JP2023537118A - Handheld vacuum cleaner with removable filter - Google Patents

Abstract

A vacuum cleaner housing (2), a handle (3) connected to the vacuum cleaner housing (2), and an air inlet (4) through which air can be drawn by the handheld vacuum cleaner (1). ), at least one outlet (5) through which purified air can exit the hand-held vacuum cleaner (1), and between the inlet (4) and the outlet (5). an air flow circuit (6) extending to the air flow circuit; and a suction unit (7) attached to the air flow circuit, the suction unit (7) comprising an electric motor (7.1) and an electric motor (7.1). a fan (7.1) coupled to a suction unit (7) for generating an airflow in the airflow circuit (6) from the inlet (4) to the outlet (5); A waste separation device mounted in the air flow circuit (6) upstream of (7) and through which the air flow generated by the suction unit (7) passes when the hand-held vacuum cleaner (1) is operated. (8) and a removable tank (9) for receiving the waste separated by the waste separator (8), the removable tank (9) being removably attached to the vacuum cleaner housing. ) and a first wall (12.3) at least partially covering the suction unit (7). The suction unit casing (12) comprises a second wall (12.4) that at least partially covers the first wall (12.3). The second wall (12.4) extends at least partially between the first wall (12.3) and the second wall (12.4). ) is formed apart from the first wall (12.3) so as to define an internal space (15) of the first wall (12.3).

Description

The present invention is a vacuum cleaner for aspirating dust and small particle size waste present on surfaces to be cleaned, which may be, for example, tiles, parquet, plywood, carpets or rugs. related to the field of

Vacuum cleaners, more particularly handheld vacuum cleaners, are
- a vacuum cleaner housing;
- a handle connected to the vacuum cleaner housing;
an air intake through which air can be drawn by a handheld vacuum cleaner;
at least one exhaust port through which cleaned air may exit the handheld vacuum cleaner;
- an airflow circuit extending between the inlet and the outlet;
a suction unit mounted in the airflow circuit, the suction unit including an electric motor and a fan for generating an airflow in the airflow circuit from the inlet to the outlet;
- a waste separation device mounted in the airflow circuit upstream of the suction unit, through which the airflow generated by the suction unit passes when the hand-held vacuum cleaner is actuated;
- a suction unit casing which at least partially covers the suction unit. A suction unit casing is typically used to position and hold the suction unit on the handheld vacuum cleaner and to protect the suction unit.

"Waste separation device" refers to a separation device capable of separating waste and/or dust from an intake air stream, for example a filtration device using at least one filter medium or a cyclone device using at least one cyclone. do. In the following waste and/or dust will be referred to as "waste".

For this type of hand-held vacuum cleaner, the suction efficiency, the waste storage capacity in the removable tank, the miniaturization, and the weight reduction are important so that the hand-held vacuum cleaner can remain easy to handle. A compromise has been sought for several years.

In order to miniaturize the handheld vacuum cleaner and reduce its external dimensions, some manufacturers, for example, seek to reduce the thickness of the inner and outer walls of the handheld vacuum cleaner, while others Manufacturers seek to reduce the size of suction units. Reducing the thickness of the inner or outer wall of a hand-held vacuum cleaner generally comes at the expense of its robustness, thus reducing the overall life of hand-held vacuum cleaners that are more sensitive to impacts, for example. Decrease. Reducing the size of the suction unit without changing the motor technology is often accompanied by a reduction in suction power and suction performance.

SUMMARY OF THE INVENTION The present invention aims to remedy all or part of the aforementioned drawbacks.

The technical problem behind the present invention is, inter alia, a hand-held vacuum cleaner with improved lightness and compactness, without otherwise compromising the robustness of the appliance and the performance of the vacuum cleaner. to provide the machine.

