Nozzle for vacuum cleaner and vacuum cleaner having such nozzle

Abstract

The invention relates to a vacuum cleaner nozzle configured to move over a floor surface. The suction nozzle includes a floor configured to face a floor surface during operation. The bottom plate includes a suction inlet, a front portion and a rear portion disposed at a front and a rear of the suction inlet, respectively. During normal use, the front portion includes a front surface having a length of between 5-10 millimeters in a direction substantially parallel to the floor surface and an inclined front surface having a length of between 20-26 millimeters in the same direction. The rear portion includes a rear surface having a length of between 5-10 millimeters in a direction substantially parallel to the floor surface, and an inclined rear surface having a length of between 18-24 millimeters in the same direction. The front inclined surface has an inclination of between 7 and 11 degrees with respect to the front surface, and the rear inclined surface has an inclination of between 8 and 12 degrees with respect to the rear surface. The invention also relates to a vacuum cleaner with such a nozzle.

Description

Technical Field

[0001] The present invention generally relates to the field of vacuum cleaners. More particularly, the present invention relates to a nozzle for a vacuum cleaner nozzle and a vacuum cleaner having such a nozzle. Background Art

[0002] A vacuum cleaner is a device that uses a fan device to generate a partial vacuum to suck away dust, particles, fibers, hair and other objects from floors and carpets. Typically, this is done through a vacuum cleaner nozzle, which is connected to an extension tube and / or a dust hose via a nozzle outlet, and then connected to a dust collection chamber in the main body of the vacuum cleaner. The dust hose is usually engaged with a removable dust bag arranged inside the vacuum cleaner to collect dust and foreign matter sucked in by the vacuum cleaner nozzle when the vacuum cleaner is in operating mode. In turn, the dust-containing airflow will transport the removed objects to the hose via the nozzle and to the main body of the vacuum cleaner, where the removed objects are separated from the airflow in the dust bag. Alternatively, a cyclone separator or other suitable dust separation device can also be used to separate dust from the dust-containing airflow.

[0003] A basic requirement that a vacuum cleaner nozzle must meet is a high level of dust suction on carpets. Therefore, in general, the shape of a vacuum cleaner nozzle should be such that a maximum level of dust suction can be achieved on carpets. On the other hand, maximizing the level of dust suction leads to a high resistance to movement, i.e. the vacuum cleaner nozzle can only be moved on the carpet with greater physical force due to the suction force.

[0004] Another requirement for vacuum cleaner nozzles is the ability to pick up larger particles (e.g. small stones) while also picking up fine dust. This is particularly challenging given the need to use less powerful motors to save energy. With low-power motors, it is even more important that the nozzle is optimized for the pickup of both fine dust and larger particles and does not create too high a resistance to movement during use, resulting in a good user experience. Due to the lower motor power and thus lower airflow, the geometry of the surface in contact with the floor becomes very important. The number of surfaces, their length and their inclination towards the ground all need to be optimized based on the new requirements and usability.

[0005] The disadvantages of known vacuum nozzles with high dust suction levels are increased resistance to movement, which results in a need for physical effort when cleaning carpets, and the pushing of larger particles in front of the nozzle where they cannot be sucked away. Accordingly, there is a need to improve existing vacuum cleaner nozzles to address these disadvantages. Summary of the invention

[0006] The object of embodiments of the invention is to provide an improved suction nozzle for a vacuum cleaner and a vacuum cleaner with an improved level of dust suction but with only a limited increase in the resistance to movement, if any. This object is solved by the features of the independent claims. Preferred embodiments are given in the dependent claims. If not explicitly stated, the embodiments of the invention may be freely combined with each other.

[0007] The invention is applicable to both battery-powered vacuum cleaners and mains-powered vacuum cleaners.

[0008] According to a first aspect of the present invention, the present invention relates to a vacuum cleaner nozzle configured to move on a floor surface, wherein the nozzle includes a base plate, which is configured to face the floor surface during the operation of the nozzle. The base plate includes an elongated suction port, a front portion arranged in front of the suction port, and a rear portion arranged behind the suction port. The front portion includes a front surface and an inclined front surface, which has a length between 5-10 mm in a direction substantially parallel to the floor surface during normal use, and the inclined front surface has a length between 20-26 mm in the same direction; and a rear portion, which includes a rear surface and an inclined rear surface, which has a length between 5-10 mm in a direction substantially parallel to the floor surface during normal use, and the inclined rear surface has a length between 18-24 mm in the same direction. Further, the front inclined surface has an inclination between 7-11 degrees relative to the front surface, and the rear inclined surface has an inclination between 8-12 degrees relative to the rear surface.

[0009] Therefore, the optimization of the front and rear parts improves the dust removal and large particle pickup effect. In turn, the best dust removal effect can be obtained.

