Suction head equipped with a rotating brush with a cleaning blade

Abstract

The suction head (2) includes a main body (4), a brush main body (12) housed in the main body (4) and configured to rotate and be driven about a predetermined rotation direction and a rotation axis, a row of bristles (14) provided on the outer peripheral surface of the brush main body (12), and a cleaning blade (15) provided on the outer peripheral surface of the brush main body (12). The cleaning blade (15) is rotationally offset angularly from the row of bristles (14) with respect to the central longitudinal axis (A) of the brush main body (12), and is located behind the row of bristles (14) with respect to the predetermined rotation direction of the brush main body (12). The suction head (2) comprises a rotary brush (15).

Description

Technical Field

[0001] The present invention relates to the field of vacuum cleaners having a suction head capable of sucking up dust and waste present on the surface to be cleaned.

Background Art

[0002] Vacuum cleaners equipped with a suction head are well known in the market as they enable them to clean the surface by suction to remove the dust and waste thereon. The surface on which the vacuum cleaner is applied can be, for example, tiles, parquet, laminate, carpet, or rug.

[0003] The suction head comprises a main body having a sole plate with a lower surface intended to be placed adjacent to the surface to be cleaned during use of the suction head, and a suction port opening into the lower surface of the sole plate.

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

[0005] - A rotating brush comprising a brush body housed in a suction chamber separated by the main body of the suction head and rotatably movable about a rotation axis, a row of bristles provided on the outer peripheral surface of the brush body, and a protective blade provided on the outer peripheral surface of the brush body and disposed behind the row of bristles. - A rotation drive device configured to rotate the brush body about a rotation axis.

[0006] The row of bristles has the main function of rubbing the floor to be cleaned, especially when the floor to be cleaned is a soft floor such as a carpet or a rug, and the protective blade has the function of restricting the entanglement of hair or similar waste around the brush body.

[0007] When the bristles of a row of bristles rub against the carpet, the dust particles contained in the carpet are thrown by the bristles of the row of bristles towards the suction port and are thus sucked up by the vacuum cleaner. After the scraping action performed by the row of bristles, the carpet fibers deformed by the row of bristles return to their original positions and then throw the dust particles suspended in the air.

[0008] Depending on the brush diameter of the rotating brush and the rotational speed of the rotating brush, the tangential speed at the free end of the bristles and the free end of the cleaning blade can be made higher or lower.

[0009] Therefore, depending on the offset angle between the row of bristles and the protective blade and the tangential speed of the free end of the cleaning blade, the dust particles thrown by the carpet fibers after the scraping action are likely to fall to the floor by gravity or be thrown into the air after passing through the cleaning blade before being connected by the protective blade towards the suction port, so they are behind the protective blade.

[0010] Therefore, it has been proven that the cleaning performance of the vacuum cleaner of the aforementioned type is insufficient.

Summary of the Invention

[0011] The present invention aims to correct all or part of these defects.

[0012] The basic technical problem of the present invention is, in particular, to provide a suction head with a simple structure while improving the cleaning performance.

[0013] For this purpose, the present invention regarding the suction head is - The main body includes a lower surface configured to be oriented towards the surface to be cleaned and a suction port opened on the lower surface of the main body. The main body defines a suction chamber fluidly connected to the suction port. - A rotating brush housed in the suction chamber, A brush body having a central longitudinal axis and configured to be driven to rotate about a rotation axis in a predetermined rotation direction and substantially coaxial with the central longitudinal axis of the brush body; A row of bristles provided on an outer peripheral surface of the brush body and extending over at least a part of the length of the brush body; A cleaning blade provided on the outer peripheral surface of the brush body and extending over at least a part of the length of the brush body, the cleaning blade being angularly offset from the row of bristles by an offset angle with respect to the central longitudinal axis of the brush body and being disposed behind the row of bristles with respect to the predetermined rotation direction of the brush body; A rotary brush comprising; A rotary drive device configured to rotate the brush body about a rotation axis; Comprising.

