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 effectively separated from it, wherein the nozzle fluid channel comprises a fluid outlet distally for dispensing a cleaning fluid, wherein the nozzle suction channel comprises a suction channel inlet distally for receiving a dirty water, wherein at least one limiting device projecting distally and forming an outer boundary of the suction channel inlet area is arranged or formed on the nozzle attachment distally, and wherein the fluid outlet is arranged or formed within the suction channel inlet area without spatial separation from the suction channel inlet area. Furthermore, an improved cleaning hose and an improved cleaning device are proposed.

Description

[0001] 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 vacuum cleaner, wherein the nozzle attachment comprises a nozzle suction channel and a nozzle fluid channel separated from it in a fluid-effective manner, wherein the nozzle fluid channel comprises a fluid outlet distally for dispensing a cleaning fluid and wherein the nozzle suction channel comprises a suction channel inlet distally for receiving a dirty solution.

[0002] Furthermore, the present invention relates to a suction nozzle for a cleaning device, in particular for a spray extraction device or a steam vacuum cleaner, which suction nozzle comprises a handpiece and a nozzle attachment.

[0003] 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 suction channel with a first and a second suction channel end and a fluid channel with a first and a second fluid channel end, wherein the first suction channel end and the first fluid channel end are connected or connectable to a handpiece of a suction nozzle.

[0004] Furthermore, the present invention relates to a cleaning device, in particular in the form of a spray extraction device or a steam vacuum cleaner, comprising a suction device, a conveying device, a suction port and a cleaning fluid port, wherein the suction device is fluidly connected to the suction port, wherein the conveying device is fluidly connected to the cleaning fluid port, and wherein the cleaning device further comprises a cleaning hose that is connected or connectable to both the suction port and the cleaning fluid port.

[0005] Nozzle attachments, suction nozzles, cleaning hoses and cleaning devices of the type described above are known, for example, from DE 10 2022 111 008 A1. The nozzle attachments described therein are particularly suitable for cleaning large areas such as carpets and large upholstered furniture or the like.

[0006] However, the known nozzle attachments are unsuitable for cleaning small objects made of textile material, such as shoes.

[0007] 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.

[0008] This problem is solved according to the invention in a nozzle attachment of the type described above by the fact that at least one limiting device projecting distally and forming an outer boundary of a suction channel inlet area defined by the suction channel inlet is arranged or formed on the distal side of the nozzle attachment, and that the fluid outlet is arranged or formed within the suction channel inlet area without spatial separation from the suction channel inlet area.

[0009] A modified nozzle attachment, as proposed, enables the simple and thorough cleaning of shoes, textiles, and hard surfaces, particularly small objects and / or curved and / or vertical surfaces. Specifically, car seats, upholstered furniture, strollers, clothing, and carpets can be optimally cleaned with such a nozzle attachment. Cleaning fluid can be dispensed from the nozzle attachment's fluid outlet and applied to the item being cleaned. By moving the nozzle attachment over the area treated with the cleaning fluid, dirt is loosened. As the nozzle attachment continues to be moved over the area where the cleaning fluid has been applied, the dispensed cleaning fluid, along with the collected dirt (the so-called dirty cleaning solution), is drawn into the suction channel inlet.The nozzle attachment allows a cleaning fluid to be applied to the object to be cleaned and extracted immediately after the dirt has been loosened – and, if necessary, after mechanical treatment of the surface with an optional cleaning element. With a suitable geometric design of the nozzle attachment in the region of its distal end, i.e., depending on the design of the fluid outlet and the suction channel inlet area, an object can be cleaned without the cleaning fluid being undesirably distributed in the surrounding area. Because the fluid outlet is located or designed within the suction channel inlet area without any spatial separation from it, a uniform application of the cleaning fluid across the entire suction channel inlet area can be achieved.For example, with a suitably sized distal end of the nozzle attachment, small items such as shoes can be cleaned without cleaning fluid dripping off. For optimal cleaning, the limiting device is elastic and / or flexible to adapt to the surface being cleaned. Unlike nozzle attachments whose distal ends are injection-molded from a hard plastic material, this design allows the cleaning fluid to effectively loosen dirt from the object being cleaned. The loosened dirt can then be drawn off the object as part of the cleaning solution using the nozzle attachment. The limiting device also prevents cleaning fluid from escaping the fluid outlet beyond the area defined by the device.The nozzle attachment can be specifically designed for one-handed operation. For this purpose, it can be ergonomically designed to allow comfortable and joint-friendly work for the user, enabling them to clean objects with the nozzle attachment for extended periods.

[0010] The fluid outlet is preferably surrounded by the limiting device as described to protect the area around the nozzle attachment from exposure to cleaning fluid. The cleaning fluid can be applied precisely to the surface to be cleaned via the fluid outlet. Suitable cleaning fluids include, in particular, a cleaning liquid, for example, water with or without chemical cleaning additives; a cleaning vapor, for example, steam with or without chemical cleaning additives; or a liquid-vapor mixture with or without chemical cleaning additives.

[0011] It is advantageous if the suction channel inlet defines a suction channel inlet direction and if the limiting device completely surrounds the suction channel inlet area circumferentially. In this way, a complete separation of the fluid inlet area from the surrounding area of ​​the nozzle attachment can be defined. If the nozzle attachment, along with the entire limiting device, is placed on a surface to be cleaned, cleaning fluid cannot escape laterally from the suction channel inlet area into the surrounding area of ​​the nozzle attachment, or only to a limited extent. Small objects, such as shoes, can thus be cleaned easily and reliably without contaminating the surrounding area with cleaning fluid.

[0012] It is advantageous if the limiting device comprises at least one limiting element which extends circumferentially around the intake duct inlet area, at least partially, and in particular completely, with respect to the intake duct inlet direction. The limiting device can thus be designed, in particular, from one or more limiting elements. These can extend, in particular, partially or completely around the intake duct inlet area, or even over a circumference of 360°. In particular, only a single limiting element may be provided. Two or more limiting elements may also be provided, which can also be designed in different ways.

[0013] Preferably, the at least one limiting element is designed in the form of a sealing element or a cleaning element. Designing the at least one limiting element as a sealing element particularly enables the best possible seal between the suction channel inlet area and the surroundings of the nozzle attachment. If the at least one limiting element is designed in the form of a cleaning element, the nozzle attachment can not only be used to apply a cleaning fluid to a surface to be cleaned and thus loosen dirt, but also to loosen and remove contaminants by mechanically working the object to be cleaned with the cleaning element.

[0014] According to a preferred embodiment, the limiting device may comprise at least one first limiting element and at least one second limiting element. Naturally, the limiting device may also comprise three, four, five, or more limiting elements. The at least one first limiting element and the at least one second limiting element may, in particular, be configured differently, for example, one as a sealing element and another as a cleaning element.

[0015] It is advantageous if the at least one first limiting element and the at least one second limiting element are arranged or designed to overlap at least partially, and in particular completely, in the circumferential direction with respect to the suction channel inlet direction, in order to form at least a partial, and in particular a complete, double limiting of the suction channel inlet in the circumferential direction. Such a design makes it possible, in particular, to realize a double limiting of the suction channel inlet over a certain area or section of the circumference of the limiting device, wherein the at least one first limiting element and the at least one second limiting element can, for example, run parallel and be arranged or designed directly adjacent to each other. For example, one limiting element can be designed as a sealing element and another limiting element as a cleaning element.The cleaning element can, for example, be directly adjacent to the suction channel inlet area, while the sealing element can be arranged or formed on a side of the cleaning element facing away from the suction channel inlet area.

[0016] It is advantageous if the at least one first limiting element is arranged or formed directly adjacent to the suction channel inlet, at least partially, and in particular completely, in the circumferential direction. For example, the at least one first limiting element can completely surround the suction channel inlet or only a specific partial area, for example, a quarter or half of the circumference.

[0017] Preferably, the at least one second limiting element, relative to the suction channel inlet direction, is arranged or formed at least sectionally, and in particular completely, adjacent to the suction channel inlet in the circumferential direction. The at least one second limiting element can, in particular, extend over a full circumference, i.e., over 360°, relative to the suction channel inlet direction, or only over a part of the circumference.

[0018] Furthermore, it is advantageous if the at least one first limiting element and the at least one second limiting element are arranged or formed adjacent to one another in the circumferential direction with respect to the suction channel inlet direction, without overlapping. In other words, the at least one first limiting element can limit the suction channel inlet area only over a portion of its circumference with respect to the suction channel inlet direction. The at least one second limiting element then continues the boundary partially formed by the at least one first limiting element. Thus, three, four, or more limiting elements, which may be identical or different, can be arranged or formed around the entire circumference of the suction channel inlet area in a corresponding manner. For example, alternating sections of the limiting device can be formed by sealing elements and cleaning elements.

[0019] The nozzle attachment can be designed particularly easily if the limiting device comprises only a single limiting element that completely surrounds the suction channel inlet area in the circumferential direction. This limiting element can optionally be designed as a sealing element or a cleaning element. A cleaning element can also achieve the desired sealing effect if appropriately designed. For example, if the cleaning element comprises several bristles arranged in a row, these can, if arranged sufficiently densely, also prevent cleaning fluid from escaping into the vicinity of the nozzle attachment.

[0020] Preferably, the single limiting element is designed in the form of a sealing element or a cleaning element. For example, by designing it as a sealing element, an optimal seal between the suction channel inlet area and the surrounding area of ​​the nozzle attachment can be achieved if the nozzle attachment, with the single limiting element, is placed on the object to be cleaned over its entire circumference. The same applies accordingly to a limiting element designed as a cleaning element.

[0021] Furthermore, it can be advantageous if the first limiting element is designed as a sealing element and the second limiting element is designed as a cleaning element. As already explained, limiting devices can be formed by overlapping limiting elements of different types. For example, a limiting element in the form of a cleaning element can be adjacent to the suction channel inlet area, and a limiting element in the form of a sealing element can be arranged or formed on the side of this cleaning element facing away from the suction channel inlet area. In this way, optimal sealing can be achieved while simultaneously enabling mechanical cleaning of the object to be cleaned.

