WO2017108088A1

WO2017108088A1 - Suction nozzle for a hard surface cleaning device and hard surface cleaning device having a suction nozzle of this type

Info

Publication number: WO2017108088A1
Application number: PCT/EP2015/080887
Authority: WO
Inventors: Eugenio Venturini; Paolo Reggiani
Original assignee: Alfred Kärcher Gmbh & Co. Kg
Priority date: 2015-12-21
Filing date: 2015-12-21
Publication date: 2017-06-29
Also published as: CN108430290A; EP3393320A1; CN108430290B; EP3393320B1; US20180296044A1; PL3393320T3

Abstract

A suction nozzle (32) is provided for a portable hard surface cleaning device (10) for removing or suctioning fluid off a hard surface, in particular from a window pane, comprising a suction nozzle housing (77) with a first and a second housing half-shell (76, 78), which form a suction channel (80) between them, which suction channel extends from a suction opening (82) to a suction channel end section (30) to which a negative pressure source can be connected to generate a suction flow, an interchangeable wiper lip (92) is arranged on the suction opening (82) and both housing half-shells (76, 78) have at least one respective holding element (110, 114, 120, 122) adjacent to the suction opening (82), and a holding section (98) of the interchangeable wiper lip (92) is arranged between the holding elements (110, 114, 120, 122) of both housing half-shells. In order to further develop the suction nozzle (32) such that it can be reliably held on the suction opening (82), the holding elements (110, 113, 120, 122) form a respective engagement with the holding section (98). A portable hard surface cleaning device (10) having a suction nozzle (32) of this type is also provided.

Description

SUCTION HOUSE FOR A HARD FLAT CLEANER AND HARDWARE CLEANER WITH SUCH A

suction nozzle

The invention relates to a suction nozzle for a portable Hartflächenreinigungs- device for removing and absorbing liquid from a hard surface, in particular a window pane, comprising a suction nozzle housing with a first and a second housing half shell, which form a suction channel between them, wherein the suction channel of a Suction opening, on which a replaceable Abziehlippe is held, to a Saugkanalend- extending portion to which a vacuum source is connected to form a suction flow, and wherein the two housing half shells of the suction opening adjacent each have at least one holding element and a holding portion of the interchangeable Abziehlippe between the Retaining elements of the two housing half-shells is arranged to hold the replaceable Abziehlippe to the suction port.

Moreover, the invention relates to a portable hard surface cleaning device with such a suction nozzle.

From WO 2015/007328 AI a portable hard surface cleaning device is known, by means of which a hard surface, in particular a window pane, can be cleaned. The portable hard surface cleaning device has a suction nozzle with a Abziehlippe that can be moved along the hard surface like a manual Fensterabziehers so that liquid can be removed from the hard surface. The liquid collects at a suction opening of the suction nozzle and can be sucked up from the suction opening via a suction channel and transferred into a dirty liquid tank. The portable hard surface cleaning device has for this purpose a suction unit, which is in flow communication with the suction channel. By means of the suction unit In the region of the suction opening, a suction flow can be generated under the action of which a mixture of liquid and air is sucked in via the suction opening.

From US Pat. No. 5,184,372 a suction nozzle is known having two housing half shells which form between them a suction channel which extends from the suction opening to a suction channel end section, to which a vacuum source can be connected. An interchangeable Abziehlippe is held at the suction opening. On one of the two housing half shells, a holding element in the form of a groove is formed, which receives a one-sided projection of the removable Abziehlippe, and on the other housing half shell in the region of the suction channel a plurality of support elements are arranged at a distance from each other, which support the replaceable Abziehlippe.

Object of the present invention is to develop a suction nozzle of the type mentioned in such a way that the interchangeable Abziehlippe is held more reliable at the suction port.

This object is achieved in a suction nozzle of the generic type according to the invention that the holding elements of the housing half shells each form an engagement with the holding portion of the interchangeable Abziehlippe.

In the suction nozzle according to the invention, the holding portion of the interchangeable Abziehlippe is engaged both with the at least one retaining element of the first housing half shell and with the at least one retaining element of the second housing half shell. As a result, the replaceable Abziehlippe of the two housing halves, which form the suction channel, reliably held at the suction port. The two housing half-shells form between them the suction channel and for holding the Abziehlippe no additional component is required. When mounting the suction nozzle, the two housing halves can be connected together with the interposition of the removable Abziehlippe, in particular screwed, wherein the holding elements of both housing half-shells with the holding portion of the interchangeable Abziehlippe each form an engagement.

