TW201729743A - Back-flushable air filter and vacuum cleaner with back-flushable air filter wherein the air filter is provided with a filter interior defined by a filter wall for receiving suction material - Google Patents

Abstract

The invention relates to a back-flushable air filter (1), which is arranged in a suction chamber (3) of a vacuum cleaner (2). In order to realize an optimal regeneration for the air filter (1), the air filter (1) of the invention is provided with a filter interior (4) defined by a filter wall (5) for receiving suction material. In addition, the invention also relates to a vacuum cleaner (2) with a back-flushable air filter (1).

Description

Backwashable air filter and vacuum cleaner with backwashable air filter

The present invention relates to a backwashable air filter that can be placed in a vacuum cleaner.

Furthermore, the present invention relates to a vacuum cleaner having a backwashable air filter, and a vacuum cleaner having a chamber to be sucked, a fan and a backwashable air filter, wherein the air filter is to be sucked The chamber is separate from the clean air chamber, and wherein during the filtering operation, the air to be cleaned passes through the air filter from the direction of the chamber to be cleaned toward the clean air chamber, and wherein during the regeneration operation, the air is flushed from the clean air chamber The direction passes through the air filter in the direction of the chamber to be sucked.

In the prior art, backwashable air filters and vacuum cleaners with backwashable air filters are known. Backwashable air filters are also commonly referred to as permanent filters. Such an air filter can in principle be operated inside the vacuum cleaner for a longer period of time and, during the regeneration operation, the attached suction material is removed and the filtration operation can be carried out again.

This type of air filter is used in combination with a vacuum cleaner to prevent the fan of the vacuum cleaner from being covered by the object to be sucked. The so-called object to be sucked mainly refers to dust and dirt. During the filtration operation of the vacuum cleaner, the air filter is typically continuously covered, so as the working time of the vacuum cleaner increases, the air filter needs to be flushed back to maintain the desired cleaning efficiency of the vacuum cleaner.

The publication EP 2 979 602 A1, for example, discloses a vacuum cleaner constructed as a hand-held rechargeable vacuum cleaner with a backwashable air filter. During the filtration operation of the vacuum cleaner, the air to be cleaned flows from the outside to the circumferential surface of the backwashable air filter. The air that is removed from the object to be sucked enters the inside of the air filter from there and reaches the fan of the vacuum cleaner. The object to be sucked is intercepted on the circumferential surface of the air filter located inside the chamber to be sucked of the vacuum cleaner. When a regenerative operation is required, the vacuum cleaner is connected to the second cleaner, for example, with its suction port, which sucks in dust and dirt. In the meantime, the air flow flushes the air filter that can be backwashed in the opposite direction, that is, from the inside to the outside, so that the object to be sucked attached to the circumferential surface of the filter can be removed, and the other items contained in the chamber to be sucked are The suction is transferred to the second vacuum cleaner together.

In order to be able to remove the object to be sucked on the circumferential surface of the air filter during the regeneration operation, it is necessary to provide a sufficient gap between the wall portion of the chamber to be sucked and the peripheral surface of the air filter so that there is no such thing as a clamp inside the chamber to be sucked. Hold the narrow part of the coarse material.

Therefore, based on the above prior art, it is an object of the present invention to provide a backwashable air filter, and a vacuum cleaner having a backwashable air filter, which is usable even inside the cleaner. The optimal regeneration of the air filter can also be achieved with a small space.

In order to achieve the above object, the present invention first proposes a backwashable air filter which can be provided in a vacuum cleaner having a filter cavity defined by a wall of the filter to accommodate a substance to be sucked.

