Grounding nozzle for a suction device for cleaning and caring for floor surfaces

Abstract

The present invention relates to a suction device for cleaning floor surfaces, particularly a grounding nozzle (1) of a vacuum cleaner, comprising: a suction port (2) having at least one suction port edge (3) disposed on the floor side, the suction port edge at least partially surrounding and defining a suction opening (4); and an air supply device (5) for supplying supplementary air to the grounding nozzle (1), wherein, in the operating state of the grounding nozzle (1), the air supply device (5) is fluidly connected to the suction port (2) through the suction opening (4), such that supplementary air flows from at least one outlet (7) of the air supply device (5) into the suction opening (4) below the at least one suction port edge (3).

Description

Technical Field

[0001] This invention relates to a suction device for cleaning and / or caring for floor surfaces, particularly a grounded nozzle for a vacuum cleaner. Background Technology

[0002] A known problem with grounded nozzles used in suction devices or vacuum cleaners is that the propulsion force is related to the amount of dust collected.

[0003] To improve suction efficiency and better absorb dust, the pushing or sliding force of the grounding nozzle is increased. This results in excessive operating force because the grounding nozzle adheres to the ground or ground surface with great force.

[0004] To prevent the grounding nozzle from sticking so firmly, there are different solutions to introduce so-called supplemental air (Falschluft) into the grounding nozzle, suction device, or vacuum cleaner, thereby reducing suction efficiency and simultaneously decreasing the pushing force on the grounding nozzle.

[0005] However, a known drawback of existing solutions is that supplemental air is typically introduced after the suction port of the so-called ground nozzle, for example, at the so-called bend in the vacuum cleaner hose.

[0006] This reduces the cleaning effect because the suction is disrupted by the addition of air in this arrangement.

[0007] It is also known from existing technologies (e.g., DE 198 05 901 C2) that allowing supplemental air to flow directly into the grounded nozzle or its suction port disrupts suction and renders it unusable for cleaning. Summary of the Invention

[0008] Therefore, the object of the present invention is to provide a suction device, particularly a grounding nozzle for a vacuum cleaner, for cleaning and / or caring for floor surfaces, which has improved suction efficiency and thus improved cleaning efficiency while reducing the pushing force of the grounding nozzle, and preferably can be manufactured in a low-cost and material-saving manner.

[0009] According to the invention, this objective is achieved by the features of the independent claim. The dependent claims relate to other advantageous extensions.

[0010] According to the present invention, a grounding nozzle for a suction device, particularly a vacuum cleaner, for cleaning and / or caring for floor surfaces includes:

[0011] A suction port having at least one suction port edge disposed on the ground side, the suction port edge completely or at least partially surrounding the suction opening defining the suction port, and

[0012] An air supply device for supplying supplementary air to the grounding nozzle.

[0013] According to the present invention, the grounding nozzle includes a so-called sealing edge on the ground side, preferably a surrounding sealing edge, within which a negative pressure can be generated by a suction device. The sealing edge may be discontinuous or composed of multiple segments. Importantly, a negative pressure can be generated within the area formed by the sealing edge during the operation of the suction device or the grounding nozzle.

[0014] Here, at least one sealing edge surrounds at least one suction port edge and at least one outlet of the air replenishment device for replenishing air, in addition to at least one suction port edge. In a preferred embodiment, the sealing edge is partially or entirely formed by the suction port edge or a section of the suction port edge.

[0015] Preferably, during the operation of the grounding nozzle, the air supply device is in fluid communication with the suction port through a suction opening, such that supply air flows into or is drawn into the suction port from at least one outlet of the air supply device below at least one edge of the suction port. In this way, the cleaning efficiency for floor surfaces, especially carpeted surfaces, can be improved, and the pushing force required to drive the grounding nozzle can be reduced. In other words, the air supply device or its outlet is positioned such that supply air is drawn into the suction port below at least one edge of the suction port through the suction opening, thereby reducing the pressure on the grounding nozzle to decrease the pushing force and thus making the grounding nozzle easier to operate. Simultaneously, it improves the removal of dirt particles through the vortex of the supply air and better detachment from the floor, and their transport away below the aforementioned suction port edge.

[0016] In this specification, the term "suction port edge" should be understood as a portion that completely or at least partially surrounds or defines the suction port, preferably resembling the edge or edge region of a defining hole. For example, the suction port edge may preferably be formed of one or more profiles that at least partially or completely constitute the underside of the grounding nozzle. The suction port edge of the suction port may also be implemented, for example, as part of a sliding base plate located on the underside of the grounding nozzle.

[0017] The term "in operation" or "in operating condition" in this specification can be understood as the state in which the grounding nozzle is in contact with the ground surface and, preferably, a negative pressure is generated in the suction port by the suction device.

[0018] Furthermore, it is advantageous that the grounding nozzle has a sliding base plate on its bottom side for sliding on the ground surface and preferably has a rolling element, thereby the rolling element and the sliding base plate advantageously creating a support surface for the grounding nozzle.

[0019] Advantageously, the rolling element and the sliding base plate are arranged on the bottom side of the grounded suction nozzle, so that the suction opening is arranged between them.

[0020] In addition, it can be stipulated that the edge of the suction port forms part of the sliding base plate.

[0021] Furthermore, preferably, especially in the operating state of the grounding nozzle, at least one outlet of the replenishing air device is in fluid communication with the suction opening via or below at least one suction port edge. Therefore, the replenishing air flowing from at least one outlet and drawn in by the suction port can detach and carry away dirt particles from the floor surface, particularly in carpets.

