Vacuum cleaning device

Abstract

A vacuum cleaning device (1), in particular a battery-operated handheld vacuum cleaner, comprising a suction nozzle (8), a blower (2), a suction chamber (3), and an air filter (4) arranged in the flow direction between the suction chamber (3) and the blower (2), which, in suction operation, is flowed through from the direction of the suction chamber (3) towards the blower (2) and, in regeneration operation, is flowed through in the opposite direction, characterized in that the suction chamber (3) is associated with at least one longitudinal section of the suction chamber (3) in the direction of flow and / or a bypass channel (5) bridging the air filter (4), wherein an outlet area (6) facing away from the blower (2) opens into the suction chamber (3), such that, in regeneration operation, suction material adhering to the air filter (4) is loosened and conveyed further into the suction chamber (3), moving towards a cross-sectional narrowing. (7) flows between the suction chamber (3) and the suction nozzle (8),that the discharge area (6) is located in the area of ​​the cross-sectional reduction (7) of the suction chamber (3), in a transition area between the suction chamber (3) and the suction nozzle (8) of the vacuum cleaning device (1), and that the suction material (20) contained in the suction chamber (3) can be conveyed out of the vacuum cleaning device (1) through the suction nozzle (8).

Description

field of technology

[0001] The invention relates to a vacuum cleaning device according to the features of the preamble of claim 1. State of the art

[0002] Vacuum cleaning devices of this type are well known. They feature an air filter, particularly a so-called permanent filter, which is not replaced when the vacuum is completely full of debris—or earlier if desired—but is instead cleared of debris by an air stream flowing in a direction opposite to the direction of suction. For this purpose, either the vacuum cleaner's own fan is used, for example, by connecting the debris compartment to a pressure side of the fan, or an external fan is connected.

[0003] During regeneration, the material contained in the suction chamber is blown or sucked out of the vacuum cleaner via the suction nozzle in the opposite direction to the suction mode. This can lead to jamming of the material in the area of ​​a narrow cross-section of the suction chamber, particularly in the transition area between the suction chamber and the suction nozzle of the vacuum cleaner, which can hinder or even prevent regeneration.

[0004] DE 10 2011 001 141 A1 discloses a vacuum cleaning device in which chambers for collecting dirt or dust particles are formed in a rotating body, with fan blades arranged radially outward to drive the rotating body. A bypass created by this extends approximately half the length of the dirt chambers. Ejected dirt and dust particles are conveyed via a duct section into a downstream dust bag, which can be removed manually in the usual way.

[0005] DE 10 2008 047 047 A1 discloses a vacuum cleaning device in which dust-laden air is sucked through one of two filter sections by means of a suction turbine. During regeneration mode, the air flows alternately through one or the other filter in the opposite direction, without collecting the removed suction material in a suction material chamber. Even in regeneration mode, the air flows only through the section downstream of the filter in cleaning mode.

[0006] A vacuum cleaning device known from JP 2011-78 520 A features a bypass channel that ends approximately midway along a length of the suction chamber. Loosened suction material can be removed through a separate flap.

[0007] Based on the prior art as known from DE 10 2011 001 141 A1, the object of the invention is to create a vacuum cleaning device in which optimal regeneration of the suction material chamber or the air filter is possible. Summary of the invention

[0008] To achieve the above-mentioned object, the invention proposes a vacuum cleaning device in which at least one bypass channel is assigned to the suction material chamber, which extends over a length of the suction material chamber in the direction of flow, and / or a bypass channel bridging the air filter, wherein an outlet end region facing away from the fan opens into the suction material chamber, that in the regeneration mode, suction material deposited on the air filter is released and conveyed further into the suction material chamber, wherein it flows in the direction of a cross-sectional taper between the suction material chamber and the suction nozzle, that the outlet end region is arranged in the region of the cross-sectional taper of the suction material chamber, in a transition region between the suction material chamber and the suction nozzle of the vacuum cleaning device, and that the suction material contained in the suction material chamber can be conveyed out of the vacuum cleaning device through the suction nozzle.

