Hand-held suction-cleaning appliance

Abstract

The invention relates to a hand-held suction-cleaning appliance (10) for sucking up solids, liquids and solid / liquid mixtures, comprising an appliance housing (12) with a first housing device (14) and a second housing device (16). The first housing device (14) has a dirt container (18) with a dirt-collecting chamber (22) and a suction inlet (24), which is adjoined by a suction channel (26). A filter device (32) with a filter housing (34) and at least one filter element (50, 60, 64) is arranged in the dirt-collecting chamber (22). The second housing device (16) accommodates a suction unit (70), which is fluidically connected to the suction channel (26) via the filter device (32) and the dirt-collecting chamber (22). In order to develop the suction-cleaning appliance (10) such that it can be operated in any desired spatial orientation, the filter housing (34) is surrounded in the dirt-collecting chamber (22) by an annular chamber (42) and has an inlet opening (38) at an end (36) facing the suction inlet (24), and the suction channel (26) extends into the annular chamber (42) and has a channel outlet (44) in the annular chamber (42), wherein the inlet opening (38) is offset in relation to the channel outlet (44) in the direction of the suction inlet (24), as seen with respect to an axial direction of extent (21) of the dirt container (18).

Description

[0001] HANDHELD VACUUM CLEANER

[0002] The invention relates to a handheld vacuum cleaning device for vacuuming solids, liquids and solid-liquid mixtures, comprising a device housing with a first housing unit and a second housing unit detachably connectable to the first housing unit, wherein the first housing unit has a dirt container with a dirt collection chamber and a suction inlet to which a suction channel is connected, wherein a filter unit is arranged in the dirt collection chamber with a filter housing and at least one filter element, and wherein the second housing unit accommodates a suction unit which is in flow communication with the suction channel via the filter unit and the dirt collection chamber to form a suction flow.

[0003] The vacuum cleaning device is suitable for both dry and wet operation. It can vacuum up solid particles, such as dirt and dust, as well as liquids and mixtures of solids and liquids. The handheld vacuum cleaning device comprises a housing with a first housing unit and a second housing unit. The two housing units can be detachably connected. The first housing unit has a dirt container with a dirt collection chamber and a suction inlet, to which a suction channel is connected. A filter unit with a filter housing and at least one filter element is located in the dirt collection chamber. The second housing unit contains a suction unit, which is connected to the suction channel via the filter unit and the dirt collection chamber to create a suction flow.With the help of the suction unit, the dirt collection chamber can be pressurized with negative pressure, so that suction air loaded with solid particles and / or liquid droplets can be drawn into the dirt collection chamber, whereby the solid particles and liquid droplets are separated from the suction air by means of the filter device and collected in the dirt collection chamber, and the suction air can then be released by the suction unit into the environment via air outlet openings of the second housing device.

[0004] A handheld vacuum cleaning device of the type mentioned above is known, for example, from US 4,894,882 A. Similarly designed vacuum cleaning devices are known from US 4,924,548 A and US 4,920,608 A.

[0005] These vacuum cleaning devices can be used to vacuum up solids, liquids, and solid-liquid mixtures. However, when operating these devices, it is important to ensure they are positioned in a specific orientation relative to the surface being cleaned, and thus in a specific orientation within the room. Otherwise, there is a risk that vacuumed liquid will leak from the device and / or reach the suction unit, potentially harming the user or disrupting the operation of the suction unit.

[0006] The object of the present invention is therefore to further develop a handheld vacuum cleaning device of the type mentioned above in such a way that it can be operated without interference in any orientation in the room.