[0022] Alternatively, it can be specified that at least one outlet and suction opening of the air supply device are arranged relative to each other such that, during the operation of the grounding nozzle, a fluid flow of supply air can be established from at least one outlet to the suction opening below the edge of at least one suction opening. It is precisely by forming a flow from at least one outlet of the air supply device toward the suction opening via or above the edge of at least one suction opening that the supply air input to the grounding nozzle, in addition to reducing the driving force of the grounding nozzle, also serves to loosen or move dirt before it is actually suctioned through the suction opening, thereby improving the cleaning effect.

[0023] Advantageously, the air replenishment device includes an inlet for replenishing air and at least one outlet. Therefore, replenishing air can flow from the inlet to at least one outlet.

[0024] It is also advantageous that at least one outlet for replenishing air is arranged outside the edge of at least one suction port, particularly outside the suction port and near the suction opening, so that the replenishing air from the replenishing air device can be used to pre-clean the ground surface and to reduce thrust. It is through this arrangement, where the replenishing air device and the suction port are fluidly connected to each other via flow from at least one outlet of the replenishing air device through the edge of at least one suction port to the suction opening, that thrust can be reduced and the ground surface pre-cleaned.

[0025] In other words, it can be specified that at least one outlet is arranged in the direction of propulsion before and / or before at least one suction port edge. Alternatively, at least one outlet can be arranged in the direction of propulsion after at least one suction port edge and / or after the suction port. It is also conceivable that at least one outlet is arranged in the direction of propulsion beside or to the side of at least one suction port edge, and / or beside or to the side of the suction port. As previously stated, this arrangement is precisely for facilitating the pre-removal and removal or carry-away of contaminants on the ground surface by establishing flow between at least one outlet of the air supply device and the suction opening of the suction port, which is at least partially or completely surrounded or enclosed by at least one suction port edge.

[0026] Advantageously, at least one suction port edge has a front edge region and / or a rear edge region and / or a first lateral edge region and / or a second lateral edge region along the pushing direction of the grounding nozzle. One or more edge regions of at least one suction port edge may have other elements, such as those made of rubber and / or plastic, to improve the sealing of the grounding nozzle against the environment and ambient air, thereby improving the flow of (replenished air) from at least one outlet of the replenishment air device below at least one suction port edge to the suction port.

[0027] The edge regions are preferably connected to each other, or the edge regions form an integral or continuous suction port edge.

[0028] Furthermore, it is advantageous that the air replenishment device is arranged along the pushing direction of the grounding nozzle before or after the front edge region of at least one suction port.

[0029] In other words, it is advantageous that at least one outlet of the air replenishment device is arranged in the pushing direction before or after the front edge region of at least one suction port.

[0030] In other words, it is advantageous that all outlets of the air supply device are arranged before or after the front edge of at least one suction port edge.

[0031] These arrangements allow dirt to be removed from the ground surface beforehand and made easy to carry away.

[0032] Preferably, at least one outlet of the suction opening and the air replenishment device is oriented toward the bottom side of the grounding nozzle or the ground side.

[0033] Preferably, the bottom side, especially in operation, can be positioned opposite the ground surface to be cleaned.

[0034] In addition, the inlet of the air replenishment device can be oriented toward the top side of the grounding nozzle, wherein preferably, the top side faces away from the ground surface to be cleaned.

[0035] Preferably, the inlet of the air supply device is oriented toward the bottom side of the grounding nozzle or toward the side region of the grounding nozzle. While the top side is advantageously arranged opposite the bottom side, one or more side regions define the grounding nozzle on the side, wherein the side regions connect the top and bottom.

[0036] Advantageously, the air replenishment device includes an inlet for replenishing air and at least one outlet.

[0037] Preferably, two or more outlets are arranged in a row. Advantageously, the row extends across the width of the grounding nozzle.

[0038] Furthermore, it is advantageous that the air replenishment device has at least one fluid passage between the inlet and at least one outlet. Therefore, replenishment air can flow from the inlet to at least one outlet.

[0039] It can also be specified that at least one fluid channel connects the top side of the grounding nozzle to the bottom side of the grounding nozzle. In this way, "cleaner" ambient air or supplemental air from uncontaminated areas can be used to clean the ground surface.

[0040] The air replenishment device preferably includes a diffuser and / or at least one nozzle and / or fluid chamber that together form at least one fluid channel.

[0041] The air replenishment device preferably includes a diffusion device, which preferably has an input section and an output section.

[0042] Preferably, the input section is formed by the inlet of the air replenishment device.

[0043] Furthermore, the input section can have a smaller cross-section than the output section. Therefore, a conventional diffuser is arranged in the air supply device, which means an increase in the flow cross-section in the flow direction of the fluid, thus slowing down the flow of the fluid or the supply air.

[0044] Preferably, the output section is introduced into the fluid chamber of the air replenishment device.

[0045] Advantageously, the air replenishment device includes at least one nozzle device, which preferably includes an input section and an output section.

[0046] Furthermore, it is advantageous that the output section consists of at least one outlet of the air replenishment device.

[0047] Advantageously, the input section has a larger cross-section than the output section. Therefore, at least one conventional nozzle or at least one conventional konfusor is arranged in the air supply device, which means a reduction in the flow cross-section in the flow direction of the fluid, thereby increasing the velocity of the fluid or the supplied air.

[0048] Preferably, the input section is connected to the fluid chamber of the air replenishment device.

[0049] Advantageously, the air replenishment device includes a fluid chamber. The fluid chamber essentially functions as a connection between the diffuser and at least one nozzle device.

