CN111818832A - Wet and dry vacuum cleaners - Google Patents

Abstract

The invention relates to a wet and dry vacuum cleaner having a vacuum cleaner head, a dirt container and an inlet fitting designed for connecting a suction hose, wherein the inlet fitting is in flow connection with an inlet connection of the wet and dry vacuum cleaner in the wet and dry vacuum cleaner such that sucked-in dirt particles can enter the dirt container via the inlet connection, wherein the inlet connection is designed as a diffuser flowing horizontally.

Description

Wet and dry vacuum cleaners

technical field

The present invention relates to a wet and dry vacuum cleaner having a cleaner head/dirt container and an access fitting configured for connecting a suction hose. The inlet fitting is in flow connection with an inlet connecting piece of the wet and dry vacuum cleaner located in the wet and dry vacuum cleaner, so that sucked dirt particles can reach the dirt container via the suction connecting piece.

Background technique

Wet and dry vacuum cleaners of the type mentioned at the outset are known in principle from the prior art. These wet and dry vacuum cleaners are used, for example, to pick up dirt particles, which typically occur when working with grinders. For this purpose, a suction hose is connected to the inlet fitting, which in turn is, by way of example, connected to the grinder. In so-called wet applications, dirty water is sucked in. In dry applications, only or mainly dry dirt particles are sucked in.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a wet and dry vacuum cleaner with improved operating characteristics.

This object is achieved by the inlet nozzle being designed as a horizontal outflow diffuser.

The present invention includes the recognition that in prior art wet and dry cleaners, the inlet fitting and/or the inlet nozzle are typically positioned in the cleaner head, whereby the existing volume of the dirt container can be optimally utilized. In this case, the inlet connection is typically directed directly into the dirt container, which leads to undesired lifting and eddying of dirt particles that have been sucked in in the dirt container. It has been observed that this results in premature shutdown in wet applications and relatively short filter life in dry applications. These disadvantages can be avoided by means of the diffuser whose inlet nozzle is designed according to the invention as a horizontal outflow. Rather, the layer-by-layer introduction of dirt particles into the dirt container is facilitated without turbulence in the dirt container.

It has proven to be advantageous if the suction flow is directed towards the inner wall of the dirt container through the inlet connection piece, which is designed as a diffuser. The rebound of the suction flow from the inner wall slows or slows the sucked-in air with dirt particles, which leads to a further improvement in the feeding of the dirt particles into the dirt container.

Preferably, the inner wall of the dirt container is the side wall of the dirt container. The inner wall need not necessarily be the side wall of the dirt container. Rather, the inner wall can also be another wall inside the wet and dry cleaner which is oriented vertically and/or whose area is at least as large as the cross-section of the diffuser opening into the nozzle.

In a particularly preferred configuration, the inlet socket, which is designed as a diffuser, has a diffuser opening, the wall distance of which is less than one fifth of the container width of the dirt container from the inner wall.

The cross-section of the diffuser opening is preferably at least 50% larger than the cross-section of the inlet fitting in the region of the wall channel leading into the dirt container.

The diffuser opening (preferably only) may be provided in the upper third of the dirt container.

It has proven to be advantageous if the inlet connection piece, which is designed as a diffuser, is arranged in the volume defined by the dirt container. Particularly preferably, the inlet nipple, which is designed as a diffuser, is arranged only in the volume delimited by the dirt container.

Particularly preferably, the wet and dry vacuum cleaner has an electric turbine arranged in the cleaner head. The wet and dry vacuum cleaner can have a dirt filter, which is connected downstream of the inlet nozzle configured as a diffuser with respect to the suction flow.

In a further preferred configuration, the inlet connection piece, which is designed as a diffuser, is designed in one piece. The inlet nipple, which is designed as a diffuser, can be integrally formed on the dirt container. The inlet nipple, which is designed as a diffuser, preferably consists of plastic or a polymer.

Description of drawings

Additional advantages emerge from the following description of the figures. A preferred embodiment of the present invention is shown in FIG. 1 . The drawings, the description and the claims contain numerous features in combination. Those skilled in the art expediently also consider these features individually and combine them into meaningful other combinations.

Detailed ways

A preferred embodiment of a wet and dry vacuum cleaner 100 according to the present invention is shown in FIG. 1 . The wet and dry vacuum cleaner 100 has a cleaner head 10 , a dirt container 20 and an inlet fitting 25 which is configured for connecting a suction hose 200 .

The suction hose 200 to be connected to the access fitting 25 is shown schematically in FIG. 1 .

The wet and dry vacuum cleaner 100 also has an inlet nipple 27 which is in flow connection with the inlet fitting 25 in such a way that the sucked-in dirt particles P can reach the dirt container 20 via the inlet nipple 27 .

As can be seen from FIG. 1 , the inlet connection 27 is designed according to the invention as a horizontal outflow diffuser.