[0009] A portion of the air flowing to the suction nozzle can be guided through the bypass channel into an area of ​​the suction material chamber, where any jammed suction material can be specifically blown away or sucked away. Due to the reduced flow cross-section of the bypass channel compared to the suction material chamber, the air portion guided in the bypass channel achieves a higher flow velocity. This makes it possible to release the suction material from the suction material chamber, in particular from the area of ​​a cross-sectional taper, using the air portion guided in the bypass channel. It is particularly recommended that the bypass channel be guided into the area of ​​the cross-sectional taper and, in particular, that it be guided past at least a portion of the suction material wedged in the area of ​​the cross-sectional taper.The air portion flowing through the bypass duct flows towards the wedged suction material, preferably from radially outside to radially inside relative to a longitudinal axis of the vacuum cleaning device, so that the suction material is transported away, for example, in the direction of a longitudinal axis of the suction material chamber. The branched air portion is then removed from the vacuum cleaning device via the suction nozzle. If the bypass duct bridges an axial length of the suction material chamber, the air can pass through the air filter into the bypass duct and / or directly from a clean air zone located outside the suction material chamber, in which, for example, the fan is located. If the bypass duct also bridges the air filter, the air flows, for example, directly from the clean air zone into the bypass duct, for example through an intermediate wall formed between the clean air zone and the suction material chamber or a filter holder that accommodates the air filter.

[0010] The outlet end section is located in the area of ​​a cross-sectional taper in the suction material chamber, in a transition area between the suction material chamber and a suction nozzle of the vacuum cleaning device. The air guided in the bypass duct can leave the bypass duct via the outlet end section. The outlet end section opens into the area of ​​the cross-sectional taper in the suction material chamber, advantageously where the suction material usually gets stuck. The outlet end section is advantageously assigned to the level with the smallest cross-section so that the level most affected by a suction material accumulation is exposed to the air portion guided in the bypass duct. It is particularly recommended that the outlet end section be nozzle-shaped so that the flow velocity of the air portion flowing through the bypass duct is further increased and an even greater force can be exerted on the suction material. This improves the regeneration success.

[0011] Furthermore, it is proposed that the outlet end region be movable by applying air to the bypass channel. Suction material arranged in the region of the outlet end region of the bypass channel can thus be loosened by the air flow flowing through the bypass channel. This loosening occurs not only through the flow itself, but also through a movement of the bypass channel. For this purpose, the outlet end region of the bypass channel can, for example, be designed to be flexible, so that it expands, for example, inflates, when exposed to air. Furthermore, the outlet end region can also have movable elements such as movable flaps or the like, which are moved by the air flow flowing through the bypass channel and can thus, in turn, mechanically act on the suction material wedged in the suction material space.

[0012] Furthermore, it is proposed that the bypass channel be delimited on the one hand by an outer wall and on the other hand by a partition wall spaced from the outer wall. The partition wall spaced from the outer wall can be formed along the entire circumference of the suction material chamber, so that the bypass channel completely surrounds the suction material chamber in the circumferential direction. Viewed in a direction in which a longitudinal axis of the vacuum cleaning device or of the suction material chamber appears point-like, the bypass channel is thus annular. As a result, the suction material chamber, in particular the area of ​​the cross-sectional taper, can be subjected to a uniform flow in a radial direction. This facilitates the removal of the suction material in this area. Alternatively, it is also possible for the suction material chamber to have more than one bypass channel. For example, several bypass channels can be arranged along a circumferential direction of the suction material chamber.The bypass channels are advantageously arranged symmetrically.

[0013] Furthermore, it is also possible for the bypass channels to be formed within the suction chamber. In this case, they are designed, for example, as hose lines running through the suction chamber, which, for example, lead from a clean air area of ​​the vacuum cleaning device to a cross-sectional taper of the suction chamber.

[0014] Furthermore, it is proposed that the partition wall adjoins, in particular is formed, the air filter, a filter holder accommodating the air filter, and / or an intermediate wall arranged between a clean air area and the suction material chamber. The intermediate wall can be arranged on an outer wall of the bypass duct or formed integrally therewith. If the partition wall is formed on the air filter or on a filter holder accommodating the air filter, the partition wall can be removed from the vacuum cleaning device at the same time as the air filter or filter holder. This enables optimal accessibility of the partition wall, e.g. for cleaning purposes or for replacing the partition wall. The partition wall can be formed integrally with the air filter and / or the filter holder, or it can be attached to the air filter or filter holder as a separate element.If the partition wall is formed on the intermediate wall, it remains stationary within the vacuum cleaning device, preventing accidental displacement of the bypass channel, e.g., during a filter change or similar. The partition wall is advantageously made of a plastic material, allowing it to be manufactured cost-effectively, e.g., by injection molding. Furthermore, this facilitates a one-piece design with the air filter, filter holder, or the intermediate wall of the suction material compartment, which are also typically made of plastic.

