ITMI20010086A1 - VACUUM CLEANER WITH A LIQUID FILTER - Google Patents

Description

Description

The invention relates to a vacuum cleaner, whose suction air stream can be carried on a liquid filter, which is arranged in the vacuum cleaner casing, takes the wetting water from a water tank provided in the casing of the vacuum cleaner. vacuum cleaner and conveys the moistened air stream to a load of water. From DE 4107 535 C2 a vacuum cleaner is known, in which the drawn air stream ascends into a water tank. Even if a multiply convoluted path is formed by means of the fins, the desired intimate contact between very small bubbles of gas and water is not obtained, which certainly moistens very small particles of dust contained in them and the water allows all the dust to be absorbed. .

Vacuum cleaners are also already known, which spray the separate masses of dirt and / or the incoming suction air stream with the pressurized jet of a separate water pump. Here, too, a sufficiently intense action on modest volumes of intake air is not ensured. Added to this is the fact that the additional pump and an additional pure water tank increase the weight as well as the expenditure, the assembly and service costs and the power requirement.

The DE 298 12 110 U1 already illustrates a vacuum cleaner, in which the suction air stream is sprayed with the pressurized jet of a separate water pump fed with water load. In the event of a dirty water load, however, despite filters placed in front of the water pump, there is a risk of breakdowns. Added to this is an expensive absorption chamber which considerably reduces the power of the vacuum cleaner.

Therefore the invention sets itself the task of realizing a vacuum cleaner conforming to the indicated type, which without pressurized water pumps contacts the dust particles in the intake air, quickly and over a long distance, intensely with water, binds them to this and drains them into the water tank. Moreover, conventional aspirators on the market by means of corresponding accessories must be able to be modified so as to obtain aspirators conforming to the aim of the invention.

This problem is solved by the characteristics of claim 1. The suction air stream according to the Venturi principle, passing through the ejector, sucks in enough water and sprays it, while the following diffuser, having a special shape, causes a regularization of the air stream of suction enriched with water particles, where dirt particles precipitate presenting an intimate contact with water. In this case, the speed of the current is continuously reduced at the same time.

In a second stage, the air stream is guided in the direction of the water surface by means of further directing surfaces. This causes a further combination of the dust and dirt particles, subsequently entrained in the air stream, with the swirling water droplets and with the surface of the water bath and leads to a maximum possible separation of the dust. by the current of air in the water bath.

The following particle separator bulkhead with special built-in water filter flap, being passed through, retains last particles of dust and water from the air stream.

Thanks to the design of the diffuser and the droplet separator bulkhead as well as the necessary seals, the formation of dead water spots and short-circuit currents is prevented and thus a safe separation of the dust in the water bath is ensured.

Suitable as well as advantageous developments of the invention are characterized in the sub-claims.

In particular, the invention is illustrated on the basis of the description of exemplary embodiments in combination with drawings which represent them.

In particular:

Figure 1 schematically in longitudinal section shows a vacuum cleaner with vertical mounting of the ejector in the connection nozzle of the suction line on the cover, riser pipelines from the water load to the ejector, as well as with a drop separator bulkhead,

figure 2 schematically shows a vacuum cleaner with a horizontally mounted ejector, in which the suction height is lower,

Figure 3 shows a section through a modified embodiment of a vacuum cleaner, e

Figures 4 and 5 show further embodiments of ejectors for injecting water into the intake air stream,

figure 6 shows a further development of the vacuum cleaner according to figure 1.

In the housing 1 of a vacuum cleaner there is a sealed tank 2, filled with water up to level 3. The suction tube 4 of the vacuum cleaner is inserted into a union 5, which is arranged in a lid 6 closing the opening top of the box 1. The lower end of this union 5 is formed as an ejector 7. From the water load 8 of the tank 2 one or more upright pipes 9 lead to the ejector 7. Compared to a diffuser 10, the union 5 is closed sealed by means of a gasket 11. The intake air VL through the intake tubular 4 enters the casing 1, passes through the ejector 7 and the diffuser 10 downstream from this. After a deflection of 180 ° the intake air flows on the mirror 3 of the water load 8 and through a drop separator bulkhead 12 as well as through filters 13a, 13b and reaches, purified by means of a blower 14 of the intake air only mentioned, the external atmosphere.

With the closure of the lid 6 of the tank 1, the fitting 15 of the upright duct of the ejector 7 draws into the end 16 respectively in the ends 16 of one or more upright ducts 9 at the inlet of the diffuser 10. The gasket 11 prevents a short circuit of the the intake air in the direction towards the opening of the blower 14 of the intake air and causes the targeted introduction into the ejector 7 as well as into the following diffuser 10. By exploiting the dynamic fluid energy of the intake air stream with the The ejector 7 is sucked in air and formed an injection device permanently adding water. The realization of the ejector 7 of the upright conductor 9 at the current speed, usual in blowers for vacuum cleaners, provides for a high flow rate of sprayed water and therefore for a maximum possible wetting with water of the powder contained in the suction air VL.

