ES2952232T3 - Portable vacuum cleaner equipped with a removable filter - Google Patents

Abstract

Portable vacuum cleaner (1) comprising a vacuum cleaner housing (2), a grip handle (3) connected to the vacuum cleaner housing (2), a suction inlet (4) through which the vacuum cleaner housing can suck air (2). portable vacuum cleaner (1), at least one exhaust hole (5) through which clean air can exit the portable vacuum cleaner (1), an aeraulic circuit (6) extending between the suction inlet (4) and the exhaust port (5), a suction unit (7) arranged on the aeraulic circuit, the suction unit (7) comprising an electric motor (7.1) and a fan (7.2) coupled to the electric motor (7.1) to generate an air flow in the aeraulic circuit (6) from the suction inlet (4) to the exhaust hole (5), a waste separation device (8) arranged in the aeraulic circuit (6) upstream of the aspirator ( 7) and which is crossed by an air flow generated by the suction unit (7) when the portable vacuum cleaner (1) is in operation, a removable container (9) intended to receive the waste separated by the waste separation device (8) and which is removably attached to the vacuum cleaner housing, a suction unit housing (12) comprising a first wall (12.3) that at least partially covers the suction unit (7). The suction unit housing (12) comprises a second wall (12.4) that at least partially covers the first wall (12.3). The second wall (12.4) is formed at a distance from the first wall (12.3) to delimit, at least in part, an internal space (15) of the portable vacuum cleaner (1) that extends between the first wall (12.3) and the second wall (12.4). (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Portable vacuum cleaner equipped with a removable filter

Technical scope

The present invention concerns the field of vacuum cleaners that allow dust and low-granulometry residue present on a surface to be cleaned, which can be, for example, tiles, parquet, laminate, carpet or a rug.

State of the art

A vacuum cleaner, and more particularly a portable vacuum cleaner, comprises in a known manner:

❖ a vacuum cleaner housing,

❖ a grab handle attached to the vacuum cleaner housing,

❖ a suction inlet through which the portable vacuum cleaner can suck in air,

❖ at least one exhaust hole through which clean air can escape from the portable vacuum cleaner,

❖ an aeraulic circuit that extends between the intake inlet and the exhaust orifice,

❖ a suction unit arranged in the aeraulic circuit, the suction unit comprising an electric motor and a fan to generate an air flow in the aeraulic circuit from the suction inlet to the exhaust orifice,

❖ a waste separation device arranged in the aeraulic circuit upstream of the suction unit and which is crossed by an air flow generated by the suction unit when the portable vacuum cleaner is in operation,

❖ a suction unit casing that at least partially covers the suction unit. A suction unit housing generally serves to position and secure the suction unit in the portable vacuum cleaner and also serves to protect the suction unit.

By waste separation device, reference is made to a separation device, for example, of the filter type that uses at least one filter medium or of the cyclone type that uses at least one cyclone, which is capable of separating waste and/or dust. of the aspirated air flow. Residues and/or dust are referred to below as residues. Document US 2018/110384 A1 describes a portable vacuum cleaner according to the preamble of claim 1.

For this type of portable vacuum cleaner, a compromise between suction efficiency, waste storage capacity in the removable bowl, compactness and lightness has been sought for several years so that the portable vacuum cleaner can remain manageable.

To reduce the mass of portable vacuum cleaners and reduce their external size, some manufacturers have sought, for example, to reduce the thicknesses of the internal and external walls of portable vacuum cleaners while others have sought to reduce the mass of the vacuum unit. Reducing the thickness of the internal or external walls of portable vacuum cleaners is generally done to the detriment of their robustness, overall reducing the service life of portable vacuum cleaners, which are more sensitive, for example, to shocks. Reducing the mass of the suction units without changing the engine technology is usually accompanied by a decrease in suction power and a decrease in suction performance.

Summary of the invention

The present invention aims to remedy all or part of the aforementioned drawbacks.

