EP2534990A2 - Floor nozzle for a vacuum cleaner and vacuum cleaner with such a floor nozzle - Google Patents

Abstract

The floor nozzle (10) has a suction channel (12) that is provided in a travelling direction (16) of the floor nozzle. The suction channel edges (18,20) are provided before and behind immediately adjacent to the suction channel. The suction channel edges are provided with accumulating bevels that are turned away from the suction channel. A gap between the suction channel edges is closed laterally. The height of the suction channel edge is 0.5mu m.

Description

The present invention relates to a floor nozzle for a vacuum cleaner according to the preamble of claim 1, ie a floor nozzle with a suction mouth and at least one outgoing therefrom suction channel, wherein the suction mouth / suction channel is limited by a Saugkanalkante and wherein the Saugkanalkante on a first side of the suction channel and wherein this first side of the suction channel is usually further away from a user using the floor nozzle than one of the first side on the suction side opposite second side, such that during a conventional forward movement of the floor nozzle during suction, this first side and thus the Saugkanalkante before the Suction mouth and the suction channel is located.

Such floor nozzles are known per se. For example, Applicants may be referred to applicant's floor nozzles with the type designations SBD 245, SBD 450, SBD 285, SBD 550 and SBD 265.

In such floor nozzles is caused when passing over a pile carpet with the floor nozzle that includes carpet from the carpet, which are in a forward movement of the floor nozzle in the direction of movement of the floor nozzle, located in front of the suction channel Saugkanalkante (front Saugmund- / Saugkanalkante) something, so that a small gap forms directly behind this edge. Here, suction air, which flows under the front suction channel edge, comes into contact with dust in the pile carpet and entrains it. This process occurs only once for each movement of the floor nozzle for the respective swept area and twice in the case of floor nozzles in one embodiment as so-called two-channel floor nozzles. With regard to the suction air flowing through a suction channel and two-channel bottom nozzles are not quite optimal insofar as the suction air stream is divided between the two suction channels formed there and thus only half the amount of air flows through a respective suction channel associated Saugkanalkante.

An object of the present invention is accordingly to provide a further embodiment of a floor nozzle for a vacuum cleaner, in particular a floor nozzle, which is characterized by an increase in dust collection efficiency and / or a reduction of the resistance to movement and / or an improvement in energy efficiency.

This object is achieved for a floor nozzle of the type mentioned with the features of the independent claim. This is in a floor nozzle for a vacuum cleaner, which has a suction mouth opening and at least one suction channel emanating therefrom, wherein the suction channel is limited by a Saugkanalkante at least in a usual direction of movement of the floor nozzle during operation, provided that the floor nozzle in front of the Saugkanalkante, in the direction of movement of the floor nozzle or Seen from the suction mouth in front of the Saugkanalkante, at least one further Saugkanalkante. Here and below, the common in the prior art and directly adjacent to the or each suction channel Saugkanalkante is referred to as the first Saugkanalkante and to distinguish the seen from the suction from before the first Saugkanalkante provided further Saugkanalkante as the second Saugkanalkante.

An advantage of the invention is that even the further or second Saugkanalkante when driving over, for. a pile carpet with the floor nozzle leads to a bending of the fibers and after sweeping the fibers through the second, further Saugkanalkante to an elastic relaxation of the previously bent fibers, whereby an additional loosening of a compound of dirt or dust particles is achieved with the carpet fibers. These can then be sucked off when passing over with the first suction channel edge and the suction air stream flowing under both suction channel edges.

