Nozzle attachment, suction nozzle, cleaning hose and cleaning device

Abstract

The invention relates to a nozzle attachment for a handpiece of a cleaning device, in particular for a handpiece of a spray extraction device or a steam vacuum cleaner, wherein the nozzle attachment comprises a nozzle suction channel and a nozzle fluid channel which is fluidically separated therefrom, wherein the nozzle fluid channel has a fluid outlet on the distal side for discharging a cleaning fluid and wherein the nozzle suction channel has a suction channel inlet on the distal side for receiving the dirty liquor, characterised in that the nozzle attachment comprises at least one cleaning element and in that the fluid outlet and the suction channel inlet are spatially separated from one another by the at least one cleaning element to form a fluid outlet region and a separate suction channel inlet region. The invention also relates to an improved suction nozzle, an improved cleaning hose and an improved cleaning device.

Description

[0001] Nozzle attachment, suction nozzle, cleaning hose and cleaning device

[0002] The present invention relates to a nozzle attachment for a handpiece of a cleaning device, in particular for a handpiece of a spray extraction device or a steam cleaner, wherein the nozzle attachment comprises a nozzle suction channel and a nozzle fluid channel fluidically separated therefrom, wherein the nozzle fluid channel comprises a fluid outlet on the distal side for dispensing a cleaning fluid and wherein the nozzle suction channel comprises a suction channel inlet on the distal side for receiving a dirty water solution.

[0003] Furthermore, the present invention relates to a suction nozzle for a cleaning device, in particular for a spray extraction device or a steam cleaner, which suction nozzle comprises a handpiece and a nozzle attachment.

[0004] Furthermore, the present invention relates to a cleaning hose for a cleaning device, in particular for a spray extraction device or a steam cleaner, wherein the cleaning hose comprises a hose suction channel with a first and a second hose suction channel end and a hose fluid channel with a first and a second hose fluid channel end, wherein the first hose suction channel end and the first hose fluid channel end are connected or connectable to a handpiece of a suction nozzle.

[0005] The present invention also relates to a cleaning device, in particular in the form of a spray extraction device or a steam cleaner, comprising a suction device, a conveying device, a suction connection, and a cleaning fluid connection, wherein the suction device is fluidly connected to the suction connection, wherein the conveying device is fluidly connected to the cleaning fluid connection, wherein the cleaning device further comprises a cleaning hose that is connected or connectable to both the suction connection and the cleaning fluid connection. Nozzle attachments, suction nozzles, cleaning hoses, and cleaning devices of the type described above are known, for example, from the unpublished German patent application 10 2022 111 008.7. The nozzle attachments described therein can be used to effectively clean large areas, such as carpets and large-area upholstery on furniture or the like.

[0006] A floor care machine is known from DE 16 28 859 A. AT 388 863 B discloses a device for cleaning surfaces. EP 3 205 252 A1 describes cleaning devices and cleaning apparatuses.

[0007] However, the known nozzle attachments are unsuitable for cleaning small objects made of textile material, such as shoes.

[0008] It is therefore an object of the present invention to improve a nozzle attachment, a suction nozzle, a cleaning hose and a cleaning device of the type described above in such a way that, in particular, even small objects such as shoes can be cleaned easily and effectively.

[0009] This object is achieved according to the invention in a nozzle attachment of the type described at the outset in that the nozzle attachment comprises at least one cleaning element and that the fluid outlet and the suction channel inlet are spatially separated from one another by the at least one cleaning element in order to form a fluid outlet region and a suction channel inlet region separate therefrom.

[0010] A nozzle attachment developed as proposed enables, in particular, simple and clean cleaning of shoes, textiles, or even solid surfaces, especially small objects and / or curved and / or vertical surfaces. In particular, car seats, upholstered furniture, strollers, clothing, and even carpets can be optimally cleaned with such a nozzle attachment. Cleaning fluid can be applied to the fluid outlet area using the nozzle attachment. By moving the nozzle attachment with the cleaning element over the surface exposed to the cleaning fluid, not only loosens dirt with the cleaning fluid but also mechanically treats the object to be cleaned.If the nozzle attachment is moved further over the surface area to which a cleaning fluid was applied, the applied cleaning fluid together with the collected dirt, i.e. the so-called dirty water, can be sucked through the suction channel inlet area into the suction channel inlet. With the nozzle attachment, a cleaning fluid can be applied to the object to be cleaned and immediately after the dirt has been loosened and the surface to be cleaned has been mechanically treated, it can be sucked away with at least one cleaning element. With a corresponding geometric design of the nozzle attachment in the area of ​​its distal end, i.e. depending on the design of the fluid outlet area and the suction channel inlet area, an object can be cleaned without cleaning fluid being undesirably distributed in the area surrounding the object to be cleaned.For example, if the size of a distal end region of the nozzle attachment is adjusted accordingly, small objects such as shoes can be cleaned without cleaning fluid dripping from the shoe. For optimal cleaning, the at least one cleaning element is elastic and / or flexible in order to be able to adapt to the surface to be cleaned. In contrast to nozzle attachments whose distal ends are injection-molded from a hard plastic material, soiling on an object to be cleaned can be loosened not only by the cleaning fluid, but also mechanically with the at least one cleaning element, so that loosened dirt can be sucked off the object to be cleaned as part of the dirty water using the nozzle attachment. The nozzle attachment can in particular be designed to be guided with one hand.For this purpose, it can be ergonomically designed to allow for comfortable and joint-friendly operation for the user, allowing them to clean objects with the nozzle attachment even for extended periods. Preferably, the cross-sectional area defined by the fluid outlet area has a value in the range of approximately 0.5 cm. 2 up to about 5 cm 2 In particular, it can be used in a range of about 1 cm 2 up to about 2 cm 2This fluid outlet surface area can be surrounded by at least one cleaning element, as described, in order to separate it from the suction channel outlet area. The specified surface sizes of the fluid outlet area enable, in particular, the cleaning of objects with relatively small and non-flat surfaces, such as shoes. This allows the cleaning fluid to be applied specifically only in the fluid outlet surface area. The cleaning fluid used can be, in particular, a cleaning liquid, for example water with and without chemical cleaning additives, a cleaning vapor, for example water vapor with and without chemical cleaning additives, or a liquid-vapor mixture with and without chemical cleaning additives.

[0011] It is advantageous if the suction channel inlet and the fluid outlet are arranged adjacent to one another and if the at least one cleaning element only partially or sectionally delimits the fluid outlet region and the suction channel inlet region. Such an arrangement can be realized, for example, in that the fluid outlet region and the suction channel inlet region are separated from one another by a linear or rectilinear cleaning element. The cleaning element can be either straight or curved. However, it is only designed in such a way that the fluid outlet and suction channel inlet regions, each delimited by a self-contained edge, are only partially delimited, i.e. sectionally, by the at least one cleaning element. For example, two semicircular surface regions can be separated from one another by a rectilinear cleaning element.Alternatively, two rectangular, adjacent surface areas can be separated from each other by a straight cleaning element. Nozzle attachments designed as described enable unidirectional work. With this design, the nozzle attachment should ideally be moved over the object to be cleaned in such a way that, after the cleaning fluid has been applied, the surface to be cleaned immediately comes into contact with the at least one cleaning element. By continuing to move the nozzle attachment, the applied cleaning fluid, together with the dirt dissolved and absorbed in the cleaning fluid, can be sucked away as a dirty water via the suction channel inlet area into the suction channel. Such a nozzle attachment is not useful in the opposite direction, since the applied cleaning fluid would then remain on the object to be cleaned when the object is being processed.With this procedure, which is not recommended, the area is first vacuumed, cleaned with the cleaning element and then cleaning fluid is applied, which can then no longer be vacuumed.

