Suction head equipped with rotary brush provided with cleaning sheet

Abstract

The invention provides a suction head (2), the suction head (2) comprising a body (4); a rotary brush (11) housed in the main body (4) and including a brush body (12) configured to be driven to rotate in a predetermined orientation and about a rotation axis, a bristle row (14) provided on an outer peripheral surface of the brush body (12), and a cleaning sheet (15) provided on the outer peripheral surface of the brush body (12), the cleaning sheet (15) is angularly offset from the bristle row (14) at an offset angle with respect to a central longitudinal axis (A) of the brush body (12), and a predetermined rotational orientation with respect to the brush body (12) lies behind the bristle row (14).

Description

Technical Field

[0001] The present invention relates to the field of vacuum cleaners equipped with a suction head allowing the suction of dust and debris present on the surface to be cleaned. Background Art

[0002] Vacuum cleaners equipped with a suction head are well known on the market, which allow cleaning a surface by suctioning out dust and debris settled on the surface. The surface to be vacuumed may be, for example, a tile, a parquet, a laminate, a carpet or a floor mat.

[0003] A suction head comprises in a known manner a body including a sole plate, the lower surface of which is designed to be positioned in the vicinity of a surface to be vacuumed during use of the suction head, and a suction opening opening in the lower surface of the sole plate.

[0004] In order to improve the cleaning performance of a suction head, it is known to equip the suction head with:

[0005] - a rotating brush comprising a brush body accommodated in a suction chamber defined by a main body of the suction head and rotatably movable about a rotation axis, a bristle row arranged on the outer peripheral surface of the brush body, and a protective sheet arranged on the outer peripheral surface of the brush body and located behind the bristle row, and

[0006] - means for driving rotation, which are configured to drive the brush body in rotation about the axis of rotation.

[0007] The main function of the bristle row is to scrape the floor to be cleaned, especially when the floor to be cleaned is a soft floor such as a carpet or a mat, while the function of the protective sheet is to limit hair or similar garbage from being entangled around the brush body.

[0008] When the bristles of the bristle row scrape the carpet, the dust particles contained in the carpet are ejected toward the suction port by the bristles of the bristle row and are sucked by the vacuum cleaner. After the scraping action performed by the bristle row, the carpet fibers deformed by the bristle row return to their initial position and eject the dust particles, which are then suspended in the air.

[0009] Depending on the brush diameter of the rotating brush and the rotational speed of the rotating brush, the tangential speed at the free ends of the bristles and the free ends of the cleaning sheets can be higher or lower.

[0010] As a result, depending on the deviation angle between the bristle row and the protective sheet and the tangential speed at the free end of the cleaning sheet, dust particles ejected by the carpet fibers after the scraping action may fall back to the ground due to gravity before being driven towards the suction opening by the protective sheet, or may be ejected into the air after passing the cleaning sheet and therefore fall behind the protective sheet.

[0011] As a result, the cleaning performance of vacuum cleaners of the above-mentioned type has proven to be insufficient. Summary of the invention

[0012] The present invention aims to remedy all or part of these disadvantages.

[0013] The technical problem underlying the present invention is, inter alia, to provide a suction head which is structurally simple but which nevertheless offers enhanced cleaning performance.

[0014] To this end, the present invention relates to a suction head, comprising:

[0015] a body comprising a lower surface configured to be oriented facing the surface to be cleaned, and a suction opening opening in the lower surface of the body, the body defining a suction chamber fluidly connected to the suction opening,

[0016] - a rotating brush housed in the suction chamber, the rotating brush comprising:

[0017] o a brush body having a central longitudinal axis and configured to be driven to rotate along a predetermined rotational direction and about a rotation axis substantially coaxial with the central longitudinal axis of the brush body,

[0018] o rows of bristles disposed on the outer peripheral surface of the brush body and extending over at least a portion of the length of the brush body, and

[0019] o a cleaning flake disposed on the outer peripheral surface of the brush body and extending over at least a portion of the length of the brush body, the cleaning flake being angularly offset from the bristle row at an offset angle relative to a central longitudinal axis of the brush body and being located behind the bristle row relative to a predetermined rotational orientation of the brush body, and

[0020] - means for driving rotation, which are configured to drive the brush body in rotation about the axis of rotation.