[0050] Furthermore, it is advantageous that the fluid chamber has a funnel-shaped cross-section in the section along the pushing direction of the grounding nozzle. Therefore, the fluid chamber forms a nozzle shape at this section along the pushing direction of the grounding nozzle.

[0051] Preferably, the fluid chamber has a rectangular cross-section in a section transverse to the pushing direction of the grounding nozzle.

[0052] Furthermore, the output of the diffusion device can be connected to the input of at least one nozzle device via a fluid chamber.

[0053] Preferably, the fluid chamber has a first sub-region and a second sub-region in a cross-section transverse to the pushing direction of the grounding nozzle.

[0054] Preferably, the first sub-region is arranged above the second sub-region. Therefore, the first sub-region is closer to the top side of the grounding nozzle than the second sub-region, or the second sub-region is closer to the bottom side of the grounding nozzle than the first sub-region.

[0055] Advantageously, the first sub-region is connected to the diffusion device of the air replenishment device.

[0056] Furthermore, it is advantageous that the first sub-region has a rectangular cross-section in the section transverse to the pushing direction of the grounding nozzle.

[0057] The first sub-region preferably has a larger cross-section than the output section of the diffuser. Therefore, in this way, the flow cross-section increases in the flow direction of the flowing medium.

[0058] Advantageously, the second sub-region is connected to at least one nozzle device of the air replenishment device.

[0059] Advantageously, the second sub-region has a cross-section larger than the output section of at least one nozzle device. Therefore, the flow cross-section decreases in the flow direction of the flowing medium.

[0060] Preferably, the second sub-region has a funnel-shaped cross-section in a section transverse to the pushing direction of the grounding nozzle.

[0061] It can also be specified that the grounding nozzle includes a sealing edge, which is arranged opposite to at least one outlet of the air supply device, such that fluid flow is carried from at least one outlet in the direction of the suction opening or auxiliary fluid flows from at least one outlet to the suction opening.

[0062] It should be noted that the term "suction port edge" is preferably different from the term "sealing edge". One or more sealing edges of the grounding nozzle are advantageously used, on the one hand, to transport or assist fluid flow from at least one outlet of the replenishment air device toward the suction port of the grounding nozzle, and on the other hand, preferably to improve the formation of negative pressure in or below the grounding nozzle during operation.

[0063] The sealing edge may also surround at least one suction port edge and at least one outlet of the air supply device for supplying air outside at least one suction port edge. In this way, negative pressure can be generated not only within the suction port by the suction device, but also the negative pressure present at the suction port can act on at least one outlet.

[0064] Advantageously, the sealing edge is arranged on the rear edge region and / or the front edge region and on the first side edge region and the second side edge region of at least one suction port edge on the suction port edge.

[0065] Advantageously, the area enclosed by the sealing edge, especially the surrounding sealing edge, is larger than the area of ​​the suction opening, such that the sealing edge surrounds at least one suction port edge and provides at least one outlet of the air replenishment device for replenishing air outside the at least one suction port edge.

[0066] Furthermore, preferably, the sealing edge is constructed of rubber material or contoured protrusions on the bottom side of the grounding nozzle.

[0067] Preferably, the inlet of the air supply device has a polygonal shape, particularly a rectangular shape. This is easy to manufacture.

[0068] Preferably, the inlet can be controlled to close, so that the grounding nozzle according to the invention can be advantageously used on different ground coverings to advantageously set the required thrust.

[0069] Furthermore, preferably, the air replenishment device includes a push control device for manually and gradually opening and closing the inlet.

[0070] In other words, it is advantageous that the air supply device includes a push control device, which is implemented as a path control valve.

[0071] Advantageously, the actuation control device includes an actuation control element by which the cross-section of the inlet of the replenishing air device can be advantageously and gradually adjusted.

[0072] Furthermore, the actuation control element includes at least one locking protrusion for engaging with the locking receptacle.

[0073] Preferably, at least one locking protrusion is provided on the side of the push control element, particularly elastically. Thus, the locking protrusion can be locked in different predetermined positions on the locking receiver and can switch between these positions.

[0074] Advantageously, the push control device includes at least one locking receptacle for at least one locking protrusion. Preferably, the locking receptacle provides a plurality of predetermined positions or locking points for locking the at least one locking protrusion, at which the push control element or at least one locking protrusion of the push control element can be locked. Thus, the push control element can be locked in a plurality of positions relative to the locking receptacle, thereby determining the positions of both relative to each other.

[0075] It is also advantageous that at least one locking housing is formed by the housing of the grounding nozzle.

[0076] Furthermore, it is advantageous that the grounding nozzle includes a housing that forms a suction port, at least one suction port edge, an air supply device, an inlet or diffuser, and at least one outlet or at least one nozzle device.

[0077] Preferably, the shell structure is multi-piece.

[0078] Preferably, the air supply device includes a control for automatically opening and closing the inlet.

[0079] Preferably, the controller is implemented as a force-controlled valve.

[0080] Furthermore, preferably, the control device includes a sealing element through which the inlet can be opened and closed.

[0081] Preferably, the control device includes a stop element, and the closing element can abut against the stop element.

[0082] In addition, it can be specified that the stopping element is made of a magnetic or magnetizable material.

[0083] Enclosure elements can also be made of magnetizable or magnetic materials.

[0084] Advantageously, the closing element has a magnetic / magnetizable material, and the stopping element has a magnetizable / magnetic material, so that the two can attract each other and close the entrance.

