TW201815339A - Vacuum cleaner with a filter element - Google Patents

Abstract

The invention relates to a vacuum cleaner (1) with a filter element (4) separating a clean air space (2) from a suction chamber (3), which flows in a filter operation of air to be cleaned from the direction of the suction chamber (3) in the direction of the clean air space (2) is flowed through and in a regeneration operation of a clean air flow from the direction of the clean air space (2) in the direction of the suction chamber (3) to solve at the suction chamber (3) side facing the filter element (4) suction. In order to be able to produce a vacuum cleaner (1) with the smallest possible installation space, it is proposed that the filter element (4) forms at least one suction material receiving partial volume of the suction chamber (2), and the filter element (4) within the clean air space (2) an air distribution device (5) is assigned, which is designed to direct a clean air flow varying in time to different subregions of the filter element (4).

Description

   Vacuum cleaner with filter element   

The invention relates to a vacuum cleaner, in particular to a handheld rechargeable vacuum cleaner, having a filter element for separating a clean air chamber from an object to be sucked, which is cleaned by the air to be cleaned from the direction of the object to be sucked during the filtering operation. The air chamber flows through, and in the regeneration operation, the clean air current flows from the direction of the clean air chamber toward the object to be sucked, so as to separate the object to be sucked on the side of the filter element facing the object to be sucked.

The present invention also relates to a method for operating a vacuum cleaner, wherein, in a filtering operation, the air to be cleaned flows from the direction of the room to be cleaned toward the clean air room through a filter element separating the clean air room from the room to be cleaned, and, In the regeneration operation, the clean airflow is passed through the filter element from the direction of the clean air chamber toward the object to be sucked, so as to separate the object to be sucked on the side of the filter element facing the object to be sucked.

Vacuum cleaners with filter elements of the aforementioned type have been disclosed in the prior art. These filter elements are often referred to as backwashable air filters or permanent filters. These filter elements can, in principle, remain in the vacuum cleaner for a long time, and the accumulated to-be-absorbed matter is removed during the regeneration operation, so that they can be reused for the filtration operation thereafter.

In the case of a vacuum cleaner, these filter elements are used to protect the fan of the vacuum cleaner from dust or dirt. During the filtering operation of the vacuum cleaner, the filter element is usually gradually occupied by dust. Therefore, as the working time of the vacuum cleaner increases, it is necessary to backwash the filter element at a certain time interval to achieve the desired cleaning effect of the vacuum cleaner.

The publication EP 2 979 602 A1 discloses, for example, a vacuum cleaner designed as a hand-held rechargeable vacuum cleaner having a backwashable air filter. During the filtering operation of the vacuum cleaner, the air to be cleaned flows from the outside to above the peripheral surface of the reversible air filter. From there, the air from which the object is to be sucked enters the inside of the filter and reaches the fan of the vacuum cleaner. For the regeneration operation, for example, the vacuum cleaner is connected to the second vacuum cleaner through its suction nozzle, and the dust or dirt contained in the object to be sucked is sucked into the second vacuum cleaner. Wherein, the reversible air filter is backwashed through the airflow in the opposite direction, that is, from the inside to the outside, so as to remove the to-be-absorbed material accumulated on the peripheral surface of the filter and follow it with other The objects to be suctioned are transferred to the second vacuum cleaner together. A rotary cleaning nozzle is provided in the air filter, which is passed by the clean air flow during the regeneration operation, and clean air is applied to the air filter from the side of the clean air chamber.

The backwashable filter is set in the object to be sucked, so the object to be sucked is applied to the filter from the outside. In order to be able to discharge the object to be sucked from the peripheral surface of the filter during the regeneration operation, it is necessary to leave sufficient free space between the wall portion of the object to be sucked and the peripheral surface of the filter, so as to avoid the generation of narrow spaces that may be caught by coarse particles. Parts.

Although this structure has been verified in the prior art, it still requires a certain size of the object to be sucked and the vacuum cleaner.

Based on the foregoing prior art, it is an object of the present invention to provide an alternative embodiment of a vacuum cleaner, which is optimized in particular with regard to the required installation space.