The technical problem that gives rise to the invention consists in particular of providing a portable vacuum cleaner that is lighter and more compact without, on the other hand, altering the robustness of the device and the performance of the vacuum cleaner. To this end, the present invention concerns a portable vacuum cleaner that comprises:

❖ a vacuum cleaner housing,

❖ a grab handle attached to the vacuum cleaner housing,

❖ a suction inlet through which the portable vacuum cleaner can suck in air,

❖ at least one exhaust hole through which clean air can escape from the portable vacuum cleaner,

❖ an aeraulic circuit that extends between the intake inlet and the exhaust orifice,

❖ a suction unit arranged in the aeraulic circuit, the suction unit comprising an electric motor and a fan coupled to the electric motor to generate an air flow in the aeraulic circuit from the suction inlet to the exhaust orifice,

❖ a waste separation device arranged in the aeraulic circuit upstream of the suction unit and which is crossed by an air flow generated by the suction unit when the portable vacuum cleaner is in operation,

❖ a removable bowl intended to receive the waste separated by the waste separation device and which is removably attached to the housing of the vacuum cleaner,

❖ a suction unit casing comprising a first wall that at least partially covers the suction unit.

According to the present invention, the casing of the suction unit comprises a second wall that at least partially covers the first wall. The second wall is formed at a distance from the first wall to delimit, at least in part, an internal space in the portable vacuum cleaner that extends between the first wall and the second wall.

The present invention makes it possible to have an internal space in the portable vacuum cleaner that adjoins the suction unit. This internal space is formed in the suction unit crankcase. In other words, the walls of the suction unit casing allow both to form a protective casing around the suction unit and to create an internal space in the portable vacuum cleaner that is functional for the vacuum cleaner, that is, an internal space that It is intended to form an aeraulic duct or to receive a functional sub-assembly of the portable vacuum cleaner such as, for example, a noise attenuator or absorber, an electronic control or command card of the portable vacuum cleaner or a filter that is part of the aeraulic circuit, etc. .

The formation of such an internal space directly in the crankcase of the suction unit that is functional for the portable vacuum cleaner makes it possible to reduce the number of walls that would have been necessary for the creation of such an internal space not integrated into the crankcase of the suction unit and Finally, it allows the portable vacuum cleaner to be made lighter and more compact while preserving the robustness of the device and without altering the performance of the vacuum cleaner.

The portable vacuum cleaner may also have one or more of the following characteristics, taken alone or in combination.

Advantageously, the first wall and the second wall of the suction unit casing are obtained by manufacturing in a single piece. The first wall and the second wall are obtained, for example, by pressure injection of plastic material.

This feature has the effect of simplifying the manufacturing of the suction unit crankcase.

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

The first wall and the second wall are partially annular in shape around the axis of rotation. The first wall and the second wall then delimit a partially annular internal space around the suction unit. According to this configuration, the internal space does not extend all around the suction unit. The internal space could have, for example, a "C" shape that partially extends around the suction unit. For the needs of certain vacuum cleaner configurations, a "C"-shaped internal space allows, for example, to more easily have electrical cable passages or aeraulic duct passages that do not pass into the internal space. This configuration therefore allows the internal space to be optimized in the presence of limitations such as, for example, electrical cable passages or aeraulic duct passages that cannot pass into the internal space.

Advantageously, the first wall and the second wall are of annular shape, for example, tubular or truncated conical, substantially coaxial with the axis of rotation. The first wall and the second wall then delimit, at least in part, an annular internal space that extends around the suction unit.

This configuration allows you to optimize the internal space that extends all around the suction unit. It is possible, for example, to place in this annular internal space a large functional subassembly such as a dust filter while limiting the impact on the external diameter of the portable vacuum cleaner.

Advantageously, the first wall and the second wall are joined by at least one connecting wall, the first wall, the second wall and the connecting wall are made in a single piece, preferably in a single piece obtained by plastic injection. Thanks to this configuration, the suction unit crankcase is easy to manufacture.

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

Advantageously, the connecting wall has the shape of an annular disc.

In a variant embodiment, the first wall and the second wall are joined by connecting arms. In this case, the first wall, the second wall and the connecting arms are advantageously made in a single piece, preferably in a single piece obtained by plastic injection.

Advantageously, the suction unit casing comprises an access opening to access the internal space. The connecting wall is preferably formed on a side of the suction unit casing that is opposite to the access opening.

The access opening allows you to easily insert or remove a removable subassembly of the vacuum cleaner, such as a removable filter. The access opening also allows for easier demolding and therefore easier manufacturing of the suction unit casing, particularly when it is obtained by injection of pressure plastic in a single piece.

