EP2701568A1

EP2701568A1 - Liquid aspirator for drawing off and sucking up liquids

Info

Publication number: EP2701568A1
Application number: EP12724975.3A
Authority: EP
Inventors: Klaus-Jürgen Fischer
Original assignee: Leifheit AG
Current assignee: Leifheit AG
Priority date: 2011-05-27
Filing date: 2012-05-29
Publication date: 2014-03-05
Anticipated expiration: 2032-05-29
Also published as: EP2959814B1; DE202012012815U1; CN203815383U; US9021654B2; DE202012012814U1; EP2820989B1; US20150208886A1; EP2959814A1; DE102011050697A1; PL2820989T3; CN204169772U; US9615705B2; DK2701568T3; EP2701568B1; EP2820989A3; US20140109340A1; WO2012163926A1; EP2820989A2

Abstract

Liquid aspirator for drawing off and sucking up liquids, having a drawing-off lip (7), having a suction device for sucking up the liquid into a separating space (8) in the housing (1) of the liquid aspirator, having an exhaust-air channel (3), which is subjected to a negative suction pressure and is intended for leading the air out of the separating space (8), having a separating device (13), which is arranged in the separating space (8) and separates the liquid from the water, and having a tank for accommodating the liquid. Complex guidance of the liquid/air stream is avoided in that the housing (1) has a hollow chamber (2) which forms the separating space (8) and the tank, and into which the intake channel (4) opens and from which the exhaust-air channel (3) is guided out of the housing (1); wherein the hollow chamber (2) contains a motor-driven rotor (6) with a rotating impact surface, and the intake channel (4) is designed such that the air/liquid stream is directed for radial direction reversal and acceleration onto the impact surface.

Description

LIQUID SUCTION PREPARATION FOR REMOVING AND SUCKING LIQUIDS

Technisches GebietTechnical area

The invention relates to a Flüssigkeitsssaugvorrichtung for withdrawing and absorbing liquids with a puller formed by at least one Abziehlippe for withdrawing and collecting the liquid before at least a suction mouth, a suction device, a mixed with the liquid aufzusaugenden air / liquid flow along a flow path of the Suction mouth is able to suck through a suction channel into a arranged in a housing of the liquid suction device Abscheideraum, an acted upon by suction vacuum exhaust duct for discharging the air from the separation chamber, a separator disposed in the separation device for separating the liquid from the air sucked air - / liquid flow deflects and with a tank for receiving the separated liquid.

Stand der TechnikState of the art

Such a liquid suction device is known from US 4,831,685 A known. This device is designed as a water aspirator and has a tank in which a flow deflection is provided, the sucked air / water mixture deflects radially outward, the suction channel like a nozzle flows into the tank and directed the aspirated mixture of water and air on a lens-like baffle element is, from which it flows at least 90 ° deflected outward. The drainage channel also protrudes into the tank and has an opening at the top through which the run separated from the water can flow out of the tank or is sucked out.
The disadvantage of this device is that water can run out of the tank into the exhaust duct when the device is rotated. In particular, when a window is to be cleaned with the device, but there is the danger or need to turn the device, as it is known from a manual Fensterabzieher ago, multiple times or even once to operate overhead.
Another Flüssigkeitsssaugvorrichtung for removing and absorbing liquids of this kind is from the DE 10 2008 004 964 B and also from the DE 10 2008 004 965 B known. The known devices have to avoid the above drawback on a flow channel, which leads from a front Abziehlippe to an air outlet in the rear of the device. Via a suction mouth, liquid collected by the draw-off lip is sucked together with ambient air into the device, which is separated from the air in a separation chamber and fed to a tank.
For separation of liquid and air, a separation device is provided in the deposition chamber, which consists essentially of a profile for deflecting the flow of the water / air mixture. This deflection causes the heavier water to bounce against the profile and drip from there into temporary storage tank and, with proper orientation of the unit, drain into a tank. The air, on the other hand, can follow the vacuum and is sucked around the profile into the exhaust duct.
The disadvantage of the known devices is that the liquid first accumulates in the latches and only when the device is held in an upright position with upwardly directed Abziehlippe, the latches are emptied by the fact that the liquid flows into the tank.
A similar device shows the US 2010/0050368 A however, also having a separate tank protected by check valves for emptying in an unfavorable position of the device.