[0021] The brush diameter of the rotating brush is between 0.03 and 0.08 m, for example between 0.03 and 0.065 m, the means for driving the rotation are configured to drive the brush body to rotate at a predetermined rotation speed of between 2000 and 8000 rpm, advantageously between 3000 and 5000 rpm, for example equal to about 4100 rpm, and the deviation angle expressed in degrees is equal to the deviation angle expressed in ms at the free ends of the bristles of the bristle row when the brush body is driven to rotate at the predetermined rotation speed. -1 The ratio of the tangential velocities indicated is between 2.5 and 3.5.

[0022] In this document, "brush diameter" means the outer diameter of the rotating brush measured at the free ends of the bristles. In other words, the brush diameter corresponds to the diameter of a circle centered on the central longitudinal axis of the brush body and inscribed in the rotating brush.

[0023] In order to limit the size of the suction head, in particular to allow the suction head to pass under most low furniture (beds, chests of drawers, coffee tables, etc.), the brush diameter is less than 0.08 m. A brush diameter of less than 0.03 m does not allow the rotating brush to effectively collect debris that rests on the surface to be cleaned. In this document, debris is also referred to as dust particles.

[0024] Taking into account the aforementioned brush diameters, the brush rotation speed is between 2000 and 8000 rpm to achieve a certain tangential speed at the free ends of the bristles, which allows the brush to effectively collect the debris resting on the surface to be cleaned and allows the collected debris to be ejected towards the rear of the suction chamber.

[0025] The invention allows the cleaning sheet to be positioned at an optimal angle relative to the row of bristles, taking into account the diameter of the brush and the rotation speed of the brush, and therefore the tangential speed at the free end of the bristles. The invention thus allows the cleaning sheet to effectively drive the dust ejected into the air by the scraping action of the row of bristles towards the suction opening, thereby significantly increasing the amount of dust sucked by the suction head each time the suction head passes over a predetermined area of ​​the surface to be cleaned.

[0026] If the angle of deviation of the cleaning sheet relative to the bristle row is too large relative to the tangential velocity at the free end of the bristles, so that the deviation angle expressed in degrees is not proportional to the tangential velocity expressed in ms, -1 The ratio of the tangential speed represented is greater than 3.5, so that the cleaning sheet is not allowed to capture the volatile dust ejected into the air by the scraping action of the bristle row sufficiently. In fact, in this configuration, most of the volatile dust will fall back to the ground before being captured by the cleaning sheet.

[0027] On the contrary, if the deflection angle of the cleaning sheet relative to the bristle row is too small relative to the tangential velocity at the free end of the bristles, the deflection angle expressed in degrees is not proportional to the tangential velocity expressed in ms. -1 If the ratio of the tangential velocities represented is less than 2.5, the cleaning sheet is no longer allowed to adequately capture the volatile dust ejected into the air by the scraping action of the bristle row. In fact, in this configuration, the cleaning sheet is too close to the bristle bar and most of the volatile dust ejected into the air by the scraping action of the bristle row is ejected behind the cleaning sheet and is therefore not captured by the cleaning sheet.

[0028] The specific positioning of the cleaning flakes of the suction head according to the invention therefore results in an enhanced cleaning performance of the suction head.

[0029] The suction head may also have one or more of the following features, alone or in combination.

[0030] According to one embodiment of the invention, the body comprises a suction duct leading to the suction chamber, for example to the rear of the suction chamber.

[0031] According to one embodiment of the invention, the cleaning sheet is configured to drive dust suspended in the air and located behind the row of bristles towards the suction opening, and for example drives the dust towards the rear of the suction chamber.

[0032] According to one embodiment of the invention, the brush body has a generally tubular shape.

[0033] According to one embodiment of the present invention, the deviation angle is between 20° and 90°, advantageously between 25° and 55°, for example between 32° and 46°. Such positioning of the cleaning flakes further facilitates the cleaning flakes to entrain dust particles suspended in the air, thereby further enhancing the cleaning performance of the cleaning head according to the present invention.

