WO2024218363A1 - Suction device - Google Patents

Abstract

The invention relates to a suction device that has a dirt suction opening, through which dirt can be suctioned into the suction device from the outside, and a clean air outlet opening, through which filtered air flows out, said dirt suction opening being formed on a suction part which has a liquid separator or is designed as a liquid separator and which has a suction part housing and is releasably coupled to a drive part that has a fan and the clean air outlet opening. The suction device is characterized in that the suction part has a liquid separator or is designed as a liquid separator, wherein the suction part has a suction tube which has a suction tube inlet opening and a suction tube outlet opening and through which suctioned dirt flows together with suctioned air and/or liquid, and the dirt suction opening is formed by the suction tube inlet opening or is fluidically connected to the suction tube inlet opening. The suction device is additionally characterized in that the suction tube freely terminates in the suction part housing, and/or the suction part is equipped with a filter housing which has a filter housing inlet opening and a filter housing outlet opening and contains a filter for removing dirt from the air flow. An end section of the filter housing, said end section having the filter housing inlet opening, freely terminates in the suction part housing.

Description

suction device

The invention relates to a suction device which has a dirt intake opening through which air and dirt can be sucked into the suction device from the outside, and which has a clean air outlet opening through which filtered air flows out, wherein the dirt intake opening is formed on a suction part which has a liquid separator or is designed as a liquid separator and which has a suction part housing and which is detachably coupled to a drive part which has a fan and the clean air outlet opening, wherein the suction part has a suction pipe which has a suction pipe inlet opening and a suction pipe outlet opening and through which sucked-in protection flows together with sucked-in air and/or liquid, wherein the dirt intake opening is formed by the suction pipe inlet opening or is fluidically connected to the suction pipe inlet opening.

Vacuum cleaners can pick up dust or dry dirt from smooth and rough surfaces. Smaller vacuum cleaners, often battery-operated, are often used as table vacuum cleaners and to vacuum up minor local dirt.

From EP 3 323 333 A1 a vacuum cleaner of the type mentioned at the outset is known, which has a housing and a blower arrangement which is designed to generate an air flow. A removable dirt container can be mounted on the housing. The dirt container has a dirty air inlet which is in fluid communication with the blower arrangement. A filter serves to separate dirt from the air flow, wherein the filter is mounted between the dirt container and the blower arrangement. The housing comprises at least one air outlet for discharging clean air from the blower arrangement. The removable dirt container has a protruding lip which is arranged such that it overlaps the air outlet and directs the air flow away from the dirty air inlet.

From US 4 536 914 a wet/dry vacuum cleaner is known which is designed for use in both dry and wet operation. The wet/dry vacuum cleaner consists of a housing which encloses a fan and a motor for driving the fan, the wet/dry vacuum cleaner further comprising a container with a nozzle and a storage chamber below the nozzle, the container being detachably attachable to the front end of the housing. At the front end of the housing there is an intake opening for sucked air, the opening having a liquid-repellent hood extending from its upper part into the container to deflect any liquid emerging from a rear opening of the nozzle into the container. The intake opening for the intake air to enter the fan is formed in a partition which extends across the housing. It is therefore the object of the present invention to provide a suction device in which the risk of sucked-in liquid escaping from the suction part back into the open air and/or into the drive part is at least reduced.

The object is achieved by a suction device which is characterized in that a. the suction pipe ends freely in the suction part housing, and/or that b. a filter housing is arranged in the suction part, which has a filter housing inlet opening and a filter housing outlet opening and which contains a filter for removing dirt from the air flow, wherein an end section of the filter housing which has the filter housing inlet opening ends freely in the suction part housing.

The suction device according to the invention has the very special advantage that not only dry suction material can be sucked in, but also liquids, for example drinks accidentally spilled on the table, whereby it is advantageous in particular to also suck in solid dirt particles, such as bread crumbs, together with the liquid. The invention also makes it possible, for example, to remove the mixture of mud, stones and water that is left on the floor when a house is entered with wet, dirty shoes.

In the suction device according to the invention, any liquid (depending on the type of contamination to be removed) contained in the sucked-in fluid flow is separated (at least for the most part) from the fluid flow by means of the liquid separator. The term liquid separator refers to a device that separates liquid from a fluid flow and/or ensures that separated liquid remains separated from the fluid flow. In a special embodiment, the liquid separator also has the task of ensuring that as little liquid as possible gets into an air filter downstream of the liquid separator in the fluid flow, in particular a suspended matter filter, especially a HEPA filter, and/or into a fan downstream of the liquid separator in the fluid flow and/or is expelled through the clean air outlet opening.

The liquid separator can have several liquid separator stages, which are preferably connected in series. In particular, the liquid separator can consist of several liquid separator components, which, due to their nature and/or their arrangement, help to separate liquid from the fluid flow and/or to keep already separated liquid separated from the fluid flow. In this case, it is advantageously possible for at least one of the liquid separator components to be replaced by a component of the suction device. which, in addition to being part of the liquid separator, also has at least one other function. Such a design requires very few components and can therefore be designed to be particularly compact and easy to handle.

The liquid separator can advantageously also be designed to separate not only liquid but also dirt particles that exceed a certain size and/or a certain mass from the fluid flow. This can advantageously be dirt particles that have a diameter of more than 0.5 mm or more than 1 mm or more than 2 mm and/or that have a mass of more than 1 mg or more than 2 mg. For example, the liquid separator can be designed to separate dirt particles from the fluid flow that accumulate on a dining table, such as cornflakes, oat flakes, bread crumbs and the like, and/or to separate dirt particles from the fluid flow that accumulate on a floor, such as grit, pebbles, sand or the like.

The feature that the suction pipe ends freely in the suction part housing means that one end of the suction pipe, in particular the end of the suction pipe which has the suction pipe outlet opening, is arranged at a distance from the suction part inner wall. This advantageously ensures that sucked-in liquid which sloshes along the suction part inner wall when the suction device is moved cannot get back into the suction pipe. Rather, at least the majority of the liquid can at most get between the suction part inner wall and the suction pipe, which is not relevant with regard to the risk of the liquid accidentally escaping. The suction part inner wall can be the inner wall of the suction part housing or the inner wall of a suction part receiving space arranged in the suction part housing or the inner wall of a container arranged in the suction part housing. The feature that the suction pipe ends freely in the suction part housing is also advantageous if at least one additional means, for example a closure flap arranged at the end of the suction pipe, is present which counteracts the leakage of liquid, since the at least one additional means cannot generally prevent leakage 100%. For example, the wet-dry vacuum cleaner known from US 4,536,914 has the disadvantage that its closure flap is activated by the negative pressure in the suction part and is always open when the device is switched on, so that liquid can escape if the device is used overhead when it is switched on.

The feature that an end section of the filter housing, which has the filter housing inlet opening, ends freely in the suction part housing, means that the end section of the filter housing, which has the filter housing inlet opening, is arranged at a distance from the suction part inner wall. This advantageously ensures that sucked-in liquid, which sloshes along a suction part inner wall when the suction device is moved, does not enter the filter housing (and thus into the filter and/or the drive part). Rather, at least the majority of the liquid can at best get between the inner wall of the suction part and the filter housing, which is not relevant in terms of the risk of the liquid accidentally escaping. The inner wall of the suction part can, as already mentioned, be the inner wall of the suction part housing or the inner wall of a receiving space for the suction part arranged in the suction part housing or the inner wall of a container arranged in the suction part housing. For example, the wet/dry vacuum cleaner known from US 4 536 914 has the disadvantage that the liquid, for example when vacuuming the underside of a ceiling, gets directly into the air filter and through this into the fan.

The suction device according to the invention has the further very special advantage that (apart from possible accessories, such as special suction attachments) it can consist essentially only of two components, namely the suction part and the drive part, which enables it to be used easily and quickly. In addition, the suction device according to the invention can be made very compact due to its special design, whereby in a particularly advantageous manner it can be designed as a hand-held device that can be used with one hand.

In a special embodiment, the suction part has a receiving space for dirt (in particular for larger dirt particles such as bread crumbs, stones and the like) and sucked-in liquid. The receiving space can advantageously be formed at least partially by at least a part of the suction part housing.

A design in which the suction part, in particular adjacent to the dirt suction opening, has a receiving space for dirt and sucked-in liquid, is particularly advantageous because, among other things, the suction device is usually held at an angle during suction operation (apart from cleaning ceilings, walls or windows) and with the suction part pointing downwards, so that sucked-in protective particles and liquid only have to be lifted against the force of gravity for a short distance by means of the fluid flow before they reach the receiving space.

The dirt suction opening is the opening of the suction part which is designed to be brought directly closer to the surface on which the dirt and/or liquid to be sucked in is located. In particular, it is provided that a dirt suction opening edge surrounding the dirt suction opening is brought directly closer to the surface or brought into contact with the surface on which the dirt and/or liquid to be sucked in is located. However, it is also possible to attach an attachment, for example a suction nozzle, a wiping nozzle or a brush nozzle, to to connect the dirt intake opening to perform special cleaning tasks.

In a particularly advantageous design, the emptying opening is arranged next to the dirt intake opening. This is particularly advantageous because the vacuum cleaner is usually held at an angle during suction operation and with the dirt intake opening pointing downwards, so that the user does not have to change the orientation for emptying

The receiving space can advantageously have an automatically operating closure device that opens or closes the container depending on the current orientation of the suction device and/or depending on the operating state of the suction device. For example, the closure device can be designed to open or close a receiving space access depending on the direction of the weight force acting on a closure device weight body. In this way, it is advantageously achieved that the receiving space is automatically closed if the user aligns the suction device in such a way that liquid would leak out of the receiving space through the receiving space access. Alternatively or additionally, it is also possible, for example, for the closure device to have a spring-loaded and/or elastic closure flap that opens automatically due to the fluid flow when the suction device is in operation and closes automatically when the suction device is switched off.

The closure device has the particular advantage that sucked-in liquid remains in the receiving space and in particular does not enter an air filter, in particular a suspended matter filter, especially a HEPA filter, arranged downstream of the liquid separator in the fluid flow and/or a fan or is expelled through the clean air outlet opening.

In a particularly reliable and robust design, the receiving space is formed by a container arranged in the suction part housing. This design is particularly reliable because any liquid that may leak out of the container (despite all measures to prevent this) does not leak out to the outside, but only into the suction part housing. In particular, it can advantageously be provided that the container has an automatically operating closing device that opens or closes the container depending on the current orientation of the suction device. For example, the closing device can be designed to open or close a receiving space access designed as a container access depending on the direction of the weight force acting on a closing device weight body. In this way, it is advantageously achieved that the container is automatically closed when the user aligns the suction device in such a way that liquid can escape from the container would leak. Alternatively or additionally, it is also possible, for example, for the closure device to have a spring-loaded and/or elastic closure flap that opens automatically when the suction device is in operation due to the fluid flow and closes automatically when the suction device is switched off. This prevents dirt particles and/or liquid that have been sucked in from getting back out through the suction pipe, particularly when the suction device is switched off.

