CN111818833B

CN111818833B - Dry and wet dust collector

Info

Publication number: CN111818833B
Application number: CN201980017783.5A
Authority: CN
Inventors: X·汉斯梅尔; S·米勒; M·根克; W·里希特; S·赫斯
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2018-03-22
Filing date: 2019-03-21
Publication date: 2022-07-29
Anticipated expiration: 2039-03-21
Also published as: WO2019180108A1; EP3768138A1; WO2019180109A1; JP2021517042A; CN111818833A; EP3768137A1; EP3768138B1; CN111818832A; JP7064815B2; US20210106193A1; JP2021517041A; US20210113042A1; EP3542693A1

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. Furthermore, the inlet connection of the wet and dry vacuum cleaner can have a Y-shape in a manner such that the inlet connection comprises an inflow opening for the suction flow and two outflow openings.

Description

Dry and wet dust collector

Technical Field

The invention relates to a wet and dry vacuum cleaner having a cleaner head/dirt container and an inlet fitting designed for connecting a suction hose. 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, so that the sucked-in dirt particles can pass through the inlet connection into the dirt container.

Background

Wet and dry cleaners of the type mentioned at the outset are known in principle from the prior art. These wet and dry cleaners are used, for example, to suck away dirt particles which typically occur, for example, when working with an abrasive cutting machine. For this purpose, a suction hose is connected to the inlet fitting, which suction hose is in turn connected, by way of example, to a milling machine. In so-called wet applications, dirty water is sucked in. In dry applications, only or primarily dry dirt particles are sucked in. The mixture of dust and water or air drawn in is typically collected in a dirt container until the dirt container is emptied.

Disclosure of Invention

It is an object of the present invention to provide a wet and dry vacuum cleaner having improved operating characteristics. Furthermore, the existing volume of the dirt container is optimally utilized in the wet and dry vacuum cleaner to be provided, so that the amount of dust or water contained can be maximized.

This object is achieved by the diffuser having the intake nipple designed as a horizontal outflow. The invention relates in particular to an intake nozzle for a wet and dry vacuum cleaner, wherein the intake nozzle is arranged in the wet and dry vacuum cleaner in such a way that a suction flow flows substantially horizontally into a dirt container of the vacuum cleaner. The substantially horizontal inflow direction of the fluid-particle mixture of the suction flow preferably extends substantially parallel to the floor of the dirt container, preferably also substantially parallel to the floor on which the wet and dry vacuum cleaner is placed.

The present invention includes the following recognition: in prior art wet and dry cleaners, the inlet fitting and/or the inlet nipple are typically positioned in the cleaner head, whereby the existing volume of the dirt container can be optimally utilized. In this case, the intake nipple is typically directed directly into the dirt container, which leads to an undesired lifting and swirling of the already sucked-in dirt particles in the dirt container. It has been observed that: this results in premature shut-down in wet applications and relatively short filter life in dry applications. These disadvantages can be avoided by the way the inlet connection is designed according to the invention as a diffuser with a horizontal outflow. Rather, the layer-by-layer introduction of dirt particles into the dirt container is promoted without turbulence in the dirt container. The substantially stratified filling by the dirt container thus realized can advantageously be: the volume available in the dirt container is utilized more efficiently than in conventional wet and dry vacuum cleaners known from the prior art. The horizontally oriented entry nozzle represents a departure from the prior art in particular, since experts so far believe: an optimum utilization of the available volume in the dirt container can be achieved by an oblique arrangement of the inlet socket, wherein the inlet socket is directed into the volume of the dirt container or is arranged such that dirt is guided into the dirt container in the downward spatial direction. Within the meaning of the present invention, the spatial direction "downwards" preferably means: the dirt is guided in the direction of the underside or underside of the dirt container.

It has proven advantageous: the suction flow is directed through the intake connection designed as a diffuser toward the inner wall of the dirt container. The rebound of the suction flow from the inner wall slows down or slows down the sucked-in air with the dirt particles, which leads to a further improvement of the introduction of the dirt particles into the dirt container.

