CN108378777B

CN108378777B - Recovery barrel and dust collector thereof

Info

Publication number: CN108378777B
Application number: CN201810184333.2A
Authority: CN
Inventors: 查晓亮; 薛金城
Original assignee: Tek Technology Co ltd
Current assignee: Tek Technology Co ltd
Priority date: 2018-03-07
Filing date: 2018-03-07
Publication date: 2020-09-29
Anticipated expiration: 2038-03-07
Also published as: CN108378777A

Abstract

The invention provides a recovery bucket and a dust collector thereof, wherein the recovery bucket comprises a bucket body (212) for containing liquid and a top cover (211) detachably connected with the bucket body, wherein the top cover is provided with at least two openings (213), so that one of the openings can be selected by liquid to enter the interior of the bucket body, and the other opening is used for exhausting air in the bucket body. The two openings symmetrically arranged on the top cover effectively balance the air pressure in the barrel and promote the recovery barrel to efficiently recover liquid; meanwhile, the capacity of the recycling bin is detected, and early warning is timely carried out to prevent overflow; simple structure, convenient to use improve clean efficiency.

Description

Recovery barrel and dust collector thereof

Technical Field

The invention relates to a recycling bin and a dust collector thereof, belonging to the technical field of small household appliance manufacturing.

Background

In the daily floor cleaning process of a family, stubborn stains attached to the surface to be cleaned are often encountered and are not easy to remove. In this case, a vacuum cleaner having a liquid-containing tank and a recovery tank is generally used to treat a surface to be cleaned. Clean liquid in the liquid containing barrel is sprayed to the surface to be cleaned through a floor brush head of the dust collector, and residues on the surface to be cleaned are adsorbed into the recycling bin after stubborn stains are removed. Current recycling bin only sets up an opening, and when absorbent liquid got into the recycling bin through this opening, the difficult discharge of air in the bucket can cause the hindrance to the collection of liquid in the recycling bin. In addition, because the capacity of recycling bin is limited, need in time empty, need open the top cap when empty moreover at every turn, the operation process is more loaded down with trivial details like this, brings a great deal of inconvenience for the user.

Disclosure of Invention

The invention aims to solve the technical problem that the prior art is not enough, and provides a recovery barrel and a dust collector thereof, wherein the two openings symmetrically arranged on a top cover effectively balance the air pressure in the barrel and promote the recovery barrel to efficiently recover liquid; meanwhile, the capacity of the recycling bin is detected, and early warning is timely carried out to prevent overflow; simple structure, convenient to use improve clean efficiency. The liquid is poured directly from the two openings without opening the top cover.

The technical problem to be solved by the invention is realized by the following technical scheme:

a recycling bin comprises a bin body for containing liquid and a top cover detachably connected with the bin body, wherein the top cover is provided with at least two openings, so that liquid can be selected from one of the openings to enter the bin body, and meanwhile, the other of the openings is used for exhausting air in the bin body.

In order to conveniently judge the liquid level contained in the recovery barrel, the top cover further comprises a guide rail and a floater moving along the guide rail; when the top cover is connected with the barrel body, the floater is positioned inside the barrel body.

The guide rail extends along the height direction of the barrel body, and the floater moves on the guide rail under the buoyancy action of liquid in the recovery barrel.

In order to facilitate disassembly, the top cover and the barrel body are detachably connected through a first connecting structure, and the first connecting structure is positioned between the two openings; the openings are symmetrically arranged relative to a central axis of the recovery barrel.

In addition, the recycling bin also comprises a second connecting structure for integrally disassembling and assembling; the second connecting structure is located inside a top portion of the top cover.

The invention also provides a dust collector which comprises a main machine, a floor brush head and an extension pipe positioned between the main machine and the floor brush head, and also comprises a cyclone separation structure for separating gas-liquid mixture, a recovery bucket for storing separated liquid and a liquid containing bucket for providing cleaning liquid, wherein the recovery bucket is the recovery bucket.

Particularly, the dust catcher is still including providing the wind channel of ground brush head wind-force, the staving cross sectional shape of recycling bin is inboard straight outside half-circular arc, and the mid position of straight inboard is equipped with inside sunken accommodation space, the wind channel holds in the accommodation space.