Advantageously, the internal space formed between the first wall and the second wall forms a chamber or a duct located in the aeraulic circuit. The chamber or duct is crossed by an air flow generated by the suction unit when the portable vacuum cleaner is in operation. When the internal space forms a duct, the latter is typically an aeraulic duct that allows air to be transported in the portable vacuum cleaner. When the internal space forms a chamber, this can serve to house a functional subset of the portable vacuum cleaner such as, for example, a filter, attenuator or noise absorber that is part of the aeraulic circuit. The defined internal space can therefore perform or receive essential functions for the portable vacuum cleaner.

Advantageously, the internal space that extends between the first wall and the second wall forms a filtration chamber in which a filter, preferably removable, is placed, the filtration chamber and the filter being arranged in the aeraulic circuit and being crossed by a air flow generated by the vacuum unit when the portable vacuum cleaner is in operation. The filtration chamber and the filter are arranged in the aeraulic circuit downstream of the suction unit.

Although the internal space is also adapted to receive a filter belonging to an upstream part of the aeraulic circuit, that is, upstream of the suction unit, the fact that the internal space is formed next to or around the suction unit allows further optimization of the aeraulic circuit in terms of pressure losses and overall size when this internal space is used for a filtration chamber and a removable filter that belong to the downstream part of the aeraulic circuit, i.e. the aeraulic circuit part which is located downstream of the suction unit.

Advantageously, the filtration chamber is at least partially delimited by the first wall, the second wall and the connecting wall. The access opening allows placement or removal of the filter.

Advantageously, the filtration chamber and the filter have an annular shape that extends around the suction unit.

Advantageously, the filtration chamber comprises at least one air inlet formed in the connecting wall. The air inlet of the filtration chamber is in aeraulic communication with an air outlet of the suction unit, and the filtration chamber comprises at least one air outlet that is formed in the second wall.

Advantageously, the first wall is devoid of opening.

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

This configuration allows you to delimit the internal space between the walls that already exist in a traditional vacuum cleaner. The internal space can therefore be formed with fewer walls than in a traditional vacuum cleaner, which allows the portable vacuum cleaner to be further lightened and made more compact. This configuration also allows to maximize the internal space between the protective casing of the suction unit and the vacuum cleaner housing. On the other hand, since the first wall and the second wall are part of the same monobloc piece, the fact of forming the internal space between the protective casing of the suction unit and the housing of the vacuum cleaner does not alter the robustness of the vacuum cleaner. laptop in this place.

When the second wall forms a wall of the vacuum cleaner housing, said at least one air outlet is the exhaust hole. This configuration allows you to limit the number of ducts in the portable vacuum cleaner and simplify the latter.

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

Advantageously, the access opening that gives access to the internal space is in front of the removable bowl.

According to this configuration of the invention, a functional sub-assembly of the vacuum cleaner, such as a removable filter, can be easily removed from the internal space through the access opening when the removable bowl is separated from the vacuum cleaner housing. When the removable bowl is attached to the vacuum cleaner housing, the removable filter becomes inaccessible and cannot be removed from the internal space through the access opening.

Advantageously, the separation device is housed in the removable bowl in such a way that it can be separated from the housing of the vacuum cleaner with the removable bowl.

This construction allows the separation device to be removed with the removable bowl so that the separation device can then be more easily removed and cleaned.

Advantageously, the removable bowl is removably attached to the vacuum cleaner housing and contacts the vacuum cleaner housing through a contact surface formed on the vacuum cleaner housing. Advantageously, the contact surface is substantially annular, the internal space and the access opening are formed radially inside the substantially annular contact surface.

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

The substantially annular contact surface is easy to make on the second wall of the housing of the suction unit and allows for uniformly distributed contact of the removable bowl with the housing of the vacuum cleaner when the bowl is fixed to the housing of the vacuum cleaner. A uniformly distributed contact of the removable bowl with the housing of the vacuum cleaner makes it possible in particular to more easily create the seals at the level of this contact area.

The removable bowl can be fixed in different ways to the housing of the vacuum cleaner, in particular by snap-fitting, with the help of at least one notch and a locking latch, by a bayonet-type fixing means, by screwing or any other way. other means known to those skilled in the art.