The approach according to the invention may not be compared or confused with a floor nozzle having a first and second suction mouth and corresponding to two suction channels and a middle suction channel edge formed between both suction channels. In such a floor nozzle is located in front of a (in the direction of movement) front suction and behind a (in the direction of movement) rear suction channel each have a Saugkanalkante (front and rear Saugkanalkante). With the middle suction channel edge, such a floor nozzle thus has three suction channel edges. Considering only the rear suction, is located in front of this first the middle Saugkanalkante and then also located in front of the front suction duct front Saugkanalkante. However, the front suction channel is still located between the middle suction channel edge and the front suction channel edge, whereas in the case of the floor nozzle proposed here, the second edge directly follows the first edge directly adjoining the suction channel. In the proposed embodiment, the same suction air flow is guided over two edges, while in known two-channel floor nozzles, the air flow is divided into the first and second suction air duct and the split air flow is guided only over one edge, namely either the front or the rear edge, and the middle edge is even in a low-flow area where dust transport hardly takes place.

When approach according to the invention, in which immediately before the suction channel, a first and a directly subsequent thereto second Saugkanalkante are, so deletes the entire leading into the suction duct suction air flow over the first and second edge, so that loosened dust or dirt particles are better detected and transported away more completely with the suction air stream.

Embodiments of the invention are the subject of the dependent claims. Here used backlinks indicate the further development of the subject matter of the main claim by the features of the respective subclaim. They may also contain independent inventions having a design independent of the objects of the preceding claims and are not to be understood as a waiver of obtaining independent, objective protection of their characteristics. Furthermore, with a view to an interpretation of the claims in a closer specification of a feature in a subordinate claim, it is to be assumed that such a restriction does not exist in the respective preceding claims.

By virtue of the fact that the first suction channel edge and the or each second, further suction channel edge each have a run-on slope facing away from the suction mouth or the directly adjacent suction channel, there is a reduction in the resistance to movement when using the floor nozzle, e.g. when driving over a pile carpet, in that the ramps cause a continuous bending of the carpet pile fibers and the surfaces of the ramps themselves have a low coefficient of friction, so that there is little friction.

With regard to an inclination of the two bevels, it is considered that they are the same or at least substantially the same.

If a gap remaining between the first suction channel edge and the further second suction channel edge lying directly in front of the first suction channel edge is laterally closed, ie closed in the region of the sides of the floor nozzle located in the extension of the course of the suction channel, it can be ensured the entire suction air flow or at least substantially the entire suction air flow is sucked in via the first and second suction channel edge and does not flow in from the side where it would be of lesser effect with regard to the removal of dirt or dust particles.

By starting from a level defined by a height of the first Saugkanalkante the or each other, further Saugkanalkante is set back, that is a greater distance from the ground level, can be achieved that does not apply to move the floor nozzle on, for example, a pile carpet sliding force at least not noticeably increased. This also causes a reduction in the resistance of the floor nozzle.

Values in the range of 0.3 to 0.8 mm have been found to be favorable values with regard to a greater distance of the further second suction channel edge from the ground level. This ensures that at an average pile height and a normal penetration depth of a floor profile of the floor nozzle with the at least one suction channel formed there and the Saugkanalkanten also the second, further Saugkanalkante the carpet pile still roams.

With regard to a height of the other second Saugkanalkante has been shown that even at a height of the other second Saugkanalkante of 0.5 mm, a corresponding influence on the dust-holding capacity, by an additional loosening of a compound of dirt or dust particles with the carpet fibers, determine. Measurements for the height of the further second suction channel edge in the range of 3 to 10 mm have been found to be particularly favorable and effective, in that it is achieved that carpet pile fibers can erect themselves upright between the edges for a short time. A height of the further second Saugkanalkante in the specified range is particularly suitable for long-pile carpets. With an average pile height, a height of the further second suction channel edge of 5 mm should typically be selected in order to produce this effect.

