CN108618711B

CN108618711B - Suction base for a bottom cleaning machine

Info

Publication number: CN108618711B
Application number: CN201810223882.6A
Authority: CN
Inventors: 伊戈尔·霍瓦特; 马库斯·古兹克; 弗兰克·耶森
Original assignee: Hako GmbH
Current assignee: Hako GmbH
Priority date: 2017-03-20
Filing date: 2018-03-19
Publication date: 2021-08-27
Anticipated expiration: 2038-03-19
Also published as: EP3378369A1; KR102550941B1; KR20180106994A; JP2018153637A; JP7384552B2; CN108618711A; DE102017105921A1

Abstract

The invention relates to an absorbent seat for a bottom cleaning machine, having an absorbent seat base with a front wall and a rear wall, between which an aspiration channel is formed, which is delimited by an upper wall extending between the front wall and the rear wall. The front wall and the rear wall extend away from the upper wall, and the rear wall has a support edge extending in a plane for supporting on the bottom surface to be cleaned. The rear wall is curved. The suction mount also has a suction fitting in fluid connection with the suction channel. A deflecting wall is also provided, which is arranged on the side of the front wall facing away from the rear wall. The deflecting wall is straight or, viewed in the direction of its side facing away from the rear wall, is convex, and has a bearing edge, preferably in the plane of the bearing edge of the rear wall. The deflecting walls and the supporting edges form a closed surface. The deflecting wall is also spaced apart from at least one end of the absorber base, so that at least one free region without a support edge is provided at the front wall in the region of the at least one end of the absorber base.

Description

Suction base for a bottom cleaning machine

Technical Field

The invention relates to an absorption block for a floor cleaning machine, having an absorption block base with a first end and a second end, as well as a front wall and a rear wall between which an aspiration channel is formed, which is delimited by an upper wall extending between the front wall and the rear wall, wherein the front wall and the rear wall extend away from the upper wall, and the rear wall has a support edge extending in a plane for supporting on a floor surface to be cleaned, wherein the rear wall is curved such that, viewed in the plane of the support edge, the rear wall extends on one side of a connecting line between the first end and the second end of the absorption block base, the rear wall points in the direction of the side of the rear wall facing away from the front wall, and having an aspiration connection which is in fluid connection with the aspiration channel.

Background

Bottom cleaning machines with an absorbent seat are known in the prior art. Typically, the absorbent pad is used to remove liquid present on the bottom to be cleaned from the bottom. This is usually achieved by means of a negative pressure which is provided by the apparatus provided for it and which is applied to the suction cup. The liquid to be removed then passes through the slit opening into the suction channel within the absorbent cup.

Due to the small cross-section of the slit opening, the flow velocity in this region is very high and can reach values of 130 m/s. Such high flow velocities in the region of the slit opening have the disadvantage that: this flow rate results in a large flow noise when aspirating the liquid. Furthermore, the use of small slit openings leads to locally strongly varying and thus inhomogeneous flow rates within the aspiration channel. As a disadvantageous consequence thereof, there are regions in the suction channel in which the flow velocity is too low to transport the liquid present in these regions to the suction connection by means of the gas flow.

Disclosure of Invention

It is therefore an object of the present invention to obviate the above-mentioned disadvantages of the prior art. In particular, an absorber seat is to be provided which, during operation, generates as little noise as possible and/or causes a uniform flow in the interior.

This object is achieved by: a deflecting wall is provided, which is arranged on the side of the front wall facing away from the rear wall, wherein the deflecting wall is straight or, viewed in the direction of the side of the deflecting wall facing away from the rear wall, is convex and has a support edge extending toward the bottom surface to be cleaned, wherein the deflecting wall is also spaced apart from at least one end of the absorption seat base, such that in the region of the at least one end of the absorption seat base, at least one free region without a support edge is provided at the front wall.

A convex baffle wall can be understood here as a wall whose geometry differs from a line running in a straight line between the two end points of the baffle wall, so that the wall extends only on the side of the line which points away from the rear wall.