Darstellung der ErfindungPresentation of the invention

The object of the invention is therefore to provide a suction device for liquids, which is inexpensive to produce, has the smallest possible volume and with the best possible storage of the separated liquid is able to separate them from the intake air.
This object is achieved according to the invention in that the housing has a separating chamber and the tank forming hollow chamber into which the intake port and in which the separation device is arranged such that the sucked air / liquid flow is deflected into the tank, said the exhaust duct is in fluid communication with the tank and a flow labyrinth is provided as splash water protection before entering the exhaust duct.
According to the invention, the liquid is then deflected directly into the tank. For this purpose, the tank and the separation chamber are combined with each other, that is, the intake port opens into the tank, which forms the separation space with its central region.
In a preferred embodiment of the intake opens with a free pipe socket in the tank. The resulting flow of the liquid / air mixture then impinges on the separator arranged at the outlet. This has the form of a baffle plate, which deflects the flow radially outward into the tank. The separation device may be stationary or rotating.
In the case of a fixed separating device, this may be formed by a disc which becomes thinner from the inside to the outside, the contour, on which the flow impinges, following a curved outwardly directed flow line. That is, the separation device has, for example, the shape of a cone or a valve stem. Preferably, it deflects the flow as far as possible with a large deflection angle but low resistance in order not to obstruct the flow of air on the one hand and thus to minimize energy consumption and, on the other hand, optimizing the separation function as much as possible by the changes in direction.
Also, the exhaust duct projects in a preferred embodiment with a pipe socket in the tank. Alternatively, it can also be flush with the tank wall. In all cases, it should be provided with a mean that prevents or at least suppresses that water enters the exhaust duct and is expelled with the air flow from the device.
Preferably, the means for retaining the water is a flow labyrinth. Together with the separation device, this forms an effective protection against ingress of water without requiring special rest chambers for the flow beyond the tank. For this purpose, for example, a kind of cap is placed on the projecting into the tank pipe socket, which reverses the air flow twice in its flow direction. For this purpose, the cap may be closed at the front and extend with a wall portion long of the exhaust duct forming the pipe socket, wherein between the pipe socket and the cap an annular gap or other air passages remain, through which the air can flow initially substantially parallel to the nozzle axis back to the front until it reaches the front portion of the cap in its interior, where then the air flow in its direction is again reversed and can enter the pipe socket.
The annular gap is preferably designed so that, when the device is held horizontally, water that enters the annular gap runs back into the tank again. For this purpose, for example, the annular gap in the direction of the end of the pipe socket may be slightly widened in diameter. Also in the pipe socket additional means may be provided to direct water out of the nozzle, which has occurred despite all precautions. These can be, for example, small drain holes that return water back into the tank. A circumferential annular gap can also be provided in the exhaust air duct. Possible leakage air currents can be accepted, as long as a sufficiently large proportion of air is extracted.
As a result of the embodiment of the liquid suction device according to the invention, the liquid / air mixture is sucked in from the suction mouth via the intake channel and directed onto the separating device by the shaping of the intake channel, if necessary by the aid of a further flow guidance profile. As an alternative to the stationary baffle plate, the separation device can also be designed as a rotor, which then functions as a dynamic separation device.
As with the known liquid suction devices, the device has a Abziehlippe in the front region and is preferably designed as a one-handed device. For this purpose, the housing has a handle with which it is held, so that it can be performed like a conventional window wiper, for example, along a glass so that the liquid can be removed from this glass and sucked up at the same time.
Behind the Abziehlippe, in the area in which collects the liquid, the suction mouth is provided, which may be formed as a slot die. A typical application of the invention is, for example, a window cleaning device with which water can be withdrawn and filed for cleaning the window. For this purpose, in addition to the suction lip and a sponge may be arranged, which can be employed depending on the orientation of the device instead of the Abziehlippe to the window so as to first clean the window wet. Here, in addition, a liquid feed can be provided, can be pumped by the manual or motor cleaning liquid before the Abziehlippe or sponge or directly into the sponge.