Preferably, the inner wall of the dirt container is a side wall of the dirt container. The inner wall need not necessarily be a side wall of the dirt container. Rather, the inner wall can also be a further wall inside the wet and dry vacuum 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 embodiment, the inlet socket designed as a diffuser has a diffuser opening, the wall spacing of which from the inner wall is less than one fifth of the container width of the dirt container.

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

The diffuser opening may (preferably only) be arranged in the upper third of the dirt container. In the case of a smaller dirt container, the diffuser opening can preferably be located in the upper half of the container.

It has proven advantageous: the inlet socket, which is designed as a diffuser, is arranged in the volume defined by the dirt container. In a particularly preferred manner, the inlet socket embodied as a diffuser is arranged exclusively in the volume defined by the dirt container.

It is particularly preferred that the wet and dry vacuum cleaner has an electric turbine provided in the cleaner head. The wet and dry vacuum cleaner can have a dirt filter which is connected downstream of the intake connection in the form of a diffuser with respect to the suction flow.

In a further preferred embodiment, the inlet stub designed as a diffuser is designed in one piece. The inlet socket designed as a diffuser can be integrally formed on the dirt container. The intake nipple designed as a diffuser is preferably made of plastic or polymer.

In a further aspect, the invention relates to a Y-shaped intake nipple. Preferred in this aspect of the invention are: the intake nipple has an end section in the region of the diffuser opening, wherein the end section has one inflow opening for the suction flow and an outflow region comprising two outflow openings. The two outflow openings into the outflow region of the end section of the connection piece can significantly reduce the speed at which the suction flow is sucked into the dirt container. The suction flow preferably consists of a fluid-particle mixture, wherein the fluid can be, for example, a gas or a gas mixture, for example air. The fluid may also be a liquid, such as water. The particles are preferably dust and sucked dirt. The stabilization of the suction flow into the end section of the connection piece is advantageously achieved by reducing the inflow speed of the fluid-particle mixture, which contributes to an improved filling of the dirt container. In other words, the Y-shaped configuration of the inlet socket with two outflow openings results in: the flow in the fluid-particle mixture is stabilized in such a way that a layer-by-layer deposition of the particles in the dirt container is possible. The inventors have realized that: such a layer-by-layer or layered deposition of dust or dirt advantageously leads to an optimum utilization of the available volume in the dirt container.

The inflow opening of the end section preferably forms the transition between the inlet socket and the end section. Preferred within the meaning of the invention are: the suction flow enters the end section in the region of the inflow opening, wherein the flow is initially directed by the design of the end section to the rear wall and/or to the base and/or to the underside of the end section. The direction of entry of the suction flow into the end section is determined in particular by the arrangement of the inflow opening inside the end section.

Preferred within the meaning of the invention are: the inflow opening is formed obliquely to the substantially flat surface of the end section. The suction flow is thereby sucked in particular into the transition region between the rear wall and the base of the end section, where a deceleration of the flow takes place by sudden braking of the fluid-particle mixture. Particularly preferred within the meaning of the invention may be: the rear wall or the base of the end section serves as an inner wall inside the dirt container, wherein the inner wall or the rear wall and/or the wall region of the end section is provided for braking the suction flow when it is directed onto the inner wall, the rear wall and/or the wall region of the end section. In this case, the fluid-particle mixture bounces off the wall, so that the velocity of the flow is significantly reduced.

The end section of the intake nipple can preferably be referred to as an inflow device, which serves to distribute and/or enlarge the suction flow or the fluid-particle mixture. The proposed end section forms in particular a Y-shaped inflow distributor. By means of the preferred embodiment of the end section with one inflow opening and two outflow openings, the outflow volume can advantageously be increased considerably in comparison with the inflow volume. This results as a particular advantage of the invention in that the flow velocity at the outflow opening is smaller than in the region of the inflow opening, so that improved sedimentation properties of the fluid-particle mixture can advantageously be achieved by the preferred configuration of the inlet stub.