It is advantageous if the holding section of the interchangeable Abziehlippe both in a first position of use of interchangeable Abziehlippe and in a rotated 180 ° about a central axis of Abziehlippe second use position of the Abziehlippe between the at least one holding element of the first housing half shell and the at least one retaining element of the second Housing half-shell is positionable, wherein the central axis of the replaceable Abziehlippe are aligned parallel to the longitudinal axis of the suction channel. This gives the possibility to rotate the Abziehlippe and thereby increase the life of the Abziehlippe. It can first assume a first position of use in which it is moved along the hard surface to be cleaned. The holding portion is positioned in the first use position of the Abziehlippe between the holding elements of the two housing halves and is engaged with the holding elements of the two housing halves in engagement. In the first use position, the replaceable Abziehlippe can contact the hard surface with a first contact area. This area may be subject to wear when cleaning the hard surface, so that after reaching a maximum degree of wear, the achievable cleaning effect is impaired. If this degree of wear is achieved, the replaceable Abziehlippe can be rotated by 180 ° about their aligned parallel to the longitudinal axis of the suction channel central axis to a second

Use position to take. Also in the second position of use, the holding portion assumes a position between the holding elements of the two housing half-shells and is engaged with the holding elements of the two housing halves in engagement. Also in the second position of use the Abziehlippe can be moved along the hard surface to be cleaned, wherein it contacts the hard surface with a previously unused second contact area. Both in the first position of use and in the second position of use, it is ensured by means of the retaining elements arranged on the two housing half-shells that the haul-off lip on the suction Opening is held reliably and by means of the Abziehlippe in both

In use, a very good cleaning effect can be achieved.

It is advantageous if the interchangeable Abziehlippe is designed symmetrically to its center plane, wherein the median plane is aligned parallel to the longitudinal axis of the suction channel.

To change the position of use, it is advantageous if the interchangeable Abziehlippe pulled transversely to the longitudinal axis of the suction channel from the Saugdüsengehäuse, then rotated 180 ° about its central axis and then again can be pulled transversely to the longitudinal axis of the suction channel in the Saugdüsengehäuse.

Preferably, the change of the use position of the removable Abziehlippe done without tools. In such an embodiment, the user can take the Abziehlippe at its protruding from the suction nozzle housing front area by hand and laterally, transversely to the longitudinal axis of the suction channel, out of the Saugdüsengehäuse and after turning the Abziehlippe pull back into the Saugdüsengehäuse. The holding elements of the two housing half shells can in this case form a guide for the holding section of the replaceable Abziehlippe.

The two housing half-shells are preferably releasably connected to each other. It may be provided, for example, that the two housing halves are screwed together or releasably latched together.

The holding elements of the housing half-shells form both in the first

Use position as well as in the second position of use of the interchangeable Abziehlippe an engagement, preferably a positive connection with the holding portion of the interchangeable Abziehlippe.

The holding section of the exchangeable peeling lip preferably has two holes formed symmetrically with respect to the median plane of the peeling lip. ments in which engages in both the first position of use and in the second position of use of the Abziehlippe complementarily configured projections of the retaining elements of the first and second housing half shell.

In an advantageous embodiment of the invention, the holding portion of the replaceable Abziehlippe designed as symmetrical to the median plane of the replaceable Abziehlippe extension formed and the holding elements of the two housing halves have recesses into which engages the extension.

It can be provided, for example, that the extension of the holding portion is designed in the form of a straight bead and the holding elements of the two housing half shells each having a recess into which the bead dips.

The bead may, for example, have a circular cross-sectional area and the holding portions of the two housing half-shells may each take up about one half of the cross section of the bead with their depression.

It is favorable if at least one retaining element of the first housing half-shell is arranged in the region of the suction channel and forms a flow-guiding element. The at least one retaining element, which is arranged in the region of the suction channel, can support and fix the replaceable Abziehlippe in the region of the suction channel and can simultaneously serve to guide the suction flow.

The at least one retaining element arranged in the region of the suction channel preferably forms a flow guide rib. The Strömungsleitrippe can specify a flow direction of the suction flow in the region of the suction opening, so that a mixture of liquid and suction air in a predetermined direction can flow into the suction channel. Flow losses can be kept low, and this in turn has the advantage that the energy consumption of the vacuum source can be kept low.

In the region of the suction channel, a plurality of flow guide ribs, each spaced from one another, are preferably arranged.

It is particularly favorable when the flow guide ribs are arranged in a fan shape. With respect to the centrally arranged longitudinal axis of the suction channel, the flow guide ribs can have an increasing inclination to the longitudinal axis with increasing distance from the longitudinal axis.

The Strömungsleitrippen are arranged in an advantageous embodiment of the invention relative to the longitudinal axis of the flow channel at the same height.

In order to keep the flow resistance of the Strömungsleitrippen low, it is advantageous if the Strömungsleitrippen tapered against the flow direction of the suction flow.