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

Brief description of the figures

The following description highlights the characteristics and advantages of the present invention. This description is based on figures, among which:

[Fig. 1] Figure 1 illustrates an overall view of a portable vacuum cleaner according to a particular embodiment; [Fig. 2] Figure 2 illustrates the portable vacuum cleaner of Figure 1 according to a longitudinal sectional view;

[Fig. 3] Figure 3 illustrates the portable vacuum cleaner of Figure 1 according to a front three-quarter perspective view, without the removable bowl and without the separator;

[Fig. 4] Figure 4 illustrates a partial sectional view of the rear of the portable vacuum cleaner of Figure 3;

[Fig. 5] Figure 5 illustrates the portable vacuum cleaner of Figure 1 in a front three-quarter perspective view without the removable bowl and without the separator, with the removable filter partially removed from the filtration chamber;

[Fig. 6] Figure 6 illustrates a partial sectional view of the rear of the portable vacuum cleaner of Figure 5;

[Fig. 7] Figure 7 illustrates the portable vacuum cleaner of Figure 1 in a front three-quarter perspective view without the removable bowl and without the separator, with the removable filter completely removed from the filtration chamber;

[Fig. 8] Figure 8 illustrates a partial sectional view of the rear of the portable vacuum cleaner of Figure 7;

[Fig. 9] Figure 9 illustrates the crankcase of the suction unit of the portable vacuum cleaner of Figure 1 according to a front three-quarter perspective view;

[Fig. 10] Figure 10 illustrates the crankcase of the suction unit of Figure 1 in longitudinal section.

Detailed description

In the following description, the portable vacuum cleaner is called a vacuum cleaner.

Figures 1 to 10 represent a vacuum cleaner 1 comprising a vacuum cleaner housing 2, a grip handle 3 attached to the vacuum cleaner housing 2, an air suction inlet 4 through which the vacuum cleaner 1 can suck air, several orifices air exhaust 5 through which clean air can come out of the vacuum cleaner 1. The vacuum cleaner 1 also comprises an aeraulic circuit 6 that extends between the suction inlet 4 and the exhaust holes 5. The vacuum cleaner 1 comprises a suction unit 7 arranged in the aeraulic circuit 6. The suction unit 7 comprises an electric motor 7.1 and a fan 7.2 (represented in figures 2 and 4) coupled to the electric motor 7.1 to generate a flow of air in the aeraulic circuit 6 from the suction inlet 4 to the exhaust orifices.

5. The grip handle 3 can be manufactured in one piece with the vacuum cleaner housing 2 or added to it.

The vacuum cleaner 1 also comprises a waste separation device 8 arranged in the aeraulic circuit 6 upstream 6.1 of the suction unit 7. The waste separation device 8 is crossed by an air flow generated by the suction unit. 7 when vacuum cleaner 1 is operating. The vacuum cleaner 1 comprises a removable bowl 9, also known as the waste storage container, intended to receive and accumulate the waste separated by the waste separation device 8 and which is removably fixed to the housing. the vacuum cleaner 2. The waste separation device 8 is advantageously arranged inside the removable bowl 9. The removable bowl 9 in this case forms a separation chamber. Preferably, the waste separation device 8 is separable from the removable bowl 9 in order to be able to more easily empty the contents of the removable bowl 9 when the latter is separated from the vacuum cleaner housing 2. The air suction inlet 4 is attached to the separation chamber, corresponding to the interior of the removable bowl 9, through an air intake duct 4.1 (represented in figure 2).

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

The vacuum cleaner 1 comprises a vacuum cleaner start-up button 11 that controls in particular the start-up of the suction unit 7 when it is operated by the user.

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

Advantageously, and as shown in Figures 1 to 10, the separation 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. The rotation axis X in this configuration is a main axis of vacuum cleaner 1.

The suction unit 7 belongs to the rear part 13 of the vacuum cleaner 1 and the waste separation device 8 is located in front of the suction unit 7. Figures 4 and 6 represent the rear part 13 of the vacuum cleaner 1. In In the embodiment shown in the figures, the suction inlet 4 of the vacuum cleaner 1 forms a front end of the portable vacuum cleaner 1. This suction inlet 4 advantageously protrudes forward with respect to the rest of the portable vacuum cleaner 1, in particular with with respect to the removable bowl 9.

The vacuum cleaner 1 further comprises a suction unit casing 12 that 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. aspiration 7.

The suction unit casing 12 is visible in figures 2 to 10 and more specifically in figures 9 and 10. The suction unit casing 12 serves in particular to locate and hold the suction unit 7 on the vacuum cleaner 1 and also to protect the suction unit 1.