[0085] Furthermore, it is advantageous that the magnetic force between the stop element and the sealing element can be predetermined, such that preferably, once the negative pressure in the suction port is greater than the magnetic force between the stop element and the sealing element, the sealing element opens the inlet, thereby replenishing air through the air replenishment device to the suction opening.

[0086] Furthermore, it is advantageous that the control device includes a spring element for applying a force to the closing element toward the stop element.

[0087] Alternatively, it can be specified that the spring element applies force to the sealing element at the position where the sealing element closes the inlet, and once the negative pressure in the suction port is greater than the pressure of the spring element, the sealing element opens the inlet to such an extent that supplementary air passes through the sealing element to the suction port.

[0088] Furthermore, the spring force of the spring element can be adjusted by a rotary control element, which is used to adjust the length of the spring element between the closing element and the rotary control element.

[0089] Preferably, the spring element is arranged between the rotation control element and the closing element.

[0090] Preferably, the rotation control element and the sealing element are connected to each other via a threaded connection.

[0091] Another advantage is that the cross-section of the rotary control element is cup-shaped.

[0092] In addition, it can be specified that the rotation control element includes an internal thread.

[0093] Advantageously, the closed element is screwed into the open side of the rotation control element.

[0094] Enclosure elements may also include external threads.

[0095] In another preferred embodiment, the control device of the force-controlled valve may be made of both a magnetic or magnetizable material and a spring element. This achieves higher precision in adjusting the valve to the working pressure of the grounded suction nozzle.

[0096] The above inventive concept will be further described in other ways below.

[0097] The present invention preferably—in a simplified manner—relates to a grounding nozzle having an air replenishment device, which allows for the cleaning of the ground by utilizing the ability to replenish air. Attached Figure Description

[0098] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. In the drawings:

[0099] Figure 1 A schematic cross-sectional view and a partially enlarged cross-sectional view of the grounding nozzle according to the present invention are shown;

[0100] Figure 2 Schematic illustration Figure 1 The figure shown is a perspective cross-sectional view of the grounding nozzle according to the present invention;

[0101] Figure 3 Schematic illustration Figure 1 A bottom view of the grounding nozzle according to the present invention; and

[0102] Figure 4 Schematic illustration of the relationship with Figure 1 A similar, but in another, embodiment of the grounding nozzle according to the invention, cross-sectional view.

[0103] List of reference numerals

[0104] 1 Grounding nozzle; 2 Suction port; 3 Suction port edge; 4 Suction opening; 5 Air replenishment device; 6 Inlet; 7 Outlet; 8 Front edge area; 9 Rear edge area; 10 First side edge area; 11 Second side edge area; 12 Fluid channel; 13 Diffusion device; 14 Nozzle device; 15 Fluid chamber; 16 Input part of diffusion device; 17 Output part of diffusion device; 18 Input part of nozzle device; 19 Output part of nozzle device; 20 First sub-region; 21 Second sub-region; 22 Sealing edge; 23 Push control device; 24 Push control element; 25 Locking protrusion; 26 Locking protrusion; 27 Locking receiving part; 28 Housing; 29 Control device; 30 Sealing element; 31 Stop element; 32 Spring element; 33 Rotation control element;

[0105] S indicates the direction of propulsion; U indicates the bottom side; O indicates the top side; P indicates the flow arrow. Detailed Implementation

[0106] In the following description, the same reference numerals are used for the same objects.

[0107] Figure 1 A cross-sectional view and a partially enlarged cross-sectional view of the grounding nozzle 1 according to the present invention are shown.

[0108] More specifically, Figure 1 A suction device for cleaning and / or caring for floor surfaces is shown, particularly a grounded nozzle 1 of a vacuum cleaner.

[0109] according to Figure 1 The grounding nozzle 1 includes a suction port 2, which has a suction port edge 3 disposed on the ground side (in... Figure 3 (As better shown in the image), the suction port edge 3 completely surrounds and defines the suction opening 4. Thus, the suction port edge 3 defines the suction opening 4.

[0110] In addition, the grounding nozzle 1 includes an air supply device 5, which is configured to supply air to the grounding nozzle 1, thereby reducing the pushing force required to drive the grounding nozzle 1.

[0111] In the operating state of the grounding nozzle 1, the air supply device 5 forms a fluid connection with the suction port 2 through the suction opening 4, allowing supply air to flow from the outlet 7 of the air supply device 5 into the suction opening 4 below the edge 3 of the suction port. In this operating state, the grounding nozzle 1 is in contact with the floor surface, and the suction device generates negative pressure in the suction port 2. This improves the cleaning ability of floor surfaces, especially carpeted floors, while simultaneously reducing the pushing force required to drive the grounding nozzle 1.

[0112] Therefore, the multiple outlets 7 of the supplemental air device 5 are fluidly connected to the suction opening 4 via the suction port edge 3, so that the supplemental air flowing out from the outlet 7 and sucked in by the suction port 2 can remove and carry away dirt particles from the ground surface, especially in the carpet.

[0113] In other words, Figure 1 The multiple outlets 7 and suction openings 4 of the air supply device 5 are shown arranged relative to each other so that a fluid flow of supply air can be established from the outlets 7 to the suction openings 4 below the suction port edge 3.

[0114] To explain the above, Figure 1 The flow arrow P is shown. When a negative pressure is generated in the suction port 2 or when it is in operation, the supplementary air flows along the flow arrow P from the inlet 6 to the outlet 7 and into the suction opening 4.

[0115] The following is a detailed description of the air replenishment device 5.

