TW201729742A - Suction type cleaning device for enabling air to flow in a direction from a suction chamber to a blower during a suction operation and to flow in a reverse flow direction during a regeneration operation - Google Patents

Abstract

The present invention relates to a suction type cleaning device (1) and, in particular, to a battery-powered handheld vacuum cleaner, which includes a blower (2), a suction chamber (3) and an air filter (4) arranged between the suction chamber (3) and the blower (2). The air filter enables air to flow in a direction from the suction chamber (3) to the blower (2) during a suction operation, and to flow in a reverse direction during a regeneration operation. In order to implement a suction type cleaning device (1) in which the regeneration of the air filter (4) and/or the suction chamber (3) is optimized, the air filter (4) of the present invention is supported inside the suction type cleaning device (1) in a comprehensively displaceable manner and, in particular, is displaced in a direction toward the blower (2) based on a position corresponding to the suction operation for the regeneration operation. Furthermore, the invention also relates to a method for operating a suction type cleaning device (1).

Description

Suction cleaning device

The present invention relates to a suction cleaning device, and more particularly to a hand-held vacuum cleaner powered by a battery, comprising: a fan, a chamber to be sucked, and an air filter disposed between the chamber to be sucked and the fan, and the air filter system In the suction operation, it can flow in the direction of the fan from the direction of the object to be sucked, and can flow in the opposite direction during the regeneration operation.

A suction cleaning device of the aforementioned type is known from the prior art. These suction cleaning devices have an air filter for removing dust and/or dirt from the air flowing toward the fan of the suction cleaning device. In particular, a regenerable air filter, ie a permanent filter, is usually used in a battery-operated suction cleaning device, while the permanent filter remains in the suction cleaning device, and for example in a suction type The base of the cleaning device is emptied. The suction operation of the vacuum cleaner usually causes dust and/or dirt to accumulate in the air filter, so that the air filter needs to be regenerated according to the working time.

The object to be sucked is caught between the air filter and the inner wall of the chamber to be sucked, depending on the specific geometry of the air filter and/or the chamber to be sucked. In order to remove the object to be sucked in the above manner to prevent adverse effects on the regeneration operation, there is a suction cleaning device (e.g., AEG Rapido hand vacuum cleaner) in the prior art, in which the pin can be squeezed out air filter. After releasing this pin, the air filter is instantly restored It is in its original shape to remove the object to be adsorbed attached to the air filter.

A disadvantage of the above solution is that the volume of the air filter is reduced by being squeezed, so that, for example, no additional cleaning elements, such as rotatable cleaning nozzles, can be placed inside the air filter.

In view of this, it is an object of the invention to provide a suction cleaning device in which the regeneration of the air filter and/or the chamber to be sucked is optimized.

The solution of the invention to achieve the above object is that the air filter is supported in an integral displaceable manner in the suction cleaning device, in particular, from the position corresponding to its suction operation for the regeneration operation, The direction of the fan is displaced.

According to the invention, the air filter is supported in this suction-type cleaning device in an integrally movable manner. Since the air filter is displaced in the direction of the fan (especially linear displacement), the distance between the air filter and the object to be sucked contained in the chamber to be sucked is increased, so that the air filter and the object to be sucked can be sandwiched The object to be sucked between the inner walls of the chamber is removed, and the object to be sucked is removed from the air filter by gravity as the case may be. Particularly in the filter cartridge, the magnitude of the displacement is preferably at least 1/20 to at most 1/2 of the given length of the filter in the direction of displacement. In a planar air filter, the displacement amplitude is suitably up to 3 times the length in the direction of displacement. In any case, the displacement ranges of the filter cartridge (stereoscopic filter) and the planar filter are preferably at least 2 mm to at most 30 mm. The invention proposes that the air filter is displaced towards the fan at the beginning of the regeneration operation and is removed from the fan at the end of the regeneration operation, i.e., at the beginning of the subsequent suction operation. Therefore, the air filter can be displaced multiple times before each regeneration operation or during the regeneration operation, thereby removing the object to be sucked contained in the air filter chamber. During this process, the displacement of the air filter and the variable volume of the chamber to be sucked all contribute to The object to be sucked is removed from the air filter or from the inner wall of the chamber to be sucked, thereby also contributing to optimal regeneration. According to the invention, the air filter is displaceable integrally (i.e., as a whole) such that a cleaning element, such as a rotary air nozzle, is additionally disposed within the air filter, and the air nozzle is facing the fan Air is applied to the air filter on one side. The rotary air nozzle is positionally fixed in the air filter so that when the air filter is displaced, the air nozzle is also displaced at the same time.