In an alternative embodiment of the invention, the Abziehlippe can also be bent or V-shaped, so that the withdrawn liquid is collected in the central region, where then a different shaped, for example, point-wise suction mouth can suck the liquid. The embodiment will be particularly suitable for devices which have a movable Abziehlippe and are provided in particular for the ground or other horizontal surfaces.
From the suction mouth, a flow path leads via the intake channel into the hollow chamber and from there via the exhaust air duct to a rear outlet, from which the air, in whose hollow chamber the liquid was separated, can emerge again. The suction effect is generated by a rotor which produces (not described here in detail) a negative pressure driving the flow, as is the case with the known liquid suction devices. This rotor is driven by a motor, wherein the motor is preferably powered by a battery or batteries to ensure location independence.
An essential feature of the general concept of the invention is the fact that the liquid / air flow is directed directly into the tank and the water is separated both when entering and exiting the tank. By separating the separating agents into a front separating device and a rear splash guard, the water can be effectively separated from the air without the need for space-consuming temporary storage. Instead, the available space can be used directly for the tank volume.
A further preferred embodiment of the invention has a separation device in the form of a moving rotor. Here, the motor drives for driving the suction pressure generating rotor preferably also designed in the form of a front rotor deposition device within the hollow chamber. For this purpose, the drive motor is first connected to the turbine wheel designed, for example, the rotor wheel of the suction unit and offset this in rotation. As in the case of a conventional vacuum cleaner, this results in the negative pressure, so that air is conveyed through the housing through the intake duct, the hollow chamber and the exhaust air duct. This suction unit is then connected via a further drive shaft with the front rotor, which acts here as a separator.
An essential feature of this aspect of the invention is the fact that the liquid / air mixture sucked in via the intake duct no longer impinges exclusively on a separating baffle plate but on the motor-driven rotor arranged in the hollow chamber. At the same time, an area of this hollow chamber forms the tank and also the separation chamber, within which the rotor ensures the separation of the liquid from the mixture.
For separating the liquid from the aspirated liquid / air flow, the rotor has at least one impact surface on which the flow is directed. Typically, this impact surface will not communicate directly with the flow, but will cause a reversal in the direction of air flow as the flow obstruction, while the heavier fluid particles of the flow impact the impact surface or are steered in a direction other than air due to their inertia. Thus, the air will essentially follow the vacuum and take the shortest flow path.
The liquid, on the other hand, is not deflected so quickly because of its higher inertial forces and therefore describes a trajectory with larger radii. This leads on the one hand to the fact that the two media follow different flow paths and on the other hand that the liquid bounces due to the larger required flow radius against side walls or on the rotor itself. The latter, in turn, causes the liquid to be separated from the air stream and collected in the annular cavity surrounding the suction channel, the deposition chamber and the exhaust channel.
Due to the fact that the impact surface is now outside the intake passage, the rotor wheel may have a substantially larger diameter than the inner diameter of the intake passage. So that the impact surface is hit by the flow, flow guide profiles can be arranged in the intake channel or shortly behind it, which deflect the flow onto the impact surface.
Preferably, a Strömungsleitprofil is used, which may be formed, for example, bell-shaped or cone-shaped, wherein the tip is arranged in the intake passage and the rearwardly widening portion deflects the flow to the outside. This flow then impinges in the outer region on the annular impact surface, wherein the liquid components are then accelerated by the rotating rotor wheel and thrown into the outer region of the hollow chamber. From the inner outer wall, they will then drain down, the device is usually held in the operating position so that the Abziehlippe is up and around the exhaust duct, the separated liquid.
The housing may be formed in two parts, so that either the hollow chamber can be removed together with the entire tank. For this purpose, it can be provided, for example, that the hollow chamber is designed as a separate, for example, cylindrical component which can be plugged onto the exhaust air duct or the supply air duct, wherein the parting plane of the housing lies in the region of the hollow chamber. Preferably, the housing is provided with a safety switch, which shuts off the engine when opening the housing or prevents switching on the motor by interrupting the power supply. Alternatively, the hollow chamber may also be formed by the housing itself, so that the inside of a section of the housing forms the outside of the hollow chamber. In this case, two partitions are provided in the housing, one of which has a passage for the intake passage and a passage for the exhaust air passage.
