SK40998A3 - Vaccum cleaner and sealed bag for collecting waste material - Google Patents

Abstract

The invention relates to a vaccum cleaner comprising a suction system (2) provided with a filter (2a), a compartment (1) situated above a tight bag (20) for collecting waste material, a hose (4) opening into the tight bag (20), a pressure tap (5) communicating with the container, a complementary filtering means (25) associated to the tight bag (20) and covering at least partially the interior volume (21) of said tight bag (20) and providing on the one hand for a charge loss in the sucked air flow (20) and on the other hand generating in the container (3), outside the tight bag (20), a vaccum higher than that prevailing inside said tight bag (20). According to the invention, the tight bag (20) is intented to be set in place into the container (3) independently of the complementary filtering means (25).

Description

Technical field

The invention relates to suction systems and in particular to vacuum cleaners used for cleaning and cleaning. In particular, it is directed to vacuum cleaners for sucking up dirt of any type and possibly dirt in the form of liquids. The invention further relates to the connection of such a vacuum cleaner to a tight bag for collecting dirt to be placed in a vacuum cleaner.

BACKGROUND OF THE INVENTION

It is known to use disposable bags for vacuum cleaners of tight material. GB-A-2 141 635 discloses a pot-type vacuum cleaner (with a pot-shaped cupboard) in which a tight bag is used, supported on a corresponding carrier resting on the bottom of the pot (cupboard). The vacuum generated in the vacuum cleaner allows suction of dirt inside the tight bag and expels the filtered air by connecting it to the motor, fan and filter. The design of the vacuum cleaner is designed to create free space around the tight bag. This air circulation inside the pot allows to balance the pressures acting inside and outside the tight pocket.

Such vacuum cleaners have a number of disadvantages. It is very difficult to achieve a balance between the inside and outside of the tight pocket. It also requires the use of a suitable carrier. The use of a particular corresponding carrier requires, on the one hand, very precise dimensions of said carrier and, on the other hand, increases the number of components that make up such a device. In addition, it is clear that as soon as the cleaning or cleaning process is complete, the user has to handle the bag filled with dirt that is capable of getting into the tidy environment when the bag is inattentively opened. The filter used in this suction system also exhibits considerable or frequent fouling which requires regular replacement.

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It is also known to use an additional filter means associated with a tight bag. DE-G-90 17 798.3 discloses a pot-type vacuum cleaner in which a replaceable dust collection means is used, comprising a tight dust bag and a filter part, held together by a supporting annular part adapted to rest against the annular fold formed in the pot of the apparatus. The apparatus also includes, in addition to the tight pocket, a pressure passageway between the pot and the suction channel of the apparatus, generating a stronger vacuum outside the tight pocket than inside the tight pocket, in which case the air must gradually pass through the additional filter means and engine filter. In this embodiment, the presence of an additional filter means firmly attached to the working bag precludes the user having to handle the full dust bag in contact with the ambient air. Such vacuum cleaners have the disadvantage that the dust bag is difficult to fit into the appliance pot. It is preferable to be able to develop the walls of the bag newly inserted into the pot to assist in the depressurization acting outside the bag and to prevent these walls from clogging the additional filter means.

SUMMARY OF THE INVENTION

The present invention provides a vacuum cleaner comprising a suction system, a chamber positioned above a pot (housing, container, cabinet) for receiving a tight bag for collecting dirt, through a tube opening into the tight bag to allow the suction air to circulate through the tube into the inner space of the tight bag. a system equipped with a filter for discharging filtered air, further comprising a pressure extraction passage communicating with the pot, an additional filter means associated with the sealing bag, covering at least partially the internal volume of the sealing bag, allowing both pressure loss in the intake air flow; on the other hand, to generate a vacuum in the pot outside the sealing bag higher than that in the sealing bag, which is based on the fact that the sealing bag is adapted to be inserted into the pot independently of the additional filter means.

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Furthermore, the invention provides an additional filter means for use in a vacuum cleaner, characterized in that it comprises at least two intake air permeable layers.

The invention furthermore relates to a tight bag intended for use in a vacuum cleaner with supplementary filter means, characterized in that it comprises an adhesive part intended to fasten said supplementary filter means.

Finally, the invention relates to the use of a tight bag associated with an additional filter means and adhesive means in a vacuum cleaner comprising a pot (a container, a container, a box) and a filter for cleaning the intake air stream by placing a tight bag in a pot with adhesive The filtering means and the sealing bag are joined together, cleaning or cleaning processes are carried out and the assembly of said additional filtering means and the sealing bag is removed and joined together.