Furthermore, the air filter is not limited to during the regeneration operation, but may advantageously perform the displacement of the present invention during the suction operation of the suction cleaning device. Advantageously, for example, the air filter can be short-ranged one or more times during the pumping operation to re-expand the free filter surface after the object to be re-oriented, thereby increasing the suction power of the suction cleaning device. For example, a user of the suction cleaning device can manually manipulate the operating element to displace the air filter. In this case, the displacement can be affected by the user depending on the situation. Alternatively, an actuator can be used that causes the air filter to be displaced automatically and, for example, periodically. The actuator can be, for example, an electric motor, a solenoid or the like. As an alternative, a bellows can also be used as the actuator, which controls the pressure difference between the suction side and the side of the chamber to be sucked, so that the object to be sucked accumulates in the air filter, thereby waiting In the case where the pressure on the suction chamber side is increased relative to the pressure on the suction side, the bellows expands and causes the air filter to be displaced. Cyclic repetitive displacements can also occur after being combined with a valve operated by displacement motion, the displacement of which is related to the cumulative increase in the air filter. This point will be explained in detail later.

The invention proposes that the air filter is arranged in such a manner that the air filter is displaced parallel to the main flow of the air flowing through the air filter. in. Therefore, the air filter is displaced in the direction from the object to be sucked into the fan or in the opposite direction. The direction corresponds to the flow-through air filter and the main direction of the air flowing from the object to be sucked through the air filter toward the fan. The main flow is preferably extended parallel to the longitudinal axis of the suction cleaning device. At the same time, the suction cleaning device can also be constructed such that the suction cleaning device is disposed above the object to be sucked in the case where the suction cleaning device is disposed on the base of the air filter, so that the air filter is removed due to the displacement of the air filter. The object to be sucked falls into the chamber to be sucked due to gravity.

The invention proposes that the air filter is a filter cartridge, in particular a cone-shaped filter cartridge. Thus, as an alternative to a substantially planar air filter, the suction cleaning device can also have a three-dimensional filter cartridge. The filter cartridge is preferably tapered such that the distance between the inner wall of the chamber to be sucked and the air filter decreases as viewed from the chamber to the fan. When the air filter is displaced in the direction of the fan, the distance between the air filter and the fixed point surrounding the inner wall of the air filter is increased, thereby clearing the object to be sucked there. More preferably, the filter cartridge can be combined with a rotary air nozzle, wherein the rotary air nozzle is disposed within the three-dimensional filter cartridge. Thus, air can be applied to the filter element (e.g., filter web) of the air filter from the inside, i.e., on the side facing the fan.

Furthermore, the invention proposes that the air filter is arranged in the suction cleaning device by limiting the flexible diaphragm of the chamber to be sucked. The flexible diaphragm constitutes a movable intermediate wall that is preferably connected in an airtight manner to the inner wall of the chamber to be sucked, and the intermediate wall separates the chamber to be sucked from the fan. The air filter is also connected to the flexible diaphragm in a gastight manner such that the flexible diaphragm is displaceably disposed between the chamber to be sucked and the fan. The flexible diaphragm displaces the air filter toward the fan and moves away from the fan, so that the air filter can be spaced apart from the object to be sucked collected in the chamber to be sucked Come. The flexible diaphragm allows the air filter to be displaced as a unit. In addition, the flexible diaphragm also ensures a seal between the air filter and the corresponding housing portion of the suction cleaning device. The flexible diaphragm allows the air filter to be displaced toward and away from the fan and perpendicular to the fan. Thus, for example, the air filter can also be moved parallel to the flexible diaphragm.

According to a particularly simple embodiment, the air filter can be manually displaced, in particular by an outwardly facing actuating element on the suction cleaning device, which is mechanically operatively connected to the air filter. This causes the manipulation of the operating element to cause displacement of the air filter. The operating element can face outward depending on the type of slide switch on the housing of the suction cleaning device. The user of the suction cleaning device can displace the operating element relative to its housing, wherein the air filter is also displaced due to the mechanically operative connection between the operating element and the air filter. The actuating element can act, for example, directly on the air filter and cause the air filter to be displaced. Therein, the actuating element can be fixedly connected to the air filter, for example in one piece with the air filter or as a separate element acting on the air filter. The steering element can be displaced once before the regeneration operation or during the regeneration operation, or multiple times during the regeneration operation. In addition, the operating element can also be displaced by contact with the base. The actuating element can, for example, be brought into contact with the respective element of the base and displaced by the fact that the suction cleaning device is arranged on the base, which in turn causes the air filter to be displaced in the direction of the fan.