[0012] According to a further preferred embodiment of the invention, it can be provided that the suction channel inlet is designed in a closed ring shape and surrounds the fluid outlet. In particular, the suction channel inlet can concentrically surround the fluid outlet. Such a configuration has the particular advantage that an object to be cleaned can be cleaned in any direction using such a nozzle attachment. If cleaning fluid is applied from the cleaning fluid outlet in the fluid outlet region to the object to be cleaned, this region, for example the central region, of the nozzle attachment is separated from the suction channel inlet region by the at least one cleaning element. Thus, the at least one cleaning element surrounds the fluid outlet region, in particular completely.If cleaning fluid is applied using such a nozzle attachment, the nozzle attachment can be moved in any direction over the object to be cleaned. After passing over the area of ​​the object to be cleaned onto which cleaning fluid was applied, at least one cleaning element is first moved over this moistened surface area of ​​the object to be cleaned. Then, immediately afterwards, the self-contained, ring-shaped suction channel inlet area passes over the surface of the object to be cleaned that has been treated with the at least one cleaning element. This means that the user can hold the nozzle attachment in any position. The user does not have to worry about which direction to move the nozzle attachment over the object to be cleaned.The cleaning of the object then always proceeds according to the same principle, namely applying cleaning fluid to the object to be cleaned, mechanically loosening the dirt by moving the nozzle attachment over the moistened surface with at least one cleaning element and then collecting the dirty water directly in the suction channel inlet area and sucking it out through the suction channel inlet.

[0013] It is advantageous if the inner and / or outer boundaries of the annular suction channel inlet are oval, circular, polygonal, especially triangular, square, or pentagonal. The inner and outer boundaries can be geometrically similar, for example, both circular, or geometrically dissimilar, for example, an inner boundary circular and an outer boundary triangular or rectangular. This allows nozzle attachments to be optimized for different applications.

[0014] It is advantageous if the at least one cleaning element is designed to be fluid-permeable. In particular, it can be designed to be gas- and / or liquid-permeable. This makes it possible, in particular, to reliably and completely suction away cleaning fluid that has been applied to an object to be cleaned. Fluid permeability can be achieved, in particular, if the at least one cleaning element is designed with or comprises bristles or a sponge-like element.

[0015] Advantageously, the at least one cleaning element is designed in a closed, annular manner and surrounds the fluid outlet. Such a configuration makes it possible, in particular, to completely define the fluid outlet area with the at least one cleaning element. Cleaning fluid can be applied from the fluid outlet to an object to be cleaned only within the fluid outlet area defined by the at least one cleaning element.

[0016] The nozzle attachment can be designed simply and cost-effectively if the at least one cleaning element is brush-like and comprises a plurality of bristles and / or bristle bundles. The plurality of bristles can be made of any material. In particular, depending on the intended use of the nozzle attachment, the bristles can be harder or softer, more or less flexible, elastic or essentially inelastic.

[0017] It is advantageous if the at least one cleaning element is designed in the form of a ring brush with a self-contained, annular bristle ring. Such a ring brush can, in particular, be designed separately from the nozzle attachment and then replaced depending on the intended use of the nozzle attachment or when it becomes worn. Such a ring of bristle can, in particular, optimally demarcate the fluid outlet area from the suction channel inlet area in a ring-shaped manner.

[0018] It is advantageous if the bristles define a bristle longitudinal direction, if the fluid outlet defines a fluid outlet longitudinal axis, and if the bristle longitudinal direction and the fluid outlet longitudinal axis are aligned parallel or substantially parallel to each other. This arrangement makes it possible, in particular, to apply cleaning fluid from the fluid outlet to the object to be cleaned in the fluid outlet area without, if possible, directly impinging on the bristles. This can, in particular, improve the efficiency of the cleaning action of the nozzle attachment.

[0019] It is advantageous if the at least one cleaning element comprises a carrier and if the plurality of bristles is arranged or formed on the carrier. This configuration makes it possible, in particular, to replace the carrier with the plurality of bristles if necessary when the bristles are worn or when other bristles, for example, softer or harder bristles, are to be used preferentially for a specific cleaning purpose.

[0020] The nozzle attachment can be easily designed if the carrier is ring-shaped or sleeve-shaped and surrounds the fluid outlet. In particular, a central area of ​​the nozzle attachment in the area of ​​the fluid outlet can be designed to be rotationally symmetrical or essentially rotationally symmetrical. Furthermore, the carrier with the bristles arranged thereon can be handled easily and reliably, for example, to replace it with another carrier with different bristles.

[0021] In order to be able to apply cleaning fluid specifically to the surface to be cleaned, it is advantageous if the fluid outlet protrudes distally beyond a distal boundary edge of the carrier.

[0022] Conveniently, the fluid outlet comprises a nozzle. The nozzle can be designed, in particular, to apply a cleaning fluid mist or a cleaning fluid spray to the surface to be cleaned. Preferably, the nozzle is designed to distribute the cleaning fluid in fine droplets, thus achieving a particularly good cleaning effect. In particular, the formation of cleaning fluid stains on the object to be cleaned can be avoided or substantially avoided.

[0023] The nozzle attachment can be designed compactly if the nozzle and the nozzle attachment are formed integrally, particularly monolithically. For example, the nozzle attachment can be formed by injection molding. The nozzle can then be formed in a single operation, thus avoiding subsequent joining and thus an additional production step in the nozzle attachment's manufacture.

[0024] Alternatively, it is advantageous if the nozzle is designed as a separate component and can be detachably connected to a distal end of the nozzle fluid channel. In particular, it can be designed so that it can be screwed or locked to the distal end of the nozzle fluid channel. Such a design makes it possible, in particular, to form the nozzle from a different material than the nozzle fluid channel or the nozzle attachment. For example, the nozzle can be formed from a metallic material.

[0025] According to a further preferred embodiment of the invention, it can be provided that the fluid outlet defines a free fluid outlet cross-section, that the suction channel inlet defines a free suction channel inlet cross-section, and that a ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section lies in a range from approximately 1 / 100 to approximately 1 / 20, in particular in a range from 1 / 100 to approximately 1 / 50. A cross-sectional area ratio in the specified ranges makes it possible, in particular, to clean objects in such a way that no excessive wetting with cleaning fluid occurs. In particular, this can ensure that the cleaning fluid applied to the object to be cleaned can be completely sucked away through the suction channel inlet.

[0026] Furthermore, it is advantageous if a sealing element is arranged or formed on the distal side of the nozzle attachment, protruding in the distal direction and surrounding the fluid outlet region and the suction channel inlet region. Such a sealing element has the particular advantage of enabling optimal adaptation of the nozzle attachment to a contour of the object to be cleaned. Furthermore, it can also minimize the ingress of false air into the distal end region of the nozzle attachment. The sealing element can, for example, be directly adjacent to both the fluid outlet region and the suction channel inlet region. In alternative embodiments, the sealing element can only be adjacent to the suction channel inlet region, which in turn is separated from the fluid outlet region exclusively by the at least one cleaning element.In order to achieve the best possible cleaning effect with the nozzle attachment, it is advantageous if the at least one cleaning element protrudes beyond the sealing element on the distal side and points in the distal direction. This is particularly advantageous in a working position in which the sealing element is deformed, for example slightly deformed or retracted in the proximal direction, or also in a basic position in which the sealing element is undeformed. This ensures that the cleaning element can come into direct contact with the surface to be cleaned before the sealing element comes into contact with the surface to be cleaned. If the at least one cleaning element is correspondingly deformable, an optimal mechanical cleaning effect can be achieved with the at least one cleaning element. Ideally, the cleaning element protrudes at least approximately 0.5 mm beyond the sealing element on the distal side.It is advantageous if it protrudes no more than 3 mm beyond the sealing element. This allows for both a seal with the sealing element and reliable mechanical cleaning of the object to be cleaned with at least one cleaning element.

[0027] Preferably, the sealing element borders exclusively on the suction channel inlet area. Such a configuration is particularly desirable when the suction channel inlet area is formed by a closed, annular suction channel inlet that surrounds the fluid outlet in a ring. The suction channel inlet area is then bounded centrally, i.e., internally, by at least one cleaning element, and externally by the sealing element.

[0028] To enable particularly good adaptation of the nozzle attachment to the surface to be cleaned, it is advantageous if the sealing element is designed to be deformable. In particular, it can be flexible and / or elastic. For this purpose, it can be made, for example, from appropriately suitable materials, such as rubber or an elastically deformable plastic. The sealing element is preferably designed in the form of a sealing lip. The sealing element can thus, in particular, be sleeve-shaped with a correspondingly thin wall thickness, which enables flexible and / or elastic deformation of the sealing element, namely the sealing lip.

