CN209808210U

CN209808210U - Floor nozzle for a wet floor cleaning device

Info

Publication number: CN209808210U
Application number: CN201920404946.2U
Authority: CN
Inventors: 卞庄
Original assignee: Suzhou Chenghe Cleaning Equipment Co Ltd
Current assignee: Suzhou EUP Electric Co Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2019-12-20
Anticipated expiration: 2029-03-28

Abstract

The utility model discloses a ground suction nozzle for wet-type ground cleaning equipment, which comprises a shell with a suction opening, a fluid output channel and a small particle liquid catching device which is arranged at the lower part of the shell and is positioned at the rear part of the opening, wherein the small particle liquid catching device comprises a front flexible scraping lip strip and a rear flexible scraping lip strip which are arranged side by side from front to back, the front flexible scraping lip strip and the rear flexible scraping lip strip both extend along the left and right directions, the front flexible scraping lip strip is provided with a front scraping edge positioned at the lowest end, the rear flexible scraping lip strip is provided with a rear scraping edge positioned at the lowest end, a liquid inlet gap is constructed between the front flexible scraping lip strip and the rear flexible scraping lip strip, the liquid inlet gap is communicated with the suction channel, wherein, the front scraping edge and the rear scraping edge are both positioned below the opening, when the ground suction nozzle is used on the ground to be cleaned, one part of the front scraping edge is attached to the ground to be, at least part of the rear scraping edge is in interference fit with the ground to be cleaned, so that the residual amount of water stains on the ground to be cleaned is less.

Description

Floor nozzle for a wet floor cleaning device

Technical Field

The utility model belongs to the technical field of domestic appliance, in particular to a ground suction nozzle for wet-type ground cleaning equipment.

Background

Conventional wet floor cleaning devices, such as floor washers, typically utilize a suction nozzle to clean and soil the floor to be cleaned. In the prior art, such equipment usually needs the user to repeatedly and continuously move the suction nozzle back and forth to suck up dirty liquid on the ground as far as possible, but because the suction is limited and the structure of the suction nozzle is arranged, the small particle liquid remained on the ground is difficult to suck up, so that the ground drying effect is poor after cleaning, and the residual water stain can easily cause secondary pollution.

Chinese patent publication No. CN108652519A discloses a "floor brush machine cleaning and dust collecting machine", which is operated by pumping clean water into a clean water tank through a water pump and spraying the clean water into a rolling brush cavity through a water spray nozzle, so as to wet a rolling brush and facilitate the rolling brush to scrub the ground. For the convenience of clearing away the foul solution on ground, on this washing dust catcher's scrubbing brush, set up preceding, two sets of wind channels in back and the preceding, the back dust blocking piece that correspond and accomplish the soil pick-up work, specifically do: when the floor brush moves forwards, the front dust-blocking piece is opened, large-particle dust and wastewater enter the forward air inlet and the rolling brush cavity from the front dust-blocking piece, and the rear dust-blocking piece vertically scrapes the ground and blocks the dust and wastewater which are not cleaned in time in the floor brush; when the scrubbing brush moves backwards, the rear dust-blocking piece is opened, large-particle dust and wastewater enter the rear air inlet and the rolling brush cavity from the rear air inlet, and the front dust-blocking piece vertically scrapes the ground and blocks the dust and wastewater inside the scrubbing brush, which are not cleaned in time, inside the scrubbing brush. In a word, this washs dust absorption scrubbing brush and washs dust catcher through the setting of two air intakes, double air duct and wind channel spacer to cooperation front and back fender dirt piece, make the even balance of flow, the suction of front and back air intake. The front air inlet, the rear air inlet and the suction capacity are not distinguished, the floor brush can only ensure that the same cleaning and dirt absorbing functions can be realized in the forward and backward moving process of the floor brush, and small-particle liquid remained on the ground cannot be thoroughly removed.