[0116] Therefore, the air replenishment device 5 has an inlet 6 for replenishing air and multiple outlets 7, wherein the outlets 7 for replenishing air are arranged outside the suction port edge 3, outside the suction port 2, and near the suction opening 4. In this way, the replenished air from the air replenishment device 5 can be used to pre-clean the ground surface and reduce the thrust.

[0117] In this case, the outlet 7 is arranged in the pushing direction S before the suction port edge 3 and before the suction port 2.

[0118] More precisely, the suction opening 4 and the outlet 7 of the air replenishment device 5 are oriented toward the bottom side U of the grounding nozzle 1 or the ground side, wherein the bottom side U and the ground surface to be cleaned can be arranged opposite each other.

[0119] In addition, the inlet 6 of the air replenishment device 5 is oriented toward the top side O of the grounding nozzle 1, wherein the top side O is away from the ground surface to be cleaned.

[0120] As previously described, the air replenishment device 5 has an inlet 6 for replenishing air and multiple outlets 7, with a fluid passage 12 between them.

[0121] Here, the fluid channel 12 connects the top side O of the grounding nozzle 1 to the bottom side U of the grounding nozzle 1.

[0122] Figure 2 It shows Figure 1 The figure shown is a perspective cross-sectional view of the grounding nozzle 1 according to the present invention.

[0123] Therefore Figure 2 As shown, the air replenishment device 5 includes a diffuser 13, multiple nozzle devices 14, and a fluid chamber 15 that together form the fluid channel 12.

[0124] Here, the diffusion device 13 has an input section 16 and an output section 17, wherein the input section 16 is formed by the inlet 6 of the air replenishment device 5.

[0125] from Figure 2 As can be easily seen, the input section 16 has a smaller cross-section than the output section 17, which enters the fluid chamber 15 of the air supply device 5. Therefore, the flow cross-section increases along the flow direction of the fluid medium, thereby slowing down or decelerating the flowing fluid or supply air.

[0126] As described above, the air replenishment device 5 has a plurality of nozzle devices 14, each of which includes an input section 18 and an output section 19.

[0127] Each output section 19 is formed by the outlet 7 of the air supply device 5, wherein the input section 18 has a larger cross-section than the output section 19. In this way, the flow cross-section decreases along the flow direction of the flow medium, thereby accelerating or speeding up the flowing fluid or the supplied air.

[0128] In summary, the output section 17 of the diffuser 13 is connected to the input section 18 of the nozzle device 14 via the fluid chamber 15.

[0129] In addition, Figure 2 The image shows the input section 18 of the mouth device 14 connected to the fluid chamber 15 of the air supply device 5.

[0130] like Figure 1 As shown, the fluid chamber 15 has a funnel-shaped cross-section in the section along the pushing direction S of the grounding nozzle 1, while the fluid chamber 15 has a rectangular cross-section in the section transverse to the pushing direction S of the grounding nozzle 1, as shown. Figure 2 As shown.

[0131] also, Figure 2 The cross-section shown in the pushing direction S transverse to the grounding nozzle 1 shows that the fluid chamber 15 has a first sub-region 20 and a second sub-region 21.

[0132] Here, the first sub-region 20 is positioned above the second sub-region 21 and connected to the diffusion device 13 of the air supply device 5.

[0133] As in Figure 2 As can be seen, the first sub-region 20 has a rectangular cross-section in a section transverse to the pushing direction S of the grounding nozzle 1, wherein the first sub-region 20 has a cross-section larger than the output portion 17 of the diffusion device 13.

[0134] On the other hand, the second sub-region 21 is connected to the nozzle device 14 of the air supply device 5 and has a larger cross-section than the output portion 19 of the nozzle device 14.

[0135] In the cross-section along the pushing direction S of the grounding nozzle 1, the second sub-region 21 has a funnel-shaped cross-section, just like the first sub-region 20 (see...). Figure 1 ).

[0136] For example, especially in Figure 2 As can be seen, the inlet 6 of the air supply device 5 has a rectangular shape and can be closed in a controllable manner.

[0137] In other words, the air supply device 5 has a push control device 23 for manually and gradually opening and closing the cross section of the inlet 6.

[0138] In this case, the push control device 23 includes a push control element 24 having two locking protrusions 25, 26 for engaging with the locking receptacle 27, and the push control device 23 also includes a locking receptacle 27 for locking the protrusions 25, 26.

[0139] When the two locking protrusions 25 and 26 are elastically disposed on the push control element 24 on the side, the locking receiving portion 27 has a plurality of locking points for engaging the locking protrusions 25 and 26. Therefore, the push control element 24 can be locked in multiple positions relative to the locking receiving portion 27, thereby determining the position of the two relative to each other.

[0140] from Figure 2 As can be seen, the push control element 24 is a single piece, and the locking housing 27 is formed by the housing 28 of the grounding nozzle.

[0141] The housing 28 of the grounding nozzle 1 is constructed in multiple parts and constitutes a suction port 2, a suction port edge 3, an air supply device 5, an inlet 6 or a diffuser 13, and an outlet 7 or a nozzle device 14.

[0142] Figure 3 It shows Figure 1 A bottom view of the grounding nozzle 1 according to the present invention.

[0143] exist Figure 3 As can be seen from the image, the suction port edge 3 has a front edge region 8, a rear edge region 9, a first side edge region 10, and a second side edge region 11 along the pushing direction S of the grounding suction nozzle 1.

[0144] The aforementioned edge regions 8, 9, 10, and 11 are connected to each other or form an integral suction port edge 3.