[0034] According to one embodiment of the present invention, when the brush body is driven to rotate at a predetermined speed, the tangential speed at the free end of the bristles of the bristle row is between 8 and 26 m.s. -1 This tangential speed is further conducive to the cleaning sheet entraining dust particles suspended in the air, thereby further enhancing the cleaning performance of the cleaning head according to the present invention.

[0035] In fact, when the tangential velocity is lower than 8m.s -1 When the dust particles collected by the rotating brush cannot be driven at a sufficient speed, thereby not allowing them to reach the rear of the suction chamber.

[0036] When the tangential speed is higher than 26m.s -1 When the dust particles collected by the rotating brush are particularly bounced off the wall at the rear of the suction chamber and cannot be sucked by the suction duct of the suction head.

[0037] According to one embodiment of the invention, the bristle rows extend helically around the central longitudinal axis of the brush body and the cleaning flakes extend helically around the central longitudinal axis of the brush body.

[0038] According to one embodiment of the invention, the bristle rows and the cleaning flakes extend at substantially the same helix angle relative to a central longitudinal axis of the brush body.

[0039] According to one embodiment of the invention, the bristle row and the cleaning flake are spaced apart from each other by a separation distance which is substantially constant along the bristle row.

[0040] According to one embodiment of the invention, the cleaning sheet is elastically deformable.

[0041] According to another embodiment of the present invention, the cleaning sheet may be rigid or semi-rigid.

[0042] According to one embodiment of the present invention, the bristles of the bristle row protrude from the outer peripheral surface of the brush body by a first protrusion distance, and the cleaning flake protrudes from the outer peripheral surface of the brush body by a second protrusion distance, the second protrusion distance being less than the first protrusion distance. Typically, the bristles of the bristle row have a first protrusion distance of 4 to 10 mm, for example 8 mm, measured radially from the outer peripheral surface of the brush body, and the flake has a second protrusion distance of 3 to 6 mm, for example 4 mm, measured radially from the outer peripheral surface of the brush body, which is less than the first protrusion distance.

[0043] According to one embodiment of the present invention, the bristles of the bristle row are configured to interact with the surface to be cleaned, such as a soft floor, and in particular to rub the surface to be cleaned when the suction head is displaced over the surface to be cleaned.

[0044] According to an embodiment of the invention, the cleaning sheet is configured not to interact with the surface to be cleaned when the suction head is displaced over said surface to be cleaned.

[0045] According to one embodiment of the invention, the bristles of the bristle row are configured to protrude from the suction opening.

[0046] According to one embodiment of the invention, the cleaning sheet is configured to be positioned to be retracted from the suction opening.

[0047] According to one embodiment of the present invention, the cleaning sheet includes a fastening portion that is, for example, removably fastened to the brush body, and a cleaning portion extending from the fastening portion.

[0048] According to one embodiment of the invention, the cleaning portion is oriented substantially radially with respect to a central longitudinal axis of the brush body.

[0049] According to one embodiment of the present invention, the cleaning sheet has a generally T-shaped cross-section.

[0050] According to one embodiment of the present invention, the fastening portion of the cleaning sheet is, for example, removably fastened in a fastening cutout provided on the outer peripheral surface of the brush body.

[0051] According to one embodiment of the invention, the bristles of the bristle rows extend substantially radially with respect to a central longitudinal axis of the brush body.

[0052] According to one embodiment of the invention, the rotating brush comprises a fastening strip which is fastened, for example removably, to the brush body, the bristles of the bristle rows being connected to the fastening strip.

[0053] According to one embodiment of the invention, the fastening strip is, for example, removably fastened in a strip cutout provided on the outer peripheral surface of the brush body.

[0054] According to one embodiment of the invention, the fastening strip and the row of bristles form a scraping member.

[0055] According to one embodiment of the present invention, the rotating brush includes a plurality of cleaning flakes and a plurality of bristle rows, and the bristle rows and the cleaning flakes are alternately arranged on the periphery of the brush body.

[0056] According to one embodiment of the present invention, the means for driving rotation comprises a drive motor rotationally coupled to the rotating brush.

[0057] According to one embodiment of the invention, the brush body defines a motor recess for accommodating the drive motor.