[0029] To optimally seal the suction channel inlet area, the sealing element is preferably sleeve-shaped and extends parallel or substantially parallel to the fluid outlet longitudinal axis. In particular, the sealing element can be arranged or configured concentrically to the fluid outlet longitudinal axis. The sealing element can, in particular, be arranged at the suction channel inlet in a force-fitting and / or form-fitting manner. Optionally, a material connection, for example, by gluing or welding, can also be provided.

[0030] Advantageously, the sealing element is designed to be detachably connected to the nozzle attachment. In particular, a force-locking and / or positive connection can be provided. This allows the sealing element to be replaced if necessary, for example, if it is damaged or worn, or if a different degree of flexibility of the sealing element is desired, for example, in conjunction with another cleaning element.

[0031] Furthermore, it may be advantageous if the sealing element and the at least one cleaning element each form a closed boundary of the suction channel inlet area formed between them. In particular, the closed boundary formed by the at least one cleaning element can be at least partially fluid-permeable, for example, if the at least one cleaning element is formed by a plurality of bristles or bristle bundles.

[0032] Furthermore, it is advantageous if the sealing element defines a sealing element edge on the distal side, if the at least one cleaning element defines a cleaning element end on the distal side, and if the cleaning element end protrudes beyond the sealing element edge on the distal side. This makes it possible for the cleaning element end to come into contact with the surface to be cleaned before the sealing element edge touches the surface to be cleaned. This can ensure mechanical cleaning of the surface to be cleaned, for example, by appropriate deformation of the at least one cleaning element until the sealing element edge comes into contact with the surface to be cleaned, thus enabling sealing of the nozzle attachment relative to the surface to be cleaned.

[0033] To ensure optimal cleaning of flat surfaces, it is advantageous if the sealing element edge defines an edge plane. This edge plane can be transverse to the fluid outlet longitudinal axis, particularly perpendicular, or even inclined relative to it, depending on the intended application of the nozzle attachment.

[0034] Preferably, the edge plane runs transversely, in particular perpendicularly, to the fluid outlet longitudinal axis. Depending on the design of the nozzle attachment, this can enable particularly ergonomic handling, for example, if the edge plane is inclined relative to the fluid outlet longitudinal axis.

[0035] Furthermore, it is advantageous if the sealing element has a sealing element length parallel to the fluid outlet longitudinal axis, if the at least one cleaning element has a cleaning element length parallel to the fluid outlet longitudinal axis, and if the cleaning element length is greater than the sealing element length. This ensures, in particular, that a distal-side cleaning element end protrudes beyond the sealing element on the distal side, in particular beyond a sealing element edge.

[0036] According to a further preferred embodiment of the invention, it can be provided that the at least one cleaning element has a cleaning element end surface on the distal side, and that the cleaning element end surface defines an end surface plane that runs transversely, in particular perpendicularly, to a fluid outlet longitudinal axis of the fluid outlet. As already explained, an optimal cleaning effect can thus be achieved by means of the at least one cleaning element on the surface to be cleaned.

[0037] Preferably, the cleaning element end surface is defined by distally facing end surfaces of the free ends of the plurality of bristles. This enables optimal cleaning of textile fabrics, especially when the bristles have correspondingly small diameters, allowing them to penetrate as deeply as possible into the fabric.

[0038] It is advantageous if the edge plane and the end surface plane run parallel to each other, and if the end surface plane runs distally from the edge plane. This configuration makes it possible, in particular, to place the nozzle attachment with the at least one cleaning element and the sealing element parallel to the surface to be cleaned and to move the nozzle attachment accordingly parallel to itself relative to the surface to be cleaned.

[0039] For optimal cleaning results, it is advantageous if the edge plane and the end surface plane are spaced apart, and if the distance has a value in a range of approximately 0.5 mm to approximately 3 mm. In particular, the distance can have a value of approximately 1 mm. The specified dimensioning of a distance has the particular advantage of achieving both a good cleaning effect with the at least one cleaning element on the one hand and the best possible seal with the sealing element on the other.

[0040] Preferably, the at least one cleaning element is designed to be detachably connectable to the nozzle attachment. This allows it to be replaced as needed, for example, when it is worn or when a different type of cleaning element is preferred for a specific cleaning purpose.

[0041] The cleaning effect of the nozzle attachment can be further improved, in particular, by arranging or embodying at least one cleaning element on the nozzle attachment in a movable manner, in particular with a drive. This eliminates the need for the user to manually move the nozzle attachment over the surface to be cleaned; instead, a relative movement between the at least one cleaning element and the surface to be cleaned is achieved by the drive.

[0042] It is advantageous if the nozzle attachment comprises a drive for moving the nozzle attachment or parts thereof, in particular for moving the at least one cleaning element. In particular, the drive can be designed in the form of an oscillation, rotation, or vibration drive. For example, the drive can comprise an electric motor coupled to the at least one cleaning element in order to move it relative to the nozzle attachment. Or the drive is arranged and designed to move the nozzle attachment relative to a handpiece to which the nozzle attachment is coupled. Thus, for mechanical cleaning, a user does not have to move the nozzle attachment over the surface to be cleaned, but only hold it against it.

[0043] According to a further preferred embodiment of the invention, it can be provided that the nozzle attachment is angled and comprises a distal and a proximal nozzle attachment section, that the fluid outlet and the suction channel inlet are arranged or formed on the distal nozzle attachment section, that the proximal nozzle attachment section is connected or connectable to a handpiece, and that the distal and proximal nozzle attachment sections are angled relative to one another. Such an angled design of the nozzle attachment enables, in particular, ergonomic working with the nozzle attachment. For example, the nozzle attachment can be grasped with one hand in the area of ​​the proximal nozzle attachment section. The distal nozzle attachment section, which is inclined relative to this, can then be brought closer to the surface to be cleaned without the user having to work with an excessively bent wrist.It is advantageous if the proximal nozzle attachment section defines a proximal nozzle attachment section longitudinal axis and the distal nozzle attachment section defines a distal nozzle attachment section longitudinal axis, if the proximal nozzle attachment section longitudinal axis and the distal nozzle attachment section longitudinal axis enclose a bending angle, and if the bending angle has a value in a range of approximately 90° to 180°. In particular, the bending angle can be in a range of approximately 125° to 155°. Depending on the application or intended use of the nozzle attachment, optimal ergonomic handling for the user can be achieved with bending angles within the specified range.

[0044] The nozzle attachment can be designed particularly simply and cost-effectively if it is made of a plastic. In particular, the at least one cleaning element can be made of a plastic. For example, a housing of the nozzle attachment can be defined by the nozzle attachment suction channel, which forms an outer shell of the nozzle attachment.

[0045] The object stated at the outset is further achieved according to the invention in a suction nozzle of the type described at the outset in that the nozzle attachment is designed in the form of one of the nozzle attachments described above.

[0046] Designing or equipping a suction nozzle with one of the nozzle attachments described above has the advantages already described above in connection with preferred embodiments of nozzle attachments.

[0047] According to one embodiment, the nozzle attachment can be permanently connected to the handpiece. In particular, the nozzle attachment can be formed integrally with the handpiece. It is advantageous if the handpiece and the nozzle attachment are designed to be detachably connectable to one another. Thus, depending on the cleaning task to be solved, the most suitable nozzle attachment can be coupled to the handpiece. For example, the handpiece can be designed to control the release of cleaning fluid. For this purpose, a valve device can be arranged or formed on the handpiece, which interacts with a conveying device of a cleaning device, for example, in a control-effective manner.

[0048] To improve the handling of the suction nozzle, it is advantageous if the nozzle attachment on the handpiece is arranged or designed to be rotatable. Particularly if the nozzle attachment is angled, a distal end of the nozzle attachment, i.e., the suction channel inlet or fluid channel outlet, can be rotated in a desired direction while maintaining the same hand position.

[0049] The object stated at the outset is further achieved according to the invention in a cleaning hose for a cleaning device of the type described at the outset in that the suction nozzle is designed in the form of one of the suction nozzles described above.

[0050] A cleaning hose designed in this way then has the advantages already described above in connection with preferred embodiments of suction nozzles.