[0022] According to a further preferred embodiment, the limiting device can be arranged to concentrically surround the fluid outlet. Such a design has the particular advantage that an object to be cleaned can be cleaned in any direction using such a nozzle attachment. When cleaning fluid is applied from the fluid outlet to the object to be cleaned, this, for example, central, area of ​​the nozzle attachment is located in the middle of the suction channel inlet area. The cleaning fluid can thus be applied evenly to the object to be cleaned throughout the entire suction channel inlet area.When cleaning fluid is applied with such a nozzle attachment, the nozzle attachment can be moved in any direction over the object to be cleaned. After each pass over the area of ​​the object to which cleaning fluid has been applied, the limiting device moves over this moistened area. This allows the user to hold the nozzle attachment in any direction. The user does not need to worry about the direction in which to move the nozzle attachment over the object to be cleaned. The cleaning process then proceeds according to the same principle: applying cleaning fluid to the object, loosening the dirt by moving the nozzle attachment over the moistened area, and then immediately drawing the dirty solution into the suction channel inlet and extracting it through the suction channel inlet.

[0023] It is advantageous if the suction channel inlet defines a cross-sectional area that is oval, circular, polygonal, and in particular triangular, square, or pentagonal. A limiting device with two fully circumferential limiting elements can be designed such that the inner and outer limits formed by the two limiting elements are geometrically similar. For example, both can be circular. It is also possible for the two limiting elements to be geometrically dissimilar, for example, an inner limit circular and an outer limit triangular or rectangular. This allows nozzle attachments to be optimized for different applications.

[0024] It is advantageous if the at least one cleaning element is fluid-permeable. In particular, it can be gas- and / or liquid-permeable. This makes it possible, in particular, to reliably and completely extract cleaning fluid applied to an object to be cleaned, even from an area outside the defined boundary. Fluid permeability can be achieved, in particular, if the at least one cleaning element is designed with or includes bristles or a sponge-like element.

[0025] The nozzle attachment can be designed simply and cost-effectively if 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.

[0026] It is advantageous if the cleaning element forms at least one straight and / or at least one curved brush section. In this way, nozzle attachments can be designed in particular that are bounded distally, at least in sections, by a cleaning element that is straight or curved. For example, ring brushes can be designed in a circular, triangular, or square shape.

[0027] It is advantageous if the cleaning element is designed as a ring brush with a closed, ring-shaped bristle ring. Such a ring brush can be designed separately from the nozzle attachment and then replaced depending on the nozzle attachment's intended use or when worn. This type of bristle ring can optimally separate the suction channel inlet area from the surrounding area of ​​the nozzle attachment.

[0028] It is advantageous if the bristles define a longitudinal direction, if the fluid outlet defines a longitudinal axis, and if the bristle direction and the fluid outlet 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 being cleaned without, if possible, directly exposing the bristles to the cleaning fluid. This can, in particular, improve the efficiency of the cleaning action of the nozzle attachment.

[0029] It is advantageous if the nozzle attachment includes or forms a support and if the limiting device, in particular the at least one limiting element, is arranged or formed on the support. This design makes it possible, in particular, to replace the support with the at least one limiting element when it is worn or when a different limiting element is preferred for a specific cleaning purpose.

[0030] The nozzle attachment can be easily designed if the carrier is ring-shaped or sleeve-shaped and defines or surrounds the nozzle suction channel. In particular, a central area of ​​the nozzle attachment in the region of the fluid outlet can be designed to be rotationally symmetrical or substantially rotationally symmetrical. Furthermore, the carrier, for example with bristles attached to it, can be handled easily and reliably, for instance to replace it with another carrier with different bristles. The carrier can, in particular, form the base body of the nozzle attachment. Optionally, the limiting device can also be permanently attached to or formed on the carrier.

[0031] In order to apply cleaning fluid precisely to the surface to be cleaned, it is advantageous if the fluid outlet protrudes distally beyond a distal boundary edge of the carrier.

[0032] Advantageously, the fluid outlet includes a nozzle. The nozzle can be designed, in particular, to apply a cleaning fluid mist or spray to the surface to be cleaned. Preferably, the nozzle is designed to dispense the cleaning fluid in fine droplets to achieve a particularly effective cleaning action. In particular, this prevents or substantially eliminates the formation of cleaning fluid stains on the object being cleaned.

[0033] The nozzle attachment can be made particularly compact if the nozzle and nozzle attachment are formed in one piece, especially monolithically. For example, the nozzle attachment can be produced by injection molding. The nozzle can then be formed in a single operation, thus avoiding subsequent joining and therefore an additional step in the manufacturing process.

[0034] Alternatively, it is advantageous if the nozzle is designed as a separate component and detachably connectable to a distal end of the nozzle fluid channel. In particular, it can be screwed or snapped into place at the distal end of the nozzle fluid channel. Such a design makes it possible, in particular, to manufacture the nozzle from a different material than the nozzle fluid channel or the nozzle attachment. For example, the nozzle can be made of a metallic material, while the nozzle attachment can be made of one or more plastics.

[0035] 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 is in a range of approximately 1:10 3 up to about 1:10 6 lies, in particular in a range of about 1:10 4 up to about 1:10 5 A specific cross-sectional area ratio in the specified areas allows for the cleaning of objects in such a way that excessive wetting with cleaning fluid does not occur. In particular, this ensures that the cleaning fluid applied to the object being cleaned can be completely extracted through the suction channel inlet.

[0036] Furthermore, it is advantageous if a sealing element projecting distally and surrounding the fluid outlet area and the suction channel inlet area is arranged or formed on the distal side of the nozzle attachment. Such a sealing element has the particular advantage of enabling optimal adaptation of the nozzle attachment to the contour of the object to be cleaned. Furthermore, this also minimizes the ingress of false air in the distal end region of the nozzle attachment. The sealing element can, for example, adjoin both the fluid outlet area and the suction channel inlet area directly. In alternative embodiments, the sealing element can adjoin only the suction channel inlet area, which in turn is separated from the fluid outlet area solely by the at least one cleaning element.

[0037] To achieve the best possible cleaning effect with the nozzle attachment, it is advantageous if the at least one first limiting element, particularly in the form of a cleaning element, projects distally and in a distal direction beyond the at least one second limiting element, particularly in the form of a sealing element. This is especially advantageous in a working position in which the limiting element in the form of a sealing element is deformed, for example, slightly deformed or retracted in the proximal direction, or even in a resting position in which the sealing element is undeformed. This ensures that direct contact between the limiting element in the form of the cleaning element and the surface to be cleaned is always possible before the sealing element comes into contact with the surface.If at least one cleaning element is sufficiently deformable, optimal mechanical cleaning action can be achieved with it. Ideally, the cleaning element should protrude at least 0.5 mm distally beyond the sealing element. It is advantageous if it protrudes no more than 3 mm beyond the sealing element. This ensures both a seal with the sealing element and reliable mechanical cleaning of the object with the cleaning element.

[0038] To ensure optimal adaptation of the nozzle attachment to the surface being cleaned, it is advantageous for the sealing element to be deformable. In particular, it can be flexible and / or elastic. For this purpose, it can be made of suitable materials, such as rubber or an elastically deformable plastic.

[0039] Preferably, the sealing element is designed in the form of a sealing lip. In particular, the sealing element can be designed in a sleeve-like shape with a correspondingly thin wall thickness that allows for flexible and / or elastic deformation of the sealing element, namely the sealing lip.

[0040] To ensure optimal sealing of the suction channel inlet area, the limiting device is preferably sleeve-shaped and extends parallel or substantially parallel to the longitudinal axis of the fluid outlet. In particular, the limiting device can be arranged or configured concentrically to the longitudinal axis of the fluid outlet. The limiting device can be attached to the suction channel inlet, for example to the support, by means of a force-fit and / or form-fit connection. Optionally, a material-bonded connection, for example by gluing or welding, can also be provided.

[0041] Advantageously, the limiting device is designed to be detachably connected to the nozzle attachment. In particular, a force-fit and / or form-fit connection can be provided. This allows the limiting device to be replaced if necessary, for example, if it is damaged, worn, or if a different flexibility of the limiting device is desired, such as in conjunction with a cleaning element.

[0042] It is advantageous if the at least one boundary element has a boundary element edge on its distal side. This boundary element edge allows the at least one boundary element to be positioned against the object to be cleaned. The edge can be flat or curved. In particular, it can have an edge height in a direction parallel to the longitudinal axis of the fluid outlet, which varies or remains constant in the circumferential direction relative to the longitudinal axis of the fluid outlet.

[0043] It is advantageous if the limiting element edge defines an edge plane. This makes it possible, in particular, to place the nozzle attachment and the limiting element edge fully against a flat surface to be cleaned and to completely seal the suction channel inlet area from the surrounding area of ​​the nozzle attachment.

[0044] It is advantageous if the edge plane runs transversely, and especially perpendicularly, to the longitudinal axis of the fluid outlet. Particularly when the angle of inclination of the edge plane relative to the longitudinal axis of the fluid outlet is between 0° and 45°, the nozzle attachment can be designed to be especially ergonomic for user handling. If the edge plane is perpendicular to the longitudinal axis of the fluid outlet, the user can immediately see whether the limiting element edge is optimally positioned on the surface to be cleaned. In this case, the nozzle suction channel must then protrude perpendicularly from the surface to be cleaned.