In accordance with the present invention, the air filter has a filter cavity that provides a free volume that is configured to receive the object to be smoked during the filtering operation. Therefore, this air filter is adapted to circulate from the inside out during the filtration operation and during the regeneration operation Flush air is applied from the outside to the inside. Wherein, the filter inner cavity of the air filter is defined by the filter wall of the air filter itself, preferably by the filter active material of the air filter. To form the filter lumen, the air filter has at least one shape that protrudes from a plane to form a volume for receiving dust. Since the filter chamber of the backwashable air filter thus forms a partition of the suction chamber of the vacuum cleaner, the object to be sucked is only located inside the air filter, or is located inside the wall of the chamber to be sucked. In such a way that the outside of the air filter, for example on its circumference, there is no object to be adsorbed, and thus there is no stenosis which would hold the coarse material. Specifically, the surrounding environment of the air filter, that is, the circumferential surface thereof, is completely subordinate to the clean air chamber, so that the gap between the air filter and the wall portion of the object to be sucked chamber accommodating the air filter is minimized. The flow cross section only needs to meet lower requirements.

The invention further provides that the filter interior can be unobstructed to be connected to the suction chamber of the vacuum cleaner in the cross-sectional area of the air filter that intersects the filter wall. Accordingly, the filter interior of the air filter preferably has a connection zone that can be connected to the chamber to be sorbed of the vacuum cleaner without a flow barrier or the like. Wherein the filter lumen is advantageously connected to the chamber to be sorbed by an open cross section oriented perpendicular to the longitudinal extension of the air filter. Among other things, the direction of the longitudinal extension of the air filter can be particularly advantageously also the main direction in the air filter during the regeneration operation. The above-mentioned barrier-free connectability has the beneficial effect that it also contributes to establishing a shape-corresponding connection between the wall of the filter interior of the air filter and the chamber to be sucked of the vacuum cleaner.

In particular, the invention proposes that the main part of the air filter is oriented such that the wall of the filter does not have an undercut. This simplifies the regeneration of the inner cavity of the filter because the material to be sucked from the inner wall of the filter attached to the inner cavity of the filter is During the raw operation, the filter can be unobstructed along the main body toward the filter cavity of the air filter, and the object to be sucked does not adhere firmly to the undercut of the air filter. Such undercuts may, for example, be inwardly projecting projections on the filter wall of the filter interior or as a shape in which the filter lumen tapers along the main flow during the regeneration operation, for example, an air filter The cross-sectional area in which the main flow direction becomes smaller during the regeneration operation.

The invention further provides that the air filter is cylindrical or frustoconical, wherein the main direction of the air filter is parallel to the longitudinal axis of its cylinder or frustum. The volume of the cylinder or frustum forms part of the filter chamber or the chamber of the vacuum cleaner to be sucked. The side of the cylinder or truncated cone forms the circumferential surface of the air filter that is penetrated by the air. This technical solution advantageously provides the air filter with an internal volume for accommodating the object to be sorbed. Further, the air filter is disposed symmetrically with respect to the longitudinal axis thereof, so that the airflow can uniformly flow to the circumferential surface of the air filter, and the size of the surface to which the airflow is applied can be easily changed. Wherein the base surface of the cylinder or the truncated cone forms a cross section of the air filter intersecting the wall of the filter, if the cross-sectional area of the connection region of the suction chamber of the vacuum cleaner is larger than the base surface of the cylinder or the frustum And the cross-sectional shapes correspond to each other, for example, respectively, such that they do not overlap in a plane perpendicular to the longitudinal axis of the cylinder or the frustum, the cross-section can be unobstructed to be connected to the vacuum cleaner Suction room.

The invention proposes that at least one circumferential section of the wall of the filter has a filter active material. The filter active material may preferably be a filter web capable of filtering fine dust from the inhaled air. The filter material forms at least one circumferential zone of the filter wall or preferably also the entire filter wall to provide as large an effective filtration surface as possible during the filtration operation.