In the case of the two-part design of the housing, this can then be opened for emptying or cleaning. At the front housing part, for example, the feed channel may be provided, which is pulled out of the hollow chamber with the front housing part of the remaining housing. Annular seals can seal off the intake passage so that, while it can be pulled out, on the one hand, with the front housing part, on the other hand, it can also be put together in a sealing manner. If the front housing part removed, then the hollow chamber can be deducted as a hollow cylindrical member of the exhaust duct, which in turn can be sealed by ring seals.
The above-mentioned embodiment makes it possible to disassemble and clean the housing and usefully also the hollow chamber itself. For this purpose, the hollow chamber in turn may be formed in two parts, so that they can be disassembled into two housing halves. The separator forming the rotor may also be designed to be removable, so that this can be easily cleaned. If the hollow body forming the cylindrical body is formed in two parts, of course, the two parts must also be connected to each other via seals, so that when lying device, a liquid can escape from the cavity.
The essential feature is namely the fact that the liquid, which is in the liquid / air flow, is thrown outwards or separated from the air flow via the rotor, so that liquid can then accumulate in the cavity serving as a tank, later to be evacuated. Since the liquid suction device will be designed in most cases as a handheld device, which is used as a window puller in a transverse position or even over the head, it is important that the liquid can not leak through the intake again. For this reason, the suction duct protrudes into the cavity with a pipe socket, so that even in the overhead position, liquid remains around this intake pipe in the tank and does not run out of the suction duct.
The same applies if the device is used in an upright position, ie the suction lip is arranged at the top. Here then projects the neck of the drainage channel into the cavity, so that around the neck of this drainage channel in turn results in a cavity in which liquid can be collected without this could run down through the exhaust duct. In summary, therefore, the tank is formed by a region of the hollow chamber in which the suction channel and the exhaust duct are introduced from above and below, so that is ensured due to the nozzle-like projecting channel ends in all orientations of the device that the liquid separated from the air flow not can run out again. This function can be enhanced by a cross section of the intake duct or of the drainage channel that widens slightly in the direction of the interior of the hollow chamber.
There are basically several options for emptying the device. On the one hand, the cavity forming the tank can be closed by means of a plug, which releases a way to the outside. So here is an emptying channel connected to the cavity through which the device can be emptied. On the other hand can be done via the above-described cleaning function by the division of the housing and the cavity emptying. For this purpose, the device is simply taken apart as already described and emptied half of the cavity after its disassembly.
A third possibility of emptying is that the intake duct or the exhaust duct are slidably mounted in the housing, so that one of the two parts can each pull out until no pipe socket protrudes into the cavity. In this way, for example, the device can be turned upside down and the suction channel, which can be firmly connected to the Abziehlippe example, be pulled forward. Due to the fact that this eliminates the pipe socket projecting into the cavity, the flow resistance is canceled and the liquid in the cavity can run out.
By means of electrical contacts it can be ensured that the device can only absorb its suction function when the intake duct is in the correct position, ie in the inserted position. For this purpose, simple contacts may be provided on the intake passage, which interrupt the suction channel pulled out by the motor drive of the suction unit. In the same way, a discharge function can be realized on the part of the exhaust duct, in which case the liquid can be emptied through the extracted exhaust duct.
Additional valve means can be provided both on the exhaust duct side and on the intake duct side, which, for example, can additionally seal off the exhaust duct or the intake duct as pure flaps if liquid threatens to escape due to an unfavorable rotation of the apparatus.
However, one of the essential aspects of the invention is the fact that protrudes into the cavity of the Abziehlippe the intake duct with its pipe socket, while opposite the exhaust duct also projects into the cavity. Between the two pipe sockets creates a gap in which the rotor is arranged, which acts here as a separator. The liquid / air flow impinges on this rotor, wherein between the intake passage and the rotor, a gap is provided, which on the one hand small enough to maintain the suction pressure and on the other hand is large enough, without large power losses, the liquid / air flow through the Device to promote.
By the rotating rotor, the liquid which impinges on the rotor due to the inertia or is deflected by the rotor, promoted in the outer region of the cavity, while the much less inertial air by the negative pressure applied by the suction unit at the exhaust duct, from is sucked out of the cavity. In principle, for example, the nozzle of the exhaust air channel projecting into the cavity can have an air inlet opening over its circumference, so that the air can be sucked out of the cavity.