[0145] Here, the air replenishment device 5 is positioned in the pushing direction S of the grounding nozzle 1 before the front edge region 8 of the suction port edge 3, wherein all outlets 7 of the air replenishment device 5 are positioned before the front edge region 8 of the suction port edge 3.

[0146] In addition, Figure 3 As can be seen, the outlets 7 are arranged in rows and the rows of outlets 7 extend across the width of the grounding nozzle 1.

[0147] also, Figure 3 The grounding nozzle 1 is shown to include a surrounding sealing edge 22 within which a negative pressure can be generated by a suction device. The sealing edge 22 may also be discontinuous or composed of multiple segments. Importantly, sufficient negative pressure can be continuously generated during the operation of the suction device or the grounding nozzle. At least a portion of the sealing edge 22 may be formed by a portion of the suction port edge 3.

[0148] The sealing edge 22 surrounds the suction port edge 3 and the outlet 7 of the air replenishment device 5 for replenishing air outside the suction port edge 3, wherein the sealing edge 22 is preferably located near the rear edge region 9, the first side edge region 10 and the second side edge region 11 on the suction port edge 3.

[0149] Advantageously, compared to the suction opening 4, the surrounding sealing edge 22 surrounds a larger area, such that the sealing edge 22 surrounds the suction port edge 3 and the outlet 7 of the air replenishment device 5 for replenishing air, which is located outside the suction port edge 3.

[0150] Let me describe it in another way. Figures 1 to 3 .

[0151] according to Figure 1 and Figure 2 The grounding nozzle 1 is equipped with a controllable air supply opening 6 or inlet 6 or a drive control device 23.

[0152] The air vent 6 or the push control device 23 can open more or less depending on the ground cover. Locking components 25, 26, and 27 prevent unwanted displacement.

[0153] Figure 2A cut-out fluid channel 12 is shown, which delivers supplemental air to a small opening 7 or outlet 7 at the bottom side U in front of the grounded suction nozzle 1. The opening 7 is, in this case, implemented as a strip (Leiste).

[0154] The opening 7 or outlet 7 is located within the sealing edge 22 of the grounding nozzle 1, and a negative pressure can be generated within the sealing edge 22 by the suction device (see...). Figure 3 ).

[0155] like Figure 1 As indicated by the flow arrow P, the incoming replenishment air flows towards the bottom U through the fluid channel 12.

[0156] The incoming air serves two purposes: firstly, it reduces negative pressure or decreases propulsion; secondly, it allows air to be injected into the carpet or onto the floor surface through the nozzle device 14, causing dust particles to dislodge.

[0157] As mentioned earlier, reducing negative pressure results in a decrease in propulsion force. By adding air before suction port 2, it is possible to ensure improved cleaning efficiency, especially for carpeted floors, while ensuring that the propulsion force does not exceed an uncomfortable range.

[0158] Here, the supplemental air drawn in by the suction port 2 can remove and carry away dirt particles in the carpet or on the floor surface.

[0159] Furthermore, as described above, the cross-section of the opening 6 or inlet 6 or inlet 6 facing the carpet to be cleaned can be adjusted by means of the push control device 23.

[0160] Figure 4 It shows the relationship with Figure 1 A similar, but different, cross-sectional view of another embodiment of the grounding nozzle 1 according to the present invention.

[0161] Unless otherwise explicitly stated, refer to Figures 1 to 3 The embodiments described prior to the grounding nozzle 1 can also be used according to... Figure 4 Examples of implementations.

[0162] Therefore, the following only applies to... Figures 1 to 3 and Figure 4 The relevant differences between the two embodiments are explained.

[0163] therefore, Figure 4 As shown, instead of the push control device 23 for manually and gradually opening and closing the cross section of the inlet 6, the air supply device 5 has a control device 29 for automatically opening and closing the inlet 6.

[0164] The control device 29 has a closing element 30 through which the inlet 6 can be opened and closed.

[0165] In addition, the control device 29 has a stop element 31, and the closing element 30 can abut against the stop element.

[0166] According to Figure 4 In a particular embodiment, the closing element 30 has a magnetic material and the stopping element 31 has a magnetizable material, thereby enabling them to attract each other and close the entrance 6.

[0167] During operation, a working pressure of approximately 120 mbar is typically set in the area where the nozzle is located. The aforementioned magnetic force within the valve, under these conditions, causes the valve to yield and open the opening to atmospheric pressure when this working pressure is reached. Thus, as in... Figure 1 and Figure 4 As shown, air, or supplemental air, flows toward the carpeted floor through air channels. On one hand, this inflow of air serves to reduce the working pressure at that moment; on the other hand, the air is able to penetrate the carpet through the geometry of the air channels and remove dust particles.

[0168] Furthermore, the control device 29 may additionally include a spring element 32 for applying a force to the closing element 30 in the direction of the stop element 31. This is to support precise adjustment of the valve on the surface to be cleaned. Here, the force by the spring element 32 can be additionally supplemented by magnetic force, which is specifically reduced or supplemented by biasing or by releasing the spring in the spring element 32. However, in a preferred embodiment of the invention, the magnetic force can be omitted, so that the valve adjustment is achieved solely by the spring element 32.

[0169] The spring element 32 applies force to the sealing element 30 at the position where the sealing element 30 closes the inlet 6, and once the negative pressure in the suction port 2 is greater than the pressure of the spring element 32, the sealing element 30 opens the inlet 6 to such an extent that supplemental air passes through the sealing element 30 into the suction port 2.

[0170] Here, the spring force of the spring element 32 can be adjusted, for example, by a rotation control element 33, which is used to adjust the length of the spring element 32 between the closing element 30 and the rotation control element 33, wherein the spring element 32 is arranged between the rotation control element 33 and the closing element 30.