[0058] According to an embodiment of the invention, the brush body is configured to be removably mounted in a suction chamber defined by the main body, for example along a mounting direction extending transversely to the displacement direction of the suction head, preferably perpendicular to the displacement direction of the suction head.

[0059] According to one embodiment of the present invention, the main body includes a channel opening opening in the suction chamber, the brush body is suitable for being introduced into and extracted from the suction chamber through the channel opening, and the suction head includes a closing plug configured to close the channel opening, and the brush body is installed to be rotatable relative to the closing plug.

[0060] According to this embodiment of the invention, the passage opening is arranged on the side surface of the main body.

[0061] According to an embodiment of the present invention, the suction opening has an elongated shape and extends transversely to the displacement direction of the suction head, for example, perpendicularly to the displacement direction of the suction head.

[0062] The present invention also relates to a method for controlling a suction head, comprising the following steps:

[0063] - A suction head is provided, comprising:

[0064] a main body including a lower surface configured to be oriented facing the surface to be cleaned, and a suction port opening in the lower surface of the main body, the main body defining a suction chamber fluidly connected to the suction port,

[0065] A rotating brush accommodated in a suction chamber, the brush having a brush diameter of between 0.03 and 0.08 m, advantageously between 0.03 and 0.065 m, and for example equal to 0.06 m, and comprising a brush body having a central longitudinal axis and configured to be driven in rotation along a predetermined rotational orientation and about a rotational axis substantially coaxial with the central longitudinal axis of the brush body, a row of bristles arranged on the outer peripheral surface of the brush body and extending over at least part of the length of the brush body, and a cleaning sheet arranged on the outer peripheral surface of the brush body and extending over at least part of the length of the brush body, the cleaning sheet being angularly offset from the row of bristles at a deviation angle relative to the central longitudinal axis of the brush body and being located behind the row of bristles relative to the predetermined rotational orientation of the brush body, and

[0066] a device for driving rotation, which is configured to drive the brush body to rotate about a rotation axis,

[0067] - driving the brush body to rotate at a predetermined rotation speed between 2000 and 8000 rpm, the brush diameter and the predetermined rotation speed being defined so that the deflection angle expressed in degrees is proportional to the deflection angle expressed in ms. -1 The ratio of the tangential velocities at the free ends of the bristles of the represented bristle rows is between 2.5 and 3.5. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In any case, the invention will be well understood with the help of the following description with reference to the accompanying drawings which show, by way of non-limiting example, an embodiment of such a suction head.

[0069] Figure 1 is a partial three-quarter front view of a suction head according to the present invention.

[0070] Figure 2 yes Figure 1 Partial three-quarter front view of the suction head.

[0071] Figure 3 yes Figure 1 A three-dimensional view of the rotating brush of a suction head.

[0072] Figure 4 yes Figure 3 A three-dimensional view of the rotating brush.

[0073] Figure 5 yes Figure 1 Partial three-quarter front view of the suction head.

[0074] Figure 6 yes Figure 1 Longitudinal section view of the suction head.

[0075] Figure 7 yes Figure 1 Transverse cross-sectional view of the suction head. DETAILED DESCRIPTION

[0076] Figures 1 to 7 A suction head 2 is shown, which comprises a connection sleeve 3, to which a joint of a rigid or flexible tube is designed to be connected, which itself is connected to the suction system of a vacuum cleaner (not shown). Various different models of vacuum cleaners are already available on the market, and these different models can be used with the suction head 2 according to the invention; since these different models are known to those skilled in the art, they are not described in detail in this patent application.

[0077] The suction head 2 comprises a body 4 configured to be displaced on a surface to be cleaned. The connecting sleeve 3 is advantageously mounted to be pivotably coupled relative to the body 4, thereby allowing the body 4 to pivot forwards and backwards when the suction head 2 is displaced in the displacement direction D1.

[0078] The body 4 comprises a bottom plate 5 having a lower surface 6, the lower surface 6 being configured to be oriented toward the surface to be cleaned, and a suction opening 7 opening on the lower surface 6. The suction opening 7 may, for example, have an elongated shape and extend transversely to the displacement direction D1 of the suction head 2, for example, perpendicularly to the displacement direction D1 of the suction head 2.