The invention proposes that the air filter has a coupling element for displacing the air filter by means of the actuating element. Therefore, the actuating element is not directly connected to the air filter, but rather the steering movement is effected by means of a coupling element arranged on the air filter. Since the air filter is constructed independently of the operating element, it simplifies The installation process of the air filter and the actuating element in this suction cleaning device, for example, in terms of replacing the filter. The coupling element can be, for example, a projection that protrudes from the periphery of the air filter, which overlaps the steering element in the radial direction of the air filter.

According to another embodiment, the invention proposes that the air filter can be automatically displaced during a suction or regeneration operation. According to this solution, the user of the suction cleaning device does not need to manually manipulate its operating elements. Specifically, the pressure exerted on the air filter during the regeneration operation and the suction operation is used to displace the air filter. The invention particularly proposes that the air filter can be displaced by a bellows disposed between the chamber to be sucked and the fan, the bellows being pressurizable according to the pressure between the air pressure in the bellows and the air pressure outside the bellows Poorly compressed and/or expanded. During the suction operation, a negative pressure is generated on the suction side of the fan, i.e. on the side of the air filter that faces away from the chamber to be sucked. In contrast, there is a pressure greater than the negative pressure in the bellows connected to the ambient air surrounding the suction cleaning device. The bellows expands due to the pressure difference, and the air filter disposed on the bellows is displaced toward the chamber to be sucked. For this purpose, the bellows is fixedly arranged on the housing of the suction cleaning device via the retaining wall with its side facing away from the air filter. The side of the bellows that is directed toward the air filter is removably retained in the suction cleaning device and is coupled to the air filter. In the case of the regeneration operation, the air flows in the opposite direction to the suction operation and passes through the air filter, wherein an overpressure is generated on the side of the air filter facing away from the chamber to be sucked. Due to the pressure differential with the air pressure in the bellows, the bellows contracts and pulls the air filter toward the retaining wall, i.e., away from the chamber to be sucked in the direction of the fan. Therefore, the change in the pressure ratio during the pumping operation and the regeneration operation causes the bellows to be displaced, wherein the bellows is automatically displaced due to its construction scheme and arrangement. Thereby, the bellows moves relative to the object to be sucked contained in the chamber to be sucked, Optimal regeneration is achieved within the chamber to be sorbed, or the object to be sorbed can be redirected.

The invention proposes that the windbox is not directly connected to the air filter, but rather to the filter receptacle, and the air filter is inserted into the filter receptacle in a replaceable manner. Therefore, the user of the suction cleaning device can replace the air filter. In this case, the filter housing is connected to the flexible diaphragm to allow displacement of the air filter.

Alternatively, the air filter can also be displaced by an electric actuator (rather than by a bellows), in particular by an electric motor, a solenoid or the like. In this case, the actuator can be actuated, for example, by a switch, or automatically by a sensing mechanism that measures pressure or differential pressure, for example.

The invention proposes that the bellows is annular. Viewed from the direction of the fan towards the air filter, the annular bellows is arranged annularly around the air filter such that the bellows uniformly acts on the air filter along the entire periphery of the air filter.

As an alternative, the invention proposes that the bellows has a plurality of sub-windows arranged along the circumference of the air filter.

Furthermore, the invention proposes that the bellows has a valve that can be opened and/or closed depending on the defined contraction value and/or expansion value. In particular, it is provided that the displacement wall of the bellows with the valve opening is connected to the displaceable air filter, wherein the actuating element of the sealing element acting on the sealing valve opening is arranged in a fixed manner on the suction cleaning device. On the housing part. The air filter can thus be periodically displaced during the regeneration operation and/or the suction operation in a technical solution. The bellows valve is manipulated by expansion or compression as defined by the bellows. By opening the valve, a pressure compensation is created between the pressure in the bellows (ie, the ambient pressure of the suction cleaning device) and the pressure outside the bellows, so that the air filter is re-opened from the fan and the valve is closed again. . Therefore, its process (week Period) restarted due to the change in pressure difference. The cycle time of the displacement of the bellows can be varied by adjusting parameters such as valve surface, valve spring force, and the distance between the valve and the active component.