The invention provides a vacuum cleaner with ease of use. It also provides a suction assembly whose function is improved and whose maintenance operations are very limited. The sealing bags of the invention allow for ease of use and provide users with cleaner work and less frequent clogging of the filter associated with the suction system.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in more detail below with reference to the accompanying drawings, in which: FIG. 1 is a sectional view of a vacuum cleaner provided with a tight bag according to the invention, FIG. 2 shows a functional diagram of a vacuum cleaner according to the invention, FIG. 3 shows a detail of a part of a vacuum bag provided with a tight bag, according to an embodiment of the invention, FIG. 4 shows a detail of a part of a vacuum cleaner provided with a tight bag, according to an alternative embodiment of the invention,

3Π Q1RZR fig. 5 shows a section through a vacuum bag with a tight bag, according to a further variant of the invention, FIG. 6 shows a detail of a part of a vacuum cleaner provided with a tight bag according to the invention, and FIG. 7 is a perspective view of a sealing bag according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

The vacuum cleaner shown in FIG. 1 is formed by a pot (box container, container, box) 3, placed beneath a chamber 1 containing a suction system 2. The pot 3 is designed to receive a tight bag 20 for collecting dirt. The tube 4 flows into the tight bag 20 so as to allow air to be sucked through the tube 4 into the inner volume 21 of the tight bag 20 through the suction system 2. This suction system 2 consists of an electric motor 2c associated with the turbine 2b exerting vacuum inside the vacuum cleaner. In the suction system 2, a filter 2a is also inserted in order to eject filtered air.

Fig. 2 shows a simplified flow diagram of the individual air streams. The intake air 12 thus passes through the tube 4 and enters the vacuum cleaner and is slowly ejected from the vacuum cleaner by the turbine 2b in the form of filtered air 13. The cooling air stream 10, 11. is also used to cool the 2c engine during operation. It is understood that the end of the tube 4 lying outside the vacuum cleaner is terminated by a flexible hose and a cleaning mechanism of the suction head type, brush or other known cleaning means.

The vacuum cleaner according to the invention also comprises means for allowing a vacuum to be created around the seal bag 20 within the pot 3. Such means are necessary to achieve inflation of the seal bag 20 when stored inside the pot and when the vacuum cleaner is put into operation. Thus, the sealing bag 20 is associated with an additional filter means 25, covering at least partially the internal volume 21 of said sealing bag 20 and allowing a pressure drop to be generated in the intake air flow 12.

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The additional filter means 25 also allows to transfer to the pot 3 a pressure greater than that which acts inside the sealing bag 20 outside the sealing bag 20. Thus, the vacuum cleaner according to the invention comprises a tube 4, an inner space 21 of the sealing bag 20 filter means 25 and filter 2a embedded in the suction system 2.

Preferably, the means for generating a vacuum in the pot 3 and around the tight bag 20 is a pressure-withdrawing passage 5 which communicates on the one hand with the pot 3 and on the other hand with a space 6 lying at least partially between the filter 2a and the additional filter means 25. it is preferably close to the interface between the chamber 1 and the pot 3. In the embodiment of the vacuum cleaner according to the invention shown in FIG. 1 and 2, this space 6 extends mainly above and against the supplementary filter means 25, the supplementary filter means 25 thus providing a separation, of course permeable to the intake air 12, between the internal volume 21 and the suction system 2. The pressure extraction passage 5 for example, it is formed with one or more conduit portions extending into the free space 3a around the tight bag 20.

The mounting of the chamber 1 on the pot 3 is ensured in a known manner by means of known fastening means in order to achieve a perfect tightness and thus to define the free space 3a. Such a solution makes it possible to prevent the accidental supply of air not compensated by the passage 5. Such an accidental function could result in suction of the sealing bag 20 to the supplementary filter means 25 and blocking the intake air path 12. The supplementary filter means 25 In the operation of the vacuum cleaner, a higher vacuum is thus obtained in the space 6 and consequently in the free space 3a than in the internal volume 21. The pressure difference is of the order of several hundred Pa and preferably 1 kPa on the inlet and outlet side the filter means 25 thus makes it possible to inflate and / or deflate the tight bag 20.