In contrast, a further preferred embodiment has a rotor which is permeable in the middle and is arranged directly in front of the connecting piece of the exhaust air duct projecting into the cavity. In this embodiment, the drive shaft for the rotor extends through the exhaust air duct, so that the rotor and the drive shaft are arranged concentrically to the cylindrical drive channel. In order for the separation function to be ensured, a flow-guiding profile can be provided in the intake channel in this embodiment, which guides the flow out of the intake channel to the outside. The rotor has, surrounding the opening for the entry into the exhaust duct, a pipe socket which projects into the here bell-shaped or cone-shaped flow guide.
Between this pipe stub on the rotor and the Strömungsleitprofil remains a small gap through which the air can pass into the exhaust duct after multiple reversal of direction, while the liquid occurs on the impact surface of the rotor or an air flow close to the impact surface due to the movement of the rotor directed to the outside, is conveyed into the cavity. Ultimately, it is not significant whether a part of the air is conveyed together with the liquid in the cavity, as long as ensured by the geometry of the exhaust duct or the air inlet into the exhaust duct that aspirated via the intake air without the liquid sucked parallel through the Exhaust duct is sucked off again.
Preferably, the window cleaning device may also be provided with an on and off function, which either the motor drive of the suction unit completely or down to avoid too long recovery times in the performance. The on and off function is designed in one possible embodiment such that a pressure on the Abziehlippe turns on the device or increases the engine power. Decreasing pressure can then cause the power to turn off or reduce.
Alternatively, a timer may be provided which shuts off or reduces after a certain, predetermined suction time. Finally, an orientation switch is also possible or in addition, which turns off the suction unit or shuts down when the device is tilted or pivoted from an upright position with Ababhlippe arranged above. Since or even in transverse movements with laterally positioned Abziehlippe a suction effect may be desired, the orientation switch can be designed so that it is activated only when the Abziehlippe points down. A delay switch can delay the switch-off function, so that a short swing does not have any influence on the motor function.
To implement the pressure switch, the Abziehlippe can be easily against the force of a return spring or elasticity of the component itself pivotally mounted on the housing, the pivotal bearing comprises a button that is able to detect a slight backward pivoting of the Abziehlippe and convert it into a switch-on. Similar to a stand-by circuit, this can be done via a secondary circuit, so that an initial pressure on the Abziehlippe the device activated in total.
A further embodiment of the invention has a Abziehlippe which is formed together with the suction mouth as a separate component and is inserted into the device, wherein the suction port is connected via a sealing pipe plug connection with the intake passage. This embodiment has the advantage that the functional unit, which is formed by the Abziehlippe and the suction mouth, can be completely removed and can be connected via a hose to the device. This makes it possible to attach this functional unit to a handle or hose and so to create a lightweight puller with suction function, while the rest of the device is either worn on a strap for example by the operator or as a floor standing on the floor. Here, the stem is provided with a suction channel or hose and can be connected to the device on one side and the unit of Abziehlippe and suction mouth on the other side, so that on the suction channel or hose, the water in front of the suction mouth and absorbed can be.
Alternatively or additionally, only the Abziehlippe can be made removable. This makes it possible to use the Abziehlippe independently of the device when the suction function is not needed.
Finally, the housing, in particular on the, opposite the suction mouth back, have a receptacle for a stem. This is preferably a universal receptacle for stems of household appliances, which are already present in the household anyway. In this case, the stem, which may also be formed as a telescopic handle, are easily attached to the housing. Also in this way, the range of the user can be easily and simply increased.
The Abziehlippe and optionally also the suction mouth can also be rotatably or pivotally mounted on the housing, which can be done for example via a sealing ball joint that is arranged in the connection between the housing and the Abziehlippe and the suction mouth having unit. This ball joint can be designed so that the intake passage is passed through the joint. Alternatively, the suction channel can also be guided laterally past the joint in the form of a tube.
Further features and advantages of the invention will become apparent from the subclaims and from the following description of a preferred embodiment with reference to the drawings.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