Finally, in addition to the aforementioned suction cleaning device, the invention also proposes a method of operating a suction cleaning device, in particular the aforementioned suction cleaning device, which has a fan, a chamber to be sucked and arranged An air filter between the suction chamber and the fan, wherein the air filter flows in the direction of the fan from the direction of the suction chamber in the suction operation, and flows in the opposite direction during the regeneration operation, wherein The air filter is displaced as a whole relative to the chamber to be sucked during the pumping operation and/or the regenerative operation, in particular in the direction of the fan from the position corresponding to its suction operation for the regeneration operation. The advantages achieved by this method are described in the previous section regarding the suction cleaning device.

The invention will now be described in detail in connection with the embodiments.

1‧‧‧Sucking cleaning device

2‧‧‧fan

3‧‧‧Sucking room

4‧‧‧Air filter

5‧‧‧(flexible) diaphragm

6‧‧‧Operating elements

7‧‧‧Coupling components

8‧‧‧ bellows

9‧‧‧ suction side

10‧‧‧ Valve

11‧‧‧Action elements

12‧‧‧ Housing Department

13‧‧‧ nozzle

14‧‧‧handle

15‧‧‧ switch

16‧‧‧Filter components

17‧‧‧ Guide slide

18‧‧‧ fastening elements

19‧‧‧ vents

20‧‧‧Sealing components

21‧‧‧ (shell part) middle wall

22‧‧‧(window) retaining wall

23‧‧‧(window) displacement wall

24‧‧‧ valve hole

25‧‧‧Filter bracket

26‧‧‧ inner wall

X‧‧‧ (air) mainstream

Figure 1 is a schematic view of the suction cleaning device of the present invention, Figure 2 is a schematic view of the air filter disposed in the suction cleaning device during the suction operation, and Figure 3 is the regeneration of the air filter of Figure 2 FIG. 4 is a schematic view of a second embodiment of the air filter during a pumping operation, FIG. 5 is a schematic view of the air filter of FIG. 4 during a regeneration operation, and FIG. 6 is a third embodiment of the air filter. Schematic representation of the mode during the pumping operation, and Figure 7 is a schematic illustration of the air filter of Figure 6 during the regeneration operation.

Figure 1 shows a suction cleaning device 1 constructed here as a hand-held vacuum cleaner powered by a battery. The suction cleaning device 1 has a suction nozzle 13 that moves over the surface to be cleaned during the conventional suction operation of the suction cleaning device 1. The user of the suction cleaning device 1 can hold the suction cleaning device 1 by means of a handle 14 constructed on the housing of the suction cleaning device 1. Furthermore, the handle 14 has a switch 15 which is here, for example, constructed to switch the switch on and off. The interior of the suction cleaning device 1 has a fan 2 and a chamber 3 to be sucked (as shown). When the fan 2 is in operation, air flows through the suction nozzle 13 toward the object to be suctioned chamber 3. The air flows through the chamber 3 to be sucked, and the object to be sucked contained in the air is intercepted in the chamber to be sucked by the air filter 4 as appropriate.

2 and 3 show a first embodiment of the air filter 4. The air filter 4 constructed as a cone filter cartridge is tapered in the direction of the chamber 3 to be sucked. The air filter 4 has a filter element 16 constructed here as a filter web. The air filter 4 or the filter holder 25 accommodating the air filter 4 is held by the flexible diaphragm 5 on the intermediate wall 21 of the casing portion 12 of the suction cleaning device 1. The flexible diaphragm 5 is composed of an elastic body, and the air filter 4 is connected to the intermediate wall 21 in an airtight manner so that the air flowing through the suction nozzle 13 toward the fan 2 can only pass through the air. The filter element 16 of the filter 4 reaches the fan 2. Furthermore, the suction cleaning device 1 has an actuating element 6 which can slide in the guide slide 17 of the housing part 12 of the suction cleaning device 1 . The actuating element 6 is in contact with the coupling element 7 of the filter holder 25.

2 shows the starting position of the actuating element 6, in which the actuating element 6 has not yet been actuated, and the air filter 4 is maximally moved into the chamber 3 to be sucked. At this position (corresponding to the suction operation of the suction type cleaning device 1), the diaphragm 5 is deformed to the greatest extent in the direction of the object to be sucked chamber 3, so that the volume of the chamber 3 to be sucked is reduced.