[0007] This problem is solved according to the invention in a handheld vacuum cleaning device of the generic type by the fact that the filter housing in the dirt collection chamber is surrounded by an annular space and has an inlet opening on an end face facing the suction inlet, wherein the suction channel extends into the annular space and has a channel outlet arranged in the annular space, and wherein the inlet opening of the filter housing is offset from the channel outlet of the suction channel with respect to an axial extension direction of the dirt container towards the suction inlet. The vacuum cleaning device according to the invention is characterized, among other things, by the fact that the filter housing of the filter device in the dirt collection chamber is surrounded by an annular space and the suction channel extends from the suction inlet into the annular space. In the region of the annular space, the suction channel has a channel outlet through which the suction channel opens into the annular space of the dirt collection chamber.The annular space surrounds the filter housing, which has an inlet opening on an end face facing the suction inlet. The suction flow can enter the interior of the filter housing through this opening, flow through it, and then reach the suction unit. According to the invention, the inlet opening of the filter housing is offset from the outlet of the suction channel with respect to the axial extension of the dirt container towards the suction inlet. This results in the suction flow undergoing two deflections of approximately 180° within the dirt collection chamber. Starting from the suction inlet, the suction flow first extends through the suction channel and enters the annular space surrounding the filter housing via the channel outlet. The suction flow is then deflected by approximately...The suction flow is deflected 180° so that it can reach the inlet opening of the filter housing, which, relative to the axial direction of the dirt container, is positioned towards the suction inlet relative to the duct outlet. The suction flow then undergoes a second deflection of approximately 180° to enter the interior of the filter housing via the inlet opening, from where it can then reach the suction unit.

[0008] Within the dirt collection chamber, the suction flow thus exhibits an approximately meandering or essentially Z-shaped course originating from the suction channel. This results in solid particles and liquid droplets carried by the suction air being separated from the suction air simply due to the multiple deflections and the associated changes in velocity of the suction flow. Furthermore, the approximately meandering or essentially Z-shaped course of the suction flow allows the handheld vacuum cleaning device according to the invention to be operated in any orientation within the room. For example, the vacuum cleaning device can be operated in a horizontal or vertical orientation, with the suction inlet being oriented either upwards or downwards relative to the vertical.The suction cleaning device according to the invention can also be operated in any orientation inclined to the vertical or horizontal. This makes the suction cleaning device easier for the user to handle and expands its range of applications. With the help of the suction cleaning device, not only solid particles but also liquids and mixtures of solid particles and liquids can be vacuumed up from both horizontally and vertically oriented surfaces as well as from surfaces inclined to the horizontal or vertical, without the risk of liquid escaping from the suction cleaning device.

[0009] Different suction nozzles can be connected to the suction inlet, including a suction nozzle for cleaning glass surfaces, such as window panes.

[0010] It is advantageous to have a check valve at the outlet of the suction duct. This valve opens automatically when the suction flow is activated and closes automatically when the suction flow ceases. The check valve prevents solid particles and liquid droplets from entering the suction duct as soon as the vacuum cleaning unit is switched off. During operation, as explained above, a suction flow is created that flows through the suction duct. This suction flow moves the check valve into an open position, which it maintains during operation. When the vacuum cleaning unit is switched off, the suction flow ceases, and the check valve automatically closes, preventing solids or liquid droplets from entering the suction duct through the outlet.In a preferred embodiment of the invention, the check valve is designed as a diaphragm valve. Under the influence of the suction flow, the diaphragm valve automatically assumes its open position. When the suction flow ceases, the diaphragm valve automatically assumes its closed position.

[0011] It is advantageous if the filter housing is detachable within the dirt container of the first housing assembly. This allows the user to remove the filter housing from the dirt container and, if necessary, reinsert it after first separating the first housing assembly from the second, thus providing access to the dirt container. For example, the user can remove the filter housing from the dirt container to clean it and then reinsert it. Similarly, the user can replace the first filter housing with a second one if needed.

[0012] It is particularly advantageous if the filter housing can be inserted into and removed from the dirt container without tools. This makes it easier for the user to remove and replace the filter housing.

[0013] In a preferred embodiment of the invention, the filter device comprises a filter element arranged in the annular space downstream of the suction channel outlet. The filter element arranged in the annular space occupies a position between the suction channel outlet and the inlet opening of the filter housing. This filter element can, for example, be designed as a coarse filter, with the aid of which larger solid particles can be retained, such as sucked-up grains and / or grain flakes or other coarse-grained solids.