[0014] The rotary brush has a brush diameter of 0.03 to 0.08 m, for example 0.03 to 0.065 m, and the rotary drive device is configured to rotate the brush body at a predetermined rotational speed of 2000 to 8000 rpm, preferably 3000 to 5000 rpm, for example about 4100 rpm. When the brush body is rotationally driven at a predetermined rotational speed between 2.5 and 3.5, at the free ends of the bristles of the row of bristles, there is a ratio of the offset angle expressed in degrees to the tangential speed expressed in m.s -1 And.

[0015] In this specification, "brush diameter" should be understood as the outer diameter of the rotary brush measured at the free ends of the bristles. In other words, the brush diameter corresponds to the diameter of the circle around which the rotary brush is inscribed, centered on the central longitudinal axis of the brush body.

[0016] To limit the size of the suction head and enable it to pass under furniture where the latter is lowest, especially beds, drawer boxes, 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 the waste lying on the surface to be cleaned. In this specification, waste is also called dust particles.

[0017] Considering the aforementioned brush diameter, the rotational speed of the brush is 2000 - 8000 rpm, reaching the tangential speed at the free end of the bristles, enabling the brush to effectively collect the waste lying on the surface to be cleaned and throw the collected waste towards the rear of the suction chamber.

[0018] The present invention enables the optimal placement of the cleaning blade at an angle with respect to a row of bristles, taking into account the diameter and rotational speed of the brush, and thus the tangential speed at the free end of the bristles. Therefore, the present invention enables the cleaning blade to efficiently carry the dust thrown into the air by the scraping action of a row of bristles towards the suction port, and thus significantly increases the amount of dust sucked in by the suction head each time it passes through a predetermined area of the surface to be cleaned.

[0019] If the offset angle of the cleaning blade with respect to a row of bristles is too large with respect to the tangential speed at the free end of the bristles, and the ratio of the offset angle expressed in degrees to the tangential speed expressed in m.s -1 is greater than 3.5, the cleaning blade cannot sufficiently capture the volatile dust thrown into the air by the scraping action of a row of bristles. In fact, in such a configuration, most of the volatile dust falls to the floor before being captured by the cleaning blade.

[0020] If the offset angle of the cleaning blade with respect to a row of bristles is conversely too small with respect to the tangential speed at the free end of the bristles, and the offset angle expressed in degrees and m.s -1When the ratio to the tangential speed represented by is less than 2.5, the cleaning blade also cannot capture sufficient dust thrown into the air by the scraping action of a row of hairs. In fact, in such a configuration, the cleaning blade is too close to the hair rod, and most of the volatile dust thrown into the air by the scraping action of a row of hairs is thrown behind the cleaning blade, and as a result, this volatile dust is not captured.

[0021] Therefore, the specific positioning of the cleaning blade of the suction head according to the present invention improves the latter's cleaning performance.

[0022] The suction head may further have one or more of the following features, either alone or in combination.

[0023] According to an embodiment of the present invention, the main body includes a suction duct that opens into the suction chamber, for example, at the rear of the suction chamber.

[0024] According to an embodiment of the present invention, the cleaning blade is configured to carry the dust suspended in the air and disposed behind a row of hairs toward the suction port, for example, configured to carry the dust toward the rear of the suction chamber.

[0025] According to an embodiment of the present invention, the brush body generally has a tubular shape.

[0026] According to an embodiment of the present invention, the offset angle is 20 to 90°, preferably 25 to 55°, and for example 32 to 46°. Such positioning of the cleaning blade further promotes the connection of dust particles suspended in the air by the cleaning blade, and thus further improves the cleaning performance of the cleaning head according to the present invention.

[0027] According to an embodiment of the present invention, when the brush body is rotated and driven at a predetermined rotational speed, the tangential speed at the free ends of the hairs of a row of hairs is 8 to 26 m·s -1That is the case. Such a tangential speed further promotes the entrainment of dust particles suspended in the air by the cleaning blade, and thus further improves the cleaning performance of the cleaning head according to the present invention.