The cross section of the liquid containing barrel is in the shape of a semicircular arc with a straight inner side and a straight outer side, and the cross section of the liquid containing barrel is opposite to the straight inner side of the recovery barrel, so that the liquid containing barrel and the recovery barrel are symmetrically surrounded on the outer side of the air channel.

In order to facilitate monitoring of the volume of liquid in the recovery barrel, the dust collector further comprises a Hall sensor which is arranged in the barrel body of the recovery barrel and is provided with a water level warning line in a position corresponding to the water level warning line, and when the liquid stored in the barrel body reaches the preset volume, an early warning signal is generated.

For convenient operation, the liquid containing barrel is arranged at the front side close to the floor brush head, and the recycling barrel is arranged at the rear side far away from the floor brush head.

In summary, the invention provides a recycling bin and a dust collector thereof, wherein the two openings symmetrically arranged on the top cover effectively balance the air pressure in the bin and promote the recycling bin to efficiently recycle liquid; meanwhile, the capacity of the recycling bin is detected, and early warning is timely carried out to prevent overflow; simple structure, convenient to use improve clean efficiency.

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the vacuum cleaner of the present invention;

FIG. 2 is a schematic view of the arrangement of the liquid-containing barrel and the recycling barrel of the present invention;

FIG. 3 is a schematic view of a cyclonic water-vapor separation structure according to the present invention;

FIG. 4 is a schematic view of the recycling bin of the present invention;

FIG. 5 is a schematic view of a recycling bin according to the present invention;

FIG. 6 is a schematic view of the water spraying mechanism assembly of the floor brush of the present invention;

FIG. 7 is a schematic view of the nozzle arrangement of the present invention.

Detailed Description

FIG. 1 is a schematic view of the overall structure of the vacuum cleaner of the present invention; FIG. 2 is a schematic view of the arrangement of the liquid-containing barrel and the recycling barrel of the present invention. As shown in fig. 1 and 2, the present invention provides a vacuum cleaner, which includes a main body 100, a cleaning accessory 300, and an extension pipe 200 connected between the main body 100 and the cleaning accessory 300, wherein the extension pipe 200 is a straight rod structure with a hollow interior, and can enable the cleaning accessory 300 and the main body 100 to communicate with each other. Wherein, the extension tube 200 is used to make the main body 100 be located at a position substantially flush with the natural vertical height of the user's arm when the cleaning attachment 300 is supported on the floor, so that the user does not need to bend his or her knees or bend his or her body too straightly, thus saving labor during the operation. In order to facilitate the holding operation of the user, the main body 100 is handheld, and a handle 101 is disposed on one side of the main body 100. The main body 100 further includes a dust-air separating device for separating air and dust in the air, the dust-air separating device is a dry type separating device, and a suction wet type separating device is not used inside the main body 100 for small size and portability. In addition, a vacuum source for generating suction and a battery for supplying power to the vacuum source are disposed in the main body 100, a main body connector 110 and a cleaning accessory 300 are disposed at upper and lower ends of the extension pipe 200, respectively, a length direction of the extension pipe 200 is an axial direction, and an interface (not shown) for physically and electrically connecting the extension pipe 200 to one side of the main body 100 is disposed.

The cleaning attachment 300 includes a ground brush head 302 that may have a surface for treatment and a reservoir unit for a wet cleaning process. The liquid storage unit can spray clean water for cleaning through the ground brush head, wet and clean the surface to be treated, and further suck away dirty water after cleaning, so that the surface to be treated is kept clean. The liquid storage unit is detachably connected with one end of the extension pipe 200 through a connecting structure, and the connecting structure can be a common buckle or other structures, so that the liquid storage unit is convenient and quick to detach and connect. When the liquid storage unit is connected to the extension pipe 200, the liquid storage unit is integrally extended along the axial direction of the extension pipe 200, the interior of the liquid storage unit comprises an air duct 201 for communicating the ground brush head 302 with the extension pipe 200, and air mixed with dust and water passes through the interior of the air duct 201. The liquid storage unit is further provided with a recovery barrel 210 for recovering sewage and a liquid containing barrel 220 for providing cleaning liquid, the main machine connector 110 is connected with the main machine 100, and the floor brush connector 310 is connected with the floor brush head 302. Retrieve half of recovery bucket 210 and appearance liquid bucket 220 symmetry and surround wind channel 201 setting, hold liquid bucket 220 and be located the front side, promptly: on the side near the floor brush head 302, the recycling bin 210 is located on the rear side, namely: away from the side of the brush head 302. Therefore, the liquid containing barrel 220 can be ensured to be the shortest liquid supply line for the floor brush head 302, and a certain inclination between the recovery barrel 210 and the surface to be cleaned can be kept in the use process, so that the recovery of waste water is facilitated. Referring to fig. 2, the cross-sectional shapes of the recycling bin 210 and the liquid containing bin 220 are the same, and are both inner straight outer half arcs, an inward concave accommodating space is provided in the center of the straight inner side for accommodating the air duct 201, the straight inner sides of the liquid containing bin 220 and the recycling bin 210 are opposite, and surround the two sides of the air duct 201, and the outer shape is cylindrical as shown in fig. 1.