In an advantageous embodiment, the suction part has a suction part outlet opening through which air can flow into the drive part. In particular, it can advantageously be provided that the suction part outlet opening is automatically arranged opposite a drive part inlet opening when the suction part is coupled to the drive part.

In an advantageous embodiment, the suction part has an emptying opening through which dirt and sucked-in liquid can be removed from the suction part. Preferably, the emptying opening is not formed by the suction part outlet opening, but rather preferably a separate opening in the suction part housing. Such an embodiment has the very special advantage that the user can empty the receiving space for dirt and sucked-in liquid without having to uncouple the suction part from the drive part.

The drain opening is preferably arranged outside the fluid flow. Such a design has the very special advantage that a drain opening closure, by means of which the drain opening can be closed, and in particular the seals of the drain opening closure, are not stressed by the fluid flow. In particular, this advantageously prevents liquid and/or air from being accidentally pushed out past the seal of the drain opening closure due to the effect of the fluid flow.

In a particularly advantageous embodiment, the emptying opening is arranged adjacent to the dirt suction opening. Alternatively or additionally, the emptying opening can be arranged at the end of the preferably elongated suction part on which the dirt suction opening is also arranged. These embodiments are particularly advantageous because the suction device is usually held at an angle during suction operation and with the dirt suction opening pointing downwards, so that the user does not have to change the orientation for emptying.

Preferably, a drain opening closure is provided, by means of which the drain opening can be closed in a liquid-tight manner. The drain opening closure can be designed as a flap, for example. Preferably, the flap is closed by means of a hinge so that it is pulled into an open position by the force of weight when the vacuum cleaner is held at an angle (as in vacuuming mode) with the dirt intake opening facing downwards. With such a design, the user only has to unlock the flap to empty it, so that it then automatically falls into the open position.

The emptying opening closure can alternatively be designed, for example, as a screw cap or as a snap-in cap.

In a particularly advantageous embodiment, the drain opening closure is designed to be operated without tools. For example, the drain opening closure can have a flap pivoted on a hinge with a seal running around the edge and a spring-loaded latch, whereby the latch automatically engages in a locking position when the flap is pressed into the closed position. To open it, the user can move the latch against the spring force in an opening position, which releases the flap for opening.

In a particularly handy and compact design, the suction part is elongated, in particular cylindrical. In this case, it can be advantageously provided, in particular for the implementation of the above-mentioned principles, that the suction part has the dirt suction opening at one end and the suction part outlet opening at its other end.

Preferably, the suction part is coupled to the drive part in a way that is detachable without tools and without destruction, or can be coupled to the drive part.

In an advantageous embodiment, the suction part is releasably coupled to the drive part or can be coupled to the drive part by means of a coupling device. In particular, the coupling device can have at least one coupling element arranged on the suction part, in particular on the suction part housing of the suction part, and at least one counter-coupling element arranged on the drive part, in particular on a drive part housing of the drive part.

For example, the coupling element and the counter-coupling element can be mechanically and/or magnetically connected when the suction part is coupled to the drive part.

The coupling element can, for example, have a locking recess or a locking opening, in particular in the suction part housing, into which a locking projection of the drive part engages when the suction part is coupled to the drive part. Conversely, it is of course also possible, for example, for the counter-coupling element to have a locking recess or a locking opening, in particular in the drive part housing, into which a locking projection of the suction part engages when the suction part is coupled to the drive part.

The coupling element can advantageously be arranged as a component of the suction part in the region of the suction part outlet opening, while the counter-coupling element can be arranged as a component of the drive part in the region of a drive part inlet opening.

In a particularly advantageous embodiment - and according to an independent inventive concept that can be implemented in combination with at least one of the other features mentioned in this application or independently of the other features mentioned in this application - the counter-coupling element on the drive part is designed to be remotely controlled. For example, a release button that is mechanically coupled to the counter-coupling element can be provided, particularly in the area of a handle on the drive part. In such an embodiment, the user can release the locking of the coupling device by pressing the release button in order to be able to release the suction part from the drive part. In particular, if the release button is arranged in the area of the handle, the user can continue to hold the suction device by the handle with one hand (as in a cleaning process) while removing the suction part from the drive part with the other hand. The user can then, for example, remove and clean a filter arranged in the suction part.

In a special design, a filter housing is arranged in the suction part, which has a filter housing inlet opening and a filter housing outlet opening and which contains a filter, in particular a suspended matter filter, for removing dirt from the air flow. In particular, it can advantageously be provided that the filter, for example in the form of a filter cartridge, is held in the filter housing by positive insertion. Such a design allows the filter to be removed from the filter housing without causing any damage and without tools and to be reinserted into the filter housing, for example after a cleaning process.

Preferably, the filter is designed as a reusable filter that can be reinserted into the vacuum cleaner after each filter cleaning process. This has the particular advantage that the user does not have to replace the filter with a new one each time it becomes dirty. This also has the particular advantage that the filter does not have to be replaced if liquid gets into the filter despite the liquid separator. In particular, the filter can be designed to be washable. The filter is preferably also designed to remove dirt particles from the air stream after the liquid contained in the sucked-in fluid (or at least a large part of the liquid) and possibly larger dirt particles have already been removed by means of the liquid separator. In particular, the filter can be designed as an EPA filter (Efficient Particulate Air Filter) or as a HEPA filter (High-Efficiency Particulate Air Filter).

In a particularly advantageous embodiment, the filter housing inlet opening is arranged adjacent to the suction part housing in such a way that a gap, in particular an annular gap, is formed between the edge of the filter housing inlet opening and the suction part housing. The gap can advantageously have a gap width in the range from 1 mm to 10 mm, in particular in the range from 1 mm to 5 mm. Such a gap width is sufficient to suck in air, but at the same time very narrow to prevent liquid from being sucked into the filter housing together with the air. This special arrangement of the filter housing inlet opening has the very special advantage that sucked-in liquid remains in the receiving space and in particular does not get into an air filter, in particular a HEPA filter, connected downstream of the liquid separator in the fluid flow and/or into a fan or is expelled through the clean air outlet opening.

In order to prevent the penetration of coarser dirt particles into the filter housing, a sieve, in particular a stainless steel sieve, can be inserted into the filter housing inlet opening, in particular in a way that can be removed again non-destructively and/or without tools.

In a particularly advantageous embodiment - and according to an independent inventive concept that can be implemented in combination with at least one of the other features mentioned in this application or independently of the other features mentioned in this application - the filter housing or at least the part of the filter housing that has the filter housing inlet opening is arranged to be movable relative to the suction part housing. In this case, it can advantageously be provided that the suction device has an automatically operating alignment device that always automatically aligns the filter housing or at least the part of the filter housing that has the filter housing inlet opening in such a way that the filter housing inlet opening is directed upwards. In particular, the alignment device can be designed in such a way that it aligns the filter housing or at least the part of the filter housing that has the filter housing inlet opening depending on the direction of the weight force acting on an alignment device weight body. In these embodiments, it is advantageously exploited that the liquid sucked in always flows downwards in the suction part following the weight force. Since in these designs the filter housing inlet opening is always open regardless of the orientation of the suction device, is directed upwards, the penetration of liquid into the filter housing is effectively prevented in this way. In this respect, this design also has the very special advantage that sucked-in liquid remains in the receiving space and in particular does not reach an air filter, in particular a HEPA filter, downstream of the liquid separator in the fluid flow and/or a fan or is expelled through the clean air outlet opening.

The filter housing can have a filter housing cover that can be removed, in particular non-destructively and/or without tools, and which has the filter housing outlet opening. In this embodiment, the user can first insert the filter, in particular in the form of a filter cartridge, into the filter housing and then close the filter housing with the filter housing cover, wherein the filter housing cover can be designed in such a way that it secures the filter inserted into the filter housing in its position radially and/or axially. The filter housing can then be inserted into the suction part housing, in particular through the suction part outlet opening, in particular in a form-fitting manner.

In general, it can advantageously be provided that the filter housing is or can be inserted into the suction part housing in a form-fitting manner, in particular in a way that is removable again without tools and/or without destruction.

In a special embodiment, the filter housing is inserted into the suction part housing through the suction part outlet opening and can be removed again through the suction part outlet opening, for example for a cleaning process.

In a particularly advantageous embodiment, a suction pipe, in particular a straight one, is arranged in the suction part, through which sucked-in dirt flows together with sucked-in air and/or liquid. The suction pipe can have a suction pipe inlet opening and a suction pipe outlet opening. In particular, it can advantageously be provided that the dirt suction opening is formed by the suction pipe inlet opening or that the suction pipe inlet opening is fluidically connected to the dirt suction opening. In such an embodiment, all dirt sucked in through the dirt suction opening, all air sucked in through the dirt suction opening and all liquid sucked in through the dirt suction opening first passes through the suction pipe. The suction pipe can advantageously be at least partially part of the liquid separator.

In general, the liquid separator can have at least one labyrinth. In particular, it can advantageously be provided that at least a part of the labyrinth is formed by the arrangement of the suction pipe relative to the filter housing and/or by the arrangement of the suction pipe relative to the suction part housing.

Alternatively or additionally, as already described above, it can advantageously be provided that at least part of the labyrinth is formed by the arrangement of the suction pipe relative to the suction part housing.

In particular, the formation of a labyrinth can be achieved by arranging the suction pipe and the filter housing axially and/or radially overlapping next to one another.

A labyrinth, in particular such an axial and/or radial overlap of the suction pipe and the filter housing, can be achieved, for example, in that the distance of the filter housing inlet opening to the dirt suction opening is smaller than the distance of the suction pipe outlet opening to the dirt suction opening, and/or in that the distance of the filter housing inlet opening to the suction pipe inlet opening is smaller than the distance of the suction pipe outlet opening to the suction pipe inlet opening and/or in that the distance of the filter housing inlet opening to the suction pipe inlet opening is smaller than the length of the suction pipe. Alternatively or additionally, it can be provided for this purpose that the distance of the suction pipe outlet opening to the drive part is smaller than the distance of the filter housing inlet opening to the drive part, and/or that the distance of the suction pipe outlet opening to the filter housing outlet opening is smaller than the distance of the filter housing inlet opening to the filter housing outlet opening, and/or that the distance of the suction pipe outlet opening to the filter housing outlet opening is smaller than the length of the filter housing.

According to a possible alternative of the present invention, the suction pipe, in particular the end of the suction pipe which has the suction pipe outlet opening, ends freely in the suction part housing. In particular, it can advantageously be provided that the suction pipe, in particular the end of the suction pipe which has the suction pipe outlet opening, ends freely in the receiving space for the liquid and/or in the container.

In a special design, the suction pipe outlet opening is arranged in the receiving space for dirt and sucked-in liquid or immediately adjacent to the receiving space for dirt and sucked-in liquid. This has the advantage that the sucked-in dirt, together with the sucked-in liquid, reliably reaches the receiving space and remains there (until it is emptied).