[0028] Actually, at a tangential speed of less than 8 m / s, the dust particles collected by the rotating brush do not have a sufficient speed to enable them to reach the rear of the suction chamber. -1 At a tangential speed of less than 8 m / s, the dust particles collected by the rotating brush do not have a sufficient speed to enable them to reach the rear of the suction chamber.

[0029] When the tangential speed exceeds 26 m / s, the dust particles collected by the rotating brush cannot be sucked up by the suction duct of the suction head and are reflected by a specific wall at the rear of the suction chamber. -1 When the tangential speed exceeds 26 m / s, the dust particles collected by the rotating brush cannot be sucked up by the suction duct of the suction head and are reflected by a specific wall at the rear of the suction chamber.

[0030] According to one embodiment of the present invention, a row of bristles extends helically about the central longitudinal axis of the brush body, and the cleaning blade extends helically about the central longitudinal axis of the brush body.

[0031] According to one embodiment of the present invention, a row of bristles and the cleaning blade extend at substantially the same helix angle with respect to the central longitudinal axis of the brush body.

[0032] According to one embodiment of the present invention, a row of bristles and the cleaning blade are spaced apart from each other by a separation distance that is substantially constant along the row of bristles.

[0033] According to one embodiment of the present invention, the cleaning blade is elastically deformable.

[0034] According to another embodiment of the present invention, the cleaning blade can be rigid or semi-rigid.

[0035] According to an embodiment of the present invention, the bristles of a row of bristles protrude from the outer peripheral surface of the brush body by a first protrusion distance, and the cleaning blade protrudes from the outer peripheral surface of the brush body by a second protrusion distance smaller than the first protrusion distance. Typically, the bristles of the row of bristles 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 cleaning blade 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 smaller than the first protrusion distance.

[0036] According to an embodiment of the present invention, the bristles of a row of bristles are configured to interact with a surface to be cleaned, such as a soft floor, and in particular to rub against the surface to be cleaned when the suction head is moved over the surface to be cleaned.

[0037] According to an embodiment of the present invention, the cleaning blade is configured not to interact with the surface to be cleaned when the suction head is moved over the surface to be cleaned.

[0038] According to an embodiment of the present invention, the bristles of a row of bristles are configured to protrude from the suction port.

[0039] According to an embodiment of the present invention, the cleaning blade is configured to be recessed from the suction port.

[0040] According to an embodiment of the present invention, the cleaning blade includes, for example, a fastening portion removably fixed to the brush body and a cleaning portion extending from the fastening portion.

[0041] According to an embodiment of the present invention, the cleaning portion is substantially radially oriented with respect to the central longitudinal axis of the brush body.

[0042] According to an embodiment of the present invention, the cleaning blade has a cross-section that is generally T-shaped.

[0043] According to an embodiment of the present invention, the fastening portion of the cleaning blade is removably fastened to, for example, a fastening groove provided on the outer peripheral surface of the brush body.

[0044] According to an embodiment of the present invention, the bristles of a row of bristles extend substantially radially with respect to the central longitudinal axis of the brush body.

[0045] According to an embodiment of the present invention, the rotary brush includes, for example, a fastening bar removably fixed to the brush body, and the bristles of a row of bristles are fixed to the fastening bar.

[0046] According to an embodiment of the present invention, the fastening bar is removably fastened, for example, in a bar groove provided on the outer peripheral surface of the brush body.

[0047] According to an embodiment of the present invention, the fastening bar and the row of bristles form a scraping member.

[0048] According to an embodiment of the present invention, the rotary brush includes several cleaning blades and several rows of bristles, and a row of bristles and the cleaning blades are alternately arranged around the brush body.

[0049] According to an embodiment of the present invention, the rotary drive device includes a drive motor rotatably coupled to the rotary brush.

[0050] According to an embodiment of the present invention, the brush body defines a motor housing in which the drive motor is accommodated.

[0051] According to an embodiment of the present invention, the brush body is configured to be removably attached, for example, in a suction chamber separated by the body in a lateral direction, preferably a vertical direction, in the moving direction of the suction head.

