EP4298970A1 - Buse d'aspirateur - Google Patents

Buse d'aspirateur Download PDF

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Publication number
EP4298970A1
EP4298970A1 EP22182644.9A EP22182644A EP4298970A1 EP 4298970 A1 EP4298970 A1 EP 4298970A1 EP 22182644 A EP22182644 A EP 22182644A EP 4298970 A1 EP4298970 A1 EP 4298970A1
Authority
EP
European Patent Office
Prior art keywords
vacuum cleaner
cleaner nozzle
transmission space
housing
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22182644.9A
Other languages
German (de)
English (en)
Inventor
Martin Zydek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wessel Werk GmbH
Original Assignee
Wessel Werk GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wessel Werk GmbH filed Critical Wessel Werk GmbH
Priority to EP22182644.9A priority Critical patent/EP4298970A1/fr
Publication of EP4298970A1 publication Critical patent/EP4298970A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0405—Driving means for the brushes or agitators
    • A47L9/0411—Driving means for the brushes or agitators driven by electric motor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0427—Gearing or transmission means therefor
    • A47L9/0444—Gearing or transmission means therefor for conveying motion by endless flexible members, e.g. belts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466—Rotating tools
    • A47L9/0477—Rolls
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user

Definitions

  • the invention relates to a vacuum cleaner nozzle with a housing, with a suction channel formed in the housing and with a suction mouth formed in an underside of the housing, extending in a transverse direction and adjoining the suction channel.
  • a cleaning element is arranged in the suction channel so that it can rotate about an axis of rotation.
  • a transmission space is arranged in the transverse direction next to the suction channel.
  • the vacuum cleaner nozzle further comprises an electric drive which is at least partially arranged in the transmission space and has an electric motor, which is mechanically coupled to the cleaning element in the transmission space.
  • the generic vacuum cleaner nozzle is intended in particular for cleaning floor surfaces.
  • the electric drive coupled to the cleaning element serves to move it in a rotational movement about the axis of rotation. As a result of this movement, the cleaning element can loosen dirt particles that have accumulated on or in a particularly textile floor covering, so that they can be removed by a suction air flow.
  • the suction channel is intended in particular to be connected to a suction air duct of a suction cleaning device or to be connected to the suction air duct.
  • the vacuum cleaner nozzle preferably has a suction connection, in particular a suction connection piece.
  • the suction cleaning device has a fan for generating a suction air stream and at least one separating device for separating dirt particles carried in the suction air stream.
  • the separation device can in particular be designed as a cyclone filter and/or filter bag.
  • the vacuum cleaner nozzle according to the invention is suitable for use with a canister cleaner, an upright vacuum cleaner, a hand-held vacuum cleaner, battery-operated vacuum cleaners with a rigid suction tube (stick cleaner) and / or vacuum cleaner systems permanently installed in a building.
  • the suction cleaning devices used or the suction lines connecting them to the vacuum cleaner nozzle preferably have electrical supply lines. Integration into a vacuum robot is also possible.
  • EP 2 064 979 proposed to divert the cooling air to the underside of the vacuum cleaner nozzle so that it can be sucked in through the suction mouth.
  • the cooling air flow is therefore still accessible to the cleaning effect.
  • the cooling air in order to generate sufficient negative pressure on the underside of the nozzle, the cooling air must be released in an area that is at least partially sealed from the environment.
  • the invention is based on the object of optimizing the cooling air flow in a generic vacuum cleaner nozzle.
  • a safe supply of cooling air should be guaranteed and the cleaning effect should not be impaired.
  • the electric motor has a cooling air outlet which is fluidly connected to the transmission space. Since the rotating cleaning element in the transmission space is coupled to the electric drive, this could only be sealed from the suction space with a disproportionate amount of effort for vacuum cleaner nozzles. Rather, the transmission space and the suction channel are also fluidly connected to one another in the area of the cleaning element. This makes it possible for the negative pressure prevailing in the suction channel during operation to generate a pressure drop to the transmission space and thereby indirectly to the cooling air outlet of the electric motor.
  • a heated cooling air flow emerging from the cooling air outlet during operation can be diverted into the transmission space and thereby subsequently into the suction channel. Since the transmission space cannot be completely sealed off from the suction channel anyway, no additional incorrect air flows are created. Rather, this air flow is directed by the fluidic connection of the air outlet to the transmission space in such a way that it can also carry waste heat away from the electric motor as a further benefit.
  • the cooling air flow enters the suction channel, it can also have a cleaning effect there by carrying away dirt particles whirled up by the cleaning element.