[0045] Furthermore, it is advantageous if the at least one first boundary element defines a first boundary element edge distally, if the at least one second boundary element defines a second boundary element edge distally, and if the first boundary element edge projects distally beyond the second boundary element edge, or vice versa. This makes it particularly possible for the first boundary element edge to come into contact with the surface to be cleaned before the second boundary element edge touches the surface to be cleaned.For example, mechanical cleaning of the surface to be cleaned can be ensured, for example by appropriate deformation of the at least one first limiting element, which is designed in the form of a cleaning element, until the second limiting element edge, which can be designed in the form of a sealing element edge of a sealing element, comes into contact with the surface to be cleaned and thus enables a seal of the nozzle attachment relative to the surface to be cleaned.

[0046] Furthermore, it is advantageous if the at least one first limiting element has a first limiting element length parallel to the longitudinal axis of the fluid outlet, if the at least one second limiting element has a second limiting element length parallel to the longitudinal axis of the fluid outlet, and if the first limiting element length is greater than the second limiting element length, or vice versa. This ensures, in particular, that a distal end of the at least one first limiting element, if it is designed as a cleaning element, projects distally beyond the at least one second limiting element, if it is designed as a sealing element, and especially beyond an edge of the sealing element.

[0047] According to a further preferred embodiment, the first boundary element edge can define a first boundary element edge plane distally, which runs transversely, and in particular perpendicularly, to a longitudinal axis of the fluid outlet. As already explained, an optimal cleaning effect can thus be achieved on the surface to be cleaned by means of the at least one first boundary element, if it is designed in the form of a cleaning element.

[0048] It is advantageous if the distal edge of the second boundary element defines a second boundary element edge plane that runs transversely, and in particular perpendicularly, to a longitudinal axis of the fluid outlet. This allows for optimal sealing of the at least one second boundary element, especially if it is designed as a sealing element, on the surface to be cleaned.

[0049] It is advantageous if the first and second boundary element edge planes are parallel to each other. This design makes it possible, in particular, to place the nozzle attachment with its at least two boundary elements parallel to the surface to be cleaned and to move the nozzle attachment parallel to itself relative to the surface to be cleaned.

[0050] Preferably, one of the two boundary element edge planes extends distal to the other of the two boundary element edge planes. This design allows, in particular, the at least two boundary elements to come into contact with the surface to be cleaned sequentially. For example, if the first boundary element is designed in the form of a cleaning element, its cleaning effect in conjunction with the surface to be cleaned can thus be ensured before the second boundary element, which can be designed in the form of a sealing element, comes into contact with the surface to be cleaned in order to seal the nozzle attachment and its suction channel inlet area relative to the environment.

[0051] For optimal cleaning results, it is advantageous if the first and second boundary element edges are spaced apart in a direction parallel to the longitudinal axis of the fluid outlet, and if this spacer has a value in the range of approximately 0.5 mm to approximately 3 mm. In particular, the spacer can be approximately 1 mm. This specified spacing has the advantage of achieving both good cleaning performance with the first boundary element (if it is designed as a cleaning element) and the best possible seal with the second boundary element (if it is designed as a sealing element).

[0052] The cleaning effect of the nozzle attachment can be further improved, in particular, by making the limiting device, especially the at least one limiting element, movable on the nozzle attachment, especially by means of a drive mechanism. This eliminates the need for the user to manually move the nozzle attachment over the surface to be cleaned; instead, the drive mechanism achieves relative movement between the limiting device and the surface being cleaned.

[0053] It is advantageous if the nozzle attachment includes a drive for moving the nozzle attachment or parts thereof, in particular for moving the limiting device, and further, in particular, the at least one limiting element. In particular, the drive can be designed as a vibration, rotary, or oscillating drive. For example, the drive can include an electric motor coupled to the at least one cleaning element 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. In this way, for mechanical cleaning, a user does not need to move the nozzle attachment over the surface to be cleaned, but only hold it against it.

[0054] According to a further preferred embodiment of the invention, the nozzle attachment can be angled and comprise a distal and a proximal nozzle attachment section, the fluid outlet and the suction channel inlet are arranged or formed on the distal nozzle attachment section, the proximal nozzle attachment section is connected or connectable to a handpiece, and the distal and proximal nozzle attachment sections are angled relative to each other. Such an angled design of the nozzle attachment particularly enables ergonomic operation. For example, the nozzle attachment can be grasped with one hand in the region of the proximal nozzle attachment section. The distal nozzle attachment section, which is inclined relative to this, can then be brought towards the surface to be cleaned without requiring the user to work with an excessively bent wrist.

[0055] It is advantageous if the proximal nozzle section defines a proximal longitudinal axis and the distal nozzle section defines a distal longitudinal axis, if both the proximal and distal longitudinal axes form a bend angle, and if this bend angle is in the range of approximately 90° to 180°. In particular, the bend angle can be in the range of approximately 125° to 155°. Depending on the application or intended use of the nozzle, bend angles within the specified range can achieve optimal ergonomic handling for the user.

[0056] The nozzle attachment can be manufactured particularly easily and cost-effectively if it, and especially the limiting element, is made of plastic. In particular, at least one limiting element can be made of plastic. For example, the housing of the nozzle attachment can be defined by the nozzle attachment suction channel, which forms an outer shell of the nozzle attachment.

[0057] The problem set out at the beginning is further solved according to the invention in a suction nozzle of the type described at the beginning by the fact that the nozzle attachment is designed in the form of one of the nozzle attachments described above.

[0058] Designing or equipping a suction nozzle with one of the nozzle attachments described above offers the advantages already described above in connection with preferred embodiments of nozzle attachments.

[0059] 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 detachably connected. This allows the most suitable nozzle attachment to be coupled to the handpiece, depending on the cleaning task to be performed. For example, the handpiece can be designed to control the dispensing of cleaning fluid. For this purpose, a valve assembly can be arranged or designed on the handpiece, which interacts with a conveying device of a cleaning unit, for example, by controlling its operation.

[0060] To improve the handling of the suction nozzle, it is advantageous if the nozzle attachment is rotatably arranged or designed on the handpiece. In particular, if the nozzle attachment is angled, a distal end of the nozzle attachment, i.e., the suction channel inlet or the fluid channel outlet, can be rotated in the desired direction while maintaining the same hand position.

[0061] The problem set out at the beginning is further solved according to the invention in a cleaning hose for a cleaning device of the type described at the beginning by the fact that the suction nozzle is designed in the form of one of the suction nozzles described above.

[0062] A cleaning hose designed in this way then has the advantages already described above in connection with preferred embodiments of suction nozzles.

[0063] It is advantageous if the second end of the hose suction channel can be connected to a suction port of the cleaning device, and if the second end of the hose fluid channel can be connected to a fluid port of the cleaning device, and if this design makes it possible, in particular, to convey a cleaning fluid, which is contained, for example, in a suitable container on the cleaning device, through the hose fluid channel to the fluid outlet on the nozzle attachment using a conveying device, and to draw the dirty cleaning solution through the hose suction channel and then through the suction port of the cleaning device into a dirty cleaning solution container of the cleaning device.

[0064] The problem set out at the beginning is further solved in a cleaning device of the type described above by the fact that the cleaning hose is designed in the form of one of the cleaning hoses described above.

[0065] The cleaning device then has the advantages already described above in connection with preferred embodiments of cleaning hoses.

[0066] It is advantageous if the cleaning device includes a control unit for regulating the delivery system to activate and deactivate fluid dispensing. This allows the user to selectively apply cleaning fluid to the surface being cleaned. For example, a valve or control element can be arranged or designed on the suction nozzle handpiece to activate or deactivate the delivery system, thus dispensing cleaning fluid onto the surface to be cleaned through the fluid outlet as needed, or preventing fluid dispensing altogether.

[0067] It is advantageous if the nozzle attachment includes a sensor, in particular a touch sensor and / or a pressure sensor, and if the control unit is effectively connected to the sensor to automatically initiate fluid dispensing when the sensor is activated. This design significantly simplifies the operation of the cleaning device, as the user does not need to actively control or activate the fluid dispensing. With the proposed design, fluid dispensing begins automatically when the nozzle attachment is handled appropriately, for example, when a vacuum threshold in the nozzle suction channel is undershot or when the nozzle attachment touches the surface to be cleaned. This can be detected by a pressure sensor or a touch sensor.