[0051] It is advantageous if the second hose suction channel end is or can be fluidly connected to a suction connection of the cleaning device, and if the second hose fluid channel end is or can be fluidly connected to a fluid connection of the cleaning device. This configuration makes it possible, in particular, to convey a cleaning fluid, which is held, for example, in a container provided for this purpose on the cleaning device, through the hose fluid channel to the fluid outlet on the nozzle attachment using a conveying device, and to suck the dirty water through the hose suction channel and then through the suction connection of the cleaning device into a dirty water container of the cleaning device.

[0052] The object posed at the outset is further achieved in a cleaning device of the type described above in that the cleaning hose is designed in the form of one of the cleaning hoses described above. The cleaning device then has the advantages already described above in connection with preferred embodiments of cleaning hoses.

[0053] It is advantageous if the cleaning device includes a control device for controlling the delivery device to activate and deactivate fluid delivery. This allows a user to apply a cleaning fluid to the surface to be cleaned in a targeted manner. For example, a valve device or a control element can be arranged or configured on a handle of the suction nozzle to activate or deactivate the delivery device, thus delivering cleaning fluid through the fluid outlet onto the surface to be cleaned as needed, or to prevent fluid delivery.

[0054] It is advantageous if the nozzle attachment comprises a sensor, in particular a touch sensor and / or a pressure sensor, and if the control device is connected to the sensor in a control-effective manner for automatically starting fluid dispensing when the sensor is actuated. Such a development particularly simplifies handling of the cleaning device, since a user does not have to actively control or activate the fluid dispensing. By appropriately handling the nozzle attachment, the proposed development causes fluid dispensing to begin automatically, for example, when a negative pressure limit in the nozzle suction channel is undershot or when the nozzle attachment touches the surface to be cleaned. This can be detected using a pressure sensor or a touch sensor.

[0055] The following description of a preferred embodiment of the invention serves to explain it in more detail in conjunction with the drawings. They show:

[0056] Figure 1: a schematic perspective, partially broken away overall view of a cleaning device in the form of a spray extraction device; Figure 2: a schematic perspective view of a

[0057] Suction nozzle coupled to the cleaning hose when cleaning a shoe;

[0058] Figure 3: a schematic perspective view of another embodiment of a suction nozzle connected to a cleaning hose when cleaning a seat;

[0059] Figure 4: a schematic perspective view of a first embodiment of a nozzle attachment, as shown by way of example in Figure 3;

[0060] Figure 5: a view of the arrangement of Figure 4 in the direction of arrow A;

[0061] Figure 6: a schematic sectional view along line 6-6 in Figure 5;

[0062] Figure 7: a schematic perspective, partially broken view of a second embodiment of a nozzle attachment;

[0063] Figure 8: a view of the arrangement of Figure 7 in the direction of arrow B;

[0064] Figure 9: a schematic sectional view along line 9-9 in Figure 8;

[0065] Figure 10: a perspective, partially broken view of a third embodiment of a nozzle attachment, as shown by way of example in Figure 2;

[0066] Figure 11: a view of the arrangement of Figure 10 in the direction of arrow C;

[0067] Figure 12: a sectional view taken along line 12-12 in Figure 11; Figure 13: a perspective, partially broken view of a fourth embodiment of a nozzle attachment;

[0068] Figure 14: a view of the arrangement of Figure 13 in the direction of arrow D;

[0069] Figure 15: a sectional view taken along line 15-15 in Figure 14;

[0070] Figure 16: a perspective, partially broken view of a fifth embodiment of a nozzle attachment;

[0071] Figure 17: a view of the arrangement of Figure 16 in the direction of arrow E;

[0072] Figure 18: a sectional view taken along line 18-18 in Figure 17;

[0073] Figure 19: a schematic perspective, partially broken view of a sixth embodiment of a nozzle attachment;

[0074] Figure 20: a view of the arrangement of Figure 19 in the direction of arrow F;

[0075] Figure 21: a sectional view along line 21-21 in Figure 20;

[0076] Figure 22: a schematic perspective, partially broken view of a seventh embodiment of a nozzle attachment;

[0077] Figure 23: a view of the arrangement of Figure 22 in the direction of arrow G;

[0078] Figure 24: a sectional view taken along line 24-24 in Figure 23;

[0079] Figure 25: a sectional view taken along line 25-25 in Figure 23;

[0080] Figure 26: a schematic representation of another embodiment of a cleaning device; and Figure 27: a schematic representation of another embodiment of a cleaning device.

[0081] Figure 1 schematically illustrates an embodiment of a cleaning device, designated overall by reference numeral 10. It is designed in the form of a spray extraction device 12.

[0082] The structure of the cleaning device 10 from Figure 1 is shown schematically in Figure 27.

[0083] A suction device 16 and a conveying device 18 are arranged in a housing 14 of the cleaning device 10. The suction device 16 is fluidly connected to a suction connection 20 on the housing 14. The conveying device 18 is fluidly connected to a cleaning fluid connection 22 on the housing 14. A cleaning fluid container 24 is arranged in the housing 14 and is designed to hold a cleaning fluid, for example, water. The cleaning fluid container 24 is fluidly connected to the conveying device 18 in a manner not shown, so that cleaning fluid can be conveyed from the cleaning fluid container 24 to the cleaning fluid connection 22 by means of the conveying device 18.

[0084] The housing 14 also accommodates a dirty water container 26, which is fluidly connected to the suction device 16. The suction device 16 is designed to convey a dirty water container from the suction connection 20 into the dirty water container 26.

[0085] The cleaning device 10 further comprises a cleaning hose 28, which is connected or connectable to both the suction connection 20 and the cleaning fluid connection 22.

[0086] The cleaning hose 28 comprises a hose suction channel 30 with a first hose suction channel end 32 and a second hose suction channel end 34. The cleaning hose 28 further comprises a hose fluid channel 36 with a first hose fluid channel end 38 and a second hose fluid channel end 40.

[0087] The cleaning hose 28 comprises an outer suction hose 42, which surrounds or defines the hose suction channel 30. The hose fluid channel 36 is defined by a fluid hose 44, which is guided through the suction hose 42 and thus through the hose suction channel 30.

[0088] The cleaning device 10 further comprises a suction nozzle 46 with a handpiece 48 and a nozzle attachment 50.

[0089] A valve device 52 is arranged on the handpiece 48 for opening or closing a handpiece fluid channel 54, which extends through the handpiece 48. A handpiece suction channel 56 also extends through the handpiece 48. A proximal end of the handpiece fluid channel 54 is fluidly connected or connectable to the first hose fluid channel end 38. A proximal end of the handpiece suction channel 56 is connected or connectable to the first hose suction channel end 32.

[0090] The handpiece 48 and the nozzle attachment 50 are either permanently connected to each other or alternatively designed to be detachably connected.

[0091] In embodiments, the nozzle attachment 50 is arranged or designed on the handpiece 48 either so as to be rotatable or non-rotatable.

[0092] The cleaning hose 28 is designed such that the second hose suction channel end 34 is or can be fluidly connected to the suction connection 20 of the cleaning device, and such that the second hose fluid channel end 40 is or can be fluidly connected to the cleaning fluid connection 22 of the cleaning device 10. The cleaning device 10, shown schematically in Figure 1, can be operated independently of a mains power supply. A rechargeable battery 58 is provided for this purpose. It serves to supply all electrical components of the cleaning device 10 with electrical energy. Alternatively or additionally, a mains connection device can also be provided.

[0093] A first embodiment of a nozzle attachment 50 is explained in more detail below in connection with Figures 3 to 6.

[0094] A proximal end 60 of the nozzle attachment 50 is designed to be detachably connectable to a distal end 62 of the handpiece 48. A coupling device 44, not shown or described in detail, is provided for this purpose.

[0095] The nozzle attachment 50 comprises a nozzle suction channel 66 and a nozzle fluid channel 68 fluidly separated therefrom.

[0096] A proximal end 70 of the nozzle suction channel 66 is fluidly connected to a distal end of the handpiece suction channel 56 in a coupling position of the handpiece 48 and the nozzle attachment 50. Such a coupling position is schematically illustrated in Figure 3. A proximal end 72 of the nozzle fluid channel 68 is fluidly connected to a distal end of the handpiece fluid channel 54.

[0097] The nozzle fluid channel 68 includes a fluid outlet 74 on the distal side for discharging a cleaning fluid. The nozzle suction channel 66 includes a suction channel inlet 76 on the distal side for receiving a dirty water solution.

