EP3763271B1 - Nozzle for a suction device for cleaning and care of surfaces - Google Patents

Description

The invention relates to a floor nozzle for a suction device, in particular for a vacuum cleaner, for cleaning and/or maintaining floor surfaces.

Known floor nozzles for suction devices or vacuum cleaners have the problem that the pushing forces are related to the pick-up of dirt. If the suction power is increased in order to better pick up the dirt, the pushing forces of the floor nozzle are increased at the same time. This leads to too much work force, as the floor nozzle sucks itself onto a floor or floor surface with great force.

In order to prevent this firm suction of the floor nozzle, there are various ways of supplying so-called false air to the floor nozzle or a suction device or a vacuum cleaner in order to reduce the suction power and at the same time the pushing forces on the floor nozzle.

The disadvantage of the solutions known from the state of the art is that false air is usually fed in behind the so-called suction mouth of the floor nozzle, for example at the so-called elbow of the vacuum cleaner tube. This reduces the cleaning result, since in this arrangement the suction energy is destroyed by false air.

Furthermore, the GB 958,445 an "Improvement in or relating to Suction Cleaner Nozzles" or a suction cleaner nozzle. The suction cleaner nozzle has a comb on the underside of the nozzle, with an air inlet in the upper part of the nozzle. The arrangement of the comb and the construction of the nozzle are such that a suction air flow flows down through the air inlet to the comb and into the suction opening when the nozzle is in use. This means that the false air is used to clean the comb.

It is also based on the state of the art (e.g. DE 198 05 901 C2 ) to allow false air to flow directly into the floor nozzle or its suction mouth, whereby suction energy is destroyed and is no longer available for cleaning. Therefore, the object of the present invention is to provide a floor nozzle for a suction device, in particular for a vacuum cleaner, for cleaning and/or care of floor surfaces, which has improved suction and thus cleaning performance while simultaneously reducing the pushing forces for the floor nozzle and can preferably be produced cost-effectively and using less material. This object is achieved according to the invention by the features of the independent patent claim. Further advantageous developments are the subject of the subclaims.

• einen Saugmund mit mindestens einer bodenseitig angeordneten Saugmundkante, die eine Saugöffnung des Saugmunds vollständig oder zumindest teilweise umgrenzt, und
• eine Falschlufteinrichtung, ausgebildet Falschluft der Bodendüse zu zuführen.

According to the invention, the present invention comprises a floor nozzle for a suction device, in particular for a vacuum cleaner, for cleaning and/or maintaining floor surfaces:

• a suction mouth with at least one suction mouth edge arranged on the bottom side, which completely or at least partially delimits a suction opening of the suction mouth, and
• a false air device designed to supply false air to the floor nozzle.

According to the invention, the floor nozzle comprises a so-called sealing edge on the floor side, preferably a circumferential sealing edge, within which a negative pressure can be generated by a suction device. The sealing edge can be interrupted or consist of several sections. It is important that a negative pressure can be generated within the area formed by the sealing edge when the suction device or the floor nozzle is in operation.

The at least one sealing edge surrounds the at least one suction mouth edge and at least one outlet of the false air device for false air outside the at least one suction mouth edge. In a preferred embodiment, the sealing edge is formed partially or completely by the suction mouth edge or suction mouth edge sections.

Preferably, in the operating state of the floor nozzle, the false air device is in fluid communication with the suction mouth via the suction opening, so that false air flows or is sucked in from at least one outlet of the false air device below the at least one suction mouth edge into the suction opening. In this way, the cleaning performance on floor surfaces, in particular on carpets, can be increased and pushing forces for moving the floor nozzle can be reduced. In other words, the false air device or its outlet is arranged on/next to the suction mouth or on/next to its edge/suction mouth edge in such a way that false air is sucked in via the suction opening into the suction mouth below the at least one suction mouth edge in such a way that this false air on the one hand reduces the contact pressure of the floor nozzle to reduce the pushing forces and thus make the floor nozzle easier to operate, and on the other hand simultaneously improves the removal of dirt particles by swirling them around or better detaching them from the floor and transporting them along below the above-mentioned suction mouth edge.

In the present description, the term "suction mouth edge" is understood to mean an area that completely or at least partially surrounds or delimits the suction opening, preferably in a similar way to how an edge or an edge area delimits a hole. For example, the suction mouth edge can preferably be formed by one or more profiles that at least partially or completely form an underside of the floor nozzle. A suction mouth edge of the suction mouth can also be designed, for example, as part of a sliding sole of the floor nozzle located on the underside of the floor nozzle.

In the present description, the term "in operation" or "in the operating state" refers to a state in which the floor nozzle rests on a floor surface and preferably the suction device generates a negative pressure in the suction mouth.

Furthermore, it is advantageous if the floor nozzle has a sliding sole on the bottom side for sliding on a floor surface and preferably roller elements, so that the roller elements and the sliding sole advantageously generate a support plane for the floor nozzle.

Advantageously, the roller elements and the sliding sole are arranged on the underside of the floor nozzle in such a way that the suction mouth opening is arranged between them.

Furthermore, it can be provided that the suction mouth edge forms part of the sliding sole.

Furthermore, it is preferred that, particularly in the operating state of the floor nozzle, at least one outlet of the false air device and the suction opening are in fluid communication above or below the at least one suction mouth edge. Thus, dirt particles from a floor surface, particularly in a carpet, can be loosened and transported by false air flowing out of the at least one outlet, which is sucked in by the suction mouth.