  • the cleaning performance is therefore also not affected by the measures according to the invention.
  • a further advantage of the invention is that the cooling air flow is not obstructed in the event of suction. On the contrary, the negative pressure within the suction channel increases, so that a larger cooling air flow is formed, which enables improved heat removal from the additionally loaded electric motor.
  • the electric drive has a drive wheel arranged in the transmission space.
  • the drive wheel can be set in rotation by the electric motor. At the same time, it is designed to transmit this rotational movement to the cleaning element through mechanical coupling.
  • the electric motor is arranged outside the transmission space.
  • the drive wheel arranged in the transmission space is connected to the electric motor by a drive shaft, which runs through a conversion of the transmission space.
  • the electric motor is encapsulated from the transmission space - and also from the suction channel. Any dirt particles present in the transmission space or emerging from the suction channel into the transmission space are thus better kept away from the electric motor.
  • the electric motor is expediently at a higher pressure level than the transmission space during operation, complete sealing (for example by a shaft seal) is not necessary. Rather, the space between the electric drive and the wall is flushed by an air flow during operation.
  • annular gap of less than 0.3 mm, preferably between 0.05 mm and 0.1 mm, is formed between the wall of the transmission space and the electric drive.
  • annular gap of this size can reliably prevent mechanical contact between moving parts of the electric drive and the wall, while no excessively large secondary air flows are to be expected.
  • the annular gap preferably has a flow cross section of less than 10 mm 2 , in particular less than 4 mm 2 , most preferably 2 mm 2 or less.
  • the annular gap is limited on the one hand by the wall and, on the other hand, in particular by the motor housing, a non-rotating part of the electric motor, the motor shaft and/or the drive wheel.
  • the electric drive is sealingly inserted into the wall of the transmission space, so that no annular gap remains.
  • the electric motor preferably has a motor housing, the cooling air outlet of the electric drive being formed on the motor housing and the motor housing further having at least one cooling air inlet.
  • the cooling air outlet is connected to the transmission space through an exhaust air line.
  • the exhaust air line directs the cooling air flow in such a way that the heated cooling air emerging from the motor housing during operation is directly removed via the exhaust air line and fed to the transmission space. This allows the cooling performance achieved with a given cooling air flow to be maximized.
  • the electric motor has an impeller within the motor housing for conveying the cooling air. This actively promotes the cooling air flow from the cooling air inlet towards the cooling air outlet.
  • the exhaust air line particularly preferably has a line cross section between 20 mm 2 and 100 mm 2 .
  • An exhaust air duct dimensioned in this way is suitable for absorbing all cooling air flowing from the cooling air outlet and forwarding it to the transmission space with little flow resistance
  • the exhaust air line is designed as a pipeline.
  • a pipeline in particular has cross-sectional areas that are at least geometrically similar to one another.
  • the pipeline is designed with a constant flow cross section and/or a consistent cross-sectional shape.
  • the pipeline can be designed with a round, oval or polygonal cross section.
  • the exhaust air line can be inserted into the housing as a separate component. This makes the manufacturing process easier.
  • the separately designed exhaust air line can also be made of a different material than the material of the housing. It is also conceivable to design the exhaust air line from a flexible material - for example as a rubber hose.
  • the exhaust air line is integrated into the housing.
  • a flow channel can be formed by two parallel wall sections, which simultaneously functions as an exhaust air line.
  • the exhaust air line is particularly preferably connected to the motor housing in a sealing manner. This contributes to additional control of the cooling air flow, as the pressure level in the transmission space - mediated by the exhaust air line - is specifically concentrated at the cooling air outlet. Air extracted via the exhaust air line is forced through the motor housing.
  • the exhaust air line particularly preferably opens into a wall of the transmission space. From there it connects directly to the pressure level of the transmission space.
  • the cleaning element preferably has a cleaning roller filled with cleaning agents, in particular bristles, and a drive element which can be detachably connected to the cleaning roller and which is coupled to the electric drive.
  • cleaning agents in particular bristles
  • a drive element which can be detachably connected to the cleaning roller and which is coupled to the electric drive.
  • the cleaning roller and the drive element are expediently connected to one another in a form-fitting manner by a driver profile.
  • one of the two connection partners has a projection which engages in a form-fitting manner in an assigned receptacle of the other connection partner.