To this end, the invention provides
- a vacuum cleaner housing;
- a handle connected to the vacuum cleaner housing;
an air intake through which air can be drawn by a handheld vacuum cleaner;
at least one exhaust port through which cleaned air may exit the handheld vacuum cleaner;
- an airflow circuit extending between an air inlet and an air outlet;
a suction unit mounted in the airflow circuit, the suction unit comprising an electric motor and a fan coupled to the electric motor for generating an airflow in the airflow circuit from the inlet to the outlet; and,
- a waste separation device mounted in the airflow circuit upstream of the suction unit, through which the airflow generated by the suction unit passes when the hand-held vacuum cleaner is actuated;
- a removable tank, removably attached to the vacuum cleaner housing, for receiving waste separated by the waste separation device;
- a suction unit casing comprising a first wall that at least partially covers the suction unit;

According to the invention, the suction unit casing comprises a second wall that at least partially covers the first wall. The second wall is spaced apart from the first wall and extends at least partially between the first wall and the second wall in an interior space of the handheld vacuum cleaner. define

The present invention makes it possible to provide an interior space within the handheld vacuum cleaner adjacent to the suction unit. This internal space is formed in the casing of the suction unit. In other words, the walls of the casing of the suction unit make it possible to provide a protective casing around the suction unit and define a functional internal space within the vacuum cleaner, i.e. the airflow duct. A portable vacuum to form or, for example, a noise attenuator or damper, an electronic board for controlling or operating a portable vacuum cleaner, or a filter that is part of an airflow circuit. Allows to create an interior space designed to accommodate the functional sub-assemblies of the vacuum cleaner.

Providing such an interior space that resides directly within the suction unit casing while being functional to the hand-held vacuum cleaner would not have been possible if such an interior space had not been incorporated into the suction unit casing. , allowing a reduction in the number of walls that would have been necessary to create a hand-held vacuum while maintaining instrument robustness and without altering the performance of the vacuum cleaner. To make a vacuum cleaner lighter and more compact.

Additionally, the handheld vacuum cleaner may have one or more of the following features, employed alone or in combination.

Advantageously, the first wall and the second wall of the suction unit casing are made in one piece. The first wall and the second wall are obtained, for example, by plastic injection molding.

This feature makes the suction unit casing easier to manufacture.

Advantageously, the electric motor comprises an output shaft having a rotation axis, the output shaft being coupled to the fan.

The first wall and the second wall are partially annular in shape about the axis of rotation. The first wall and the second wall thus define a partially annular interior space around the suction unit. With this configuration, the interior space does not extend all the way around the suction unit. For example, the interior space could have a "C" shape extending partially around the suction unit. To meet the needs of a particular vacuum cleaner configuration, the "C" shaped interior space facilitates providing through channels, for example, for electrical wires or air ducts that do not pass through the interior space. This arrangement thus allows optimizing the interior space in the presence of constraints such as, for example, through-channels of wires or ducts that cannot pass through the interior space.

Advantageously, the first wall and the second wall are of annular shape, eg tubular or frustoconical, substantially coaxial with the axis of rotation. The first wall and the second wall thus at least partially define an annular interior space extending around the suction unit.

This configuration allows optimizing the internal space extending around the suction unit. Large functional subassemblies such as, for example, dust filters can be placed in this annular interior space while limiting their impact on the outer diameter of the hand-held vacuum cleaner.

Advantageously, the first wall and the second wall are connected by at least one connecting wall. The first wall, the second wall and the connecting wall are made in one piece, preferably in one piece obtained by plastic injection molding. This configuration facilitates manufacturing the suction unit casing.

Advantageously, the connecting wall extends radially with respect to the rotation axis of the electric motor between the first wall and the second wall.

Advantageously, the connecting wall is in the form of an annular disc.

In an alternative embodiment the first wall and the second wall are connected by a connecting arm. In this case, the first wall, the second wall and the connecting arm are advantageously made in one piece, preferably in a single piece obtained by plastic injection moulding.

Advantageously, the suction unit casing comprises an access opening for accessing the interior space. The connecting wall is preferably formed on the side of the suction unit casing opposite the access opening.

The access opening allows easy insertion or removal of removable subassemblies of the vacuum cleaner, such as removable filters. The access opening also makes it easier to remove the suction unit casing from the mold, thus making it easier to manufacture, especially if it is obtained in one piece by plastic injection molding. .