It can also be provided that at least one outlet of the false air device and the suction opening are arranged in such a way that in the operating state of the floor nozzle a fluid flow of false air can be established from the at least one outlet into the suction opening below the at least one suction mouth edge. It is precisely by forming a flow from the at least one outlet of the False air device above or below the at least one suction mouth edge towards the suction opening, the false air supplied to the floor nozzle is used not only to reduce the pushing forces of the floor nozzle but also to loosen or move dirt before the actual suction through the suction opening and thus improve the cleaning result.

Advantageously, the false air device comprises an inlet and at least one outlet for false air. False air can therefore flow from the inlet to the at least one outlet.

It is also advantageous if the at least one outlet for false air is arranged outside the at least one suction mouth edge, in particular outside the suction mouth, and at the suction opening, so that false air from the false air device can be used to pre-clean a floor area and to reduce pushing forces. It is precisely through this arrangement, in which the false air device and the suction mouth are in fluid communication with one another via a flow from the at least one outlet of the false air device via the at least one suction mouth edge to the suction opening, that pushing forces can be reduced and a floor area can be pre-cleaned.

In other words, it can be provided that the at least one outlet is arranged in the sliding direction in front of the at least one suction mouth edge and/or in front of the suction mouth. Alternatively, it is possible that the at least one outlet is arranged in the sliding direction behind the at least one suction mouth edge and/or behind the suction mouth. It is also conceivable that the at least one outlet is arranged in the sliding direction next to or to the side of the at least one suction mouth edge and/or next to or to the side of the suction mouth(s). As already mentioned, this arrangement serves precisely to loosen dirt on a floor surface in advance and to facilitate its removal or transport with the established flow between the at least one outlet of the false air device and the suction opening of the suction mouth, which is at least partially or completely bordered/enclosed by the at least one suction mouth edge.

Advantageously, the at least one suction mouth edge has a front edge region and/or a rear edge region and/or a first lateral and/or a second lateral edge region in the sliding direction of the floor nozzle.

One or more edge regions of the at least one suction mouth edge can have further elements, for example made of rubber and/or plastic, for better sealing of the floor nozzle against the environment or the ambient air, so that the flow from the at least one outlet of the false air device to the suction mouth below the at least one suction mouth edge can be improved.

Preferably, the aforementioned edge regions are connected to one another or the edge regions form a one-piece or continuous suction mouth edge. It is also advantageous if the false air device is arranged in the sliding direction of the floor nozzle in front of the front edge region or behind the rear edge region of the at least one suction mouth edge.

In other words, it is advantageous if at least one outlet of the false air device is arranged in the sliding direction in front of the front edge region or behind the rear edge region of the at least one suction mouth edge. In other words again, it is advantageous if all outlets of the false air device are arranged in front of the front edge region or behind the rear edge region of the at least one suction mouth edge.

It is precisely these aforementioned arrangements that allow dirt on a floor surface to be loosened in advance and transported along with it more easily. Preferably, the suction opening and at least one outlet of the false air device are oriented towards an underside of the floor nozzle or towards the floor. Preferably, the underside can be arranged opposite a floor surface to be cleaned, particularly in the operating state.

Furthermore, it is possible for an inlet of the false air device to be oriented towards an upper side of the floor nozzle, wherein the upper side of a floor surface to be cleaned is preferably facing away.

Preferably, an inlet of the false air device is oriented towards a bottom of the floor nozzle or towards a lateral area of the floor nozzle. While the top is advantageously arranged opposite the bottom, a lateral area or areas delimit the floor nozzle to the side, with the lateral areas connecting the top to the bottom.

Advantageously, the false air device comprises an inlet and at least one outlet for false air.

Preferably, two or more outlets are arranged in a row. Advantageously, the row extends across the width of the floor nozzle.

Furthermore, it is advantageous if the false air device has at least one fluid channel between the inlet and the at least one outlet. False air can therefore flow from the inlet to the at least one outlet.

It can also be provided that the at least one fluid channel connects an upper side of the floor nozzle with an underside of the floor nozzle. In this way, "clean" ambient air or false air from a non-dirty area can be used to clean a floor surface.

Preferably, the false air device comprises a diffuser device and/or at least one nozzle device and/or a fluid chamber, which together form at least one fluid channel.

Preferably, the false air device comprises a diffuser device, which preferably has an inlet and an outlet.

It is preferred if the entrance is formed by an inlet of the false air device.

It is also possible for the inlet to have a smaller cross-sectional area than the outlet. A classic diffuser is therefore arranged in the false air device, which represents an increase in the flow cross-section in the direction of flow of the flowing medium, thereby slowing down the flowing fluid or false air.

Preferably, the outlet opens into a fluid chamber of the false air device. Advantageously, the false air device comprises at least one nozzle device, which preferably comprises an inlet and an outlet. It is also advantageous if the outlet is formed by at least one outlet of the false air device.

It is also advantageous if the inlet has a larger cross-sectional area than the outlet. Thus, at least one classic nozzle or at least one classic confuser is arranged in the false air device, which reduces the flow cross-section in the direction of flow of the flowing medium. which increases the speed of the fluid flowing through or the false air.

Preferably, the inlet is connected to a fluid chamber of the false air device. The false air device advantageously comprises a fluid chamber. The fluid chamber essentially has the function of creating a connection between a diffuser device and at least one nozzle device.