In the embodiment shown, the vacuum cleaner according to the invention consists of a chamber 1, an additional filter means 25, a tight bag 20 and a pot 3, which together form easily removable elements from one another. Chamber 1 is

The supplementary filter means 25 is preferably formed with a rigid material or materials permeable (i) to the intake air 12 and provided with an opening 26 through which the end 4a of the tube 4 passes as indicated. additional filter means 25 mounted in a vacuum cleaner. The materials constituting the additional filter means 25 are, for example, paper, paperboard or any other synthetic material having filter properties adapted to both the quality of filtration required with the filter means and the desired differential pressure at the inlet and outlet sides of the additional filter means 25. it is preferably provided with resilient tongues closing it when the tube end 4a is withdrawn from the filter means 25.

The housing 3 preferably has a peripheral edge 3b at its upper part, bent, for example, in a horizontal plane towards the interior of the pot 3, to provide support for the chamber 1 when the chamber 1 is assembled with the pot 3. similar to a garbage container bag, with dimensions preferably adapted to the size of the vacuum cleaner. Once the tight pocket 20 is once housed in the pot 3, its upper end 22 rests on the peripheral edge 3b. This is also the case for the additional filter means 25. This can be provided with a portion foldable onto the opening 26 while forming the filter means.

The pressure removal port 5 as shown in FIG. 1, is preferably formed as a channel firmly connected to the chamber 1 or forms an integral part thereof. The peripheral edge 3b is also provided with an opening 3c through which a portion of the pressure relief passage 5 passes when the chamber 1 is mounted on the pot 3. It is clear that the pressure relief passage 5 is designed to protrude outside the abutment area 1a provided therein. a chamber 1 for resting or resting on the upper peripheral edge 3b. The insertion of the channel forming the pressure-receiving port 5 into the opening 3c can be secured by known means in combination with, for example, a seal. The end 4a of the tube 4 also has dimensions adapted to be inserted into the opening 26. According to a variant of the vacuum cleaner according to the invention, one or more pressure-withdrawing passages 5 are formed directly on the peripheral edge 3b, as shown in FIG. 2. It is therefore up to the user who fits the tight bag 20 into the pot 3 to properly fit and / or perforate the upper end 22 of the bag and possibly

915 / B an additional filter means 25 and thus allowed a pressure take-off passage 5 to fulfill the function assigned to it.

In this case, the periphery of the additional filter means 25 preferably extends above the peripheral edge 3b and is compressed between the peripheral edge 3b and the support region of the chamber 1.

Preferably, the supplementary filter means 25 comprises at least two layers 30, 31 of a nonwoven fibrous synthetic material as shown in FIG. 3. The layer 30 through which the intake air flow 12 passes before the layer 31 is thicker than the layer 31 that passes thereafter. The thickness of the layer 60 makes it possible to obtain a volume filtration which is intended to delay the tight closure of the layer 31 with small particle size. The layer 31 serves for dust filtration. It prevents fine particles from passing through the additional filter means 25. The additional filter means 25 preferably consists of hydrophobic materials which do not retain water and which in turn repel it when used for liquid or wet garbage. For example, the layer 30 may consist of a polyester fiber material and the layer 31 may be a polypropylene microfibrous material, one of which may be electrically charged.

Preferably, the filter means 25 has an adhesive portion 25a for securing assembly or engagement with a portion of the sealing bag 20 covering the peripheral ring 3c. Alternatively, the sealing pocket 20 may have an adhesive portion 25a. Fig. 3 also shows a pressure-withdrawing passage 5 formed in the peripheral edge 3b, outside the peripheral ring 3c, thus bringing the space 6 and the free space 3a together. The chamber 1 is preferably tightly mounted on the pot 3, for example by means of an annular seal 34, as shown in FIG. Third

According to the embodiment of the invention shown in FIG. 4, the tight bag 20 is provided around its end 22 with a rigid strip 22a, for example a non-extensible and / or sticky, intended to be placed around the edge fold of the pot. Thus, the sealing bag 20 is slid onto a carrier of the peripheral ring 3c type, firmly connected to the peripheral edge 3b. The tight bag 20 is fitted in a hat-like manner or threaded onto the pot 3 by means of this rigid strip 22a before being inverted to allow it to fit inside the pot 3, while the rigid strip 22a remains

915 / B mounted on the peripheral ring 3c. Such a stepping is carried out particularly simply, as shown in particular in FIG. 4. The filter means 25 is then mounted on the pot 3 and more precisely on the peripheral ring 3c. For example, an adhesive portion may be provided on the strip 22a.