[0014] The filter element arranged in the annular space preferably comprises a sieve or grid. The grid can, for example, have several spaced-apart struts that define openings between them through which the suction flow can pass, retaining coarse-grained solids.

[0015] In an advantageous embodiment of the invention, the filter element arranged in the annular space is held on a filter holder that at least partially surrounds the filter housing in the circumferential direction.

[0016] In particular, it can be provided that the filter element arranged in the annular space is integrally connected to the filter holder. In such a design, the filter element arranged in the annular space, in combination with the filter holder, forms a one-piece component, preferably made of a plastic material.

[0017] It is advantageous if the filter holder rests against the outside of the filter housing. With this design, the outside of the filter housing forms a contact surface for the filter holder of the filter element located in the annular space. This allows for a particularly robust mechanical fixation of the filter element within the annular space of the dirt collection chamber surrounding the filter housing.

[0018] It is advantageous if the filter holder is detachable from the filter housing. This allows the user, for example, to separate the filter element and holder from the filter housing for cleaning. After cleaning, the filter element and holder can be reattached to the filter housing.

[0019] In an advantageous embodiment of the invention, the filter device comprises at least one filter element arranged in the filter housing. As already mentioned, the suction flow in the area between the duct outlet of the suction duct and the inlet opening of the filter housing has an approximately meandering or Z-shaped profile, so that solid particles and liquid droplets carried along with the suction air are already separated in the area between the duct outlet and the inlet opening due to the two deflections of the suction flow by approximately 180° each. Further separation of solid particles and liquid droplets can take place within the filter housing by means of the at least one filter element positioned in the filter housing.

[0020] Preferably, the at least one filter element arranged in the filter housing can be inserted into and removed from the filter housing. This allows the user to remove the at least one filter element from the filter housing, for example for cleaning purposes, and to reinsert it into the filter housing after cleaning.

[0021] It is advantageous if at least one filter element located in the filter housing can be inserted into and removed from the filter housing without tools.

[0022] At least one filter element arranged in the filter housing is preferably designed as filter foam or has a filter foam.

[0023] A soft, elastic, open-pored polyurethane-based filter foam is preferably used.

[0024] Alternatively and / or additionally, in an advantageous embodiment of the invention, at least one filter element arranged in the filter housing comprises an air-permeable, hydrophobic filter material. With the aid of the hydrophobic filter material, not only solid particles but also liquid droplets can be separated.

[0025] The hydrophobic filter material can be multi-layered. In particular, it can be provided that the hydrophobic filter material forms a cylindrical filter body of a filter cartridge, which can be inserted into the filter housing and removed from the filter housing, for example for cleaning purposes.

[0026] It is advantageous if the hydrophobic filter material forms a pleated filter. This makes it possible to provide a large filtration area despite a compact design.

[0027] As already mentioned, the suction unit applies negative pressure to the dirt collection chamber, creating a suction flow that draws solids and liquids into the chamber. It is advantageous if the suction unit has two operating modes that can be selected by the user, with the suction power differing between the first and second operating modes. In such a configuration of the vacuum cleaning device according to the invention, the user can choose between a first and a second operating mode, with the suction power differing between the two modes. For example, the suction unit may have a lower suction power in the first operating mode than in the second.For example, the user can select a first operating mode for vacuuming liquids, in which the suction unit has a lower suction power than in a second operating mode. This lower suction power can be factory-set to ensure that liquids are reliably vacuumed into the dirt collection chamber in the first operating mode, without the risk of, for example, very small liquid droplets reaching the suction unit. For vacuuming dry solids, the user can activate a second operating mode characterized by a higher suction power. This ensures that even powdery solids, such as flour, dust particles, and powders, or finely ground or crushed legumes, can be reliably vacuumed into the dirt collection chamber.