Furthermore, it is advantageous if the fluid space has a funnel-shaped cross-section when cut along the sliding direction of the floor nozzle. Thus, the fluid space forms a nozzle shape when cut along the sliding direction of the floor nozzle.

Preferably, the fluid space has a rectangular cross-section when cut transversely to the sliding direction of the floor nozzle.

It is also possible for an outlet of the diffuser device to be connected to an inlet of the at least one nozzle device via the fluid chamber. Preferably, the fluid chamber has a first and a second partial area when cut transversely to the sliding direction of the floor nozzle.

It is also preferred that the first partial area is arranged above the second partial area. Thus, the first partial area is closer to an upper side of the floor nozzle than the second partial area, or the second partial area is closer to an underside of the floor nozzle than the first partial area.

Advantageously, the first sub-area is connected to a diffuser device of the false air device.

It is also advantageous if the first partial area has a rectangular cross-section when cut transversely to the sliding direction of the floor nozzle. The first partial area preferably has a larger cross-section than an outlet of the diffuser device. In this way, the flow cross-section in the flow direction of the flowing medium is increased. The second partial area advantageously adjoins the at least one nozzle device of the false air device.

It is also advantageous if the second partial region has a larger cross-section compared to an outlet of the at least one nozzle device.

Thus, the flow cross-section is reduced in the flow direction of the flowing medium.

Preferably, the second partial region has a funnel-shaped cross-section when cut transversely to the sliding direction of the floor nozzle.

It can also be provided that the floor nozzle comprises a sealing edge which is arranged on the opposite side of at least one outlet of the false air device, so that a fluid flow from the at least one outlet is conveyed in the direction of the suction opening or the flow of fluid from the at least one outlet to the suction opening is supported. It should be noted that the term "suction mouth edge" is preferably to be distinguished from the term "sealing edge". One or more sealing edges of the floor nozzle are advantageously used, on the one hand, to convey or support a fluid flow from the at least one outlet of the false air device to the suction mouth of the floor nozzle below the at least one suction mouth edge; and, on the other hand, preferably to improve the formation of a negative pressure in or below the floor nozzle in the operating state.

It is also possible for the sealing edge to surround the at least one suction mouth edge and at least one outlet of the false air device for false air outside the at least one suction mouth edge. In this way, not only can a negative pressure be generated by a suction device within the suction mouth, but the negative pressure prevailing at the suction opening can also act on the at least one outlet.

Advantageously, the sealing edge is arranged on a rear and/or front edge region and on a first lateral edge region and on a second lateral edge region of the at least one suction mouth edge on the suction mouth edge.

It is advantageous if an area enclosed by the sealing edge, in particular by a circumferential sealing edge, is larger than the area of the suction opening, so that the sealing edge surrounds the at least one suction mouth edge and at least one outlet of the false air device for false air, which is arranged outside the at least one suction mouth edge.

Furthermore, it is preferably provided that the sealing edge is formed by a rubber material or a profile-like projection on the underside of the floor nozzle.

Preferably, an inlet of the false air device has a polygonal shape, in particular a rectangular shape. This is easy to manufacture. Preferably, the inlet can be closed in an adjustable manner so that the floor nozzle according to the invention can be used on different floor coverings and preferably in order to be able to set the desired pushing force.

Furthermore, it is preferred that the false air device comprises a slide control device for manually, step-by-step opening and closing the inlet.

In other words, it is advantageous if the false air device comprises a slide control device which is designed as a path-controlled valve. The slide control device advantageously comprises a slide control element with which the cross-section of the inlet of the false air device can be adjusted, preferably step by step.

It is also advantageous if the sliding control element comprises at least one locking lug for engaging in a locking receptacle.

Preferably, the at least one locking lug is arranged laterally on the slide control element, in particular in a spring-loaded manner. This enables the locking lugs to engage in various predetermined positions on a locking receptacle and to switch between these positions.

The slide control device advantageously comprises at least one locking receptacle for at least one locking lug. The locking receptacle preferably provides various predetermined positions or various locking points for locking at least one locking lug, at which the at least one locking lug of a slide control element or a slide control element can lock. It is therefore possible to lock the slide control element in various positions relative to the locking receptacle and thus to determine the position of the two relative to one another.

It is also advantageous if at least one locking receptacle is formed by a housing of the floor nozzle.

Furthermore, it is advantageous if the floor nozzle comprises a housing which forms the suction mouth, the at least one suction mouth edge, the false air device, the inlet or the diffuser device and the at least one outlet or the at least one nozzle device.

Preferably, the housing is constructed in several parts.

Preferably, the false air device comprises a control device for automatically opening and closing the inlet.

Preferably, the control device is designed as a force-controlled valve.

Furthermore, it is preferred that the control device comprises a closure element with which the inlet can be opened and closed.

Preferably, the control device comprises a stop element against which a closure element can be struck.

Furthermore, it can be provided that the stop element comprises a magnetic or magnetizable material.

It is also possible that the closure element comprises a magnetizable or magnetic material.

Advantageously, the closure element comprises a magnetic/magnetizable material and the stop element comprises a magnetizable/magnetic material, so that both attract each other and the inlet can be closed.

Furthermore, it is advantageous if the magnetic force between the stop element and the closure element can be predetermined, so that preferably as soon as the negative pressure in the suction mouth is higher than the magnetic force between the stop element and the closure element, the closure element opens the inlet, whereby false air passes through the false air device into the suction opening.