During operation the ejector 7, with the passage of the suction air VL loaded with dirt, acts as a Venturi nozzle and raises water from the water load 8 through one or more upright ducts 9 in the ejector 7, through whose nozzles it is conveyed to the suction air stream VL and moistens the solid substances found in it in the course of the further dirt stream. The connected diffuser 10 with its continuous widening causes a lowering of the current speed and leads to an optimal wetting. The diffuser 10 ends in front of the wall of the tank 2. The intake air stream VL undergoes a deviation of 90 ° with respect to the water level 3. The air stream is deflected once more by 90 °, i.e. 180 ° overall, and flows between the bottom of the diffuser and the water level 3 through a drop separator bulkhead 12, towards the filters 13. Thus by doing it by means of further guiding surfaces 17 it is deflected several times in the direction towards the water detector. Heavy dirt particles 18 after the first 90 ° deviation due to the centrifugal force are added to the water. Lighter, already wetted particles are separated after 180 ° deviation from the intake air stream towards water level 3. Very fine, very light particles 19 may remain at first still in the air stream and are subsequently separated. These very fine particles 19 are separated by the effect of the multiple deviations and swirls at the guiding surfaces 17 in the water load 8. Thus, the dirt particles wetted according to their size and weight from a path above level 3 of the The water and approximately parallel to this are projected into the water load 8. Correspondingly, the intake air VL corresponding to the arrow 20 is drawn by the blower of the vacuum cleaner above the filters 13.

The diffuser 10 horizontally perimetrically seals the space, enclosed by the tank 2, above the water load 8 with a gasket 21. In the direction towards the blower 14 the intake air VL in accordance with arrow 20 passes through a bulkhead 12 of drop separator, grafted from above, with a special water filtration layer 22 incorporated, where the last particles of dust and water are retained in the layer 22.

The bulkhead 12 of the drop separator is engaged and by means of a gripping part 23 it can be easily removed from the clean area 8b of the water load 8. A gasket 21 here too prevents "short-circuit currents" in front of the filtration layer 22 and p - provides for a closed area of the water swirl bath with maximum possible separation of the dust in the water bath 8 and targeted air conduction, droplet separation and quieting of the air through the aquifer 22.

The bulkhead 12 of the droplet separator is made in one or two parts and is equipped with the flap 22 of the easily removable and cleanable water filter. In the load area 8 the bulkhead 12 separates this roughly into a larger area 8a, loaded with dirt, and into a cleaner suction area 8b for the suction screen 26 of the riser pipe 9. For the crossing of the riser pipe 9 the bulkhead 12 contains a recess 27.

Figure 6 shows the fact that the bulkhead 12 of the drop separator is made in one piece with the diffuser 10. The flap 22 of the water filter, however, can also be taken for cleaning or replacement purposes.

A variant embodiment consists in the fact that the ejector 7 according to Figure 2 is mounted lying down. In this way the average suction height is reduced to 60 mm and therefore the quantity of water sucked is increased.

It has been established that practically all parts of the liquid filter are arranged, namely the water load 8, the ejector 7, and the diffuser 10, conveying and forming the suction current VL, as well as the bulkhead 12 of the separator of the drops in a common tank 2, essentially closed, which rests in the casing 1 against this by means of elastic elements 28. The opening 29 leads to the blower of the suction air not shown here. The internal cleaning as well as the replacement of the load of water 8 loaded with powder can take place after having extracted the tank 2 from the case 1 by means of the gripping part 24.

Figure 2 shows a variant of an ejector with ring injection in the area crossed by the intake air VL.

Figure 3 shows a further variant of the vacuum cleaner. The lid which with union 5 surrounds the suction tubular 4 hermetically closes the easily removable tank 2 by means of the gasket 11. The union 5 contains the ejector 32 and its riser conduit fittings 15 with the closure of the cover 6 engage in the ends 16 of the riser conduits 9, the free ends of which are supported in the suction screen 26.

With a further variant of an ejector, Figure 4 shows an ejector 33 with central water injection. The inlet cone 34 is shaped in such a way that water is fed into the air stream from the annular slot of the suction nozzle 35.

While the ejector 32 of Figure 3 has a shaped shrinkage element (nozzle), to which the water is fed through an annular gap of for example 0.5 mm as a wall jet and to which a mixing part of enlargement, according to Figure 4, the shaped shrinkage element of the ejector 33 is made widening in the direction of the current and encloses the suction pipe 35 which brings in water and whose mouth, maintaining an interspace, is engaged at the top by the inlet cone 34 and it feeds the water centrally to the air-powder mixture. The inlet cone 34 is shaped so that the maximum possible amount of water is sucked up.

Figure 5 shows a shaped shrinkage element 36, to which the mixing part 37 is connected by means of a gap, which for the water supply is provided with holes for the connection of the upright pipes.