It is advantageous if the flow guide ribs each have a recess on their upper edge facing away from the first housing half shell, into which recess the retaining section of the replaceable wiper lip is inserted.

In relation to the flow direction of the suction flow, the depressions are preferably arranged on a rear end region of the upper edge, and in a region located upstream of the depressions, the upper edges of the flow guidance ribs preferably form a planar support surface for the replaceable separating lip. The support surface is inclined in an advantageous embodiment in the direction of a bottom wall of the suction channel.

It is favorable if the flow guide ribs are wedge-shaped in cross-section. In a longitudinal section, they can flow in the direction of Suction flow have an increasing height to the bottom wall of the suction channel.

Preferably, the interchangeable Abziehlippe located on the Strömungsleitrippen relative to the flow direction of the suction flow over at least half of its extension.

In addition to the at least one holding element, which is arranged in the suction channel, the first housing half shell in a preferred embodiment, at least one further holding element, which is arranged outside of the suction channel.

In particular, it can be provided that the first housing half-shell has two further holding elements, which are arranged symmetrically to each other outside the suction channel with respect to its longitudinal axis. The two holding elements arranged outside the suction channel can each extend up to an edge of the housing half-shell starting from a side wall of the suction channel.

In an advantageous embodiment of the invention, the second housing half-shell has a holding element which extends along the entire holding section of the replaceable draw-off lip and thus forms an engagement with the holding section along the entire holding section.

In a particularly preferred embodiment of the invention, the suction nozzle in addition to a replaceable Abziehlippe a non-replaceable Abziehlippe which is integrally formed on the first housing half shell. The non-replaceable Abziehlippe can form a support for the replaceable Abziehlippe. When cleaning a hard surface, the liquid located on the hard surface is subtracted from the replaceable Abziehlippe so that the interchangeable Abziehlippe subject in particular in a rough hard surface wear. The non-replaceable Abziehlippe on the other hand is subject to at most a minor wear, which practically has no effect on the achievable cleaning effect.

It is advantageous if the non-replaceable Abziehlippe forms an injection molded part together with the first housing half shell with a hard component and an elastomer component. The hard component can in this case form the wall of the first housing half shell and the elastomer component can form the non-replaceable Abziehlippe, which is flexible, namely flexurally elastic designed due to the elastomeric material used in a corresponding manner as the interchangeable Abziehlippe.

As a hard component, for example, a polypropylene material or an ABS material (acrylonitrile-butadiene-styrene) can be used, in particular a talc-reinforced polypropylene material.

As the elastomer component, for example, a thermoplastic elastomer material can be used.

The elastomer component forms the non-replaceable Abziehlippe. In an advantageous embodiment of the invention, the at least one holding part, which is arranged in the region of the suction channel, at least partially surrounded in the circumferential direction of the elastomer component.

Preferably, one of the two housing half-shells in the region of the Saugkanalendabschnitts on a locking element which forms an elastically deformable wall portion of the suction channel and is encapsulated by an elastomer component. If the Saugkanalendabschnitt connected to the vacuum source, the locking element of the housing half shell can form a latching connection together with a complementary configured latching element of the vacuum source. This ensures that the suction nozzle does not inadvertently come off the vacuum source. The latching element of the housing half-shell is arranged in the region of the suction channel end section and forms an elastically deformable wall section of the suction channel. In order to avoid that suction air can flow out of the suction channel in the region of the locking element, the locking element is encapsulated by an elastomer component. The elastomer component thus forms a sealing element and ensures that the locking element can be deformed elastically for producing a latching connection.

The latching element advantageously forms a latching hook, which has a spring tongue and a latching projection projecting outwardly from the spring tongue. The spring leg forms an elastically deformable wall portion of the suction channel and is encapsulated by the elastomer component.

The spring tongue is preferably designed in the manner of a leaf spring, which is integrally connected at one end to the wall of the housing half shell and carries at its other end the outwardly projecting locking projection. The spring tongue is molded with the exception of its one-piece connected to the wall of the housing half shell end of the elastomer component.

It may, for example, be provided that a housing half shell of the suction nozzle forms an injection molded part with a hard component and an elastomer component, wherein an elastically deformable wall section of the suction channel is configured by the hard component in the form of a spring tongue which, with the exception of one end region, surrounds a through slot penetrating the hard component is, wherein the passage slot of the hard component is covered by the integrally formed on the hard component elastomer component. The spring tongue is integrally connected only at one end with the hard component, but otherwise separated from the hard component by means of the passage slot. This gives the spring tongue elastic deformability. In order to avoid that liquid and suction air can flow out of the suction channel via the passage slot, the spring tongue is encapsulated by the elastomer component, which seals the passage slot. The elastomeric component ensures that the spring tongue flexes relative to the hard component of the housing half shell can, wherein the elastomer component is subjected to a bending stress, but without thereby the tightness of the suction channel is impaired.