In order to achieve the above object, the present invention proposes that the filter element is constituted as at least one part of the volume of the object to be sucked in which the object to be sucked is accommodated, and corresponding to the filter element, an air distribution device is provided in the clean air chamber, which is suitable for The time-varying way deflects the clean air flow to different zones of the filter element.

According to the present invention, the filter element itself is a part of the to-be-absorbed chamber for containing the to-be-absorbed object. Therefore, the filter element is constructed as a to-be-suction chamber, wherein the filter element is either constituted only as a part of the volume of the to-be-suction chamber or as a complete to-be-suction chamber. Therefore, unlike the prior art, the object to be sucked is no longer accumulated on the outside of the filter element, but is instead accumulated in the filter element, so that the filter element and the filter cavity containing the filter element required for optimal regeneration of the filter element can be collected. The spacing between the inner walls is reduced. Overall, this also reduces the structural space of the vacuum cleaner. Especially during regeneration, coarse particles do not become wedged between the outside of the filter element and the inner wall of the cavity. Specifically, the to-be-absorbed matter collected in the filter element is removed from the filter element from the inside. At the same time, there is no longer a rotating nozzle in the filter element, so that the internal volume of the filter element is completely used as a part of the volume of the to-be-absorbed chamber for containing the to-be-absorbed object. According to the present invention, on one side of the clean air chamber, that is, outside the filter element, an air distribution device is provided which deflects the clean air flow to the outside of the filter element during the regeneration operation. During the filtering operation, the entire receiving volume of the filter element is available for throughflow. This prevents pressure loss.

The air distribution device of the present invention assumes the function of a rotating nozzle known in the prior art, so that it can apply clean air to different sections of the filter element in a time-varying manner. The air distribution device is located in the clean air room and does not contact the object to be sucked, so that it will not interfere with the optimal function. The clean air flows through the filter element from the outside to the inside, so that the object to be sucked up collected in the filter element can be removed from the filter element or the filter cavity. In particular, it is proposed that the object to be sucked on the stroke removed from the filter element and / or the filter cavity, or only passes through the constant flow cross section, or passes through the widened flow cross section, especially in the regeneration direction, so that Undercuts are created that can accumulate to-be-absorbed substances and may have a negative effect on regeneration results.

The air distribution device is adapted to deflect the clean airflow to different sections of the filter element in a time-varying manner. Therefore, during the first time point, clean air is applied to the sections of the filter element that are different from the second time point. The flow cross-section of the clean air flow is reduced because it only flows to one zone, which in turn increases the air flow speed. As a result, the regeneration effect is enhanced, so that even particles such as material embedded in the filter element can be optimally removed.

The invention particularly proposes that the filter element is substantially cylindrical or truncated cone, wherein the volume of the cylinder or truncated cone is a part of the chamber to be sucked, and wherein the side of the cylinder or truncated cone has a filter Partition of the component to which clean air is applied. With this design solution, the inner volume of the filter element for accommodating the object to be sucked is advantageously realized. In addition, the filter element is also symmetrical with respect to its longitudinal axis, so that the airflow can evenly flow to the side of the filter element, and the size of the surface to which it is directed can also be optimized.

The invention particularly proposes that the air distribution device is movable relative to the filter element. As a result, the air distribution device or at least one section of the air distribution device can be moved, for example, relative to the peripheral surface of the cylindrical or truncated cone filter element, so that clean air can flow to the entire periphery of the filter element, which includes the difference to the filter element. The zones are cleaned successively and, as a whole, a complete regeneration of the filter element is achieved. The motion of the air distribution device may include rotational and / or translational motion. Alternatively, the filter element may be movable relative to the air distribution device, although it is difficult to manufacture. It is also possible to adopt an embodiment in which the air distribution device and the filter element are fixedly arranged relative to each other, but the air distribution device has movable elements, such as a controllable valve or the like, and these elements respectively open specific The flow path further regenerates only a specific section of the filter element. However, this solution requires motor control of the opening element, so depending on the situation, the cost and installation difficulty of the vacuum cleaner increase.