Opposite the suction pipe outlet opening, a baffle surface can advantageously be arranged against which the sucked-in fluid and the sucked-in dirt bounce. The baffle surface can for example, be part of an outer surface of the filter housing. The sucked-in liquid adheres to the impact surface and then drips off and remains in the receiving space. Larger sucked-in dirt particles lose their kinetic energy by impacting the impact surface and also remain in the receiving space. Sucked-in air and smaller dirt particles, on the other hand, remain in the fluid flow and then preferably pass through a filter, in particular arranged in a filter housing, which removes the remaining dirt from the air. The air is then expelled from the suction device through at least one clean air outlet opening.

In a particularly handy and compact design, the drive part is elongated, in particular at least partially cylindrical.

The drive part can have a main body and a handle, in particular arranged directly adjacent to the main body. In this case, the main body can advantageously be elongated and/or essentially cylindrical, in particular with a view to a compact and easy-to-handle design.

The handle can be elongated and/or essentially cylindrical. In particular, it can advantageously be provided that the handle has a free end. Such a design allows the suction device to be held and operated easily.

A version of the suction device in which the main body and the handle are arranged coaxially to each other is particularly easy and precise to use.

The drive part preferably has a drive part housing. A fan, an energy storage device and a control device can be arranged in the drive part housing.

The drive part can have a drive part inlet opening at one end through which the fluid flow flows into the drive part when the suction device is in operation. In particular, it can also advantageously be provided that the drive part has the handle at the other end.

The suction device can advantageously be designed such that the suction part outlet opening is arranged directly adjacent to the drive part inlet opening when the suction part is coupled to the drive part. This enables the fluid flow, in particular the fluid flow of purified air, to flow from the suction part into the drive part through the suction part outlet opening and the drive part inlet opening during operation of the suction device.

As already mentioned, it can be advantageously provided that the drive part contains a fan, which has a motor and an impeller driven by the motor.

In the context of this patent application, an impeller is understood to mean in particular a ring of blades (vanes, rotor blades) that are held on a shaft by means of a suitable fastening or are made in one piece with the shaft. The impeller can have axial or radial flow. To implement a design with an impeller chamber separate from a motor chamber, it is particularly advantageous to use an impeller that generates a radially outward-directed fluid flow.

In an advantageous embodiment, the suction part does not contain any electrical components (or at most simple electrical components, such as simple sensors) and/or any components of the blower. In particular, it can advantageously be provided that all electrical components and/or all components of the blower are arranged in the drive part. Such an embodiment has the very special advantage that the component that is most exposed to dirt and liquid can be manufactured easily and inexpensively and, in the event of damage, can be replaced at low cost (compared to the cost of the entire suction device).

The drive motor can advantageously be designed as a brushless electric motor - and according to an independent inventive concept that can be implemented in combination with at least one of the other features mentioned in this application or independently of the other features mentioned in this application.

In a particularly advantageous embodiment, the drive part has an impeller chamber in which the impeller is arranged. In addition, in this embodiment, the drive part has a motor chamber in which the motor is arranged, the impeller chamber and the motor chamber being chambers separated from one another by a partition. This embodiment has the very special advantage that the motor can be arranged outside the fluid flow, which ensures that no liquid can reach the motor or other electrical components that are connected to the motor or to which the motor is connected. Only the drive shaft has to run through a partition arranged between the impeller chamber and the motor chamber, which is preferably sealed relative to the partition with a suitable shaft seal, in particular by means of a radial shaft seal or an axial shaft seal. In particular, an electronic control device and/or an electrical energy storage device, such as a battery, can also be arranged in the motor chamber. The motor chamber is preferably arranged outside the fluid flow, particularly for the reasons mentioned above.

However, arranging the impeller and the motor in different chambers is not without problems because the manufacturers of blowers strive to manufacture and deliver complete blower units in which the impeller is balanced relative to the motor. For this reason - according to an independent inventive concept that can be implemented in combination with at least one of the other features mentioned in this application or also separately from the other features mentioned in this application - at least part of the partition wall arranged between the impeller chamber and the motor chamber is formed by a motor shield of the drive motor. In particular, a fitting opening, in particular a truncated cone, can be present, in particular in a bearing shield forming part of the partition wall, into which the motor shield provided with a counter-fitting circumference is inserted with precision when assembling the suction device. This advantageously makes it possible to use both prefabricated and balanced blower units and to position them with precision and accuracy within the drive part housing.

In general, it can advantageously be provided that the impeller chamber is at least partially formed by a part of the drive part housing.

In particular, the impeller chamber can have at least one clean air outlet opening.

In a very special embodiment - and according to an independent inventive concept which can be implemented in combination with at least one of the other features mentioned in this application or also independently of the other features mentioned in this application - the suction power can be changed, in particular automatically.

In particular, two suction power levels can advantageously be provided, namely a dry cleaning suction level for sucking in only dry dirt and a wet cleaning suction level for sucking in liquid or for sucking in a (dirty) mixture of air and liquid. It has been shown that a lower suction level is sufficient for sucking in liquid. This has the advantage that energy is saved and any energy storage device, such as a rechargeable battery, is emptied more slowly. In addition, the wet cleaning suction level has the particular advantage that the risk of some of the sucked-in liquid getting into the air filter downstream of the liquid separator is reduced. Preferably, the electrical drive power of the drive motor in the dry cleaning suction stage is higher than in the wet cleaning suction stage. In particular, it can advantageously be provided that the electrical drive power of the drive motor in the dry cleaning suction stage is two to four times, in particular three times, higher than in the wet cleaning suction stage.

Alternatively or additionally, the electrical drive power of the drive motor in the dry cleaning suction stage can be in the range from 100 W to 200 W, in particular 150 W, and/or the electrical drive power of the drive motor in the wet cleaning suction stage can be in the range from 25 W to 75 W, in particular 50 W.

Alternatively or additionally, it can advantageously be provided that the suction negative pressure in the dry cleaning suction stage is higher than in the wet cleaning suction stage. In particular, the suction negative pressure in the dry cleaning suction stage can be higher by a factor of 1.5 to 2.5, in particular by a factor of 2, than in the wet cleaning suction stage.

In a special embodiment, the suction negative pressure in the dry cleaning suction stage is in the range from 12 kPa to 20 kPa, in particular 16 kPa. Alternatively or additionally, it can advantageously be provided that the suction negative pressure in the wet cleaning suction stage is in the range from 6 kPa to 10 kPa, in particular 8 kPa.

In an advantageous embodiment, a manually operated switching device is provided for switching between the suction power levels. In this embodiment, the user can select the suction power level that is most suitable for the material to be sucked in. In particular, the user can select the dry cleaning suction level if only dry material is to be sucked in. If liquid or a mixture of liquid and larger dirt particles is to be sucked in, the user can select the wet cleaning suction level.

The switching device can, for example, have a pivoting switching lever. Alternatively, the switching device can also have a push button, whereby the suction power level is selected by the number of times the push button is pressed in succession. For example, it can be provided that the suction device is switched on in the dry cleaning suction level by pressing the push button once and is switched back to the wet cleaning suction level by pressing the push button again. In this embodiment, it can also be provided that the suction device is switched off if the push button is subsequently pressed again.

In a particularly advantageous design, an automatic switching device which automatically switches between the suction power levels. In particular, it can be advantageously provided that the automatic switching device switches between the suction power levels depending on whether the fluid being sucked in contains a liquid. Such a design has the very special advantage that the user does not need to adjust the suction power level himself. However, it can be advantageously provided that the user can switch off the automatic function if necessary in order to select the suction power level himself.

To implement an automatic switching device, a liquid sensor can be present, for example, whereby the automatic switching device automatically switches from the dry cleaning suction stage to the wet cleaning suction stage as soon as the liquid sensor detects the suction of liquid and/or the presence of sucked-in liquid in the suction part. Alternatively or additionally, it can also be provided that the automatic switching device automatically switches from the wet cleaning suction stage to the dry cleaning suction stage if the liquid sensor does not detect any liquid.

In particular, the liquid sensor can be connected to an electronic control device that controls the motor of the fan depending on the sensor signal. In such an embodiment, the electronic control device is wholly or partially a component of the automatic switching device.

The liquid sensor can be arranged, for example, in the area of the dirt intake opening or in the collection area. Such a design has the very special advantage that it can be determined immediately at the beginning of each suction process whether the sucked-in material contains liquid. Alternatively or additionally, the liquid sensor can be arranged in the receiving space for, in particular, coarser dirt and sucked-in liquid. In these designs, it can be provided in particular that the suction part and the drive part each have electrical contact elements which are designed and positioned in such a way that when the suction part is coupled to the drive part, an electrical contact is automatically established from a control device arranged in the drive part to the liquid sensor arranged in the suction part.

It is also possible for the liquid sensor to be arranged in the drive part, for example in an impeller chamber in which an impeller that generates the fluid flow rotates. Such a design has the very special advantage that supply lines, in particular electrical ones, that run inside the suction part to the liquid sensor can be dispensed with. In this way, it is particularly avoided that an electrical contact between the liquid sensor and the drive part has to be established when the suction part is coupled to the drive part. becomes.

It is also possible for the suction device to have several liquid sensors that are located at different locations within the suction device. This type of design switches particularly reliably to the required suction power level.

There are no fundamental restrictions with regard to the design of the liquid sensor. The liquid sensor can, for example, be designed as an optical liquid sensor. This can, for example, have a light source, in particular an LED, and a light detector, in particular a photodiode, which are arranged relative to one another in such a way that a change in the refraction and/or reflection of the light from the light source caused by the presence of liquid causes a change in the light output arriving at the light sensor. The liquid sensor can alternatively be based, for example, on measuring the electrical conductivity of the medium located between two electrodes. The liquid sensor can alternatively be based, for example, on measuring an electrical capacitance between two, for example plate-shaped, electrodes, which naturally changes when a liquid penetrates into the space between the electrodes.

In particular, it can be advantageously provided that the suction device can only be switched from the wet cleaning suction stage back to the dry cleaning suction stage if the receiving space has previously been emptied. In order to be able to determine whether emptying has taken place, the control device can evaluate the sensor signal of a moisture sensor arranged in the receiving space. Alternatively or additionally, a sensor can be present at the emptying opening that detects whether the emptying opening closure has been opened.

Alternatively or additionally, it can also be provided, for example, that the automatic switching device automatically switches between the suction power levels depending on the orientation of the suction device in the room. For this purpose, the automatic switching device can contain a position sensor, in particular an acceleration sensor, by means of which the current orientation of the suction device can be determined.

For example, it can be provided that the automatic switching device switches from the dry cleaning suction stage to the wet cleaning suction stage when it detects that the suction device is held by the user in such a way that the dirt suction opening is arranged above the drive part. Such an orientation of the suction device is in fact an indication that the user is cleaning windows by sucking moisture off a window pane. The suction device according to the invention can - according to an independent inventive concept that can be implemented in combination with at least one of the other features mentioned in this application or independently of the other features mentioned in this application - have at least one additional suction part that can be coupled to the drive part in exchange for the suction part. In particular, the additional suction part can be different from the suction part. For example, the additional suction part can be a suction part that is specially designed for cleaning window panes. For this purpose, the additional suction part can have an elastic squeegee lip.