[0052] According to one embodiment of the present invention, the main body includes a passage opening that opens into the suction chamber, through which the brush main body can be introduced into and removed from the suction chamber. The suction head includes a closing cap configured to close the passage opening, and the brush main body is movably attached to the closing cap.

[0053] According to an embodiment of the present invention, the passage opening is provided on the side surface of the main body.

[0054] According to one embodiment of the present invention, the suction port has an elongated shape and extends in a direction transverse to the moving direction of the suction head, for example, in a vertical direction.

[0055] The present invention further relates to a method for controlling a suction head, which includes the following steps.

[0056] - A step of providing a suction head, A main body including a lower surface configured to be oriented toward a 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, A rotary brush housed in the suction chamber, having a brush diameter of 0.03 to 0.08 m, preferably 0.03 to 0.065 m, and for example equal to 0.06 m, having a central longitudinal axis, and configured to be driven around a rotation axis in a predetermined rotation direction and substantially coaxial with the central longitudinal axis of the brush main body. The rotary brush includes a row of bristles provided on the outer peripheral surface of the brush main body and extending over at least a part of the length of the brush main body, and a cleaning blade provided on the outer peripheral surface of the brush main body and extending over at least a part of the length of the brush main body. The cleaning blade is angularly offset from the row of bristles by an offset angle with respect to the central longitudinal axis of the brush main body and is located behind the row of bristles with respect to the predetermined rotation direction of the brush main body. Providing a suction head comprising a rotary drive device configured to rotationally drive the brush body about the rotary shaft; - Rotating the brush body at a predetermined rotational speed of 2000 to 8000 rpm, where the brush diameter and the predetermined rotational speed are such that the ratio of the offset angle represented in degrees to the tangential speed of the free ends of the rows of bristles represented in m.s is defined to be between 2.5 and 3.5. -1 Rotating step, wherein the ratio of the offset angle represented in degrees to the tangential speed of the free ends of the rows of bristles represented in m.s is defined to be between 2.5 and 3.5.

Brief Description of the Drawings

[0057] In any case, the present invention will be better understood with reference to the following description, using, as non-limiting examples, the attached schematic diagrams representing embodiments of this suction head.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0058] FIGS. 1 - 7 represent a suction head 2 comprising a connection sleeve 3 intended to connect the end piece of a rigid or flexible tube, which is itself connected to the suction system of a vacuum cleaner (not shown). There are already various modified vacuum cleaners on the market that can be used with the suction head 2 according to the present invention, but since these modifications are known to those skilled in the art, they will not be described in detail herein.

[0059] The suction head 2 comprises a body 4 configured to be moved over the surface to be cleaned. The connection sleeve 3 is preferably attached to the body 4 with a pivot link so as to enable the body 4 to pivot forward and backward during movement in the moving direction D1 of the suction head 2.

[0060] The body 4 comprises a sole plate 5 having a lower surface 6 configured to be oriented towards the surface to be cleaned, and a suction port 7 opening in the lower surface 6. The suction port 7 has, for example, an elongated shape and may extend, for example, vertically and laterally with respect to the moving direction D1 of the suction head 2.

[0061] The body 4 further comprises a suction chamber 8 which opens into the lower surface 6 of the sole plate 5 via the suction port 7 and is fluidly connected to the connection sleeve 3 by a suction duct 9 which may be at least partially formed, in particular, by a flexible connection duct. Advantageously, the suction duct 9 opens at the rear of the suction chamber 8.

[0062] The suction head 2 also comprises a rotary brush 11 having a brush diameter of 0.03 to 0.08 m and, for example, 0.03 to 0.065 m. The rotary brush 11 generally has a tubular shape and comprises a brush body 12 having a central longitudinal axis A. Advantageously, the brush body 12 is cylindrical with a circular section. The brush body 12 is rotatably mounted in the suction chamber 8 about a rotation axis which is substantially coaxial with the central longitudinal axis A of the brush body 12 and is configured to rotate and be driven in a predetermined rotation direction, which is illustrated in FIG. 7 by an arrow rotating counterclockwise.

