CN110236454B

CN110236454B - Cleaning head for a floor cleaning machine

Info

Publication number: CN110236454B
Application number: CN201910504311.4A
Authority: CN
Inventors: 卞庄
Original assignee: Suzhou EUP Electric Co Ltd
Current assignee: Suzhou EUP Electric Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2021-04-23
Anticipated expiration: 2039-06-12
Also published as: CN110236454A

Abstract

The invention discloses a cleaning head for a floor cleaning machine, which comprises a cleaning head body, a bottom plate, a water supply tank and a water distributor, wherein at least one suction port is arranged at the bottom of the cleaning head body, the water supply tank is arranged on the cleaning head body and positioned at the upper side of the bottom plate, a closed first cavity is arranged in the water supply tank, a water outlet is arranged at the lower part of the water supply tank, the water distributor is arranged on the bottom plate, the water distributor comprises a shell, a water inlet arranged at the top of the shell, a second cavity formed in the shell, at least one water outlet arranged at the lower bottom of the shell and a vent hole arranged at the upper part of the shell and communicated with the outside, the volume of the second cavity is smaller than that of the first cavity, the water outlet, the water inlet, the second cavity and the water outlet are sequentially communicated, a water sealing port communicated with the second cavity is arranged at the lower, the mop can supply water more smoothly and can avoid the overflow of the water in the water tank from the vent hole.

Description

Cleaning head for a floor cleaning machine

Technical Field

The invention belongs to the technical field of cleaning equipment, and particularly relates to a cleaning head for a floor cleaning machine.

Background

In daily life, a vacuum cleaner is generally used for sucking particles such as dust on a floor to be cleaned, and is particularly suitable for cleaning rough floors, such as indoor carpets, wooden floors, and the like, while for cleaning smooth floors, such as floor tiles, ceramic tiles, and the like, a cleaning mop is generally used for scrubbing the smooth floor by a wet mop to remove stains on the surface of the smooth floor. The cleaning mode inevitably needs a user to replace the cleaning tool for many times to realize the cleaning operation of the surface to be cleaned, and the operation is complicated.

The Chinese patent application with the publication number of CN108852185A discloses a water tank and an automatic cleaning device, wherein the water tank comprises a tank body and a gear adjusting piece, and a liquid outlet, a first adjusting port and a second adjusting port are arranged on the tank body at intervals; the gear adjusting key selectively seals the first adjusting port and forms a bubble cavity at the second adjusting port in the state of liquid storage of the box body; the gear adjusting key selectively seals the second adjusting port and forms continuous bubbles at the first adjusting port in a state that the tank body stores liquid. The water tank comprises a tank bottom and a tank cover which are connected, a first water cavity and a second water cavity which are communicated with each other are formed between the tank cover and the tank bottom, the depth of the first water cavity is larger than that of the second water cavity, the liquid outlet, the first adjusting port and the second adjusting port are arranged on the tank bottom at intervals, the first adjusting port is directly communicated with the first water cavity, and the second adjusting port is directly communicated with the second water cavity.

Therefore, in the structure, the first water cavity and the second water cavity are both closed cavities, the first water cavity is communicated with the second water cavity, the first adjusting port is communicated with the outside and the first water cavity, the second adjusting port is communicated with the outside and the second water cavity, when the first adjusting port is selectively closed and the second adjusting port is opened, air enters the second water cavity in a bubble mode under the action of atmospheric pressure, and because the water level in the second water cavity is low, the pressure of bubbles overcoming fluid is small, so that more bubbles easily enter the second water cavity, and the water yield is large; when the first regulation mouth is closed and the second regulation mouth is closed, then the air gets into first water cavity with the form of bubble under the atmospheric pressure effect, because the water level in first water cavity is higher than the water level in the second water cavity, the pressure that the fluidic is overcome to the bubble is great relatively, consequently, the bubble is difficult and less gets into first water cavity, and the water yield is less, but in the above-mentioned structure, because two regulation mouths all set up in the water tank bottom, then the condition that the water in the water tank leaked from the regulation mouth of opening can appear unavoidably, cause to wait to clean the untidy ground. If a second adjusting port is formed in the top wall of the second water cavity and a first adjusting port is formed in the top wall of the first water cavity, when the first adjusting port is closed and the second adjusting port is opened, water in the second water cavity can emerge from the second adjusting port to wet the outside of the box body and even enter the sweeping robot to cause the damage of a motor due to the fact that the two water cavities are communicated and the water level in the first water cavity is higher than that in the second water cavity; in addition, if the water tank is provided with the vent hole, and the vent hole is in an opened state, the external air only enters the water tank from the vent hole, and the opened adjusting port and the opened liquid outlet are both water outlets, so that the water in the water tank leaks from the opened adjusting port.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a cleaning head for a floor cleaning machine, which supplies water to a mop more smoothly, wets the mop more efficiently, and can prevent water from leaking from a water tank.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