According to another variation, not shown in the drawings, the sealing bag 20 comprises closing couplings located at the level of its end 22. These couplings allow to keep the end of the bag 20 around the peripheral ring 3c of the pot 3 before fitting the additional filter means 25. for use in closing the additional filter means 25 inside the bag. The user can thus pull the bag completely closed from the vacuum cleaner.

According to a variant of the vacuum cleaner according to the invention, the supplementary filter means 25 is mounted on the tight bag 20, which is intended to be used in a vacuum cleaner and associated with the supplementary filter means 25 while covering access to the inner volume 21 of the tight bag 20 while providing an opening 26 which is capable of inserting into it the end 4a of the tube 4 when the additional filter means 25 is mounted in a vacuum cleaner. The sealing bag 20 is preferably fixed inseparably to the filter means 25. An embodiment of the sealing bag 20 according to the invention is shown in FIG. 7. The overall configuration of the bag extending into the interior of the pot 3 is arbitrary and can be adapted to the overall shape of the pot 3 so as to provide the user with a means for collecting waste with a maximum content.

The sealing bag 20 shown in FIG. 7, has a cylindrical shape when unfolded and has an additional filter means 25 at its upper part. This means is welded, glued or fixed by any known means on the tight pocket 20.

The sealing bag 20 preferably has a rigid ring 27, on the one hand ensuring mechanical cohesion with the additional filter means 25 and, on the other hand, facilitating the fitting of the bag into the vacuum cleaner. For example, the rigid ring 27 is used as an interface between the upper end 22 of the sealing bag 20 and the additional filter means

Such a solution makes it possible to facilitate the assembly of the sealing bag 20 if it is assumed that the material forming the sealing bag 20 is a thin and flexible plastic film. The rigid ring 27 may also be provided with one or more apertures of dimensions

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adapted to receive the pressure passage 5 and / or to accommodate the tight bag 20 in the vacuum cleaner pot 3 in cooperation with the positioning pins, not shown in the drawings, and distributed around the peripheral edge 3b. The rigid ring 27 may also be formed of a compressible material which confers a sealing role upon it when the chamber 1 is mounted or attached to the pot 3. For forming such a rigid ring 27 any material of the type cardboard, rubber or plastic or a combination of these materials may be considered. In any case, the ring 27 has sufficient flexibility not to interfere with the tightness achieved between the chamber 1 and the pot 3.

Such an assembly can also be achieved according to a variant of the vacuum cleaner according to the invention by tightly attaching the rigid ring 27 on the entire outer circumference 28 at the peripheral edge 3b. The apertures 29 distributed over the rigid ring 27, but within this outer periphery 28, are in this case used to connect with the pressure-withdrawing passage 5 or to insert the sleeve defining the passage 5.

Preferably, a circumferential groove is formed in the support region 1a of the chamber 1, which rests on the peripheral edge 3b such that it preferably covers one of the openings 29. It will be understood that such a circumferential groove (not shown in the drawings) will have to be in loose connection with the space 6 where the vacuum is to be transmitted around the tight bag 20.

According to another embodiment of the invention shown in FIG. 5, the vacuum cleaner includes a deflector 32 mounted on the natural intake air path 12 between the additional filter means 25 and the filter 2a. The deflector 32 is preferably provided with pin-like projections 32a abutting the supplementary filter means 25, thus creating a space between the wall of the deflector 2 and the supplementary filter means 25. This deflector allows to distribute the air flow 12 more evenly over the entire surface of the supplementary filter means 25. preferably fixed to the chamber 1, for example at the level of the filter 2a.

According to a second variant of the invention, shown in particular in FIG. 6, the vacuum cleaner includes a plate 33 into which additional filter means is inserted

25. The plate 33 is preferably provided with an annular fold 35 and pins 36,

915 / B mounted on the inner wall of the column 37 intended to retain the additional filter means 25 as well as the sleeve 34 intended to extend the end 4b of the tube 4 for insertion into the opening 25 of the filter means 25. Preferably the plate 33 is provided with centering means. 38 to ensure correct positioning on the pot 3. FIG. 6 shows the centering means 38 intended to be inserted into the openings formed in the wall of the pot 3 to form a pressure-withdrawing passage 5, with the opening 38a passing through the centering means alone.

Thus, the user has the advantage of facilitating the storage of the additional filter means 25, especially with respect to the rigidity supplied by the plate 33. The plate 33 straight allows the user to more easily pull out the filled bag 20.

By way of example, the deflector 32 may be mounted to the plate.