Preferably, the support edge of the baffle wall lies in the plane of the support edge of the rear wall, wherein the baffle wall and the support edge form a closed surface. The support edge therefore preferably represents an edge which is located on the base to be cleaned when the suction attachment is arranged on the base. The support edge, in conjunction with the base, closes the suction channel in such a way that liquid can enter the suction channel only in the region of the front wall not covered by the baffle wall. When the suction cup is arranged on the base, the plane of the support edge therefore corresponds substantially to the plane of the base. The closed surfaces of the deflecting walls and of the support edges represent surfaces through which liquid cannot pass during operation. This prevents liquid from entering the suction channel behind the baffle wall through the closed surface, i.e. through the baffle wall.

During operation of the floor cleaning machine with the suction cup according to the invention, the suction cup is moved over the floor to be cleaned in a direction substantially perpendicular to the baffle wall. In this case, the liquid present on the bottom emerges onto a straight or projecting deflecting wall, and the liquid is deflected by this shape of the deflecting wall as a result of the movement of the suction seat to at least one free region at the front wall, which is free of supporting edges, i.e. to the suction channel opening. In this region, liquid can enter the aspiration channel. In the suction channel, the liquid is sucked out by the suction connection loaded with underpressure and can thus be transported, for example via a pipe connection, into the liquid tank of the bottom cleaning machine.

The absorbent article according to the invention has the advantages that: the high flow rates that occur in the prior art are avoided in the region of the small slit openings. As a result, the flow noise is significantly reduced when the liquid is sucked out of the bottom. Furthermore, by using at least one aspiration channel opening in the manner according to the invention, the flow velocity within the aspiration channel is substantially uniform, i.e. areas with too low a flow velocity are avoided, so that liquid is transported efficiently. Thereby, the liquid is reliably transported out at every point within the aspiration channel. Finally, the absorption block according to the invention is distinguished by a simple and robust design which allows cost-effective production and requires only a small amount of maintenance.

In a preferred embodiment of the absorbent cup according to the invention, the aspiration channel has a length extending between the first end and the second end of the base of the absorbent cup. It is possible here to: the aspiration channel is shaped either linearly or curved along its length. It is thus possible to: at least one aspiration channel opening is provided near the first end or the second end of the absorbent cup base, thereby using the absorbent cup over the entire length of the aspiration channel.

In a further preferred embodiment of the suction attachment according to the invention, the suction channel has a height which is constant over the length of the suction channel or which increases with decreasing distance from the suction attachment. A constant height of the aspiration channel can be understood as a height which does not substantially change between the first end and the aspiration connection and/or the second end and the aspiration connection. This therefore means in particular: the height of the aspiration channel does not increase from the aspiration fitting to the first end and/or the second end. Alternatively, the height of the aspiration channel can increase from the first end and/or the second end in a direction towards the aspiration connection. The constant height of the aspiration channel has the advantage that: a uniform flow rate and thus a reliable transport of the cleaning liquid is achieved.

In a further preferred embodiment of the absorption block according to the invention, the baffle wall is convexly curved with respect to a connecting line between the first end and the second end of the base of the absorption block. The convex design of the deflecting wall comprises a deflecting wall which is arched outward away from the base of the absorption bed, i.e. the deflecting wall is arched in a direction perpendicular to the side of the front wall facing away from the base of the absorption bed which faces away from the rear wall. This shape has the advantages of: this shape effectively guides the liquid in front of the baffle wall to the end of the baffle wall and thus to the at least one aspiration channel opening.

In a further preferred embodiment of the suction mount according to the invention, the baffle wall is spaced apart from the two ends of the mount base, so that in the region of the first end and the second end of the mount base, two free regions without bearing edges are provided at the front wall, i.e. two suction channel openings are provided. For example, the baffle wall can be disposed in the middle between the first end and the second end of the absorber base. The use of two aspiration through openings has the advantage over the use of only one aspiration channel opening: in the same time, more liquid can enter the aspiration channel and thus be aspirated. Thereby significantly improving the suction efficiency of the suction socket.

