension than the deflection element 200 . According to this exemplary embodiment, the further deflection element projects 210 in the U-shaped cross section of the bowl-shaped deflecting element 200 inside. Here is the further deflecting edge 215 a shell bottom of the shell-shaped deflection element 200 arranged facing. The deflecting element 200 and the further deflecting element 210 According to this exemplary embodiment, the air duct can be wound from two outer sides to a center of the blower capsule device 115 there.

In addition, the blower capsule device 115 according to this embodiment, a floor element 220 on, from which a cone 225 extends. According to this embodiment, the floor element 220 with the further deflecting element 210 coupled. According to an alternative embodiment, the floor element 220 with the further deflecting element 210 coupled in one piece. The floor element 220 forms a further deflecting edge according to this embodiment 215 opposite bottom for the tubular deflection element 210 out. The cone 225 is rounded according to this embodiment and / or extends centrally from the bottom element 220 . The cone 220 extends parallel to an extension direction of the further deflection edge according to this embodiment 215 to the further deflecting edge 215 there. The cone 220 generates a turn of the air duct according to this embodiment. On the spigot 220 along or around the tenon 225 According to this exemplary embodiment, the air flow can center out of the blower capsule device 115 flow out.

An enlarged view of a detail B of the deflecting edge 205 is in 2nd shown.

• Die hier vorgestellte Gebläsekapselvorrichtung 115 kann auch als eine Gebläse-Kapsel mit Kantenaufdickung bezeichnet werden. Die Gebläsekapselvorrichtung 115 realisiert eine Aufdickung von umströmten Kanten an Staubsauger-Gebläsekapseln. Gemäß diesem Ausführungsbeispiel sind alle umströmten Kanten der Gebläsekapselvorrichtung 115 aufgedickt.

Exemplary embodiments are described below with the aid of 1 described again in other words:

• The blower capsule device presented here 115 can also be called a blower capsule with thickened edges. The blower capsule device 115 implements thickened edges around vacuum cleaner blower capsules. According to this exemplary embodiment, all edges around which the fan capsule device flows are 115 thickened.

The blower capsule device 115 is designed with multiple layers according to this exemplary embodiment, or according to an alternative exemplary embodiment only with single layers. The blower capsule device 115 is designed so that there is a clear airway from the fan outlet 207 of the blower 205 up to the air outlet 209 an engine compartment is as long as possible and the largest possible proportion of the sound energy is dissipated over the length of the path and partially built-up absorption material. Due to the mostly small installation space in a vacuum cleaner engine compartment, the air path is extended by targeted air deflections. At these air deflections, the outer edges of the blower capsule are forced to flow around. Due to air turbulence and increased air velocities, there is a loss of air performance and also noise, which negatively compensate for part of a benefit or advantage of a blower capsule. A thin-walled design of the blower capsule device 115 with a wall thickness of less than 5 millimeters according to an exemplary embodiment alone, however, it is not possible to realize a large and therefore flow-conforming radius at the edge. The blower capsule device presented here therefore has 115 advantageously at least one deflecting edge 220 with a wider wall thickness of according to an embodiment 5 Millimeters or more.

Thus, a flow-conforming radius or, in other words, a flow-conforming rounding on the outer edges of the thin-walled blower capsule device 115 realized so that vortex detachment at the edges of the deflection edges 205 , 215 be delayed and the existing flow cross-section is better utilized. In the operation of the blower 110 the air flow is thus better distributed over the open cross-section and a maximum flow speed is reduced. This in turn leads to improved air performance and less noise at the deflection edges 205 , 215 .

By thickening the outer edges of the deflection edges 205 , 215 the blower capsule device 115 is a better flow design of the edges. In accordance with this exemplary embodiment, curves and large radii are designed, as a result of which eddies are minimized and eddy detachments are delayed at the edges, so that available flow cross sections are better utilized. This leads to reduced flow losses and to reduced flow speeds and thus also to improved acoustics. A basic experiment from a flow simulation shows that thickened edges with a rounding significantly reduce a flow speed. A loss of pressure due to the obstacle could also be significantly reduced by the thickened rounded edge.

The blower capsule device presented here 115 can be produced or manufactured using a plastic injection molding process. The thickened edges with the flow-appropriate design are advantageously directly in the construction of the blower capsule device 115 been taken into account. Additional components are not necessary.

Advantages of the blower capsule device presented here 115 are summarized lower air performance losses and an improved acoustic effect of the blower capsule device 115 .

3rd shows a schematic view of a detail B of a deflecting edge 205 a blower capsule device according to an embodiment. This is an enlarged view of the in 2nd described rounded deflection edge 205 .