[0015] Furthermore, the partition wall can be designed separately from the air filter, the filter holder, and / or the intermediate wall. In this case, the partition wall is a separate element that can be removed from the vacuum cleaning device independently of the air filter or the filter holder and, for example, cleaned or replaced. This can also result in modularity in the sense that a different number of partition walls can be arranged to form multiple bypass channels. It is also possible, for example, to vary the volume of a bypass channel as desired by changing the distance between the partition wall and the outer wall.

[0016] It is proposed that the bypass channel have a flow passage to the portion of the suction material chamber containing the air filter, in particular an opening in a partition wall separating the bypass channel from the suction material chamber. Air from the air filter and / or the portion of the suction material chamber containing the air filter can flow into the bypass channel through the flow passage. The air flowing toward the suction nozzle during regeneration operation thus first flows through the air filter, then, if appropriate, a portion of the suction material chamber, and then the bypass channel. The flow passage can, in particular, be an opening in the partition wall of the bypass channel.In the event of a blockage of a transition area between the suction material chamber and the suction nozzle with suction material during regeneration operation, a portion of air can thus enter the bypass channel through this opening and leave it again via the outlet end area in the area of ​​the blockage in order to flow to the blockage there in a targeted manner and remove it.

[0017] Particularly advantageously, the flow passage comprises a grid and / or mesh. The grid or mesh can be made of plastic, metal, or a composite material. The grid or mesh can prevent coarse material contained in the suction material chamber from penetrating the bypass channel, which could otherwise lead to blockages of the bypass channel. A mesh size of less than 5 mm is recommended for the grid or mesh. Furthermore, the mesh size should not be less than 0.3 mm, since otherwise the flow resistance of the grid or mesh increases excessively and the air flow through the bypass channel can no longer achieve the desired effect.

[0018] Furthermore, it is proposed that the air filter, a filter holder accommodating the air filter, and / or an intermediate wall arranged between a clean air area and the suction material chamber have an air inlet opening connecting the bypass duct and / or the suction material chamber with the clean air area located outside the suction material chamber. According to this embodiment, air can flow directly from a clean air area located outside the suction material chamber into the bypass duct. The air does not flow through the filter material of the air filter. The air inlet opening can be formed either in the air filter, in the filter holder, or in an intermediate wall arranged between the clean air area and the suction material chamber. For example,The air inlet opening in the filter holder can be formed along the circumference of the air filter, creating an annular air inlet opening, to which a likewise annular bypass channel is particularly advantageously assigned. A portion of the air can thus flow directly from the clean air area through the air inlet opening into the bypass channel. Additionally, a further portion of the air can flow through an air inlet opening from the clean air area into the suction material chamber, for example, to loosen suction material deposited on the air filter. In this case, a first portion of the air flows from the clean air area into the bypass channel, and a second portion of the air flows into the suction material chamber.

[0019] It is proposed that the air inlet opening be provided with a filter material. This prevents suction material from the suction chamber from entering the clean air area during vacuuming operation of the vacuum cleaning device and causing damage to the fan. The filter material of the air inlet opening can be identical to the filter material of the air filter. The air inlet opening between the bypass duct and the clean air area can be a grid or mesh that only retains coarse particles, since the bypass duct can be protected from the flow of suction material by additional means, such as check valves.

[0020] Finally, it is proposed that the bypass channel, in particular the outlet end region and / or an air inlet opening connecting the bypass channel to a clean air region located outside the suction material chamber, have a check valve. The bypass channel is thus designed such that, during suction operation of the vacuum cleaning device, no suction material can enter the clean air region through the bypass channel. The outlet end region or the air inlet opening can thus be provided with a check valve that allows air to enter the bypass channel in only one direction. The check valve can, for example, be designed as a flexible sealing lip in the region of the outlet end region or as a check valve arranged on the air inlet opening, which closes during suction operation and opens during regeneration operation.