One "surface cleaning apparatus" disclosed in publication No. CN206434268U defines a suction nozzle in its brush roll chamber in fluid communication with the foot conduit and is configured to draw liquid and debris from the brush roll and surface to be cleaned. The suction nozzle defines a dirty air inlet through a working air path or a recovery path of the vacuum cleaner. The suction nozzle is further fluidly connected to the canister assembly by a foot conduit and a flexible conduit hose; the rear scraping blade is arranged at the rear part of the brush roller, but after the brush roller cleans and sucks dirt on the ground to be cleaned, a small part of sewage still flows to the rear scraping blade, and then the scraping blade only plays a role in scraping the ground to be cleaned, and the dirt sucking capability is omitted, so that water stain can still be remained on the ground to be cleaned, and the use of a user on the ground is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a clean effectual ground suction nozzle that is used for wet-type ground cleaning equipment.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a floor nozzle for a wet floor cleaning device, comprising:

a housing defining a suction channel therein, said suction channel having an opening in an underside of said housing, said suction channel being capable of drawing dirt and liquid particles from a floor surface to be cleaned into said opening by means of a suction force;

the fluid output channel is used for outputting cleaning fluid outwards; the method is characterized in that:

the ground suction nozzle further comprises a small particle liquid capturing device, the small particle liquid capturing device is arranged at the lower portion of the shell and located behind the opening, the small particle liquid capturing device comprises a front flexible scraping lip strip and a rear flexible scraping lip strip which are arranged side by side in the front and the rear, the front flexible scraping lip strip and the rear flexible scraping lip strip extend in the left-right direction, the front flexible scraping lip strip is provided with a front scraping edge located at the lowest end, the rear flexible scraping lip strip is provided with a rear scraping edge located at the lowest end, a liquid inlet gap is formed between the front flexible scraping lip strip and the rear flexible scraping lip strip, and the liquid inlet gap is communicated with the suction channel;

the front scraping edge and the rear scraping edge are both positioned below the plane where the opening is positioned, when the floor suction nozzle is used on the floor to be cleaned, one part of the front scraping edge and/or the rear scraping edge is in interference fit with the floor to be cleaned, at least one narrow channel is formed between the other part of the front scraping edge and/or the rear scraping edge and the floor to be cleaned, and small-particle liquid can be sucked into the liquid inlet gap through the narrow channel.

In the above technical solution, preferably, when the floor nozzle is used on a floor to be cleaned, a part of the front scraping edge is in interference fit with the floor to be cleaned, and at least one narrow channel is formed between another part of the front scraping edge and the floor to be cleaned, and the rear scraping edge is in interference fit with the floor to be cleaned.

In the above technical solution, preferably, the front scraping edge has a plurality of gaps penetrating from front to back, and the gaps are communicated with the liquid inlet gap; when the ground suction nozzle is used on the ground to be cleaned, the front scraping edge of the part between every two adjacent notches is in interference fit with the ground to be cleaned, and the corresponding narrow channel is formed between each notch and the ground to be cleaned.

In the above technical solution, preferably, the height of the notch is 0.5-1 mm.

In the above technical solution, preferably, a plurality of protrusions are arranged on the front surface of the front scraping edge at intervals along the left-right direction; when the ground suction nozzle is used on the ground to be cleaned, the partial front scraping edge between every two adjacent protrusions is in interference fit with the ground to be cleaned, and corresponding narrow channels are formed between every two adjacent protrusions and the ground to be cleaned.

In the above technical solution, preferably, when the floor suction nozzle is used on a floor to be cleaned, an interference between the partial front scraping edge and the floor to be cleaned is 0.5-1.5mm, and an interference between the partial front scraping edge and the floor to be cleaned is 1-2 mm.

In the above technical solution, preferably, the position of the rear scraping edge is lower than the position of the front scraping edge.

In the above technical solution, preferably, when the floor nozzle is used on a floor to be cleaned, a gap with a height of 1-3mm is formed between the opening and the floor to be cleaned.

In the technical scheme, preferably, the front flexible scraping lip strip and/or the rear flexible scraping lip strip are/is provided with a plurality of spacing ribs which are used for spacing the front flexible scraping lip strip and the rear flexible scraping lip strip from front to back.

In the above technical solution, preferably, the width of the liquid inlet gap is 0.5-5 mm.

In the above technical solution, preferably, the floor nozzle further includes a roller brush rotatably disposed in the housing, the roller brush at least partially extending to a lower side of the opening, the roller brush being configured to contact a floor to be cleaned and pick up dirt and liquid particles from the surface to be cleaned during rotation of the roller brush and deliver the dirt and liquid particles to the opening.

In the above technical solution, preferably, when the floor nozzle is used on a floor to be cleaned, a part of the rear scraping edge is in interference fit with the floor to be cleaned, and at least one narrow channel is formed between another part of the rear scraping edge and the floor to be cleaned, and the front scraping edge is in interference fit with the floor to be cleaned.