As can be seen from the figures, the inlet nipple 27 designed as a diffuser is arranged only in the volume V defined by the dirt container 20 . Furthermore, a diffuser is provided which is designed to enter the nipple 27 so that the suction flow S is directed directly towards the inner wall 21 of the dirt container 20 . In other words, the suction flow S flows in the horizontal direction H towards the inner wall 21 through the diffuser opening 28 of the inlet nipple 27 , bounces off the inner wall and enters the lower region of the dirt container 20 at a slower rate, whereby dirt particles are P can be introduced layer by layer without eddy currents or at least with significantly reduced eddy currents.

As can also be seen from FIG. 1 , the diffuser opening 28 of the inlet nipple 27 has a wall distance WA relative to the inner wall 21 , wherein the wall distance WA is less than one fifth of the container width B of the dirt container 20 .

In the present embodiment, the cross-section Q1 of the diffuser opening 28 is at least 50% larger than the cross-section Q2 of the inlet fitting 25 in the region of the wall channel leading into the dirt container 20 .

The wet and dry cleaner 100 of FIG. 1 also has an electric turbine provided in the cleaner head 10 . By means of the electric turbine, a suction flow S is generated, via which dirt particles P are drawn into the dirt container 20 during wet or dry application.

The wet and dry vacuum cleaner 100 also has a dirt filter 17 which is connected with respect to the suction flow S downstream of the inlet connection piece 27 designed as a diffuser. In the presently shown embodiment, the dirt filter 17 is arranged in the transition between the cleaner head 10 and the dirt container 20 .

The cleaner head 10 is placed on the dirt container 20 from above and locked onto the dirt container (locking means not shown). In the preferred embodiment of FIG. 1 , the inlet nipple 27 designed as a diffuser is designed in one piece and is directly integrally formed on the dirt container 20 . In this case, both the inlet socket 27 and the dirt container 20 consist of plastic.

In an alternative embodiment, the dirt container 20 can be produced, for example, from metal, into which an inlet stub, eg, a plastic or a polymer, is fitted together with an inlet fitting 25, which is composed of a plastic or a polymer.

List of reference signs

10 Vacuum cleaner heads

15 Electric Turbines

17 Dirt filter

20 Dirt container

21 inner wall

25 Access to accessories

27 Enter Takeover

28 Diffuser opening

100 Wet and Dry Vacuums

200 suction hose

B container width

H level

P Dirt particles

Q1 Cross section of diffuser opening

Q2 Cross section into the fitting

S suction flow

V Dirt container volume

WA wall spacing

Claims (10)

1. A wet and dry vacuum cleaner (100) having a cleaner head (10), a dirt container (20) and an access fitting (25) configured for connecting a suction hose (200), wherein, The inlet fitting (25) is in flow connection with an inlet nozzle (27) of the wet and dry vacuum cleaner (100) located in the wet and dry vacuum cleaner (100), so that inhaled dirt particles (P) can pass through the wet and dry vacuum cleaner (100). The inlet connection ( 27 ) leads into the dirt container ( 20 ), characterized in that the inlet connection ( 27 ) is designed as a diffuser with a horizontal outflow. 2 . The wet and dry vacuum cleaner ( 100 ) according to claim 1 , characterized in that the suction flow ( S ) passes through the inlet nozzle ( 27 ) configured as a diffuser to the end of the dirt container ( 20 ). 3 . The inner wall (21) points. 3. The wet and dry vacuum cleaner (100) according to claim 2, wherein the inner wall (21) of the dirt container (20) is a side wall of the dirt container (20). 4. The wet and dry vacuum cleaner (100) according to claim 2 or 3, characterized in that the inlet nipple (27) configured as a diffuser has a diffuser opening (28) which is connected to the The wall spacing (WA) of the inner wall (21) is less than one fifth of the container width (B) of the dirt container (20). 5. The wet and dry vacuum cleaner (100) according to any one of the preceding claims, wherein the diffuser opening (28) has a larger cross-section (Q1) than the inlet fitting (25) The cross section (Q2) in the region of the wall channel in the dirt container (20) is at least 50% larger. 6 . The wet and dry vacuum cleaner ( 100 ) according to claim 1 , wherein the inlet nozzle ( 27 ) configured as a diffuser is preferably arranged only in the area bounded by the dirt container ( 20 ). 7 . in the volume (V). 7. The wet and dry vacuum cleaner (100) according to any one of the preceding claims, characterized in that the wet and dry vacuum cleaner (100) has an electric turbine (15) arranged in the cleaner head (10). 8. The wet and dry vacuum cleaner (100) according to any one of the preceding claims, characterized in that the wet and dry vacuum cleaner (100) has a dirt filter (17) which is relative to the Said suction flow (S) is connected downstream of said inlet nozzle (27) configured as a diffuser. 9 . The wet and dry vacuum cleaner ( 100 ) according to claim 1 , wherein the inlet nipple ( 27 ) configured as a diffuser is constructed in one piece and/or is integrally formed in the dirt on the container (20). 10 . The wet and dry vacuum cleaner ( 100 ) according to claim 1 , wherein the inlet nozzle ( 27 ) configured as a diffuser consists of plastic. 11 .

Images