[0010] According to a preferred embodiment, the nozzle comprises a pair of wheels, which are arranged behind the rear portion and preferably behind the nozzle housing.

[0011] According to a preferred embodiment, the suction nozzle comprises a housing, which is arranged above the suction nozzle base, and the housing comprises a suction channel, which connects the suction inlet to the suction nozzle outlet.

[0012] According to a preferred embodiment, during normal use, the suction opening has a length in a direction perpendicular to the advancing direction of between 250-290 mm, preferably between 265-275 mm, most preferably between 270 mm.

[0013] According to a preferred embodiment, the suction opening has a width between 15-30 mm, preferably between 20-25 mm, most preferably 22 mm.

[0014] According to a preferred embodiment, the front portion of the front inclined surface comprises a rounded portion having a radius between 3-5 mm and preferably designed to be arranged in front of the nozzle base.

[0015] Therefore, the front arc portion improves the dust removal effect in the forward cleaning direction.

[0016] According to a preferred embodiment, during normal use, the front surface has a length in a direction substantially parallel to the floor surface of between 6 and 8 millimeters, and preferably around 7 millimeters.

[0017] According to a preferred embodiment, during normal use, the rear surface has a length in a direction substantially parallel to the floor surface of between 6-8 mm, and preferably around 7 mm.

[0018] According to a preferred embodiment, the inclined front surface has a length between 23-25 ​​mm, preferably around 24 mm, in a direction perpendicular to the suction opening and parallel to the front surface.

[0019] According to a preferred embodiment, the inclined rear surface has a length between 21-23 mm, preferably around 22 mm, in a direction perpendicular to the suction opening and parallel to the rear surface.

[0020] According to a preferred embodiment, the front inclined surface has an inclination between 8-10 degrees, preferably around 9 degrees.

[0021] According to a preferred embodiment, the rear inclined surface has an inclination between 9-11 degrees, preferably around 10 degrees.

[0022] According to a preferred embodiment, the base plate is made in one piece.

[0023] Preferably, thereby, the dust removal effect can be improved regardless of the direction of movement of the vacuum cleaner nozzle.

[0024] The invention also relates to a vacuum cleaner comprising a nozzle according to any one of the preceding embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various aspects of the present invention, including its particular features and advantages, can be readily understood from the following detailed description and accompanying drawings:

[0026] Figure 1 A top view of a vacuum cleaner nozzle according to the invention is shown.

[0027] Figure 2 Shows Figure 1 A bottom view of the vacuum cleaner nozzle is shown.

[0028] Figure 3Shows Figure 1 Cross-sectional view of the suction nozzle along the AA direction.

[0029] Figure 4 A vacuum cleaner according to an embodiment is shown. DETAILED DESCRIPTION

[0030] The disclosed invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, the present invention should not be construed as being limited to the embodiments described herein. In the following description, similar reference numerals are used to represent similar elements, parts, articles or features when applicable.

[0031] Figures 1 to 3 The figure shows an embodiment of a vacuum cleaner nozzle according to the present invention. The vacuum cleaner nozzle 1 comprises a nozzle housing 2, wheels 21 and a nozzle outlet 20. The nozzle outlet 20 is adapted to be connected to a suction hose of a vacuum cleaner (see Figure 4 ), so that when the vacuum cleaner is in the operating mode, air is sucked into the vacuum cleaner through the vacuum cleaner nozzle 1 via the hose, and a vacuum is formed under the nozzle. The operation of a common vacuum cleaner is well known to those skilled in the art, so it will not be described in detail here.

[0032] The vacuum cleaner nozzle 1 comprises a base plate 3. The base plate 3 is preferably a plastic part, which is formed by, for example, integral injection molding, a metal part, or a combination of plastic and metal. The base plate 3 has a suction opening 5. In the exemplary embodiment, the suction opening 5 is substantially rectangular and has a first longitudinal side 5.1 and a second longitudinal side 5.2. The first longitudinal side 5.1 and the second longitudinal side 5.2 are separated by a distance, which is hereinafter referred to as the suction opening width w.

[0033] During normal operation of the nozzle 1 , the soleplate 3 is arranged so that it faces the surface to be cleaned, typically a floor.

[0034] During normal operation of the suction nozzle 1, the longitudinal sides 5.1, 5.2 are perpendicular to the normal cleaning direction (CD), i.e. perpendicular to the movement of the suction nozzle 1 during vacuuming of a surface. Starting from the suction opening 5, an air duct 22 extends through the suction plate 2 to an outlet 20. The air duct 22 comprises a flexible tube 23 and a fixed tube 24. The fixed tube 24 ends at the outlet 20.