4th shows a cross-sectional view of a blower capsule device 115 according to an embodiment. It can be the in 2nd Blower capsule device described 115 act, which is shown rotated by 90 degrees, with the difference that the deflecting element 200 and the further deflecting element 210 according to this exemplary embodiment, both are shaped in a shell. With the deflection element 200 and the further deflecting element 210 According to this exemplary embodiment, semicircular shells with different diameters are involved. The deflecting element 200 and the further deflecting element 210 are arranged opposite each other and / or at least partially projecting into each other according to this embodiment. According to this exemplary embodiment, the circumferential further circumferential edge projects 215 further deflecting element 210 into a cavity in the deflecting element 200 .

The blower capsule device 115 according to this embodiment has no bottom element, but a shell-shaped housing element 400 on, which has a larger outer dimension than the deflecting element 200 .

The housing element 400 includes the deflecting element 200 according to this embodiment at least partially and the further deflection element according to this embodiment 210 Completely. According to this exemplary embodiment, the circumferential peripheral edge of the deflecting element projects 200 into a cavity in the housing element 400 . In the assembled state of the blower capsule device 115 According to this embodiment, the air flow becomes from a center of the blower capsule device 115 through the blower capsule device 115 directed outside. The housing element 400 generates the air outlet for the air flow to one side of the blower capsule device according to this exemplary embodiment 115 there.

An enlarged view of a further detail E of the further deflecting edge 215 is in 5 shown.

5 shows a schematic view of a further detail E of a further deflection edge 215 a blower capsule device 115 according to an embodiment. This is an enlarged view of the in 4th described rounded further deflecting edge 215 .

6 shows a flow chart of a method 600 for producing a blower system according to an embodiment. It can be in 1 Blower system described with one of the in 2nd or 4th described blower capsule devices act.

The procedure 600 has at least one step 605 of deploying and one step 610 of arranging. In step 605 of the provision, a blower and a blower capsule device are provided with at least one deflecting element, wherein a wall thickness of a deflecting edge of the deflecting element is at least partially wider than a wall section of the deflecting element adjoining the deflecting edge. In step 610 of the arrangement, the at least one deflection element is arranged on or above at least one blower section or a housing section of the blower in order to produce the blower system.

The method steps presented here can be repeated and carried out in a different order than that described.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2017/092832 A1 [0003]

Claims (14)

A blower capsule device (115) for reducing noise for a blower (110), the blower capsule device (115) having the following features: - At least one deflection element (200) which can be arranged on or via at least one blower section or a housing section of the blower (110), wherein a wall thickness of a deflection edge (205) of the deflection element (200) is at least partially wider than one on the deflection edge (205) Adjacent wall section of the deflecting element (200). Blower capsule device (115) according to Claim 1 , in which the deflecting edge (205) forms a rounded edge at least in sections. Blower capsule device (115) according to Claim 2 , in which the rounded edge forms a drop-widening curvature. Blower capsule device (115) according to one of the preceding claims, in which the deflecting element (200) is shaped in the form of a shell and / or in a ring, in particular in which the deflecting edge (205) is formed on an inside of the annular deflecting element (200). Blower capsule device (115) according to one of the preceding claims, with at least one further deflecting element (210), wherein a further wall thickness of a further deflecting edge (215) of the further deflecting element (210) is at least partially wider than one on the further deflecting edge (215) Adjacent further wall section of the further deflecting element (210). Blower capsule device (115) according to Claim 5 , in which the further deflection element (210) is tubular or shell-shaped at least in sections. Blower capsule device (115) according to one of the Claims 5 to 6 , in which the further deflecting element (210) has a smaller external dimension than the deflecting element (200). Blower capsule device (115) according to one of the Claims 6 to 7 , With a base element (220) from which a pin (225) extends. Blower capsule device (115) according to one of the Claims 1 to 7 , with a shell-shaped housing element (400) which has a larger outer dimension than the deflection element (200). Blower system (105) with a blower (110) and a blower capsule device (115) according to one of the preceding claims. Household appliance, in particular vacuum cleaner (100), with a blower system (105) according to Claim 10 . A method (600) for manufacturing a blower system (105), the method (600) comprising the following steps: - Providing (605) a blower (110) and a blower capsule device (115) with at least one deflecting element (200), the wall thickness of a deflecting edge (205) of the deflecting element (200) being at least partially wider than one on the deflecting edge (205 ) adjacent wall section of the deflecting element (200); and - Arranging (610) the at least one deflection element (200) on or above at least one blower section or a housing section of the blower (110) in order to produce the blower system (105). Device configured to perform the steps of the method (600) Claim 12 to be controlled and / or executed in appropriate units. Computer program product with program code for performing the method (600) according to Claim 12 when the computer program product is running on a device.

Images