In the drawings shows:
1 shows a liquid suction device according to the invention in a plan view, partly in section,
FIG. 2 shows the liquid suction device shown in FIG. 1 in a side view in section with a first embodiment of the separating device,
3 shows the liquid suction device shown in Figure 1 in a side view in section with a second embodiment of the separator and
4 shows the region of the rotor of the liquid suction device shown in Figure 3 in an enlarged view.

Bester Weg zur Ausführung der ErfindungBest way to carry out the invention

FIG. 1 shows a liquid suction device according to the invention. In the illustration, the upper area is uncut, the lower area shown in section, wherein for reasons of clarity on the representation of the cut edges of the housing 1 has been omitted.
The device has in the front region a Abziehlippe 7, which is able to extract liquid from a surface. The classic application of this device is the removal of water from a window surface. Behind the Abziehlippe 7 a suction mouth 5 is arranged, which is here designed as a wide nozzle whose width substantially corresponds to the width of the Abziehlippe 7. Via a suction channel 4, the liquid / air mixture is sucked into a hollow chamber 2, wherein in the hollow chamber 2, a separation chamber 8 is provided with a separation device which is able to separate the liquid from the air flow.
The further function of the device will be described in greater detail below with reference to the sectional view in FIGS. 2 and 3 and the detailed view in FIG. 3:
In the housing 1, the hollow chamber 2 is provided as a central, tank-like component. This hollow chamber 2 combines different functions of the Flüssigkeitsssaugvorrichtung together. First, it is the tank into which separated liquid can be collected, which has been separated from the liquid / air mixture. On the other hand, the separation chamber 8 is also integrated here, in which the separation of the air from the liquid takes place. Finally, the hollow chamber 2 forms a protection against re-leakage of the deposited liquid.
In the hollow chamber 2 each project with a pipe socket of the exhaust duct 3 and the intake passage 4. These two channels are arranged concentrically to each other and run towards each other, wherein between the ends of the two channels, the separation device 13 is arranged.
Figure 2 shows a first embodiment of the invention with a rigid separation device 13, which is designed here as a stator and deflects the flow radially outward into the tank.
In the rear of the tank, the exhaust duct 3 projects into the tank. In order that no spray water is taken into the exhaust air duct 3, the exhaust nozzle 3 is provided with a flow labyrinth 12 that, as can be seen from the air flow schematically indicating arrow, forces a double reversal of direction of flow and thus separates residual water from the air that in Tank remains.
In the embodiment shown in Figure 3 is in the gap between the drain passage 3 and intake passage 4 remains, in which a rotor 6 is arranged. This rotor 6 in turn is driven via a drive shaft 9, wherein the drive shaft 9 is arranged concentrically to the exhaust air duct 3. The rotor 6 protrudes with impact surfaces laterally beyond the exhaust air duct 3 into the hollow chamber 2.
In the end region of the exhaust duct 3 has a flow guide 10, which here has the shape of an internally hollow truncated cone. This truncated cone derives the aspirated mixture of water and air in the intake duct 4 to the outside, so that it meets the outer region of the rotor 6, which forms the impact surface here. This causes the sucked liquid / air flow in the radial direction and also in the circumferential direction of the rotor 6 is accelerated, wherein the carrier liquid describes a different trajectory than the lighter air.