[0098] The nozzle attachment 50 further comprises a cleaning element 78. The cleaning element 78 spatially separates the fluid outlet 74 and the suction channel inlet 76 from one another, thereby defining a fluid outlet region 80 and a suction channel inlet region 82 separate from the fluid outlet region. The nozzle attachment 50 comprises a hollow cylindrical tube section 84, which surrounds or defines the nozzle suction channel 66. At a distal end 86, a sealing element 88 is arranged or formed on the tube section 84, projecting in the distal direction and surrounding the suction channel inlet region 82 and the fluid outlet region 80. In the first exemplary embodiment of Figures 3 to 6, the sealing element 88 borders exclusively on the suction channel inlet region 82.

[0099] The sealing element 88 is designed to be deformable, particularly flexible and / or elastic. It is realized in the form of a sealing lip.

[0100] The sealing element 88 is sleeve-shaped. It extends parallel to a fluid outlet longitudinal axis 92, which is defined by the fluid outlet 74. In this embodiment, the sealing element 88 concentrically surrounds the fluid outlet longitudinal axis 92.

[0101] The sealing element 88 is designed to be either permanently or detachably connectable to the nozzle attachment 50.

[0102] The sealing element 88 defines a sealing element edge 94 on the distal side. The sealing element edge 94 in turn defines an edge plane 96. The edge plane 96 runs transversely, in the first embodiment shown in the figures perpendicular to the fluid outlet longitudinal axis 92.

[0103] The sealing element 88 has a sealing element length 98 parallel to the fluid outlet longitudinal axis 92.

[0104] In the first exemplary embodiment of Figures 3 to 6, the fluid outlet 74 is positioned centrally on the nozzle attachment 50, viewed from the distal end, i.e., in the direction of arrow A in Figure 4. The nozzle fluid channel 68 is delimited or defined by a fluid tube 100, which extends concentrically to the fluid outlet longitudinal axis 92 inside the tube section 94, starting from the proximal end 72 in the distal direction. A distal end 102 of the fluid tube 100 is set back slightly in the proximal direction relative to the distal end 96 of the tube section 84.

[0105] Starting from the distal end 102, a short internal thread section 104 is formed on the fluid tube 1000. An external thread section 106 of a nozzle 108 is screwed into this section. The nozzle 108 has a nozzle channel 110, the proximal end 112 of which connects to the nozzle fluid channel 68 on the distal side.

[0106] An inner diameter defined by the nozzle channel 110 is significantly smaller than an inner diameter of the nozzle fluid channel 68. In the illustrated first embodiment, the inner diameter of the nozzle fluid channel 68 is more than 10 times larger than the inner diameter of the nozzle channel 110.

[0107] A distal end 114 of the nozzle 108 is set back slightly in the proximal direction relative to the distal end 86 of the tube section 84.

[0108] An annular support 116 is arranged on the outside of the fluid tube 100, approximately in the region of the externally threaded section 106. This support has a plurality of blind holes 118 open in the distal direction. A bristle bundle 120 with a plurality of bristles 122 is received in each of the blind holes 118. The bristles 122 are thus received in the blind holes 118 with their proximal end portions. The bristles 122 have a total length 124. They protrude from the blind holes 116 by a length 126. Thus, they protrude from the support 116 in the distal direction by a length 126.

[0109] The cleaning element 78 comprises the carrier 116 and the plurality of bristles 112 arranged or formed on the carrier 116. The carrier 116, which is ring-shaped or sleeve-shaped as described, surrounds the fluid outlet 74. The distal end 114 of the nozzle 108 and thus the fluid outlet 74 protrude slightly beyond a distal boundary edge 128 of the carrier 116.

[0110] The fluid outlet 74 includes the nozzle 108.

[0111] The described cleaning element 78 is designed in the form of a ring brush 130. The ring brush 130 comprises a closed, annular ring of bristles 132. The cleaning element 78, which is designed to be ring-shaped as described, is designed to be closed and surrounds the fluid outlet 74 in a ring-like manner.

[0112] The bristles 122 define a bristle longitudinal direction 134 which is aligned parallel or substantially parallel to the fluid outlet longitudinal axis 92.

[0113] The described nozzle 108 is designed as a separate component, for example, made of a metallic material, and can be releasably connected, namely screwed or latched, to the distal end of the nozzle fluid channel 68. In alternative embodiments, the nozzle 108 can additionally or alternatively be integrally connected to the nozzle fluid channel 68, for example, by gluing, welding, or soldering.

[0114] Due to the special arrangement of the fluid tube 100 in the tube section 84, the suction channel inlet 76 is designed as a closed ring and concentrically surrounds the fluid outlet 74. The suction channel inlet 76 and the fluid outlet 74 are thus also arranged adjacent to one another.

[0115] The cleaning element 78 defines the fluid outlet region 80, specifically around it. Furthermore, the cleaning element 78 defines the suction channel inlet region 82 in the radial direction toward the fluid outlet longitudinal axis 92. As described and schematically illustrated in the figures, the sealing element 88 and the cleaning element 78 form a closed boundary of the suction channel inlet region 82 formed between them. In the first exemplary embodiment of Figures 3 to 6, both the inner and outer boundaries of the annular suction channel inlet 76 are circular. This results in an annular suction channel inlet 76 and an annular suction channel inlet region 82 defined by the sealing element 88 and the cleaning element 78.

[0116] The cleaning element 78 is designed to be fluid-permeable due to its design with the bristles 122.

[0117] The cleaning element 78 defines a cleaning element end 136 on the distal side, which protrudes beyond the sealing element edge 94 on the distal side.

[0118] The cleaning element 78 forms, with the cleaning element end 136, a cleaning element end surface 138, which defines an end surface plane 140. In the first exemplary embodiment illustrated in Figures 3 to 6, the end surface plane 140 extends transversely, namely perpendicularly, to the fluid outlet longitudinal axis 92. The cleaning element end surface 138 is further defined by distally facing end surfaces 142 of free ends of the plurality of bristles 122.

[0119] In the first embodiment illustrated in Figures 3 to 6, the edge plane 96 and the end surface plane 140 run parallel to one another. However, the end surface plane 140 runs distally of the edge plane 96. The edge plane 96 and the end surface plane 140 are spaced apart from one another, as can be clearly seen in Figure 6, and define a distance 144 from one another. A value of the distance 144 lies in a range from approximately 0.5 mm to approximately 3 mm. Preferably, the distance 144 is approximately 1 mm.

[0120] As can also be clearly seen in Figure 6, the length 126 defines a free cleaning element length 146 of the cleaning element 78 parallel to the fluid outlet longitudinal axis 92. The free cleaning element length 146 corresponds to a distance of the carrier 116 from the end surfaces 142 of the bristles 122. The cleaning element length 146 is slightly greater than the sealing element length 98. In the first embodiment, the cleaning element length 146 and the sealing element length 98 differ by the distance 144.

[0121] In the first embodiment, the cleaning element 78 is designed to be detachably connectable to the nozzle attachment 50. To replace the cleaning element 78, the carrier 116 can be pulled distally from the fluid tube 100.

[0122] In order to achieve a desired nozzle effect with the nozzle 108, the fluid outlet 74, thus the nozzle channel 110, has a fluid outlet cross-section that is significantly smaller than a free suction channel inlet cross-section defined by the suction channel inlet 76. A ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section is in a range from approximately 1 / 100 to approximately 1 / 20 in the first embodiment illustrated in the figures. In other embodiments, it may be in a range from approximately 1 / 100 to approximately 1 / 50.

[0123] In alternative embodiments, the nozzle 108 is formed integrally with the nozzle attachment 50, in particular monolithically.

[0124] The fluid tube 100 is connected to the tube section 84 by means of two support struts 148. The support struts 148 extend obliquely from the fluid tube 100 in the radial and proximal directions toward the tube section 84.

[0125] The nozzle attachment 50 can be formed exclusively from plastic. In particular, the bristles 122 can be formed from a plastic. The tube section 84 can be formed with the fluid tube by injection molding. The sealing element 88 can be injection-molded onto the tube section 84 by two-component injection molding. A second embodiment of a nozzle attachment 50 is schematically illustrated in Figures 7 to 9. It differs from the structure of the nozzle attachment 50 according to the first embodiment of Figures 3 to 6 in that the nozzle attachment 50 is angled. Due to the great similarity between the nozzle attachments 50 of the first and second embodiments, identical, functionally similar, or comparable components are designated by the same reference numerals.