[0063] Advantageously, the brush body 12 is removably attached to the suction chamber 8 and is configured to be introduced into the suction chamber 8 and removed from the suction chamber 8 in the attachment direction D2. The attachment direction D2 extends laterally, preferably perpendicularly, with respect to the moving direction D1 of the suction head 2.

[0064] According to the embodiment shown in the figure, the main body 4 includes a passage opening 13 that opens into the suction chamber 8, through which the brush body 12 can be introduced into and removed from the suction chamber 8. Advantageously, the passage opening 13 is provided on the side surface of the main body 4.

[0065] According to the embodiment shown in the figure, the rotary brush 11 includes several rows of bristles 14, for example two rows of bristles, provided on the outer peripheral surface of the brush body 12, and several cleaning blades 15, for example those that are elastically deformable or rigid, provided on the outer peripheral surface of the brush body 12. Advantageously, the rows of bristles 14 and the cleaning blades 15 are alternately arranged around the circumference of the brush body 12. However, according to a variant of the present invention, the rotary brush 11 can include a single row of bristles 14 and a single cleaning blade 15.

[0066] According to the embodiment shown in the figure, the rows of bristles 14 extend spirally around the central longitudinal axis A of the brush body 12, and the cleaning blades 15 extend spirally around the central longitudinal axis A of the brush body 12. Advantageously, the rows of bristles 14 and the cleaning blades 15 extend at substantially the same helix angle with respect to the central longitudinal axis A of the brush body 12.

[0067] Each cleaning blade 15 is located behind the bristles 14 of each row with respect to the predetermined rotation direction of the brush body 12. More specifically, it is lifted by the bristles 14 of each row and is configured to carry the dust suspended towards the suction port 7 behind the bristles 14 of each row. Advantageously, each cleaning blade 15 and the bristles 14 of each row are spaced apart from each other by a substantially constant separation distance along the bristles 14 of each row.

[0068] Each cleaning blade 15 is angularly offset from the bristles 14 of each row by an offset angle α of 20 - 90°, advantageously 25 - 55°, and for example 32 - 46° with respect to the central longitudinal axis A of the brush body 12.

[0069] According to the embodiment shown in the figure, the bristles in each row of the bristles 14 protrude from the outer peripheral surface of the brush body 12 by a first protrusion distance, and each cleaning blade 15 protrudes from the outer peripheral surface of the brush body 12 by a second protrusion distance smaller than the first protrusion distance. In other words, each cleaning blade 15 has a height smaller than the height of the bristles in each row of the bristles 14.

[0070] According to the embodiment shown in the figure, the bristles in each row of the bristles 14 are configured to interact with the surface to be cleaned when the suction head 2 is moved onto the surface to be cleaned, and each cleaning blade 15 is configured not to interact with the surface to be cleaned when the suction head 2 is moved onto the surface to be cleaned. For this purpose, the bristles in each row of the bristles 14 can be configured to protrude from the suction port 7, while each cleaning blade 15 can be configured to recess from the suction port 7.

[0071] According to the embodiment shown in the figure, each cleaning blade 15 generally has a T-shaped cross-section and includes, for example, a fastening portion 15.1 removably fixed in a fastening groove provided on the outer peripheral surface of the brush body 12, and a cleaning portion 15.2 extending from each fastening portion 15.1. Advantageously, the cleaning portion 15.2 of each cleaning blade 15 is oriented substantially radially with respect to the central longitudinal axis A of the brush body 12.

[0072] According to the embodiment shown in the figure, the bristles in each row of the bristles 14 extend substantially radially with respect to the central longitudinal axis A of the brush body 12 and are fixed, for example, to respective fastening bars 16 removably fixed in respective bar grooves provided on the outer peripheral surface of the brush body 12.

[0073] The suction head 2 further includes a closing cap 17 configured to close the passage opening 13 when the brush body 12 is attached to the suction chamber 8.

[0074] The suction head 2 also includes a rotary drive device 18 configured to rotate the brush body 12 at a predetermined rotational speed between 2000 rpm and 8000 rpm and, for example, between 3000 rpm and 5000 rpm about the axis of rotation. The offset angle α is preferably between 32 and 46° when the rotational speed is equal to 4100 rpm and the brush diameter is equal to 0.06 m.