In a particularly advantageous embodiment, the automatic switching device automatically selects the suction power level depending on which of the suction parts is currently coupled to the drive part. For example, it can advantageously be provided that the automatic switching device selects the wet cleaning suction level when a window cleaning suction part designed for window cleaning is coupled to the drive part. Furthermore, it can advantageously be provided - alternatively or additionally - that the automatic switching device selects the dry cleaning suction level when a suction part that is also suitable for pure dry cleaning (in particular in addition to wet cleaning) is coupled to the drive part.

So that the control device can automatically detect which suction part is currently coupled to the drive part, at least one of the suction parts can have a switching element characteristic of the suction part, for example a switching projection, which interacts with a detector element of the drive part when the suction part is coupled to the drive part. In this way, the user does not have to separately inform the control device which of the suction parts he has currently coupled to the drive part.

In a particularly advantageous embodiment, the suction device is designed and suitable to be held and operated exclusively with one hand, in particular on the handle, during a suction process.

As already mentioned, the suction device can contain an electrical energy storage device, in particular a battery. In particular, the suction device can be designed to be inserted into a charging station, whereby the electrical contacts required to charge the energy storage device are automatically closed.

However, it is alternatively or additionally possible that the suction device is designed to be connected to a power supply for operation. A suction device that has at least one of the following aspects is particularly advantageous:

1. Suction device which has a dirt intake opening through which air and dirt can be sucked into the suction device from outside, and which has a clean air outlet opening through which filtered air flows out, wherein the dirt intake opening is formed on a suction part which is detachably coupled to a drive part which has a fan and the clean air outlet opening, characterized in that the suction part has a liquid separator or is designed as a liquid separator.

2. Suction device according to aspect 1, characterized in that the suction part has a suction part housing.

3. Suction device according to aspect 1 or 2, characterized in that the suction part has a receiving space for, in particular, coarser, dirt and sucked-in liquid.

4. Suction device according to aspects 2 and 3, characterized in that the receiving space is at least partially formed by at least a part of the suction part housing.

5. Suction device according to one of aspects 2 to 4, characterized in that the receiving space is formed by a container arranged in the suction part housing.

6. Suction device according to one of aspects 3 to 5, characterized in that the receiving space has an automatically operating closing device which opens or closes the receiving space depending on the current orientation of the suction device and/or depending on the operating state of the suction device.

7. Suction device according to aspect 6, characterized in that the closure device opens or closes a receiving space access depending on the direction of the weight force acting on a closure device weight body.

8. Suction device according to aspect 6, characterized in that the closure device has a spring-loaded and/or elastic closure flap which opens automatically by the fluid flow during operation of the suction device and closes automatically when the suction device is switched off.

9. Suction device according to one of aspects 1 to 8, characterized in that the suction part has a suction part outlet opening through which air can flow into the drive part.

10. Suction device according to one of aspects 1 to 9, characterized in that the suction part has an emptying opening through which dirt and sucked-in liquid can be removed from the suction part.

1 1. Suction device according to aspect 10, characterized in that the emptying opening is arranged outside the fluid flow.

12. Suction device according to aspect 10 or 11, characterized in that the emptying opening is arranged adjacent to the dirt suction opening and/or that the emptying opening is arranged at an end of the suction part at which the dirt suction opening is also arranged.

13. Suction device according to one of aspects 10 to 12, characterized in that an emptying opening closure is provided by means of which the emptying opening can be closed in a liquid-tight manner.

14. Suction device according to aspect 13, characterized in that the

The emptying opening closure is designed as a flap.

15. Suction device according to aspect 13, characterized in that the

The emptying opening closure is designed as a screw cap or as a snap-in cap.

16. Suction device according to one of aspects 13 to 15, characterized in that the emptying opening closure is designed to be operated without tools.

17. Suction device according to one of aspects 1 to 16, characterized in that the suction part is elongated, in particular cylindrical.

18. Suction device according to aspect 17, characterized in that the suction part has the dirt suction opening at one end and the suction part outlet opening at the other end.

19. Suction device according to one of aspects 1 to 18, characterized in that the suction part is coupled to the drive part in a detachable manner without tools and without destruction.

20. Suction device according to one of aspects 1 to 1 , characterized in that the suction part is releasably coupled to the drive part by means of a coupling device.

21. Suction device according to aspect 20, characterized in that the coupling device has at least one coupling element arranged on the suction part, in particular on the suction part housing of the suction part, and at least one counter-coupling element arranged on the drive part, in particular on a drive part housing of the drive part.

22. Suction device according to aspect 21, characterized in that the coupling element and the counter-coupling element are mechanically and/or magnetically operatively connected when the suction part is coupled to the drive part.

23. Suction device according to aspect 21 or 22, characterized in that the coupling element is arranged in the region of the suction part outlet opening.

24. Suction device according to one of aspects 21 to 23, characterized in that the coupling element has a locking recess or a locking opening and that the counter-coupling element has a locking hook which engages in the locking recess or the locking opening when the suction part is coupled to the drive part.

25. Suction device according to aspect 24, characterized in that the counter-coupling element is designed to be remotely controlled.

26. Suction device according to aspect 25, characterized in that, in particular in the area of a Handle of the drive part, there is a release button which is mechanically coupled to the counter coupling element.

27. Suction device according to one of aspects 1 to 26, characterized in that a filter housing is arranged in the suction part, which has a filter housing inlet opening and a filter housing outlet opening and which contains a filter for removing dirt from the air stream.

28. Suction device according to aspect 27, characterized in that the filter housing inlet opening is arranged adjacent to the suction part housing such that a gap, in particular an annular gap, is formed between the edge of the filter housing inlet opening and the suction part housing.

29. Suction device according to aspect 28, characterized in that the gap has a gap width in the range of 1 mm to 10 mm, in particular in the range of 1 mm to 5 mm.

30. Suction device according to one of aspects 27 to 29, characterized in that a sieve, in particular a stainless steel sieve, is inserted into the filter housing inlet opening, in particular so as to be removable again in a non-destructive manner and/or without tools.

31. Suction device according to one of aspects 27 to 30, characterized in that the filter housing or at least the part of the filter housing which has the filter housing inlet opening is arranged to be movable relative to the suction part housing.

32. Suction device according to aspect 31, characterized in that the suction device has an automatically operating alignment device which always automatically aligns the filter housing or at least the part of the filter housing which has the filter housing inlet opening such that the filter housing inlet opening is directed upwards.

33. Suction device according to aspect 32, characterized in that the alignment device aligns the filter housing or at least the part of the filter housing which has the filter housing inlet opening depending on the direction of the weight force acting on an alignment device weight body.

34. Suction device according to one of aspects 27 to 33, characterized in that the filter is designed as a suspended matter filter, in particular as a HEPA filter.

35. Suction device according to one of aspects 27 to 34, characterized in that the filter is inserted in a form-fitting manner into the filter housing.

36. Suction device according to one of aspects 27 to 35, characterized in that the filter can be removed again into the filter housing without destruction and/or without tools.

37. Suction device according to one of aspects 27 to 36, characterized in that the filter housing has a filter housing cover which can be removed, in particular non-destructively and/or without tools, and which has the filter housing outlet opening. 38. Suction device according to one of aspects 27 to 37, characterized in that the filter housing is inserted into the suction part housing in a form-fitting manner, in particular in a way that is removable again without tools and/or without destruction.

39. Suction device according to one of aspects 27 to 38, characterized in that the filter housing can be inserted into the suction part housing and removed again through the suction part outlet opening.

40. Suction device according to one of aspects 1 to 39, characterized in that a suction tube, in particular a straight one, is arranged in the suction part, through which sucked-in protection flows together with sucked-in air and/or liquid.

41. Suction device according to aspect 40, characterized in that the suction pipe has a suction pipe inlet opening and a suction pipe outlet opening.

42. Suction device according to aspect 41, characterized in that the dirt suction opening is formed by the suction pipe inlet opening or that the suction pipe inlet opening is fluidically connected to the dirt suction opening.

43. Suction device according to one of aspects 1 to 42, characterized in that the liquid separator has at least one labyrinth.

44. Suction device according to aspect 43, characterized in that at least part of the labyrinth is formed by the arrangement of the suction pipe relative to the filter housing.

45. Suction device according to aspect 43 or 44, characterized in that at least part of the labyrinth is formed by the arrangement of the suction pipe relative to the suction part housing.

46. Suction device according to one of aspects 43 to 45, characterized in that at least part of the labyrinth is formed by the arrangement of the filter housing relative to the suction part housing.

47. Suction device according to one of aspects 27 to 39 in combination with one of aspects 40 to 46, characterized in that a. the distance of the filter housing inlet opening to the dirt suction opening is smaller than the distance of the suction pipe outlet opening to the dirt suction opening, and/or that b. the distance of the filter housing inlet opening to the suction pipe inlet opening is smaller than the distance of the suction pipe outlet opening to the suction pipe inlet opening, and/or that c. the distance of the filter housing inlet opening to the suction pipe inlet opening is smaller than the length of the suction pipe, and/or that d. the distance of the suction pipe outlet opening to the drive part is smaller than the distance of the filter housing inlet opening to the drive part, and/or that e. the distance of the suction pipe outlet opening to the filter housing outlet opening is smaller than the distance of the filter housing inlet opening to the filter housing outlet opening, and/or that f. the distance of the suction pipe outlet opening to the filter housing outlet opening is smaller than the length of the filter housing.

48. Suction device according to one of aspects 41 to 47, characterized in that the suction pipe ends freely in the suction part housing and/or in the container arranged within the suction part housing and/or that the suction pipe outlet opening ends freely in the suction part housing and/or in the container arranged within the suction part housing.

49. Suction device according to one of aspects 41 to 48, characterized in that the suction pipe outlet opening is arranged in the receiving space for dirt and sucked-in liquid or immediately adjacent to the receiving space for dirt and sucked-in liquid.

50. Suction device according to one of aspects 1 to 49, characterized in that the drive part is elongated, in particular at least partially cylindrical.

51. Suction device according to one of aspects 1 to 50, characterized in that the drive part has a main body and a handle.

52. Suction device according to aspect 51, characterized in that a. the main body is elongated and/or substantially cylindrical, and/or that b. the handle is elongated and/or substantially cylindrical.

53. Suction device according to aspect 51 or 52, characterized in that the main body and the handle are arranged coaxially to each other.

54. Suction device according to one of aspects 1 to 53, characterized in that the drive part has a drive part housing.

55. Suction device according to one of aspects 50 to 54, characterized in that the drive part has a drive part inlet opening at one end.

56. Suction device according to aspect 55, characterized in that the drive part has the handle at the other end.

57. Suction device according to one of aspects 8 to 54 in combination with aspect 55 or 56, characterized in that the suction part outlet opening is arranged immediately adjacent to the drive part inlet opening when the suction part is coupled to the drive part.

58. Suction device according to one of aspects 1 to 57, characterized in that the drive part includes a fan which has a motor and an impeller driven by the motor.

59. Suction device according to aspect 58, characterized in that the drive motor is designed as a brushless electric motor.