Advantageously, the interior space formed between the first wall and the second wall forms a chamber or duct located on the airflow circuit. Airflow generated by the suction unit passes through the chamber or duct when the handheld vacuum cleaner is activated. If the interior space forms a duct, this is typically an air flow duct for conveying air within the handheld vacuum cleaner. When the interior space forms a chamber, this chamber is for housing functional subassemblies of the handheld vacuum cleaner, such as filters, noise attenuators or dampers, which form part of the airflow circuit. can be used. The defined interior space can thus create or receive the essential configuration for a handheld vacuum cleaner.

Advantageously, the interior space extending between the first wall and the second wall forms a filter chamber in which a filter, preferably a removable filter, is arranged, the filter chamber and the filter comprising: Arranged in the airflow circuit, through which the airflow generated by the suction unit passes when the hand-held vacuum cleaner is activated. The filter chamber and filter are arranged in the airflow circuit downstream of the suction unit.

The interior space is also designed to receive a filter that is part of the upstream part of the airflow circuit, i.e. upstream of the suction unit, but the interior space may be formed next to or around the suction unit. If this interior space is used as a filter chamber and the removable filter is part of the downstream part of the airflow circuit, i.e. part of the airflow circuit downstream of the suction unit, the pressure loss and overall size From a point of view, it allows to further optimize the airflow circuit.

Advantageously, the filter chamber is at least partially defined by the first wall, the second wall and the connecting wall. The access opening allows filters to be installed or removed.

Advantageously, the filter chamber and filter have an annular shape extending around the suction unit.

Advantageously, the filter chamber comprises at least one air inlet formed in the connecting wall. The air inlet of the filter chamber is in pneumatic communication with the air outlet of the suction unit, the filter chamber having at least one air outlet formed in the second wall.

Advantageously, the first wall has no openings.

Advantageously, at least part of the second wall forms at least one wall of the vacuum cleaner housing.

This configuration makes it possible to define an interior space between walls that are already present in conventional vacuum cleaners. Thus, the interior space can be formed with fewer walls than in a conventional vacuum cleaner, making the handheld vacuum cleaner even lighter and more compact. This arrangement also allows maximizing the internal space between the protective casing of the suction unit and the vacuum cleaner housing. Furthermore, since the first wall and the second wall are part of the same single piece part, forming an internal space between the protective casing of the suction unit and the vacuum cleaner housing is Doesn't change the robustness of the handheld vacuum cleaner in this location.

When the second wall forms the wall of the vacuum cleaner housing, the at least one air outlet is an exhaust outlet. This arrangement limits the number of ducts in the handheld vacuum cleaner and makes it possible to simplify it.

Advantageously, the second wall of the suction unit casing is arranged between the removable tank and the rear part of the vacuum cleaner housing in a direction parallel to the axis of rotation of the motor.

Advantageously, the access opening providing access to the interior space faces the removable tank.

According to this configuration of the invention, when the removable tank is removed from the vacuum cleaner housing, functional subassemblies of the cleaner, such as the removable filter, are easily accessible from the interior space through the access opening. can be removed at When the removable tank is attached to the vacuum cleaner housing, the removable filter is rendered inaccessible and cannot be removed from the interior space through the access opening.

Advantageously, the separating device is housed in a removable tank, so that the separating device can be separated from the vacuum cleaner housing together with the removable tank.

This construction allows removal of the separation device with the removable tank, after which it is easy to remove and clean.

Advantageously, the removable tank is removably attached to the vacuum cleaner housing and contacts the vacuum cleaner housing via a contact surface formed on the vacuum cleaner housing.

Advantageously, the contact surface is substantially annular and the interior space and the access opening are radially formed within the substantially annular contact surface.

Advantageously, the contact surface is formed by a substantially annular axial end of the second wall of the suction unit casing.

A substantially annular contact surface can easily be achieved at the second wall of the suction unit casing so that when the tank is attached to the vacuum cleaner housing, the removable tank is evenly spaced with the vacuum cleaner housing. allow contact. Even contact of the removable tank with the vacuum cleaner housing facilitates achieving a tight seal in this contact area.