In a further preferred embodiment of the suction attachment according to the invention, the suction attachment is arranged in the upper wall of the suction channel, wherein the suction channel has a first height in the region of the suction attachment and a second height in the region surrounding the suction attachment, wherein the first height is smaller than the second height, and wherein the height of the suction channel changes continuously in a transition from the first height to the second height in a transition region adjacent to the suction attachment. Such a local constriction of the aspiration channel has the advantage that: the pollutant absorption is improved by better flow guidance in this region.

Drawings

The invention is described below with reference to the accompanying drawings, which show only preferred embodiments, and in which,

figure 1 shows a side view of a bottom cleaning machine with one embodiment of an absorbent foot according to the invention,

figure 2 shows a perspective view of the first embodiment,

figure 3 shows a plan view of the underside of the first embodiment,

FIG. 4 shows a cross-sectional view through an aspiration channel and an aspiration fitting of another embodiment, an

Fig. 5 shows a perspective cross-sectional view through another embodiment.

Detailed Description

Fig. 1 shows a floor cleaning machine 1 with a front end 3 and a rear end 5 as seen in the direction of travel B. The bottom cleaning machine 1 has a machine frame 7 at which a running gear with front wheels 9 and rear wheels 11 is provided to enable the bottom cleaning machine 1 to run over the bottom to be cleaned. Furthermore, the bottom cleaning machine 1 has at its front end 3a brush head 13 with brush elements. The brush head 13 is designed to apply liquid to the bottom to be cleaned and to brush the bottom with the brush elements present at the brush head 13. The bottom cleaning machine 1 has an embodiment of an absorption seat 15 according to the invention at its rear end 5. The absorption seat 15 is designed to: liquid present on the bottom is sucked in and transported via a pipe 17 into a liquid tank (not shown) of the bottom cleaning machine 1.

Fig. 2 shows a perspective view of one embodiment of the absorption seat 15 according to the invention of fig. 1. The absorber 15 has an absorber base 19 having a first end 21 and a second end 23. The absorbent seat base 19 also has a front wall 25 and a rear wall 27. The rear wall 27 in turn has a bearing edge 29. The support edge 29 is provided here for supporting on the floor to be cleaned. The rear wall 27 of the absorber 15 is curved such that, viewed in the plane of the support edge 29, the rear wall 27 extends on the side of the connecting line V between the first end 21 and the second end 23, which rear wall points in the direction of the side of the rear wall 27 facing away from the front wall 25. Furthermore, an aspiration connection 31 is provided at an upper wall 33 of the absorption seat 15. The suction connection 31 is in fluid connection with a suction channel in the interior of the suction socket 15.

Furthermore, a baffle wall 35 is provided, which is arranged on the side of the front wall 25 facing away from the rear wall 27. The deflecting wall 35 has a curved shape in this exemplary embodiment and also has a support edge 37. However, it is also possible to consider: the baffle wall 35 extends straight between its two ends. A curved baffle wall 35 can be understood as a wall whose geometry differs from a wall which extends in a straight line between two points, wherein the wall extends only on one side of the connection between the two points. In the exemplary embodiment described here, the support edges 29, 37 are edges which lie on the base to be cleaned when the suction attachment 15 is arranged on the base. The support edges 29, 37, in conjunction with the base, close the aspiration channel, so that liquid can enter the aspiration channel only in the region of the front wall 25 not covered by the baffle wall 35, i.e. in the region of the aspiration channel opening. When the suction cup 15 is placed on the base, the plane of the support edges 29, 37 therefore corresponds substantially to the plane of the base. The baffle wall 35 and its support edge 37 form a closed surface, i.e. a surface without openings, through which liquid cannot pass. This prevents liquid from entering the suction channel behind the baffle wall through the closed surface, i.e. through the baffle wall 35.