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

The casing of the suction unit 12 comprises an air inlet opening 12.1 and an air outlet opening 12.2 which are in aeraulic communication with the suction unit 7 and which are arranged on either side of the suction unit 7. according to the direction of the axis of rotation The upstream part 6.1 of the aeraulic circuit 6 is located upstream of the suction unit 7 and extends between the suction inlet 4 and the suction unit 7. The downstream part 6.2 of the aeraulic circuit 6 is located downstream of the aeraulic circuit 6. suction 7 and extends between the suction unit 7 and the exhaust ports 5.

The separation device 8 is arranged in the upstream part 6.1 of the aeraulic circuit 6.

In the embodiment of Figures 1 to 10, the separation device 8 is advantageously a cyclonic separator having a main axis that is coaxial with the axis of rotation X of the output shaft of the electric motor. In a variant embodiment not shown and without departing from the framework of the invention, the separation device could be made of a filter that includes a porous filter medium to allow air to pass through and prevent waste from passing through it.

To limit the suction of dust in the suction unit 7, the vacuum cleaner may comprise, in addition to the waste separation device 8, an upstream filter 13 which in the aeraulic circuit is arranged between the waste separation device 8 and the suction unit 7. This upstream filter 13 is preferably of the removable type, is frustoconical in shape and is housed in a central part of the cyclone separator.

To limit or prevent dust from escaping through the exhaust holes 5, the vacuum cleaner 1 preferably comprises, in addition to the waste separation device 8, a downstream filter 14 which is arranged in the downstream part 6.2 of the aeraulic circuit 6.

As shown more particularly in Figures 4, 6, 8, 9 and 10, 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 is formed at a distance from the first wall 12.3 to delimit, at least in part, an internal space 15 of the portable vacuum cleaner 1 that extends between the first wall 12.3 and the second wall 12.4.

The first wall 12.3 and the second wall 12.4 are advantageously of annular shapes 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 delimit, at least in part, the internal space 15 that extends in an annular shape around the suction unit 7. In the example embodiment of the figures, the first wall 12.3 and the second wall 12.4 are more specifically of tubular shapes. In a variant embodiment not shown, the first wall and the second wall could also have substantially truncated conical shapes.

In another embodiment variant not shown, the first wall and the second wall are partially annular in shape around the axis of rotation of the electric motor in such a way that the first wall and the second wall delimit an internal space of partially annular shape around the suction unit. According to this variant, the internal space could have, for example, the shape of a ring section or a section whose shape would be "C" (non-closed ring).

According to the embodiment shown in the figures, 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 a single piece, preferably in a single piece obtained by plastic injection. Advantageously, the connecting wall 12.5 extends radially with respect to the rotation axis As shown in Figures 9 and 10, the connecting wall 12.5 has the shape of an annular disk. In a variant such as the one described above in which the first wall and the second wall are partially annular in shape around the axis of rotation of the electric motor, the connecting wall does not necessarily have an annular shape, it could for example have the shape of a disc section or a substantially rectangular or trapezoidal shape or a "C" shape.

In another embodiment variant (not shown) the first wall and the second wall could be joined by connecting arms that extend radially between the first wall and the second wall. According to this variant, the first wall 12.3, the second wall 12.4 and the connecting arms would advantageously be made in a single piece, preferably in a single piece obtained by plastic injection.

According to the embodiment represented in the figures, the suction unit casing 12 comprises an access opening 12.6 for accessing the internal space 15. The connecting wall 12.5 is formed on one side of the suction unit casing 12 that is opposite the access opening 12.6. Thus, the internal space 15 is defined by the walls 12.3, 12.4 and 12.5 of the suction unit casing 12 which, in a half section, for example a half section of Figure 10, substantially form a "U". This U shape is shown in dashed lines in Figure 10 and is referenced 15.1. The access opening 12.6 is in front of the removable bowl 9.

According to the embodiment shown in the figures, the internal space 15 forms a filtration chamber in which a filter is placed. The filtration chamber and the filter are arranged in the aeraulic circuit 6 and are crossed by an air flow generated by the suction unit 7 when the vacuum cleaner 1 is in operation.

In the embodiment shown in the figures, the filtration chamber 15 is arranged in the downstream part 6.2 of the aeraulic circuit 6 and the filter is a downstream filter 14 as described above.

In the embodiment shown in the figures, the filtration chamber 15 and the downstream filter 14 have an annular shape that extends around the suction unit 7.

The downstream filter 14 is preferably removable and the access opening 12.6 allows the filter 14 to be placed in the filtration chamber or the filter 14 to be removed when the removable bowl 9 is separated from the vacuum cleaner housing 2.