The invention further proposes that additional coarse particles are provided in the inner cavity of the filter Material filter. This coarse particulate filter may specifically correspond to the filter active material of this air filter. The coarse particle filter prevents the object to be sucked from being caught inside the wall of the filter, and in particular prevents the object to be sucked from being caught by the wrinkles or pores of the filter active material. Folded filter active materials, in particular, can occur when coarse particles are trapped inside the filter active material, thereby substantially reducing the filtration effect of the air filter during the filtration operation and also the regeneration effect during the regeneration operation. The coarse-grained material filter intercepts the coarse-grained material flowing into the inner cavity of the filter so that the coarse-grained material cannot reach the wall of the filter at all. Wherein the coarse-grained material filter is disposed at a short distance from the filter active material, for example, a few millimeters or a few centimeters apart, and is disposed in an area of the air filter for connecting to the object to be suctioned chamber of the vacuum cleaner, so that The particulate matter cannot enter the filter cavity at all. The coarse particle filter may, for example, have a grid or mesh having a mesh width of, for example, half a millimeter to several millimeters.

In particular, the invention proposes that the coarse-grain filter is arranged at a distance of at most 5 mm from the filter active material. In this technical solution, the filter cavity inside the air filter is used for accommodating fine particles and for accommodating coarse particles, wherein the coarse particles are close to the filter wall but are not in contact with the filter activity. The material, thereby preventing the coarse particles from getting stuck in the filter active material, so that the flow path during the filtration operation and the regeneration operation can be kept smooth.

In addition to the aforementioned backwashable air filter, the present invention also provides a vacuum cleaner having the backwashable air filter, the vacuum cleaner having one or more of the foregoing features. Accordingly, the features described above in connection with the air filter also apply to a vacuum cleaner having the air filter.

Furthermore, the present invention further provides a vacuum cleaner having a chamber to be sucked, a fan and a backwashable air filter, in particular an air filter of the aforementioned type, The air filter separates the chamber to be cleaned from the clean air chamber, wherein during the filtering operation, the air to be cleaned passes through the air filter from the direction of the chamber to be cleaned toward the clean air chamber, and wherein during the regeneration operation The flushing air passes through the air filter from the direction of the clean air chamber toward the object to be sucked, wherein the air filter forms at least one partial volume of the object to be sucked to accommodate the object to be sucked.

According to the invention, the air filter itself is part of the vacuum cleaner's chamber for holding the object to be sorbed. Wherein, if the air filter does not form only one partial volume of the chamber to be sucked, the entire chamber to be sucked is formed. Therefore, unlike the prior art, the object to be sucked is not deposited on the outside of the air filter, but is deposited inside the air filter, wherein the air filter can be reduced between the air filter and the wall of the clean air chamber. The distance required for good regeneration. Overall, this also reduces the structural space of the entire vacuum cleaner. During the regeneration operation, the situation in which coarse particles are stuck on the outer side of the filter wall does not occur. Specifically, the to-be-absorbed material collected in the air filter is removed from the inside of the air filter.

According to the invention, the filter chamber of the air filter has a capacity of at least 100 ml and at most 500 ml. Wherein, the capacity of the air filter is beneficially added to the capacity of the other volume partitions of the vacuum cleaner to be sucked into the chamber, so that when the total capacity of the vacuum cleaner is, for example, 1000 ml, 500 ml can be provided by the filter chamber of the air filter. 500 ml may be provided by another partition of the chamber to be sucked adjacent to the air filter.

Although the invention is particularly advantageous here for hand-held rechargeable vacuum cleaners that should not exceed the maximum construction space of the vacuum cleaner, the invention is also applicable to other vacuum cleaners and/or combined suction wiper devices. Furthermore, the present invention can be applied to both a hand-held vacuum cleaner and a vacuum cleaner that can automatically move, for example, a cleaning robot.

The invention is explained in detail below in conjunction with the examples.