a cleaning head for a floor cleaning machine comprising:

the bottom of the cleaning head body is provided with at least one suction opening;

a bottom plate for mounting a cleaning mop;

the water supply tank is arranged on the cleaning head body and positioned on the upper side of the bottom plate, a closed first cavity is arranged in the water supply tank, and a water outlet is formed in the lower part of the water supply tank;

the water distributor is arranged on the bottom plate and comprises a shell, a water inlet formed in the top of the shell, a second chamber formed in the shell, at least one water outlet formed in the lower bottom of the shell and a vent hole arranged on the upper portion of the shell and communicated with the outside, the volume of the second chamber is smaller than that of the first chamber, the water outlet, the water inlet, the second chamber and the water outlet are sequentially communicated, a water sealing port communicated with the second chamber is arranged on the lower portion of the water supply tank, and the water sealing port is located on the lower portion of the water outlet and extends into the second chamber; when the water sealing port is exposed from the liquid surface of the second chamber, air entering from the vent hole can enter the first chamber from the second chamber through the water sealing port; when the water sealing port is positioned below the liquid level of the second chamber, air stops flowing from the second chamber to the first chamber.

In the above technical solution, preferably, the vent hole is disposed away from the water sealing port.

In the above technical solution, preferably, the water dispenser is detachably mounted on the bottom plate.

In the above technical solution, preferably, at least a portion of the housing of the water dispenser is integrally formed with the bottom plate.

In the above aspect, the bottom plate is preferably integrally formed with the water supply tank, and is detachably attached to the cleaning head body.

In the above technical solution, preferably, the bottom plate is fixedly installed at the bottom of the cleaning head body, and the water supply tank is detachably installed at the top of the cleaning head body.

In the above technical solution, preferably, a part of the top of the housing protrudes upward to form a protruding portion, and the vent hole is provided in the protruding portion.

In the above technical scheme, preferably, the water supply tank is internally provided with a water outlet valve, the water outlet valve is installed at the water outlet and used for opening and closing the water outlet, and the outside of the water supply tank is provided with an action part in transmission connection with the water outlet valve.

In the above technical solution, preferably, the water supply tank is provided with a downwardly extending tubular portion at the water outlet, the tubular portion extends downwardly into the second chamber, and the water sealing port is opened on the tubular portion.

In the above technical solution, preferably, the water distributor includes a partition plate disposed inside the second chamber, the partition plate divides the second chamber into an upper portion and a lower portion, and the partition plate is provided with a plurality of small holes communicating the upper portion and the lower portion of the second chamber.

In the above technical solution, preferably, the upper surface of the partition board is an inclined surface, and the inclined surface inclines downward from being close to the water outlet to being far away from the water outlet.

In the above technical solution, preferably, the water outlet holes are plural, and the plural water outlet holes are all distributed below the partition plate.

In the above technical solution, it is preferable that the water distributor is provided with a water-absorbing core at the water outlet, and a part of the water-absorbing core is exposed from the corresponding water outlet, and the water-absorbing core can guide the water flowing into the second chamber to the outside of the water distributor through the water outlet.