[0035] exist Figures 1 to 3, a vacuum cleaner nozzle (1) configured to move over a floor surface (30) is illustrated. The nozzle (1) comprises a base plate (3) which, during operation of the nozzle 1, is configured to face the floor surface (30). The base plate 3 comprises an elongated suction inlet 5. The base also comprises a front portion 6 and a rear portion 7, the front portion 6 being arranged in front of the suction inlet 5 and the rear portion being arranged behind the suction inlet 5. The front portion 6 comprises a front surface 12 which, during normal use, has a length L1 between 5 and 10 mm in a direction substantially parallel to the floor surface 30.

[0036] The front surface further comprises an inclined front surface 11 having a length L3 of between 20-26 millimeters in the same direction, which is a direction substantially parallel to the floor surface 30, during normal use.

[0037] The rear portion 7 comprises a rear surface 13 having a length L2 of between 5-10 mm in a direction substantially parallel to the floor surface 30 during normal use and an inclined rear surface 14 having a length L4 of between 18-24 mm in the same direction.

[0038] In the disclosed embodiment, the front inclined surface 11 has an inclination angle a1 between 7-11 degrees relative to the front surface 12. The rear inclined surface 14 has an inclination angle a2 between 8-12 degrees relative to the rear surface 13. The lengths and inclinations of the front and rear surfaces may be independent of each other.

[0039] exist Figures 1 to 3 In the invention, a nozzle is disclosed comprising a pair of wheels 21, which are arranged behind the rear portion 7 and preferably behind the nozzle housing 2. The invention also covers embodiments without wheels or with a different wheel arrangement, such as wheels in the base plate.

[0040] The nozzle comprises a housing 2 which is arranged above a nozzle base 3. The housing 2 comprises a suction channel which connects the suction inlet 5 to the nozzle outlet 20.

[0041] During normal use, the suction opening 5 has a length in a direction perpendicular to the advancing cleaning direction CD of between 250 and 290 mm, preferably between 265 and 275 mm, most preferably of 270 mm.

[0042] The suction opening has a width of between 15-30 mm, preferably between 20-25 mm, and most preferably 22 mm.

[0043] The front part of the front inclined surface 11 comprises a rounded portion 1) having a radius between 3-5 mm and is preferably designed to be arranged in front of the nozzle base.

[0044] During normal use, the front surface 12 has a length in a direction substantially parallel to the floor surface 30 of between 6-8 millimeters, and preferably around 7 millimeters.

[0045] During normal use, the rear surface 13 has a length in a direction substantially parallel to the floor surface 30 of between 6-8 millimeters, and preferably around 7 millimeters.

[0046] The inclined front surface 11 has a length in a direction perpendicular to the suction opening and parallel to the front surface of between 23 and 25 mm, preferably about 24 mm.

[0047] The inclined rear surface 14 has a length in a direction perpendicular to the suction opening and parallel to the rear surface of between 21 and 23 mm, preferably about 22 mm.

[0048] The front inclined surface 11 has an inclination angle a1 between 8 and 10 degrees, preferably around 9 degrees.

[0049] The rear inclined surface 14 has an inclination angle a2 between 9 and 11 degrees, preferably around 10 degrees.

[0050] exist Figures 1 to 3 In the embodiment, the base plate 3 is made into an integral type. The base plate can also be made into two or more pieces.

[0051] The nozzle in the shown embodiment is primarily a floor nozzle for cleaning floors or similar surfaces.

[0052] In an embodiment, to improve the movement of carpet fibers during the cleaning operation, the nozzle 1 comprises at least one groove 60, 70 extending parallel to the longitudinal sides 5.1, 5.2 of the suction opening 5. Preferably, the groove 60, 70 is formed on the bottom plate 3 by a recess close to the suction opening 5.

[0053] Figure 4 A vacuum cleaner 100 is illustrated, which includes a suction nozzle 1 according to any of the embodiments. The suction nozzle 1 may be connected to a main body 104 of the vacuum cleaner 100 via a tube 102 and a hose 103.

[0054] Above, embodiments of the vacuum cleaner nozzle according to the invention as defined in the appended claims have been described. These should be regarded as merely non-limiting examples.

[0055] It will be appreciated that those skilled in the art may make various significant modifications and / or improvements to the embodiments of the invention described in this specification without departing from the scope of the invention as defined in the accompanying claims.