[0126] The nozzle attachment 50 comprises, as schematically illustrated in Figures 7 to 9, a distal nozzle attachment section 150 and a proximal nozzle attachment section 152. The fluid outlet 74 and the suction channel inlet 76 are arranged or formed on the distal nozzle attachment section 150. The proximal nozzle attachment section 152 is either permanently connected to the handpiece 48 or detachably connectable to the handpiece 48. The distal nozzle attachment section 150 and the proximal nozzle attachment section 152 are angled relative to one another.

[0127] The distal nozzle attachment section 150 defines a distal nozzle attachment section longitudinal axis 154. The proximal nozzle attachment section 152 defines a proximal nozzle attachment section longitudinal axis 156. The proximal nozzle attachment section longitudinal axis 156 and the distal nozzle attachment section longitudinal axis 154 enclose a bend angle 158, which has a value in a range of approximately 90° to 180°. In particular, it lies in a range of approximately 125° to 155°. In the embodiment of Figures 7 to 9, the bend angle 158 is approximately 145°. The fluid tube 100 and the tube section 84 also extend bent by the bend angle 158 and each define sections that run coaxially with the distal proximal nozzle attachment section longitudinal axes 154 and 156.

[0128] A distal end section or end region of the distal nozzle attachment section 150 is formed identically to a distal end region of the nozzle attachment 50 according to the first embodiment of Figures 3 to 6, so that reference can be made to the above description in this regard.

[0129] A third embodiment of a nozzle attachment 50 is schematically illustrated in Figures 10 to 12. This embodiment is also very similar to the first embodiment, so that here, as in all embodiments described below, the same reference numerals are used to designate identical and functionally similar components.

[0130] The third embodiment differs from the first embodiment only in the configuration of a distal end region 160 of the nozzle attachment 50. The tube section 84 is configured to transition from a circular cross-section to a substantially triangular cross-section toward the end 86. The top view of the nozzle attachment 50 in the direction of arrow C in Figure 10, as shown in Figure 11, shows the triangular end 86 with rounded corners. The sealing element 88 is molded onto the end 86, as in the first embodiment, and therefore has a similar contour to the end 86.

[0131] The described configuration of the end region 160 results in an annular, namely circular, boundary of the suction channel inlet region 82 through the cleaning element 78 in the direction of the fluid outlet longitudinal axis 92. An outer boundary, i.e., away from the fluid outlet longitudinal axis 92, of the suction channel inlet region 82 is polygonal, namely triangular. Thus, the inner and outer boundaries of the annular suction channel inlet 76 can differ from one another. They therefore do not have to be geometrically similar, as is the case with the first and second embodiments of the nozzle attachment 50.

[0132] Figures 13 to 15 illustrate a fourth exemplary embodiment of a nozzle attachment 50. The fourth exemplary embodiment differs from the third exemplary embodiment in the design of the carrier 116 and the design of the cleaning element 78. In the fourth exemplary embodiment, the carrier 116 is triangular and thus geometrically similar to the triangular distal end 86 of the end region 160 of the tube section 84.

[0133] On the carrier 116, a plurality of bristle bundles 120 comprising a plurality of bristles 122 are arranged along an outer boundary and thus form a triangular boundary or separation of the fluid outlet region 80 from the suction channel inlet region 82.

[0134] A fifth embodiment of a nozzle attachment 50 is schematically illustrated in Figures 16 to 18. It differs from the first embodiment in the design of the end region 160. The tube section 84, which is circular toward the proximal end, widens in the end region 160 such that a rectangular circumferential end 86 is defined, around which the correspondingly rectangular sealing element 88 is arranged. As in the first embodiment, the cleaning element 78 is arranged in a circular ring around the fluid outlet 74 and delimits a circular fluid outlet region 80.

[0135] The boundary of the suction channel inlet area 82 by the cleaning element 78 is circular. The sealing element 88 forms a square boundary of the suction channel inlet area 82.

[0136] A sixth embodiment of a nozzle attachment 50 is schematically illustrated in Figures 19 to 21. This embodiment differs from the fifth embodiment only in the design of the cleaning element 78, in particular the carrier 116, and the arrangement of the bristle bundles 120 or bristles 122.

[0137] The carrier 116 is essentially quadrangular, namely square. A plurality of bristle bundles 120 comprising a plurality of bristles 122 are arranged on an outer edge region of the carrier 116, as in the other exemplary embodiments, with the bristle longitudinal direction 134 aligned parallel or essentially parallel to the fluid outlet longitudinal axis 92. The bristle bundles 120 thus form a boundary or a separation or a separation element which, when viewed from the front onto the nozzle set 50, i.e. in the direction of arrow F in Figure 19, has a square shape. The fluid outlet region 80 is thus essentially quadrangular. The suction channel inlet region 82 is rectangular on the outside and delimited by the circumferential sealing element 88, which is positioned at the distal and rectangular end 86 of the end region 160.

[0138] In the six described embodiments of nozzle attachments 50, the suction channel inlet regions 82 are each configured to surround the fluid outlet region 80 in a ring shape. This is achieved by the cleaning element 78 annularly enclosing the fluid outlet region 80, regardless of the shape of the ring, for example, circular as in the first embodiment, triangular as in the fourth embodiment, or square as in the sixth embodiment.

[0139] In the seventh embodiment of a nozzle attachment 50, as schematically illustrated in Figures 22 to 25, the end region 160 is shaped similarly to the fifth and sixth embodiments, forming a rectangular distal end 86. The sealing element 88 is arranged at the end 86 and is also circumferentially and self-contained, as in the fifth and sixth embodiments.

[0140] Unlike the previous embodiments, however, the cleaning element 78 is not arranged in a ring-like manner surrounding the fluid outlet 74, but rather divides the rectangular area defined by the end area 160 into two separate rectangular areas, namely the fluid outlet area 80, within which the fluid outlet 74 is arranged, and the suction channel inlet area 82, which opens into the suction channel inlet 76. The carrier 116 is rectangular in shape with a central opening 162 into which the nozzle 108 is inserted. The fluid outlet area 80 is thus bounded on one side by the cleaning element 88 and on three sides by the sealing element 88.

[0141] The suction channel inlet area 82 is delimited on one side by the cleaning element 78 and also on three sides by the sealing element 88. In this exemplary embodiment, the suction channel inlet 76 and the fluid outlet 74 are thus arranged adjacent to one another, with the cleaning element 78 only partially delimiting the fluid outlet area 80 and the suction channel inlet area 82. "Partially" here means, in particular, in sections. A circumferential boundary of the fluid outlet area 80 and the suction channel inlet area 82 is defined on a common section by the cleaning element 78 and on the remaining sections by the sealing element 88.

[0142] The design of the seventh embodiment requires a different type of processing of the surface to be cleaned. The seventh embodiment of the nozzle attachment 50 only allows unidirectional processing. If the nozzle attachment 50 is placed with the sealing element edge 94 on the surface to be cleaned and cleaning fluid is applied from the fluid outlet 74 to the surface to be cleaned, then this nozzle attachment 50 should only be moved as schematically symbolized by the arrow 164 in Figure 24.After wetting the surface to be cleaned, the cleaning element 78 should be moved over it so that, after the mechanical processing of the surface to be cleaned with the cleaning element 78, the suction channel inlet area 82 is moved over this area of ​​the surface to be cleaned in order to then suck the dirty water, which includes the cleaning fluid and any dirt dissolved therein, from the surface to be cleaned into the nozzle suction channel 66. Only the described procedure, i.e., the unidirectional processing of the surface to be cleaned, ensures that the applied cleaning fluid is also sucked away again.

[0143] In contrast to the seventh embodiment, the embodiments one to six allow any processing direction when using these nozzle attachments 50. Because the suction channel inlet area 82 surrounds the fluid outlet area 80 in a ring shape, it does not matter in which direction the nozzle attachment 50 is moved over the surface to be cleaned.