In order to achieve the water-vapor separation, the vacuum cleaner further comprises a cyclone type separation structure 400. The cyclonic separation structure 400 is generally a chamber structure extending in an axial direction and having an inlet end 401 and an outlet end 402 distributed axially on either side of the water-steam separation structure. The inlet end 401 is positioned at one side facing the floor brush head 302, and the inlet end 401 is arranged downwards after installation and is connected with the air duct 201; the outlet end 402 is disposed upward and connected to the extension pipe 200, so that the cyclone-type separation structure 400 is disposed above the recycling bin 210 and the liquid-containing bin 220 surrounding the two sides of the air duct 201. In operation, the mixed gas enters the interior of the separation structure 400 from the inlet end 401, and after passing through the plurality of chambers, the liquid separated from the mixed gas is collected in the recycling bin 210, and the separated gas is discharged.

Specifically, the cyclone separation structure 400 includes an inner wall 410, a middle wall 420 and an outer wall 430 which are sleeved from inside to outside to form three chambers which are arranged in a circuitous manner, the three chambers are a first chamber a, a second chamber B and a third chamber C from inside to outside, the three chambers are nested around the same axis, and the three chambers effectively prolong the moving path of water vapor in the cyclone separation structure 400, so that the water vapor is separated more thoroughly. Further, a first chamber a surrounded by the inner wall 410 is located at the radially inner end of the whole cyclone-type separation structure 400, an inlet 414 is arranged at the bottom end of the first chamber a, the inlet is flared, the top end of the inlet 401 is correspondingly provided with a protruding lug 403, the bottom of the first chamber a is hermetically connected with a channel inside the inlet 401, and during assembly, a flared opening of the inlet 414 is correspondingly used for accommodating the lug 403. A support column 411 and a spiral guide 412 disposed around the support column 411 are disposed in the first chamber a. The middle wall 420 is sleeved on the periphery of the inner wall 410, a space surrounded by the two forms a second chamber B, the top of the first chamber A is provided with a first opening 413 for discharging water vapor to the second chamber B at the radial middle end, and therefore, the opening position of the first opening 413 is close to the top end of the second chamber B. The top end of the second chamber B is closed, the bottom end is provided with a second opening 421, and the second opening 421 is an annular opening. In order to ensure that the three chambers are arranged in a circuitous manner, the mixed gas can sequentially pass through the first chamber A and the second chamber B and then enter the third chamber C, the tail end of the inner wall 410 protrudes out of the tail end of the middle wall 420, the middle wall 420 extends upwards at the closed position of the top end of the second chamber B to form an air passage 422, a plurality of meshes 423 are formed in the wall surface of the air passage 422, and the top end of the air passage 422 is connected with the extension pipe 200. In this embodiment, the air duct 422 and the middle wall 420 are integrally formed for convenience of manufacturing. In practical applications, the air passage 422 may be formed as another element separately and then fixed to the top end of the middle wall 420. The outer wall 430 surrounds the middle wall 420, and the space surrounded between the outer wall and the middle wall 420 forms a third chamber C. The mesh 423 of the air passage is in communicating relationship with the third chamber C, thereby ensuring that the chamber C is in communicating relationship with the air passage 422 through the mesh 423.

From the above, the present invention is an improvement of the prior art, and adds a cyclone separation structure 400 to the extension tube rod structure located at the center of the vacuum cleaner, so as to overcome the defect that the cyclone separation structure of the prior art can only be used for separating dust and air, and cannot separate liquid and air.