According to the mop, the vent hole communicated with the outside is formed in the water distributor, so that outside air can enter the first chamber from the second chamber more smoothly, cleaning water in the first chamber can easily enter the second chamber through the water outlet, the water sealing port communicated with the second chamber is formed in the lower portion of the water supply tank and is positioned at the lower portion of the water outlet and extends into the second chamber, water sealing can be formed at the water sealing port by the cleaning water filled in the second chamber, water flow in the second chamber is prevented from overflowing from the vent hole, water supply of the mop is smoother, the wetting efficiency of the mop is improved, and meanwhile the cleanness of the ground to be cleaned can be kept.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded schematic view of the present invention;

FIG. 3 is a schematic top view of the wet mopping apparatus of the present invention;

FIG. 4 is a first cross-sectional view of the wet floor mopping device of the present invention (with the outlet valve in a closed state);

FIG. 5 is an enlarged partial schematic view at A of FIG. 4;

FIG. 6 is a second schematic sectional view of the wet floor mopping device of the present invention (with the outlet valve in an open state);

FIG. 7 is an enlarged partial schematic view at B of FIG. 6;

FIG. 8 is an exploded schematic view of the water dispenser of the present invention;

FIG. 9 is a schematic bottom view of the housing cover of the water dispenser of the present invention;

FIG. 10 is a schematic top view of the remainder of the water dispenser of the present invention with the housing cover removed;

FIG. 11 is a schematic sectional view of a water dispenser of the present invention;

wherein: 11. a cleaning head body; 111. a suction port;

12. a base plate; 121. a receiving groove; 122. a notch;

13. a water supply tank; 131. a first chamber; 132. a water outlet; 133. sealing a water gap; 134. a tubular portion; 135. a water injection port; 136. a cover; 137. mounting holes;

14. a water dispenser; 141. a housing; 1411. a protrusion; 1412. an upper cover; 1413. a lower cover; 1414. positioning a groove; 1415. a bump; 1416. positioning the convex column; 142. a water inlet; 143. a second chamber; 144. a water outlet hole; 145. a vent hole; 146. a partition plate; 1461. a small hole; 1462. a first positioning hole; 1463. a through hole; 147. a water absorbent core; 1471. a second positioning hole;

15. a water outlet valve; 151. a plug; 152. a spring; 153. a seal ring;

16. an actuation member; 161. a rotating shaft;

17. rotating the connector;

18. a suction channel.

Detailed Description

For the purpose of illustrating the technical content, the constructional features, the achieved objects and the effects of the invention in detail, reference will be made to the following detailed description of the embodiments in conjunction with the accompanying drawings. The upper, lower, left, right, front and rear positional relationships described in this embodiment correspond to the positional relationships shown in fig. 1, respectively.

The cleaning head of the present invention is primarily intended for use on floor cleaning machines, which are devices for cleaning and/or vacuuming the floor to be cleaned, and may be, for example, wet and dry cleaners, or floor washers.

As shown in fig. 1 to 2, the cleaning head includes a cleaning head body 11, a base plate 12, a water supply tank 13, a water distributor 14, a rotary joint 17, and a suction passage 18.

Wherein, the rotary connector 17 is connected to the cleaning head body 11, a part of the suction passage 18 is accommodated in the cleaning head body 11, and the other part is arranged on the rotary connector 17. The bottom of the cleaner head body 11 is provided with two suction openings 111 which are opposed to each other in the front-rear direction. When the cleaning head is used in a floor cleaning machine, it is connected to the main part of the floor cleaning machine by means of the rotatable connection 17, for example by means of a wand or hose, to a suction unit on the floor cleaning machine, and the suction channel 18 is capable of drawing particles such as dirt from the floor to be cleaned into the suction opening 111 by means of the suction force of the suction unit. Of course, only one suction port 111 may be provided at the front of the cleaner head body 11, and the suction port 111 may be located at the front side of the cleaner head body 11, so that the functions of first sucking dust and then mopping the floor can be realized.