The previously described embodiment of the floor nozzle proposed here with a first and a further second Saugkanalkante each in the direction of movement in front of the suction channel - including here and described below advantageous embodiments - be supplemented by the fact that behind the Saugluftkanal not only a Saugkanalkante, but each one first and a second, further Saugkanalkante are. The two Saugkanalkanten located in the direction of movement behind the suction channel then act exactly like the previously described two Saugkanalkanten when the floor nozzle is not moved away from the user, but in the direction of the user. The effect of loosening up of dirt particles associated with carpet fibers thus results in the usual forward and backward movements of the floor nozzle per movement process (forward movement and subsequent backward movement) twice. For the same operating time of the vacuum cleaner, so without additional energy consumption in terms of the operation of the vacuum cleaner with electrical energy, so an improved suction can be expected. In addition, the improved suction results without additional effort or at least largely without additional effort for the user. Conversely, due to the improved suction efficiency, a suction result corresponding to a previous suction result can be achieved in a shorter time and with a lower consumption of electrical energy be achieved on the one hand and with a reduced effort for the user on the other hand.

An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.

Fig. 1

eine Bodendüse für einen Staubsauger,

Fig. 2

einen schematisch vereinfachten Ausschnitt aus der Darstellung gemäß Fig. 1,

Fig. 3

die Darstellung gemäß Fig. 2 mit eingezeichneten Höhenniveaus,

Fig. 4, 5

Ansichten unterschiedlicher Ausführungsformen der Bodendüse gemäß Fig. 1 von unten

Fig. 6

mit einem in etwa gleichen Ausschnitt wie bei der Darstellung in Fig. 2 eine schematisch vereinfachte Darstellung einer im Stand der Technik bekannten Bodendüse.

The or each embodiment is not to be understood as limiting the invention. Rather, numerous modifications and variations are possible in the context of the present disclosure, for example by combination or modification of individual in conjunction with the features described in the general description, the or each embodiment and the claims and included in the drawings with respect to those skilled in the art be removed to the solution of the problem and lead by combinable features to a new object or to new process steps or process steps. It shows

Fig. 1

a floor nozzle for a vacuum cleaner,

Fig. 2

a schematically simplified section of the illustration according to Fig. 1 .

Fig. 3

the representation according to Fig. 2 with marked height levels,

Fig. 4, 5

Views of different embodiments of the floor nozzle according to Fig. 1 from underneath

Fig. 6

with a roughly similar section as in the illustration in Fig. 2 a simplified schematic representation of a known in the art floor nozzle.

Fig. 1 shows in a sectional view a side view of a floor nozzle 10. This has a suction channel 12 in a front region. In a rear area, a connecting piece 14 is shown, with which a suction pipe of a vacuum cleaner (not shown) is connected or connectable in the usual manner. An in Fig. 1 Plotted arrow 16 shows insofar a direction for forward movement of the floor nozzle 10. Such a direction is understood in the following as the usual direction of movement. Moving in the direction of arrow 16, the floor nozzle 10 is moved away from a user located behind the floor nozzle 10. Of course, a reverse direction of movement is possible by the user pulls the floor nozzle 10 to approach.

Fig. 2 shows an enlarged section of the illustration according to Fig. 1 in the area of the suction channel 12. For better clarification of terms such as "before" and "behind" (in each case based on the suction channel 12) is also in the illustration in Fig. 2 the usual Direction of movement indicating arrow 16 resumed. In this respect, in front of the suction channel 12, namely in the direction of movement (arrow 16), a first Saugkanalkante 18. The first Saugkanalkante 18 limits as it were the suction channel 12 in the illustrated by the arrow 16 direction of movement. Seen from the suction channel 12, a second, further suction channel edge 20 is located in front of the first suction channel edge 18. Each suction channel edge 18, 20 has a run-on slope 22, 24 (first run-up slope 22, second run-on slope 24) facing away from the suction channel 12.

Shown in the picture in Fig. 2 also a carpet pile 26 with carpet pile fibers included. It can be seen that during a movement of the floor nozzle 10 (FIG. Fig. 1 ) in the direction of the arrow 16, that is to say during a forward movement or during a movement in a "usual" direction of movement, the carpet pile fibers are bent so that an elastic deformation results, which is dissolved again as soon as the respective first or second suction channel edge 18, 20 leaves the area of the respective carpet pile fibers. Due to the bending of the carpet pile fibers possibly adhering dirt is loosened and it forms directly behind the respective Saugkanalkante 18, 20, a small gap in the carpet pile. Here comes under the Saugkanalkante 18, 20 flowing through suction air with the dust in contact and tears it with. A course of a suction air flow 28 along the two suction channel edges 18, 20 is in Fig. 2 shown with a respective end in the suction channel 12 arrow.