[0079] The body 4 also comprises a suction chamber 8 which opens in the lower surface 6 of the base plate 5 via a suction opening 7 and is fluidically connected to the connection sleeve 3, in particular via a suction duct 9 which can be formed, for example, at least partially by a flexible coupling duct. Advantageously, the suction duct 9 opens into the rear of the suction chamber 8.

[0080] The suction head 2 further comprises a rotating brush 11 having a brush diameter of between 0.03 and 0.08 m, for example between 0.03 and 0.065 m. The rotating brush 11 comprises a brush body 12 having a generally tubular shape and having a central longitudinal axis A. Advantageously, the brush body 12 is cylindrical with a circular cross section. The brush body 12 is mounted so as to be rotatably movable in the suction chamber 8 about a rotation axis substantially coaxial with the central longitudinal axis A of the brush body 12, and is configured to be driven in rotation along a predetermined rotation direction, the predetermined rotation direction being in the suction chamber 8. Figure 7 This is schematically illustrated by an arrow pointing in an upward counterclockwise direction.

[0081] Advantageously, the brush body 12 is removably mounted in the suction chamber 8 and is configured to be introduced into and extracted from the suction chamber 8 along a mounting direction D2. The mounting direction D2 extends transversely to the displacement direction D1 of the suction head 2, preferably perpendicularly to the displacement direction D1 of the suction head 2.

[0082] According to the embodiment shown in the figures, the body 4 comprises a passage opening 13 opening in the suction chamber 8, through which the brush body 12 can be introduced into and extracted from the suction chamber 8. Advantageously, the passage opening 13 is arranged on the side of the body 4.

[0083] According to the embodiment shown in the figure, the rotating brush 11 includes a plurality of bristle rows 14, for example two bristle rows, arranged on the outer peripheral surface of the brush body 12, and a plurality of cleaning flakes 15, for example elastically deformable or rigid cleaning flakes, arranged on the outer peripheral surface of the brush body 12. Advantageously, these bristle rows 14 and these cleaning flakes 15 are arranged alternately on the periphery of the brush body 12. However, according to a variant embodiment of the present invention, the rotating brush 11 may include a single bristle row 14 and a single cleaning flake 15.

[0084] According to the embodiment shown in the figures, the bristle row 14 extends helically around the central longitudinal axis A of the brush body 12, and the cleaning flakes 15 extend helically around the central longitudinal axis A of the brush body 12. Advantageously, the bristle row 14 and the cleaning flakes 15 extend relative to the central longitudinal axis A of the brush body 12 at substantially the same helix angle.

[0085] Relative to the predetermined rotational orientation of the brush body 12, each cleaning sheet 15 is located behind the corresponding bristle row 14, and is more specifically configured to drive the dust lifted by the corresponding bristle row 14 and suspended behind the corresponding bristle row 14 toward the suction port 7. Advantageously, each cleaning sheet 15 and the corresponding bristle row 14 are spaced apart from each other by a separation distance, which is substantially constant along the corresponding bristle row 14.

[0086] Each cleaning flake 15 is angularly offset from the corresponding bristle row 14 with respect to the central longitudinal axis A of the brush body 12 at an offset angle α between 20° and 90°, advantageously between 25° and 55°, for example between 32° and 46°.

[0087] According to the embodiment shown in the figure, the bristles of each bristle row 14 protrude from the outer peripheral surface of the brush body 12 by a first protrusion distance, and each cleaning sheet 15 protrudes from the outer peripheral surface of the brush body 12 by a second protrusion distance, which is smaller than the first protrusion distance. In other words, the height of each cleaning sheet 15 is smaller than the height of the bristles in the corresponding bristle row 14.

[0088] According to the embodiment shown in the figure, the bristles of each bristle row 14 are configured to interact with the surface to be cleaned when the suction head 2 is displaced on the surface to be cleaned, and each cleaning sheet 15 is configured not to interact with the surface to be cleaned when the suction head 2 is displaced on the surface to be cleaned. To this end, the bristles of each bristle row 14 can be configured to protrude from the suction port 7, and each cleaning sheet 15 can be configured to be positioned to be retracted from the suction port 7.