The utility model discloses a set up tiny particle liquid trapping apparatus at scrubbing brush open-ended rear, utilize this device can clear away remaining tiny particle liquid or dirt that are not inhaled by the opening part, it has realized removing a suction nozzle, can treat clean ground and carry out the secondary and clean and the soil pick-up for the subaerial water stain of treating after the cleanness remains a little, and the ground after the cleanness is more dry, and user experience is better.

Drawings

Fig. 1 is a perspective view of embodiment 1 of the present invention;

FIG. 2 is an exploded schematic view of the floor nozzle of FIG. 1;

FIG. 3 is a left side schematic cross-sectional view of the floor nozzle of FIG. 1;

FIG. 4 is a top cross-sectional schematic view of the floor nozzle of FIG. 1;

FIG. 5 is a front cross-sectional schematic view of the floor nozzle of FIG. 1;

figure 6 is a schematic perspective view of a suction nozzle of embodiment 1 of the present invention;

FIG. 7 is a cross-sectional schematic view of the suction nozzle shown in FIG. 6;

FIG. 8 is a schematic cross-sectional view of the small particle liquid trap shown in FIG. 2;

FIG. 9 is an exploded schematic view of the front and rear flexible scraping lip strips of the small particle liquid trap shown in FIG. 2;

FIG. 10 is a schematic cross-sectional view of the small particle liquid trap shown in FIG. 3;

FIG. 11 is a schematic view of the front and rear flexible scraping lip strips of the small particle liquid catch assembly shown in FIG. 3 as the floor nozzle is moved forward over the floor to be cleaned;

FIG. 12 is an enlarged partial schematic view at A of FIG. 11;

FIG. 13 is a schematic view of the front and rear flexible scraping lip strips of the small particle liquid catch assembly shown in FIG. 3 as the floor nozzle is moved rearwardly over the floor to be cleaned;

FIG. 14 is an enlarged partial schematic view at B of FIG. 13;

FIG. 15 is a schematic left sectional view of the floor nozzle of embodiment 2 of the present invention;

fig. 16 is a schematic perspective view of a small particle liquid trap device according to embodiment 2 of the present invention;

FIG. 17 is a schematic cross-sectional view of the liquid catch device shown in FIG. 16 (showing the inner wall surface of the front wiper lip;

FIG. 18 is an exploded schematic view of the front and rear flexible scraping lip strips of the small particle liquid trap shown in FIG. 16;

FIG. 19 is a schematic cross-sectional view of the small particle liquid trap shown in FIG. 15;

FIG. 20 is a schematic view of the front and rear flexible scraping lip strips of the small particle liquid catch assembly shown in FIG. 15 as the floor nozzle is moved forward over the floor to be cleaned;

FIG. 21 is an enlarged partial schematic view at C of FIG. 20;

FIG. 22 is a schematic view of the front and rear flexible scraping lip strips of the small particle liquid catch assembly shown in FIG. 15 as the floor nozzle is moved rearwardly over the floor to be cleaned;

FIG. 23 is an enlarged partial schematic view at E of FIG. 22;

wherein: 100. a ground suction nozzle; 11. a housing; 12. rolling and brushing; 13. a small particle liquid capture device; 14. a drive motor; 15. a suction channel; 16. an opening; 17. a base; 18. a front flexible lip scraping strip; 19. a rear flexible lip scraping strip; 20. front scraping; 21. scraping edges; 22. a liquid inlet gap; 23. a narrow passageway; 24. a notch; 25. separating ribs; 26. a protrusion; 27. a recess; 28. a first through hole; 29. a suction nozzle; 30. a tube connecting portion; 31. a second through hole; 32. a suction pipe body; 33. a roller brush cavity; 34. a front support wheel; 35. and a rear support wheel.

Detailed Description

To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings.

Example 1

The floor nozzle 100 of the present embodiment is primarily intended for use in a wet floor cleaning apparatus such as a floor cleaning machine, floor scrubbing machine or the like, and embodiment 1 will be described in detail with reference to figures 1-12. In this embodiment, the upper, lower, left, right, front and rear are respectively corresponding to the position relationships of the floor suction nozzle shown in fig. 1 and 2, and the axial direction is the direction in which the rolling brush shown in fig. 2 extends left and right.