As mentioned above, the invention relates not only to a suction nozzle of the type described above but also a hard surface cleaning device for removing and sucking a liquid from a hard surface with such a suction nozzle. The portable hard surface cleaning device has a suction unit for forming a suction flow, so that a mixture of liquid and suction air can be sucked from the hard surface to be cleaned. In addition, the portable hard surface cleaning device according to the invention has a dirty liquid tank in which the absorbed liquid can be deposited. For separating the liquid from the absorbed liquid-air mixture, the portable hard surface cleaning device according to the invention has a separation device.

The separation device is preferably arranged in a separation chamber, which is positioned in the flow path between the suction nozzle and the suction unit, and the separated liquid can be transferred from the separation chamber into the dirty liquid tank. The separation chamber and the dirty liquid tank are thus conveniently structurally separated.

Preferably, the portable hard surface cleaning device has a Saugkanalauf- receiving shaft, which is pluggable connectable to the Saugkanalendabschnitt the suction nozzle and having a locking receptacle for receiving a locking projection of the suction nozzle. As already mentioned, it is favorable if the suction nozzle has a latching element which is arranged in the region of the suction duct end section and is preferably designed as an elastically deformable wall section of the suction duct. The suction nozzle is conveniently pluggable connectable to a Saugkanalaufnahmeschacht the hard surface cleaning device, and within the Saugkanalaufnahmeschachts is a Rastauf- arranged arranged, which cooperates with the locking element of the suction nozzle to form a latching connection.

The hard surface cleaning device according to the invention preferably forms a portable window cleaning device.

The following description of an advantageous embodiment of the invention is used in conjunction with the drawings for further explanation. Show it :

FIG. 1 shows a perspective view of a portable hard surface cleaning device;

FIG. 2 shows a sectional view of the hard surface cleaning device from FIG. 1;

FIG. 3 is a perspective view of a suction nozzle of the hard surface cleaning device;

Figure 4: a perspective view of a first and a second

Housing half shell of the suction nozzle of Figure 3;

Figure 5: a perspective view of the first housing half shell

diagonally from above;

Figure 6: a perspective view of the first housing half shell

diagonally from below;

FIG. 7 shows a longitudinal sectional view of the suction nozzle from FIG. 3.

In the drawing, an advantageous embodiment of a portable hard surface cleaning device according to the invention is shown schematically, which is generally occupied by the reference numeral 10. With the aid of the portable hard surface cleaning device 10, liquid from a hard surface, in particular dere from a window, pulled off and sucked up. Mirror surfaces or tiled walls can also be cleaned by means of the portable hard surface cleaning device 10. The hard surface cleaning device 10 can be moved by the user in the manner of a manual Fensterabziehers on the hard surface. The hard surface cleaning device 10 forms a portable window cleaning device.

The hard surface cleaning device 10 comprises a base part 12, in which a suction unit 14 is arranged. The suction unit 14 comprises an electric motor 16 which rotatably drives a suction turbine 18. Air can be sucked in from the suction turbine 18 via a turbine inlet line 20 of straight design in the illustrated embodiment. The turbine inlet duct 20 dips into a separation chamber 22. In the separation chamber 22, a separation element in the form of an impact wall is arranged at a distance from the turbine inlet line 20, which covers an inlet opening 26 of the turbine inlet line 20 and is curved substantially convexly in the direction away from the turbine inlet line 20.

On the side of the separation chamber 22 facing away from the turbine inlet line 20, the base part 12 forms a suction channel receiving shaft 28, which receives a suction channel end section 30 of an advantageous embodiment of a suction nozzle 32 according to the invention. The suction nozzle 32 is shown schematically in the drawing and will be explained in more detail below.

The suction turbine 18 is separated from the separation chamber 22 by means of a first dividing wall 34, the turbine inlet line 20 passing through the first dividing wall 34. In the region of the first partition wall 34, the turbine inlet line 20 is surrounded by a sealing ring 36, with the aid of which it is ensured that liquid from the separation chamber 22 can not unintentionally reach the suction turbine 18 along the outside of the turbine inlet line 20.

At a distance from the first partition wall 34 and aligned parallel thereto, the base part 12 has a second partition wall 38. The suction turbine 18 is between see the first partition wall 34 and the second partition wall 38 is arranged, and the electric motor 16 is disposed on the suction turbine 18 side facing away from the second partition 38 in a drive chamber 40 of the base member 12. A motor shaft 42 of the electric motor 16 passes through the second partition wall 38 and is rotatably connected to the suction turbine 18. By means of the motor shaft 42, the suction turbine 18 can be rotated.