[0068] The foregoing description therefore includes in particular the embodiments of nozzle attachments, suction nozzles, cleaning hoses and cleaning devices defined below in the form of numbered sentences: 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 vacuum cleaner, wherein the nozzle attachment (50) comprises a nozzle suction channel (66) and a nozzle fluid channel (68) fluidly separated from it, wherein the nozzle fluid channel (68) distally comprises a fluid outlet (74) for dispensing a cleaning fluid and wherein the nozzle suction channel (66) distally comprises a suction channel inlet (76) for receiving a dirty solution, characterized in that at least one limiting device (78) projecting distally and forming an outer boundary of a suction channel inlet area (80) defined by the suction channel inlet (76) is arranged or formed on the nozzle attachment (50) distally and that the fluid outlet (74) is arranged or formed within the suction channel inlet area (80) without spatial separation. to the suction duct inlet area (80). 2. Nozzle attachment according to sentence 1, characterized in that the suction channel inlet (76) defines a suction channel inlet direction (100) and that the limiting device (78) completely surrounds the suction channel inlet area (80) in the circumferential direction with respect to the suction channel inlet direction (100). 3. Nozzle attachment according to sentence 2, characterized in that the limiting device (78) comprises at least one limiting element (102, 104) which extends in the circumferential direction at least sectionally, in particular completely, around the suction channel inlet area (80) with respect to the suction channel inlet direction (100). 4. Nozzle attachment according to sentence 3, characterized in that the at least one limiting element (102, 104) is designed in the form of a sealing element (106) or in the form of a cleaning element (108). 5. Nozzle attachment according to one of the preceding sentences, characterized in that the limiting device (78) comprises at least one first limiting element (102) and at least one second limiting element (104). 6. Nozzle attachment according to sentence 5, characterized in that the at least one first limiting element (102) and the at least one second limiting element (104) are arranged or designed in the circumferential direction with reference to the suction channel inlet direction (100) at least sectionally, in particular completely, overlapping to form a double limiting of the suction channel inlet (76) in the circumferential direction, at least sectionally, in particular completely. 7. Nozzle attachment according to sentence 5 or 6, characterized in that the at least one first limiting element (102) is arranged or formed in the circumferential direction at least sectionally, in particular completely, directly adjacent to the suction channel inlet (76). 8. Nozzle attachment according to one of sentences 5 to 7, characterized in that the at least one second limiting element (104) is arranged or formed in the circumferential direction at least sectionally, in particular completely, directly adjacent to the suction channel inlet (76) with respect to the suction channel inlet direction (100). 9. Nozzle attachment according to one of sentences 5 to 8, characterized in that the at least one first limiting element (102) and the at least one second limiting element (104) are arranged or formed adjacent to each other in the circumferential direction without overlapping, with respect to the suction channel inlet direction (100). 10. Nozzle attachment according to one of sentences 3 to 10, characterized in that the limiting device (78) comprises only a single limiting element (102, 104) which completely surrounds the suction channel inlet area (80) in the circumferential direction with respect to the suction channel inlet direction (100). 11. Nozzle attachment according to sentence 10, characterized in that the only limiting element (102; 104) is designed in the form of a sealing element (106) or in the form of a cleaning element (108). 12. Nozzle attachment according to one of sentences 5 to 11, characterized in that the at least one first limiting element (102) is designed in the form of a sealing element (106) and that the at least one second limiting element (78) is designed in the form of a cleaning element (108). 13. Nozzle attachment according to one of the preceding sentences, characterized in that the limiting device (78) concentrically surrounds the fluid outlet. 14. Nozzle attachment according to one of the preceding sentences, characterized in that the suction channel inlet (76) defines a cross-sectional area which is oval, circular, polygonal, in particular triangular, square or pentagonal. 15. Nozzle attachment according to one of sentences 4 to 14, characterized in that the cleaning element (108) is designed to be fluid-permeable. 16. Nozzle attachment according to one of sentences 4 to 15, characterized in that the cleaning element (108) is designed in a brush-like manner and comprises a plurality of bristles (110) and / or bristle bundles (112). 17. Nozzle attachment according to one of sentences 4 to 16, characterized in that the cleaning element (108) forms at least one straight and / or at least one curved brush section (114). 18. Nozzle attachment according to one of sentences 4 to 17, characterized in that the cleaning element (108) is designed in the form of a ring brush (144) with a self-contained ring-shaped bristle ring (146). 19. Nozzle attachment according to one of sentences 16 to 18, characterized in that the bristles (110) define a bristle longitudinal direction (116), that the fluid outlet (74) defines a fluid outlet longitudinal axis (118) and that the bristle longitudinal direction (118) and the fluid outlet longitudinal axis (118) are aligned parallel or substantially parallel to each other. 20. Nozzle attachment according to one of the preceding sentences, characterized in that the nozzle attachment (50) comprises or forms a carrier (122) and that the limiting device (78), in particular the at least one limiting element (102, 104), is arranged or formed on the carrier (122). 21. Nozzle attachment according to sentence 20, characterized in that the carrier (122) is ring-shaped or sleeve-shaped and limits or surrounds the nozzle suction channel (66). 22. Nozzle attachment according to sentence 20 or 21, characterized in that the fluid outlet (74) projects distally beyond a distal boundary edge of the carrier (122). 23. Nozzle attachment according to one of the preceding sentences, characterized in that the fluid outlet (74) comprises a nozzle (90). 24. Nozzle attachment according to sentence 23, characterized in that the nozzle (90) is formed in one piece with the nozzle attachment (50), in particular monolithically. 25. Nozzle attachment according to sentence 23, characterized in that the nozzle (90) is designed as a separate component and is detachably connectable to a distal end (92) of the nozzle fluid channel (68), in particular screwable or lockable. 26. Nozzle attachment according to one of the preceding sentences, 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 of approximately 1:10 3 up to about 1:10 6 lies, in particular in a range of about 1:10 4 up to about 1:10 5 . 27. Suction nozzle according to one of sentences 5 to 26, characterized in that the at least one first limiting element (104), in particular in the form of a cleaning element (108), projects distally and in a distal direction over the at least one second limiting element (102), in particular in the form of a sealing element (106). 28. Nozzle attachment according to one of sentences 4 to 27, characterized in that the sealing element (106) is designed to be deformable, in particular flexible and / or elastic. 29. Nozzle attachment according to one of sentences 4 to 28, characterized in that the sealing element (106) is designed in the form of a sealing lip (128). 30. Nozzle attachment according to one of sentences 19 to 29, characterized in that the limiting device (78) is sleeve-shaped and extends parallel or substantially parallel to the fluid outlet longitudinal axis (118), in particular concentrically. 31. Nozzle attachment according to one of the preceding sentences, characterized in that the limiting device (78) is designed to be detachably (50) connectable to the nozzle attachment. 32. Nozzle attachment according to one of sentences 3 to 31, characterized in that the at least one limiting element (102, 104) has a limiting element edge (130, 132) distally. 33. Nozzle attachment according to sentence 32, characterized in that the boundary element edge (130, 132) defines a boundary plane (134, 136). 34. Nozzle attachment according to sentence 33, characterized in that the boundary plane (134, 136) runs transversely, in particular perpendicularly, to the fluid outlet longitudinal axis (118). 35. Nozzle attachment according to one of sentences 5 to 34, characterized in that the at least one first limiting element (104) defines a first limiting element edge (132) distally, that the at least one second limiting element (102) defines a second limiting element edge (130) distally, and that the first limiting element edge (132) projects distally beyond the second limiting element edge (130), or vice versa. 36. Nozzle attachment according to one of sentences 19 to 35, characterized in that the at least one first limiting element (104) has a first limiting element length (140) parallel to the fluid outlet longitudinal axis (118), that the at least one second limiting element (102) has a second limiting element length (102) parallel to the fluid outlet longitudinal axis (118) and that the first limiting element length (140) is greater than the second limiting element length (138) or vice versa. 37. Nozzle attachment according to sentence 35 or 36, characterized in that the first limiting element edge (132) defines a first limiting element edge plane (136) distally, which runs transversely, in particular perpendicularly, to a fluid outlet longitudinal axis (118) of the fluid outlet (74). 38. Nozzle attachment according to one of sentences 35 to 37, characterized in that the second limiting element edge (130) defines a second limiting element edge plane (134) distally, which runs transversely, in particular perpendicularly, to a fluid outlet longitudinal axis (118) of the fluid outlet (74). 39. Nozzle attachment according to sentence 38, characterized in that the first boundary element edge plane (136) and the second boundary element edge plane (134) run parallel to each other. 40. Nozzle attachment according to sentence 38 or 39, characterized in that one of the two boundary element edge planes (134, 136) runs distal to the other of the two boundary element edge planes (134, 136). 41. Nozzle attachment according to one of sentences 38 to 40, characterized in that the first and the second limiting element edge plane (134, 136) have a distance (142) from each other in a direction parallel to the fluid outlet longitudinal axis (118) and that the distance (142) has a value in a range of about 0.5 mm to about 3 mm, in particular a value of about 1 mm. 42. Nozzle attachment according to one of the preceding sentences, characterized in that the limiting device (78), in particular the at least one limiting element (102, 104), is movable, in particular with a drive (154), arranged or formed on the nozzle attachment (50). 43. Nozzle attachment according to sentence 42, characterized in that the nozzle attachment comprises a drive (154) for moving the nozzle attachment (50) or parts thereof, in particular for moving the limiting device (78), and further in particular the at least one limiting element (102, 104), in particular in the form of a vibration, rotation or vibration drive. 44. Nozzle attachment according to one of the preceding sentences, characterized in that the nozzle attachment (50) is angled and comprises a distal and a proximal nozzle attachment section, that the fluid outlet (74) 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 (48) and that the distal and the proximal nozzle attachment sections are angled relative to each other. 45. Nozzle attachment according to sentence 44, characterized in that the proximal nozzle attachment section defines a proximal nozzle attachment section longitudinal axis and that the distal nozzle attachment section defines a distal nozzle attachment section longitudinal axis, that the proximal nozzle attachment section longitudinal axis and the distal nozzle attachment section longitudinal axis include a bend angle and that the bend angle has a value in a range of about 90° to 180°, in particular in a range of about 125° to about 155°. 46. ​​Nozzle attachment according to one of the preceding sentences, characterized in that the nozzle attachment (50), in particular the limiting device (78), is made of a plastic. 47. Suction nozzle (46) for a cleaning device (10), in particular for a spray extraction device (12) or a steam vacuum 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 sentences. 48. Suction nozzle according to sentence 47, characterized in that the handpiece (48) and the nozzle attachment (50) are designed to be detachably connectable to each other. 49. Suction nozzle according to sentence 47 or 48, characterized in that the nozzle attachment (50) is rotatably arranged or designed on the handpiece (48). 50. 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 suction channel (30) with a first and a second suction channel end (32, 34) and a fluid channel (36) with a first and a second fluid channel end (38, 40), wherein the first suction channel end (32) and the first fluid channel end (38) are connected or connectable to a handpiece of a suction nozzle (46), characterized in that the suction nozzle (46) is designed in the form of a suction nozzle (46) according to one of sentences 47 to 49. 51. Cleaning hose according to sentence 50, characterized in that the second hose suction channel end (34) can be connected or is connected to a suction port (20) of the cleaning device (10) in a fluid-effective manner and that the second hose fluid channel end (40) can be connected or is connected to a fluid port (22) of the cleaning device (10) in a fluid-effective manner. 52. Cleaning device (10), in particular in the form of a spray extraction device (12) or a steam vacuum cleaner, comprising a suction device (16), a conveying device (18), a suction port (20) and a cleaning fluid port (22), wherein the suction device (46) is fluidly connected to the suction port (20) and wherein the conveying device (18) is fluidly connected to the cleaning fluid port (22), wherein the cleaning device (10) further comprises a cleaning hose (28) which is connected or connectable to both the suction port (20) and the cleaning fluid port (22), characterized in that the cleaning hose (28) is designed in the form of a cleaning hose (28) according to one of sentences 50 or 51. 53. Cleaning device according to sentence 52, characterized in that the cleaning device (10) comprises a control device (156) for controlling the conveying device (18) for activating and deactivating a fluid discharge. 54. Cleaning device according to sentence 53, characterized in that the nozzle attachment (50) comprises a sensor (158), in particular a touch sensor and / or a pressure sensor, and that the control device (156) is connected to the sensor (158) in a control-effective manner for automatically starting a fluid discharge when the sensor (158) is actuated.