The present invention particularly proposes an embodiment in which the air distribution device is supported on the filter element in a manner rotatable about a rotation axis, and has at least one clean air outlet. The surface normal of the opening plane is not in line with The radial axis of the rotary shaft corresponds to the clean air outlet and / or the clean air outlet is arranged and / or constructed so that the clean air flowing out through the clean air outlet does not follow the radial direction of the clean air outlet. According to this design, the air distribution device is rotatable relative to the filter element. The air distribution device can be constructed so that it can rotate around its axis of rotation without the assistance of a motor. For this purpose, the air distribution device is constructed with respect to its axis of rotation, so that a torque acts on the air distribution device in the circumferential direction, thereby producing the desired rotation with respect to the filter element. This can be achieved by the (or) clean air openings not pointing radially with respect to the axis of rotation of the air distribution device. During the rotation around the rotation axis, the air distribution device is preferably swept along different sections of the filter element, so that clean air is successively applied to these sections, and then the filter element is completely regenerated. However, as an alternative to driving the air distribution device by applying air, a torque may also be applied to the air distribution device by a motor. The motor may be, for example, a fan motor of a vacuum cleaner.

The invention also proposes that the air distribution device has a distributor housing containing a distributor cavity that provides a volume of air. Therefore, the air distribution device adopts a three-dimensional design, in which a distributor cavity is provided inside the air distribution device, and clean air can be guided in the distribution cavity. The distributor housing of the air distribution device has the aforementioned at least one clean air outlet for the clean air to leave the distributor cavity again. Preferably, the shape and size of the distributor cavity can be adjusted according to the structural conditions of the clean air chamber of the vacuum cleaner, especially to assist the on-off operation of the flow path.

The invention proposes that: between the air distribution device and the filter element, especially between the air distribution device and the peripheral surface of the filter element with effective filtering material, there are provided a plurality of distributor elements that provide air flow channels, which are suitable for cleaning The air flow is deflected to different zones of the filter element. Among them, the distributor elements can be provided in particular between the air distribution device and the peripheral surface of the filter element. These distributor elements are used to increase the flow rate of clean air during the flow through the corresponding distributor element. Preferably, the distributor elements are arranged circumferentially around a preferably cylindrical or frusto-conical filter element, for example in the form of ribs, walls and the like. These distributor elements divide the gap between the inner wall of the filter cavity and the outer side of the filter element into several partial volumes of the same or different sizes, which are referred to herein as air flow channels. During the usual filtering operation of the vacuum cleaner, it is preferred that all air flow channels flow through the entire peripheral surface of the filter element, as well as its gap. Only during a regeneration operation in which the direction of the air flow is reversed, the square flows through only one or a small part of these air flow channels to increase the flow velocity.

The present invention proposes that the distributor elements are connected to the air distribution device, the filter element and / or the filter cavity containing the filter element in a rotationally fixed manner. For the regeneration effect, it is in principle not important which of these elements is fixedly connected to the dispenser element. However, it is important that the air distribution device is moved relative to the filter element. The air distribution device may be moved by passing by the distributor element, or the distributor elements may be connected to the air distribution device in a rotationally fixed manner and moved by passing by the filter element. "Anti-rotation" means that in the connection scheme, the distributor element is either integrally formed with the air distribution device, the filter element and / or the filter cavity, or is connected to this element in a rotationally resistant manner, for example, by bonding Connection, snap connection, or the like.

The invention also proposes that the clean air chamber has a valve that can be switched from the filtering operation position to the regeneration operation position in a manner triggered by pressure, and vice versa, wherein, in the filtering operation position, the valve is to be lifted from the object to be sucked to The flow path across the air distribution device is released up to the fan of the vacuum cleaner, and in the regeneration operation position, the valve blocks the span flow path and realizes the flow of the air distribution device. According to this design scheme, the direction of the airflow is reversed, and the flow paths in the clean air chamber and the room to be sucked are automatically switched. During the usual filtering operation of the vacuum cleaner, the air flows through the suction nozzle of the cleaner through the filter cavity and the filter element to the fan, so its valve remains in the filtering operation position, and the sucked air does not enter after passing through the filter element An air distribution device with a larger flow resistance flows to the fan in a side-by-side manner like a bypass. During the filtering operation, the filter element is completely and as uniformly flowed by the inhaled air as possible, rather than just individual volume sections of the filter element. During the regeneration operation, the direction of the flow in the vacuum cleaner is reversed, in which the fan of the vacuum cleaner can be operated, for example, in the opposite direction, so that clean air flows from the fan of the vacuum cleaner to the suction nozzle, and is discharged into the container, Seat or the like. Alternatively, an external fan, such as a fan of another vacuum cleaner or base, may be connected to the suction nozzle and a suction airflow may be applied to the filter element from there. During the regeneration operation, the valve is operated due to the overpressure on the clean air side of the filter element, so that it can only flow into the filter element through the air distribution device. Therefore, the clean air flow is forced to pass through the air distribution device, and then only passes through one of the partitions of the filter element, and finally reaches the nozzle of the vacuum cleaner with the to-be-separated objects separated in this partition, and enters the outside. With the air distribution device, it is possible to increase the flow rate during the regeneration operation as described above, and to clean all sections of the filter element successively.