  • this projection can additionally have rib extensions which engage in assigned receiving slots of the receptacle.
  • the rib extensions (and correspondingly the receiving slots) can be helically coiled.
  • the coil is inclined in such a way that the axial moment pulls the cleaning roller in the direction of the drive element during operation.
  • the drive element is mounted on the housing in a stationary manner and rotatable about the drive axis of rotation. This facilitates the mechanical coupling with the electric drive, as the drive element does not have to be repositioned.
  • the cleaning roller is expediently designed to be removable from the housing. Since dirt particles and fibers or hair can repeatedly accumulate on the cleaning element during operation, it is advantageous to remove it every now and then for cleaning purposes.
  • the division of the cleaning element into two parts is a further advantage since only the cleaning roller needs to be removed.
  • the electric drive and the cleaning element are coupled to one another by a gear.
  • Any drive wheel is designed in particular as a gear, which - if necessary with the interposition of one or more additional gears - couples to the cleaning element.
  • a drive element can be connected to a gear or partially gear-shaped.
  • the electric drive and the cleaning element are coupled to one another by an endlessly rotating drive means, in particular a toothed belt.
  • an endlessly rotating drive means in particular a toothed belt.
  • an elastically designed rotating drive means also serve as a mechanical buffer between the electric drive and the cleaning element.
  • the transmission space is preferably separated from the suction channel by a partition.
  • the partition has an opening formed with a border through which the cleaning element protrudes.
  • An annular channel is formed between the edge and the cleaning element, in particular the cleaning roller.
  • this annular channel can serve as a fluidic connection between the transmission space and the suction channel. As a result, the cooling air flow can be transferred from the transmission space into the suction channel and discharged there.
  • the annular channel has a size (measured radially, i.e. perpendicular to the axis of rotation) between 0.5 mm and 2 mm, in particular between 0.5 mm and 1 mm.
  • the ring channel is particularly preferably designed with a width of approximately 0.7 mm. With this size, a sufficient cooling air flow can be generated. At the same time, the transfer of dirt particles from the suction channel into the transmission space is sufficiently prevented.
  • the annular channel particularly preferably has a cross-sectional area between 20 mm 2 and 100 mm 2 .
  • the cross-sectional area of the annular channel is in a ratio of between 1:2 and 2:1 to the flow cross-section of the connection of the cooling air outlet with the transmission space - in particular the exhaust air line.
  • the two flow cross sections are approximately the same size.
  • the electric motor is preferably arranged at least partially, in particular with a possible motor housing, preferably completely in a motor chamber formed in the housing.
  • the motor chamber serves to structurally separate and encapsulate the electric motor. This allows it to be protected mechanically and from contamination. It also serves to direct the flow of cooling air.
  • the motor chamber particularly preferably has at least one supply air opening.
  • This is a defined air opening which connects the motor chamber with a higher pressure level during operation, in particular the outside of the vacuum cleaner nozzle.
  • the supply air opening preferably has a flow cross section of at least 50 mm 2 , in particular at least 70 mm 2 , very particularly preferably at least 100 mm 2 . It is advantageously provided that the supply air opening has a larger flow cross section than the fluidic connection of the cooling air outlet to the transmission space.
  • the supply air opening is arranged in an area of the motor chamber which - in relation to the electric motor - is opposite the cooling air inlet.
  • the cooling supply air first passes past an outside of the motor housing before passing through the cooling air inlet gets inside. It is then further heated there and specifically removed via the cooling air outlet within the scope of the invention.
  • the Fig. 1 shows a vacuum cleaner nozzle 1 according to the invention with a partially broken housing 2.
  • the housing 2 extends in a working direction x, a transverse direction y and in a vertical direction z which is perpendicular to the working direction x and the transverse direction y.
  • the vacuum cleaner nozzle 1 is a so-called double-joint nozzle with an intermediate piece 3 which can be pivoted about a pivot axis running in the transverse direction on the housing 2 and a suction connection piece 4 which is also designed to be pivotable with respect to the working direction x at the rear end of the intermediate piece 3.
  • the intermediate piece 3 carries two rear rollers 5, whose axis of rotation 5a is aligned with a second pivot axis, about which the suction connection piece 4 is articulated on the intermediate piece.
  • a suction channel 6 can be seen inside, which extends essentially in the transverse direction y and is fluidly connected to the suction connection piece 4 via a suction line 7.
  • a comparative view with the bottom view Fig. 2 one can see that on the underside of the housing 2 - based on the vertical direction z - a suction mouth 8 is formed, which is delimited by a front suction mouth edge 8a with respect to the working direction x and a rear suction mouth edge 8b and also connects to the suction channel 6 arranged above it.