As shown in fig. 1, 2 and 4, the floor nozzle 100 includes a housing 11, a fluid outlet channel (not shown), a roller brush 12, a small particle fluid capturing device 13 and a driving device 14.

The housing 11 is provided at the front side thereof with a roll brush chamber 33, and the roll brush 12 is installed in the roll brush chamber 33 and rotated by the driving motor 14. A suction channel 15 is defined between the front side and the rear side of the housing 11, the suction channel 15 having an opening 16 at the lower side of the housing 11, the lower end portion of the drum brush 12 protruding outside the opening 16, the drum brush 12 being adapted to contact the floor to be cleaned and to pick up dirt and liquid particles from the floor to be cleaned during rotation of the drum brush 12 and to convey them to the opening 16. The suction channel 15 is capable of sucking dirt and liquid particles on the floor surface to be cleaned from the opening 16 into it by means of a suction force. In particular, as shown in connection with fig. 3, 4 and 6, the suction channel 15 comprises a suction nozzle 29 on the front side and a suction body 32 on the rear side. The front portion of the suction nozzle 29 extends in the left-right direction and forms a part of the side wall of the brush chamber 33, the rear portion of the suction nozzle 29 forms a pipe connection portion 30 communicating with a suction pipe body 32, the suction pipe body 32 being adapted to communicate with a suction unit on a wet floor cleaning device, so that a suction action is performed by the suction unit generating a suction force of an air flow entering the suction passage 15 from the opening 16. In order to keep the opening 16 having a high suction force on the floor surface to be cleaned, it is preferred that there is a gap of 1-3mm in height between the opening 16 and the floor surface to be cleaned when the floor nozzle is used on the floor surface to be cleaned.

The liquid output channel is in fluid communication with a cleaning liquid supply system on the wet floor cleaning device, the cleaning liquid supply system generally comprises a liquid supply tank for storing the cleaning liquid, a pump for inputting the cleaning liquid in the liquid supply tank into the liquid output channel, and a liquid spray nozzle which is communicated with the liquid output channel and is used for outputting the cleaning liquid to the floor to be cleaned or the rolling brush 12, wherein the structures of the liquid output channel and the liquid spray nozzle are that the arrangement on the floor suction nozzle aims at cleaning the floor to be cleaned, and the arrangement on the specific arrangement position can be realized in various ways, for example, the liquid output channel is arranged outside the shell, the liquid spray nozzle is arranged on the upper part of the shell and positioned on the front side of the opening, and the liquid spray nozzle outputs the cleaning liquid towards the floor to be cleaned; can also be with liquid output channel setting in the inside of casing, set up hydrojet on the internal face in casing round brush chamber, the hydrojet exports the cleaning solution towards on the round brush to moist round brush treats clean ground and scrubs, and above structure is prior art, aims at understanding the utility model discloses, do not give unnecessary details.

As shown in fig. 3, 5, 8 and 9, the small particle liquid trap 13 is disposed at the lower portion of the housing 11 and behind the opening 16, and the small particle liquid trap 13 includes a base 17, a front flexible scraping lip strip 18 and a rear flexible scraping lip strip 19 mounted on the base 17. Preceding flexible scrape lip strip 18 and the flexible back of scraping lip strip 19 around set up side by side and all extend along left right direction, preceding flexible scrape lip strip 18 have one be located the preceding limit 20 of scraping of bottommost, the flexible back of scraping lip strip 19 has one be located the back of bottommost and scrapes limit 21, wherein, preceding limit 20 of scraping and back scrape limit 21 and all be in opening 16 place planar below, preceding flexible scrape lip strip 18 and the flexible back scrape construct a feed liquor gap 22 between the lip strip 19, feed liquor gap 22 is linked together with suction channel 15. In order to satisfy the liquid suction capability of the liquid inlet slit 22 under the low power suction condition, the width D of the liquid inlet slit 22 in this example is set to be between 0.5 and 5 mm.

Specifically, as shown in fig. 2, a concave portion 27 is formed in the middle of the base 17, first through holes 28 are formed in opposite side walls of the concave portion 27 of the base 17, as shown in fig. 6 and 7, the outer contour surface of the pipe connecting portion 30 of the suction nozzle 29 is fitted into the concave portion 27 of the base 17, second through holes 31 are formed in opposite side walls of the pipe connecting portion 30 to be fitted into the first through holes 28, as shown in fig. 5, when the small particle liquid trap device 13 is mounted to the lower portion of the housing 11, the base 17 is inserted into the pipe connecting portion 30 through the recess 27, the two first through holes 28 and the two second through holes 31 are communicated with each other in a one-to-one correspondence, so that the liquid inlet gap 22 between the front flexible scraping lip strip 18 and the rear flexible scraping lip strip 19 is communicated with the suction channel 15 in a fluid mode, and liquid particles on the ground to be cleaned can enter the suction channel 15 along the liquid inlet gap 22.