[0021] Alternatively or additionally, the air can be guided past the outlet end region of the bypass channel during suction operation by arranging the outlet end region in an area of ​​the suction material space with a lower flow velocity than the other areas. Short description of the drawings

[0022] The invention is explained in more detail below using exemplary embodiments. They show: Fig. 1 a vacuum cleaning device according to the invention, Fig. 2 a longitudinal section through a suction material chamber of the vacuum cleaning device during a regeneration operation according to a first embodiment, Fig. 3 a longitudinal section through a suction material chamber according to a second embodiment, Fig. 4 a longitudinal section through a suction material chamber according to a third embodiment, Fig. 5 an exploded view of the suction material chamber and the air filter according to a first embodiment, Fig. 6 an exploded view of the suction material chamber and the air filter according to a second embodiment, Fig. 7 an exploded view of the suction material chamber and the air filter according to a third embodiment, Fig. 8 an exploded view of the suction material chamber and the air filter according to a fourth embodiment. Description of the embodiments

[0023] Fig. 1 shows a vacuum cleaning device 1, which here is designed as a battery-operated handheld vacuum cleaner. The vacuum cleaning device 1 has a housing with a suction nozzle 8 for guiding the vacuum cleaning device 1 over a surface to be cleaned, as well as a handle 19 facing away from the suction nozzle 8 for guiding the vacuum cleaning device 1 by a user. A switch 18, designed here as an on / off switch, is arranged on the handle 19. The vacuum cleaning device 1 also has a suction material chamber 3 with an air filter 4 arranged therein, as well as a fan 2. The air filter 4 is designed here as a three-dimensional conical candle filter that protrudes into the suction material chamber 3.

[0024] During vacuuming operation of the vacuum cleaning device 1, the suction material 20 sucked up from the surface to be cleaned passes through the suction nozzle 8 into the suction material chamber 3 of the vacuum cleaning device 1 and is retained there by the air filter 4, so that only air freed of the suction material 20 can flow to the blower 2. The suction material 20 is collected in the suction material chamber 3 and, in particular, also deposits on the air filter 4. Vacuuming operation can continue until the air filter 4 or the suction material chamber 3 is full. For the regeneration or emptying of the suction material chamber 3 including the air filter 4, an air flow opposite to a usual flow direction during a suction operation is passed through the air filter 4 and the suction material chamber 3 during a regeneration operation of the vacuum cleaning device 1, so that the suction material 20 contained in the suction material chamber is conveyed out of the vacuum cleaning device 1 through the suction nozzle 8.For this regeneration operation, the suction chamber 3 can be connected via the suction nozzle 8 to an external fan, in particular a fan of a base station for the vacuum cleaning device 1. Alternatively, it is also possible to operate the vacuum cleaning device's own fan 2 so that it blows air through the air filter 4 into the suction chamber 3. For this purpose, the fan 2 can be operated in the opposite direction of rotation, if necessary, or the exhaust air from the fan 2 can be redirected into the suction chamber 3 by means of a corresponding flow diversion.

[0025] The embodiments of the invention presented below are independent of whether the suction material chamber 3 or the air filter 4 is blown out or sucked out during the cleaning operation.

[0026] Fig. Figure 2 shows a portion of the vacuum cleaning device 1, which includes the suction material chamber 3 and at least partially the suction nozzle 8, as well as a clean air region 13 in which the fan 2 is arranged. The suction nozzle 8, the suction material chamber 3, and the clean air region 13 are arranged one behind the other along a longitudinal axis 17 of the vacuum cleaning device 1. The vacuum cleaning device 1 has outer walls 9, which are formed in the circumferential direction of the vacuum cleaning device 1 with respect to the longitudinal axis 17. Furthermore, the vacuum cleaning device 1 has an intermediate wall 21, which separates the suction material chamber 3 from the clean air region 13. The air filter 4, designed as a conical candle filter, is arranged with the aid of a filter holder 11 on the intermediate wall 21 separating the suction material chamber 3 from the clean air region 13.The air filter 4 extends into the suction material chamber 3 and is traversed by air both during suction operation and during regeneration operation of the vacuum cleaning device 1. A filter material 15, here, for example, a filter fleece, is arranged on the peripheral surface of the air filter 4.