As shown in fig. 2 and 4, the water supply tank 13 is fixedly installed on the base plate 12, and the base plate 12 is used for installing a mop cloth for cleaning, and the water supply tank 13 is used for supplying water to the mop cloth. The lower portion of the water supply tank 13 has an open structure, and the bottom plate 12 is fixedly installed at the lower portion of the water supply tank 13 and closes the lower opening of the water supply tank 13, so that the water supply tank 13 and the bottom plate 12 enclose a first chamber 131. Specifically, the bottom plate 12 and the water supply tank 13 are connected by a snap fit, the lower edge of the side wall plate of the water supply tank 13 forms a connecting part, the bottom plate 12 is provided with a connecting groove which is arranged along the circumferential direction and is matched with the lower edge of the side wall plate of the water supply tank 13, and a waterproof sealing rubber strip is arranged in the connecting groove. Of course, the base plate 12 and the water service box 13 may be integrally formed for the convenience of injection molding manufacturing. Alternatively, the feed water tank 13 may be a closed tank consisting of a bottom wall and an outer casing, and the lower part of the tank may be provided with a connection to the bottom plate 12, so that water in the feed water tank 13 is guided to the bottom plate 12 through the connection to wet the mops.

The wet type floor mopping device is detachably mounted on the cleaning head body 11. Specifically, the water supply tank 13 has two tank portions opposed to each other on the left and right sides and a connecting portion connecting the two tank portions, which is hollow and formed integrally with the two tank portions. The space between the two box parts forms a clamping groove, the cleaning head body 11 is provided with a clamping part matched with the clamping groove, when the wet type mopping device is installed on the cleaning head body 11, the clamping part of the cleaning head body 11 is positioned in the clamping groove of the wet type mopping device, and the water supply tank 13 is positioned at the top of the cleaning head body 11. Of course, in order to facilitate installation of the mop cloth, it is not necessary to detach the entire wet type mop device from the cleaning head body 11, but it is only necessary to fix the water supply tank 13 and the cleaning head body 11 to each other and detachably install the bottom plate 12 on the bottom of the water supply tank 13. Alternatively, the bottom plate 12 may be fixed to or integrally formed with the lower portion of the cleaning head body 11, and the water supply tank 13 may be detachably mounted on the top of the cleaning head body 11.

Referring to fig. 3, a water filling port 135 is provided at the top of the water supply tank 13, and a cap 136 is installed at the water filling port 135, in order to facilitate the user to add cleaning water. When the cap 136 is covered at the water filling port 135, the upper portion of the water supply tank 13 is a closed structure, and the first chamber 131 inside thereof is closed.

As shown in fig. 4 and 5, the bottom plate 12 is provided at a lower portion thereof with a receiving groove 121, the water distributor 14 is installed in the receiving groove 121, and a lower end surface of the water distributor 14 is substantially flush with a lower surface of the bottom plate 12, so that the mop cloth is not easily damaged by unevenness after being installed on the bottom plate 12, and is suitable for being closely contacted with the floor to be cleaned, thereby enhancing the mopping effect. The water supply tank 13 is provided at the bottom thereof with a water outlet 132, the water outlet 132 being provided on the base plate 12, and the water outlet 132 communicating with the first chamber 131.

As shown in FIGS. 8-11, the water dispenser 14 includes a housing 141, a partition 146, and a wick 147. The housing 141 is formed by mutually buckling an upper cover 1412 and a lower cover 1413, the upper cover 1412 and the lower cover 1413 define a second chamber 143 therebetween, and the volume of the second chamber 143 is smaller than that of the first chamber 131. The partition 146 and the absorbent core 147 are respectively installed in the casing 141, and the partition 146 is located at the upper portion of the absorbent core 147. The partition 146 partitions the second chamber 143 into upper and lower halves, the upper half of the second chamber 143 forming a cavity into which water flows, and the lower half of the second chamber 143 accommodating a wick 147. The water-absorbent core 147 is made of a material having good water-absorption properties, such as water-absorbent resin, cellulose, polyacrylamide, absorbent cotton, sponge, silica gel, or the like.