However, here too: the support edge 37 has, for example, a wavy curve and is not placed over its entire length on the floor to be cleaned. The effect according to the invention can also be achieved with this embodiment if the shape of the support edge is such that the support edge 37 always contacts the cleaning liquid when it is applied to the bottom to be cleaned.

The baffle wall 35 is spaced apart from the first end 21 and the second end 23 in order to provide two free areas, namely two suction channel openings 39, which are not covered by the support edges 29, 37. However, it is also possible to consider: only one suction channel opening 39 is provided, which is arranged spaced apart from the first end 21 or the second end 23. However, it is also possible to consider: the suction socket 15 has more than two suction channel openings 39.

The absorption seat 15 according to the invention has the advantages that: the high flow rates that occur in the prior art are avoided in the region of the small slit openings. As a result, the flow noise is significantly reduced when the liquid is sucked out of the bottom. Furthermore, by using two aspiration channel openings 39 in the manner according to the invention, the flow velocity within the aspiration channel is substantially uniform, i.e. areas with too low a flow velocity are avoided, so that liquid is transported efficiently. Thereby, the liquid is reliably transported out at every point within the aspiration channel. Finally, the suction foot 15 according to the invention is characterized by a simple and robust construction which allows cost-effective production and requires only a small amount of maintenance.

Fig. 3 shows a plan view of the underside of an embodiment of an absorption seat 15 according to the invention. The suction seat 15 has a suction channel 41 formed by the front wall 25, the rear wall 27 and the upper wall 33. Aspiration channel 41 has a length that extends between first end 21 and second end 23 of absorbent seat base 19. However, it is also possible to consider: the length of the aspiration channel 41 extends only over a partial area of the path between the first end 21 and the second end 23 of the absorbent seat base 19. It is possible here to: the aspiration channel is shaped either linearly or curved along its length.

The aspiration channel 41 also has a constant height over the length of the aspiration channel 41. The constant height of the suction channel 41 can be understood as a height which does not substantially change between the first end 21 and the suction connection 31 and/or the second end 33 and the suction connection 31. This therefore means in particular: the height of the aspiration channel 41 does not increase from the aspiration fitting 31 to the first end 21 and/or the second end 23. Alternatively, it is also possible to consider: the height of the aspiration channel 41 increases over the length of the aspiration channel 41 as the distance to the aspiration connection 31 decreases. The constant height of the aspiration channel has the advantage that: a uniform flow is formed in the channel.

In the preferred embodiment described here, the baffle wall 35 has a convexly curved shape, i.e. the baffle wall 35 is curved in the direction B with respect to the connecting line V between the first end 21 and the second end 23 of the absorber base 19. In other words, the convex design of the deflecting wall 35 represents a deflecting wall 35 which is arched outward away from the absorption seat base 19, i.e. in a direction perpendicular to the side of the front wall 25 of the absorption seat base 19 facing away from the rear wall 27. The convex shape of the baffle wall 35 has the advantage that: this shape is particularly effective in guiding the liquid in front of the baffle wall 35 to the end of the baffle wall 35 and thus to the at least one aspiration channel opening 39.

The working of the absorber 15 now proceeds as follows. In use, the suction foot 15 is moved in a direction B, for example perpendicular to the connecting line V, over the bottom to be cleaned. Any other direction of movement perpendicular to the baffle wall 35 is also conceivable. During the movement of the suction cup 15, the liquid present at the bottom emerges onto the deflecting wall 35, and the liquid is deflected by the curved shape of the deflecting wall 35 as a result of the movement of the suction cup 15 to the free region at the front wall 25, which is free of the support edges 29, 37, i.e. to the suction channel opening 39. The direction of movement of the liquid is schematically indicated by

arrows

43a, 43 b. In the region of the aspiration channel opening 39, liquid can enter the aspiration channel 41, see arrow 43 c. In the aspiration channel 41, the liquid is aspirated and aspirated by the aspiration connector 31 loaded with negative pressure (see

arrows

43d, 43 e). Subsequently, the liquid can be transported, for example, via a pipe 17 into a liquid tank.