[0027] At a distance from the outer wall 9 of the vacuum cleaning device 1, a partition wall 10 is formed over an axial length of the suction material chamber 3 with respect to the longitudinal axis 17. The partition wall 10 is fastened to the intermediate wall 21, namely formed integrally therewith, and surrounds the air filter 4 in the circumferential direction. In detail, the partition wall 10 is cylindrical and arranged coaxially with the air filter 4 and the outer wall 9 with respect to the longitudinal axis 17. The partition wall 10 is arranged at a defined distance from the outer wall 9, e.g., 10 mm. A bypass channel 5, which is also cylindrical, is formed between the outer wall 9 and the partition wall 10. This bypass channel 5 extends from the filter holder 11 to a transition area between the suction material chamber 3 and the suction nozzle 8, namely where the suction material chamber 3 has a cross-sectional taper 7.The end region of the bypass channel 5 associated with the cross-sectional taper 7 is designed as an outlet end region 6. On the side opposite the outlet end region 6, the partition wall 10 has a flow passage 12 through which a portion of air can flow into the bypass channel 5. The flow passage 12 here has a grid through which the suction material 20 contained in the suction material chamber 3 is prevented from entering the bypass channel 5. The mesh size of the grid here is, for example, less than 3 mm.

[0028] For regeneration operation, the flow direction of the fan 2 is reversed compared to the flow direction during suction operation, so that air flows from the clean air area 13 into the air filter 4, passes through the filter material 15 and reaches the suction material chamber 3. In the process, suction material 20 deposited on the filter material 15 is released and conveyed further into the suction material chamber 3. The suction material 20 flows in the direction of the suction nozzle 8 towards the cross-sectional taper 7 between the suction material chamber 3 and the suction nozzle 8. Depending on the type and size of the suction material 20, this may lead to wedging of the suction material 20 in the area of ​​the cross-sectional taper 7. Due to the resulting pressure increase within the suction material chamber 3, at least a portion of the air can pass through the flow passage 12 of the partition wall 10 into the bypass channel 5.The suction material 20 contained in the suction material chamber 3 is filtered out by the grid of the flow passage 12, so that only fine material can reach the bypass channel 5. The air flows within the bypass channel 5 to the outlet end region 6, which is formed in the region of the cross-sectional taper 7. The bypass channel 5 thus bridges an axial length of the suction material chamber 3, including a portion of the suction material 20 wedged in the region of the cross-sectional taper 7. The suction material 20 is flowed against essentially from a radial direction with respect to the longitudinal axis 17, so that it is blown towards the longitudinal axis 17 on the one hand and into the suction nozzle 8 on the other. By loosening the suction material 20 lying in front of the outlet end region 6, the wedging is released, so that the suction material 20 can pass through the cross-sectional taper 7.

[0029] Fig. Figure 3 shows a second embodiment of the invention, in which the filter holder 11 arranged between the clean air area 13 and the suction material chamber 3 has an air inlet opening 14 through which air can flow directly from the clean air area 13 into the suction material chamber 3 and the bypass channel 5, bypassing the air filter 4. The air inlet opening 14 has a filter material 15, which here, like the filter material 15 of the air filter 4, is also a filter fleece. The partition wall 10 is arranged on the filter holder 11, so that when the filter holder 11 is removed, it is also removed from the vacuum cleaning device 1. The invention according to this embodiment is basically implemented as in relation to the embodiment according to Fig. 2, wherein in addition to a portion of air which flows through the air filter 4 into the suction material chamber 3, a further portion of air passes directly through the air inlet opening 14 on both sides of the dividing wall 10 into the suction material chamber 3 and the bypass channel 5. The portion of air entering the suction material chamber 3 between the air filter 4 and the dividing wall 10 allows suction material 20 deposited on the air filter 4 or the dividing wall 10 to be removed before this could cause wedging. This portion of air bridges the air filter 4. In addition, the portion of air flowing directly into the bypass channel 5 bridges an axial length of the suction material chamber 3, which extends from the air inlet opening 14 to the cross-sectional taper 7 between the suction material chamber 3 and the suction nozzle 8.The air portion flowing through the bypass channel 5 leaves the bypass channel 5 via the outlet end region 6, which is formed in the region of the cross-sectional taper 7 and flows laterally onto the suction material 20 which may be wedged there.