In order to fasten the partition 146 and the absorbent core 147 in the second chamber 143 after the upper cover 1412 and the lower cover 1413 are fastened to each other, the upper cover 1412 is provided with a plurality of positioning slots 1414 and a plurality of downwardly extending protrusions 1415 along the length direction of the upper cover 1412, and the plurality of protrusions 1415 and the plurality of positioning slots 1414 are arranged adjacent to each other, i.e., one protrusion 1415 is arranged between every two positioning slots 1414. The lower cover 1413 is provided with water outlet holes 144 for inserting the plurality of bumps 1415 and a plurality of positioning convex columns 1416 matched with the plurality of positioning grooves 1414 along the length direction, the plurality of water outlet holes 144 and the plurality of positioning convex columns 1416 are arranged adjacent to each other in pairs, that is, one water outlet hole 144 is arranged between every two positioning convex columns 1416. The partition plate 146 is provided with a first positioning hole 1462 for the plurality of positioning convex columns 1416 to pass through and a plurality of through holes 1463 for the plurality of convex blocks 1415 to pass through along the length direction thereof, and the plurality of first positioning holes 1462 and the plurality of through holes 1463 are arranged adjacently in pairs, that is, one through hole 1463 is arranged between every two first positioning holes 1462. The absorbent core 147 is provided with a second positioning hole 1471 along the length direction thereof for passing the positioning posts 1416. The partition 146 is further provided with a plurality of vertically penetrating small holes 1461 through which water flows through the partition 146, and each small hole 1461 is integrally formed with a corresponding first positioning hole 1462.

When the water absorption core 147 and the partition 146 are assembled in the casing 141, the positioning convex columns 1416 on the lower cover 1413 sequentially pass through the second positioning holes 1471 on the water absorption core 147 and the first positioning holes 1462 on the partition 146, and are finally inserted into the positioning grooves 1414 on the upper cover 1412; meanwhile, the plurality of protrusions 1415 on the upper cover 1412 pass through the plurality of through holes 1463 on the partition 146 and are inserted into the plurality of water outlet holes 144 on the lower cover 1413, during which, the portions of the water absorbent core 147 except for the second positioning hole 1471 are pressed into the plurality of water outlet holes 144 by the plurality of positioning protrusions 1415 on the upper cover 1412 and are exposed from the water outlet holes 144. That is, the plurality of outlet holes 144 are all distributed below the partition 146.

The upper cover 1412 is provided with a water inlet 142 communicating with the second chamber 143. as shown in fig. 4 and 6, when the water distributor 14 is installed at the lower portion of the bottom plate 12, the water inlet 142 communicates with the water outlet 132 of the bottom plate 12, and the water inlet 142 of the water distributor 14, the second chamber 143 and the plurality of water outlet holes 144 communicate with each other in sequence, the wick 147 can guide the water flowing into the second chamber 143 to the outside of the housing 141, i.e., to the mop located at the lower portion thereof, to wet the mop.

Since the water outlet 132 is disposed at a side of the bottom plate 12, a portion of the plurality of water outlet holes 144 is close to the water outlet 132, and another portion is far from the water outlet 132, the water entering the second chamber 143 fills up faster at a side close to the water outlet 132 and slower at a side far from the water outlet 132. In order to solve this problem, it is necessary to rapidly introduce the external air into the second chamber 143 and the first chamber 131 so that the water in the first chamber 131 rapidly and smoothly fills the second chamber 143. The upper portion of the case 141 is provided with a vent hole 145 for communicating the outside with the second chamber 143, and specifically, the upper cover 1412 of the case 141 is provided with the vent hole 145, the lower portion of the bottom plate 12 is further provided with a notch 122 penetrating the bottom plate 12, and the vent hole 145 is communicated with the notch 122. Thus, the external air enters the second chamber 143 through the vent hole 145, and then enters the first chamber 131 through the second chamber 143, and the water in the first chamber 131 flows into the second chamber 143 through the outlet 132 and then flows into the outlet holes 144 from the second chamber 143, so that the mop wetting efficiency is higher. In addition, in order to improve the fluidity of the water flow in the second chamber 143, it is preferable that the upper surface of the partition plate 146 is formed as an inclined surface which is inclined downward from a position near the water outlet 132 to a position far from the water outlet 132.