60. Suction device according to aspect 58 or 59, characterized in that the drive part has an impeller chamber in which the impeller is arranged and a motor chamber in which the motor is arranged, wherein the impeller chamber and the motor chamber chambers separated from each other by a partition.

61. Suction device according to aspect 60, characterized in that at least part of the partition wall is formed by a motor shield of the drive motor.

62. Suction device according to aspect 61, characterized in that a fitting opening, in particular a frustoconical opening, is provided, in particular in a bearing plate forming part of the partition wall, into which the motor plate provided with a counter-fitting circumference is inserted with a precise fit.

63. Suction device according to one of aspects 60 to 62, characterized in that the impeller chamber is at least partially formed by a part of the drive part housing.

64. Suction device according to aspect 63, characterized in that the impeller chamber has the clean air outlet opening.

65. Suction device according to one of aspects 60 to 64, characterized in that the motor chamber is arranged outside the fluid flow.

66. Suction device according to one of aspects 1 to 65, characterized in that the suction power is variable.

67. Suction device according to aspect 66, characterized in that two suction power levels are provided, namely a dry cleaning suction level for sucking in exclusively dry dirt and a wet cleaning suction level for sucking in liquid.

68. Suction device according to aspect 67, characterized in that a. the electrical drive power of the drive motor in the dry cleaning suction stage is higher than in the wet cleaning suction stage, or that b. the electrical drive power of the drive motor in the dry cleaning suction stage is two to four times, in particular three times, higher than in the wet cleaning suction stage.

69. Suction device according to aspect 67 or 68, characterized in that a. the electrical drive power of the drive motor in the dry cleaning suction stage is in the range from 100 W to 200 W, in particular 150 W, and/or that b. the electrical drive power of the drive motor in the wet cleaning suction stage is in the range from 25 W to 75 W, in particular 50 W.

70. Suction device according to one of aspects 67 to 69, characterized in that a. the suction negative pressure in the dry cleaning suction stage is higher than in the wet cleaning suction stage, or that b. the suction negative pressure in the dry cleaning suction stage is higher by a factor of 1.5 to 2.5, in particular by a factor of 2, than in the wet cleaning suction stage.

71. Suction device according to one of aspects 67 to 70, characterized in that a. the suction negative pressure in the dry cleaning suction stage is in the range from 12 kPa to 20 kPa, in particular 16 kPa, and/or that b. the suction negative pressure in the wet cleaning suction stage is in the range from 6 kPa to 10 kPa is, in particular 8 kPa.

72. Suction device according to one of aspects 67 to 71, characterized in that a manually operable switch is provided for switching between the suction power levels.

73. Suction device according to one of aspects 67 to 72, characterized in that an automatic switching device is provided which automatically switches between the suction power levels.

74. Suction device according to aspect 73, characterized in that the automatic switching device switches between the suction power levels depending on whether the sucked-in fluid contains a liquid.

75. Suction device according to aspect 73 or 74, characterized in that a liquid sensor is present and that the automatic switching device automatically switches from the dry cleaning suction stage to the wet cleaning suction stage as soon as the liquid sensor detects the suction of liquid and/or the presence of sucked-in liquid in the suction part.

76. Suction device according to aspect 75, characterized in that the liquid sensor is arranged in the region of the dirt suction opening or in the collection area.

77. Suction device according to one of aspects 73 to 76, characterized in that the automatic switching device automatically switches between the suction power levels depending on the orientation of the suction device in the room.

78. Suction device according to aspect 77, characterized in that the automatic switching device includes a position sensor, in particular an acceleration sensor.

79. Vacuum cleaner according to aspect 77 or 78, characterized in that the automatic switching device switches from the dry cleaning suction stage to the wet cleaning suction stage when it detects that the vacuum cleaner is held by the user in such a way that the dirt suction opening is arranged above the drive part.

80. Suction device according to one of aspects 1 to 79, characterized in that at least one further suction part is present which can be coupled to the drive part in exchange for the suction part.

81. Suction device according to one of aspects 64 to 79 in combination with aspect 80, characterized in that the automatic switching device automatically selects the suction power level depending on which of the suction parts is currently coupled to the drive part.

82. Suction device according to aspect 81, characterized in that at least one of the suction parts has a switching element characteristic of the suction part, for example a switching projection, which cooperates with a detector element of the drive part when the suction part is coupled to the drive part. 83. Suction device according to one of aspects 80 to 82, characterized in that the further suction part is a window cleaning suction part which has an elastic squeegee lip.

84. Suction device according to one of aspects 1 to 83, characterized in that the suction device is designed and suitable to be held and operated exclusively with one hand, in particular on the handle, during a suction process.

85. Suction device according to one of aspects 1 to 84, characterized in that the suction device contains an electrical energy storage device, in particular a battery.

The subject matter of the invention is shown schematically and by way of example in the drawing and is described below with reference to the figures, whereby identical or identically acting elements are usually provided with the same reference numerals even in different embodiments. In the drawing:

Fig. 1 shows a first embodiment of a suction device according to the invention in a schematic cross-sectional view,

Fig. 2 the suction device according to the first embodiment in disassembled state,

Fig. 3 is a detailed view of the suction device according to the first embodiment,

Fig. 4 is a representation of the course of the fulid flow in the suction device according to the first embodiment,

Fig. 5 shows a second embodiment of a suction device according to the invention in a schematic cross-sectional view,

Fig. 6 a third embodiment of a suction device according to the invention in a schematic cross-sectional view,

Fig. 7 shows a fourth embodiment of a suction device according to the invention in a schematic cross-sectional view,

Fig. 8 shows a fifth embodiment of a suction device according to the invention in a schematic cross-sectional view,

Fig. 9 shows a sixth embodiment of a suction device according to the invention in a schematic cross-sectional view, Fig. 10 the sixth embodiment of a suction device according to the invention in a different rotational position,

Fig. 1 1 a seventh embodiment of a suction device according to the invention in a schematic cross-sectional view

Fig. 12 the seventh embodiment of a suction device according to the invention in a different orientation,

Fig. 13 an eighth embodiment of a suction device according to the invention in disassembled state,

Fig. 14 the suction device according to the eighth embodiment in ready-to-use condition,

Fig. 15 the suction device according to the eighth embodiment with the emptying opening closure open,

Fig. 16 the suction device according to the eighth embodiment with an attached window cleaning nozzle, which has a squeegee lip

Fig. 17 the suction part of the suction device according to the eighth embodiment in a

Cross-sectional view without filter inserted,

Fig. 18 the suction part of the suction device according to the eighth embodiment in a

Cross-sectional view with filter inserted.

Fig. 1 shows a first embodiment of a suction device according to the invention in a schematic cross-sectional view.

The vacuum cleaner has a dirt intake opening 1 through which dirt can be sucked into the vacuum cleaner from outside. The vacuum cleaner also has several clean air outlet openings 2 through which filtered air flows out.

The dirt intake opening 1 is formed on a suction part 3, which is detachably coupled to a drive part 4, which has a fan 5 and the clean air outlet openings 2. The suction part 3 has a liquid separator 6, which is implemented, among other things, by a special arrangement of a suction pipe 7 relative to a filter housing 8. The special arrangement of the suction pipe 7 relative to the filter housing 8 is part of a labyrinth of the liquid separator 6. In addition, the liquid separator 6 is also formed by a special design and arrangement of the filter housing 8.

The suction part 3 has a suction part housing 9.

The suction pipe 7 is arranged in the suction part housing 9, through which the suctioned-in dirt flows together with the suctioned-in air and/or liquid. The suction pipe 7 could also protrude from the suction part housing 9. The suction pipe 7 has a suction pipe inlet opening 10 and a suction pipe outlet opening 11. In this embodiment, the dirt suction opening 1 is also the suction pipe inlet opening 10 at the same time, although this does not necessarily have to be the case regardless of the other features.

The suction pipe 7 ends freely in the suction part housing.

In this design, all dirt sucked in through the dirt intake opening 1, all air sucked in through the dirt intake opening and all liquid sucked in through the dirt intake opening first passes through the suction pipe 7.

A spring-loaded and/or elastic closure flap 12 is arranged on the suction pipe 7 in the region of the suction pipe outlet opening 11, which flap opens automatically due to the fluid flow during operation of the suction device and closes automatically when the suction device is switched off.

The filter housing 8 is inserted into the suction part housing 9 and has a filter housing inlet opening 13 and a filter housing outlet opening 14 and which contains a filter 15 for removing dirt from the air flow. An end section 65 of the filter housing 8 ends freely in the suction part housing 9.

In order to prevent the penetration of coarser dirt particles into the filter housing 8, a sieve 16, in particular a stainless steel sieve, is inserted into the filter housing inlet opening 13, in particular in a manner that can be removed again in a non-destructive manner and/or without tools.

The filter housing inlet opening 13 is arranged adjacent to the suction part housing 9 in such a way that only a narrow gap 17 is formed between the edge of the filter housing inlet opening 13 and the suction part housing. The labyrinth of the liquid separator 6 is also realized, among other things, in that the axial distance 18 of the filter housing inlet opening 13 to the dirt intake opening 1 is smaller than the distance 19 of the suction pipe outlet opening 11 to the dirt intake opening 1. In addition, the distance 20 of the suction pipe outlet opening 11 to the drive part 4 is smaller than the distance 21 of the filter housing inlet opening 21 to the drive part 4.

Opposite the suction pipe outlet opening 11 there is an impact surface 22 against which the sucked-in fluid and the sucked-in dirt collide. The impact surface 22 is part of an outer surface of the filter housing 8. The sucked-in liquid adheres to the impact surface and then drips off and remains in a receiving space 23. Larger sucked-in dirt particles also lose their kinetic energy by impacting the impact surface 22 and also remain in the receiving space 23.

The receiving space 23 for dirt (in particular for larger dirt particles such as bread crumbs, stones and the like) and sucked-in liquid is formed by a part of the suction part housing 9.

The suction part has a drain opening 24 through which dirt and sucked-in liquid can be removed from the receiving space 23.

There is an emptying opening closure 25, by means of which the emptying opening 24 can be closed in a liquid-tight manner. The emptying opening closure 24 is designed as a flap. The flap is mounted by means of a hinge 26 in such a way that it is pulled into an open position by the force of weight when the suction device (as in suction mode) is held at an angle and with the dirt suction opening 1 facing downwards. With such a design, the user only has to unlock the flap for an emptying process using a locking device 27, so that it then automatically falls into the open position.

The suction part 3 has a suction part outlet opening 28 through which air can flow into the drive part 4. The suction part outlet opening 28 is arranged opposite a drive part inlet opening 29 when the suction part 3 is coupled to the drive part 4.

The suction part 3 is releasably coupled to the drive part 4 or can be coupled to the drive part 4 by means of a coupling device. The coupling device has a coupling element designed as a locking opening 30 on the suction part 3 and a counter-coupling element arranged on the drive part 4 and designed as a locking projection 31. The locking projection 31 engages in the locking opening 30 when the suction part 3 is coupled to the drive part 4. The coupling element is arranged as a component of the suction part 3 in the region of the suction part outlet opening 28, while the counter-coupling element is arranged as a component of the drive part 4 in the region of a drive part inlet opening 29.