As can be seen from Figure 3, the engine and the suction unit are in the rear of the housing 1, in which the power supply is arranged in the form of a battery. This causes the center of gravity of the device to be displaced to the rear so that it can be easily moved in an upright position along a disk or other surface.
In the front region of the Abziehlippe 7 is arranged, behind which the suction mouth 5 is provided. From here, the flow channel extends through the intake passage 4 into the hollow chamber 2.
In Figure 4, the area of the rotor 6 within the hollow chamber 2 is shown again in an enlarged view. As shown, the rotor 6 protrudes into the flow guide 10. For this purpose, it has an annular pipe socket, which projects from the rotor wheel 6 toward the front in the direction of the intake duct 4.
Between this region of the rotor 6 and the flow guide 10 remain small gaps, so that the air to be sucked results in a labyrinth seal, following the inner arrows, first on the outside of the Strömungsleitprofiles 10 flows outside, then a tight curve inwardly descriptive in the Inside the Strömungsleitprofiles 10 is sucked and is sucked from there through the inside hollow rotor wheel 6 in the exhaust duct 3. Such a narrow trajectory can not carry out the carrier liquid and is therefore conveyed radially outwards in accordance with the outer arrows and outwards in the circumferential direction of the rotor wheel. As a result, the liquid collects in the hollow chamber 2, in particular on the inner wall, and flows in an upright device into the lower region of the hollow chamber 2, which then serves as a tank.
The illustrated embodiment of the fluid collection device is just one possible way to make use of the basic principle of the invention. Essential to the invention is the fact that no separate Abscheidekammer is provided and that the liquid / air flow is directed directly to a rotor wheel 6, which exploits the different dynamic inertias of air and liquid due to its rotation to separate the two streams from each other , Furthermore, as illustrated, the rotor wheel 6 can be driven via a drive shaft 9 through the exhaust air duct 3, it being alternatively also possible, of course, for the rotor wheel 6 to be driven by a separate drive.
In the hollow chamber 2, a level sensor may be provided, which may be formed for example by an electrical contact and the engine turns off when a certain liquid level is reached, beyond which it is no longer guaranteed that a liquid through the exhaust duct 3 or the intake 4 can escape. The accumulator arranged in the rear region of the device can preferably be detachably connected to the housing 1, so that it can be removed, for example, for recharging and plugged into a socket. Furthermore, the housing 1 can have a fastening possibility for a handle in the rear region, so that the device can also be used at greater heights.
A further advantageous embodiment has as Abziehlippe 7 a peelable rubber lip, which is fixed for example on a projecting into the housing 1 holding rod such that it is arranged in front of the suction mouth 5 as shown. The support rod can then be designed as a suction tube and be detachably inserted into the housing 1, which has the advantage that the user can remove the Abziehlippe 7 for smaller, difficult jobs without Saugnotwendigkeit and use as a lightweight puller.
LIST OF REFERENCE NUMBERS
1 case
2 hollow chamber
3 exhaust duct
4 intake port
5 suction mouth
6 rotor
7 squeegee
8 separation space
9 drive shaft
10 flow guide
11 intake
12 flow labyrinth
13 separator
14 Bushing for attaching a stem