In connection with the inclined configuration of the inflow opening, a surface normal lying perpendicularly on the substantially flat surface of the end section can be defined. A further surface normal is preferably defined within the meaning of the invention, which lies perpendicularly on the plane defined by the inflow opening. The normals of the two surfaces thus defined preferably enclose an angle which is preferably referred to within the meaning of the invention as "angle of inclination of the inflow opening". This angle of inclination of the inflow opening may preferably lie in the range between 5 and 30 degrees, preferably between 10 and 20 degrees and particularly preferably at 15 degrees.

Tests have shown that: in addition to the substantially horizontal inflow of the suction flow into the dirt container, the reduction in the speed of the suction flow also has an important role in the manner and method of how the fluid-particle mixture is deposited in the dirt container. In this connection, the Y-shaped configuration of the inlet socket with the preferably inclined inflow opening makes a great contribution, i.e. the volume available in the dirt container can be better utilized or the fluid-particle mixture can be deposited in the dirt container in a particularly space-saving manner.

Preferred within the meaning of the invention are: the outflow openings each comprise a wall region, wherein the wall regions of the outflow openings are formed substantially parallel to the substantially flat surface of the end section of the inlet socket. The wall region of the outflow opening preferably forms an outer closure of the end section of the inlet socket. The wall region preferably serves to guide the sucked-in dirt to the wall region, so that the suction flow loses speed and in particular decelerates due to rebounding. The inventors have realized that: the deceleration of the suction flow or of the sucked-in dirt is a main factor for improved filling and optimum utilization of the volume of the dirt container.

Due to the inclination of the inflow opening, the suction flow or the suctioned dirt is advantageously guided onto the transition region between the rear wall and the wall region of the end section of the intake nipple, so that the suction flow or the suctioned dirt can be braked particularly effectively. The deflection of the suction flow takes place in particular by the design of the end section of the intake nipple. The rear wall of the end section of the inlet nipple is preferably arranged substantially perpendicularly to the substantially flat surface of the end section. Furthermore, the rear wall is arranged substantially perpendicularly to the wall region of the outflow opening, which wall region preferably forms the bottom or bottom side of the end section.

Also preferred within the meaning of the invention are: the outflow opening defines an outflow plane which extends substantially parallel to the rear wall of the end section of the inlet socket and which is configured substantially perpendicular to the wall region of the outflow opening. By arranging the inflow opening inside the end section of the intake socket relative to the outflow opening, the suction flow is advantageously deflected such that the suctioned dirt is deposited in a laminar layer of the dirt container.

The proposed end piece for the inlet nipple can also be used advantageously in combination with a filter bag. For this reason, it may be preferred within the meaning of the invention that: the Y-shaped inlet socket or its end piece has an enlarged connection geometry compared to conventional sockets. The sealing geometry can preferably be configured, for example, in the shape of an ellipse, for example, in the shape of an oval.

Within the meaning of the present invention, preference is also given to: the end section of the inlet socket has only one outflow opening, which however preferably has an outflow opening size which is significantly larger than the inflow opening area. Thereby, an inflow distribution of the suction flow is advantageously achieved, which enables an improved filling of the collecting container.

In particular, the preferably Y-shaped end section of the intake nipple can deflect the inflow direction of the suction flow. In other words, it is preferred within the meaning of the invention that: the end section of the intake nipple is configured by its shape to deflect the direction of the suction flow. In particular, it is preferred within the meaning of the invention that the deflection is substantially 90 degrees in the direction of the end face of the dirt container. Preferred within the meaning of the invention are: the direction of the suction flow preferably extends substantially parallel to the bottom of the container.

Further advantages of the proposed end section for the inlet connection are a reduction in speed and a stabilization of the flow in the dirt container.

In another embodiment of the invention it is preferred that: the inflow opening of the end section is arranged above the maximum filling height of the dirt container. In other words, it is preferred within the meaning of the invention that: the end connection pipe is arranged above the sewage surface or the water surface. This is preferred because layer-by-layer deposition of dirt in the dirt container is possible in particular when the nozzle is not immersed in the incoming dirt. The immersion of the dirt disadvantageously leads to undesired turbulence in the dirt and should be avoided.