Legend

1 crate

2 tank

3 level

4 tubular suction

5 filler

6 lid

ejector

load of water

a dirty water area

b suction area

riser pipeline

0 speaker

1 gasket (filler-lid) 2 droplet separator bulkhead 3rd filter

3b filter

4 suction air blower 5 riser pipe connection 6 riser pipe end

7 guiding surfaces

8 heavy dirt particles

9 very fine particles

0 arrow

1 case-diffuser gasket

2 water filter flap

3 part of grasping

4 part of grabbing

6 suction screen

7 recess

8 elastic elements

9 opening

30 nozzles

31 gasket

32 ejector

33 ejector

34 inflow cone

35 suction pipe

36 shaped shrinkage element 37 mixing part

VL intake air

Claims (1)

Claims 1.-Vacuum cleaner, whose suction air stream (VL) can be fed onto a liquid filter, which is placed in the vacuum cleaner casing (1), takes wetting water from a tank (2) provided in the casing (1) of the vacuum cleaner and feeds the moistened suction air stream (VL) to a water load (8), characterized by the fact that the suction air stream (VL) is conducted on an ejector (7 ), fed through one or more riser pipes (9) from the water load (8) of the tank (2) and into a following diffuser (10), subsequently at reduced speed, precipitates the dirt particles (18), combined with water particles, until very fine particles are obtained (19). 2. Vacuum cleaner according to Claim 1, characterized in that the diffuser (10) capable of guiding the suction air stream (VL) against a wall of the tank (2) acts as a rebound plate. 3. Vacuum cleaner according to Claim 1 or 2, characterized by at least one guiding surface (17) which directs the suction air stream (VL) against the level (3) of the water load (8). 4.-Vacuum cleaner according to one of claims 1 to 3, characterized in that the suction air stream (VL) passes through a drop separator bulkhead (12), where the latter particles of dust and water are retained in a water filter flap (22). 5.-Vacuum cleaner according to one of the claims 1 to 4, characterized in that the diffuser (10) in its area following the ejector (7) continuously expands, is respectively made conically and is shaped in such a way that there are no areas of detachment in which dirt can settle. 6. Vacuum cleaner according to one of Claims 1 to 5, characterized in that after the widening zone of the diffuser (10) there is a 90 ° deviation of the suction air stream (VL) towards the water level (3). 7.-Vacuum cleaner according to one of claims 1 to 6, characterized in that the bottom of the diffuser (10), extending parallel to the water level (3), has guiding surfaces (17) which direct the air stream suction pump (VL) with -a deviation against the level (3) of the water load (8). 8.-Vacuum cleaner according to claims 1 to 7, characterized in that the parts of the liquid filter are arranged in a sealed reservoir (2), so that "short-circuit currents" of the air containing dust passing in front of it are prevented to the water filter, directly towards the suction opening (29) of the blower. 9. Vacuum cleaner according to one of the claims 1 to 8, characterized in that a maximum union and retention of dust in the water bath is achieved following the combination of four chamber zones: ejector (7), diffuser (10 ), water load (8) and droplet separator bulkhead (12) 10. Vacuum cleaner according to one of Claims 1 to 9, characterized in that the drop separation bulkhead (12), on one side and possibly easily removable for cleaning, can be inserted into the tank (2) of the vacuum cleaner. 11. Vacuum cleaner according to one of the claims 1 to 9, characterized in that the bulkhead (12) of the drop separator is joined in one piece with the diffuser (10), which it is possible to remove the flap (22) of the water filter. 12.-Vacuum cleaner according to at least one of claims 1 to 11, characterized by the fact that subsequent filters (13b) of the very fine particles are arranged downstream of the water filters, with a filtration effect up to the size of 0.3μιη of the particles . 13. Vacuum cleaner according to at least one of claims 1 to 12, characterized in that the ejector (7) when the water load (8) is introduced is activated by closing the cover (6) and inserting the suction blower (14). 14.-Vacuum cleaner according to at least one of claims 1 to 13, characterized in that the diffuser (10) and the bulkhead (12) of the droplet separator can be removed to simplify cleaning with gripping parts (24) arranged in the area clean. 15.-Vacuum cleaner according to at least one of claims 1 to 14, characterized in that the water intake area of the riser pipe (9) is arranged in the clean area (8b) of the water load (8) located at downstream of the drop separation bulkhead (12). 16.-Vacuum cleaner according to at least one of claims 1 to 14, characterized in that the connection (15) of the pipes upright on the ejector (7,32,33) is arranged on its side not facing the direction of the flow intake air. 17. Vacuum cleaner according to one of the claims 1 to 16, characterized in that by closing the cover (6) the junction of the upright pipes of the ejector (7) can be hermetically inserted into the free end (16) of the upright pipe ( 9). 18. Vacuum cleaner according to at least one of claims 1 to 17, characterized in that a detector capable of supplying signals representing the quantity of the water load (8) is associated with the tank (2). 19. Vacuum cleaner according to Claim 18, characterized in that the signal is able to switch off the suction air blower (14).