[0028] It is advantageous if the vacuum cleaning device has a user-operated control element for switching the device on and off and for selecting a desired operating mode. This control element can be, for example, a button or switch, or a touch-sensitive control surface.

[0029] In an advantageous embodiment, the vacuum cleaning device according to the invention has control electronics arranged in the second housing unit to control the suction unit. These electronics interact with the control element and the suction unit to switch the suction unit on and off and to selectively activate a predetermined operating mode.

[0030] In a preferred embodiment of the invention, the second housing unit accommodates at least one electric battery for supplying power to the suction unit. This enables cordless operation of the vacuum cleaning device and thus simplifies its handling.

[0031] It is advantageous if the second housing unit has a handle. The user can grasp the handle to operate the vacuum cleaning device and guide it along the surface to be cleaned.

[0032] Preferably, at least one rechargeable electric battery is arranged in the handle. This allows for a particularly compact design of the vacuum cleaning device. The following description of an advantageous embodiment of the invention, in conjunction with the drawing, serves for further explanation. The drawing shows:

[0033] Figure 1: a perspective view of an advantageous embodiment of a handheld vacuum cleaning device to which a suction nozzle is attached;

[0034] Figure 2: a longitudinal sectional view of the vacuum cleaning device and the suction nozzle from Figure 1;

[0035] Figure 3: a perspective view of the vacuum cleaning device and the suction nozzle from Figure 1 in the style of an exploded view;

[0036] Figure 4: a longitudinal sectional view of a first housing assembly of the vacuum cleaning device from Figure 1, to which the suction nozzle is connected;

[0037] Figure 5: a sectional view of the first housing assembly from Figure 4 along line 5-5;

[0038] Figure 6: a perspective view of a filter element in combination with a filter holder of the vacuum cleaning device from Figure 1.

[0039] The drawing schematically illustrates an advantageous embodiment of a handheld vacuum cleaning device according to the invention for vacuuming solids, liquids, and solid-liquid mixtures, and is designated by reference numeral 10. The vacuum cleaning device 10 is suitable for both dry and wet operation and can be held by the user with one hand and moved along the surface to be cleaned. The vacuum cleaning device 10 has a housing 12 comprising a first housing unit 14 and a second housing unit 16. The two housing units 14 and 16 are detachably connected to each other.The detachable connection can, for example, be designed in the form of a bayonet connection, wherein first bayonet connection elements are arranged on the first housing device 14, which interact with second bayonet connection elements arranged on the second housing device 16 to form the bayonet connection. Such bayonet connection elements are known to those skilled in the art and therefore do not require further explanation here.

[0040] The first housing assembly 14 has a dirt container 18 and a nozzle support part 20 that partially surrounds the dirt container 18 in the circumferential direction.

[0041] The dirt container 18 has a substantially hollow cylindrical rear container section 19, the central axis of which defines an axial extension direction 21 of the dirt container 18, and a beak-like front container section 23, which is integrally connected to the rear container section 19 and tapers with increasing distance from the rear container section and is inclined towards the axial extension direction 21. The dirt container surrounds a dirt collection chamber 22 and has a suction inlet 24, to which a suction channel 26 is connected.

[0042] A suction nozzle 28 can be connected to the suction inlet 24 and fixed to it by means of the nozzle support 20. An outlet pipe 30 of the suction nozzle 28 engages in the suction channel 26. Depending on the application, different suction nozzles can be connected to the suction inlet 24, including a suction nozzle for cleaning glass surfaces, such as window panes. A filter assembly 32 is arranged in the dirt collection chamber 22. The filter assembly 32 has a filter housing 34, which is essentially hollow and cylindrical. It has an inlet opening 38 on an end face 36 facing the suction inlet 24 and a partition 40 on its rear side facing away from the end face 36. This partition forms a boundary wall 40 that delimits the dirt collection chamber 22 on the rear side facing away from the suction inlet 24.