In a very particularly preferred embodiment of the invention, a wet and dry vacuum cleaner is disclosed, which has an intake nipple which is designed as a diffuser with a horizontal outflow and has a Y-shape in such a way that it comprises an inflow opening for the suction flow and two outflow openings. In particular wet and dry cleaners have a dirt container, wherein the sucked-in dirt particles can pass into the dirt container via an inlet connection. It is preferable that: the inlet socket has an end section in the region of the diffuser opening, wherein the end section of the inlet socket has an inflow opening for the suction flow and an outflow region, wherein the outflow region comprises two outflow openings.

Drawings

Other advantages result from the following description of the figures. A preferred embodiment of the present invention is shown in fig. 1 and 2. The figures, description and claims contain many combinations of features. The person skilled in the art suitably also considers these features individually and combines them into other combinations which are meaningful.

Detailed Description

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

A suction hose 200 to be connected to the inlet fitting 25 is schematically shown in fig. 1.

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

As can be seen from fig. 1, the intake connector 27 is designed according to the invention as a diffuser with a horizontal outflow.

As can be seen from the figures, the inlet connection 27, which is designed as a diffuser, is arranged only in the volume V defined by the dirt container 20. Furthermore, a diffuser configured as an inlet nozzle 27 is provided, so that the suction flow S is directed directly toward the inner wall 21 of the dirt container 20. In other words, the suction flow S flows through the diffuser opening 28 of the intake nozzle 27 in the horizontal direction H toward the inner wall 21, rebounds from the inner wall and enters into the lower region of the dirt container 20 in a slowing manner, as a result of which the dirt particles P can be introduced layer by layer without turbulence or at least with a significantly reduced turbulence.

As can also be seen from fig. 1, the diffuser opening 28 entering the connection piece 27 has a wall distance WA from 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 exemplary embodiment, the cross section Q1 of the diffuser opening 28 is at least 50% greater 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 figure 1 also has a motor 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 sucked into the dirt container 20 during wet or dry use.

The wet and dry vacuum cleaner 100 also has a dirt filter 17, which is connected downstream of the intake connection 27, which is designed as a diffuser, with respect to the suction flow S. In the presently illustrated embodiment, a dirt filter 17 is provided 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 thereto (locking means not shown). In the preferred embodiment of fig. 1, the inlet socket 27, which is designed as a diffuser, is designed in one piece and is integrally molded directly onto the dirt container 20. The intake connector 27 and the dirt container 20 are both made of plastic.

In an alternative embodiment, the dirt container 20 can be made of metal, for example, into which an inlet socket made of plastic or polymer, for example, is fitted together with an inlet fitting 25 made of plastic, elastomer or polymer.

Fig. 2 shows a preferred embodiment of the Y-shaped end section 29 of the intake nipple 27 of the wet and dry vacuum cleaner 100. The upper side of the end section 29 is formed by a substantially planar, i.e. flat, surface. In this upper side of the end section 29 there is an inflow opening 30. Through this inflow opening 30, the fluid-particle mixture from the suction hose 200 flows into the dirt container 20 of the wet and dry vacuum cleaner 100. The suction flow S is advantageously deflected when passing through the end section 29 in such a way that the fluid-particle mixture leaves the end section 29 preferably in a direction different from the inflow direction. It is particularly preferred if the flow direction is deflected by the end section 29 in the direction of the end face of the dirt container 20, for example, in the range of 90 degrees.

In the exemplary embodiment of the invention shown in fig. 2, the inflow opening 30 is formed obliquely to the substantially flat upper side of the end section 29. An imaginary, virtual central axis can be provided through the inflow opening 30, which central axis forms an oblique angle with the normal of the substantially flat surface of the end section 29. This angle of inclination preferably indicates how much the inflow opening 30 is inclined with respect to the upper side of the end section 29. The inflow opening 30 preferably has an oval, in particular circular, base surface, the diameter of which may be, for example, between 3cm and 8cm, preferably between 4cm and 7cm and very particularly preferably between 5cm and 6 cm.