[0056] Reference numerals list

[0057] 1: Nozzle

[0058] 2: Nozzle housing

[0059] 3: Bottom plate

[0060] 5: Suction port

[0061] 5.1: First longitudinal edge

[0062] 5.2: Second longitudinal edge

[0063] 6: Front part

[0064] 7: The back part

[0065] 11: Front inclined surface

[0066] 12: Front surface

[0067] 13: Back surface

[0068] 14: Rear inclined surface

[0069] 15: Arc part

[0070] 20: Air outlet

[0071] 21: Wheels

[0072] 22: Air duct

[0073] 23: Flexible pipe

[0074] 24: Fixed pipe

[0075] 30: Floor surface

[0076] 60: Slot

[0077] 70: Slot

[0078] 100: Vacuum cleaner

[0079] 102: Pipe

[0080] 103: Hose

[0081] CD: Cleaning Directions

[0082] w: Width of the suction port

[0083] a1: Angle between the front inclined surface and the front surface

[0084] a2: Angle between the rear inclined surface and the rear surface

Claims

1. A vacuum cleaner nozzle (1) configured to move over a floor surface (30), wherein the nozzle (1) comprises a base plate (3), during operation of the nozzle (1), the base plate (3) being configured to face the floor surface (30), - wherein the base plate (3) comprises an elongated suction opening (5), - a front portion (6) arranged in front of the suction opening (5), - a rear portion (7) arranged behind the suction opening (5), - wherein the front portion (6) comprises a front surface (12) and an inclined front surface (11), wherein during normal use, the front surface (12) has a length (L1) between 5 and 10 millimeters in a direction substantially parallel to the floor surface (30), and the inclined front surface (11) has a length (L3) between 20 and 26 millimeters in the same direction, and - wherein the rear portion (7) comprises a rear surface (13) and an inclined rear surface (14), wherein during normal use, the rear surface (13) has a length (L2) between 5 and 10 millimeters in a direction substantially parallel to the floor surface (30), and the inclined rear surface (14) has a length (L4) between 18 and 24 millimeters in the same direction, and - the front inclined surface (11) has an inclination angle (a1) between 7 and 11 degrees relative to the front surface (12), - The rear inclined surface (14) has an inclination angle (a2) between 8 and 12 degrees relative to the rear surface (13).

2. A vacuum cleaner nozzle according to claim 1, wherein the nozzle comprises a pair of wheels (21), which are arranged behind the rear part (7) and preferably behind the nozzle housing (2).

3. A vacuum cleaner nozzle according to any one of claims 1 to 2, wherein the nozzle comprises a shell (2), the shell (2) is arranged above the nozzle base (3), the shell (2) comprises an air suction channel, and the air suction channel connects the suction port (5) to the nozzle outlet (20).

4. A vacuum cleaner nozzle according to any one of claims 1 to 3, wherein during normal use, the suction opening (5) has a length in a direction perpendicular to the forward cleaning direction (CD) of between 250 and 290 mm, preferably between 265 and 275 mm, most preferably between 270 mm.

5. A vacuum cleaner nozzle according to any one of claims 1 to 4, wherein the suction opening has a width of between 15 and 30 mm, preferably between 20 and 25 mm, most preferably 22 mm.

6. A vacuum cleaner nozzle according to any one of claims 1 to 5, wherein the front part of the front inclined surface (11) comprises a rounded portion (15), the rounded portion (15) having a radius between 3-5 mm and preferably designed to be arranged at the front of the nozzle base.

7. A vacuum cleaner nozzle according to any one of claims 1 to 6, wherein during normal use, the front surface (12) has a length in a direction substantially parallel to the floor surface (30) of between 6 and 8 mm, and preferably of around 7 mm.

8. A vacuum cleaner nozzle according to any one of claims 1 to 7, wherein during normal use, the rear surface (13) has a length in a direction substantially parallel to the floor surface (30) of between 6 and 8 mm, and preferably of around 7 mm.

9. The vacuum cleaner nozzle according to any one of claims 1 to 8, wherein the inclined front surface (11) has a length in a direction perpendicular to the suction opening and parallel to the floor surface (30) between 23 and 25 mm, preferably around 24 mm.

10. A vacuum cleaner nozzle according to any one of claims 1 to 9, wherein the inclined rear surface (14) has a length in a direction perpendicular to the suction opening and parallel to the floor surface (30) of between 21 and 23 mm, preferably around 22 mm.

11. The vacuum cleaner nozzle according to any one of claims 1 to 10, wherein the front inclined surface (11) has an inclination angle (a1) between 8-10 degrees, preferably around 9 degrees.

12. The vacuum cleaner nozzle according to any one of claims 1 to 11, wherein the rear inclined surface (14) has an inclination angle (a2) between 9-11 degrees, preferably around 10 degrees.

13. The vacuum cleaner nozzle according to any one of claims 1 to 12, wherein the base plate (3) is made in one piece.

14. A vacuum cleaner nozzle according to any one of claims 1 to 13, wherein the nozzle is a floor nozzle.

15. A vacuum cleaner (100) comprising a vacuum cleaner nozzle (1, 1') according to any one of the preceding claims.

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