[0171] Although Figure 4 It is not easy to see, but the rotation control element 33 and the closing element 30 are connected to each other by a threaded connection.

[0172] Therefore, the cross-section of the rotary control element 33 is cup-shaped and has internal threads, while the closing element 30 is screwed into the open side of the rotary control element 33 with its external threads.

[0173] Let me describe it in another way. Figure 4 .

[0174] like Figure 4 As shown, the grounding nozzle 1 is equipped with a valve 29 and / or a control device 29 and an air passage 12 or a fluid passage 12.

[0175] Valve 29 has a sealing element 30 that blocks the passage to atmospheric pressure. Below the sealing element 30 is a spring element 32, which can be adjusted to increase or decrease its holding force.

[0176] In the area at the location of the grounding nozzle 1 that is at least surrounded by the sealing edge 22, an operating pressure of approximately 120 mbar is set during operation.

[0177] Here, the closing element 30, which works in conjunction with the spring element 32, is designed to yield and open the opening to atmospheric pressure when the working pressure is reached. Figure 4 As indicated by the flow arrow P, air is added or flows through the air passage or fluid passage 12 toward the bottom U.

[0178] This incoming air serves two purposes: firstly, it reduces the working pressure at that moment; secondly, it allows the supplementary air to be injected into the carpet or onto the floor surface through the nozzle-like geometry of outlet 7, thereby removing dirt such as dust particles.

[0179] As mentioned above, the reduction in working pressure leads to a decrease in pushing force. Therefore, it is possible to ensure improved cleaning efficiency on floor surfaces, such as carpeted floors, without the pushing force exceeding an uncomfortable range.

[0180] Furthermore, valve 29 or control device 29 can be adjusted for the floor surface to be cleaned. This is achieved by the spring force of the closing element 30 being affected by the spring element 32, and the closing force of the closing element 30 can be adjusted by the bias of the spring element 32.

Claims

1. A grounded suction nozzle (1) for a suction device used to clean floor surfaces, comprising: - A suction port (2) having at least one suction port edge (3) disposed on the ground side, the suction port edge completely or at least partially surrounding and defining the suction opening (4). - At least one sealing edge (22) is provided on the ground side, within which a negative pressure can be generated by a suction device, and - An air supply device (5) for supplying air to the grounding nozzle (1). It is characterized in that - The at least one sealing edge (22) surrounds the at least one suction port edge (3) and at least one outlet (7) of the air supply device (5) for supplying air, outside the at least one suction port edge (3). - The suction port edge is formed of one or more profiles, and wherein - In the operating state of the grounding nozzle (1), the air replenishment device (5) is fluidly connected to the suction port (2) through the suction opening (4), so that the replenished air flows into the suction opening (4) from at least one outlet (7) of the air replenishment device (5) below the edge (3) of the at least one suction port.

2. The grounding nozzle according to claim 1, characterized in that, - At least one outlet (7) of the air supply device (5) and the suction opening (4) are in fluid communication through the edge (3) of the at least one suction opening, so that the supplementary air flowing out from the at least one outlet (7) and sucked in by the suction opening (2) can detach and carry away dirt particles from the ground surface. - At least one outlet (7) of the air supply device (5) and the suction opening (4) are arranged relative to each other so that, in the operating state of the grounding nozzle, a fluid flow of supply air from the at least one outlet (7) to the suction opening (4) can be established below the edge (3) of the at least one suction port.

3. The grounding nozzle according to claim 1 or 2, characterized in that, - The air supply device (5) includes an inlet (6) for supplying air and at least one outlet (7). - At least one outlet (7) for replenishing air is arranged outside the edge (3) of the at least one suction port and near the suction opening (4), such that the replenishing air from the replenishing air device (5) can be used to pre-clean the ground surface and to reduce the thrust. - The at least one outlet (7) is arranged in the pushing direction (S) before the at least one suction port edge (3) and / or before the suction port (2), or the at least one outlet (7) is arranged in the pushing direction (S) after the at least one suction port edge (3) and / or after the suction port (2).

4. The grounding nozzle according to claim 1 or 2, characterized in that, -The at least one suction port edge (3) has a front edge region (8), a rear edge region (9), a first side edge region (10), and a second side edge region (11). - The air supply device (5) is arranged in the pushing direction (S) of the grounding nozzle (1) before the front edge region (8) of the at least one suction port edge (3). - At least one outlet (7) of the air supply device (5) is arranged along the pushing direction (S) before the front edge region (8) or after the rear edge region (9) of the at least one suction port edge (3). - All outlets (7) of the air supply device (5) are located before the front edge region (8) or after the rear edge region (9) of the at least one suction port edge (3).

5. The grounding nozzle according to claim 1 or 2, characterized in that, - At least one outlet (7) of the suction opening (4) and the air replenishment device (5) is oriented toward the bottom (U) or ground side of the grounding nozzle (1). -The bottom side (U) and the ground surface to be cleaned can be arranged opposite each other. - The inlet (6) of the air supply device (5) is oriented toward the top side (O) of the grounding nozzle (1). - The inlet (6) of the air replenishment device (5) is oriented toward the bottom (U) of the grounding nozzle (1) or toward the side area of ​​the grounding nozzle (1).