The removable tank may be attached in various ways, in particular by a snap-on joint with at least one notch and locking latch, by a bayonet-type joint, by a threaded joint, or by any other means known to those skilled in the art. It can be attached to the vacuum cleaner housing.

Advantageously, the waste separation device is a cyclone separator having a main shaft coaxial with the rotation axis of the electric motor output shaft.

The following description highlights the features and advantages of the invention. This description is based on the following drawings.

1 is a general view of a handheld vacuum cleaner, according to certain embodiments; FIG. 2 is an illustration of the handheld vacuum cleaner of FIG. 1 in longitudinal section; FIG. Fig. 2 is a view of the handheld vacuum cleaner of Fig. 1 in three-quarter front perspective view, excluding the removable tank and separating device; Figure 4 is a partial cross-sectional view of the rear portion of the handheld vacuum cleaner of Figure 3; 2 is an illustration of the handheld vacuum cleaner of FIG. 1, in three-quarter front perspective view, with the removable filter partially removed from the filter chamber, except for the removable tank and separation device; FIG. . Figure 6 is a partial cross-sectional view of the rear portion of the handheld vacuum cleaner of Figure 5; Figure 2 is a three-quarter front perspective view of the hand-held vacuum cleaner of Figure 1 with the removable filter completely removed from the filter chamber, except for the removable tank, separating device; Figure 8 is a partial cross-sectional view of the rear portion of the handheld vacuum cleaner of Figure 7; 2 is an illustration of the suction unit casing of the handheld vacuum cleaner of FIG. 1, in three-quarter front perspective view; FIG. 2 is a view of the suction unit casing in FIG. 1 through a longitudinal section; FIG.

In the remainder of this specification, the handheld vacuum cleaner will be referred to as a vacuum cleaner.

1-10 show a vacuum cleaner housing 2, a handle 3 connected to the vacuum cleaner housing 2, an air inlet 4 through which air can be drawn by the vacuum cleaner 1, and a cleaning device. 1 shows a vacuum cleaner 1 comprising a plurality of air outlets 5 through which compressed air can exit the vacuum cleaner 1. FIG. Vacuum cleaner 1 further comprises an air flow circuit 6 extending between inlet 4 and outlet 5 . The vacuum cleaner 1 comprises a suction unit 7 attached to an airflow circuit 6 . The suction unit 7 includes an electric motor 7.1 and a fan 7.2 (FIGS. 2 and 3) coupled to the electric motor 7.1 to generate an airflow in the airflow circuit 6 from the inlet 4 to the outlet 5. 4). The handle 3 may be manufactured integrally with the vacuum cleaner housing 2 or may be attached to the vacuum cleaner housing 2 .

The vacuum cleaner 1 also comprises a waste separation device 8 mounted in the air flow circuit 6 in the upstream part 6.1 of the suction unit 7. As shown in FIG. The airflow generated by the suction unit 7 passes through the waste separation device 8 when the vacuum cleaner 1 is activated. The vacuum cleaner 1 has a removable tank, also called waste storage container, removably attached to the vacuum cleaner housing 2 for receiving and accumulating the waste separated by the waste separation device 8. 9. The waste separation device 8 is advantageously arranged in a removable tank 9 . In this case the removable tank 9 forms a separation chamber. Preferably, the waste separation device 8 is removable to facilitate emptying of the contents of the removable tank 9 when the removable tank 9 is removed from the vacuum cleaner housing 2. can be removed from the tank 9. The air intake 4 is connected by an air intake duct 4.1 (shown in FIG. 2) to a separate chamber corresponding to the interior of the removable tank 9.

The vacuum cleaner 1 preferably comprises a battery pack 10 at the bottom of the vacuum cleaner. The bottom surface 10.1 of the battery pack 10 allows the vacuum cleaner 1 to rest on a horizontal surface when it is not in use (see Figure 2). The handle 3 extends between the battery pack 10 and the vacuum cleaner housing 2, advantageously to the rear 13 of the vacuum cleaner.

The vacuum cleaner 1 comprises a switch 11 for operating the vacuum cleaner, the switch 11 controlling the operation of the suction unit 7, in particular when switched on by the user.