Since the water level in the first chamber 131 is higher than that in the second chamber 143, in order to prevent water filled in the second chamber 143 from overflowing from the vent hole 145 to the external environment and causing water leakage of the water supply tank 13, as shown in fig. 7, the lower portion of the water supply tank 13 is provided with a water sealing port 133 communicated with the second chamber 143, and the water sealing port 133 is located at the lower portion of the water outlet 132 and at least partially extends into the second chamber 143. Specifically, the water supply tank 13 is provided with a downwardly extending tubular portion 134 at the water outlet 132, where the tubular portion 134 is integrally formed with the bottom plate 12. The tubular portion 134 extends downwardly into the second chamber 143, and the water seal port 133 is provided on the outer peripheral wall of the tubular portion 134, but may be provided on the bottom wall of the tubular portion 134. And the depth of the water sealing port 133 is preferably not greater than the depth of the second chamber 143, so that the water flow filling the second chamber 143 can form a water-tight seal at the water sealing port 133. The water sealing means that when the second chamber 143 is filled with water, the water level in the second chamber 143 is equal to the water level at the water sealing port 133, so that the water in the first chamber 131 does not enter the second chamber 143 any more. That is, when the water sealing port 133 is exposed from the liquid surface of the second chamber 143, the air entering the second chamber 143 from the vent hole 145 can enter the first chamber 131 via the water sealing port 133; when the water shut-off valve 133 is located below the liquid level of the second chamber 143, the flow of the outside air from the second chamber 143 into the first chamber 131 is stopped. On this basis, in order to further improve the water leakage preventing effect of the water supply tank 13, it is preferable that the top wall of the second chamber 143 is designed to have a protrusion 1411 partially protruding upward, and the vent hole 145 is opened on the protrusion 1411, and the vent hole 145 is preferably disposed away from the water outlet 132 such that the height of the water level in the second chamber 143 is slightly lower than the height of the vent hole 145.

Of course, to facilitate the injection molding of the water service box 13, the housing 141 of the water dispenser 14 is at least partially formed integrally with the bottom plate 12.

In order to prevent the user from continuing to flow water in the water service box 13 into the second chamber 143 through the water outlet 132 after finishing the mopping operation, the water content of the mop cloth is excessive, thereby leaving a large water stain on the floor to be cleaned. As shown in fig. 4 and 6, an outlet valve 15 for opening and closing the outlet 132 is installed at the outlet 132, and an actuator 16 for a user to operate and drivingly connected to the outlet valve 15 is provided at an upper portion of the water supply tank 13. In use, the user operates the actuator 16 to actuate the outlet valve 15, thereby opening or closing the outlet 132 at the bottom of the water supply tank 13.

Specifically, the water supply tank 13 is provided with a mounting hole 137, the outlet valve 15 includes a plug 151 and a spring 152 mounted in the mounting hole 137, one end of the spring 152 is connected to the plug 151, the other end is connected to the mounting hole 137, and a seal ring 153 is mounted on the lower end of the plug 151. The operating member 16 is a push button member, one end of which is attached to the water supply tank 13 via a rotating shaft 161, and the other end of which constitutes a trigger portion to be pushed or stepped by a user, and the upper end of the plug 151 is in close contact with the push button member. Of course, the actuating member 16 is not limited to the button-type rotating member, but may be a moving member, and the structure of the outlet valve 15 is not limited to the plug 151 moving in the up-and-down direction, but may also be a cover plate moving in the horizontal direction, for example, the moving member and the cover plate are fixedly connected, when in use, the user operates the moving member to drive the cover plate to move in the horizontal direction, so that the cover plate and the outlet 132 are staggered or opposite to each other, thereby opening or closing the outlet 132.

When the outlet valve 15 is closed, as shown in fig. 4, the water in the first chamber 131 does not enter the second chamber 143 any more, and the water in the second chamber 143 continues to flow to the plurality of outlet holes 144 to wet the mops until it is running out.