The counter-coupling element on the drive part 4 is designed to be remote-controlled. For this purpose, a release button 33 is provided in the area of a handle 32 of the drive part 4, which is mechanically coupled to the counter-coupling element. The mechanical coupling is not shown in Figure 1 for the sake of better clarity. With such a design, the user can release the locking of the coupling device by pressing the release button 33 in order to be able to release the suction part 3 from the drive part 4.

As already mentioned, the drive part 4 includes a fan 5 which has a motor 34 and an impeller 35 driven by the motor 34.

The drive part 4 has an impeller chamber 36 in which the impeller 35 is arranged. In addition, the drive part 4 has a motor chamber 37 in which the motor is arranged, the impeller chamber 36 and the motor chamber 37 being chambers separated from one another by a partition wall 38.

A drive shaft 39 extends through the partition wall 38 arranged between the impeller chamber 36 and the motor chamber 37 and is sealed relative to the partition wall 38 by a shaft seal 40.

An electronic control device 41 and an electrical energy storage device 42 are also arranged in the motor chamber 37.

In the area of the handle 32 there is a push button switch 43, by means of which the user can switch the suction device on, off and select a suction power level. In particular, the user can select a dry cleaning suction level if he only wants to suck up dry dirt, or he can select a wet cleaning suction level if he wants to suck up liquid or a mixture of air and liquid, especially a dirty one. Alternatively or additionally, the suction device can have an automatic switching device, in particular with a liquid sensor (not shown).

Fig. 2 shows the suction device according to the first embodiment in a disassembled state, in which the filter housing 8 is removed from the suction part housing 9. In addition, the filter 15 is also removed from the filter housing 8. The filter housing 8 has a, in particular non-destructive and/or tool-free, removable filter housing cover 44, which has the filter housing outlet opening 14. For assembly, the user can first insert the filter 15, in particular in the form of a filter cartridge, into the filter housing 8 and then close the filter housing 8 with the filter housing cover 44, wherein the filter housing cover 44 is preferably designed such that it secures the filter inserted into the filter housing 8 radially and/or axially in its position. The filter housing 8 can then be inserted through the suction part outlet opening 28 into the suction part housing 9, in particular in a form-fitting manner.

Subsequently, the suction part 3 is coupled to the drive part 4, whereby the operational state of the suction device is achieved.

Fig. 3 shows a detailed view of the suction device according to the first embodiment.

A part of the partition wall arranged between the impeller chamber 36 and the motor chamber 37 is formed by a motor shield 45 of the drive motor 34. In the drive part housing 46 there is a fitting opening 47, in particular a truncated cone, in a bearing shield 48 forming part of the partition wall 38, into which the motor shield 45 provided with a counter-fitting circumference 49 is inserted with precision when assembling the suction device. This advantageously makes it possible to use both prefabricated and balanced blower units and to position them with precision and accuracy within the drive part housing 46.

Fig. 4 shows a representation of the course of the fulid flow in the suction device according to the first embodiment.

As already mentioned, all dirt sucked in through the dirt intake opening 1, all air sucked in through the dirt intake opening and all liquid sucked in through the dirt intake opening first passes through the suction pipe 7.

As already mentioned, opposite the suction pipe outlet opening 11 there is a baffle surface 22 against which the sucked-in fluid and the sucked-in dirt collide. The sucked-in fluid initially adheres to the baffle surface 22 and then drips off and remains in the receiving space 23. Larger sucked-in dirt particles lose their kinetic energy by impacting the baffle surface 22 and also remain in the receiving space 23. Sucked-in air and smaller dirt particles, however, remain in the fluid flow and then pass through the filter 15 arranged in the filter housing 8, which removes the remaining dirt from the air. The air is then passed through the Clean air outlet openings 2 are expelled from the suction device.

The drain opening 24 is arranged outside the fluid flow. Such a design has the very special advantage that the drain opening closure 25, by means of which the drain opening 24 can be closed, and in particular the seals (not shown) of the drain opening closure 25 are not stressed by the fluid flow. In particular, this advantageously prevents liquid and/or air from being accidentally pushed out past the seal of the drain opening closure 25 due to the effect of the fluid flow.

Fig. 5 shows a second embodiment of a suction device according to the invention in a schematic cross-sectional view, which differs from the first embodiment in that a liquid sensor 50 is present.

The liquid sensor 50 is part of an automatic switching device that automatically switches from a dry cleaning suction stage to a wet cleaning suction stage as soon as the liquid sensor 50 detects the suction of liquid and/or the presence of sucked-in liquid. Alternatively or additionally, it can also be provided that the automatic switching device automatically switches from the wet cleaning suction stage to the dry cleaning suction stage if the liquid sensor 50 does not detect any liquid.

The liquid sensor 50 is connected to the electronic control device 41, which controls the motor 34 in response to the sensor signal of the liquid sensor 50.

In this embodiment, the suction part 3 and the drive part 4 each have electrical contact elements 51 which are designed and positioned such that when the suction part 3 is coupled to the drive part 4, an electrical contact is automatically established via electrical cables 52 from the control device 41 arranged in the drive part to the liquid sensor 50 arranged in the suction part 3.

Fig. 6 shows a third embodiment of a suction device according to the invention in a schematic cross-sectional view, which differs from the second embodiment in that the liquid sensor 50 is arranged in the receiving space 23.

Fig. 7 shows a fourth embodiment of a suction device according to the invention in a schematic cross-sectional view, which differs from the second and third embodiments in that the liquid sensor 50 is arranged in the drive part 4, namely in the impeller chamber 36. This embodiment has the very special The advantage is that electrical signal lines running from the drive part 4 to the suction part 3 can be dispensed with.

Fig. 8 shows a fifth embodiment of a suction device according to the invention in a schematic cross-sectional view.

In this embodiment, the suction device has a further suction part 53, which can be coupled to the drive part 4 in exchange for the suction part 3. In particular, the further suction part 53 can be constructed and designed differently than the suction part 3. The further suction part 53 can be a window cleaning suction part, which is specially designed for cleaning window panes and which has an elastic squeegee lip 54.

In this embodiment, it can advantageously be provided that an automatic switching device automatically selects the suction power level depending on which of the suction parts 3, 53 is currently coupled to the drive part 4. For example, it can advantageously be provided that the automatic switching device selects a wet cleaning suction level when the further suction part 53 is coupled to the drive part 4.

So that the control device 41 can automatically detect whether the suction part or the further suction part is currently coupled to the drive part 4, the further suction part 53 has a switching element 63 characteristic of the further suction part 53, namely a switching projection, which interacts with a detector element 64 of the drive part 4 when the further suction part 53 is coupled to the drive part 4.

In this embodiment, too, the suction pipe 7 ends freely in the suction part housing 9. In this embodiment, too, an end section 65 of the filter housing 8, which has the filter housing inlet opening 13, ends freely in the suction part housing 9.

Figures 9 and 10 show a sixth embodiment of a suction device according to the invention in a schematic cross-sectional view.

In this embodiment, the part of the filter housing 8 which has the filter housing inlet opening 13 is arranged to be rotatable relative to the suction part housing 9 by means of a rotary joint 61 about a rotary axis 56. The suction device has an automatically operating alignment device which always automatically aligns the part of the filter housing 8 which has the filter housing inlet opening 13 in such a way that the filter housing inlet opening 13 is directed upwards. For this purpose, the alignment device is designed in such a way that it aligns the part of the filter housing 8, which has the filter housing inlet opening 13, depending on the direction of the weight force acting on an alignment device weight body 55.

In this embodiment, too, the suction pipe 7 ends freely in the suction part housing 9. In this embodiment, too, an end section 65 of the filter housing 8, which has the filter housing inlet opening 13, ends freely in the suction part housing 9.

In the area of the handle 32 there is a push button switch 43, by means of which the user can switch the suction device on, off and select a suction power level. In particular, the user can select a dry cleaning suction level if he only wants to suck up dry dirt, or he can select a wet cleaning suction level if he wants to suck up liquid or a mixture of air and liquid, especially a dirty one. Alternatively or additionally, the suction device can have an automatic switching device, in particular with a liquid sensor (not shown).

Figure 10 shows the sixth embodiment of a suction device according to the invention in a different rotational position. It can be seen that the filter housing inlet opening 13 always remains oriented upwards.

This design makes advantageous use of the fact that the liquid sucked in always flows downwards in the suction part due to the force of gravity. Since the filter housing inlet opening 13 is always directed upwards regardless of the respective orientation of the suction device, the penetration of liquid into the filter housing 8 is effectively prevented in this way.

Figures 11 and 12 show a seventh embodiment of a suction device according to the invention in a schematic cross-sectional view.

In this embodiment, the part of the filter housing 8 which has the filter housing inlet opening 13 is arranged so as to be pivotable about a pivot point 57 relative to the suction part housing 9 by means of a cardan joint (not shown in detail for the sake of clarity), the part of the filter housing 8 which has the filter housing inlet opening 13 being connected to the rest of the filter housing 8 via a bellows 58. The suction device has an automatically operating alignment device which always automatically aligns the part of the filter housing 8 which has the filter housing inlet opening 13 such that the filter housing inlet opening 13 is directed upwards. For this purpose, the alignment device is designed such that it aligns the part of the filter housing 8 which has the filter housing inlet opening 13 depending on the direction of the weight force acting on an alignment device weight body 55. In this embodiment, too, the suction pipe 7 ends freely in the suction part housing 9. In this embodiment, too, an end section 65 of the filter housing 8, which has the filter housing inlet opening 13, ends freely in the suction part housing 9.

In the area of the handle 32 there is a push button switch 43, by means of which the user can switch the suction device on, off and select a suction power level. In particular, the user can select a dry cleaning suction level if he only wants to suck up dry dirt, or he can select a wet cleaning suction level if he wants to suck up liquid or a mixture of air and liquid, especially a dirty one. Alternatively or additionally, the suction device can have an automatic switching device, in particular with a liquid sensor (not shown).

Figure 12 shows the seventh embodiment of a suction device according to the invention with a different orientation. It can be seen that the filter housing inlet opening 13 always remains oriented upwards.

Fig. 13 shows an eighth embodiment of a suction device according to the invention in a disassembled state.

The suction device according to the eighth embodiment has a dirt intake opening 1 through which dirt can be sucked into the suction device from outside. The suction device also has several clean air outlet openings 2 through which filtered air flows out.

The dirt intake opening 1 is formed on a suction part 3, which is detachably coupled to a drive part 4, which has a fan 5 and the clean air outlet openings 2.

The suction part 3 has a liquid separator 6, not shown in Figure 13.

The suction part 3 has a suction part housing 9, while the drive part 4 has a drive part housing 46.