Furthermore, it is advantageous if the control device comprises a spring element for applying force to the closure element in the direction of a stop element.

It can also be provided that the spring element applies force to the closure element in the direction of a position in which the closure element closes the inlet and that the closure element opens the inlet, as soon as the negative pressure in the suction mouth is preferably higher than the pressure force of the spring element, to such an extent that false air passes through the closure element into the suction mouth.

Furthermore, it is possible for the spring force of the spring element to be adjustable via a rotary control element for adjusting the length of the spring element between the locking element and the rotary control element.

Preferably, the spring element is arranged between the rotation control element and the closure element.

Preferably, the rotary control element and the closure element are connected to one another via a threaded connection.

It is also advantageous if the rotary control element has a pot-shaped cross-section.

Furthermore, it can be provided that the rotary control element comprises an internal thread.

Conveniently, the locking element can be screwed into the open side of the rotary control element.

It is also possible for the closure element to have an external thread.

In a further preferred embodiment, the control device of the force-controlled valve can comprise both magnetic or magnetizable materials and a spring element. This achieves greater precision when adjusting the valve to the working pressure of the floor nozzle.

In the following, the inventive concept presented above is additionally expressed in other words.

This idea preferably concerns - in simplified terms - a floor nozzle with a false air device, with which it is possible to use the energy of the false air to clean the floor.

Fig. 1

eine Schnittansicht auf die erfindungsgemäße Bodendüse mit einem vergrößerten Ausschnitt;

Fig. 2

eine Schnittdarstellung der 3-dimensional dargestellten, erfindungsgemäßen Bodendüse aus Figur 1;

Fig. 3

eine untere Ansicht auf die erfindungsgemäße Bodendüse aus Figur 1; und

Fig. 4

eine Schnittansicht ähnlich Figur 1, jedoch gemäß einem weiteren Ausführungsbeispiel der erfindungsgemäßen Bodendüse.

The invention is explained in more detail below using exemplary embodiments in conjunction with the accompanying drawings. The drawings show schematically:

Fig. 1

a sectional view of the floor nozzle according to the invention with an enlarged detail;

Fig. 2

a sectional view of the 3-dimensionally illustrated floor nozzle according to the invention Figure 1 ;

Fig. 3

a bottom view of the floor nozzle according to the invention Figure 1 ; and

Fig. 4

a sectional view similar Figure 1 , but according to a further embodiment of the floor nozzle according to the invention.

In the following description, the same reference symbols are used for the same items.

Figure 1 shows a sectional view of the floor nozzle 1 according to the invention with an enlarged detail.

Shown in more detail Figure 1 a floor nozzle 1 for a suction device, in particular for a vacuum cleaner, for cleaning and/or maintaining floor surfaces.

The floor nozzle 1 mentioned has according to Figure 1 a suction mouth 2 with a suction mouth edge 3 arranged on the bottom (better shown in Figure 3 ), which completely encloses a suction opening 4. Thus, the suction mouth edge 3 delimits the suction opening 4.

Furthermore, the floor nozzle 1 has a false air device 5 which is designed to supply false air to the floor nozzle 1, whereby pushing forces for pushing the floor nozzle 1 can be reduced.

In the operating state of the floor nozzle 1, in which the floor nozzle 1 rests on a floor surface and a suction device generates a negative pressure in the suction mouth 2, the false air device 5 is in fluid communication with the suction mouth 2 via the suction opening 4, so that false air flows from outlets 7 of the false air device 5 below the suction mouth edge 3 into the suction opening 4. This allows the cleaning performance on floor surfaces, in particular on carpets, to be increased and at the same time pushing forces for moving the floor nozzle 1 to be reduced.

Thus, various outlets 7 of the false air device 5 and the suction opening 4 are in fluid communication via the suction mouth edge 3 in order to loosen and transport dirt particles from a floor surface, in particular in a carpet, by means of the false air flowing out of the outlets 7, which is sucked in by the suction mouth 2.

To put it another way, Figure 1 that various outlets 7 of the false air device 5 and the suction opening 4 are arranged relative to one another in such a way that a fluid flow of false air from the outlets 7 into the suction opening 4 below the suction mouth edge 3 can be established.

To clarify the above statements, Figure 1 a flow arrow P is drawn along which false air flows from an inlet 6 to an outlet 7 and into the suction opening 4 when negative pressure is generated in the suction mouth 2 or in the operating state.

The false air device 5 is explained in greater detail below. The false air device 5 has an inlet 6 and various outlets 7 for false air, whereby the outlets 7 for false air are arranged outside the suction mouth edge 3, outside the suction mouth 2 and at the suction opening 4. In this way, false air from the false air device 5 can be used to pre-clean a floor area and to reduce pushing forces.

Here, the outlets 7 are arranged in the sliding direction S in front of the suction mouth edge 3 and in front of the suction mouth 2.

Looking more closely, the suction opening 4 and the outlets 7 of the false air device 5 are oriented towards a bottom U of the floor nozzle 1 or towards the floor, wherein the bottom U can be arranged opposite a floor surface to be cleaned.

Furthermore, the inlet 6 of the false air device 5 is oriented towards an upper side O of the floor nozzle 1, wherein the upper side O faces away from a floor surface to be cleaned.

As already mentioned, the false air device 5 has an inlet 6 and various outlets 7 for false air, between which the false air device 5 has a fluid channel 12.