[0043] Within the dirt collection chamber 22, the filter housing 34 is surrounded circumferentially by an annular space 42, which extends from the front face 36 of the filter housing 24 to the partition wall 40.

[0044] The suction channel 26 extends from the suction inlet 24 into the region of the annular space 42, with a channel outlet 44 of the suction channel 26, facing away from the suction inlet 24, being arranged approximately centrally in the longitudinal direction of the annular space 42. A check valve 46, designed as a diaphragm valve 48, is arranged at the channel outlet 44.

[0045] Within the annular space 42, a first filter element 50 is arranged directly adjacent to the end face 36 of the filter housing 34. In the illustrated embodiment, this filter element has a grid 52 with several parallel struts 54, each defining a filter opening 56 between them. The first filter element forms a coarse filter for separating coarse-grained solid particles.

[0046] The first filter element 50 is held on a filter holder 58, which surrounds the filter housing 34 circumferentially and rests directly against the outside of the filter housing 34. The filter holder 58 has a substantially C-shaped cross-section and extends from the partition 40 to the first filter element 50, with the first filter element 50 being integrally connected to the filter holder 58, so that the first filter element 50, in combination with the filter holder 58, forms a single component, which in the illustrated embodiment is designed as a molded plastic part. A second filter element 60 and a third filter element 64 are arranged inside the filter housing 34. The second filter element 60 is designed as a soft, elastic, open-cell polyurethane-based filter foam 62.

[0047] The third filter element 64 rests against the side of the second filter element 60 facing away from the inlet opening 38 and is designed as a filter cartridge comprising an air-permeable, hydrophobic filter material 66. The filter material 66 preferably forms a pleated filter 67. This allows for a large filtration area despite the compact design. The third filter element 64 extends to a passage opening 68 in the partition 40 and, like the second filter element 60, can be removed from the filter housing 34 without tools and reinserted into the filter housing 34 without tools, provided that the first housing assembly 14 is first separated from the second housing assembly 16.

[0048] Similarly, the filter housing 34 together with the partition 40 of the first housing unit 14 can be removed without tools if required and can also be reinserted into the first housing unit 14 without tools after the first housing unit 14 has been separated from the second housing unit 16.

[0049] The filter holder 58 of the first filter element 50 is detachably held on the outside of the filter housing 34 and can also be removed from the first housing assembly 14 without tools and reinserted without tools.

[0050] The second housing assembly 16 surrounds a suction unit 70, which comprises a suction turbine 72 and an electric motor 74, the electric motor 34 driving the suction turbine 72. The suction unit 70 is aligned with the passage opening 68 of the partition 40 and is in flow communication with the suction inlet 24 via the filter housing 34, the dirt collection chamber 22, and the suction channel 26, so that the dirt collection chamber 22 can be pressurized by the suction unit 70, creating a suction flow that extends from the suction inlet 24 via the suction channel 26, the dirt collection chamber 22, and the filter housing 34 to the suction unit 70. Under the influence of the suction flow, solid particles and liquids can be drawn into the dirt collection chamber 22, whereby coarse-grained solids are separated at the first filter element 50 and finer-grained solids are separated at the second filter element 60 and at the third filter element 64.

[0051] The suction flow undergoes two 180° deflections on its path from the channel outlet 44 of the suction channel 26 to the inlet opening 38 of the filter housing 34. Starting from the suction channel 26, the suction flow enters the annular space 42 via the channel outlet 44. In the annular space 42, the suction flow can flow around the filter housing 34 in both the circumferential and longitudinal directions, deflecting by 180° in the process. The suction flow then reaches the inlet opening 38 of the filter housing 34, undergoing another 180° deflection on its way from the annular space 42 to the inlet opening 38, before finally flowing through the filter housing 34. The suction flow thus exhibits an approximately meandering or essentially Z-shaped course within the dirt collection chamber 22.