The electric motor 7.1 comprises an output shaft 7.3 (shown in Figures 2, 4, 6, 8) with an axis of rotation X. The output shaft 7.3 is coupled to the fan 7.2.

Advantageously, and as shown in Figures 1-10, the separating device 8, the fan 7.2 and the electric motor 7.1 are aligned. More specifically, the waste separation device 8, the fan 7.2 and the electric motor 7.1 are aligned and centered on the rotation axis X of the electric motor 7.1. In this configuration, the axis of rotation X is the main axis of the vacuum cleaner 1 .

The suction unit 7 is arranged at the rear 13 of the vacuum cleaner 1 and the waste separation device 8 is arranged at the front of the suction unit 7 . 4 and 6 show the rear part 13 of the vacuum cleaner 1. FIG. In the illustrated embodiment, the air intake 4 of the vacuum cleaner 1 forms the front end of the handheld vacuum cleaner 1 . This air intake 4 advantageously projects forward from the rest of the hand-held vacuum cleaner 1 , in particular with respect to the removable tank 9 .

The vacuum cleaner 1 further comprises a suction unit casing 12 which at least partially covers the suction unit 7 . More specifically, the suction unit casing 12 comprises a first wall 12.3 that at least partially covers the suction unit 7. As shown in FIG.

The suction unit casing 12 can be seen in FIGS. 2-10, more specifically in FIGS. 9 and 10. FIG. The suction unit casing 12 is used in particular to position and hold the suction unit 7 within the vacuum cleaner 1 and to protect the suction unit 7 .

As shown, the suction unit 7 may comprise an intermediate casing 7.4 arranged radially inside the suction unit casing 12 with respect to the rotation axis X of the electric motor 7.1.

The suction unit casing 12 is in pneumatic communication with the suction unit 7 and comprises an air inlet 12.1 and an air outlet 12.2 arranged on both sides of the suction unit 7 in the direction of the rotation axis X. The air inlet 12.1 communicates with the upstream portion 6.1 of the air flow circuit 6 and the air outlet 12.2 communicates with the downstream portion of the air flow circuit 6. In other words, the upstream part 6.1 of the airflow circuit 6 is arranged upstream of the suction unit 7 and extends between the air intake 4 and the suction unit 7. As shown in FIG. A downstream part 6 . 2 of the air flow circuit 6 is arranged downstream of the suction unit 7 and extends between the suction unit 7 and the outlet 5 .

The separating device 8 is arranged upstream 6.1 of the air flow circuit 6. As shown in FIG.

In the embodiment shown in Figures 1-10, the separating device 8 is advantageously a cyclonic separator having a main axis coaxial with the rotation axis X of the output shaft of the electric motor. In an alternative embodiment, not shown, and without departing from the scope of the invention, the separation device comprises porous filter media for passing air and preventing waste from passing therethrough. , could be made with a filter.

In order to limit the amount of dust sucked into the suction unit 7, a vacuum cleaner is placed in addition to the waste separation device 8 in the airflow circuit between the waste separation device 8 and the suction unit 7, An upstream filter 13 may be provided. This upstream filter 13 is preferably removable, frusto-conical and housed in the central part of the cyclonic separator.

In order to limit or prevent dust from escaping through the air outlet 5, the vacuum cleaner 1 preferably includes, in addition to the waste separation device 8, a downstream side A filter 14 is provided.

As shown more particularly in Figures 4, 6, 8, 9 and 10, the suction unit casing 12 has a second wall which at least partially covers the first wall 12.3. Section 12.4. The second wall 12.4 at least partially defines an interior space 15 within the handheld vacuum cleaner 1 extending between the first wall 12.3 and the second wall 12.4. To define it, it is formed at a distance from the first wall 12.3.

The first wall 12.3 and the second wall 12.4 are advantageously annular in shape coaxial with the axis of rotation X of the output shaft 7.3 of the electric motor 7.1. The first wall 12.3 and the second wall 12.4 at least partially define an annular interior space 15 extending around the suction unit 7. As shown in FIG. In the embodiment shown in the figures, the first wall 12.3 and the second wall 12.4 are more particularly of tubular shape. In an alternative embodiment not shown, the first wall and the second wall could be substantially frusto-conical.