The invention particularly proposes that the valve has a valve element to which a reset force is applied, which can be moved into the filtering operation position in the direction of the reset force through the negative pressure generated on the clean air side during the filtering operation, and The overpressure generated on the clean air side during the regeneration operation is moved into the regeneration operation position in a manner opposite to the resetting force. Therefore, the position of the valve is determined by the pressure ratio between the clean air chamber and the to-be-absorbed chamber, and the reset force of the spring element stuck on the valve element. If during the regeneration operation, based on the pressure difference between the clean air chamber and the to-be-absorbed chamber, a force greater than the reset force of the spring element stuck on the valve element acts on the valve, the valve element is moved into the regeneration operation position of the valve And clean air can only flow into the filter element through the air distribution device, and no longer pass by the air distribution device. Preferably, the displaced valve element cooperates with one of the partitions of the distributor cavity so that it only releases the flow path through the air distribution device and does not pass by the air distribution device.

The invention also proposes that the filter element has a capacity of at least 100 ml and a maximum of 500 ml. The capacity of the filter element is superimposed on the capacity of the other volume partitions of the to-be-absorbed chamber, so that, for example, in the case of a total capacity of 1000 ml, 500 ml can be provided by the inner cavity of the filter element, and 500 ml can be placed by the other of the to-be-absorbed chamber next to the filter element. Partitions are provided.

Finally, in addition to the aforementioned vacuum cleaner, the present invention also proposes a method for operating a vacuum cleaner, in particular for operating the vacuum cleaner previously proposed, wherein, in the filtering operation, the air to be cleaned flows from the direction of the room to be cleaned toward the clean air chamber. A filter element that separates the clean air chamber from the object to be sucked, and in the regeneration operation, the clean air flows from the direction of the clean air chamber toward the object to be sucked through the filter element so that the filter element faces the object to be sucked. The object to be sucked is separated on one side, and during the filtering operation, the object to be sucked is collected in the receiving volume of the filter element, and during the regeneration operation, the air distribution device provided in the clean air chamber is used to follow The time-varying method deflects the clean air flow to different sections of the filter element in order to separate the objects to be sucked in the receiving volume. The resulting advantages have been described in detail in connection with a vacuum cleaner. In addition, all the features described above in connection with the vacuum cleaner are similarly applicable to this method.

Although the present invention is more advantageous for a handheld rechargeable vacuum cleaner, in which the maximum structural space of the vacuum cleaner should not be exceeded, the present invention can also be applied to other vacuum cleaners or combined suction and wiping equipment. In addition, the present invention can be applied to both a handheld vacuum cleaner and an automatic traveling vacuum cleaner. The latter can also be an automatic travelling cleaning robot in particular.

1‧‧‧Vacuum cleaner

2‧‧‧ clean air room

3‧‧‧Aspirating room

4‧‧‧Filter element

5‧‧‧air distribution device

6‧‧‧ (air distribution device) rotating shaft

7‧‧‧ clean air outlet

8‧‧‧Distributor housing

9‧‧‧Distributor cavity

10‧‧‧ (Filter element)