[0052] The double redirection of the flow direction by 180° each time within the dirt collection chamber 22 results in liquid droplets being separated from the suction flow, which collect on the partition wall 40 and on the wall of the dirt container 18. At the same time, solid particles are separated, as already explained above, at the first filter element 50, the second filter element 60 and the third filter element 64, whereby the hydrophobic filter material 66 of the third filter element 64 ensures that even very small liquid droplets are retained and cannot reach the suction unit 70.

[0053] The second housing unit 16 has a handle 80 on its rear side 78, facing away from the first housing unit 14. This handle can be gripped by the user to hold the vacuum cleaning device 10 with one hand and guide it along a surface to be cleaned. A first rechargeable battery 82 and a second rechargeable battery 84 are arranged in the handle 80, providing power to the vacuum unit 70.

[0054] Furthermore, the handle 80 accommodates a control unit 86. The suction unit 70 can be controlled by means of the control unit 86. The control unit 86 interacts with an operating element 90, which is arranged on the second housing unit 16 at a short distance from the first housing unit 14 and can be operated by the user. Preferably, the operating element 90 has a touch-sensitive operating surface.

[0055] The control unit 86 allows the suction unit 70 to be operated in either a first or a second operating mode. In the first operating mode, the suction unit 70 has a lower suction power than in the second. The user can select either the first or the second operating mode using the control element 90. The first operating mode can be used, for example, to vacuum liquids from a surface to be cleaned, while the second operating mode can be used, for example, to vacuum dry solids, especially fine-grained solids, from a surface to be cleaned. Naturally, a mixture of solids and liquids can also be vacuumed from a surface to be cleaned in the first operating mode or, optionally, in the second operating mode.

[0056] As explained above, the suction flow generated by the suction unit 70 within the dirt collection chamber 22 has an approximately meandering or essentially Z-shaped course, which ensures that liquid droplets are reliably separated from the suction flow, while the use of the filter elements 50, 60 and 64 simultaneously ensures that both coarse and fine solid particles are separated and collected in the dirt collection chamber 22.

[0057] If necessary, liquid can be emptied from the dirt collection chamber 22 via a container opening 92 of the dirt container 18, which can be closed by means of a sealing plug 94.

[0058] Solid particles that collect in the dirt collection chamber 22 can be easily removed from the dirt container 18 by the user. This simply requires separating the first housing assembly 14 from the second housing assembly 16 and then removing the filter housing 34 and the first filter element 50 from the first housing assembly 14, so that the dirt container 18 can then be emptied and rinsed if necessary. The first filter element 50 can be removed from the filter housing 34 and, for example, rinsed. Similarly, the second filter element 60 and the third filter element 64 can be removed from the filter housing 34 and cleaned.After cleaning, the second filter element 60 and the third filter element 64 can be reinserted into the filter housing 34, and the first filter element 50, together with the filter holder 58, can be placed onto the filter housing 34 and then inserted, along with the filter housing 34, into the first housing assembly 14. Finally, the first housing assembly 14 can be reconnected to the second housing assembly 16, so that the operation of the vacuum cleaning device 10 can then be resumed.

[0059] The vacuum cleaning device 10 can be operated in any orientation relative to the vertical and horizontal planes without any risk of liquid escaping from the vacuum cleaning device 10 or reaching the suction unit 70 or the control unit 86. For example, the vacuum cleaning device 10 can be operated in a vertical orientation, with the suction inlet 24 facing upwards or downwards. Operation in a horizontal orientation is also possible, as is operation of the vacuum cleaning device 10 at any angle to the vertical and horizontal planes.