When the outlet valve 15 is opened, as shown in fig. 6, the water in the first chamber 131 enters the second chamber 143 again, and the second chamber 143 is filled with water again and flows to the plurality of outlet holes 144 to wet the mop.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A cleaning head for a floor cleaning machine, comprising:

a cleaning head body (11) with at least one suction opening (111) at the bottom;

a base plate (12) for mounting a cleaning mop;

a water supply tank (13) for supplying water to the mop, wherein the water supply tank (13) is mounted on the cleaning head body (11) and positioned above the bottom plate (12), a first closed cavity (131) is arranged in the water supply tank (13), and a water outlet (132) is arranged at the lower part of the water supply tank;

the water distributor (14) is installed on the bottom plate (12), the water distributor (14) comprises a shell (141), a water inlet (142) formed in the top of the shell (141), a second chamber (143) formed inside the shell (141), a plurality of water outlet holes (144) formed in the lower bottom of the shell (141), and vent holes (145) formed in the upper portion of the shell (141) and communicated with the outside, the volume of the second chamber (143) is smaller than that of the first chamber (131), the water outlet (132), the water inlet (142), the second chamber (143) and the water outlet holes (144) are sequentially communicated, a water sealing hole (133) communicated with the second chamber (143) is formed in the lower portion of the water supply tank (13), and the water sealing hole (133) is located in the lower portion of the water outlet (132) and extends into the second chamber (143) The vent hole (145) is arranged far away from the water sealing port (133), and the water outlet holes (144) are positioned between the vent hole (145) and the water sealing port (133); when the water sealing port (133) is exposed from the liquid surface of the second chamber (143), air entering from the vent hole (145) can enter the first chamber (131) from the second chamber (143) through the water sealing port (133); when the water sealing port (133) is positioned below the liquid level of the second chamber (143), the air stops flowing from the second chamber (143) to the first chamber (131).

2. A cleaning head for a floor cleaning machine as claimed in claim 1, wherein: the water distributor (14) is detachably arranged on the bottom plate (12).

3. A cleaning head for a floor cleaning machine as claimed in claim 1, wherein: the housing (141) of the water dispenser (14) is at least partially formed integrally with the base plate (12).

4. A cleaning head for a floor cleaning machine as claimed in claim 1 or 2, wherein: the bottom plate (12) is integrally formed with the water supply tank (13) and is detachably mounted on the cleaning head body (11).

5. A cleaning head for a floor cleaning machine as claimed in claim 1 or 2, wherein: the bottom plate (12) is fixedly arranged at the bottom of the cleaning head body (11), and the water supply tank (13) is detachably arranged at the top of the cleaning head body (11).

6. A cleaning head for a floor cleaning machine as claimed in claim 1 or 2, wherein: the top of the shell (141) is partially protruded upwards to form a protrusion (1411), and the vent hole (145) is arranged on the protrusion (1411).

7. A cleaning head for a floor cleaning machine as claimed in claim 1, wherein: the water supply tank (13) is internally provided with a water outlet valve (15), the water outlet valve (15) is arranged at the water outlet (132) and used for opening and closing the water outlet (132), and the outside of the water supply tank (13) is provided with an action piece (16) in transmission connection with the water outlet valve (15).

8. A cleaning head for a floor cleaning machine as claimed in claim 1, wherein: the water supply tank (13) is provided with a downward extending tubular part (134) at the position of the water outlet (132), the tubular part (134) extends downwards into the second chamber (143), and the water sealing opening (133) is arranged on the tubular part (134).

9. A cleaning head for a floor cleaning machine as claimed in claim 1, wherein: the water distributor (14) comprises a partition plate (146) arranged in the second chamber (143), the partition plate (146) divides the second chamber (143) into an upper part and a lower part, and a plurality of small holes (1461) communicated with the upper part and the lower part of the second chamber (143) are formed in the partition plate (146).

10. A cleaning head for a floor cleaning machine as claimed in claim 9, wherein: the upper surface of the partition (146) is an inclined surface which inclines downwards from a position close to the water outlet (132) to a position far away from the water outlet (132).

11. A cleaning head for a floor cleaning machine as claimed in claim 9, wherein: the water outlet holes (144) are multiple, and the water outlet holes (144) are all distributed below the partition plate (146).

12. A cleaning head for a floor cleaning machine as claimed in claim 1, wherein: the water distributor (14) is provided with a water absorption core (147) at the position of the water outlet hole (144), the water absorption core (147) is partially exposed out of the position of the corresponding water outlet hole (144), and the water absorption core (147) can guide the water flowing into the second chamber (143) to the outside of the water distributor (14) through the water outlet hole (144).