[0089] According to the embodiment shown in the figures, each cleaning sheet 15 has a generally T-shaped cross section and comprises a fastening portion 15.1 and a cleaning portion 15.2, the fastening portion 15.1 being removably fastened in a fastening groove provided on the outer peripheral surface of the brush body 12, and the cleaning portion 15.2 extending from the corresponding fastening portion 15.1. Advantageously, the cleaning portion 15.2 of each cleaning sheet 15 is oriented substantially radially relative to the central longitudinal axis A of the brush body 12.

[0090] According to the embodiment shown in the figures, the bristles of each bristle row 14 extend substantially radially relative to the central longitudinal axis A of the brush body 12 and are fastened to a corresponding fastening strip 16 , which is for example removably fastened in a corresponding strip cutout provided on the outer peripheral surface of the brush body 12 .

[0091] The suction head 2 further comprises a closing plug 17 which is configured to close the passage opening 13 when the brush body 12 is mounted in the suction chamber 8 .

[0092] The suction head 2 further comprises a device 18 for driving rotation, which is configured to drive the brush body 12 to rotate around the axis of rotation at a predetermined rotation speed between 2000 and 8000 rpm, for example between 3000 and 5000 rpm. When the rotation speed is equal to 4100 rpm and the brush diameter is equal to 0.06 m, the deviation angle α is advantageously between 32° and 46°.

[0093] The predetermined rotation speed and the brush diameter are more specifically defined such that the deviation angle α expressed in degrees is 1 / 200 mm from the free end of the bristles of each bristle row 14 when the brush body 12 is driven to rotate at the predetermined rotation speed. -1 The ratio of the tangential speeds is between 2.5 and 3.5. When the brush body 12 is driven to rotate at a predetermined speed, the tangential speed at the free end of the bristles of each bristle row 14 can be, for example, between 8 and 26 m.s. -1 between.

[0094] The means 18 for driving the rotation more specifically comprise a drive motor 19, preferably an electric motor, which is rotationally coupled to the rotating brush 11. According to the embodiment shown in the figures, the drive motor 19 comprises an output shaft which is substantially colinear with the axis of rotation of the brush body 12 and is housed in the brush body 12. Advantageously, the rotating brush 11 comprises a first end 11.1 configured to be supported by a support element provided on the body 4 and mounted so as to be movable in rotation relative to the support element, and a second end 11.2 supported by the closure plug 17 and mounted so as to be movable in rotation relative to the closure plug 17.

[0095] In an embodiment variant of the invention, the drive motor 19 can be arranged in the suction head 2 outside the rotating brush 11. According to this variant, the output shaft of the drive motor 19 can be coupled to the rotating brush 11, for example via a gear chain or via a toothed belt, for example.

[0096] Of course, the present invention is by no means limited to the described and illustrated embodiments, which are provided as examples only. In particular, some modifications may be made in the composition of various elements or by replacement of equivalent technologies, without departing from the scope of protection of the present invention.

Claims

1. A suction head (2), comprising: a body (4) comprising a lower surface (6) configured to be oriented facing the surface to be cleaned, and a suction opening (7) opening in said lower surface (6) of said body (4), said body (4) defining a suction chamber (8) fluidically connected to said suction opening (7), - a rotating brush (11) housed in the suction chamber (8), the rotating brush (11) comprising: o a brush body (12) having a central longitudinal axis (A) and configured to be driven to rotate along a predetermined rotational direction and about a rotation axis substantially coaxial with the central longitudinal axis (A) of the brush body (12), o a row of bristles (14) disposed on the outer peripheral surface of the brush body (12) and extending over at least a portion of the length of the brush body (12), and o a cleaning sheet (15) disposed on the peripheral surface of the brush body (12) and extending over at least a portion of the length of the brush body (12), the cleaning sheet (15) being angularly offset from the bristle row (14) at an offset angle relative to the central longitudinal axis (A) of the brush body (12) and being directed to be located behind the bristle row (14) relative to the predetermined rotation of the brush body (12), and - means (18) for driving rotation, which are configured to drive the brush body (12) in rotation about the rotation axis, The invention is characterized in that the brush diameter of the rotating brush (11) is between 0.03 and 0.08 m, the device (18) for driving the rotation is configured to drive the brush body (12) to rotate at a predetermined rotation speed between 2000 and 8000 rpm, and the deviation angle expressed in degrees is the same as the deviation angle expressed in ms at the free ends of the bristles of the bristle row (14) when the brush body (12) is driven to rotate at the predetermined rotation speed. -1 The ratio of the tangential velocities indicated is between 2.5 and 3.