According to further variations, the additional filter means 25 is washable and reusable. In this case, the composition may consist of one or more layers of synthetic material or a sheet stretched on a plate

33. It is thus possible to have filter means adapted to the work to be carried out.

It is also conceivable to use a vacuum cleaner according to the invention with an additional filter means 25 mounted on the pot 3 without a tight bag 20, the filter means 25 possibly being inserted into the plate 33. It is also possible for the additional filter means 25 to consist of more than two layers 30, 31, for example, a very thick first layer retaining particles of a large size but lightweight, such as hair, hair, etc., and a second layer providing a fine particle thickness filtration, and a third layer to retain these particles.

Accordingly, the invention is based on the use of supplementary filter means 25 in a vacuum cleaner already provided with a filter 2a associated with the suction system 2 for cleaning the intake air 12. Such use of the supplementary filter means 25 makes it possible to improve the filtration of the intake air 12 and create a vacuum around the dust bag 20 stored in a vacuum cleaner. If the vacuum cleaner according to the invention is to be used, it is sufficient to place the tight bag 20 in the pot 3, fit the filter supplementary means 25, possibly guided into the plate, onto the thus formed assembly.

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915 / B and then close the chamber 1 on the pot 3. The vacuum cleaner is now ready for use.

The advantage of the vacuum cleaner according to the invention lies in the ease of use of such a vacuum cleaner. It is sufficient to separate the chamber 1 from the pot 3, fit the tight bag 20 inside the pot 3, fit the additional filter means 25, which can possibly be inserted into the plate 3, and then close the chamber 1 on the pot 3 again.

An additional advantage of the vacuum cleaner according to the invention lies in the installation of the tight bag 20 in the pot 3. The user places the bag 20 in the pot 3 and starts to develop it against the walls. This eliminates the major disadvantage that the bag 20 is carried against the supplementary filter means 25 by the air stream 12 before it develops under the effect of the vacuum generated by the air stream 12 passing through the supplementary filter means 25.

An essential advantage of the vacuum cleaner according to the invention lies in the very low manufacturing cost of the sealing bag 20 and the additional filter means 25, since there is no need to carry out any special manipulations on the bag or the high assembly costs.

Another advantage of the vacuum cleaner according to the invention is the possibility of using any tight bag 20 with a capacity related to the capacity of the bag 3 without having to obtain a bag specially designed for the vacuum cleaner.

Another advantage of the invention, and in particular of the sealing bag 20 according to the invention, lies in the first filtration, which is obtained by the additional filter means 25, thereby increasing the service life of the filter 2a associated with the suction system 2. This also results in increased cleaning of the expelled air stream 13.

A further advantage with the use of the sealing bag 20 according to the invention resides in the sealing of the suction impurities it provides to the user. The sealing bag 20 can be easily released from the pot 3 without the risk of more or less sucked in dust being discharged.

The invention further provides reliability of use, since in the case where the tight pocket 20 within the pot 3 has a crack, the dirt sucked out of the pot 3 via

915 / B the pressure relief port 5, stopped by the filter 2a and will not be able to directly enter the engine compartment 2c and damage it.

A further advantage of the vacuum cleaner according to the invention resides in the use of an additional filter means having at least two layers 30, 31. The layer 30, thicker than the layer 31 through which the intake air flow 12 passes first, delays the clogging of the layer 31 with fine particles.

A further additional advantage of the vacuum cleaner according to the invention lies in the placement of the additional filter means 25. This placement in the upper part of the pot 3 is of interest in that all vibrations transmitted to the vacuum cleaner, for example when moved, are transmitted by the additional filter means 25. it can remove dust adhering to its wall, which is in connection with the internal volume.

Furthermore, the invention has the advantage that the pot 3 is kept clean even when impurities such as water, oil or any other liquid dispersed on the surface to be cleaned are sucked. All these impurities remain inside the tight bag 20.

A further advantage of the vacuum cleaner according to the invention is the use of an apparatus with additional filter means 25 without placing a tight bag in the pot for suction of large amounts of water.

The vacuum cleaner according to the invention further provides the advantage of using a plate 33 in which an additional filter means is inserted, thus facilitating the deposition of the additional filter means 25 on the pot 3.

A further advantage of the invention is that a washable and reusable filter means 25 is used, with or without a dirt collection bag.