11‧‧‧Distributor element

12‧‧‧Filter Chamber

13‧‧‧ Valve

14‧‧‧fan

15‧‧‧ spring element

16‧‧‧ Valve element

17‧‧‧Receiving volume

18‧‧‧ Nozzle

19‧‧‧handle

20‧‧‧Switch

21‧‧‧Motor

22‧‧‧ cavity cover opening

23‧‧‧ (suction room) valve

24‧‧‧bearing

25‧‧‧Airflow channel

26‧‧‧Valve element opening

27‧‧‧ cavity cover

FIG. 1 is a perspective perspective view of the vacuum cleaner of the present invention viewed from the outside, FIG. 2 is a schematic diagram of a vacuum cleaner of a first embodiment during a filtering operation, and has partitions partially shown in cross-sectional views, and FIG. 3 is a second embodiment A longitudinal sectional view of the partition of the vacuum cleaner during the filtering operation, FIG. 4 is a sectional view of the partition of FIG. 3, and FIG. 5 is a schematic sectional view of the partition of FIG. 3 during the regeneration operation.

The present invention is described in detail below with reference to the examples. FIG. 1 shows a vacuum cleaner 1, which is here constructed as a handheld rechargeable vacuum cleaner. The vacuum cleaner 1 has a housing including a suction nozzle 18 and a handle 19, and the user can use the handle to hold the vacuum cleaner 1 in his hand and guide it. A switch 20 is provided on the handle 19 for turning the motor 21 on and off, and the motor drives the fan 14. In addition, the vacuum cleaner 1 has a filter chamber 12 containing a filter element 4 which is here constructed as a renewable permanent filter. The filter element 4 divides the filter chamber 12 into a clean air chamber 2 and an object to be sucked 3. During the usual filtering operation of the vacuum cleaner 1, the fan 14 sucks air and the object to be sucked into the object to be sucked 3 through the suction nozzle 18. The sucked object to be sucked remains in the object to be sucked chamber 3, so only the cleaned air can reach the fan 14.

During the filtering operation, the to-be-absorbed substance is continuously accumulated on the filter element 4 in the to-be-absorbed chamber 3, so it needs to be regenerated from time to time to maintain the desired suction efficiency of the vacuum cleaner 1. During the regeneration operation, for example, the fan 14 of the vacuum cleaner 1 is operated in the opposite direction, so that the air from the fan 14 is blown from the outside to the inside through the filter element 4 to the suction nozzle 18, and the collected to-be-sucked material is transported out .

FIG. 2 shows the vacuum cleaner 1 of FIG. 1, a part of which is a cross-sectional view. Starting from the suction nozzle 18, an object to be sucked 3 is first provided in the vacuum cleaner 1. This object chamber has a shutter 23 for the object to pass through and enter the object chamber 3. During the filtering operation of the vacuum cleaner 1, the shutter 23 is opened due to the negative pressure generated by the fan 14 in the object to be sucked 3, and is automatically closed when the fan 14 is not in operation to prevent the object to be sucked from the object 3 to be accidentally discharge.

The part to be sucked 3 is composed of the inner volume of the filter element 4 which is cylindrical here. The filter element 4 has an effective filter material on its peripheral surface 10, and cleaned air can flow through the material, while objects to be sucked cannot. The filter material here is, for example, a filter web. The end of the filter element 4 opposite the shutter 23 is closed and has a bearing 24 on which an air distribution device 5 is rotatably supported. The air distribution device 5 is here rotatable about a rotation axis 6.

The air distribution device 5 has a distributor housing 8 and a distributor cavity 9 defined by the distributor housing 8. The distributor housing 8 here has a clean air outlet 7 (on the left of the air distribution device 5 in FIG. 2). The clean air outlet 7 is defined to deflect the outgoing air and not to flow in a direction consistent with the radial direction of the rotation shaft 6. For this purpose, the clean air outlet 7 has an edge region which is inclined with respect to the surface normal. Next to the filter element 4 and the peripheral surface 10 of the air distribution device 5, a plurality of distributor elements 11 in the form of ribs are provided along the circumferential direction of the filter element 4 or the air distribution device 5, which connects the inner wall of the filter cavity 12 and the The free volume between the filter element 4 or the peripheral surface 10 of the air distribution device 5 is divided into a plurality of air flow channels 25.