In another alternative embodiment not shown, the first wall and the second wall are partially annular in shape about the axis of rotation of the electric motor, and the first wall and the second wall defines a partially annular interior space around the suction unit. According to this alternative, the interior space could for example have the shape of a part of a ring or a part with a "C" shape (non-closed ring).

According to the illustrated embodiment, the first wall 12.3 and the second wall 12.4 are joined by a connecting wall 12.5. As shown in Figures 9 and 10, the first wall 12.3, the second wall 12.4 and the connecting wall 12.5 are advantageously made in one piece, preferably plastic injection molded. made of a single piece obtained by Advantageously, the connecting wall 12.5 extends radially with respect to the axis of rotation X of the electric motor 7.1, the connecting wall 12.5 connecting the first wall 12.3 and the second wall 12.3. extends between wall 12.4. As shown in Figures 9 and 10, the connecting wall 12.5 is in the form of an annular disc. In one alternative mentioned above, in which the first wall and the second wall are partly annular about the axis of rotation of the electric motor, the connecting wall need not necessarily be annular, e.g. or a substantially rectangular or frusto-conical shape, or a "C" shape.

In another alternative embodiment (not shown), the first wall and the second wall are connected by a connecting arm extending radially between the first wall and the second wall. would get. According to this alternative, the first wall 12.3, the second wall 12.4 and the connecting arm are advantageously made in one piece, preferably in a single piece obtained by plastic injection moulding. would be

According to the illustrated embodiment, the suction unit casing 12 comprises an access opening 12.6 for accessing the interior space 15. As shown in FIG. A connecting wall 12.5 is formed on the side of the suction unit casing 12 opposite the access opening 12.6. The interior space 15 is thus defined by the walls 12.3, 12.4 and 12.5 of the suction unit casing 12 which, on a half-section, for example in FIG. 10, form substantially a "U" shape. defined. This U-shape is shown in dashed lines in FIG. 10 and referenced as 15.1. The access opening 12.6 faces the removable tank 9.

According to the illustrated embodiment, the interior space 15 forms a filter chamber in which the filter is arranged. The filter chamber and filter are arranged in an airflow circuit 6 through which the airflow generated by the suction unit 7 passes when the vacuum cleaner 1 is operated.

In the illustrated embodiment, the filter chamber 15 is arranged in the downstream portion 6.2 of the air flow circuit 6, the filter being the downstream filter 14 previously described.

In the illustrated embodiment, the filter chamber 15 and the downstream filter 14 are annular in shape and extend around the suction unit 7 .

The downstream filter 14 is preferably removable and the access opening 12.6 allows the filter 14 to be inserted into the filter chamber when the removable tank 9 is removed from the vacuum cleaner housing 2; Alternatively, it allows the filter 14 to be removed.

Figures 1 and 2 show the vacuum cleaner 1 in its operational state, i.e. with the removable filter 14 in place in the filter chamber and the removable tank 9 mounted in the vacuum cleaner housing 2. shows a vacuum cleaner 1 of. 3 through 8 show three successive steps in the removal of downstream filter 14 until complete removal of downstream filter 14. FIG.

Indeed, Figures 3 and 4 show the vacuum cleaner 1 in a first removal step, with the removable tank 9 removed and the downstream filter 14 still in place within the filter chamber. . Figures 5 and 6 show the vacuum cleaner in a second removal step, in which the downstream filter 14 has been partially removed from the filter chamber following translational movement of the removable filter along the major axis X. indicates Figures 7 and 8 show the vacuum cleaner in a third removal step, with the downstream filter 14 completely removed from the filter chamber.

In alternative embodiments not shown, the interior space is replaced by an upstream filter (part of the upstream part 6.1 of the airflow circuit 6) instead of a downstream filter, or a noise attenuator or damper, for example a handheld Other functional subassemblies of the handheld vacuum cleaner may be received, such as electronic boards for controlling or operating the vacuum cleaner. Also, the interior space could be used to define air ducts.