[0030] Fig. 4 shows an embodiment in which the intermediate wall 21 formed between the clean air area 13 and the suction material chamber 3 has an air inlet opening 14. In this case, the air inlet opening 14 is not equipped with a filter material 15, but is open without a filtering element, so that a portion of air flowing into the bypass channel 5 does not have to overcome any flow resistance at this point. To prevent suction material 20 from reaching the blower 2 via the suction nozzle 8 and the bypass channel 5 during suction operation, the outlet end region 6 of the bypass channel 5 has a check valve 16, which is designed as a flexible sealing lip that is only open during regeneration operation, but closes the bypass channel 5 at the outlet end region 6 during suction operation. The check valve 16 is pivotally mounted on the partition wall 10 on the one hand and rests against the outer wall 9 on the other.Like the partition wall 10, the check valve 16 can also be cylindrical and, with respect to the longitudinal axis 17, coaxial with the air filter 4 and the outer wall 9. Alternatively, it could also be—in . Fig. 4 not shown - the air inlet opening 14 may have a check valve 16 which opens in a flow direction identical to the check valve 16 of the outlet end region 6, i.e., closes during suction operation and opens during regeneration operation. The check valve 16 arranged in the outlet end region 6 in the form of a pivotable sealing lip can, during its pivoting movement during regeneration operation, additionally push away suction material 20 arranged in the region of the cross-sectional taper 7, i.e., in front of the check valve 16, and thus additionally contribute to the removal of the suction material 20 into the suction nozzle 8.

[0031] The Fig. 5 to 8 show exploded views of different design variants of the entire assembly comprising suction material chamber 3, outer wall 9, intermediate wall 21, partition wall 10, filter holder 11 and air filter 4.

[0032] The Fig. The embodiment shown in Figure 5 has a filter holder 11 with an integrated partition wall 10. The partition wall 10 is formed integrally with the filter holder 11, for example, as a single plastic injection-molded part. The air filter 4 is also firmly connected to the filter holder 11, but according to an alternative embodiment, can also be removed from the filter holder 11, so that the air filter 4 can be replaced separately. The partition wall 10 has a flow passage 12 with a grid for filtering coarse suction material 20. Because the partition wall 10 can be removed from the suction material chamber 3 at the same time as the air filter 4 or the filter holder 11, the user of the vacuum cleaning device 1 can also conveniently clean the partition wall 10 without having to intervene in the suction material chamber 3 of the vacuum cleaning device 1.

[0033] As already explained above, the partition wall 10 can be designed as a cylindrical element that is coaxial with the air filter 4 and the outer wall 9 with respect to the longitudinal axis 17. The flow passage 12 can also be cylindrical, i.e., circumferentially over 360 degrees, in the partition wall 10, or in the form of individual windows that only affect a specific angular range, which can also be offset from one another in the direction of the longitudinal axis 17.

[0034] Fig. 6 shows a variant in which the filter holder 11 and the partition wall 10 are formed as a common element. The air filter 4 is designed here so that it can be removed from the filter holder 11. The filter holder 11 has, starting from the longitudinal axis 17 on the side of the partition wall 10 facing away from the longitudinal axis 17, an air inlet opening 14 through which air can flow directly into the bypass channel 5, i.e. without flowing through the air filter 4. According to this embodiment, the air inlet opening 14 does not have a filtering grid or the like, so that the air can flow into the bypass channel 5 with little resistance. To shield the bypass channel 5 against the inflow of suction material 20 during suction operation of the vacuum cleaning device 1, a check valve 16 in the form of a flexible sealing lip is arranged at the outlet end region 6 of the partition wall 10.

[0035] Fig. Figure 7 shows a variant in which the partition wall 10 is fixedly formed in the suction material chamber 3. For this purpose, the partition wall 10 is firmly connected to the outer wall 9 of the vacuum cleaning device 1. A check valve 16 is again arranged at the outlet end region 6 of the bypass channel 5 formed between the partition wall 10 and the outer wall 9. The air inlet opening 14 opposite the outlet end region 6 is open and is covered by a corresponding partial region of the air filter 4, which provides a corresponding air inlet opening 14 with filter material 15. Here, no separate filter holder 11 is provided between the air filter 4 and the outer wall 9. Rather, the air filter 4 is placed directly with its edge region having the air inlet opening 14 onto the outer wall 9 and the partition wall 10.The air inlet opening 14 of the air filter 4 overlaps both the bypass duct 5 and a partial area of ​​the suction material chamber 3. As a result, during a cleaning operation of the vacuum cleaning device 1, air can flow both directly from the clean air area 13 into the bypass duct 5 and directly from the clean air area 13 into the suction material chamber 3. The additional axial air flow on the side of the partition wall 10 facing away from the bypass duct 5 can additionally prevent or eliminate wedging of suction material 20.