The fluid channel 12 connects the upper side O of the floor nozzle 1 with the lower side U of the floor nozzle 1.

Figure 2 shows a sectional view of the 3-dimensionally illustrated floor nozzle 1 according to the invention from Figure 1 .

So in Figure 2 shown that the false air device 5 has a diffuser device 13, various nozzle devices 14 and a fluid chamber 15, which together form the fluid channel 12.

The diffuser device 13 has an inlet 16 and an outlet 17, wherein the inlet 16 is formed by the inlet 6 of the false air device 5.

How easy Figure 2 As can be seen, the inlet 16 has a smaller cross-sectional area than the outlet 17, which opens into the fluid chamber 15 of the false air device 5. Thus, the flow cross-section in the flow direction of the flowing medium is increased, whereby the flowing fluid or the false air can be slowed down or is slowed down.

As mentioned, the false air device 5 has various nozzle devices 14, each of which comprises an inlet 18 and an outlet 19.

Each outlet 19 is formed by an outlet 7 of the false air device 5, wherein the inlet 18 has a larger cross-sectional area than the outlet 19. In this way, the flow cross-section in the flow direction of the flowing medium is reduced, whereby the flowing fluid or the false air can be accelerated or is accelerated.

All in all, the outlet 17 of the diffuser device 13 is connected to the inlet 18 of the nozzle device 14 via the fluid space 15.

Furthermore, in Figure 2 shown that an inlet 18 of a nozzle device 14 connects to the fluid space 15 of the false air device 5.

The fluid chamber 15 has, as in Figure 1 shown, in a section along the sliding direction S of the floor nozzle 1, a funnel-shaped cross section, wherein the fluid space 15 in a section transverse to the sliding direction S of the floor nozzle 1, as in Figure 2 shown, has a rectangular cross-section.

Furthermore, Figure 2 It can be seen that the fluid chamber 15 has a first and a second partial region 20, 21 when cut transversely to the sliding direction S of the floor nozzle 1.

The first partial area 20 is arranged above the second partial area 21 and adjoins the diffuser device 13 of the false air device 5.

The first subsection 20 has, as in Figure 2 As can be seen, when cut transversely to the sliding direction S of the floor nozzle 1, it has a rectangular cross-section, whereby the first partial region 20 has a larger cross-section compared to the outlet 17 of the diffuser device 13.

The second partial area 21, on the other hand, connects to the nozzle devices 14 of the false air device 5 and has a larger cross-section compared to the outlets 19 of the nozzle device 14.

In a section transverse to the sliding direction S of the floor nozzle 1, the second partial area 21, like the first partial area 20, has a funnel-shaped cross-section (compare Figure 1 ).

As in particular in Figure 2 As can be seen, the inlet 6 of the false air device 5 has a rectangular shape and can be closed in an adjustable manner.

In other words, the false air device 5 has a slide control device 23 for manually, step-by-step opening and closing the cross-section of the inlet 6.

The slide control device 23 comprises a slide control element 24 with two locking lugs 25, 26 for engaging in a locking receptacle 27 and a locking receptacle 27 for the locking lugs 25, 26.

While the two locking lugs 25, 26 are arranged in a spring-loaded manner on the side of the sliding control element 24, the locking receptacle 27 has various locking points for locking the locking lugs 25, 26. It is therefore possible to lock the sliding control element 24 in various positions relative to the locking receptacle 27 and thus to determine the position of the two relative to one another.

Also, Figure 2 It can be seen that the slide control element 24 is formed in one piece and the locking receptacle 27 is formed by a housing 28 of the floor nozzle 1.

The housing 28 of the floor nozzle 1 is constructed in several parts and forms the suction mouth 2, the suction mouth edge 3, the false air device 5, the inlet 6 or the diffuser device 13 and the outlets 7 or the nozzle devices 14.

Figure 3 shows a bottom view of the floor nozzle 1 according to the invention from Figure 1 . In this case, Figure 3 It can be seen that the suction mouth edge 3 in the sliding direction S of the floor nozzle 1 has a front edge region 8, a rear edge region 9, a first lateral edge region 10 and a second lateral edge region 11.

The aforementioned edge areas 8, 9, 10, 11 are connected to each other or form a one-piece suction mouth edge 3.

The false air device 5 is arranged in the sliding direction S of the floor nozzle 1 in front of the front edge region 8 of the suction mouth edge 3, whereby all outlets 7 of the false air device 5 are arranged in front of the front edge region 8 of the suction mouth edge 3.

Furthermore, in Figure 3 It can be seen that the outlets 7 are arranged in a row and the row of outlets 7 extends across the width of the floor nozzle 1.

Also shows Figure 3 that the floor nozzle 1 comprises a circumferential sealing edge 22 within which a vacuum can be generated by a suction device. The sealing edge 22 can also be interrupted or consist of several sections. It is important that a sufficient vacuum can still be generated when the suction device or the floor nozzle is in operation. At least part of the sealing edge 22 can be formed by parts of the suction mouth edge 3.

The sealing edge 22 surrounds the suction mouth edge 3 and the outlets 7 of the false air device 5 for false air outside the suction mouth edge 3, wherein the sealing edge 22 is preferably arranged on the rear edge region 9 on the first lateral edge 10 and on the second lateral edge region 11 on the suction mouth edge 3. The circumferential sealing edge 22 advantageously encloses a larger area compared to the suction opening 4, so that the sealing edge 22 surrounds the suction mouth edge 3 and the outlets 7 of the false air device 5 for false air, which are arranged outside the suction mouth edge 3.