[0144] Figure 6 shows two arrows 166 and 168, which symbolize opposing directions of movement. If cleaning fluid is applied to the surface to be cleaned in the embodiment of Figure 6, the cleaning fluid is applied to the surface to be cleaned in the fluid outlet area 80, i.e., in the fluid outlet area 80 surrounded by the cleaning element 78. If the nozzle attachment 50 is subsequently moved in the direction of arrow 166, the cleaning element 78 sweeps over the surface to be cleaned, effecting mechanical cleaning. When sweeping over or after sweeping over the surface to which cleaning fluid has been applied, the suction channel inlet area 82 is then positioned above the surface to be cleaned that has been applied to the cleaning fluid. In Figure 6, this is the lower area between the cleaning element 78 and the sealing element 88.

[0145] If the nozzle attachment 50 is moved in the opposite direction, i.e. in the direction of the arrow 160, the surface area wetted with cleaning fluid, which is swept over after wetting with the cleaning element 78, is positioned below the suction channel inlet area 82, which in Figure 6 is formed above the cleaning element 78 and is delimited by the sealing element 88.

[0146] The described embodiments of nozzle attachments 50 can, in alternative embodiments, also have other boundaries of the annular, self-contained suction channel inlet 76. In particular, the inner and outer boundaries can be geometrically similar or dissimilar. All conceivable shapes are conceivable for the inner and / or outer boundaries, for example, oval, circular as in the first embodiment, polygonal, in particular triangular as in the fourth embodiment, square as in the sixth embodiment, or even pentagonal or hexagonal.

[0147] To achieve a desired cleaning result, all described embodiments of nozzle attachments 50 provide for the cleaning element 78 to protrude slightly distally and in the distal direction beyond the sealing element 88, namely the sealing element wheel 94. Thus, when the nozzle attachment 50 is placed on the surface to be cleaned, a type of rough seal is initially created around the fluid outlet region 80 by the cleaning element 78. The deformable cleaning element 78 allows the nozzle attachment 50 to be moved even closer to the surface to be cleaned until the sealing element edge 94 seals the surface to be cleaned, thus sealing the suction channel inlet region 82, which surrounds the fluid outlet region 80 or is at least spatially separated from it.

[0148] In particular, embodiments one to six of the nozzle attachments 50 are ideally suited for cleaning shoes 170 as well as seats 172 or upholstery 174 thereof. Cleaning fluid, in particular water or a cleaning agent dissolved in water, can thus be applied to the surface to be cleaned. Due to the provided seal of the nozzle attachment 50 with the sealing element 80, the cleaning fluid cannot run off the object to be cleaned, but rather, after application and mechanical processing with the cleaning element 78, is sucked through the suction channel inlet area 82 into the nozzle suction channel 66. Textile materials, in particular, can thus be cleaned easily, gently, and cleanly, i.e., without contaminating the surrounding area.

[0149] The sealing element 88, especially if it is sufficiently flexible or elastic, can optimally seal almost any curved surface. Surfaces can be wet-cleaned using the described nozzle attachments 50. Dirt can be loosened with the cleaning fluid, and the surface can be mechanically treated with the cleaning element 78. The resulting dirt solution, i.e., the dirt dissolved in the cleaning fluid, can then be vacuumed away and collected in the dirt solution container 26 of the cleaning device 10.

[0150] In a not-shown embodiment of a nozzle attachment 50, the cleaning element 78 is designed to be movable. For this purpose, a drive 176, as schematically shown in the embodiment of Figure 26, can be arranged on the handpiece 48. The drive 176 can be designed to be selectively activated or deactivated, depending on the cleaning task.

[0151] The drive 176 can, for example, be designed in the form of an oscillation, rotation or vibration drive.

[0152] The fluid delivery can be manually activated or deactivated by means of a valve device 52 as described.

[0153] In the exemplary embodiment of the cleaning device 10 according to Figure 26, a control device 178 is schematically illustrated for activating or deactivating the conveying device 18 for conveying the cleaning fluid from the cleaning fluid container 24 to the fluid outlet 74. The control device 178 can, for example, be connected for control purposes to an actuating element on the handpiece 48.

[0154] Alternatively, as schematically illustrated in Figure 26, a sensor 180 in the form of a touch sensor or a pressure sensor can be arranged or formed on the nozzle attachment 50, which is connected to the control device 178 for control purposes to automatically start a fluid discharge upon actuation of the sensor 180. With such a nozzle attachment 50, a cleaning fluid can therefore be automatically discharged onto the surface to be cleaned when the nozzle attachment 50 is placed on the surface to be cleaned. The sensor 180 can, in particular, be an inductive or capacitive proximity sensor or a mechanical sensing element. A control-effective connection to the control device 178 can be formed either via a control line or wirelessly via a radio connection.

[0155] By appropriately designing a proximal end 60 of the nozzle attachment 50, the nozzle attachment 50 can be provided as an accessory for commercially available cleaning devices 10. The nozzle attachments 50 can be used depending on the cleaning task to be solved. In particular, the shape and size of the nozzle attachments 50 can be selected accordingly. The described embodiments provide a person skilled in the art with sufficient suggestions for appropriately shaping the distal end 86 with the sealing element 88 arranged circumferentially thereon.

[0156] The fluid outlet regions 80 of the described embodiments preferably have a cross-sectional area with a value of approximately 1 cm 2 up to about 2cm 2 This allows relatively small areas to be precisely wetted with cleaning fluid, preventing excessive application of cleaning fluid.

[0157] List of reference symbols

[0158] cleaning device

[0159] Spray extraction device

[0160] Housing

[0161] Suction device

[0162] conveyor system

[0163] Suction connection

[0164] Cleaning fluid connection

[0165] Cleaning fluid container

[0166] Dirty water container

[0167] cleaning hose

[0168] Hose suction channel first hose suction channel end second hose suction channel end

[0169] Hose fluid channel first hose fluid channel end second hose fluid channel end

[0170] suction hose

[0171] Fluid hose

[0172] suction nozzle

[0173] Handpiece

[0174] nozzle attachment

[0175] Valve device

[0176] Handpiece fluid channel

[0177] Handpiece suction channel

[0178] Battery proximal end distal end coupling device nozzle suction channel nozzle fluid channel proximal end proximal end fluid outlet suction channel inlet cleaning element fluid outlet area

[0179] Suction channel inlet area pipe section

[0180] End

[0181] Sealing element

[0182] Sealing lip Fluid outlet longitudinal axis Sealing element edge Edge plane Sealing element length Fluid tube distal end

[0183] Internal thread section External thread section Nozzle

[0184] Nozzle channel end distal end

[0185] carrier

[0186] blind hole

[0187] bundle of bristles

[0188] bristle

[0189] Total length

[0190] length

[0191] boundary edge

[0192] Ring brush

[0193] Bristle wreath

[0194] Bristle longitudinal direction

[0195] Cleaning element

[0196] Cleaning element end face

[0197] End face plane

[0198] End face

[0199] Distance

[0200] Cleaning element length

[0201] Support strut distal nozzle attachment section proximal nozzle attachment section distal nozzle attachment section longitudinal axis proximal nozzle attachment section longitudinal axis

[0202] bending angle

[0203] End area

[0204] Opening Arrow Arrow Arrow Shoe Seat Cushion Drive Control Device Sensor

Claims

Patent claims 1. Nozzle attachment (50) for a handpiece (48) of a cleaning device (10), in particular for a handpiece (48) of a spray extraction device (12) or a steam cleaner, wherein the nozzle attachment (50) comprises a nozzle suction channel (66) and a nozzle fluid channel (68) fluidically separated therefrom, wherein the nozzle fluid channel (68) comprises a fluid outlet (74) on the distal side for dispensing a cleaning fluid and wherein the nozzle suction channel (66) comprises a suction channel inlet (76) on the distal side for receiving a dirty water, characterized in that the nozzle attachment (50) comprises at least one cleaning element (78) and that the fluid outlet (74) and the suction channel inlet (76) are spatially separated from one another by the at least one cleaning element (78) to form a fluid outlet region (80) and a suction channel inlet region (82) separate therefrom.

2. Nozzle attachment according to claim 1, characterized in that the suction channel inlet (76) and the fluid outlet (74) are arranged adjacent to one another and that the at least one cleaning element (78) delimits the fluid outlet area (80) and the suction channel inlet area (82) only partially or in sections.