[0036] Fig.Finally, Figure 8 shows a variant in which the air filter 4 is also placed on the outer wall 9 without the interposition of a filter holder 11. The bypass channel 5 has a check valve 16, which is designed as a pivotable valve element, at both the outlet end region 6 and the air inlet opening 14. Both check valves 16 are designed to close during suction operation of the vacuum cleaning device 1 and open during regeneration operation.

[0037] Although a multitude of subcombinations of connection options between the air filter 4, the filter holder 11, and the suction material chamber 3 with various inflow options into the bypass channel 5, for example, through a flow passage 12 or an air inlet opening 14, are naturally also possible, only individual embodiments are shown in the figures. Of course, the type of check valves 16, the use of filter material 15 in the flow passage 12 and the air inlet opening 14, and the like can also vary. List of reference symbols 1 vacuum cleaning device 2 fans 3 Suction material compartment 4 air filters 5 Bypass channel 6 Outlet end area 7 Cross-sectional taper 8 Suction nozzle 9 Outer wall 10 Partition wall 11 filter holders 12 Flow passage 13 Clean air area 14 Air inlet opening 15 Filter material 16 Check valve 17 Longitudinal axis 18 switches 19 Handle 20 suction material 21 Partition wall

Claims

[1] Vacuum cleaning device (1), in particular a battery-operated hand-held vacuum cleaner, with a suction nozzle (8), a blower (2), a suction material chamber (3) and an air filter (4) arranged between the suction material chamber (3) and the blower (2), through which air flows in a suction mode from the direction of the suction material chamber (3) in the direction of the blower (2) and in a regeneration mode in the opposite direction, characterized bythat the suction material chamber (3) is assigned at least one bypass channel (5) extending over a length of the suction material chamber (3) in the direction of flow and / or a bypass channel (5) bridging the air filter (4), wherein an outlet end region (6) facing away from the fan (2) opens into the suction material chamber (3), that in the regeneration mode, suction material deposited on the air filter (4) is released and conveyed further into the suction material chamber (3), wherein it flows in the direction of a cross-sectional taper (7) between the suction material chamber (3) and the suction nozzle (8), that the outlet end region (6) is arranged in the region of the cross-sectional taper (7) of the suction material chamber (3), in a transition region between the suction material chamber (3) and the suction nozzle (8) of the vacuum cleaning device (1), and that the suction material (20) contained in the suction material chamber (3) is removed from the vacuum cleaning device (1) through the suction nozzle (8). can be extracted. [2] Vacuum cleaning device (1) according to claim 1, characterized bythat the outlet end region (6) is movable by applying air to the bypass channel (5). [3] Vacuum cleaning device (1) according to one of the preceding claims, characterized by that the bypass channel (5) is delimited on the one hand by an outer wall (9) and on the other hand by a partition wall (10) spaced from the outer wall (9). [4] Vacuum cleaning device (1) according to claim 3, characterized by that the partition wall (10) adjoins, in particular is formed on, the air filter (4), a filter holder (11) receiving the air filter (4) and / or an intermediate wall (21) arranged between a clean air area (13) and the suction material space (3). [5] Vacuum cleaning device (1) according to claim 4, characterized by that the partition wall (10) is formed separately from the air filter (4), the filter holder (11) and / or the intermediate wall (21). [6] Vacuum cleaning device (1) according to one of the preceding claims, characterized bythat the bypass channel (5) has a flow passage (12) to the partial area of the suction material chamber (3) having the air filter (4), in particular has an opening in a partition wall (10) separating the bypass channel (5) from the suction material chamber (3). [7] Vacuum cleaning device (1) according to claim 6, characterized by that the flow passage (12) has a grid and / or a net. [8] Vacuum cleaning device (1) according to one of the preceding claims, characterized by that the air filter (4), a filter holder (11) receiving the air filter (4) and / or an intermediate wall (21) arranged between a clean air area (13) and the suction material space (3) has an air inlet opening (14) connecting the bypass duct (5) and / or the suction material space (3) with the clean air area (13) located outside the suction material space (3). [9] Vacuum cleaning device (1) according to one of the preceding claims, characterized bythat the bypass channel (5), in particular the outlet end region (6) and / or an air inlet opening (14) connecting the bypass channel (5) to a clean air region (13) located outside the suction material space (3), has a check valve (16).

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