Figures 1 and 2 show the vacuum cleaner 1 in operation, that is, with the removable filter 14 placed in the filtration chamber and the removable bowl 9 attached to the housing of the vacuum cleaner 2. Figures 3 to 8 in turn show 3 stages successive steps of disassembly of the downstream filter 14 until the complete removal of the downstream filter 14.

Indeed, Figures 3 and 4 show the vacuum cleaner 1 in a first stage of disassembly in which the removable bowl 9 is separated and in which the downstream filter 14 remains in place in the filtration chamber. Figures 5 and 6 show the vacuum cleaner, in a second disassembly stage in which the downstream filter 14 is partially removed from the filtration chamber following a translational movement of the removable filter along the main axis X. Figures 7 and 8 show the vacuum cleaner, in a third disassembly stage in which the downstream filter 14 is completely removed from the filtration chamber.

In embodiment variants not shown, the internal space could receive, instead of a downstream filter, an upstream filter (belonging to the upstream part 6.1 of the aeraulic circuit 6) or another functional subset of the portable vacuum cleaner such as, for example , a noise attenuator or absorber, an electronic control or control card for the portable vacuum cleaner, etc. The internal space could also be used to define an air duct.

The filtration chamber formed by the internal space 15 comprises at least one air inlet 12.7 formed in the connecting wall 12.5. As shown in Figure 9, several air inlets 12.7 are advantageously formed in the connecting wall 12.5. The air inlets 12.7 are in aeraulic communication with the air outlet 12.2 and with the suction unit 7. The filtration chamber comprises at least one air outlet that is formed in the second wall 12.4. Advantageously, the filtration chamber comprises several air outlets formed in the second wall 12.4.

The first wall 12.3 is advantageously devoid of an opening.

In the embodiment shown in the figures, two portions of the second wall 12.4 form two walls 2.1 and 2.2 of the vacuum cleaner housing 2 and the air outlets made in the second wall 12.6 form the exhaust holes 5 which, in the present embodiment, are formed in walls 2.1 and 2.2. The walls 2.1 and 2.2 are arranged symmetrically on either side of the vacuum cleaner 1.

The second wall 12.4 that forms the walls 2.1 and 2.2 of the vacuum cleaner housing 2 is, in a direction parallel to the axis of rotation A of the electric motor 7.1, arranged between the removable bowl 9 and a rear part 2.3 of the vacuum cleaner housing. vacuum cleaner 2.

In the embodiment shown in the figures, the removable bowl 9 is removably fixed to the vacuum cleaner housing 2 through a contact surface 12.8 formed by a substantially annular axial end of the second wall 12.4 of the housing of the vacuum cleaner. suction unit 12.

The removable bowl 9 is reversibly fixed to the vacuum cleaner housing 2. The removable bowl 9 can be fixed in different ways to the vacuum cleaner housing 2, in particular by snap-fitting, by a bayonet type fixing means. , by screwing or as shown for example in Figure 1 with the help of at least one notch 19 and a locking latch 20,

Naturally, the present invention is in no way limited to the described and illustrated embodiment, which has been given by way of example only. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without however going beyond the scope of protection of the invention.

Claims (16)