Fig. 13 shows the suction device according to the eighth embodiment in a disassembled state, in which the filter housing 8 is removed from the suction part housing 9. In addition, the filter 15 is removed from the filter housing 8. The filter housing 8 has a filter housing cover 44 which can be removed, in particular non-destructively and/or without tools, and which has the filter housing outlet opening 14. To assemble, the user can first insert the filter 15, in particular in the form of a filter cartridge, into the filter housing 8 and then close the filter housing 8 with the filter housing cover 44, wherein the filter housing cover 44 is preferably designed such that it secures the filter inserted into the filter housing 8 in its position radially and/or axially. The filter housing 8 can then be inserted through the suction part outlet opening 28 into the suction part housing 9, in particular in a form-fitting manner.

In the area of the handle 32 there is a push button switch 43, by means of which the user can switch the suction device on, off and select a suction power level. In particular, the user can select a dry cleaning suction level if he only wants to suck up dry dirt, or he can select a wet cleaning suction level if he wants to suck up liquid or a mixture of air and liquid, especially a dirty one. Alternatively or additionally, the suction device can have an automatic switching device, in particular with a liquid sensor (not shown).

Fig. 14 shows the suction device according to the eighth embodiment in a ready-to-use state.

In this embodiment, too, the suction pipe 7 ends freely in the suction part housing 9. In this embodiment, too, an end section 65 of the filter housing 8, which has the filter housing inlet opening 13, ends freely in the suction part housing 9.

The suction part housing 8 is transparent, which makes it possible to check the filling level of the receiving space from the outside without removing the suction part 3 from the drive part 4 or opening the receiving space. A marking 59 for the maximum permissible filling level is arranged on the suction part housing.

Fig. 15 shows the suction device according to the eighth embodiment from below.

The suction part has a drain opening 24 through which dirt and sucked-in liquid can be removed from the receiving space 23.

There is an emptying opening closure 25, by means of which the emptying opening 24 can be closed in a liquid-tight manner. The emptying opening closure 24 is designed as a flap. The flap is mounted by means of a hinge 26 in such a way that it is pulled into an open position by the force of weight when the suction device (as in suction mode) is held at an angle and with the dirt suction opening 1 facing downwards. With such a design, the user only has to unlock the flap for an emptying process using a locking device 27, so that it then automatically falls into the open position. The suction device has an electrical energy storage device (not shown), in particular a battery, and is designed to be inserted into a charging station (not shown) for a charging process, wherein the electrical charging contacts 60 required for charging the energy storage device are automatically connected.

Fig. 16 shows the suction device according to the eighth embodiment with an attached window cleaning nozzle 62, which has a squeegee lip 54. The window cleaning nozzle 62 is attached to the dirt suction opening 1.

Fig. 17 shows the suction part 3 of the suction device according to the eighth embodiment in a cross-sectional view without a filter inserted.

The suction pipe 7 is arranged in the suction part housing 9, through which the suctioned-in protection flows together with the suctioned-in air and/or liquid. The suction pipe 7 has a suction pipe inlet opening 10 and a suction pipe outlet opening 11. In this embodiment, the dirt suction opening 1 is simultaneously also the suction pipe inlet opening 10, which, however, does not necessarily have to be the case regardless of the other features.

In this design, all dirt sucked in through the dirt intake opening 1, all air sucked in through the dirt intake opening and all liquid sucked in through the dirt intake opening first passes through the suction pipe 7.

A spring-loaded and/or elastic closure flap 12 is arranged on the suction pipe 7 in the region of the suction pipe outlet opening 11, which flap opens automatically due to the fluid flow during operation of the suction device and closes automatically when the suction device is switched off.

Fig. 18 shows the suction part of the suction device according to the eighth embodiment in a cross-sectional view with the filter inserted.

The suction part 3 has a liquid separator 6, which is implemented, among other things, by a special arrangement of a suction pipe 7 relative to a filter housing 8. The liquid separator 6 has, among other things, a labyrinth for the fluid flow, through a special arrangement of a suction pipe 7 relative to a filter housing 8. In addition, the liquid separator 6 is also formed by a special design and arrangement of the filter housing 8.

The filter housing 8 is inserted into the suction part housing 9, which has a filter housing inlet opening 13 and a filter housing outlet opening 14 and which includes a filter 15 for removing dirt from the air stream.

In order to prevent the penetration of coarser dirt particles into the filter housing 8, a sieve 16, in particular a stainless steel sieve, is inserted into the filter housing inlet opening 13, in particular in a manner that can be removed again in a non-destructive manner and/or without tools.

The filter housing inlet opening 13 is arranged adjacent to the suction part housing 9 in such a way that only a narrow gap 17 is formed between the edge of the filter housing inlet opening 13 and the suction part housing.

The labyrinth of the liquid separator 6 is also realized, among other things, in that the axial distance 18 of the filter housing inlet opening 13 to the dirt intake opening 1 is smaller than the distance 19 of the suction pipe outlet opening 11 to the dirt intake opening 1. In addition, the distance 20 of the suction pipe outlet opening 11 to the drive part 4 is smaller than the distance 21 of the filter housing inlet opening 21 to the drive part 4.

Opposite the suction pipe outlet opening 11 there is an impact surface 22 against which the sucked-in fluid, together with the dirt, collides. The impact surface 22 is part of an outer surface of the filter housing 8. The sucked-in liquid adheres to the impact surface and then drips off and remains in a receiving space 23. Larger sucked-in dirt particles also lose their kinetic energy by impacting the impact surface 22 and also remain in the receiving space 23.

The receiving space 23 for dirt (in particular for larger dirt particles such as bread crumbs, stones and the like) and sucked-in liquid is formed by a part of the suction part housing 9.