Fig. 2 already shows a special embodiment of the floor nozzle 10, in which not only in the direction of movement (arrow 16) in front of the suction channel 12, a first and a second, more Saugkanalkante 18, 20 are provided, but in the same way two Saugkanalkanten 30, 32 also behind the suction channel 12 are provided. With two such Saugkanalkanten 18, 20; 30, 32 before and after the suction channel 12, the advantageous effect of the second, further Saugkanalkante 20, 32 results not only in a forward movement (arrow 16) of the floor nozzle 10, but also in an opposite backward movement.

Fig. 3 essentially shows a repetition of the presentation Fig. 2 , Here, it is shown that, starting from a first suction channel edge 18 (or two suction channel edges 18, 30 directly adjacent to the suction channel 12), the or each second, further suction channel edge 20, 32 is reset, ie has a greater distance from the ground level. This greater distance from ground level is shown in the illustration Fig. 3 marked with "b". Favorable values for the additional distance from the ground level, ie for the dimension "b" are according to the findings of the Applicant values in the range of 0.3 to 0.8 mm. It can be seen further that an inclination of the chamfers 22, 24 of the first and second suction channel edge 18, 20 is the same or at least substantially equal. With regard to the height of the further Saugkanalkante 20, the dimension "a" in the illustration in Fig. 3 located. In the exemplary embodiment, this dimension "a" also represents the run-on slope 24 of the further second suction channel edge 20. Applicant has found that favorable values for dimension "a" are at least 0.5 mm, better in the range from 3 to 10 mm, and preferably 5 mm, so that it can be ensured that the carpet pile fibers 26 ( Fig. 2 ) between the Saugkanalkanten 18, 20 can at least briefly upright again.

The representation in 4 and FIG. 5 shows a schematically simplified view of a floor nozzle 10 (FIG. Fig. 1 ) from underneath. Recognizable in each case the suction channel 12 and located approximately in the middle of the suction channel 12 suction mouth. Before and behind the suction channel 12 are each the first and second Saugkanalkante 18, 20; 30, 32. The suction air stream 28 is illustrated in each case by dashed arrows. At the in Fig. 4 As shown, air can flow in to the sides of the floor nozzle 10. This then does not pass past carpet pile fibers passing through the first and second suction channel edge 18, 20; 30, 32 are elastically deformed and thus contributes only to a small extent to the removal of the Saugkanalkanten 18, 20; 30, 32 dissolved dust particles at. In the embodiment in Fig. 5 is a between the direction of movement in front of the suction channel 12 located Saugkanalkanten 18, 20 and also between the in the direction of movement of the floor nozzle 10 located behind the suction channel 12 Saugkanalkanten 30, 32 remaining space laterally closed (side portion 34), so that the total amount of suction air on the Suction channel edges 18, 20; 30, 32 flows into the suction channel 12 and corresponding to the removal of by the Saugkanalkanten 18, 20; 30, 32 loosened dust is effective.