In addition to the electric motor 16, a rechargeable battery 44 and a control, switching and charging electronics 46 are positioned in the drive chamber 40. The control, switching and charging electronics 46 cooperates with an actuator 48 which is formed in the illustrated embodiment as a pressure switch for switching on and off of the electric motor 16. In addition controls the control, switching and charging electronics 46, the speed of the electric motor 16 and the Charging the battery 44. The control, switching and charging electronics 46 and the battery 44 are arranged on a common printed circuit board 49.

The drive chamber 40 is arranged in a handle 50 of the base part 12. The handle 50 can be grasped by the user with one hand.

The handle 50 extends to a bottom wall 52 of the base part 12, with which the portable hard surface cleaning device 10 can be placed on a footprint.

In addition to the base part 12 and the suction nozzle 32, the portable hard surface cleaning device 10 has a dirty liquid tank 54 which on

Base part 12 is held releasably without tools and into which a filling device 56 dips. Via the filling device 56, liquid can pass from the separation chamber 22 into the dirty liquid tank 54. The filling device 56 has a filler pipe 58 and a vent pipe 60, which are integrally connected to one another and immersed in the dirty liquid tank 54. The dirty liquid tank 54 has an upper tank section 62 facing the separation chamber 22, which can be inserted into an upper recess 64 of the base part 12 via an upper opening 63, and a rear tank section 66, which via a lower opening 67 into a lower recess 68 of the Base part 12 can be used. The upper recess 64 is disposed laterally adjacent to the suction turbine 18 and communicates with the suction turbine 18 in fluid communication so that suction air from the suction turbine 18 via the upper recess 64 and the upper opening 63 can be discharged to the environment.

A hopper 70 opens into the upper recess 64 and is integrally connected to the first partition wall 34. Via the filling funnel 70, liquid can pass from the separating chamber 22 into a trough-shaped depression 72 of the filling device 56, to which the filling tube 58 adjoins. The vent tube 60 extends parallel to the filler pipe 58, wherein it protrudes with its the dirty liquid tank 54 facing away from the upper end via the filler pipe 58 and dips into the hopper 70.

The lower recess 68 is arranged directly above the bottom wall 58, wherein the bottom wall 52 has resiliently deformable bottom wall sections in the region of the lower recess 68 and thereby exerts on the dirty fluid tank 54 a resilient holding force in the direction of a contact wall 74 arranged at a distance from the bottom wall 52 the rear tank section 66 abuts with its upper side. By means of complementarily designed latching elements, the rearward tank section 66 can be latched to the lower recess 68.

The dirty liquid tank 54, together with the handle 50, defines a gripping opening 75 of the portable hard surface cleaning device 10 which the user can grasp with his fingers while holding the portable hard surface cleaning device 10. The suction nozzle 32 is shown separately in Figures 3 to 7. It has a suction nozzle housing 77 with a first housing half shell 76 and a second housing half shell 78, which are detachably connected to each other. In the illustrated embodiment, the two housing half shells 76, 78 are screwed together.

The two housing half shells 76, 78 define a suction channel 80 between them. With its rear end region facing the deposition chamber 20, the suction channel 80 forms the already mentioned suction channel end section 30, which can be inserted into the suction channel receiving shaft 28. The suction channel 80 extends between the two housing half-shells 76, 78 from a suction opening 82 to the Saugkanalendabschnitt 30th

The first housing half-shell 78 forms a bottom wall 84 of the suction channel 80 and first, arcuately curved side walls 86, 88 of the suction channel 80. In a corresponding manner, the second housing half shell 76 forms a top wall 90 of the suction channel 80 and second arcuately curved side walls of the suction channel 80, the on the first side walls 86, 88 can be placed flow-tight.

For removing liquid from a hard surface to be cleaned, the suction nozzle 32 in the region of the suction opening 82 has a replaceable Abziehlippe 92 and a non-replaceable Abziehlippe 94. The non-replaceable Abziehlippe 94 is integrally formed on the first housing half shell 78 and forms together with the first housing half shell 78 an injection molded part with two components, namely with a hard component, which forms the first housing half shell 78, and with an elastomer component, the non-replaceable Abziehlippe 74th formed.

The suction channel 80 has a centrally arranged longitudinal axis 102 and the interchangeable Abziehlippe 92 is symmetrical to its parallel to the longitudinal axis 102 aligned center plane 96 configured and has a holding portion 98 which is of a substantially circular cross-section Bead 100 is formed. The bead 100 extends transversely to the longitudinal axis 102 of the suction channel 80 along the entire length of the interchangeable Abziehlippe 92 and forms the rear end region thereof. The front end region of the interchangeable Abziehlippe 92 is formed by a first Abziehkante 104 and a second Abziehkante 106 which extend along an end facing away from the bead 100 front side 108 of the interchangeable Abziehlippe 92.