1 dirt intake opening

2 clean air outlet openings

3 suction part

4 drive parts

5 fans

6 liquid separators

7 intake manifold

8 filter housings

9 suction part housing

10 intake manifold inlet opening

1 1 intake manifold outlet opening

12 closure flap

13 filter housing inlet opening

14 filter housing outlet opening

15 filters

16 sieves

17 gaps

18 Distance between the filter housing inlet opening 13 and the dirt intake opening 1

1 Distance between the suction pipe outlet opening 1 1 and the dirt intake opening 1

20 Distance between intake manifold outlet opening 1 1 and drive part 4

21 of the filter housing inlet opening 21 to the drive part 4

22 impact surface

23 recording room

24 drain opening

25 Drain opening closure

26 hinge

27 locking device

28 suction part outlet opening

29 Drive part inlet opening

30 locking breakthrough

31 locking projection

32 handle

33 release button

34 engine

35 wheel

36 impeller chamber 37 engine chamber

38 partition wall

39 drive shaft

40 shaft seal

41 control device

42 energy storage units

43 push buttons

44 filter housing cover

45 engine shield

46 drive housing

47 fitting opening

48 bearing plate

49 Counterfit extent

50 liquid sensor

51 electrical contact elements

52 cables

53 additional suction part

54 puller lip

55 alignment device weight body

56 axis of rotation

57 pivot point

58 bellows

59 marking

60 electrical charging contacts

61 swivel joint

62 window cleaning nozzle

63 shift projection

64 detector elements

65 final section

Claims

patent claims 1 . Suction device which has a dirt intake opening (1 ) through which air and dirt can be sucked into the suction device from the outside, and which has a clean air outlet opening (2) through which filtered air flows out, wherein the dirt intake opening (1 ) is formed on a suction part (3) which has a liquid separator (6) or is designed as a liquid separator (6) and which has a suction part housing (9) and which is detachably coupled to a drive part (4) which has a fan (5) and the clean air outlet opening (2), wherein the suction part (3) has a suction pipe (7) which has a suction pipe inlet opening (10) and a suction pipe outlet opening (1 1 ) and through which sucked-in protection flows together with sucked-in air and/or liquid, wherein the dirt intake opening (1 ) is formed by the suction pipe inlet opening (10) or is fluidically connected to the suction pipe inlet opening (10) is connected, characterized in that a. the suction pipe (7) ends freely in the suction part housing (9), and/or that b. a filter housing (8) is arranged in the suction part (3), which has a filter housing inlet opening (13) and a filter housing outlet opening (14) and which contains a filter (15) for removing dirt from the air flow, wherein an end section (65) of the filter housing (8), which has the filter housing inlet opening (13), ends freely in the suction part housing (9). 2. Suction device according to claim 1, characterized in that the suction part (3) has a receiving space (23) for, in particular, coarser, dirt and sucked-in liquid. 3. Suction device according to claim 2, characterized in that the suction pipe (7) ends freely in the receiving space (23). 4. Suction device according to claim 2 or 3, characterized in that the receiving space (23) is at least partially formed by at least a part of the suction part housing (9). 5. Suction device according to one of claims 2 to 4, characterized in that the receiving space (23) is formed by a container arranged in the suction part housing (9). 6. Suction device according to one of claims 3 to 5, characterized in that the receiving space (23) has an automatically operating closing device which opens or closes the receiving space (23) depending on the current orientation of the suction device and/or depending on the operating state of the suction device. 7. Suction device according to claim 6, characterized in that the closure device opens or closes a receiving space access depending on the direction of the weight force acting on a closure device weight body. 8. Suction device according to claim 6, characterized in that the closure device has a spring-loaded and/or elastic closure flap which opens automatically by the fluid flow during operation of the suction device and closes automatically when the suction device is switched off. 9. Suction device according to one of claims 1 to 8, characterized in that the suction part (3) has a suction part outlet opening (28) through which air can flow into the drive part (4). 10. Suction device according to one of claims 1 to 9, characterized in that the suction part (3) has an emptying opening through which dirt and sucked-in liquid can be removed from the suction part (3). 1 1. Suction device according to claim 10, characterized in that the emptying opening is arranged outside the fluid flow. 12. Suction device according to claim 10 or 11, characterized in that the emptying opening is arranged adjacent to the dirt suction opening (1) and/or that the emptying opening is arranged at an end of the suction part at which the dirt suction opening (1) is also arranged. 13. Suction device according to one of claims 10 to 12, characterized in that an emptying opening closure is provided by means of which the emptying opening can be closed in a liquid-tight manner. 14. Suction device according to claim 13, characterized in that the The emptying opening closure is designed as a flap. 15. Suction device according to claim 13, characterized in that the The emptying opening closure is designed as a screw cap or as a snap-in cap. 16. Suction device according to one of claims 13 to 15, characterized in that the emptying opening closure is designed to be operated without tools. 17. Suction device according to one of claims 1 to 16, characterized in that the suction part (3) is elongated, in particular cylindrical. 18. Suction device according to claim 17, characterized in that the suction part (3) has the dirt suction opening (1) at one end and the suction part outlet opening (28) at the other end. 19. Suction device according to one of claims 1 to 18, characterized in that the suction part (3) is coupled to the drive part (4) in a detachable manner without tools and without destruction. 20. Suction device according to one of claims 1 to 19, characterized in that the suction part (3) is releasably coupled to the drive part (4) by means of a coupling device. 21. Suction device according to claim 20, characterized in that the coupling device has at least one coupling element arranged on the suction part (3), in particular on the suction part housing (9) of the suction part, and at least one counter-coupling element arranged on the drive part (4), in particular on a drive part housing of the drive part. 22. Suction device according to claim 21, characterized in that the coupling element and the counter-coupling element are mechanically and/or magnetically connected when the suction part (3) is coupled to the drive part (4). 23. Suction device according to claim 21 or 22, characterized in that the coupling element is arranged in the region of the suction part outlet opening (28). 24. Suction device according to one of claims 21 to 23, characterized in that the coupling element has a locking recess or a locking opening and that the counter-coupling element has a locking hook which engages in the locking recess or the locking opening when the suction part (3) is coupled to the drive part (4). 25. Suction device according to claim 24, characterized in that the counter-coupling element is designed to be remotely controlled. 26. Suction device according to claim 25, characterized in that, in particular in the region of a handle (32) of the drive part, a release button is provided which is mechanically coupled to the counter-coupling element. 27. Suction device according to one of claims 1 to 26, characterized in that the filter housing inlet opening (13) is arranged adjacent to the suction part housing (9) in such a way that a gap (17), in particular an annular gap, is formed between the edge of the filter housing inlet opening (13) and the suction part housing (9). 28. Suction device according to claim 27, characterized in that the gap (17) has a gap width in the range from 1 mm to 10 mm, in particular in the range from 1 mm to 5 mm. 29. Suction device according to one of claims 26 to 28, characterized in that a sieve, in particular a stainless steel sieve, is inserted into the filter housing inlet opening (13), in particular such that it can be removed again without destruction and/or without tools. 30. Suction device according to one of claims 26 to 29, characterized in that the filter housing (8) or at least the part of the filter housing which has the filter housing inlet opening (13) is arranged to be movable relative to the suction part housing (9). 31. Suction device according to claim 30, characterized in that the suction device has an automatically operating alignment device which always automatically aligns the filter housing (8) or at least the part of the filter housing which has the filter housing inlet opening (13) in such a way that the filter housing inlet opening (13) is directed upwards. 32. Suction device according to claim 31, characterized in that the alignment device aligns the filter housing (8) or at least the part of the filter housing which has the filter housing inlet opening (13) depending on the direction of the weight force acting on an alignment device weight body. 33. Suction device according to one of claims 26 to 32, characterized in that the filter (15) is designed as a suspended matter filter, in particular as a HEPA filter. 34. Suction device according to one of claims 26 to 33, characterized in that the filter (15) is inserted in a form-fitting manner into the filter housing (8). 35. Suction device according to one of claims 26 to 34, characterized in that the filter (15) can be removed again into the filter housing (8) without destruction and/or without tools. 36. Suction device according to one of claims 26 to 35, characterized in that the filter housing (8) has a filter housing cover which can be removed, in particular non-destructively and/or without tools, and which has the filter housing outlet opening (14). 37. Suction device according to one of claims 26 to 36, characterized in that the filter housing (8) is inserted into the suction part housing (9) in a form-fitting manner, in particular such that it can be removed again without tools and/or without destruction. 38. Suction device according to one of claims 26 to 37, characterized in that the filter housing (8) can be inserted into the suction part housing (9) through the suction part outlet opening (28) and can be removed again. 39. Suction device according to one of claims 1 to 38, characterized in that the suction pipe (7) is straight. 40. Suction device according to one of claims 1 to 39, characterized in that the liquid separator (6) has at least one labyrinth. 41. Suction device according to claim 40, characterized in that at least part of the labyrinth is formed by the arrangement of the suction pipe relative to the filter housing (8). 42. Suction device according to claim 40 or 41, characterized in that at least part of the labyrinth is formed by the arrangement of the suction pipe relative to the suction part housing (9). 43. Suction device according to one of claims 40 to 42, characterized in that at least part of the labyrinth is formed by the arrangement of the filter housing relative to the suction part housing (9). 44. Suction device according to one of claims 1 to 43, characterized in that a. the distance of the filter housing inlet opening (13) to the dirt suction opening (1 ) is smaller than the distance of the suction pipe outlet opening (1 1 ) to the dirt suction opening (1 ), and/or that b. the distance of the filter housing inlet opening (13) to the suction pipe inlet opening (10) is smaller than the distance of the suction pipe outlet opening (1 1 ) to the suction pipe inlet opening (10), and/or that c. the distance of the filter housing inlet opening (13) to the suction pipe inlet opening (10) is smaller than the length of the suction pipe, and/or that d. the distance of the suction pipe outlet opening (1 1 ) to the drive part (4) is smaller than the distance of the filter housing inlet opening (13) to the drive part (4), and/or that e. the distance between the intake manifold outlet opening (11) and the filter housing outlet opening (14) is smaller than the distance between the filter housing inlet opening (13) and the filter housing outlet opening (14), and/or that f. the distance between the intake manifold outlet opening (11) and the filter housing outlet opening (14) is smaller than the length of the filter housing. 45. Suction device according to one of claims 1 to 44, characterized in that the end of the suction pipe having the suction pipe outlet opening (11) ends freely in the suction part housing (9) and/or in the container arranged within the suction part housing (9) and/or in the receiving space (23). 46. Suction device according to one of claims 2 to 45, characterized in that the suction pipe outlet opening (11) is arranged in the receiving space (23) for dirt and sucked-in liquid or immediately adjacent to the receiving space (23) for dirt and sucked-in liquid. 47. Suction device according to one of claims 1 to 46, characterized in that the drive part (4) is elongated, in particular at least partially cylindrical. 48. Suction device according to one of claims 1 to 47, characterized in that the drive part (4) has a main body and a handle (32). 49. Suction device according to claim 48, characterized in that a. the main body is elongated and/or substantially cylindrical, and/or that b. the handle (32) is elongated and/or substantially cylindrical. 50. Suction device according to claim 48 or 49, characterized in that the main body and the handle (32) are arranged coaxially to each other. 51. Suction device according to one of claims 1 to 50, characterized in that the drive part (4) has a drive part housing. 52. Suction device according to one of claims 47 to 51, characterized in that the drive part (4) has a drive part inlet opening (29) at one end. 53. Suction device according to claim 52, characterized in that the drive part (4) has the handle (32) at the other end. 54. Suction device according to one of claims 9 to 53, characterized in that the suction part outlet opening (28) is arranged immediately adjacent to the drive part inlet opening (29) when the suction part (3) is coupled to the drive part (4). 55. Suction device according to one of claims 1 to 54, characterized in that the drive part (4) includes a fan (5) which has a motor and an impeller driven by the motor. 56. Suction device according to claim 55, characterized in that the drive motor is designed as a brushless electric motor. 57. Suction device according to claim 55 or 56, characterized in that the drive part (4) has an impeller chamber in which the impeller is arranged, and a motor chamber in which the motor is arranged, wherein the impeller chamber and the motor chamber are chambers separated from one another by a partition wall. 58. Suction device according to claim 57, characterized in that at least a part of the partition wall is formed by a motor shield of the drive motor. 59. Suction device according to claim 58, characterized in that a fitting opening, in particular a frustoconical opening, in particular in a part of the partition wall forming the bearing shield, into which the motor shield, which is provided with a counter-fitting circumference, is precisely inserted. 60. Suction device according to one of claims 57 to 59, characterized in that the impeller chamber is at least partially formed by a part of the drive part housing. 61. Suction device according to claim 60, characterized in that the impeller chamber has the clean air outlet opening (2). 62. Suction device according to one of claims 57 to 61, characterized in that the motor chamber is arranged outside the fluid flow. 63. Suction device according to one of claims 1 to 62, characterized in that the suction power is variable. 64. Suction device according to claim 63, characterized in that two suction power levels are provided, namely a dry cleaning suction level for sucking in exclusively dry dirt and a wet cleaning suction level for sucking in liquid. 65. Suction device according to claim 64, characterized in that a. the electrical drive power of the drive motor in the dry cleaning suction stage is higher than in the wet cleaning suction stage, or that b. the electrical drive power of the drive motor in the dry cleaning suction stage is two to four times, in particular three times, higher than in the wet cleaning suction stage. 66. Suction device according to claim 64 or 65, characterized in that a. the electrical drive power of the drive motor in the dry cleaning suction stage is in the range from 100 W to 200 W, in particular 150 W, and/or that b. the electrical drive power of the drive motor in the wet cleaning suction stage is in the range from 25 W to 75 W, in particular 50 W. 67. Suction device according to one of claims 64 to 66, characterized in that a. the suction negative pressure in the dry cleaning suction stage is higher than in the wet cleaning suction stage, or that b. the suction negative pressure in the dry cleaning suction stage is higher by a factor of 1.5 to 2.5, in particular by a factor of 2, than in the wet cleaning suction stage. 68. Suction device according to one of claims 64 to 67, characterized in that a. the suction vacuum in the dry cleaning suction stage is in the range of 12 kPa to 20 kPa, in particular 16 kPa, and/or that b. the suction negative pressure in the wet cleaning suction stage is in the range of 6 kPa to 10 kPa, in particular 8 kPa. 69. Suction device according to one of claims 64 to 68, characterized in that a manually operable switch is provided for switching between the suction power levels. 70. Suction device according to one of claims 64 to 69, characterized in that an automatic switching device is provided which automatically switches between the suction power levels. 71. Suction device according to claim 70, characterized in that the automatic switching device switches between the suction power levels depending on whether the sucked-in fluid contains a liquid. 72. Suction device according to claim 70 or 71, characterized in that a liquid sensor (50) is present and that the automatic switching device automatically switches from the dry cleaning suction stage to the wet cleaning suction stage as soon as the liquid sensor (50) detects the suction of liquid and/or the presence of sucked-in liquid in the suction part (3). 73. Suction device according to claim 72, characterized in that the liquid sensor (50) is arranged in the region of the dirt suction opening (1) or in the collecting region. 74. Suction device according to one of claims 70 to 73, characterized in that the automatic switching device automatically switches between the suction power levels depending on the orientation of the suction device in the room. 75. Suction device according to claim 74, characterized in that the automatic switching device includes a position sensor, in particular an acceleration sensor. 76. Suction device according to claim 74 or 75, characterized in that the automatic switching device switches from the dry cleaning suction stage to the wet cleaning suction stage when it detects that the suction device is held by the user in such a way that the dirt suction opening (1) is arranged above the drive part. 77. Suction device according to one of claims 1 to 76, characterized in that at least one further suction part (3) is present, which can be coupled to the drive part (4) in exchange for the suction part (3). 78. Suction device according to one of claims 70 to 76 in combination with claim 77, characterized in that the automatic switching device adjusts the suction power level automatically depending on which of the suction parts is currently coupled to the drive part (4). 79. Suction device according to claim 78, characterized in that at least one of the suction parts has a switching element characteristic of the suction part (3), for example a switching projection, which cooperates with a detector element of the drive part when the suction part (3) is coupled to the drive part (4). 80. Suction device according to one of claims 77 to 79, characterized in that the further suction part (3) is a window cleaning suction part which has an elastic squeegee lip. 81. Suction device according to one of claims 1 to 80, characterized in that the Suction device is designed and suitable to be held and operated exclusively with one hand, in particular on the handle (32), during a suction process. 82. Suction device according to one of claims 1 to 81, characterized in that the suction device contains an electrical energy storage device, in particular a battery.