As shown in fig. 3 and 9 to 12, when the floor suction nozzle is used on the floor to be cleaned, a part of the front scraping edge 20 is in interference fit with the floor to be cleaned, another part of the front scraping edge forms at least one narrow channel 23 with the floor to be cleaned, at least a part of the rear scraping edge 21 is in interference fit with the floor to be cleaned, and the small-particle liquid can be sucked into the liquid inlet gap 22 through the narrow channel 23. The term "interference fit" as used herein means that when the floor nozzle is used on the floor to be cleaned, the front scraping edge 20 or the rear scraping edge 21 will be deformed and then closely fit to the floor, that is, when the floor nozzle is not in contact with the floor, the front scraping edge 20 or the rear scraping edge 21 is in a natural state and is located at a position lower than a "base" where the bottom of the nozzle fits to the floor, and the "base" in this case is defined by lower edges of the front and rear sets of support wheels 34, 35.

Specifically, as shown in fig. 11 and 12, the outer wall surface of the front scraping edge 20 and the outer wall surface of the rear scraping edge 21 are both provided with protrusions 26, when the floor nozzle is used on the floor to be cleaned and moves forward, all the protrusions 26 on the front scraping edge 20 are in interference fit with the floor to be cleaned, a narrow channel 23 is formed between a part between two adjacent protrusions 26 on the front scraping edge 20 and the floor to be cleaned, and then substantially all the rear scraping edge 21 is in interference fit with the floor to be cleaned, so that small liquid particles on the floor to be cleaned can only be sucked into the liquid inlet gap 22 from the narrow channel 23 on one side of the front scraping edge 20 and finally be sucked away by the suction channel 15. Referring to fig. 13 and 14, when the floor nozzle is used on the floor to be cleaned and moves backward, all the protrusions 26 on the rear scraping edge 21 are in interference fit with the floor to be cleaned, a narrow channel 23 is formed between the part between two adjacent protrusions 26 on the rear scraping edge 21 and the floor to be cleaned, and substantially all the front scraping edge 20 is in interference fit with the floor to be cleaned, so that liquid particles on the floor to be cleaned can be sucked into the liquid inlet gap 22 only from the narrow channel 23 on one side of the rear scraping edge 21 and finally is sucked away by the suction channel 15.

In order to suck the liquid particles on the floor to be cleaned away as much as possible and keep the floor to be cleaned dry, the interference between the front scraping edge 20 and the floor to be cleaned is 0.5-1.5mm, and the interference between the rear scraping edge 21 and the floor to be cleaned is 1-2 mm. The rear scraping edge 21 is preferably positioned lower than the front scraping edge 20. The interference magnitude is as follows: when the ground suction nozzle is not in contact with the ground, the front scraping edge 20 or the rear scraping edge 21 is lower than the height of a base plane defined by the front and rear groups of supporting wheels 34 and 35; when the ground suction nozzle is contacted with the ground, the front scraping edge 20 or the rear scraping edge 21 is tightly attached to the ground and elastically deforms, and the elastic deformation amount deforms within the range of interference.

In order to avoid too close contact between the front flexible wiping lip strip 18 and the rear flexible wiping lip strip 19, which may result in too narrow inlet gap 22 or even in the contact of the two strips to form an air-tight seal, the front flexible wiping lip strip 18 and/or the rear flexible wiping lip strip 19 are provided with a plurality of spacing ribs 25 for spacing the front flexible wiping lip strip 18 and the rear flexible wiping lip strip 19 back and forth. The size of the spacing rib 25 is required to meet the requirement that the width D of the liquid inlet gap 22 is between 0.5 and 5mm, namely, the width of the front flexible scraping lip strip 18 and the width of the rear flexible scraping lip strip 19 in the front-rear direction are always limited to be between 0.5 and 5mm through the spacing rib 25.