The filter chamber formed by the interior space 15 comprises at least one air inlet 12.7 formed in the connecting wall 12.5. Advantageously, a plurality of air inlets 12.7 are formed in the connecting wall 12.5, as shown in FIG. Air inlet 12.7 is in pneumatic communication with air outlet 12.2 and suction unit 7 . The filter chamber comprises at least one air outlet formed in the second wall 12.4. Advantageously, the filter chamber comprises a plurality of air outlets formed in the second wall 12.4.

The first wall 12.3 advantageously has no openings.

In the embodiment shown in the figures, the two parts of the second wall 12.4 form the two walls 2.1 and 2.2 of the vacuum cleaner housing 2 and the second wall 12.4. Air outlets formed in 4 form air outlets 5, which in this embodiment are formed in the walls 2.1 and 2.2. The walls 2.1 , 2.2 are arranged symmetrically on both sides of the vacuum cleaner 1 .

A second wall 12.4, which forms the walls 2.1 and 2.2 of the vacuum cleaner housing 2, extends parallel to the axis of rotation A of the electric motor 7.1 with the removable tank 9. It is arranged between the rear part 2.3 of the vacuum cleaner housing 2;

In the illustrated embodiment, the removable tank 9 is connected via a contact surface 12.8 formed by a substantially annular axial end of the second wall 12.4 of the suction unit casing 12. It is removably attached to the vacuum cleaner housing 2 .

A removable tank 9 is reversibly attached to the vacuum cleaner housing 2 . The removable tank 9 can be attached in various ways, in particular by a snap-on joint, by a bayonet-type joint, by a threaded joint or, for example, by at least one notch 19 and a locking latch 20 as shown in FIG. , can be attached to the vacuum cleaner housing 2 .

Of course, the present invention is in no way limited to the described and illustrated embodiments, as this embodiment is provided only as an example. Changes may still be made, particularly as regards the construction of the various elements or by substituting technical equivalents, without departing from the scope of protection of the invention.

Claims (16)