The first housing half-shell 78 has, for fixing the replaceable Abziehlippe 92 on a plurality of holding elements, wherein a plurality of first holding elements are arranged in the region of the suction channel and each form a Strömungsleitrippe 114. The Strömungsleitrippen 114 are fan-shaped, so that they have an increasing inclination to the longitudinal axis 102 with increasing distance from the longitudinal axis 102 of the suction channel 80. Relative to the longitudinal axis 102, all Strömungsleitrippen 114 are arranged at the same height. They are from the bottom wall 84 vertically upwards and have on their bottom wall 84 facing away from the upper edge 116 each have a recess 118 into which the bead 100 dips positive fit. In front of the recesses, the flow guide ribs 114 each have on their upper edge a flat support surface 119 directed obliquely to the bottom wall 84 for the exchangeable stripping lip 92. With the help of Strömungsleitrippen 114, the interchangeable Abziehlippe 92 is supported in the region of the suction channel 80. The Strömungsleitrippen 114 are aerodynamically optimized in shape, wherein they taper in their non-replaceable Abziehlippe 94 facing the front end portion In addition to their support function, the Strömungsleitrippen 114 allow to carry a suction flow with very low flow losses, so that a mixture of liquid and Suction air can flow with only small flow losses between the Strömungsleitrippen 114.

In addition to the flow guide ribs 114, the first housing half-shell 78 has two further retaining elements for fixing the interchangeable Abziehlippe 92. These further holding elements are in the form of a holding channel 120 and a retaining groove 122 configured, which extend outside of the suction channel in each case from a first side wall 86 and 88 of the suction channel 80 to an outer wall 124, 126 of the first housing half-shell 78.

The second housing half-shell 78 has a retaining element in the form of a retaining channel 110 for fixing the interchangeable Abziehlippe 92 at the suction opening 82. The retaining channel 110 receives an upper edge region 112 of the bead 100. Likewise, the pair of retainers 120, 122 disposed outwardly of the suction channel 80 and the flow guide ribs 114 disposed within the suction channel 80 each receive a lower edge portion 128 of the bead 100 such that the interchangeable peel lip 92 is interposed between the two two housing halves 76, 78 is fixed.

To clean a hard surface, the portable hard surface cleaning device 10 can be moved along with the removable Abziehlippe 92 on a hard surface to be cleaned. The replaceable Abziehlippe 92 may in this case occupy a first first use position in which the first Abziehkante 104 of the non-replaceable Abziehlippe 94 faces, as shown for example in Figure 7. When cleaning the hard surface, the first peeling edge 104 slides in this first position of use along the hard surface to be cleaned. In particular, in cases where the hard surface has roughnesses, the first peeling edge 104 may be subject to wear. Upon reaching a maximum degree of wear, the cleaning effect achievable by means of the first peeling edge 104 can be impaired. The user then has the option of laterally extracting the replaceable wiper lip 92 via one of the outer walls 124, 126 from the suction nozzle housing 77 to rotate 180 degrees relative to its central axis 130 and then retract it into the suction nozzle housing 77 via one of the outer walls 124, 126 , The interchangeable Abziehlippe 92 then assumes a second position of use, in which the second Abziehkante 106 of the non-replaceable Abziehlippe 94 faces and at the to be cleaned Hard surface can slide along. The life of the removable Abziehlippe 92 can be considerably extended.

As already mentioned, the Saugkanalendabschnitt 30 can be inserted into the Saugkanal- receiving shaft 28 of the base member 12. This becomes clear in particular from FIG. In order to avoid that the suction nozzle 32 unintentionally releases from the base part 12, the suction nozzle 32 can be latched to the base part 12. In the suction channel receiving shaft 28, a latching recess 134 is arranged for this purpose, and the lower housing half-shell 78 forms a latching element in the form of a latching hook 136 in the region of the suction channel end section 30. The latching hook 136 has a spring tongue 138, which forms an elastically deformable wall section 139 of the suction channel 80 and is integrally connected to the first housing half shell 76. At its free end, the spring tongue 138 carries on the outside of the first housing half shell 76 an outwardly projecting latching projection 140. This is particularly clear from Figure 6. The spring tongue 138, with the exception of the locking projection 140 facing away from the end, where it is integrally connected to the first housing half shell 76, surrounded by a U-shaped passage slot 142. This allows for insertion of the Saugkanalendabschnitts 30 in the Saugkanalaufnahmeschacht 28 a resilient movement of the spring tongue 138 until the locking projection 140 occupies a position equal to the catch recess 134 and engages in the latching recess 134. So that no suction air and no liquid can emerge from the suction channel 80 via the passage slot 142, the spring tongue 138 on the inside of the suction channel 80 is encapsulated by the same elastomer component, which also forms the non-replaceable withdrawal lip 94. The elastomer component forms a U-shaped film hinge in the region of the passage slot 142, which makes it possible to move the spring tongue 138 together with the latching projection 140 relative to the hard component forming the first housing half shell 76, but it is ensured that neither through the passage slot 142 Suction still fluid can escape from the suction channel 80. The elastomer component extends from the non-replaceable Abziehlippe 94 along the first side walls 86, 88 of the suction channel 80 to the latching hook 136. This is particularly clear from Figure 5.