Claims (22)

PATENT CLAIMS A vacuum cleaner comprising a suction system (2), a chamber (1) located above a pot (3) for receiving a tight bag (20) for collecting dirt, a tube (4) opening into the tight bag (20) to allow circulation of the sucked air stream (12) through a tube (4) to the interior space (21) of the tight bag (20) and to the suction system (2) provided with a filter (2a) for discharging filtered air, further comprising a pressure removal port (5) a connection to the pot (3), additional filter means (25) associated with the tight pocket (20), covering at least partially the inner space (21) of the tight pocket (20), allowing both pressure drop in the intake air flow (12) and thus generating a vacuum in the pot (3) outside the sealing bag (20) higher than that applied in said sealing bag (20), characterized in that the tight bag (20) is adapted to be inserted into the pot (3) independently of the additional filter (25). Vacuum cleaner according to claim 1, characterized in that the additional filter means (25) is formed by at least two layers (30, 31) permeable to the intake air (12). Vacuum cleaner according to claim 2, characterized in that the layer (30) through which the intake air flow (12) passes first is thicker than the layer (31) through which this air flow passes subsequently. Vacuum cleaner according to claim 2 or 3, characterized in that at least one of the two layers (30, 31) is a hydrophobic material. Vacuum cleaner according to at least one of claims 2 to 4, characterized in that at least one of the two layers (30, 31) is an electrically charged material. Vacuum cleaner according to at least one of Claims 1 to 5, characterized in that the supplementary filter means (25) comprises an adhesive part (25a) intended to be fixed to the tight bag (20) for receiving dirt. Vacuum cleaner according to at least one of Claims 1 to 5, characterized in that the additional filter means (25) is washable and reusable. Vacuum cleaner according to at least one of Claims 1 to 7, characterized in that it comprises a deflector (32) disposed between the additional filter means (25) and the filter (2a) on a preferred air flow path in the absence of such a reflector (32). Vacuum cleaner according to at least one of Claims 1 to 8, characterized in that it comprises a plate (33) forming an intermediate piece between the pot (3) and the tube (4) in which the additional filter means (25) is inserted. Vacuum cleaner according to claim 9, characterized in that the deflector (32) is mounted on the plate (33). Vacuum cleaner according to at least one of claims 1 to 10, characterized in that the pressure-withdrawing passage (5) connected to the pot (3) is connected on the other side to a space (6) lying at least partially between the filter (2a) ) and additional filter means (25). Vacuum cleaner according to at least one of Claims 1 to 11, characterized in that the chamber (1), the filter (2a), the additional filter means (25) and the pot (3) are easily removable from each other. Vacuum cleaner according to at least one of Claims 1 to 12, characterized in that the supplementary filter means (25) is provided with an opening (26) through which the end (4a) of the suction tube (4) passes when said supplementary filter means (25). ) for cleaning or cleaning operations. ΟΛ 04 CfD Vacuum cleaner according to at least one of Claims 1 to 13, characterized in that it comprises successively a suction tube (4) on the path of the intake air flow (12), an inner space (21) of the tight bag (20), an additional filter means (25) and a filter (2a) associated with the suction system (2). An additional filter means (25) for use in a vacuum cleaner, characterized in that it comprises at least two layers (30, 31) permeable to the intake air (12). An additional filter means (25) according to claim 15, characterized in that the layer (30) through which the intake air flow (12) passes first is thicker than the layer (31) through which the air flow passes thereafter. A supplementary filter means (25) according to claim 15 or 16, characterized in that at least one of the two layers (30, 31) is a hydrophobic material. An additional filter means (25) according to at least one of claims 15 to 18 17, characterized in that at least one of the two layers (30, 31) is electrically charged. An additional filter means (25) according to at least one of claims 15 to 19 18, characterized in that it comprises an adhesive part (25a) intended to be attached to a tight bag (20) for receiving dirt. Complementary filter means (25) according to at least one of Claims 15 to 18, characterized in that it is washable and reusable. A leakproof bag (20) for use in a vacuum cleaner with supplementary filter means (25), characterized in that it comprises an adhesive portion (25a) for attaching said supplementary filter means. 3Π Q15 / R Use of a tight bag (20) associated with an additional filter means (25) and adhesive means in a vacuum cleaner comprising a pot (3) and a filter (2a) for cleaning the intake air stream (12) by placing it in a pot ( 3) the sealing bag (20), the additional filter means (25) and the tight bag (20) are joined together by means of adhesive means, cleaning or cleaning processes are performed, and the assembly of said additional filter means (25) and the tight bag (20) is removed. ) that were linked to each other.