Below are the Figures 1 to 3 described again in other words.

The floor nozzle 1 is designed according to Figures 1 and 2 equipped with an adjustable false air opening 6 or an inlet 6 or with a slide control device 23.

The false air opening 6 or the sliding control device 23 can be opened more or less depending on the floor covering. A detent 25, 26, 27 prevents unintentional adjustments.

Figure 2 shows a cut fluid channel 12, which leads false air to small openings 7 or outlets 7 on the front underside U of the floor nozzle 1. In the present case, these openings 7 are designed as a strip.

Said openings 7 or outlets 7 are arranged within the sealing edge 22 of the floor nozzle 1, in which a negative pressure can be generated by a suction device (see Figure 3 ).

The incoming false air flows, as in Figure 1 indicated by a flow arrow P, through the fluid channel 12 towards the underside U.

This incoming air ensures, on the one hand, a reduction in the negative pressure or reduces the pushing forces, and, on the other hand, the air is intended to shoot through the nozzle device 14 into a carpet or onto a floor surface and loosen dust particles.

As already mentioned, the reduction in the negative pressure results in a reduction in the pushing forces. The use of false air in front of the suction mouth 2 is intended to ensure that the cleaning performance on carpets in particular is increased, while at the same time the pushing forces do not exceed an uncomfortable range.

The incoming false air, which is sucked in by the suction mouth 2, is intended to loosen dirt particles in the carpet or on a floor surface and transport them along with it. In addition, as already mentioned, it is possible to adjust the opening 6 or the inlet 6 or the cross-section of the inlet 6 to the carpet to be cleaned using the slide control device 23.

Figure 4 shows a sectional view similar Figure 1 , but according to a further embodiment of the floor nozzle 1 according to the invention.

Unless explicitly stated otherwise, the previous statements concerning the embodiment from the Figures 1 to 3 for a floor nozzle 1 also to the embodiment according to Figure 4 applicable.

Accordingly, only the relevant differences between the two embodiments from the Figures 1 to 3 and out Figure 4 received. This shows Figure 4 that the false air device 5 has a control device 29 for the automatic opening and closing of the inlet 6 instead of a slide control device 23 for the manual, step-by-step opening and closing of the cross-section of the inlet 6.

The control device 29 has a closure element 30 with which the inlet 6 can be opened and closed.

Furthermore, the control device 29 has a stop element 31 against which the closure element 30 can be struck.

In the special embodiment according to Figure 4 the closure element 30 comprises a magnetic material and the stop element 31 comprises a magnetizable material, so that both attract each other and the inlet 6 can be closed.

In the area where the nozzle rests, a working pressure of around 120 mbar is usually established during operation. The magnetic force in the valve mentioned above is designed in such a way that the valve gives way when this working pressure is reached and the opening opens to atmospheric pressure. As a result, air flows - as in Fig. 1 and Fig. 4 indicated - air or false air through the air duct towards the carpet. This incoming air ensures, on the one hand, that the working pressure is reduced at this moment, and, on the other hand, the geometry of the air duct is intended to shoot the air into the carpet and loosen dust particles.

Furthermore, the control device 29 can also have a spring element 32 for applying force to the closure element 30 in the direction of a stop element 31. This is to support a precise adjustment of the valve to the floor surface to be cleaned. The magnetic force can be additionally supported by the force of the spring element 32 by specifically relieving or supporting the magnetic force by pre-tensioning or by relieving the spring in the spring element 32. In a preferred embodiment of the present invention, however, the magnetic force can be dispensed with, so that the valve is controlled exclusively via the spring element 32.

The spring element 32 applies force to the closure element 30 in the direction of a position in which the closure element 30 closes the inlet 6, and the closure element 30 opens the inlet 6 as soon as the negative pressure in the suction mouth 2 is higher than the pressure force of the spring element 32, so that false air passes through the closure element 30 into the suction mouth 2.

Here, the spring force of the spring element 32 is controlled via a rotary control element 33 for adjusting the length of the spring element 32 between the closure element 30 and Rotary control element 33 adjustable, wherein the spring element 32 is arranged between the rotary control element 33 and the closure element 30.

Although it is in Figure 4 difficult to see, but the rotary control element 33 and the closure element 30 are connected to one another via a threaded connection. The rotary control element 33 is pot-shaped in cross section and has an internal thread, while the closure element 30 is screwed into the open side of the rotary control element 33 with its external thread.

Below Figure 4 described again in other words.

The floor nozzle 1 is, as in Figure 4 shown, equipped with a valve 29 or with a control device 29 and an air channel 12 or a fluid channel 12. The valve 29 has a closure element 30 which prevents passage to atmospheric pressure. Under the closure element 30 there is also a spring element 32 which can increase or reduce its holding force by adjustment.

In the area of the support of the floor nozzle 1, which is at least enclosed by the sealing edge 22, a working pressure of approximately 120 mbar is established during operation.

The closure element 30 in conjunction with the spring element 32 is designed in such a way that it gives way when this working pressure is reached and opens the opening to atmospheric pressure. As a result, as in Figure 4 indicated by a flow arrow P, false air or air through the air channel 12 or fluid channel 12 in the direction of the underside U.