1‧‧‧Air filter

2‧‧‧ vacuum cleaner

3‧‧‧Sucking room

4‧‧‧Filter inner cavity

5‧‧‧Filter wall

6‧‧‧Filter active materials

7‧‧‧ coarse particle filter

8‧‧‧fan

9‧‧‧Clean air room

10‧‧‧ suction port

11‧‧‧Motor

12‧‧‧ switch

13‧‧‧Hands

14‧‧‧Closed components

15‧‧‧Base

16‧‧‧Empty mouth

17‧‧‧ (air filter) (small) cross-sectional area

18‧‧‧ (air filter) (large) cross-sectional area

19‧‧‧ collection room

20‧‧‧ (empty port) cross-sectional area

21‧‧‧ collection room opening

Figure 1 is a perspective view of the exterior of the vacuum cleaner; Figure 2 is a longitudinal sectional view of the partition of the vacuum cleaner during the filtering operation; Figure 3 is a schematic view of the partition of the vacuum cleaner shown in Figure 2 during the regeneration operation; Figure 4 is a vertical view of the air filter 5 is a schematic view of a partition of a vacuum cleaner according to another embodiment; FIG. 6 is a schematic view of a partition shown in FIG. 5 during a reproducing operation; and FIG. 7 is a plan view of the partition shown in FIG.

Figure 1 shows a vacuum cleaner 2, here constructed as a hand-held rechargeable vacuum cleaner. The vacuum cleaner has a housing having a handle 13 for a user to hold and manipulate the vacuum cleaner 2 by hand. The handle 13 is provided with a switch 12 for turning the motor 11 on and off. The motor 11 drives the fan 8 of the cleaner 2 . The housing of the vacuum cleaner 2 is further provided with a suction port 10 through which the fan 8 can suck the object to be sucked and the air into the vacuum cleaner 2. Furthermore, the vacuum cleaner 2 has a to-be-absorbed chamber 3 containing an air filter 1, which is a regenerable permanent filter. The air filter 1 separates the object to be suction chamber 3 of the cleaner 2 from the clean air chamber 9. The filter chamber 4 of the air filter 1 simultaneously forms a partition of the chamber 3 to be sucked by the cleaner 2.

During the conventional filtering operation of the vacuum cleaner 2, the fan 8 sucks the air and the object to be sucked into the object to be sucked chamber 3 of the vacuum cleaner 2 through the suction port 10 formed on the casing, and also sucks into the filter cavity of the air filter 1 4. The inhaled absorbent is left in the filter interior 4 of the air filter 1 or inside the chamber 3 to be sucked, and only the clear The clean air can pass through the filter wall 5 of the air filter 1, i.e., through the filter active material 6 disposed thereon, into the clean air chamber 9 and reach the fan 8.

During the filtering operation, the object to be sucked is continuously deposited on the filter active material 6 of the filter wall 5, so that it is necessary to regenerate the air filter 1 from time to time to maintain the desired cleaning effect of the cleaner 2. During the regeneration operation, for example, the fan 8 of the cleaner 2 is operated in the opposite direction, so that the flushing air from the fan 8 filters the active material from the outside through the air filter 1, and enters the entire interior of the filter chamber 4 and the vacuum cleaner 2 The chamber 3 is further blown to the suction port 10 from there. Thereby, the entire suction chamber 3 of the filter wall portion 5, the air filter 1, and the cleaner 2 is cleaned.

Figure 2 shows the vacuum cleaner 2 in a partially cutaway state. Here, the filtering operation of the cleaner 2 is shown. The illustrated air filter 1 is cylindrical here, wherein the filter wall 5 has a filter active material 6 and forms the circumferential surface of the air filter 1. The air filter 1 separates the chamber 3 to be cleaned, which is also partially formed by the filter chamber 4 of the air filter 1, from the clean air chamber 9. Further, the to-be-primed chamber 3 has a partition provided outside the air filter 1. The suction chamber 3 has a cross-sectional area of the same size inside the air filter 1 and outside the air filter 1, i.e., the chamber 3 to be formed here forms a cylinder having a constant cross-sectional area with a uniform longitudinal extent. The suction chamber 3 has a closure element 14 which is here constructed as a flip element and which, during the illustrated filtering operation, is transferred into the chamber 3 based on the negative pressure generated by the fan 8, so that the air and the substance to be sucked can be self-contained. The suction port 10 enters the chamber 3 to be sucked.