After the suction nozzle 32 is connected by inserting the Saugkanalendabschnitts 30 in the Saugkanalaufnahmeschacht 38 with the base part 12, the portable hard surface cleaner 10 can be moved along the hard surface like a manual Fensterabziehers for cleaning a hard surface, in particular a window or a glass door, by means of the replaceable Abziehlippe 92 and this supporting non-replaceable Abziehlippe 94 located on the hard surface liquid of the suction port 82 can be supplied. Via the suction channel 80, the liquid can be sucked together with air from the suction opening 82 and the separation chamber 20 are supplied. For this purpose, the deposition chamber 20 can be subjected to negative pressure by the suction unit 14 via the turbine inlet line 20. The mixture of liquid and air flows through the suction channel 80 and, within the separation chamber 22, first strikes a baffle plate 144 held on the suction channel end section 30, at which part of the entrained liquid separates. Subsequently, the liquid-air mixture impinges on the baffle 24, at which the remaining entrained liquid separates, whereas the sucked air flows around the baffle plate 144 and the baffle 24 and passes through the turbine inlet line 20 to the suction turbine 18. From the suction turbine 18, the sucked air is discharged outside via an annular air discharge space 146 which circumferentially surrounds the upper tank portion 62 within the upper recess 64.

The baffle 144 forms a first separator for separating liquid and the baffle 24 forms a second separator for separating liquid from the aspirated liquid-air mixture. The deposited in the deposition chamber 22 liquid can pass through the hopper 70 and the filler pipe 58 into the dirty liquid tank 54. If necessary, the dirty liquid tank 54 can be emptied. The user can do this the dirty liquid tank 54 together with the Remove it held filling device 56 from the base member 12 by pulling the rear tank portion 44 from the lower recess 68 and then removes the upper tank portion 62 of the upper recess 64. Subsequently, the user can release the filling device 56 from the dirty liquid tank 54 and empty the dirty liquid tank 54. The user can then insert the filling device 56 back into the dirty liquid tank 54 and insert it with the upper tank section 62 into the upper recess 64 and with the rear tank section 66 into the lower recess and engage with the base part 12.

If, after prolonged use of the portable hard surface cleaning device 10, the first or second peeling edge 104, 106 sliding along the hard surface to be cleaned are worn, the user has the possibility of exchangeable peel lip 92, as explained in detail above, about its central axis 130 to twist, so that then the previously unused Abziehkante 104 or 106 can be used.

The portable hard surface cleaning device 10 according to the invention is characterized by a long service life and can be moved by the user in the usual manner in the manner of a manual Fensterabziehers on the hard surface. The portable hard surface cleaning device 10 is characterized by low manufacturing costs.

Claims

PATENT APPLICATIONS

A suction nozzle for a portable hard surface cleaning device (10) for drawing and sucking liquid from a hard surface, in particular a window pane, comprising a suction nozzle housing (77) having a first and a second housing half shell (76, 78) between them a suction channel ( 80), wherein the suction channel (80) extends from a suction opening (82), on which a replaceable Abziehlippe (92) is held, to a Saugkanalendabschnitt (30) to which a vacuum source is connectable to form a suction flow, and wherein the two housing half-shells (76, 78) of the suction opening (82) adjacent at least one holding element (110, 114, 120, 122) and a holding portion (98) of the interchangeable Abziehlippe (92) between the holding elements (110, 114, 120 , 122) of the two housing half-shells (76, 78) is arranged, characterized in that the holding elements (110, 114, 120, 122) of the housing half-shells (76, 78) with the holding portion (98) of the removable Abziehlippe (92) each form an engagement.

2. Suction nozzle according to claim 1, characterized in that the holding portion (98) of the replaceable Abziehlippe (92) both in a first position of use of the interchangeable Abziehlippe (92) and in a 180 ° about its central axis (130) rotated second

Use position of the removable Abziehlippe (92) between the at least one holding element (114, 120, 122) of the first housing half shell (76) and the at least one holding element (110) of the second housing half shell is positionable, wherein the central axis (130) parallel to a longitudinal axis ( 102) of the suction channel (80) is aligned.