[0069] The following description of a preferred embodiment of the invention, in conjunction with the drawings, serves for further explanation. The drawings show: Fig. 1: A schematic perspective, partially openwork overall view of a cleaning device in the form of a spray extraction device; Fig. 2: a schematic perspective representation of another embodiment of a suction nozzle coupled to a cleaning hose when cleaning a shoe; Fig. 3: a schematic perspective view of the in Fig. 1 illustrated embodiment of the suction nozzle connected to the cleaning hose during cleaning of a seat; Fig. 4: A schematic perspective, partially cutaway view of a first embodiment of a nozzle attachment, as exemplified in Fig. 3 is shown; Fig. 5: a view of the arrangement from Fig. 4 in the direction of arrow A; Fig. 6: a schematic sectional view along line 6-6 in Fig. 5; Fig. 7: a schematic perspective, partially openwork view of a second embodiment of a nozzle attachment; Fig. 8: a view of the arrangement of Fig. 7 in the direction of arrow B; Fig. 9: a schematic sectional view along line 9-9 in Fig. 8; Fig. 10: A perspective, partially cutaway view of a third embodiment of a nozzle attachment, as exemplified in Fig. 2 shown; Fig. 11: a view of the arrangement from Fig. 10 in the direction of arrow C; Fig. 12: a sectional view along line 12-12 in Fig. 11; Fig. 13: a perspective, partially openwork view of a fourth embodiment of a nozzle attachment; Fig. 14: a view of the arrangement from Fig. 13 in the direction of arrow D; Fig. 15: a sectional view along line 15-15 in Fig. 14; Fig. 16: a perspective, partially openwork view of a fifth embodiment of a nozzle attachment; Fig. 17: a view of the arrangement from Fig. 16 in the direction of arrow E; Fig. 18: a sectional view along line 18-18 in Fig. 17; Fig. 19: a schematic perspective, partially openwork view of a sixth embodiment of a nozzle attachment; Fig. 20: a view of the arrangement from Fig. 19 in the direction of arrow F; Fig. 21: a sectional view along line 21-21 in Fig. 20; Fig. 22: a schematic perspective, partially openwork view of a seventh embodiment of a nozzle attachment; Fig. 23: a view of the arrangement from Fig. 22 in the direction of arrow G; Fig. 24: a sectional view along line 24-24 in Fig. 23; Fig. 25: a schematic perspective, partially openwork view of an eighth embodiment of a nozzle attachment; Fig. 26: a view of the arrangement from Fig. 25 in the direction of arrow H; Fig. 27: a sectional view along line 27-27 in Fig. 26; Fig. 28: a schematic perspective, partially openwork view of a ninth embodiment of a nozzle attachment; Fig. 29: a view of the arrangement from Fig. 28 in the direction of arrow K; Fig. 30: a sectional view along line 30-30 in Fig. 29; Fig. 31: a schematic perspective, partially openwork view of a tenth embodiment of a nozzle attachment; Fig. 32: a view of the arrangement from Fig. 31 in the direction of arrow L; Fig. 33: a sectional view along line 33-33 in Fig. 32; Fig. 34: a schematic perspective, partially openwork view of an eleventh embodiment of a nozzle attachment; Fig. 35: a view of the arrangement from Fig. 34 in the direction of arrow M; Fig. 36: a sectional view along line 36-36 in Fig. 35; Fig. 37: a schematic representation of a further embodiment of a cleaning device; and Fig. 38: a schematic representation of another embodiment of a cleaning device.

[0070] In Fig. Figure 1 schematically illustrates an embodiment of a cleaning device designated by reference numeral 10. It is designed in the form of a spray extraction device 12.

[0071] The construction of the cleaning device 10 from Fig. 1 is schematically in Fig. 27 shown.

[0072] 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 port 20 on the housing 14. The conveying device 18 is fluidly connected to a cleaning fluid port 22 on the housing 14. A cleaning fluid reservoir 24 is arranged in the housing 14 and is designed to hold a cleaning fluid, for example, water. The cleaning fluid reservoir 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 reservoir 24 to the cleaning fluid port 22 by means of the conveying device 18. The housing 14 also contains 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 solution from the suction port 20 into the dirty water container 26.

[0073] The cleaning device 10 also includes a cleaning hose 28, which is connected or connectable to both the suction port 20 and the cleaning fluid port 22.

[0074] The cleaning hose 28 comprises a suction channel 30 with a first suction channel end 32 and a second suction channel end 34. The cleaning hose 28 further comprises a fluid channel 36 with a first fluid channel end 38 and a second fluid channel end 40.

[0075] The cleaning hose 28 includes an outer suction hose 42, which surrounds and 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.

[0076] The cleaning device 10 also includes a suction nozzle 46 with a handpiece 48 and a nozzle attachment 50.

[0077] A valve assembly 52 is arranged on the handpiece 48 for opening and 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 fluidically connected, or connectable, to the first end of the tubing fluid channel 38. A proximal end of the handpiece suction channel 56 is connected, or connectable, to the first end of the tubing suction channel 32.

[0078] The handpiece 48 and the nozzle attachment 50 are optionally permanently connected to each other or alternatively designed to be detachably connected.

[0079] In exemplary embodiments, the nozzle attachment 50 is either rotatably arranged or designed on the handpiece 48 or is non-rotatable.

[0080] The cleaning hose 28 is designed such that the second hose suction channel end 34 can be connected or is connected to the suction port 20 of the cleaning device in a fluid-effective manner, and that the second hose fluid channel end 40 can be connected or is connected to the cleaning fluid port 22 of the cleaning device 10 in a fluid-effective manner.

[0081] The in Fig. The cleaning device 10, shown schematically, can be operated independently of the 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.

[0082] A first embodiment of a nozzle attachment 50 is described below in conjunction with the Fig. 3 to 6 explained in more detail. It is also in Fig. 1 schematically represented.

[0083] A proximal end 60 of the nozzle attachment 50 is detachably connected to a distal end 62 of the handpiece 48. A coupling device 64, not shown or described in detail, is provided for this purpose.

[0084] The nozzle attachment 50 comprises a nozzle suction channel 66 and a nozzle fluid channel 68 that is fluid-effectively separated from this.

[0085] 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 shown in Fig. Figure 3 shows that a proximal end 72 of the nozzle fluid channel 68 is fluidly connected to a distal end of the handpiece fluid channel 54.

[0086] The nozzle fluid channel 68 includes a fluid outlet 74 distally for dispensing a cleaning fluid. The nozzle suction channel 66 includes a suction channel inlet 76 distally for drawing in a dirty solution.

[0087] The nozzle attachment 50 further comprises a limiting device 78. It is arranged or formed distally on the nozzle attachment 50 and forms an outer limit projecting in a distal direction of a suction channel inlet area 80 defined by the suction channel inlet 76.

[0088] The fluid outlet 74 is arranged or formed within the suction channel inlet area 80, without any spatial separation from the suction channel inlet area 80.

[0089] The nozzle attachment 50 further comprises a base body 82, which extends from a proximal end 84, which can be coupled to the handpiece 48, to a distal end 86. The proximal end 84 has a circular cross-section and is thus adapted to a correspondingly shaped coupling section of the handpiece 48. The base body 82 widens towards the distal end 86. The distal end 86 forms a circumferential, rectangular nozzle attachment rim 88, which points distally.

[0090] The nozzle fluid channel 68 is formed integrally on the base body 82 and is fluidly separated from the nozzle suction channel 66.

[0091] The fluid outlet 74 is formed on a nozzle 90, which projects distally slightly beyond the nozzle attachment rim 88 in a distal direction. The nozzle 90 is designed as a separate component and is detachably connected to a distal end region 92 of the nozzle fluid channel 68. For this purpose, an internal thread 94 is formed on the nozzle fluid channel 68, which corresponds to an external thread 96 of the nozzle 90. The external thread 96 extends from a proximal nozzle end 98 over approximately half the length of the nozzle 90, parallel to a suction channel inlet direction 100, which is defined by the nozzle suction channel 66.

[0092] In alternative embodiments not shown in the figures, the nozzle 90 is formed in one piece with the base body 82, in particular monolithically.

[0093] The fluid outlet 74 defines a free fluid outlet cross-section. The suction channel inlet 76 defines a free suction channel inlet cross-section. A ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section is found in the Fig. 3 to 6 illustrated embodiments at approximately 1:10 3 up to about 1:10 6 .

[0094] The limiting device 78 completely surrounds the suction channel inlet area 80 in the circumferential direction with respect to the suction channel inlet device 100.

[0095] Furthermore, the limiting device 78 comprises a limiting element 102 and a limiting element 104. The limiting element 102 extends circumferentially around the intake port inlet area 80 completely, relative to the intake port inlet direction 100. The limiting element 104, on the other hand, extends only over a section, i.e., a part of the circumference, circumferentially around the intake port inlet area 80 relative to the intake port inlet direction 100.

[0096] The limiting element 102 is designed in the form of a sealing element 106. The limiting element 104 is designed in the form of a cleaning element 108.