5.

2. The suction head (2) according to claim 1, wherein: The deviation angle is between 20° and 90°.

3. The suction head (2) according to claim 1 or 2, wherein: When the brush body (12) is driven to rotate at the predetermined rotation speed, the tangential speed at the free end of the bristles of the bristle row (14) is 8 m.s. -1 and 26m.s -1 between.

4. The suction head (2) according to any one of claims 1 to 3, wherein: The bristle row (14) extends helically around the central longitudinal axis (A) of the brush body (12), and the cleaning flake (15) extends helically around the central longitudinal axis (A) of the brush body (12).

5. The suction head (2) according to claim 4, wherein: The bristle rows (14) and the cleaning flakes (15) extend at substantially the same helix angle relative to the central longitudinal axis (A) of the brush body (12).

6. The suction head (2) according to any one of claims 1 to 5, wherein: The bristle row (14) and the cleaning sheet (15) are spaced apart from each other by a separation distance which is substantially constant along the bristle row (14).

7. The suction head (2) according to any one of claims 1 to 6, wherein: The cleaning sheet (15) is elastically deformable.

8. The suction head (2) according to any one of claims 1 to 7, wherein: The bristles of the bristle row (14) protrude from the outer peripheral surface of the brush body (12) by a first protrusion distance, and the cleaning sheet (15) protrudes from the outer peripheral surface of the brush body (12) by a second protrusion distance, which is smaller than the first protrusion distance.

9. The suction head (2) according to any one of claims 1 to 8, wherein: The cleaning sheet (15) comprises a fastening portion (15.1) which is, for example, removably fastened to the brush body (12) and a cleaning portion (15.2) which extends from the fastening portion (15.1).

10. The suction head (2) according to claim 9, wherein: The cleaning portion (15.2) is oriented substantially radially relative to the central longitudinal axis (A) of the brush body (12).

11. The suction head (2) according to any one of claims 1 to 10, wherein: The rotating brush (11) comprises a plurality of cleaning flakes (15) and a plurality of bristle rows, wherein the bristle rows and the cleaning flakes (15) are alternately arranged on the periphery of the brush body (12).

12. A method for controlling a suction head (2), comprising the following steps: - providing a suction head (2) comprising: o a body (4) comprising a lower surface (6) configured to be oriented facing the surface to be cleaned, and a suction opening (7) opening in the lower surface (6) of the body (4), the body (4) defining a suction chamber (8) fluidically connected to the suction opening (7), o a rotating brush (11) housed in the suction chamber (8), the brush diameter of the rotating brush (11) being between 0.03 and 0.08 m and comprising a brush body (12), the brush body having a central longitudinal axis (A) and being configured to be driven to rotate along a predetermined rotation direction and around a rotation axis substantially coaxial with the central longitudinal axis (A) of the brush body (12), a row of bristles (14) arranged on the outer peripheral surface of the brush body (12) and extending over at least part of the length of the brush body (12), and a cleaning sheet (15) arranged on the outer peripheral surface of the brush body (12) and extending over at least part of the length of the brush body (12), the cleaning sheet (15) being angularly deviated from the row of bristles (14) at a deviation angle relative to the central longitudinal axis (A) of the brush body (12) and being located behind the row of bristles (14) relative to the predetermined rotation direction of the brush body (12), and o a device (18) for driving rotation, which is configured to drive the brush body (12) to rotate around the rotation axis, - driving the brush body (12) to rotate at a predetermined rotation speed between 2000 and 8000 rpm, the brush diameter and the predetermined rotation speed being defined so that the deviation angle expressed in degrees is proportional to the deviation angle expressed in ms -1 The ratio of the tangential velocities at the free ends of the bristles of the bristle row (14) is represented to be between 2.5 and 3.5.

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