Claims

P A T E N T A N S P R Ü C H E 1. Handheld vacuum cleaning device for vacuuming solids, liquids and solid-liquid mixtures comprising a device housing (12) with a first housing unit (14) and a second housing unit (16) detachably connectable to the first housing unit (14), wherein the first housing unit (14) has a dirt container (18) with a dirt collection chamber (22) and a suction inlet (24) to which a suction channel (26) is connected, wherein a filter unit (32) is arranged in the dirt collection chamber (22) with a filter housing (34) and at least one filter element (50, 60, 64), and wherein the second housing unit (16) accommodates a suction unit (70) which is in flow communication with the suction channel (26) via the filter unit (32) and the dirt collection chamber (22) to form a suction flow, characterized in thatthat the filter housing (34) in the dirt collection chamber (22) is surrounded by an annular space (42) and has an inlet opening (38) on an end face (36) facing the suction inlet (24), wherein the suction channel (26) extends into the annular space (42) and has a channel outlet (44) arranged in the annular space (42), and wherein the inlet opening (38) of the filter housing (34) is arranged offset from the channel outlet (44) of the suction channel (26) with respect to an axial extension direction (21) of the dirt container (18) in the direction of the suction inlet (24).

2. Handheld suction cleaning device according to claim 1, characterized in that a check valve (46) is arranged at the channel outlet (44) of the suction channel (26), which opens automatically when subjected to the suction flow and closes automatically when the suction flow ceases.

3. Handheld vacuum cleaning device according to claim 2, characterized in that the check valve (46) is designed as a diaphragm valve (48).

4. Handheld vacuum cleaning device according to one of the preceding claims, characterized in that the filter housing (34) is detachably held in the dirt container (18).

5. Handheld vacuum cleaning device according to one of the preceding claims, characterized in that the filter device (32) has a filter element (50) arranged in the annular space (42) downstream of the channel outlet (44) of the suction channel (26).

6. Handheld vacuum cleaning device according to claim 5, characterized in that the filter element (50) arranged in the annular space (42) has a sieve or grid (52).

7. Handheld vacuum cleaning device according to claim 5 or 6, characterized in that the filter element (50) arranged in the annular space (42) is held on a filter holder (58) which at least partially surrounds the filter housing (34) in the circumferential direction.

8. Handheld vacuum cleaning device according to claim 7, characterized in that the filter holder (58) rests against the outside of the filter housing (34).

9. Handheld vacuum cleaning device according to claim 7 or 8, characterized in that the filter holder (58) is detachably held on the filter housing (34).

10. Handheld vacuum cleaning device according to one of the preceding claims, characterized in that the filter device (32) has at least one filter element (60, 64) arranged in the filter housing (34).

11. Handheld vacuum cleaning device according to claim 10, characterized in that the at least one filter element (60, 64) arranged in the filter housing (34) can be inserted into the filter housing (34) and removed from the filter housing (34).

12. Handheld vacuum cleaning device according to claim 10 or 11, characterized in that at least one filter element (60) arranged in the filter housing (34) is or comprises a filter foam (62).

13. Handheld vacuum cleaning device according to claim 10, 11 or 12, characterized in that at least one filter element (64) arranged in the filter housing (34) has an air-permeable, hydrophobic filter material (66).

14. Handheld vacuum cleaning device according to one of the preceding claims, characterized in that the suction unit (70) has two operating modes which can be selectively activated by the user, wherein the suction unit (70) has a different suction power in a first operating mode than in a second operating mode.

15. Handheld vacuum cleaning device according to claim 14, characterized in that the vacuum cleaning device (10) has a user-operated control element (90) for switching the vacuum cleaning device (10) on and off and for selectively activating a desired operating mode.

16. Handheld vacuum cleaning device according to claim 15, characterized in that the vacuum cleaning device (10) has a control device (86) arranged in the second housing device (16), which interacts with the control element (90) and the suction unit (70) to switch the suction unit (70) on and off and to selectively activate an operating mode of the suction unit (70).

17. Handheld vacuum cleaning device according to one of the preceding claims, characterized in that the second housing device (60) accommodates at least one electrical battery (82, 84) for powering the vacuum unit (70).

18. Handheld vacuum cleaning device according to one of the preceding claims, characterized in that the second housing device (60) has a handle (80).

19. Handheld vacuum cleaning device according to claim 18, characterized in that at least one rechargeable electric battery (82, 84) for supplying energy to the vacuum unit (70) is arranged in the handle (80).

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