[0075] The predetermined rotational speed and brush diameter are more specifically defined such that when the brush body 12 is rotated and driven at the predetermined rotational speed, the ratio between the offset angle α, expressed in degrees, at the free ends of the bristles of each row of bristles 14 and the -1 tangential speed expressed in m·s is between 2.5 and 3.5.

[0076] When the brush body 12 is rotated and driven at the predetermined rotational speed, the tangential speed at the free ends of the bristles of each row of bristles 14 can be, for example, 8 to 26 m·s -1 or the like.

[0077] More specifically, the rotary drive device 18 comprises a preferably electric drive motor 19 rotatably coupled to the rotary brush 11. According to the embodiment shown in the figure, the drive motor 19 comprises an output shaft that is substantially collinear with the axis of rotation of the brush body 12, and the drive motor 19 is housed in the brush body 12. Advantageously, the rotary brush 11 is provided on the body 4 and comprises a first end 11.1 configured to be supported by a support element rotatably attached to the support element, and a second end 11.2 supported by the closure cap 17 and rotatably attached to the closure cap 17.

[0078] In a variant of the invention, the drive motor 19 can be arranged on the suction head 2 outside the rotary brush 11. According to this variant, the output shaft of the drive motor 19 can be coupled to the rotary brush 11, for example, by a gear chain or a toothed type belt, for example.

[0079] Of course, the present invention is not limited to the described and illustrated embodiments given merely by way of example. In particular, regarding the configurations of various elements or by substituting with technical equivalents, changes are still possible without departing from the scope of protection of the present invention.