3. Nozzle attachment according to claim 1 or 2, characterized in that the suction channel inlet (76) is designed to be closed in a ring shape and surrounds the fluid outlet (74), in particular concentrically, wherein in particular inner and / or outer boundaries of the annular suction channel inlet (76) are designed to be oval, circular, polygonal, in particular triangular, square or pentagonal.

4. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (78) a) is designed to be fluid-permeable and / or b) is formed in a closed ring shape and surrounds the fluid outlet (74).

5. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (78) a) is designed in a brush-like manner and comprises a plurality of bristles (122) and / or bristle bundles (120) and / or b) is designed in the form of a ring brush (130) with a self-contained annular bristle ring (132).

6. Nozzle attachment according to claim 5, characterized in that a) the bristles (122) define a bristle longitudinal direction (134), that the fluid outlet (74) defines a fluid outlet longitudinal axis (92) and that the bristle longitudinal direction (134) and the fluid outlet longitudinal axis (92) are aligned parallel or substantially parallel to one another and / or b) the at least one cleaning element (78) comprises a carrier (116) and that the plurality of bristles (122) are arranged or formed on the carrier (116), wherein in particular the carrier (116) is annular or sleeve-shaped and surrounds the fluid outlet (74) and / or the fluid outlet (74) protrudes distally beyond a distal-side boundary edge (128) of the carrier (116).

7. Nozzle attachment according to one of the preceding claims, characterized in that the fluid outlet (74) comprises a nozzle (108), wherein in particular the nozzle (108) a) is formed integrally with the nozzle attachment (50), in particular monolithically or b) is designed as a separate component and is detachably connectable to a distal end of the nozzle fluid channel (68), in particular screwable or latchable.

8. Nozzle attachment according to one of the preceding claims, characterized in that the fluid outlet (74) defines a free fluid outlet cross-section, that the suction channel inlet (76) defines a free suction channel inlet cross-section and that a ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section is in a range from approximately 1 / 100 to approximately 1 / 20, in particular in a range from approximately 1 / 100 to approximately 1 / 50.

9. Nozzle attachment according to one of the preceding claims, characterized in that a sealing element (88) is arranged or formed on the nozzle attachment (50) on the distal side, projecting in the distal direction and surrounding the fluid outlet region (80) and the suction channel inlet region (82).

10. Suction nozzle according to claim 9, characterized in that the at least one cleaning element (78) protrudes distally and in the distal direction beyond the sealing element (88).

11. Nozzle attachment according to claim 9 or 10, characterized in that the sealing element (88) a) exclusively adjoins the suction channel inlet area (82) and / or b) is designed to be deformable, in particular flexible and / or elastic, and / or c) is designed in the form of a sealing lip (90) and / or d) is sleeve-shaped and extends parallel or substantially parallel to the fluid outlet longitudinal axis (92), in particular concentrically.

12. Nozzle attachment according to one of claims 9 to 11, characterized in that the sealing element (88) is designed to be detachably connectable to the nozzle attachment (50).

13. Nozzle attachment according to one of claims 9 to 12, characterized in that the sealing element (88) and the at least one cleaning element (78) each form a self-contained boundary of the suction channel inlet area (82) formed between them.

14. Nozzle attachment according to one of claims 9 to 13, characterized in that the sealing element (88) defines a sealing element edge (94) on the distal side, that the at least one cleaning element (78) defines a cleaning element end (136) on the distal side and that the cleaning element end (136) protrudes beyond the sealing element edge (94) on the distal side, wherein in particular the sealing element edge (94) defines an edge plane (96), wherein further in particular the edge plane (96) runs transversely, in particular perpendicularly, to the fluid outlet longitudinal axis (92).

15. Nozzle attachment according to one of claims 9 to 14, characterized in that the sealing element (88) has a sealing element length (98) parallel to the fluid outlet longitudinal axis (92), that the at least one cleaning element (78) has a cleaning element length (146) parallel to the fluid outlet longitudinal axis (92) and that the cleaning element length (146) is greater than the sealing element length (98).

16. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (78) is distally side has a cleaning element end surface (138) and that the cleaning element end surface (138) defines an end surface plane (140) which runs transversely, in particular perpendicularly, to a fluid outlet longitudinal axis (92) of the fluid outlet (74), wherein in particular a) the cleaning element end surface (138) is defined by end surfaces (142) of free ends of the plurality of bristles (122) pointing in the distal direction and / or b) the edge plane (96) and the end surface plane (140) run parallel to one another and the end surface plane (140) runs distally of the edge plane (96) and / or c) the edge plane (96) and the end surface plane (140) are at a distance (144) from one another and that the distance (144) has a value in a range from approximately 0.5 mm to approximately 3 mm, in particular a value of approximately 1 mm.

17. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (78) is designed to be detachably connectable to the nozzle attachment (50).

18. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (78) is arranged or formed on the nozzle attachment (50) so as to be movable, in particular with a drive (176), wherein in particular the nozzle attachment (50) comprises a drive (176) for moving the nozzle attachment or parts thereof, in particular for moving the at least one cleaning element (78), in particular in the form of an oscillation, rotation or vibration drive.

19. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle attachment (50) is angled and comprises a distal and a proximal nozzle attachment section (150, 152), that the fluid outlet (74) and the suction channel inlet (76) are arranged or formed on the distal nozzle attachment section (150), that the proximal nozzle attachment section (152) is connected or connectable to a handpiece (48), and that the distal and the proximal nozzle attachment section (150, 152) are angled relative to one another, wherein in particular the proximal nozzle attachment section (152) defines a proximal nozzle attachment section longitudinal axis (156) and that the distal nozzle attachment section (150) defines a distal nozzle attachment section longitudinal axis (154),that the proximal nozzle attachment section longitudinal axis (156) and the distal nozzle attachment section longitudinal axis (154) enclose a bend angle (158) and that the bend angle (158) has a value in a range of approximately 90° to 180°, in particular in a range of approximately 125° to approximately 155°., 20. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle attachment (50), in particular the at least one cleaning element (78), is made of a plastic.

21. Suction nozzle (46) for a cleaning device (10), in particular for a spray extraction device (12) or a steam cleaner, which suction nozzle (46) comprises a handpiece (48) and a nozzle attachment (50), characterized in that the nozzle attachment (50) is designed in the form of a nozzle attachment (50) according to one of the preceding claims, wherein in particular a) the handpiece (48) and the nozzle attachment (50) are designed to be detachably connectable to one another and / or b) the nozzle attachment (50) is arranged or designed to be rotatable on the handpiece (48).

22. Cleaning hose (28) for a cleaning device (10), in particular for a spray extraction device (12) or a steam cleaner, wherein the cleaning hose (28) comprises a hose suction channel (30) with a first and a second hose suction channel end (32, 34) and a hose fluid channel (36) with a first and a second hose fluid channel end (38, 40), wherein the first hose suction channel end (32) and the first hose fluid channel end (38) are connected or connectable to a handpiece (48) of a suction nozzle (46), characterized in that the suction nozzle (46) is designed in the form of a suction nozzle (46) according to claim 21, wherein in particular the second hose suction channel end (34) is fluidly connectable or connected to a suction connection (20) of the cleaning device (10) and that the second hose fluid channel end (40) is fluidly connected to a fluid connection (22) of the cleaning device (10). connectable or connected.

23. Cleaning device (10), in particular in the form of a spray extraction device (12) or a steam cleaner, comprising a suction device (16), a conveying device (18), a suction connection (20) and a cleaning fluid connection, wherein the suction device (16) is fluidly connected to the suction connection (20) and wherein the conveying device (18) is fluidly connected to the cleaning fluid connection (22), wherein the cleaning device (10) further comprises a cleaning hose (28) connected or connectable to both the suction connection (20) and the cleaning fluid connection (22), characterized in that the cleaning hose (28) is designed in the form of a cleaning hose (28) according to claim 22.

24. Cleaning device according to claim 23, characterized in that the cleaning device (10) comprises a control device (178) for controlling the conveying device (18) for activating and deactivating a fluid discharge, wherein in particular the nozzle attachment (50) comprises a sensor (180), in particular a touch sensor (180) and / or a pressure sensor, and that the control device (178) is connected to the sensor (180) in a control-effective manner for automatically starting a fluid discharge upon actuation of the sensor (180).

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