Example 2

In order to simplify the description and avoid redundant description, this embodiment only describes the differences from embodiment 1, and as shown in fig. 15 and fig. 16, embodiment 2 differs from embodiment 1 in that the front scraping edge 20 has a plurality of front-back through notches 24, the notches 24 communicate with the liquid inlet gap 22, a plurality of spacers 25 are provided only on the inner wall surface of the front scraping edge 20, the plurality of spacers 25 are arranged at equal intervals along the length direction of the front scraping edge 20, and protrusions 26 are provided only on the outer wall surface of the rear scraping edge 21. Preferably, two gaps 24 are provided between two adjacent spacer ribs 25. As shown in fig. 15, 18 and 19, when the floor nozzle is used on the floor to be cleaned, the portion between two adjacent notches 24 on the front scraping edge 20 is in interference fit with the floor to be cleaned, and a narrow channel 23 is formed between the notches 24 and the floor to be cleaned. Preferably, the height of the gap 24 is 0.5-1 mm.

Specifically, as shown in fig. 20 and 21, when the floor suction nozzle is used on the floor to be cleaned and moves forward, a narrow channel 23 is formed between a gap 24 between two adjacent ribs 25 on the front scraping edge 20 and the floor to be cleaned, a portion of the front scraping edge 20 except the gap 24 is in interference fit with the floor to be cleaned, and all the ribs 25 on the inner wall surface of the front scraping edge 20 are in abutting contact with the inner wall surface of the rear scraping edge 21, so that a distance for the air flow to pass through is always reserved between the front scraping edge 20 and the rear scraping edge 21, and substantially all the rear scraping edge 21 is in interference fit with the floor to be cleaned, so that small liquid particles on the floor to be cleaned can be sucked into the liquid inlet gap 22 only from the narrow channel 23 on one side of the front scraping edge 20 and are finally sucked away by the suction channel 15. As shown in fig. 22 and 23, when the floor suction nozzle is used on the floor to be cleaned and moves backward, the front scraping edge 21 is in interference fit with the floor to be cleaned, a narrow channel 23 is formed between a part between two adjacent protrusions 26 on the rear scraping edge 21 and the floor to be cleaned, and the inner wall surface of the part of the rear scraping edge 21 except the protrusions 26 is fitted with and seals all the gaps 24 of the front scraping edge 20, so that small liquid particles on the floor to be cleaned can be sucked into the liquid inlet gap 22 only from the narrow channel 23 on one side of the rear scraping edge 21 and are finally sucked away by the suction channel 15.

In the ground suction nozzle in the scheme, the opening of the suction channel on the front side of the ground suction nozzle is mainly used for sucking and removing large-particle liquid dirt on the ground to be cleaned, and the small-particle liquid which is not sucked up by the opening of the suction channel can be supplemented and sucked by the small-particle liquid catching device, so that the ground to be cleaned is kept dry. In both the above embodiments 1 and 2, the rolling brush is disposed at the opening of the suction channel, and the large-particle liquid on the ground to be cleaned is picked up and sent to the opening by the rolling brush, in other embodiments, the rolling brush may not be disposed, and the flat suction nozzle may be disposed to connect with the suction channel instead of the rolling brush to suck the large-particle liquid on the ground to be cleaned, and then the small-particle liquid catching device on the rear side is used to suck the dirt on the ground to be cleaned for the second time, so as to remove the small-particle liquid on the ground to be cleaned, thereby keeping the ground to be cleaned dry. Further, in addition to the structures of the front and rear flexible lip strips described in the above embodiments 1 and 2, in other embodiments, a notch or a protrusion structure may be provided only on the front flexible lip strip to form a narrow passage with the floor to be cleaned.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A floor nozzle for a wet floor cleaning device, comprising:

-a housing (11), said housing (11) defining a suction channel (15), said suction channel (15) having an opening (16) in the underside of said housing (11), said suction channel (15) being capable of drawing dirt and liquid particles from a floor surface to be cleaned into said opening (16) by means of a suction force;

the floor nozzle also comprises a small particle liquid catching device (13), the small particle liquid catching device (13) is arranged at the lower part of the shell (11) and is positioned at the rear of the opening (16), the small particle liquid catching device (13) comprises a front flexible lip scraping strip (18) and a rear flexible lip scraping strip (19) which are arranged side by side in front and back, the front flexible scraping lip strip (18) and the rear flexible scraping lip strip (19) both extend along the left-right direction, the front flexible scraping lip strip (18) is provided with a front scraping edge (20) positioned at the lowest end, the rear flexible scraping lip strip (19) is provided with a rear scraping edge (21) positioned at the lowest end, a liquid inlet gap (22) is formed between the front flexible scraping lip strip (18) and the rear flexible scraping lip strip (19), the liquid inlet gap (22) is communicated with the suction channel (15);