A handheld vacuum cleaner (1), comprising:
a vacuum cleaner housing (2);
a handle (3) connected to the vacuum cleaner housing (2);
an air intake (4) through which air can be drawn by the handheld vacuum cleaner (1);
at least one exhaust port (5) through which cleaned air can exit said handheld vacuum cleaner (1);
an air flow circuit (6) extending between said inlet (4) and said outlet (5);
A suction unit (7) mounted in said airflow circuit, said suction unit (7) being coupled to an electric motor (7.1) and said electric motor (7.1) and said air inlet. said suction unit (7) comprising a fan (7.2) for generating an airflow in said airflow circuit (6) from (4) to said outlet (5);
Upstream of said suction unit (7), attached to said air flow circuit (6) and through it generated by said suction unit (7) when said hand-held vacuum cleaner (1) is operated. a waste separation device (8) through which the separated air stream passes;
a removable tank (9) for receiving waste separated by said waste separation device (8), said tank (9) being removably attached to said vacuum cleaner housing;
a suction unit casing (12) comprising a first wall (12.3) at least partially covering said suction unit (7);
said suction unit casing (12) comprises a second wall (12.4) at least partially covering said first wall (12.3);
Said handheld, wherein said second wall (12.4) extends at least partially between said first wall (12.3) and said second wall (12.4) formed apart from said first wall (12.3) so as to define an interior space (15) of the vacuum cleaner (1);
Said electric motor (7.1) comprises an output shaft (7.3) having an axis of rotation (X), said output shaft (7.3) being coupled to said fan (7.2) and said first One wall (12.3) and said second wall (12.4) are of partially annular shape around said axis of rotation (X) and said first wall (12. 3) and said second wall (12.4) define an interior space (15) which is partially annular around said suction unit (7) (1). Hand-held vacuum cleaner (1) according to claim 1, characterized in that said first wall (12.3) and second wall (12.4) are manufactured in one piece. Hand-held vacuum cleaner (1). 3. Hand-held vacuum cleaner (1) according to claim 1 or 2, wherein said electric motor (7.1) comprises an output shaft (7.3) having an axis of rotation (X), said output shaft (7.3) is coupled to said fan (7.2), said first wall (12.3) and said second wall (12.4) being connected to said axis of rotation (X). substantially coaxial annular, e.g. tubular or frusto-conical, said first wall (12.3) and said second wall (12.4) at least partially A handheld vacuum cleaner (1) characterized by defining an annular interior space (15) extending around (7). A handheld vacuum cleaner (1) according to any one of claims 1-3, wherein said first wall (12.3) and said second wall (12.4) are characterized by: connected by at least one connecting wall (12.5), said first wall (12.3), said second wall (12.4) and said connecting wall (12.5) comprising: Hand-held vacuum cleaner (1) characterized in that it is made in one piece, preferably in one piece obtained by plastic injection moulding. Hand-held vacuum cleaner (1) according to claim 4, wherein said connecting wall (12.5) comprises said first wall (12.3) and said second wall (12.3). 4), extending radially with respect to said axis of rotation of said electric motor. 5. Hand-held vacuum cleaner (1) according to claim 4, characterized in that said connecting wall (12.5) is in the form of an annular disc. A handheld vacuum cleaner (1) according to any one of claims 1-3, wherein said first wall (12.3) and said second wall (12.4) are characterized by: connected by a connecting arm, said first wall (12.3), said second wall (12.4) and said connecting arm being integrally obtained, preferably by plastic injection moulding. A handheld vacuum cleaner (1) characterized in that it is made in one piece. A handheld vacuum cleaner (1) according to any one of claims 1-7, wherein said suction unit casing (12) comprises an access opening (12) for accessing said interior space (15). .6), wherein a connecting wall (12.5) is preferably formed on the side of said suction unit casing (12) opposite said access opening (12.6) A handheld vacuum cleaner (1) characterized by: A handheld vacuum cleaner (1) according to any one of claims 1-8, wherein said interior space (15) is located above said air flow circuit (6) and said handheld vacuum cleaner A handheld vacuum cleaner (1), characterized in that it forms a chamber or duct through which the air flow generated by said suction unit (7) passes when the machine (1) is operated. A handheld vacuum cleaner (1) according to any one of claims 1-9, wherein said interior space (15) forms a filter chamber in which a filter (14) is arranged, said filter chamber and said filter (14) is arranged in said airflow circuit (6) such that when the hand-held vacuum cleaner (1) is operated, the airflow generated by said suction unit (7) A handheld vacuum cleaner (1) characterized by passing through a filter chamber and said filter (14). A handheld vacuum cleaner (1) according to claim 10, wherein said filter chamber and said filter (14) are arranged in said air flow circuit (6) downstream of said suction unit (7). A handheld vacuum cleaner (1) characterized by: 12. Hand-held vacuum cleaner (1) according to claim 10 or 11, depending on claim 4 or 8, wherein said filter chamber comprises, at least in part, said first wall (12.3), An access opening (12.6) delimited by said second wall (12.4) and said connecting wall (12.5) allows said filter (14) to be inserted or removed. A handheld vacuum cleaner (1) characterized by: A handheld vacuum cleaner (1) according to any one of claims 10-12, wherein said filter chamber and said filter (14) are of annular shape and around said suction unit (7) A handheld vacuum cleaner (1), characterized in that it extends. 13. Hand-held vacuum cleaner (1) according to claim 12, wherein the filter chamber comprises at least one air inlet (12.7) formed in the connecting wall, the air inlet of the filter chamber is in gaseous communication with an air outlet in said suction unit (7), said filter chamber comprising at least one air outlet formed in said second wall (12.4). A handheld vacuum cleaner (1) characterized by: Hand-held vacuum cleaner (1) according to any one of claims 1-14, wherein at least part of said second wall (12.4) comprises said vacuum cleaner housing (2) A hand-held vacuum cleaner (1), characterized in that it forms at least one wall (2.1, 2.2) of a. Hand held vacuum cleaner (1) according to claim 14 or 15, characterized in that at least one air outlet of the filter chamber is at least one air outlet (5). (1).

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