Claims

Liquid suction device for withdrawing and absorbing liquids with a, by at least one Abziehlippe (7) formed puller for withdrawing and collecting the liquid before at least one suction mouth (5), a suction device, a mixed with the liquid aufzusaugenden air / liquid flow along a flow path from the suction mouth (5) through a suction channel (4) into a, arranged in a housing (1) of the Flüssigkeitsssaugvorrichtung separating chamber (8) is capable of acting on a Saugunterdruck exhaust duct (3) for discharging the air from the separation chamber (8 ) arranged in the separation chamber (8) separating device (13) for deflecting the liquid from the air deflects the sucked air / liquid flow and a tank for receiving the separated liquid, wherein the housing (1) a the separation chamber ( 8) and the tank forming hollow chamber (2), in which the suction channel (4) mü and in which the separation device (13) is arranged and that the sucked air / liquid flow is deflected into the tank, the exhaust air duct (3) is in flow communication with the tank, characterized in that the separation device (13) from an air inlet side Flow deflection, is formed in the form of a stator or rotor, which is arranged before the inlet of the sucked air / liquid flow into the tank on the intake passage (4) or in the tank and deflects the sucked air / liquid flow radially outward into the tank, and a flow labyrinth (12) arranged before the entry into the exhaust air duct (3) is formed as a retaining means for spray water.
Liquid suction device for drawing off and sucking up liquids according to claim 1, characterized in that the flow labyrinth (12) is formed by a cap which covers a nozzle-like air inlet of the exhaust duct (3), wherein the cap protrudes beyond the exhaust duct and between the cap and the Outer wall of the exhaust duct at least one gap, ringpalt- or channel-like air passage is provided so that the air on the outer wall of the exhaust duct (3) between exhaust duct (3) and inside of the cap and then after reversal of direction through the exhaust duct (3) from the tank sucked.
Liquid suction device for drawing and sucking liquids according to claim 2, characterized in that the exhaust duct (3) has a radially outwardly projecting, wall-shaped and completely around the exhaust duct (3) extending around the flow barrier, wherein the cap the flow barrier while leaving an air inlet to Aspirating the air from the tank in the flow labyrinth surmounted so that in each orientation of the liquid suction in the tank water located either flows off the cap or the flow barrier laterally and is prevented from entering the exhaust duct (3).
Liquid suction device for drawing off and absorbing liquids according to one of the preceding claims, characterized in that the flow labyrinth (12) is a motor-driven rotor (6) with a rotating cap.
Liquid suction device for removing and sucking liquids according to claim 4, characterized in that a motor for driving a suction vacuum generating suction unit is provided, wherein the rotor (6) is driven by the same motor as the suction unit and a drive shaft (9) a rotation axis of a rotor of the suction unit is connected.
Liquid suction device for drawing off and absorbing liquids according to claim 5, characterized in that the rotor (6) is the suction vacuum generating suction unit.
Liquid suction device for drawing off and absorbing liquids according to one of the preceding claims, characterized in that the intake duct (4) and / or the exhaust air duct (3) have a pipe socket projecting into the cavity (2).
Liquid suction device for drawing off and absorbing liquids according to any one of the preceding claims, characterized in that in the intake passage (4) a Strömungsleitprofil (10) is arranged, that directs the air / liquid flow to the separation device (13).
Liquid suction device for drawing off and absorbing liquids according to the preceding claim, characterized in that the flow guide (10) is formed such that forms an annular flow of the air / liquid flow.
Liquid suction device for drawing off and absorbing liquids according to the preceding claim, characterized in that the flow guide (10) is bell-shaped with a cross-section widening in the direction of the rotor (6), the annular flow of the air / liquid flow on the outside of the flow guide ( 10) flows past the impingement surface and the rotor (6) projects with an intake stub (11) into a hollow region of the flow guide profile (10) facing it, wherein the exhaust air duct (3) is designed and arranged such that the exhaust air flow separated from the liquid flows through an annular gap between the intake manifold (11) and the inner surface Strömungsleitprofils (10).
Liquid suction device according to one of the preceding claims, characterized in that the Abziehlippe (7) via a releasably connectable to the housing (1) plug-in holder is releasably connected to the housing (1), wherein with removed Abziehlippe (7) of the Einsteckhalter as a handle for use the Abziehlippe (7) serves as a manual puller.
Liquid suction device according to one of the preceding claims, characterized in that the Abziehlippe (7) is movably mounted on the housing (1), wherein the movable mounting comprises a switch which by pivoting the Abziehlippe (7) in an off and on a Position can be placed and the motor drive of the suction unit and the rotor via the switch from the Abziehlippe (7) switch is switched on or off.
Liquid suction device according to one of the preceding claims, characterized in that the housing (1), in particular on its, the suction mouth (5) opposite the back, has a receptacle for a stem into which a stem or a telescopic handle can be inserted and in the Stem can be fastened via a frictional or positive locking.
Liquid suction device according to one of the preceding claims, characterized in that the suction mouth (5) is rotatably mounted relative to the housing (1).