During the filtering operation shown in Fig. 2, the cleaner 2 is traversed by the air flow, and the flow direction of the air flow is indicated by an arrow in the drawing. First, the air carrying the object to be sucked enters the vacuum cleaner 2 through the suction port 10, and passes through the opened closing member 14 to enter the filter chamber 3 and the filter inner chamber 4 of the air filter 1. The object to be sucked is attached to the air filter there. The filter wall 5 of the filter wall 1 of 1 is filtered. Only the air to be purged from the filter inner chamber 4 passes through the filter active material 6 of the filter wall portion 5, and flows into the clean air chamber 9 of the cleaner 2. The air then reaches the fan 8 of the vacuum cleaner 2 from there.

Figure 3 shows the partition of the cleaner 2 as shown in Figure 2 during the regeneration operation. Here, the cleaner 2 is preferably connected by its suction port 10 to a collection container (not shown) such as a base or another vacuum cleaner. As indicated by the arrows in the figure, during the regeneration operation, the flushing air flows through the cleaner 2 in a direction opposite to the filtering operation. Among them, the airflow for the regeneration operation can be generated by the fan of the external cleaner or the fan connected to the base of the cleaner 2, if it is not generated by the fan 8 of the vacuum cleaner 2. The flushing air flows into the air filter 1 inside the clean air chamber 9, wherein the flushing air is applied to the filter wall portion 5 of the air filter 1 from the outside to the inside. In the meantime, the flushing air penetrates the filter active material 6 and enters the filter cavity 4 of the air filter 1. Wherein, the object to be sucked from the inside of the filter wall 5 is detached, and passes through the open closing member 14 together with the other objects to be sucked collected in the filter chamber 4 or the chamber 3 to be sucked toward the suction port of the cleaner 2 The direction of 10 is discharged.

Finally, Figure 4 shows an air filter 1 provided by a special technical solution. In this solution, the air filter 1 has a coarse particle filter 7 in the filter interior 4 which is arranged substantially parallel to the filter active material 6 of the filter wall 5 such that inflow filtration The air in the inner chamber 4 must first penetrate the coarse particle filter 7 to reach the filter active material 6. The mesh width of the coarse particle filter 7 is larger than the mesh width of the filter active material 6 of the filter wall 5. By way of example, the coarse particle filter 7 has a grid width of 3 mm. This grid width is suitable for filtering coarse particles such as plant debris, pebbles, and objects to be sucked over 3 mm in size. Thus, only the air carrying the fine particulate matter can reach the filter active material 6 of the air filter 1, and the so-called fine particulate matter refers to the fine dust smaller than the mesh width of the coarse particulate matter filter 7. Thereby, the coarse substance is prevented from being caught inside the filter active material 6 of the filter wall portion 5. During the regeneration operation, the coarse material adhering to the coarse particle filter 7 is discharged to the air filter 1 or the suction chamber 3 of the cleaner 2 in the opposite direction to the filtering operation.

Figures 5 to 7 show another embodiment of a vacuum cleaner 2 with a backwashable air filter 1. These figures respectively show longitudinal sections of the vacuum cleaner 2 having a section of the chamber 3 to be sucked when the chamber 3 is not connected (Fig. 5) or connected to the base 15 (Fig. 6).

An air filter 1 is provided in the chamber 3 to be sucked, and here a three-dimensional air filter 1 is constructed. The air filter 1 has a filter wall 5 having a filter active material 6 for filtering the air carrying the substance to be sucked during the suction operation of the cleaner 2. The air filter 1 expands in the direction of the emptying opening 16 of the chamber 3, wherein a line connecting the air filter 1 to the emptying port 16 defines the emptying direction of the chamber 3 to be sucked.

The air filter 1 has several possible cross-sectional areas 17, 18 in the emptying direction, wherein for the purposes of the present invention, the cross-sectional area 17 on the smaller end face of the air filter 1 and the larger end face of the air filter 1 The upper cross-sectional area 18 is particularly important. The air filter 1 is here, for example, a fine filter, wherein an additional coarse substance filter can also be provided in combination, and the coarse substance filter is arranged in the air filter 1 in the direction from the emptying port 16 to the fan 8. front. This coarse particle filter can be constructed, for example, as a flat filter.