Fig. 6 shows an embodiment of a bottom profile of a floor nozzle 10, as is known in the art. The illustration is provided essentially only for a better understanding of the differences of the floor nozzle 10 according to the approach according to the invention and its embodiments of the prior art. Even with floor nozzles 10 known in the state of the art, a plurality of suction channel edges 38, 40, 42 can be provided, namely when the floor nozzle 36 is a floor nozzle with two or more suction channels 12. In Fig. 6 the bottom profile of such a floor nozzle 36 with two suction channels 12 is shown. This has three Saugkanalkanten 38, 40, 42. In a direction of movement illustrated again by an arrow 16, the three suction channel edges 38, 40, 42 can be considered as the front suction channel edge 38, the middle suction channel edge 40 and the rear suction channel edge 42. Starting from the adjacent to the rear Saugkanalkante 42 suction channel 12 are located in front of this rear suction channel 12, the middle Saugkanalkante 40 and the front Saugkanalkante 38. So are in front of you such Saugkanal 12 two Saugkanalkanten 38, 40, but - in contrast to the approach according to the invention - not in immediate succession, because in fact between the front and the middle Saugkanalkante 38, 40 nor the front suction channel 12 is located. The also in the representation in Fig. 6 Suction air flow represented by arrows 28 is divided between the two suction channels 12, so that the middle suction channel edge 40 is located in a low-flow region B. Even if the middle Saugkanalkante 40 causes a bending of carpet pile fibers, there is hardly any removal of dust because of the low-flow area B, so that essentially only the front and the rear Saugkanalkante 38, 42 are effective. Here, however, each - in contrast to approach according to the invention - each only one suction channel edge 38, 42 is provided.

The invention is described briefly as follows: A floor nozzle 10 for a vacuum cleaner is disclosed which has a suction mouth opening and at least one suction channel 12 emanating therefrom, wherein the suction channel 12 at least in a usual direction of movement of the floor nozzle 10 in operation by a suction channel edge 18th is limited, which is characterized in that the floor nozzle 10 in front of the Saugkanalkante 18, in the direction of movement of the floor nozzle 12 in front of the Saugkanalkante 18, at least one further Saugkanalkante 20. The floor nozzle 10 can also be referred to as a floor nozzle 10 with double suction mouth edges (double suction channel edges).

LIST OF REFERENCE NUMBERS

10

floor nozzle

12

suction

14

spigot

16

arrow

18

(first) suction channel edge

20

(second) further Saugkanalkante

22

approach ramp

24

approach ramp

26

carpet pile

28

suction air

30

(rear) Saugkanalkanten

32

(rear) further Saugkanalkanten

34

lateral area (the floor nozzle)

36

(known) floor nozzle

38

(front) suction channel edge

40

(middle) suction channel edge

42

(rear) Saugkanalkante

Claims (9)

Floor nozzle (10) for a vacuum cleaner, which has a suction mouth opening and at least one suction channel (12) emanating therefrom, the suction channel (12) being limited in operation by a suction channel edge (18), at least in a usual direction of movement of the floor nozzle (10),
characterized,
that said floor nozzle (10) before the Saugkanalkante (18), in the direction of movement of the floor nozzle (12) before the Saugkanalkante (18), at least one further Saugkanalkante (20). Floor nozzle according to claim 1, wherein the suction channel edge (18) and the or each further Saugkanalkante (20) each have a suction channel (12) facing away from bevel (22, 24). A floor nozzle according to claim 2, wherein an inclination of the run-up slopes (22, 24) of the suction channel edges (18, 20) is equal or at least substantially equal. Floor nozzle according to one of claims 1, 2 or 3, wherein between the Saugkanalkanten (18, 20) remaining space is closed laterally. Floor nozzle according to one of claims 1, 2, 3 or 4, wherein, starting from a defined by a height of the Saugkanalkante (18) floor level, the or each further Saugkanalkante (20) is set back. Floor nozzle according to claim 5, with a comparison with the ground level by 0.3 to 0.8 millimeters recessed further Saugkanalkante (20). Floor nozzle according to one of the preceding claims with a height of the further suction channel edge (20) of at least 0.5 millimeters. Floor nozzle according to one of the preceding claims, with a Saugkanalkante (18, 30) respectively in the direction of movement immediately before and after the suction channel (12) and a further Saugkanalkante (20, 32) respectively in the direction of movement before or after the directly to the suction channel (12 ) adjacent Saugkanalkante (18, 30). Vacuum cleaner with a floor nozzle (10) according to one of the preceding claims.

Images