[0080] The present invention includes the following embodiments: [Configuration 1] A suction head (2), comprising: - A main body (4) having a lower surface (6) configured to be oriented towards the surface to be cleaned and a suction port (7) opening in the lower surface (6) of the main body (4), wherein the main body (4) defines a suction chamber (8) fluidly connected to the suction port (7), and the main body (4); - A rotary brush (11) housed in the suction chamber (8), the rotary brush (11) comprising: o A brush body (12) having a central longitudinal axis (A) and configured to rotate and be driven about a rotation axis in a predetermined rotation direction and substantially coaxial with the central longitudinal axis (A) of the brush body (12); o A row of bristles (14) provided on the outer peripheral surface of the brush body (12) and extending over at least a part of the length of the brush body (12); o A cleaning blade (15) provided on the outer peripheral surface of the brush body (12) and extending over at least a part of the length of the brush body (12), the cleaning blade (15) being angularly offset from the row of bristles (14) by an offset angle with respect to the central longitudinal axis (A) of the brush body (12) and being arranged behind the row of bristles (14) with respect to the predetermined rotation direction of the brush body (12); The rotary brush (11) comprising; - A rotary drive device (18) configured to rotationally drive the brush body (12) about the rotation axis; The rotary brush (11) has a brush diameter of 0.03 to 0.08 m, the rotary drive device (18) is configured to rotationally drive the brush body (12) at a predetermined rotational speed of 2000 to 8000 rpm, and when the brush body (12) is rotationally driven at the predetermined rotational speed, the ratio of the offset angle represented in degrees at the free end of the bristles of the row of bristles (14) of the brush body (12) to the tangential speed represented in m.s -1 is between 2.5 and 3.5. The suction head (2) is characterized by this. [Configuration 2] The suction head (2) according to Configuration 1, wherein the offset angle is between 20 and 90°. [Configuration 3] When the brush body (12) is rotated and driven at the predetermined rotational speed, the tangential speed at the free ends of the bristles of the row of bristles (14) is 8 m / s -1 to 26 m / s -1 The suction head (2) according to configuration 1 or 2, which is between. [Configuration 4] The row of bristles (14) extends helically around the central longitudinal axis (A) of the brush body (12), and the cleaning blade (15) extends helically around the central longitudinal axis (A) of the brush body (12). The suction head (2) according to any one of configurations 1 to 3. [Configuration 5] The row of bristles (14) and the cleaning blade (15) extend at substantially the same helical angle with respect to the central longitudinal axis (A) of the brush body (12). The suction head (2) according to configuration 4. [Configuration 6] The row of bristles (14) and the cleaning blade (15) are spaced apart from each other at substantially constant intervals along the row of bristles (14). The suction head (2) according to any one of configurations 1 to 5. [Configuration 7] The cleaning blade (15) is elastically deformable. The suction head (2) according to any one of configurations 1 to 6. [Configuration 8] The bristles of the row of bristles (14) protrude from the outer peripheral surface of the brush body (12) by a first protrusion distance, and the cleaning blade (15) protrudes from the outer peripheral surface of the brush body (12) by a second protrusion distance smaller than the first protrusion distance. The suction head (2) according to any one of configurations 1 to 7. [Configuration 9] The cleaning blade (15) includes, for example, a fastening portion (15.1) removably fixed to the brush body (12) and a cleaning portion (15.2) extending from the fastening portion (15.1). The suction head (2) according to any one of configurations 1 to 8. [Configuration 10] The cleaning portion (15.2) is oriented substantially radially with respect to the central longitudinal axis (A) of the brush body (12). The suction head (2) according to configuration 9. [Configuration 11] The rotary brush (11) includes a plurality of cleaning blades (15) and a plurality of rows of bristles, and the rows of bristles and the cleaning blades (15) are alternately arranged around the brush body (12). The suction head (2) according to any one of configurations 1 to 10. [Configuration 12] A method for controlling the suction head (2), - A step of providing a suction head (2), o A lower surface (6) configured to be oriented towards the surface to be cleaned, and a main body (4) including a suction port (7) opening to the lower surface (6) of the main body (4), wherein the main body (4) defines a suction chamber (8) fluidly connected to the suction port (7), a main body (4); o A rotary brush (11) housed in the suction chamber (8), wherein the rotary brush (11) has a brush diameter of 0.03 to 0.08 m, has a central longitudinal axis (A), and a brush body (12) configured to rotate about a rotation axis in a predetermined rotation direction and substantially coaxial with the central longitudinal axis (A) of the brush body (12), and a row of bristles (14) provided on an outer peripheral surface of the brush body (12) and extending over at least a part of the length of the brush body (12), and a cleaning blade (15) extending over at least a part of the length of the brush body (12), provided on the outer peripheral surface of the brush body (12), and extending over at least a part of the length of the brush body (12), wherein the cleaning blade (15) is angularly offset from the row of bristles (14) at an offset angle with respect to the central longitudinal axis (A) of the brush body (12) and is disposed behind the row of bristles (14) with respect to the predetermined rotation direction of the brush body (12), a rotary brush (11) comprising; o A rotary drive device (18) configured to rotationally drive the brush body (12) about the rotation axis; - A step of providing a suction head (2) comprising; - A step of rotating the brush body (12) at a predetermined rotational speed between 2000 rpm and 8000 rpm, wherein the brush diameter and the predetermined rotational speed are such that the ratio of the offset angle, represented as a degree with respect to the tangential velocity at the free end of the bristles of the row of bristles (14) represented in m.s -1 is defined to be between 2.5 and 3.5, a step of rotating; A method of controlling a suction head (2) including.