The chamber 3 to be suctioned is constructed such that the air filter 1 expands in the emptying direction, and the chamber 3 to be sucked from the larger cross-sectional area 18 of the air filter 1 Up to the emptying port 16, there is only a constant cross-sectional area. As an additional option, the chamber 3 can also extend from the cross-sectional area 18 towards the emptying opening 16.

According to FIG. 6, during the regeneration of the chamber 3 to be sucked, the collection chamber 19 of the susceptor 15 is connected to the rinsing port 16. The cross-sectional area 20 of the emptying port 16 is smaller than the collecting chamber opening 21. During the regeneration operation, the cleaner 2 is arranged parallel to the gravitational force acting on the object to be sucked above the susceptor 15. To this end, the cleaner 2 and the base 15 correspond to each other such that the cleaner 2 can only be held in the base 15 in order to achieve a normal regeneration operation, i.e., the emptying direction is parallel to the gravitational orientation. As such, in the example shown here, the air filter 1 and the emptying port 16 are also arranged one above the other.

Fig. 7 shows a plan view of the chamber to be sucked with the cross-sectional area 17 of the air filter 1 starting from the plane shown in Fig. 6. Viewed in the direction of emptying, the perimeter line of the cross-sectional areas 17, 18 of the air filter 1 and the perimeter line of the cross-sectional area 20 of the emptied opening 16 are concentrically arranged. The cross-sectional areas 17, 18, 20 are geometrically circular, respectively, so that the associated perimeter lines respectively describe a circle of different diameters. Among them, the circumference line with the smallest diameter corresponds to the cross-sectional area 17 of the smaller end surface of the air filter 1. The radially outwardly nearest perimeter line corresponds to the cross-sectional area 18 of the larger end face of the air filter 1. Finally, the largest diameter perimeter line belongs to the cross-sectional area 20 of the emptiness port 16. Since the cross-sectional areas 17, 18, 20 become larger in the emptying direction, and the perimeter lines 5 are respectively circular (and concentrically arranged), the perimeter lines do not intersect in the clearing direction. In this way, there is no undercut in the emptying direction, that is, the inside of the object to be sucked chamber 3 is available for the deposition surface to be adsorbed.

The technical principle of the present invention is as follows: during the suction operation of the cleaner 2, first, the object to be cleaned is sent to the object to be cleaned by the fan 8 of the cleaner 2 Suction chamber 3. In the meantime, the object to be adsorbed is deposited on the air filter 1, in particular on the filter active material 6, and also in the remaining area of the chamber 3 to be sucked. In order to regenerate the chamber 3 to be sucked, the user of the cleaner 2 connects the cleaner 2 to the base 15, wherein the emptying port 16 of the chamber 3 to be connected is connected to the collecting chamber opening 21 of the collecting chamber 19. For this purpose, the suction nozzle provided on the chamber 3 to be sucked is removed in advance.

During the regeneration operation, the direction of operation of the fan 8 of the cleaner 2 is opposite to that used for the suction operation, so that the fan 8 generates a flow of air that enters the chamber 3 through the air filter 1 and delivers the deposited object to the base. Block 15. During the regeneration operation, the fan 8 operates at a power of, for example, 400 watts, which is higher than the power (e.g., 300 watts) used by the fan 8 during the pumping operation.

The air flow generated by the fan 8 is applied to the air filter 1 on the side opposite to the filter active material 6, which side faces the fan 8. The air stream passes through the material of the air filter 1 and, during this process, the object to be adsorbed deposited on the filter active material 6 is detached, whereby the object to be sucked further enters the object to be sucked chamber 3 in the emptying direction, and thus also toward the emptying port 16 The direction and the collection chamber 19 of the base 15 move in the direction. Thereby, the desired regeneration of the object to be sucked chamber 3 can be achieved.