On the one hand, this incoming air ensures that the working pressure is reduced at that moment, and on the other hand, the nozzle-like geometry of the outlets 7 is intended to shoot the false air into the carpet or onto a floor surface and loosen dirt such as dust particles.

As already mentioned, the reduction in working pressure results in a reduction in pushing forces. This should ensure that the cleaning performance on floor surfaces such as carpets is increased, while at the same time the pushing forces do not exceed an uncomfortable level.

In addition, the possibility should be provided to adjust the valve 29 or the control device 29 to a floor surface to be cleaned. This is achieved by the spring force of the closure element 30 being Spring element 32 is influenced by the fact that the closing force of the closure element 30 can be adjusted by preloading the spring element 32.

list of reference symbols

1 floor nozzle 21 second sub-area 2 suction mouth 22 sealing edge 3 suction mouth edge 23 slide control device 4 suction opening 24 slider control element 5 false air device 25 locking lug 6 inlet 26 locking lug 7 outlet 27 locking mechanism 8 front edge area 28 Housing 9 rear edge area 29 control device 10 first lateral edge area 30 closure element 11 second lateral edge area 31 stop element 12 fluid channel 32 spring element 13 diffuser device 33 rotary control element 14 nozzle device 15 fluid space S sliding direction 16 entrance of the diffuser device U bottom 17 outlet of the diffuser device O top 18 inlet of the nozzle device P flow arrow 19 outlet of the nozzle device 20 first subsection

Claims (15)

1. A floor nozzle (1) for a suction device, in particular for a vacuum cleaner, for cleaning floor surfaces having:

   - a suction mouth (2) with at least one suction mouth edge (3) arranged on the floor side, which completely or at least partially borders a suction opening (4),

   - at least one sealing edge (22) arranged on the floor side, within which a negative pressure can be generated by means of a suction device, as well as

   - a false air device (5), formed to supply false air to the floor nozzle (1),

   - wherein the at least one sealing edge (22) surrounds the at least one suction mouth edge (3) and at least one outlet (7) of the false air device (5) for false air outside of the at least one suction mouth edge (3) and wherein

   - in the operating state of the floor nozzle (1), the false air device (5) is in fluid connection with the suction mouth (2) via the suction opening (4), so that false air from at least one outlet (7) of the false air device (5) flows into the suction opening (4) below the at least one suction mouth edge (3).
2. The floor nozzle according to claim 1,

   - wherein at least one outlet (7) of the false air device (5) and the suction opening (4) are in fluid communication via the at least one suction mouth edge (3), in order to release and convey dirt particles from a floor surface, in particular in a carpet, by means of false air, which flows out of the at least one outlet (7) and which is sucked in by the suction mouth (2),

   - wherein at least one outlet (7) of the false air device (5) and the suction opening (4) are preferably arranged relative to one another in such a way that in the operating state of the floor nozzle, a fluid flow of false air from the at least one outlet (7) into the suction opening (4) below the at least one suction mouth edge (3) can be established.
3. The floor nozzle according to claim 1 or 2,

   - wherein the false air device (5) comprises an inlet (6) and at least one outlet (7) for false air,

   - wherein the at least one outlet (7) for false air is preferably arranged outside of the at least one suction mouth edge (3), in particular outside of the suction mouth (2), and on the suction opening (4), so that false air from the false air device (5) can be used for pre-cleaning a floor surface and for reducing pushing forces,

   - wherein the at least one outlet (7) is preferably arranged upstream of the at least one suction mouth edge (3) and/or upstream of the suction mouth (2) in the pushing direction (S), or wherein the at least one outlet (7) is arranged downstream from the at least one suction mouth edge (3) and/or downstream from the suction mouth (2) in the pushing direction (S).
4. The floor nozzle according to any one of the preceding claims,

   - wherein the at least one suction mouth edge (3) has a front edge region (8), a rear edge region (9), a first lateral (10) and/or a second lateral edge region (11) in the pushing direction (S) of the floor nozzle (1),

   - wherein the false air device (5) is preferably arranged upstream of the front edge region (8) of the at least one suction mouth edge (3) in the pushing direction (S) of the floor nozzle (1),

   - wherein at least one outlet (7) of the false air device (5) is preferably arranged upstream of the front edge region (8) or downstream from the rear edge region (9) of the at least one suction mouth edge (3) in the pushing direction (S),

   - wherein all outlets (7) of the false air device (5) are preferably arranged upstream of the front edge region (8) or downstream from the rear edge region (9) of the at least one suction mouth edge (3).
5. The floor nozzle according to any one of the preceding claims,

   - wherein the suction opening (4) and at least one outlet (7) of the false air device (5) are oriented towards an underside (U) of the floor nozzle (1) or on the floor side,

   - wherein the underside (U) can be arranged so as to lie opposite a floor surface to be cleaned,

   - wherein an inlet (6) of the false air device (5) is preferably oriented towards a top side (O) of the floor nozzle (1),

   - wherein an inlet (6) of the false air device (5) is preferably oriented towards an underside (U) of the floor nozzle (1) or towards a lateral region of the floor nozzle (1).
6. The floor nozzle according to any one of the preceding claims,

   - wherein the false air device (5) comprises an inlet (6) and at least one outlet (7) for false air,

   - wherein the false air device (5) has at least one fluid duct (12) between the inlet (6) and the at least one outlet (7),

   - wherein the at least one fluid duct (12) preferably connects a top side (O) of the floor nozzle (1) to an underside (U) of the floor nozzle (1),