The end section 29 also has an outflow region 31 which is formed by two outflow openings 32. Within the meaning of the invention, it is also possible to provide one outflow opening 32 or more than two outflow openings 32, wherein the area of the outflow opening 32 is to be increased in relation to the size of the one inflow opening 30. The outflow opening 32 preferably represents an outflow plane which is configured substantially orthogonally to the substantially flat surface of the end section 29. The outflow plane is preferably substantially parallel to the rear wall of the end section 29 and substantially perpendicular to a wall region 33 of the end section 29, which wall region preferably forms the bottom or lower terminal end of the end section 29.

List of reference numerals

10 head of vacuum cleaner

15 electric turbine

17 dirt filter

20 dirt container

21 inner wall

25 Access fitting

27 entry nipple

28 diffuser opening

29 end section

30 inflow opening

31 outflow region

32 outflow opening

33 wall region

100 dry and wet vacuum cleaner

200 suction hose

Width of B vessel

H level

P dirt particles

Cross section of Q1 diffuser opening

Cross section of Q2 entry fitting

S suction flow

V volume of dirt container

WA wall spacing

Claims

1. A wet and dry vacuum cleaner (100) having a cleaner head (10), a dirt container (20) and an inlet fitting (25) configured for connecting a suction hose (200), wherein the inlet fitting (25) is in flow connection with an inlet nipple (27) of the wet and dry vacuum cleaner (100) located in the wet and dry vacuum cleaner (100) such that sucked-in dirt particles (P) can pass into the dirt container (20) via the inlet nipple (27), characterized in that the inlet nipple (27) is configured as a horizontal outflow diffuser, the inlet nipple (27) having an end section (29) with an inflow opening (30), the inflow opening (30) being configured obliquely with respect to a substantially flat surface of the end section (29), the inlet nipple (27) configured as a diffuser having a diffuser opening (28), the inlet socket (27) has the end section (29) in the region of the diffuser opening (28), the end section (29) has an outflow region (31) comprising two outflow openings (32), each outflow opening (32) comprises a wall region (33), the wall regions (33) of the outflow openings (32) are formed substantially parallel to the substantially planar surface of the end section (29) of the inlet socket (27), and the cross section (Q1) of the diffuser opening (28) is at least 50% greater than the cross section (Q2) of the inlet fitting (25) in the region of the wall channel leading into the dirt container (20).

2. Wet and dry vacuum cleaner (100) according to claim 1, characterized in that the suction flow (S) is directed through the intake nipple (27) configured as a diffuser towards the inner wall (21) of the dirt container (20).

3. 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. A wet and dry vacuum cleaner (100) according to claim 2 or 3, wherein the wall spacing (WA) of the diffuser opening (28) from the inner wall (21) is less than one fifth of the container width (B) of the dirt container (20).

5. A wet and dry vacuum cleaner (100) according to any of claims 1 to 3, characterized in that the intake nipple (27) configured as a diffuser is arranged in a volume (V) defined by the dirt container (20).

6. A wet and dry vacuum cleaner (100) according to any of claims 1 to 3, characterized in that the wet and dry vacuum cleaner (100) has an electric turbine (15) arranged in the cleaner head (10).

7. Wet and dry vacuum cleaner (100) according to claim 2 or 3, characterised in that the wet and dry vacuum cleaner (100) has a dirt filter (17) which is connected downstream of the intake nipple (27) configured as a diffuser with respect to the suction flow (S).

8. The wet and dry vacuum cleaner (100) as claimed in one of claims 1 to 3, characterized in that the inlet socket (27) configured as a diffuser is constructed in one piece and/or the inlet socket (27) configured as a diffuser is integrally formed on the dirt container (20).

9. Wet and dry vacuum cleaner (100) according to one of the claims 1 to 3, characterised in that the intake nipple (27) configured as a diffuser consists of plastic.

10. Wet and dry vacuum cleaner (100) according to claim 2 or 3, characterized in that the inflow opening (30) of the end section (29) is provided for a suction flow (S).

11. Wet and dry vacuum cleaner (100) according to claim 10, characterized in that the end section (29) is configured by its shape for deflecting the direction of the suction flow (S).

12. Dry and wet vacuum cleaner (100) according to any of claims 1 to 3, characterized in that the inflow opening (30) of the end section (29) is arranged above a maximum filling height of the dirt container (20).