[0097] The limiting element 102 and the limiting element 104 are arranged or designed to overlap section by section in the circumferential direction with respect to the intake manifold inlet direction 100. They thus form a double limit of the intake manifold inlet 76 in the circumferential direction section by section, i.e. over part of the circumference.

[0098] The nozzle attachment rim 88 defines a substantially rectangular suction channel inlet 76. The cleaning element 108 extends directly adjacent to the suction channel inlet 76 along a straight section of the nozzle attachment rim 88. The sealing element 106 extends distally away from the nozzle attachment rim 88 and completely surrounds the suction channel inlet 76 in the circumferential direction. Thus, a complete outer boundary is formed by the sealing element 106.

[0099] The sealing element 106 is arranged adjacent to the cleaning element 108, specifically on an outer side of the cleaning element 108 pointing away from the suction channel inlet 76. An overlap of the two limiting elements 102 and 104 is thus achieved over the entire length of the cleaning element 108.

[0100] The cleaning element 108 is designed to be fluid-permeable. It is brush-like and comprises a plurality of bristles 110, which are grouped into bristle bundles 112. The exemplary embodiment of the nozzle attachment 50 of the Fig. Sections 3 to 6 comprise 13 bristle bundles 112, which are arranged side by side in a row. Thus, the cleaning element 108 forms a straight brush section 114.

[0101] The bristles 110 define a bristle longitudinal direction 116. The fluid outlet 74 defines a fluid outlet longitudinal axis 118. The bristle longitudinal direction 116 and the fluid outlet longitudinal axis 118 are aligned parallel or substantially parallel to each other. They also run parallel to the suction channel inlet direction 100.

[0102] The bristle bundles 112 are inserted into sacklock-like receptacles 120, which are open at the nozzle attachment edge 88 in a distal direction. The base body 82 forms a carrier 122 on which the limiting device 78, in particular the components it encompasses, is arranged or formed.

[0103] A circumferential, flange-like rim 124 extends distally from the nozzle attachment rim 88 as the outermost boundary of the base body 82. The rim 124 has an inner edge surface 126 surrounding the suction channel inlet area 80. The limiting element 102, in the form of the sealing element 106, is attached to this inner edge surface 126. It can be bonded or injection-molded, for example, by two-component injection molding. The rim 126 defines the distal end 86.

[0104] For the formation of the nozzle suction channel 66, the carrier 122 or the base body 82 is designed in a sleeve shape.

[0105] The limiting element 104, which is designed in the form of a cleaning element 108, projects distally and in a distal direction slightly beyond the limiting element 102, which is designed in the form of the sealing element 106.

[0106] The sealing element 106 is designed to be deformable. It is flexible and / or elastic. For optimal sealing of the suction channel inlet area 80 on an object to be cleaned, the sealing element 106 is designed in the form of a sealing lip 128.

[0107] The limiting device 78 is designed in the described manner as a sleeve and extends parallel or substantially parallel to the longitudinal axis 118 of the fluid outlet. In the described embodiment, the limiting device 78 is permanently and in a manner that is not detachable with the nozzle attachment 50.

[0108] In alternative embodiments not shown, the limiting device 78 is detachably connected to the nozzle attachment 50. The limiting element 102 defines a limiting element edge 130 distally. The limiting element 104 has a limiting element edge 132 distally. The limiting element edge 130 defines a boundary plane 134. The limiting element edge 132 defines a boundary plane 136. The boundary planes 134 and 136 run transversely, and in the embodiment shown in the figures, perpendicularly to the longitudinal axis 118 of the fluid outlet.

[0109] As particularly in Fig. As can be clearly seen in Figure 6, the limiting element edge 132 protrudes distally beyond the limiting element edge 130. In other embodiments not shown, this may also be the reverse.

[0110] The limiting element 102 defines a limiting element length 138. The limiting element 104 defines a limiting element length 140 parallel to the fluid outlet longitudinal axis 118. The limiting element length 140 is greater than the limiting element length 138. In alternative embodiments, this can also be reversed.

[0111] The two marginal planes 134 and 136 run parallel to each other. Marginal plane 136 runs distal to marginal plane 134.

[0112] The two boundary planes 134 and 136 are spaced 142 apart in a direction parallel to the fluid outlet longitudinal axis 118. The spacer 142 has a value in the range of approximately 0.5 mm to approximately 3 mm.

[0113] A second embodiment of a suction nozzle 50 is shown schematically in the Fig. Figures 7 to 9 illustrate its construction. Its design is similar to the exemplary embodiment of the Fig. 3 to 6 similar, so that to designate the exemplary embodiment of the Fig. 7 to 9 - and also in all other embodiments - the same reference numerals are used for identical or functionally similar or comparable components.

[0114] The embodiment of the suction nozzle 50 according to the Fig. Figures 7 to 9 differ from the embodiment of the Fig. 3 to 6 are distinguished solely by the design of the limiting device 78. It also comprises two limiting elements 102 and 104. However, these are arranged or formed adjacent to each other in the circumferential direction with respect to the suction channel inlet device 100, without overlapping. In other words, the cleaning element 108 limits a straight section of the rectangular suction channel inlet 106. The three other sides of the rectangular suction channel inlet 76 are limited by the sealing element 106. Thus, the limiting elements 102 and 104 each extend section by section around the suction channel inlet area 80. Both limiting elements 102 and 104 are arranged or formed directly adjacent to the suction channel inlet 76.

[0115] A third embodiment of a suction nozzle 50 is shown by way of example in the Fig. Figures 10 to 12 are shown. Its structure is similar to the exemplary embodiment of Fig. 3 to 6 are similar. The main differences are the design of the limiting device 78 and the arrangement of the nozzle fluid channel 68.

[0116] In the exemplary embodiment of the Fig. From 10 to 12, only a single limiting element 102 in the form of a sealing element 106 is provided. It is formed completely around the rectangular suction channel inlet 76.

[0117] Unlike the embodiment of the Fig. From 3 to 6, the nozzle fluid channel 68 runs centrally, namely concentrically to the nozzle suction channel 66, at least in the area where the nozzle suction channel 66 is bounded by a sleeve-shaped base body 82 with a circular cross-section. This is the case, starting from the proximal end 84, for approximately half of the total length of the base body 82 in a direction parallel to the suction channel inlet direction 100.

[0118] A fourth embodiment of a suction nozzle 50 is shown by way of example in the Fig. Figures 13 to 15 illustrate this. It differs from the embodiment of the Fig. 10 to 12 by providing only a single limiting element 104, namely in the form of a cleaning element 108.

[0119] In this embodiment, the cleaning element 108 is designed in the form of a ring brush 144 with a closed, ring-shaped bristle ring 146. The bristles are inserted into receptacles 120 formed on the nozzle attachment edge 88. In this embodiment, the ring brush 144 comprises Fig. 13 to 15 four straight sections, each running parallel to the other in pairs.

[0120] A fifth embodiment of a suction nozzle 50 is shown schematically in the Fig. Figures 16 to 18 illustrate its construction. It is almost identical in design to the embodiment shown in the Fig. 10 to 12 and 13 to 16. In other words, the exemplary embodiment of the Fig. 16 to 18 a combination of the two embodiments of the Fig. 10 to 15.

[0121] In the exemplary embodiment of the Fig. At 16 to 18, two limiting elements 102 and 104 are provided. Limiting element 104 is designed in the form of a cleaning element 108, specifically in the form of a ring brush 144, which forms a completely circumferential ring of bristles 146. Limiting element 104 borders directly on the suction channel inlet 76.

[0122] The ring brush 144 is surrounded on the outside by the sealing element 106. In this embodiment as well, the limiting element edge 132 projects distally beyond the limiting element edge 130. The distance between the edge planes 134 and 136 defined by the limiting element edges 130 and 132 is in the range of approximately 0.5 mm to approximately 3 mm. The edge planes 134 and 136 run as in the embodiments of Fig. 10 to 15 transversely, namely perpendicularly, to the fluid outlet longitudinal axis 118.

[0123] The two limiting elements 102 and 104 thus form a complete double limit of the suction channel inlet 76 in the circumferential direction, over the entire circumference of the suction channel inlet area 80. A sixth embodiment of a suction nozzle 50 is described in the Fig. Figures 19 to 21 are shown schematically. This embodiment is, in its basic structure, the embodiment of the Fig. 10 to 12 are similar. It differs only in the shape of the intake manifold inlet 76.

[0124] In the exemplary embodiment of the Fig. From 19 to 21, the suction channel inlet 76 has a substantially triangular cross-section. Thus, the base body 82, which extends distally from the proximal end 84 in a sleeve-like, i.e., elongated circular-cylindrical shape, widens towards the suction channel inlet 76 in such a way that a triangular suction channel inlet area 80 is defined.

[0125] Even in the exemplary embodiment of the Fig. 19 to 21 only a single limiting element 102 in the form of a sealing element 106, completely surrounding the suction channel inlet 76, is provided for forming the limiting device 78.

[0126] A seventh embodiment of a suction nozzle 50 is shown schematically in the Fig. Figures 22 to 24 are shown. It also comprises only a single limiting element 104 for forming the limiting device 78.

[0127] Unlike the embodiment of the Fig. However, in figures 19 to 21, the limiting element 104 is designed in the form of a cleaning element 108, specifically in the form of a ring brush 144. It forms a ring of bristles 146 surrounding the suction channel inlet 76 and thus defines the suction channel inlet area 80. In other words, in the exemplary embodiment of the Fig. 22 to 24 instead of the sealing element 106 in the exemplary embodiment of the Fig. A cleaning element 108 is provided at points 19 to 21.

[0128] An eighth embodiment of a suction nozzle 50 is a kind of combination of the embodiments of the Fig. 19 to 24. The limiting device 78 is formed by two limiting devices 102 and 104, each of which completely surrounds the suction channel inlet 76. This creates a double limiting, as in the exemplary embodiment of the Fig. 16 to 18. Here too, the limiting element edge 132 projects distally beyond the limiting element edge 130. Edge planes 134 and 136 are separated from each other by a distance 142. The suction channel inlet area 80 is also triangular in this embodiment.