3. Suction nozzle according to claim 1 or 2, characterized in that the replaceable Abziehlippe (92) symmetrical to its center plane (96) is configured, wherein the median plane (96) is aligned parallel to the longitudinal axis (102) of the suction channel (80).

4. Suction nozzle according to claim 1, 2 or 3, characterized in that the holding portion (98) of the replaceable Abziehlippe (92) is designed as an extension and the holding elements (110, 114, 120, 122) each having a recess.

5. Suction nozzle according to claim 4, characterized in that the extension is designed as a straight bead (100) and the holding elements (110, 114, 120, 122) each having a recess into which the bead (120) is immersed.

6. Suction nozzle according to one of the preceding claims, characterized in that at least one holding element of the first housing half-shell (76) is arranged in the region of the suction channel (80) and forms a flow-guiding element.

7. Suction nozzle according to claim 6, characterized in that the at least one, in the region of the suction channel (80) arranged holding element forms a flow guide rib (114).

8. Suction nozzle according to claim 7, characterized in that in the region of the suction channel (80) a plurality of spaced Strömungsleitrippen (114) are arranged.

9. Suction nozzle according to claim 8, characterized in that the flow guide ribs (114) are arranged in a fan shape.

10. Suction nozzle according to claim 8 or 9, characterized in that the Strömungsleitrippen (114) relative to the longitudinal axis (102) of the suction channel (80) are arranged at the same height.

11. Suction nozzle according to claim 8, 9 or 10, characterized in that the flow guide ribs (114) taper counter to the flow direction of the suction flow.

12. Suction nozzle according to one of claims 8 to 11, characterized in that the Strömungsleitrippen (114) on its first housing half shell (76) facing away from the upper edge (116) each having a recess (118) into which the holding portion (98) of the interchangeable Dipping lip (92) dips.

13. Suction nozzle according to claim 12, characterized in that the depressions (118) on the upper edges (116) of the Strömungsleitrippen (114) in a relation to the flow direction of the suction flow rear end portion of the Strömungsleitrippen (114) are arranged, and that the upper edges ( 116) in a recess (118) upstream portion form a flat support surface (119) for the replaceable Abziehlippe (92).

14. Suction nozzle according to one of claims 8 to 13, characterized in that the Strömungsleitrippen (114) are wedge-shaped in cross section.

15. Suction nozzle according to one of claims 8 to 14, characterized in that the replaceable Abziehlippe (92) based on the flow direction of the suction flow over at least half of its extension on the Strömungsleitrippen (114) is seated.

16. Suction nozzle according to one of claims 6 to 15, characterized in that the first housing half-shell (76) has at least one further holding element (120, 122), which is arranged outside of the suction channel (80).

17. Suction nozzle according to claim 16, characterized in that the first housing half shell (76) has at least two further holding elements (120, 122), which are arranged outside of the suction channel (80) with respect to the longitudinal axis (102) symmetrical to each other.

18. Suction nozzle according to one of the preceding claims, characterized in that the suction nozzle (32) has a non-replaceable Abziehlippe (94) which is integrally formed on the first housing half shell (76).

19. Suction nozzle according to claim 18, characterized in that the non-replaceable Abziehlippe (94) together with the first housing half shell (76) forms an injection molded part with a hard component and an elastomer component.

20. Suction nozzle according to claim 19 in conjunction with claim 6, characterized

in that the elastomer component at least partially surrounds at least one holding element arranged in the region of the suction channel (80) in the circumferential direction.

21. Suction nozzle according to one of the preceding claims, characterized in that one of the two housing half-shells (76, 78) in the region of the Saugkanalendabschnitts (30) has a latching element (136) forming an elastically deformable wall portion (139) of the suction channel (80) and is encapsulated by an elastomer component.

22. Suction nozzle according to claim 21, characterized in that the latching element forms a latching hook (136) having a resiliently deformable wall portion (139) of the suction channel (80) forming the spring tongue (138) and one of the spring tongue (138) projecting outwardly Locking projection (140), wherein the spring tongue (138) is encapsulated by the elastomer component.

23. A portable hard surface cleaning device for removing and absorbing a liquid from a hard surface, in particular a window pane, with a suction unit (14), a dirty liquid tank (54) and a separation device (24, 144) for separating liquid from a sucked liquid-air mixture, and a suction nozzle (32) according to any one of the preceding claims.

24. Portable hard surface cleaning device according to claim 23, characterized

in that the portable hard surface cleaning device (10) has a suction channel receiving shaft (28) which is pluggable connectable to the Saugkanalend- section (30) and a locking receptacle (134) for receiving a latching projection (140) of the suction nozzle (32).