In contrast, FIG. 3 shows the position of the air filter 4 during the regeneration operation of the suction cleaning device 1. The actuating element 6 is displaced in the direction of the fan 2 in the guide carriage 17 (for example by manual intervention by the user). The air filter 4 is displaced in the direction of the fan 2 by a mechanically operative connection of the actuating element 6 to the coupling element 7 of the filter holder 25. Due to this displacement, the volume of the chamber 3 to be sucked increases, and the distance between the filter element 16 of the air filter 4 and the fixed point of the inner wall 26 of the air filter 4 surrounding the air filter 4 is increased. . In this way, the object to be sucked collected between the inner wall 26 and the air filter 4 can be removed, and the object to be sucked can be further dropped into the object to be sucked chamber 3 in the direction of gravity. The actuating element 6 can be actuated once before the regenerative operation or during the regenerative operation, or alternatively, the actuating element is actuated multiple times during the regenerative operation, such that the air filter 4 is moved multiple times in the suction cleaning device 1 so that Optimally removes the material to be absorbed.

4 and 5 show a second embodiment of the invention in which a bellows 8 for displacing the air filter 4 in the suction cleaning device 1 is arranged. The bellows 8 is fixedly arranged on the housing part 12 of the suction cleaning device 1 on the one hand by the retaining wall 22 and on the air filter 4 by means of a moving displacement wall 23 on the other hand. For example, four such bellows 8 are arranged around the air filter 4 for the circumference of the air filter 4, wherein only one bellows 8 is shown here.

In the suction operation of the suction cleaning device 1 shown in Fig. 4, a negative pressure is generated on the suction side 9 of the fan 2, which is smaller than the pressure in the bellows 8. The pressure differential causes the bellows 8 to expand as shown in the figure, and the air filter 4 is maximally remote from the fan 2 when it expands, i.e., is displaced downward in the drawing. With respect to the regeneration operation of the suction cleaning device 1 shown in Fig. 5, the air filter 4 is caused to flow in the opposite direction to the suction operation. This is achieved, for example, by attaching the nozzle 12 to an external fan of the base. in In the regeneration operation, an overpressure is generated around the bellows 8, which is greater than the pressure in the bellows 8. This causes the bellows 8 to be compressed, and the displacement wall 23 of the bellows 8 moves to a retaining wall 22 that is fixedly disposed on the housing portion 12 when compression occurs. At the same time, the air filter 4 is also displaced upwards, i.e., in the direction of the fan 2 of the suction cleaning device 1. The displacement of the air filter 4 is achieved by the flexible diaphragm 5. Therefore, at the beginning of the regeneration operation, a distance is generated between the air filter 4 and the object to be absorbed contained in the object to be sucked chamber 3. The above scheme can optimize the regeneration of the object to be sucked chamber 3 and the air filter 4.

6 and 7 show a third embodiment of the present invention, wherein the bellows 8 has a valve 10 having a valve bore 24 formed in the displacement wall 23, a sealing member 20 corresponding to the valve bore 24, And an action element 11 for displacing the sealing element 20. Depending on the extent of compression or expansion of the bellows 8, the active element 11 is in or out of contact with the sealing element 20.

During the suction operation shown in Fig. 6, since the air pressure in the bellows 8 is relatively high with respect to the environmental pressure, the bellows 8 is maximally expanded to separate the action element 11 from the sealing member 20. As shown in Fig. 7, once the flow direction through the air filter 4 is reversed for performing the regeneration operation, the environmental pressure in the bellows 8 is increased, and the bellows is compressed. Thereby, the displacement wall 23 is moved to the holding wall 22, and the action member 11 comes into contact with the sealing member 20, thereby opening the valve hole 24 and allowing air to flow into the bellows 8 from the surrounding environment. Thereby, a pressure compensation is formed between the bellows 8 and the surrounding environment, the surrounding environment causes the bellows 8 to expand again, and the air filter 4 is displaced downward (i.e., away from the fan 2). As the regeneration operation continues, a pressure differential is again created between the bellows 8 and its surroundings, causing the bellows 8 to be recompressed, the valve 10 to be reopened, and pressure compensation to be reformed. During this process, the air filter 4 is repeatedly displaced within the suction cleaning device 1 to clean the air filter 4 and to be sucked Room 3 provides the best assistance. The expansion or compression cycle of the bellows 8 can be varied by the parameters of the valve 10 to thereby change the displacement of the air filter 4.