In the clean air chamber 2, a valve 13 including a valve element 16 is provided between the air distribution device 5 and the fan 14, and the valve can be switched from the filtering operation position to the regeneration operation position. FIG. 2 shows a filtering operation position during the usual filtering operation of the vacuum cleaner 1. Among them, the valve 13 is arranged so that the valve element 16 abuts on the cavity cover 27 of the filtering chamber 12, and the air flowing through the filtering material of the filtering element 4 through the suction nozzle 18 can be positioned beside the air distribution device 5 The passing way flows to the fan 14. The air flows through the valve element opening 26 and the cavity cover opening 22 using the corresponding design scheme. The sucked-in air does not pass through the air distribution device 5 but flows only in a manner passing by it. Among them, air is applied to all the airflow channels 25 of the filter cavity 12 and the filter element 4 at the same time.

FIG. 3 shows an enlarged section of the vacuum cleaner 1 according to the second embodiment of the present invention, wherein the air distribution device 5 is supported on the filter chamber 12 by a bearing 24 different from the type shown in FIG. 2. The rest of the design is the same as in Figure 2.

FIG. 4 is a cross-sectional view of the clean air chamber 2 located above the air distribution device 5 perpendicular to the rotation axis 6. It can be seen from this that the air distribution device 5 and the filter element 4 shown below in dashed lines. The air distribution device 5 has a distributor housing 8 which provides a distributor cavity 9. In terms of cross section, the distributor housing 8 has a circular ring shape, and a clean air outlet 7 is formed on the left side in the figure. Between the distributor housing 8 and the inner wall of the filter chamber 12, a plurality of distributor elements 11 are provided, which are here spacers projecting radially outward from the rotation shaft 6. An air flow channel 25 is constructed between the distributor elements 11, and air can flow from the distributor cavity 9 through the clean air outlet 7 into these air flow channels, and is applied to the peripheral surface 10 of the filter element 4.

Finally, FIG. 5 is a schematic diagram of the partition of the vacuum cleaner 1 as shown in FIG. 3 during the regeneration operation. Among them, the valve element 16 abuts the distributor housing 8 of the air distribution device 5 in the region of the valve element opening 26, so, for example, the clean airflow from the fan 14 can only pass through the distributor cavity 9 and the clean air outlet 7 The corresponding airflow channel 25 reaches the peripheral surface 10 of the filter element 4. The valve 13 has a spring element 15 that applies a reset force to the valve element 16, and the reset force moves the valve element 16 back to the filtering operation position of the valve 13.

The working principle of the present invention is as follows: the vacuum cleaner 1 first works in a conventional filtering operation, wherein the air with the object to be sucked enters the vacuum cleaner 1 through the suction nozzle 18. The air with the object to be sucked flows into the object to be sucked chamber 3 and is deposited on the inner wall in the filter element 4 so that only the air from which the object to be sucked is removed passes between the distributor elements 11 and bypasses the air distribution device 5 Down flow to the fan 14.

During the regeneration operation, the direction of the air flowing through the vacuum cleaner 1 is reversed so that it flows here, for example, from the fan 14 toward the suction nozzle 18. Among them, an overpressure is generated in the clean air chamber 2, so that the valve element 16 is displaced in a manner opposite to the reset force of the spring element 15. The displacement of the valve element 16 continues until the valve element 16 comes into contact with the distributor housing 8 and the distributor element 11 of the air distribution device 5. Thereby, the bypass path bypassing the air distribution device 5 is closed at the same time. Therefore, starting from the fan 14, air only flows into the air distribution device 5 and reaches between the distributor elements 11 through the clean air outlet 7. Since the exhaust direction of the air leaving the clean air outlet 7 does not coincide with the radial direction of the rotating shaft 6, a torque acts on the air distribution device 5 during the flow through the clean air outlet 7, causing the air distribution device 5 to Rotation around the rotation axis 6. During the rotation of the air distribution device 5, the clean air outlet 7 is displaced relative to the distributor element 11 or the airflow channel 25 constructed therebetween. Therefore, during the gradual rotation process, the clean air outlets 7 are respectively connected to different air flow channels 25, so that the air flowing out from the distributor cavity 9 passes through the different air flow channels 25 to reach the peripheral surface 10 of the filter element 4, respectively. The airflow is increased by focusing the airflow onto only one of the plurality of airflow channels 25, and air is applied to the circumferential partition of the filter element 4 corresponding to each airflow channel 25 so as to be located on the inner wall of the filter element 4, That is, the object to be sucked in the object to be sucked 3 is loosened and can be carried out toward the suction nozzle 18.