Although the present invention exemplarily discloses only a specific arrangement of the air filter 1 and the emptying port 16 inside the chamber 3 to be sucked, only the circular cross-sectional area 17 and 18 of the air filter 1 and the emptying port 16 are disclosed. 20, however, the vacuum cleaner 2, in particular the chamber 3 to be sucked, can also be constructed in many other ways. For example, the cross-sectional areas 17, 18, 20 may differ from one another in geometry and size. In addition, the perimeter lines of the cross-sectional areas 17, 18, 20 may also intersect along the emptying direction, wherein the first cross-sectional area 17, 18, 20 in the emptying direction protrudes from the latter cross-sectional area 17, The amplitude of 18 and 20 should not exceed 5 mm. For example, air filter 1 and/or to be sucked The chamber 3 can also be tapered in the emptying direction. The only point is that the present invention does not allow for the formation of a noteable adhering surface of the object to be adsorbed during the regeneration operation, thereby ensuring optimal emptying of the chamber 3 to be sucked.

In addition, the following embodiments may be employed, that is, the emptying direction is not parallel to the gravitational force, or the air filter 1 and the emptying port 16 are not arranged parallel to the longitudinal extension of the object to be sucked chamber 3, but are, for example, relatively biased. The angles that are not equal to zero degrees are set so that the surface normals of the cross-sectional areas 17, 18, 20 intersect.

The regeneration operation can also vary based on the fan 8 used. As an alternative to the self-owned fan 8 of the vacuum cleaner 2, for example, a fan of the susceptor 15 can be used for regeneration. Further, as an alternative to blowing the object to be sucked out of the object to be sucked chamber 3, the object to be sucked may be sucked out of the object to be sucked chamber 3.

1‧‧‧Air filter

2‧‧‧ vacuum cleaner

3‧‧‧Sucking room

4‧‧‧Filter inner cavity

5‧‧‧Filter wall

6‧‧‧Filter active materials

8‧‧‧fan

9‧‧‧Clean air room

12‧‧‧ switch

14‧‧‧Closed components

Claims (9)

A backwashable air filter can be provided in the vacuum cleaner (2), characterized in that the air filter (1) has a filter cavity (4) defined by the filter wall (5), To accommodate the object to be sucked. The backwashable air filter of claim 1, wherein the filter inner chamber (4) is in a cross-sectional area of the air filter (1) intersecting the filter wall portion (5) It is connected to the suction chamber (3) of the vacuum cleaner (2) without any trouble. A backwashable air filter according to claim 1 or 2, wherein the filter wall (5) does not have an undercut as viewed from the main flow in the air filter (1). A backwashable air filter according to any of the preceding claims, wherein the air filter (1) is cylindrical or frustoconical, and wherein the main direction of the air filter (1) It is parallel to the longitudinal axis of its cylinder or frustum. A backwashable air filter according to claim 4, wherein at least one of the circumferential sections of the filter wall (5) has a filter active material (6). A backwashable air filter according to any of the preceding claims, wherein an additional coarse particulate filter (7) is provided in the filter interior (4), which in particular corresponds to this air The filter (1) is filtered with an active material (6). A backwashable air filter according to claim 6, wherein the coarse particle filter (7) is arranged at a distance of at most 5 mm from the filter active material (6). A vacuum cleaner having a backwashable air filter (1) according to any of the preceding claims. A vacuum cleaner, in particular a vacuum cleaner (2) according to claim 8, having a chamber to be sucked (3) a fan (8) and a backwashable air filter (1), wherein the air filter (1) separates the chamber (3) from the clean air chamber (9), wherein During the filtering operation, air to be cleaned passes through the air filter (1) from the direction of the chamber (3) toward the clean air chamber (9), and wherein the flushing air is cleaned during the regeneration operation The air chamber (9) passes through the air filter (1) in the direction of the object to be sucked chamber (3), characterized in that the air filter (1) forms at least one of the objects to be sucked (3) The sub-volume of the object to be sucked.