Fig. 4 and 5 show a sectional view through an aspiration connection 31 and an aspiration channel 41 of a further embodiment of an absorbent pad 15 according to the invention. The suction foot 15 is arranged on the bottom face 45 to be cleaned. The suction connection 31 is arranged in the upper wall 33 of the suction channel 41. The suction channel 41 has a first height H in the region of the suction connection 31₁And a second height H in the region around the suction connection 31₂. Here, the first height H₁Is less than the second height H₂. Furthermore, the height of the suction channel 41 is set from the first height H in a transition region 47 adjacent to the suction connection 31₁To a second height H₂Continuously changing. However, it is also possible to consider: the high degree of transition is formed abruptly. Such a local constriction in the transition region 47 of the aspiration channel 41 has the advantage that: the pollutant absorption is improved by better flow guidance in this region.

Claims

1. An absorbent receptacle for a bottom cleaning machine, the absorbent receptacle having:

an absorbent seat base (19) having a first end (21) and a second end (23), and a front wall (25) and a rear wall (27) between which an aspiration channel (41) is formed, said aspiration channel being delimited by an upper wall (33) extending between the front wall (25) and the rear wall (27),

wherein the front wall (25) and the rear wall (27) extend away from the upper wall (33), and the rear wall (27) has a first support edge (29) extending in a plane for supporting on a floor surface (45) to be cleaned,

wherein the rear wall (27) is curved such that, viewed in the plane of the first supporting edge (29), the rear wall (27) extends on the side of a connecting line between the first end (21) and the second end (23) of the absorption base (19), the rear wall pointing in the direction of the side of the rear wall (27) facing away from the front wall (25);

an aspiration connection (31) in fluid connection with the aspiration channel (41),

it is characterized in that the preparation method is characterized in that,

a deflecting wall (35) is provided, which is arranged on the side of the front wall (25) facing away from the rear wall (27),

the baffle wall (35) is straight or convex when viewed in a direction pointing to the side of the baffle wall facing away from the rear wall, and has a second support edge (37) extending toward the bottom surface to be cleaned, and

the baffle wall (35) is also spaced apart from at least one of the first end (21) and the second end (23) of the absorber base (19) in such a way that in the region of at least one of the first end (21) and the second end (23) of the absorber base (19) at the front wall (25) at least one free region is provided which is free of the first support edge (29).

2. The suction foot for a floor cleaning machine according to claim 1, characterized in that the second bearing edge (37) of the deflection wall (35) lies in the plane of the first bearing edge (29) of the rear wall (27), wherein the deflection wall (35) and the second bearing edge (37) form a closed face.

3. Suction foot for a bottom cleaning machine according to claim 1 or 2, characterized in that the suction channel (41) has a length extending between the first end (21) and the second end (23) of the suction foot base (19).

4. Suction foot for a bottom cleaning machine according to claim 1, characterized in that said aspiration channel (41) has a height that is constant over the length of the aspiration channel (41) or increases with decreasing distance to the aspiration joint (31).

5. Suction seat for a bottom cleaning machine according to claim 1, characterized in that said baffle wall (35) is convexly curved with respect to a connection line between said first end (21) and said second end (23) of said seat base (19).

6. The suction foot for a floor cleaning machine according to claim 1, characterized in that the baffle wall (35) is spaced apart from both ends of the foot base (19) so that in the region of the first end (21) and the second end (23) of the foot base (19) there are provided two free regions at the front wall (25) which are free of the first bearing edge (29).

7. Suction foot for a bottom cleaning machine according to claim 1, characterized in that the suction joint (31) is provided in the upper wall (33) of the suction channel (41), wherein the suction channel (41) has a first height in the area of the suction joint (31) and a second height in the area surrounding the suction joint (31), wherein the first height is smaller than the second height, and wherein the height of the suction channel (41) changes continuously in the transition from the first height to the second height in a transition area (47) adjacent to the suction joint (31).