[0129] A ninth embodiment of a suction nozzle 50, which is in the Fig. Figures 28 to 30, which are shown schematically, are in their structure the exemplary embodiment of the Fig. 19 to 21 are similar. It differs only in the design of the circular intake manifold inlet 76.

[0130] In this embodiment, the base body 52 is hollow-cylindrical from the proximal end 84 to the nozzle attachment edge 88. The embodiment of Fig. 28 to 30 comprises only a single limiting element 102, which completely surrounds the suction channel inlet 76 and is designed in the form of a sealing element 106. As in all other embodiments, the sealing element 106 forms a sealing lip 128 to optimally seal the suction channel inlet area 80 when the suction nozzle 50 is placed on a surface to be cleaned.

[0131] A tenth embodiment of a suction nozzle 50 is shown schematically in the Fig. Figures 31 to 33 illustrate this. It differs from the embodiment of the Fig. 28 and Fig. 30 by the fact that the limiting device 78 is not formed by a sealing element 106, but by a limiting element 104 in the form of a cleaning element 108.

[0132] The cleaning element 108 forms a circular ring brush 144 with a bristle ring 146 directly adjacent to the suction channel inlet 76. This comprises a plurality of bristle bundles 112, which are formed from a plurality of bristles 110.

[0133] In the Fig. Figures 34 to 36 schematically illustrate an eleventh embodiment of a suction nozzle 50. It is analogous to the embodiment of the Fig. 25 to 27 a combination of the embodiments of the Fig. 28 to 33.

[0134] In the exemplary embodiment, the limiting device 78 comprises Fig. Figures 34 to 36 show two limiting elements 102 and 104. Limiting element 104 is designed in the form of a ring brush 144 directly adjacent to the suction channel inlet 76. This ring brush is surrounded on its outer side, facing away from the suction channel inlet area 80, by a limiting element 102 in the form of a sealing element 106. In this way, a double limiting element is formed around the entire circumference of the suction channel inlet area 80 with respect to the fluid outlet longitudinal axis 118.

[0135] In this embodiment as well, the limiting element edge 132 projects distally beyond the limiting element edge 130, so that when the suction nozzle 50 is brought into contact with a surface to be cleaned, the ring brush 144 initially makes contact with the surface to be cleaned. If the suction nozzle 50 is pressed further against the surface to be cleaned, the sealing element 106 then also comes into contact with it and can thus completely seal the suction channel inlet area 80 around its circumference to prevent lateral leakage of cleaning fluid.

[0136] The described embodiments of nozzle attachments 50 can also have different boundaries for the suction channel inlet 76 in alternative embodiments. In particular, outer boundaries can be any conceivable shape, for example oval, circular as in embodiments nine, ten and eleven, polygonal, in particular triangular as in embodiments six, seven and eight, square as in embodiments one to five, or even pentagonal or hexagonal.

[0137] To achieve the desired cleaning result, all described embodiments of nozzle attachments 50 are designed such that, when they have both a cleaning element 108 and a sealing element 106, the cleaning element 108 projects slightly beyond the sealing element 106, specifically the limiting element edge 130, on its distal side and in a distal direction. Thus, when the nozzle attachment 50 is placed on the surface to be cleaned, the cleaning element 108 initially creates a kind of coarse seal around the suction channel inlet area 80. The deformable cleaning element 108 allows the nozzle attachment 50 to be moved even closer to the surface to be cleaned until the sealing element 106 seals the area to be cleaned, i.e., the suction channel inlet area 80, which surrounds the fluid outlet 74 without any spatial separation.

[0138] In particular, embodiments one to eleven of the nozzle attachments 50 are ideally suited for cleaning shoes 148 as well as seats 150 or upholstery 152 thereof. Cleaning fluid, especially 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 106, the cleaning fluid cannot run off the object being cleaned, but is instead drawn into the nozzle suction channel 66 through the suction channel inlet area 80 after application and mechanical processing with the cleaning element 108, if present. Textile materials, in particular, can thus be cleaned easily, gently, and cleanly, i.e., without contaminating the surrounding area.

[0139] The sealing element 106 can optimally seal almost any curved surface, especially if it is sufficiently flexible or elastic.

[0140] All described embodiments of nozzle attachments 50 are made entirely of one or more plastics. The nozzles 90 can alternatively be made of a metallic material. The described nozzle attachments 50 allow for wet cleaning of surfaces. The cleaning fluid loosens dirt, and the cleaning element 108, if present, allows for mechanical treatment of the surface. The resulting dirty solution, i.e., the dirt dissolved in the cleaning fluid, can then be extracted and collected in the dirty solution container 26 of the cleaning device 10.

[0141] In an embodiment of a nozzle attachment 50 (not shown), the cleaning element 108 is designed to be movable. For this purpose, a drive 154 can be used, as schematically shown in the embodiment of the Fig. The drive 154, shown in Figure 37, is located on the handpiece 48. It can be configured to be either activated or deactivated, depending on the cleaning task.

[0142] The drive 154 can, for example, be designed in the form of a vibration, rotary or oscillating drive.

[0143] The fluid output can be manually activated or deactivated as described by means of a valve device 52.

[0144] In the embodiment of the cleaning device 10 according to Fig. Figure 37 schematically shows a control device 156 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 156 can, for example, be effectively connected to an actuating element on the handpiece 48.

[0145] Alternatively, as schematically shown in Fig.Figure 37 shows that a sensor 158, in the form of a touch sensor or a pressure sensor, is arranged or configured on the nozzle attachment 50 and is effectively connected to the control unit 156 for automatically starting fluid dispensing when the sensor 158 is actuated. With such a nozzle attachment 50, a cleaning fluid can thus be automatically dispensed onto the surface to be cleaned when the nozzle attachment 50 is placed on the surface. The sensor 158 can, in particular, be an inductive or capacitive proximity sensor or a mechanical touch element. A control-effective connection to the control unit 156 can be established either via a control line or wirelessly via a radio link.

[0146] By appropriately shaping the 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 performed. 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 shaping the distal end 86 with the circumferential limiting device 78 accordingly.

[0147] The fluid outlets 74 of the described embodiments preferably have a cross-sectional area of ​​approximately 0.1 mm². 2 up to about 2 mm 2 This allows relatively small areas within the area enclosed by the limiting device 78 to be precisely wetted with cleaning fluid. This prevents the application of excessive cleaning fluid. Reference symbol list 10 Cleaning device 12 Spray extraction machine 14 cases 16 Suction unit 18 Funding institution 20 Suction ports 22 Cleaning fluid connection 24 cleaning fluid containers 26 dirty water containers 28 Cleaning hose 30 Hose suction channel 32 first end of hose suction channel 34 second hose suction channel end 36 Hose fluid channel 38 first end of hose fluid channel 40 second hose fluid channel end 42 Suction hose 44 Fluid hose 46 Suction nozzle 48 Handpiece 50 nozzle attachments 52 Valve assembly 54 Handpiece fluid channel 56 Handpiece suction channel 58 Battery 60 proximal end 62 distal end 64 Coupling device 66 Nozzle suction channel 68 Nozzle fluid channel 70 proximal end 72 proximal end 74 Fluid outlet 76 Intake manifold inlet 78 Limiting device 80 Intake channel inlet area 82 Basic bodies 84 proximal end 86 distal end 88 Nozzle attachment edge 90 nozzle 92 End range 94 internal threads 96 external threads 98 proximal nozzle end 100 Suction channel inlet direction 102 Boundary element 104 Boundary element 106 Sealing element 108 Cleaning element 110 bristles 112 bristle bundles 114 Brush section 116 Bristle longitudinal direction 118 Fluid outlet longitudinal axis 120 recordings 122 carriers 124 Rand 126 inner boundary surface 128 Sealing lip 130 Boundary element edge 132 Boundary element edge 134 Edge plane 136 Boundary plane 138 Boundary element length 140 Boundary element length 142 distance 144 Ring brush 146 bristle wreath 148 shoe 150 seats 152 cushions 154 Drive 156 Control unit 158 Sensor QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2022 111 008 A1

[0005]