Claims

Claim 1 A suction head (2), comprising: - A main body (4) having a lower surface (6) configured to be oriented towards the surface to be cleaned, and a suction port (7) opening to the lower surface (6) of the main body (4), wherein the main body (4) defines a suction chamber (8) fluidly connected to the suction port (7); - A rotary brush (11) housed in the suction chamber (8), the rotary brush (11) comprising: o A brush body (12) having a central longitudinal axis (A), and configured to rotate and be driven about a rotation axis in a predetermined rotation direction and substantially coaxial with the central longitudinal axis (A) of the brush body (12); o A row of bristles (14) provided on the outer peripheral surface of the brush body (12) and extending over at least a part of the length of the brush body (12); o A cleaning blade (15) provided on the outer peripheral surface of the brush body (12) and extending over at least a part of the length of the brush body (12), the cleaning blade (15) being angularly offset from the row of bristles (14) by an offset angle with respect to the central longitudinal axis (A) of the brush body (12), and being disposed behind the row of bristles (14) with respect to the predetermined rotation direction of the brush body (12); A rotary brush (11) comprising the above; - A rotary drive device (18) configured to rotationally drive the brush body (12) about the rotation axis. The rotary brush (11) has a brush diameter of 0.03 to 0.08 m, and the rotary drive device (18) is configured to rotationally drive the brush body (12) at a predetermined rotational speed of 2000 to 8000 rpm. When the brush body (12) is rotationally driven at the predetermined rotational speed, at the free ends of the bristles of the row of bristles (14) of the brush body (12), the offset angle represented in degrees and m.s －１ The suction head (2) is characterized in that the ratio to the tangential speed represented by is between 2.5 and 3.

5. Claim 2 The suction head (2) according to claim 1, wherein the offset angle is between 20° and 90°. Claim 3 When the brush body (12) is rotated and driven at the predetermined rotational speed, the tangential speed at the free ends of the bristles of the row of bristles (14) is 8 m.s －１ to 26 m.s －１ The suction head (2) according to claim 1 or 2, wherein the suction head is between them. Claim 4 The suction head (2) according to any one of claims 1 to 3, wherein the row of bristles (14) extends helically around the central longitudinal axis (A) of the brush body (12), and the cleaning blade (15) extends helically around the central longitudinal axis (A) of the brush body (12). Claim 5 The suction head (2) according to claim 4, wherein the row of bristles (14) and the cleaning blade (15) extend at substantially the same helical angle with respect to the central longitudinal axis (A) of the brush body (12). Claim 6 The suction head (2) according to any one of claims 1 to 5, wherein the row of bristles (14) and the cleaning blade (15) are spaced apart from each other at substantially constant intervals along the row of bristles (14).

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

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

9. The suction head (2) according to any one of claims 1 to 8, wherein the cleaning blade (15) includes, for example, a fastening portion (15.1) removably fixed to the brush body (12) and a cleaning portion (15.2) extending 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 with respect 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 rotary brush (11) includes a plurality of cleaning blades (15) and a plurality of rows of bristles, and the rows of bristles and the cleaning blades (15) are alternately arranged around the brush body (12).

12. A method for controlling a suction head (2), comprising: - A step of providing a suction head (2), comprising: o A lower surface (6) configured to be oriented towards the surface to be cleaned, and a main body (4) including a suction port (7) opening in the lower surface (6) of the main body (4), wherein the main body (4) defines a suction chamber (8) fluidly connected to the suction port (7); a main body (4); o A rotating brush (11) housed in the suction chamber (8), the rotating brush (11) having a brush diameter of 0.03 to 0.08 m, having a central longitudinal axis (A), and being a brush body (12), which is configured to rotate and be driven about a rotation axis in a predetermined rotation direction and substantially coaxial with the central longitudinal axis (A) of the brush body (12); a row of bristles (14) provided on the outer peripheral surface of the brush body (12) and extending over at least a part of the length of the brush body (12); and a cleaning blade (15) extending over at least a part of the length of the brush body (12), provided on the outer peripheral surface of the brush body (12), and extending over at least a part of the length of the brush body (12), the cleaning blade (15) being angularly offset from the row of bristles (14) by an offset angle with respect to the central longitudinal axis (A) of the brush body (12) and being arranged behind the row of bristles (14) with respect to the predetermined rotation direction of the brush body (12). The rotating brush (11) comprises: o A rotation drive device (18) configured to rotationally drive the brush body (12) about the rotation axis; The step of providing a suction head (2) comprising: - rotating the brush body (12) at a predetermined rotational speed between 2000 rpm and 8000 rpm, wherein the brush diameter and the predetermined rotational speed are m.s －１ - rotating such that the ratio of the offset angle, represented by the frequency with respect to the tangential velocity at the free end of the bristles of the row of bristles (14) represented by, is between 2.5 and 3.5 A method of controlling a suction head (2) including:

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