   - wherein the false air device (5) preferably comprises a diffusor device (13) and/or at least one nozzle device (14) and/or a fluid chamber (15), which, together, form at least one fluid duct (12).
7. The floor nozzle according to any one of the preceding claims,

   - wherein the false air device (5) comprises a diffusor device (13),

   - wherein the diffusor device (13) preferably comprises an input (16) and an output (17),

   - wherein the input (16) is preferably formed by an inlet (6) of the false air device (5),

   - wherein the input (16) preferably has a smaller cross sectional surface than the output (17),

   - wherein the output (17) preferably leads into a fluid chamber (15) of the false air device (5).
8. The floor nozzle according to any one of the preceding claims,

   - wherein the false air device (5) comprises at least one nozzle device (14),

   - wherein the at least one nozzle device (14) preferably comprises an input (18) and an output (19),

   - wherein the output (19) is preferably formed by at least one outlet (7) of the false air device (5),

   - wherein the input (18) preferably has a larger cross sectional surface than the output (19),

   - wherein the input (18) preferably connects to a fluid chamber (15) of the false air device (5).
9. The floor nozzle according to any one of the preceding claims,

   - wherein the false air device (5) comprises a fluid chamber (15),

   - wherein in the case of a section along the pushing direction (S) of the floor nozzle (1), the fluid chamber (15) preferably has a funnel-shaped cross section,

   - wherein in the case of a section transversely to the pushing direction (S) of the floor nozzle (1), the fluid chamber (15) preferably has a rectangular cross section,

   - wherein an output (17) of the diffusor device (13) is preferably connected to an input (18) of the at least one nozzle device (14) via the fluid chamber (15).
10. The floor nozzle according to claim 9,

    - wherein in the case of a section transversely to the pushing direction (S) of the floor nozzle (1), the fluid chamber (15) has a first and a second partial region (20, 21),

    - wherein the first partial region (20) is preferably arranged above the second partial region (21).
11. The floor nozzle according to claim 10,

    - wherein the first partial region (20) connects to a diffusor device (13) of the false air device (5),

    - wherein in the case of a section transversely to the pushing direction (S) of the floor nozzle (1), the first partial region (20) preferably has a rectangular cross section,

    - wherein first partial region (20) preferably has a cross section, which is larger compared to an output (17) of the diffusor device (13).
12. The floor nozzle according to claim 10 or 11,

    - wherein the second partial region (21) connects to at least one nozzle device (14) of the false air device (5),

    - wherein the second partial region (21) preferably has a cross section, which is larger compared to an output (19) of the at least one nozzle device (14),

    - wherein in the case of a section transversely to the pushing direction (S) of the floor nozzle (1), the second partial region (21) preferably has a funnel-shaped cross section.
13. The floor nozzle according to any one of the preceding claims,

    - wherein at least a part of the sealing edge (22) is formed by the at least one suction mouth edge (3).
14. The floor nozzle according to any one of the preceding claims,

    - wherein an inlet (6) of the false air device (5) has a polygonal shape, in particular a rectangular shape,

    - wherein the inlet (6) can preferably be closed in a controllable manner,

    - wherein the false air device (5) preferably comprises a push control device (23) for manually, gradually opening and closing the cross section of the inlet (6),

    - wherein the push control device (23) preferably comprises a push control element (24),

    - wherein the push control element (24) preferably comprises at least one locking lug (25, 26) for engaging with a locking receptacle (27),

    - wherein the at least one locking lug (25, 26) is preferably arranged laterally on the push control element (24), in particular resiliently,

    - wherein the push control device (23) preferably comprises at least one locking receptacle (27) for at least one locking lug (25, 26),

    - wherein the at least one locking receptacle (27) is preferably formed by a housing (28) of the floor nozzle (1).
15. The floor nozzle according to any one of the preceding claims,

    - wherein the false air device (5) comprises a control device (29) for automatically opening and closing the inlet (6),

    - wherein the control device (29) preferably comprises a closure element (30), by means of which the inlet (6) can be opened and closed,

    - wherein the control device (29) preferably comprises an abutment element (31), against which a closure element (30) can be abutted,

    - wherein the closure element (30) preferably has a magnetic or magnetizable material and the abutment element (31) has a magnetizable/magnetic material, so that both attract each other and the inlet (6) can be closed,

    - wherein the magnetic force between abutment element (31) and closure element (30) can preferably be predetermined, so that the closure element (30) opens the inlet (6) as soon as the negative pressure in the suction mouth (2) is higher than the magnetic force between abutment element (31) and closure element (30), whereby false air reaches through the false air device (5) into the suction opening (4),

    - wherein the control device (29) preferably comprises a spring element (32) for applying force to the closure element (30) in the direction of an abutment element (31),

    - wherein the spring element (32) preferably applies force to the closure element (30) in the direction of a position, in which the closure element (30) closes the inlet (6), and the closure element (30) opens the inlet (6), as soon as the negative pressure in the suction mouth (2) is higher than the compressive force of the spring element (32), to the extent that false air reaches through the closure element (30) into the suction mouth (2),

    - wherein the spring force of the spring element (32) can preferably be set via a rotational control element (33) in order to set the length of the spring element (32) between closure element (30) and rotational control element (33),

    - wherein the spring element (32) is preferably arranged between the rotational control element (33) and the closure element (30),

    - wherein the rotational control element (33) and the closure element (30) are preferably connected to one another via a threaded connection.

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