Claims (10)

    A vacuum cleaner has a filter element (4) that separates a clean air chamber (2) from an object to be sucked (3), which is in the direction of the air to be cleaned from the object to be sucked (3) during a filtering operation. Flowing through the clean air chamber (2), and in the regeneration operation, clean air flows from the direction of the clean air chamber (2) toward the object to be sucked (3) so as to face the filter element (4). The object to be aspirated is separated on one side of the object to be aspirated, and is characterized in that the filter element (4) is constituted as a part of the volume of the object to be aspirated in at least one of the object to be aspirated, and corresponds to The filter element (4) is provided with an air distribution device (5) in the clean air chamber (2), which is adapted to deflect the clean airflow to different sections of the filter element (4) in a time-varying manner.         The vacuum cleaner according to claim 1, wherein the air distribution device (5) is movable relative to the filter element (4).         The vacuum cleaner according to claim 1 or 2, wherein the air distribution device (5) is supported on the filter element (4) in a manner rotatable about a rotation axis (6), and has at least one containing opening A flat clean air outlet (7), the surface normal of the opening plane does not correspond to the radial direction of the rotation axis (6), and / or the clean air outlet (7) is arranged and / or constructed so as to pass through the The clean air flow from the clean air outlet (7) does not follow the radial direction of the clean air outlet (7).         The vacuum cleaner according to any one of the preceding claims, wherein the air distribution device (5) has a distributor housing (8) containing a distributor cavity (9) that provides a volume of air.         The vacuum cleaner according to any one of the preceding claims, wherein between the air distribution device (5) and the filter element (4), especially between the air distribution device (5) and the filter element (4) Between the peripheral surface (10) of the effective filter material, a plurality of distributor elements (11) are provided which provide airflow channels (25), which are adapted to deflect clean airflow to different sections of the filter element (4).         The vacuum cleaner according to claim 5, wherein the distributor elements (11) are anti-rotationally connected to the air distribution device (5), the filter element (4), and / or a filter cavity containing the filter element (4) (12) Connected.         The vacuum cleaner according to any one of the preceding claims, wherein the clean air chamber (2) has a valve (13) that can be switched from a filtering operation position to a regeneration operation position in a manner triggered by pressure, and vice versa, and Wherein, in the filtering operation position, the valve (13) releases the flow path of the air distribution device (5) from the fan (14) of the object chamber (3) to the vacuum cleaner (1), and, In the regeneration operation position, the valve (13) blocks its spanning flow path and realizes the flow of the air distribution device (5).         A vacuum cleaner as claimed in claim 7, wherein the valve (13) has a valve element (16) to which a resetting force of a spring element (15) is applied, which is permeable to the negative generated on the clean air side during the filtering operation Pressure, moving into the filtering operation position in the direction of the resetting force, and moving into the regeneration operating position in an opposite manner to the resetting force through the overpressure generated on the clean air side during the regeneration operation.         The vacuum cleaner according to any one of the preceding claims, wherein the filter element (4) has a capacity of at least 100 ml and a maximum of 500 ml.         A method for operating a vacuum cleaner, in particular the vacuum cleaner (1) according to any one of the preceding claims, wherein in the filtering operation, the air to be cleaned is directed from a direction of an object to be vacuumed (3) toward a clean air chamber (2) It flows through a filter element (4) that separates the clean air chamber (2) from the object to be sucked (3), and in the regeneration operation, clean air is directed from the direction of the clean air chamber (2) toward the The to-be-absorbed chamber (3) flows through the filter element to separate the to-be-absorbed substance on the side of the filter element (4) facing the to-be-absorbed chamber (3), which is characterized in that during the filtering operation, the to-be-absorbed substance Collected in a receiving volume (17) of one of the filter elements (4), and during the regeneration operation, an air distribution device (5) provided in the clean air chamber (2) The method deflects the clean air flow to different sections of the filter element (4), so as to separate objects to be sucked in the receiving volume (17).