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 vacuum cleaner, wherein the nozzle attachment (50) comprises a nozzle suction channel (66) and a nozzle fluid channel (68) fluidly separated from it, wherein the nozzle fluid channel (68) comprises a fluid outlet (74) distally for dispensing a cleaning fluid and wherein the nozzle suction channel (66) comprises a suction channel inlet (76) distally for receiving a dirty bath, characterized by , that at least one limiting device (78) projecting distally on the nozzle attachment (50) and forming an outer boundary of a suction channel inlet area (80) defined by the suction channel inlet (76) is arranged or formed, and that the fluid outlet (74) is arranged or formed within the suction channel inlet area (80) without spatial separation from the suction channel inlet area (80). [2] Nozzle attachment according to claim 1, characterized by , that the suction inlet (76) defines a suction inlet direction (100) and that the limiting device (78) completely surrounds the suction inlet area (80) in a circumferential direction with respect to the suction inlet direction (100). [3] Nozzle attachment according to claim 2, characterized by , that the limiting device (78) comprises at least one limiting element (102, 104) which extends in the circumferential direction at least sectionally, in particular completely, around the suction channel inlet area (80) with respect to the suction channel inlet direction (100), wherein in particular the at least one limiting element (102, 104) is designed in the form of a sealing element (106) or in the form of a cleaning element (108). [4] Nozzle attachment according to one of the preceding claims, characterized by, that the limiting device (78) comprises at least one first limiting element (102) and at least one second limiting element (104). [5] Nozzle attachment according to claim 4, characterized by , that the at least one first limiting element (102) and the at least one second limiting element (104) are arranged or designed to overlap at least section by section, in particular completely, in the circumferential direction with respect to the suction channel inlet direction (100) in order to form at least section by section, in particular completely, double limiting of the suction channel inlet (76) in the circumferential direction. [6] Nozzle attachment according to claim 4 or 5, characterized by , that the at least one first limiting element (102) is arranged or formed in the circumferential direction at least sectionally, in particular completely, directly adjacent to the suction channel inlet (76). [7] Nozzle attachment according to one of claims 4 to 6, characterized by, that the at least one second limiting element (104) is arranged or formed in the circumferential direction at least sectionally, in particular completely, directly adjacent to the suction channel inlet (76) with respect to the suction channel inlet direction (100). [8] Nozzle attachment according to one of claims 4 to 7, characterized by , that the at least one first limiting element (102) and the at least one second limiting element (104) are arranged or formed adjacent to each other in the circumferential direction without overlapping, with respect to the suction channel inlet direction (100). [9] Nozzle attachment according to any one of claims 3 to 8, characterized by, that the limiting device (78) comprises only a single limiting element (102, 104) which completely surrounds the suction channel inlet area (80) in the circumferential direction with respect to the suction channel inlet direction (100), wherein in particular the single limiting element (102; 104) is designed in the form of a sealing element (106) or in the form of a cleaning element (108). [10] Nozzle attachment according to any one of claims 4 to 9, characterized by , that the at least one first limiting element (102) is designed in the form of a sealing element (106) and that the at least one second limiting element (78) is designed in the form of a cleaning element (108). [11] Nozzle attachment according to one of the preceding claims, characterized by , that the limiting device (78) concentrically surrounds the fluid outlet. [12] Nozzle attachment according to one of the preceding claims, characterized by, that the intake port inlet (76) defines a cross-sectional area which is oval, circular, polygonal, in particular triangular, square or pentagonal. [13] Nozzle attachment according to any one of claims 3 to 12, characterized by , that the cleaning element (108) a) is designed to be fluid-permeable and / or b) is brush-like in form and comprises a plurality of bristles (110) and / or bristle bundles (112), wherein in particular the bristles (110) define a bristle longitudinal direction (116), the fluid outlet (74) defines a fluid outlet longitudinal axis (118), and wherein the bristle longitudinal direction (118) and the fluid outlet longitudinal axis (118) are aligned parallel or substantially parallel to each other, and / or c) forms at least one straight and / or at least one curved brush section (114) and / or d) is designed in the form of a ring brush (144) with a self-contained ring of bristles (146). [14] Nozzle attachment according to one of the preceding claims, characterized by that the nozzle attachment (50) comprises or forms a support (122) and that the limiting device (78), in particular the at least one limiting element (102, 104), is arranged or formed on the support (122), wherein in particular a) the support (122) is ring-shaped or sleeve-shaped and limits or surrounds the nozzle suction channel (66) and / or b) the fluid outlet (74) protrudes distally beyond a distal boundary edge of the support (122). [15] Nozzle attachment according to one of the preceding claims, characterized by that the fluid outlet (74) comprises a nozzle (90), wherein in particular the nozzle (90) a) is formed in one piece, in particular monolithically, with the nozzle attachment (50). or b) is designed as a separate component and is detachably connectable to a distal end (92) of the nozzle fluid channel (68), in particular screwable or lockable. [16] Nozzle attachment according to one of the preceding claims, characterized by , that the fluid outlet (74) defines a free fluid outlet cross-section, that the suction port inlet (76) defines a free suction port inlet cross-section, and that the ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction port inlet cross-section is in a range of approximately 1:10 3 up to about 1:10 6 lies, in particular in a range of about 1:10 4 up to about 1:10 5 . [17] Suction nozzle according to any one of claims 4 to 16, characterized by, that the at least one first limiting element (104), in particular in the form of a cleaning element (108), projects distally and in a distal direction over the at least one second limiting element (102), in particular in the form of a sealing element (106). [18] Nozzle attachment according to any one of claims 3 to 17, characterized by , that the sealing element (106) a) is designed to be deformable, in particular flexible and / or elastic, and / or b) is formed in the form of a sealing lip (128). [19] Nozzle attachment according to one of claims 14 to 18, characterized by , that the limiting device (78) is sleeve-shaped and extends parallel or substantially parallel to the fluid outlet longitudinal axis (118), in particular concentrically. [20] Nozzle attachment according to one of the preceding claims, characterized by , that the limiting device (78) is designed to be detachably (50) connectable to the nozzle attachment. [21] Nozzle attachment according to any one of claims 3 to 20, characterized by , that the at least one limiting element (102, 104) has a limiting element edge (130, 132) distally. [22] Nozzle attachment according to claim 21, characterized by , that the boundary element edge (130, 132) defines a boundary plane (134, 136), wherein in particular the boundary plane (134, 136) runs transversely, in particular perpendicularly, to the fluid outlet longitudinal axis (118). [23] Nozzle attachment according to one of claims 4 to 22, characterized by , that the at least one first boundary element (104) defines a first boundary element edge (132) distally, that the at least one second boundary element (102) defines a second boundary element edge (130) distally, and that the first boundary element edge (132) projects distally beyond the second boundary element edge (130), or vice versa. [24] Nozzle attachment according to one of claims 14 to 23, characterized by, that the at least one first limiting element (104) has a first limiting element length (140) parallel to the fluid outlet longitudinal axis (118), that the at least one second limiting element (102) has a second limiting element length (102) parallel to the fluid outlet longitudinal axis (118), and that the first limiting element length (140) is greater than the second limiting element length (138), or vice versa. [25] Nozzle attachment according to claim 23 or 24, characterized by , that the first boundary element edge (132) defines a first boundary element edge plane (136) distally, which runs transversely, in particular perpendicularly, to a fluid outlet longitudinal axis (118) of the fluid outlet (74). [26] Nozzle attachment according to one of claims 23 to 25, characterized by, that the second boundary element edge (130) defines a second boundary element edge plane (134) distally, which runs transversely, in particular perpendicularly, to a fluid outlet longitudinal axis (118) of the fluid outlet (74), particularly a) the first boundary element edge plane (136) and the second boundary element edge plane (134) run parallel to each other and / or b) one of the two boundary element edge planes (134, 136) runs distal to the other of the two boundary element edge planes (134, 136). and / or c) the first and second boundary element edge planes (134, 136) have a distance (142) from each other in a direction parallel to the fluid outlet longitudinal axis (118) and that the distance (142) has a value in the range of about 0.5 mm to about 3 mm, in particular a value of about 1 mm. [27] Nozzle attachment according to one of the preceding claims, characterized by, that the limiting device (78), in particular the at least one limiting element (102, 104), is movable, in particular with a drive (154), arranged or formed on the nozzle attachment (50), wherein in particular the nozzle attachment comprises a drive (154) for moving the nozzle attachment (50) or parts thereof, in particular for moving the limiting device (78), and further in particular the at least one limiting element (102, 104), in particular in the form of a vibration, rotation or vibration drive. [28] Nozzle attachment according to one of the preceding claims, characterized bythat the nozzle attachment (50) is angled and comprises a distal and a proximal nozzle attachment section, that the fluid outlet (74) 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 (48), and that the distal and the proximal nozzle attachment sections are angled relative to each other, wherein in particular the proximal nozzle attachment section defines a proximal nozzle attachment section longitudinal axis, and that the distal nozzle attachment section defines a distal nozzle attachment section longitudinal axis, that the proximal nozzle attachment section longitudinal axis and the distal nozzle attachment section longitudinal axis include an angle of inclination, and that the angle of inclination has a value in a range of about 90° to 180°, in particular in a range of about 125° to about 155°. [29] Nozzle attachment according to one of the preceding claims, characterized by , that the nozzle attachment (50), in particular the limiting device (78), is made of a plastic. [30] Suction nozzle (46) for a cleaning device (10), in particular for a spray extraction device (12) or a steam vacuum cleaner, which suction nozzle (46) comprises a handpiece (48) and a nozzle attachment (50), characterized by , that the nozzle attachment (50) is designed in the form of a nozzle attachment (50) according to one of the preceding claims. [31] Suction nozzle according to claim 30, characterized by , that a) the handpiece (48) and the nozzle attachment (50) are designed to be detachably connected to each other and / or b) the nozzle attachment (50) is arranged or designed to be rotatable on the handpiece (48). [32] 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 suction channel (30) with a first and a second suction channel end (32, 34) and a fluid channel (36) with a first and a second fluid channel end (38, 40), wherein the first suction channel end (32) and the first fluid channel end (38) are connected or connectable to a handpiece of a suction nozzle (46), characterized by , that the suction nozzle (46) is designed in the form of a suction nozzle (46) according to claim 30 or 31. [33] Cleaning hose according to claim 32, characterized by , that the second hose suction channel end (34) can be connected or is connected to a suction port (20) of the cleaning device (10) in a fluid-effective manner and that the second hose fluid channel end (40) can be connected or is connected to a fluid port (22) of the cleaning device (10) in a fluid-effective manner. [34] Cleaning device (10), in particular in the form of a spray extraction device (12) or a steam vacuum cleaner, comprising a suction device (16), a conveying device (18), a suction port (20) and a cleaning fluid port (22), wherein the suction device (46) is fluidly connected to the suction port (20) and wherein the conveying device (18) is fluidly connected to the cleaning fluid port (22), wherein the cleaning device (10) further comprises a cleaning hose (28) which is connected or connectable to both the suction port (20) and the cleaning fluid port (22), characterized by , that the cleaning hose (28) is designed in the form of a cleaning hose (28) according to one of claims 32 or 33. [35] Cleaning device according to claim 34, characterized by, that the cleaning device (10) comprises a control device (156) for controlling the conveying device (18) for activating and deactivating a fluid dispensing, wherein in particular the nozzle attachment (50) comprises a sensor (158), in particular a touch sensor and / or a pressure sensor, and that the control device (156) is effectively connected to the sensor (158) for automatically starting a fluid dispensing when the sensor (158) is actuated.

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