wherein, the front scraping edge (20) and the rear scraping edge (21) are both arranged below the plane of the opening (16), and when the floor suction nozzle is used on the floor to be cleaned, one part of the front scraping edge (20) and/or the rear scraping edge (21) is in interference fit with the floor to be cleaned, at least one narrow channel (23) is formed between the other part of the front scraping edge (20) and/or the rear scraping edge (21) and the floor to be cleaned, and small-particle liquid can be sucked into the liquid inlet gap (22) through the narrow channel (23).

2. A floor nozzle for a wet floor cleaning device according to claim 1, characterized in that: when the floor suction nozzle is used on the floor to be cleaned, one part of the front scraping edge (20) is in interference fit with the floor to be cleaned, at least one narrow channel (23) is formed between the other part of the front scraping edge and the floor to be cleaned, and the rear scraping edge (21) is in interference fit with the floor to be cleaned.

3. A floor nozzle for a wet floor cleaning device according to claim 2, characterized in that: the front scraping edge (20) is provided with a plurality of gaps (24) which are communicated with each other in a front-back direction, and the gaps (24) are communicated with the liquid inlet gap (22); when the floor suction nozzle is used on the floor to be cleaned, the partial front scraping edge (20) between the two adjacent notches (24) is in interference fit with the floor to be cleaned, and the corresponding narrow channel (23) is formed between the notch (24) and the floor to be cleaned.

4. A floor nozzle for a wet floor cleaning device according to claim 3, characterized in that: the height of the notch (24) is 0.5-1 mm.

5. A floor nozzle for a wet floor cleaning device according to claim 2, characterized in that: a plurality of bulges (26) distributed at intervals along the left-right direction are arranged on the front surface of the front scraping edge (20); when the floor suction nozzle is used on the floor to be cleaned, the bulges (26) are in interference fit with the floor to be cleaned, and the corresponding narrow channel (23) is formed between the partial front scraping edge (20) between every two adjacent bulges (26) and the floor to be cleaned.

6. A floor nozzle for a wet floor cleaning device according to claim 1 or 2, characterized in that: when the floor suction nozzle is used on the floor to be cleaned, the interference between the partial front scraping edge (20) and the floor to be cleaned is 0.5-1.5mm, and the interference between the rear scraping edge (21) and the floor to be cleaned is 1-2 mm.

7. A floor nozzle for a wet floor cleaning device according to claim 6, characterized in that: the position of the rear scraping edge (21) is lower than that of the front scraping edge (20).

8. A floor nozzle for a wet floor cleaning device according to claim 1, characterized in that: when the floor nozzle is used on the floor to be cleaned, a clearance with the height of 1-3mm is arranged between the opening (16) and the floor to be cleaned.

9. A floor nozzle for a wet floor cleaning device according to claim 1, characterized in that: the inner surfaces of the front flexible scraping lip strip (18) and/or the rear flexible scraping lip strip (19) are provided with a plurality of spacing ribs (25) which are used for spacing the front flexible scraping lip strip (18) and the rear flexible scraping lip strip (19) from front to back.

10. A floor nozzle for a wet floor cleaning device according to claim 1 or 9, characterized in that: the width of the liquid inlet gap (22) is 0.5-5 mm.

11. A floor nozzle for a wet floor cleaning device according to claim 1, characterized in that: the floor nozzle further comprises a roller brush (12) rotatably arranged in the housing (11), the roller brush (12) extending at least partially to the underside of the opening (16), the roller brush (12) being adapted to contact the floor to be cleaned and to pick up dirt and liquid particles from the surface to be cleaned and to transport them to the opening (16) during rotation of the roller brush (12).

12. A floor nozzle for a wet floor cleaning device according to claim 1, characterized in that: when the ground suction nozzle is used on the ground to be cleaned, one part of the rear scraping edge (21) is in interference fit with the ground to be cleaned, at least one narrow channel is formed between the other part of the rear scraping edge and the ground to be cleaned, and the front scraping edge (20) is in interference fit with the ground to be cleaned.