  • a cleaning element 9 is rotatably arranged about an axis of rotation d running in the transverse direction y.
  • the cleaning element 9 includes a cleaning roller 10, which is filled with cleaning agents in the form of bristle tufts 10a and cleaning lips 10b.
  • the cleaning roller 10 is designed to be removable from the housing 2.
  • the cleaning element 9 additionally has a drive element 11 which can be connected to the cleaning roller 10 and which is mounted in the housing 2 in a stationary and rotatable manner about the axis of rotation d.
  • the drive element 11 has a drive mandrel, not shown, which projects into an associated receptacle of the cleaning roller 10.
  • the vacuum cleaner nozzle 1 additionally has an electric drive 12 with an electric motor 13.
  • a transmission space 14 is also formed, in which the electric drive 12 is mechanically coupled to the cleaning element 9.
  • the electric motor 13 is formed with a motor housing 13a, which has a cooling air outlet 13b.
  • the cooling air outlet 13b is fluidly connected to the transmission space 14. In the exemplary embodiment shown, this is effected by an exhaust air line 15.
  • This is sealingly connected to the motor housing 13a and opens into a wall 14a of the transmission space 14.
  • the housing 13a of the electric motor 13 is arranged completely within a motor chamber 17 formed in the housing 2.
  • the electric drive 12 includes a drive wheel 12a arranged in the transmission space 14. This is connected to the electric motor 13 by a motor shaft 13c, which extends through the wall 14a of the transmission space.
  • An annular gap s 1 of less than 1 mm remains between the wall 14a of the transmission space 14 and the drive shaft 13c.
  • the wall 14a of the transmission space 14 further forms a partition 16 to the suction channel 6.
  • the partition 16 has an opening 16b formed with an edge 16a, through which the cleaning element 9 projects.
  • the outermost edge of the cleaning element 9 is formed by the roller body of the cleaning roller 10 in the area of the opening 16b.
  • annular channel s 2 between 0.5 mm and 2 mm, which fluidly connects the transmission space 14 to the suction channel 6.
  • the electric drive 12 is connected via its drive wheel 12a, which can be rotated about a drive axis a, to the drive element 11 of the cleaning roller 9 by an endlessly rotating drive means in the form of a toothed belt 18.
  • part of the drive element 11 is designed as a drive pinion 11a over which the toothed belt 18 runs.
  • the drive axis a and the rotation axis d are aligned parallel to one another in the transverse direction y and with respect to the working direction x arranged one behind the other.
  • the drive axle a is arranged at at least the same height with respect to the vertical direction z.
  • the air flow is in the Fig. 3 indicated by arrows.
  • the motor chamber 17 has a supply air opening 17a, which connects it to the outside of the housing 2.
  • the supply air opening 17a opens into an intermediate gap between the housing 2 and the intermediate piece 3. At this point it is, on the one hand, concealed and, on the other hand, protected from ingress of dirt and accidental concealment.
  • the electric motor 13 has a cooling air inlet 13d. This is arranged on the side of the motor housing 13a facing away from the supply air opening 17a. As a result, a cooling air flow that has entered through the supply air opening 17a first passes the outside of the motor housing 13a before entering the interior of the motor housing 13a through the cooling air inlet 13d. There it is further heated by the waste heat from the electric motor and exits the motor housing 13a through the cooling air outlet 13b and is transferred into the transmission space 14 through the exhaust air line 15. Due to the pressure drop that prevails during operation, the cooling air flow is finally guided through the annular channel s 2 into the suction channel 6 and is drawn off there together with the suction air flow through the suction line 7 in the direction of the suction connection piece 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
EP22182644.9A 2022-07-01 2022-07-01 Buse d'aspirateur Pending EP4298970A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22182644.9A EP4298970A1 (fr) 2022-07-01 2022-07-01 Buse d'aspirateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22182644.9A EP4298970A1 (fr) 2022-07-01 2022-07-01 Buse d'aspirateur

Publications (1)

Publication Number Publication Date
EP4298970A1 true EP4298970A1 (fr) 2024-01-03

Family

ID=82547369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22182644.9A Pending EP4298970A1 (fr) 2022-07-01 2022-07-01 Buse d'aspirateur

Country Status (1)

Country Link
EP (1) EP4298970A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05253125A (ja) * 1992-03-13 1993-10-05 Matsushita Electric Ind Co Ltd 電気掃除機の床ノズル
JP2002165733A (ja) * 2000-11-30 2002-06-11 Sanyo Electric Co Ltd 床用吸込具
EP2064979A1 (fr) 2007-11-14 2009-06-03 Wessel-Werk Gmbh Tête d'aspiration électrique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05253125A (ja) * 1992-03-13 1993-10-05 Matsushita Electric Ind Co Ltd 電気掃除機の床ノズル
JP2002165733A (ja) * 2000-11-30 2002-06-11 Sanyo Electric Co Ltd 床用吸込具
EP2064979A1 (fr) 2007-11-14 2009-06-03 Wessel-Werk Gmbh Tête d'aspiration électrique

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