6. The grounding nozzle according to claim 1 or 2, characterized in that, - The air supply device (5) includes an inlet (6) for supplying air and at least one outlet (7). - The air supply device (5) has at least one fluid passage (12) between the inlet (6) and the at least one outlet (7). - The at least one fluid channel (12) connects the top side (O) of the grounding nozzle (1) to the bottom side (U) of the grounding nozzle (1). - The air replenishment device (5) includes a diffuser (13) and / or at least one nozzle device (14) and / or a fluid chamber (15) that together constitute the at least one fluid channel (12).

7. The grounding nozzle according to claim 1 or 2, characterized in that, -The air replenishment device (5) includes a diffusion device (13), - The diffusion device (13) includes an input section (16) and an output section (17). - The input section (16) is formed by the inlet (6) of the air supply device (5). -The input section (16) has a smaller cross-section than the output section (17). - The output section (17) is introduced into the fluid chamber (15) of the air replenishment device (5).

8. The grounding nozzle according to claim 1 or 2, characterized in that, -The air supply device (5) includes at least one nozzle device (14), - The at least one mouth device (14) includes an input section (18) and an output section (19). - The output section (19) is composed of at least one outlet (7) of the air supply device (5). -The input section (18) has a larger cross-section than the output section (19). - The input section (18) is connected to the fluid chamber (15) of the air supply device (5).

9. The grounding nozzle according to claim 6, characterized in that, -The air replenishment device (5) includes a fluid chamber (15), - The fluid chamber (15) has a funnel-shaped cross-section in the section along the pushing direction (S) of the grounding nozzle (1). - The fluid chamber (15) has a rectangular cross-section in a section transverse to the pushing direction (S) of the grounding nozzle (1). - The output (17) of the diffusion device (13) is connected to the input (18) of the at least one mouth device (14) via the fluid chamber (15).

10. The grounding nozzle according to claim 9, characterized in that, -The fluid chamber (15) has a first sub-region (20) and a second sub-region (21) in a cross-section transverse to the pushing direction (S) of the grounding nozzle (1). - The first sub-region (20) is arranged on top of the second sub-region (21).

11. The grounding nozzle according to claim 10, characterized in that, - The first sub-region (20) is connected to the diffusion device (13) of the air supply device (5). -The first sub-region (20) has a rectangular cross-section in a section transverse to the pushing direction (S) of the grounding nozzle (1). - The first sub-region (20) has a larger cross-section than the output portion (17) of the diffusion device (13).

12. The grounding nozzle according to claim 10, characterized in that, - The second sub-region (21) is connected to at least one mouthpiece (14) of the air supply device (5). - The second sub-region (21) has a larger cross-section than the output portion (19) of the at least one mouth device (14). - The second sub-region (21) has a funnel-shaped cross-section in a section transverse to the pushing direction (S) of the grounding nozzle (1).

13. The grounding nozzle according to claim 1 or 2, characterized in that, - At least a portion of the sealing edge (22) is formed by the at least one suction port edge (3).

14. The grounding nozzle according to claim 1 or 2, characterized in that, - The inlet (6) of the air supply device (5) has a polygonal shape. -The inlet (6) can be closed in a controllable manner. -The air supply device (5) has a push control device (23) for manually and gradually opening and closing the cross section of the inlet (6), -The drive control device (23) includes a drive control element (24), - The push control element (24) includes at least one locking protrusion (25, 26) for engaging with the locking receiver (27). - The at least one locking protrusion (25, 26) is disposed laterally on the push control element (24). - The push control device (23) includes at least one locking receiving portion (27) for the at least one locking protrusion (25, 26), - The at least one locking receiving part (27) is formed by the housing (28) of the grounding nozzle (1).

15. The grounding nozzle according to claim 3, characterized in that, - The air supply device (5) includes a control device (29) for automatically opening and closing the inlet (6). - The control device (29) includes a closing element (30) through which the inlet (6) can be opened and closed. The control device (29) includes a stop element (31), and the closing element (30) is capable of abutting against the stop element. - The closing element (30) has a magnetic / magnetizable material and the stopping element (31) has a magnetizable / magnetic material, so that the two can attract each other and close the entrance (6). - The magnetic force between the stop element (31) and the sealing element (30) is predetermined, such that once the negative pressure in the suction port (2) exceeds the magnetic force between the stop element (31) and the sealing element (30), the sealing element (30) opens the inlet (6), thereby replenishing air through the air replenishment device (5) to the suction opening (4). - The control device (29) includes a spring element (32) for applying a force to the closing element (30) toward the stopping element (31). -The spring element (32) applies force to the sealing element (30) at the position where the sealing element (30) closes the inlet (6), and once the negative pressure in the suction port (2) is greater than the pressure of the spring element (32), the sealing element (30) opens the inlet (6) to such an extent that supplementary air passes through the sealing element (30) into the suction port (2). The spring force of the spring element (32) can be adjusted by a rotation control element (33), which is used to adjust the length of the spring element (32) between the closing element (30) and the rotation control element (33). - The spring element (32) is arranged between the rotation control element (33) and the closing element (30). The rotation control element (33) and the closing element (30) are connected to each other by a threaded connection.

16. The grounding nozzle according to claim 1, characterized in that, The suction device is a vacuum cleaner.

17. The grounding nozzle according to claim 2, characterized in that, The supplemental air drawn in through the suction port (2) causes dirt particles from the carpet to detach and be carried away.

18. The grounding nozzle according to claim 3, characterized in that, The at least one outlet (7) is arranged outside the suction port (2).

19. The grounding nozzle according to claim 14, characterized in that, The inlet (6) of the air supply device (5) has a rectangular shape. The at least one locking protrusion (25, 26) is elastically disposed on the side of the push control element (24).

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