1. Portable vacuum cleaner (1) comprising a vacuum cleaner housing (2), a grip handle (3) attached to the vacuum cleaner housing (2), a suction inlet (4) through which the portable vacuum cleaner (1) can suck air, at least one exhaust hole (5) through which clean air can escape from the portable vacuum cleaner (1), an aeraulic circuit (6) that extends between the suction inlet (4) and the exhaust hole (5), a suction unit (7) arranged in the aeraulic circuit, the suction unit (7) comprising an electric motor (7.1) and a fan (7.2) coupled to the electric motor (7.1) to generate an air flow in the aeraulic circuit (6) from the suction inlet (4) to the exhaust hole (5), a waste separation device (8) arranged in the aeraulic circuit (6) upstream of the suction unit (7) and which is crossed by an air flow generated by the suction unit (7) when the portable vacuum cleaner (1) is in operation, a removable bowl (9) intended to receive the waste separated by the waste separation device (8) and which is removably attached to the housing of the vacuum cleaner, a suction unit casing (12) comprising a first wall (12.3) that covers, at least partially, the suction unit (7), in which the suction unit casing (12) comprises a second wall (12.4) that covers, at least partially, the first wall (12.3), and The second wall (12.4) is formed at a distance from the first wall (12.3) to delimit, at least in part, an internal space (15) in the portable vacuum cleaner (1) that extends between the first wall (12.3) and the second wall (12.4), characterized by The electric motor (7.1) comprises an output shaft (7.3) that has an axis of rotation (X), the output shaft (7.3) being coupled to the fan (7.2), and in which the first wall (12.3) and The second wall (12.4) is partially annular in shape around the axis of rotation (X), the first wall (12.3) and the second wall (12.4) delimiting an internal space (15) of partially annular shape around the suction unit. (7). 2. Portable vacuum cleaner (1) according to claim 1, in which the first wall (12.3) and the second wall (12.4) are manufactured in one piece. 3. Portable vacuum cleaner (1) according to claims 1 or 2, in which the electric motor (7.1) comprises an output shaft (7.3) having an axis of rotation (X), the output shaft (7.3) being coupled. to the fan (7.2), in which the first wall (12.3) and the second wall (12.4) are annular in shape, for example tubular or truncated conical, substantially coaxial with the axis of rotation (X), and in which the first wall (12.3) and the second wall (12.4) delimit, at least in part, an internal space (15) of an annular shape that extends around the suction unit (7). 4. Portable vacuum cleaner (1) according to any one of claims 1 to 3, the first wall (12.3) and the second wall (12.4) are joined by at least one connecting wall (12.5), the first wall (12.3), the second, the wall (12.4) and the connecting wall (12.5) are made in a single piece, preferably in a single piece obtained by plastic injection. 5. Portable vacuum cleaner (1) according to claim 4, in which the connecting wall (12.5) extends radially, with respect to the axis of rotation of the electric motor, between the first wall (12.3) and the second wall (12.4) . 6. Portable vacuum cleaner (1) according to claim 4, in which the connecting wall (12.5) has an annular disc shape. 7. Portable vacuum cleaner (1) according to any one of claims 1 to 3, in which the first wall (12.3) and the second wall (12.4) are joined by connecting arms, the first wall (12.3), the second wall (12.4) and the connecting arms are made in a single piece, preferably in a single piece obtained by plastic injection. 8. Portable vacuum cleaner (1) according to any one of claims 1 to 7, in which the casing of the suction unit (12) comprises an access opening (12.6) to access the internal space (15), the connecting wall (12.5) preferably on one side of the suction unit crankcase (12) that is opposite to the access opening (12.6). 9. Portable vacuum cleaner (1) according to any one of claims 1 to 8, in which the internal space (15) forms a chamber or a duct located in the aeraulic circuit (6) and which are crossed by an air flow generated by the suction unit (7) when the portable vacuum cleaner (1) is in operation. 10. Portable vacuum cleaner (1) according to any one of claims 1 to 9, in which the internal space (15) forms a filtration chamber, in which a filter (14) is placed, the filtration chamber being arranged and the filter (14) in the aeraulic circuit (6) and being crossed by an air flow generated by the suction unit (7) when the portable vacuum cleaner (1) is in operation. 11. Portable vacuum cleaner (1) according to the preceding claim, in which the filtration chamber and the filter (14) are arranged in the aeraulic circuit (6) downstream of the suction unit (7). 12. Portable vacuum cleaner (1) according to claims 4, 8 and one of claims 10 or 11, in which the filtration chamber is at least partially delimited by the first wall (12.3), the second wall (12.4) and the connecting wall (12.5), allowing the access opening (12.6) to place or remove the filter (14). 13. Portable vacuum cleaner (1) according to any one of claims 10 to 12, in which the filtration chamber and the filter (14) have an annular shape that extends around the suction unit (7). 14. Portable vacuum cleaner (1) according to claim 12, in which the filtration chamber comprises at least one air inlet (12.7) formed in the connecting wall, the air inlet of the filtration chamber being in aeraulic communication with an air outlet of the suction unit (7), and the filtration chamber comprises at least one air outlet that is formed in the second wall (12.4). 15. Portable vacuum cleaner (1) according to any one of claims 1 to 14, wherein at least a portion of the second wall (12.4) forms at least one wall (2.1,2.2) of the vacuum cleaner housing (2) . 16. Portable vacuum cleaner (1) according to claims 14 and 15, wherein said at least one air outlet of the filtration chamber is said at least one exhaust hole (5).