Although not shown in the drawings, a rotary cleaning nozzle may be additionally disposed within the air filter 4 to internally apply air to the filter element 16 of the air filter 4 (in terms of regeneration operation). This cleaning nozzle may additionally vibrate in the regeneration operation, for example, due to imbalance of the rotating shaft. Since the imbalance of the cleaning nozzle also causes the filter element 16 to vibrate, the cleaning effect can be additionally achieved after the filter element 16 is passed through with the air. The vibration is transmitted to the filter element 16 through the air flow and/or through the cleaning nozzle, and the self-cleaning nozzle is transmitted to the air filter 4 such that the air filter is shaken and a portion of the object to be adsorbed attached to the filter element 16 is removed. . By supporting the air filter 4 on the flexible diaphragm 5, the air filter 4 may also vibrate in the radial direction, so that the air filter 4 is not only displaced toward or away from the fan 2, but also substantially The displacement is perpendicular to the direction of the fan.

3‧‧‧Sucking room

4‧‧‧Air filter

5‧‧‧(flexible) diaphragm

6‧‧‧Operating elements

7‧‧‧Coupling components

9‧‧‧ suction side

12‧‧‧ Housing Department

16‧‧‧Filter components

17‧‧‧ Guide slide

21‧‧‧ (shell part) middle wall

25‧‧‧Filter bracket

26‧‧‧ inner wall

X‧‧‧ (air) mainstream

Claims (12)

A suction type cleaning device, in particular, a battery-powered hand-held vacuum cleaner, comprising: a fan (2), a to-be-absorbed chamber (3), and air disposed between the object-receiving chamber (3) and the fan (2) a filter (4) which flows in the suction operation from the direction of the object to be suction chamber (3) toward the fan (2) and flows in the opposite direction during the regeneration operation, It is characterized in that the air filter (4) is supported in the suction cleaning device (1) in a displaceable manner as a whole body. The suction cleaning device of claim 1, wherein the air filter (4) is displaceable toward the fan (2) from a position corresponding to the suction operation for the regeneration operation. The suction cleaning device of claim 1 or 2, wherein the air filter (4) is displaced in a direction (x) parallel to a main flow of air passing through the air filter (4), Arranged in this suction cleaning device (1). A suction cleaning device according to any of the preceding claims, wherein the air filter (4) is a filter cartridge, in particular a cone-shaped filter cartridge. A suction cleaning device according to any of the preceding claims, wherein the air filter (4) is arranged in this suction mode by means of a flexible diaphragm (5) that limits the chamber (3) Clean the device (1). A suction cleaning device according to any of the preceding claims, wherein the air filter (4) can be used, in particular, by an outwardly facing actuating element (6) on the suction cleaning device (1) Manually displaced, and the steering element is mechanically operatively coupled to the air filter (4) such that manipulation of the operating element (6) causes displacement of the air filter (4). The suction cleaning device of claim 6, wherein the air filter (4) has a coupling element for displacing the air filter (4) by the operating member (6) (7). The suction cleaning device of any one of claims 1 to 5, wherein the air filter (4) is automatically displaceable during a suction operation or a regeneration operation, in particular, by being disposed in the to-be-absorbed chamber (3) automatically displaced from the bellows (8) between the fan (2), the bellows being based on the air pressure in the bellows (8) and the air pressure outside the bellows (8) The pressure difference is compressed and/or expanded. The suction cleaning device of claim 8, wherein the bellows (8) is annular. A suction cleaning device according to claim 8 or 9, wherein the bellows (8) has a plurality of sub bellows arranged along the circumference of the air filter (4). The suction cleaning device of any one of claims 8 to 10, wherein the bellows (8) has a valve (10) that can be opened and/or closed according to a defined contraction value and/or expansion value, Wherein, the displacement wall (23) of the bellows (8), in particular having a valve hole (24), is connected to the displaceable air filter (4), and wherein the valve hole is sealed (24) The active element (11) of the sealing element (20) is fixedly arranged on the housing part (12) of the suction cleaning device (1). A method of operating a suction cleaning device, in particular, the suction cleaning device (1) of any of the preceding claims, comprising: a fan (2), a chamber to be sucked (3), and An air filter (4) disposed between the chamber (3) and the fan (2), wherein the air filter (4) is oriented in the suction operation from the chamber (3) Flowing in the direction of the fan (2) and flowing in the opposite direction during the regeneration operation, characterized in that the air filter (4) is overall relative to the suction operation and/or regeneration operation The displacement of the suction chamber (3), in particular, is displaced in the direction of the fan (2) from the position corresponding to its suction operation for the regeneration operation.