FIG. 3 is a schematic view of the cyclone water-vapor separation structure of the present invention. As shown in fig. 3, in the water-vapor separation structure of the present invention, the flow direction of the gas-liquid mixture is such that:

when the vacuum cleaner starts to work, the air inlet of the floor brush 300 sucks in the water-vapor mixture, the water-vapor mixture enters the first chamber A from the inlet channel 401, the water-vapor mixture passing through the chamber A is guided by the spiral guide structure 412 to generate a whirlwind type vortex advancing path, and the gas-liquid mixture enters the second chamber B from the first opening 413 arranged at the top of the first chamber A, wherein the first opening 413 is arranged close to the top of the second chamber B. Since the second opening 421 of the second chamber B is disposed at the bottom of the second chamber B, the mixture advances along a spiral from the first opening 413 near the top to the second opening 421 of the second chamber B at the bottom, and the spirally advancing mixture enters the third chamber C through the second opening 421 of the second chamber B. The mixture introduced into the second chamber B, in which a part of the moisture is collected on the inner side of the middle wall 420 of the second chamber B due to the centrifugal force of the spiral, moves into the recovery tub 210 through the second opening 421 as it flows down along the wall surface of the middle wall 420 by gravity. The remaining mixture, which also includes another portion of the water vapor, exits the second chamber B through a second opening 421 at the bottom end of the second chamber B and enters the third chamber C. The remaining mixture entering the third chamber C is spirally rotated at a high speed, wherein the liquid part flows downwards along the outer wall 430 of the third chamber C to the collection area 432 under the action of gravity and finally enters the recycling bin 210, so that the liquid in the mixed gas is separated from the mixed gas, temporarily stays at the bottom of the third chamber C, flows into the recycling bin 210 from a third opening 431 arranged at the bottom of the third chamber C for storage, and the clean gas in the mixture enters the gas passage 422 from a mesh 423 at the top of the third chamber C and is discharged to the outside, thereby realizing the complete separation of gas and liquid. In brief, the gas-liquid mixture is sucked into the vertical air channel from the suction nozzle of the floor brush, and then enters the first chamber a, the second chamber B and the third chamber C of the cyclone-type separation structure 400 in sequence to be separated, the liquid enters the recovery barrel 210 from the third opening 431 at the bottom in the third chamber C, and the air enters the air channel 422 from the mesh 423 at the top of the third chamber C and is discharged to the outside.

FIG. 4 is a schematic view of the recycling bin of the present invention; FIG. 5 is a schematic view of the recycling bin of the present invention. As shown in fig. 4 and 5 in combination with fig. 2, the recycling bin 210 of the present invention includes two parts, namely a top cover 211 and a bin 212, wherein the top cover 211 and the bin 212 are connected by a snap structure, and are easy to detach, which facilitates cleaning of the liquid collected in the bin 212. And the top cover 211 is provided with two openings 213, and the two openings 213 are symmetrically arranged about the central axis of the recycling bin. After being mixed, the dirty liquid and the air are sucked into the recycling bin along with one opening 213 of the two openings 213, and the other opening 213 is used for discharging the air out of the recycling bin, so that the effect of balancing the air pressure in the recycling bin is achieved, and the recycling bin is favorable for efficiently absorbing the dirty liquid. Generally, since the interior of the barrel 212 has air, the liquid needs to be pushed out of the air when entering the barrel 212. In general, the recycling bin 210 is disposed in an inclined manner during the actual use, so that the two openings 213 are necessarily located at a lower side in the vertical direction and at an upper side in the vertical direction. Under the gravity of the liquid, the liquid enters the recycling bin 210 from one opening 213 at the lower side, and the air in the recycling bin 210 is discharged out of the recycling bin 210 from the other opening 213 at the upper side. As shown in fig. 5, the shapes and the opening areas of the two openings 213 are completely the same, and in practical applications, the shapes and the areas of the two openings may not be completely the same according to the arrangement requirement. Such as: can set up one of them opening into the air inlet, circular and the area is little slightly, and another opening then sets up to the great recovery mouth of rectangle and area, also can realize like this that it goes on with the exhaust in step, makes waste water recovery more smooth and easy.

To facilitate disassembly, the top cover 211 and the barrel 212 are detachably connected by a first connecting structure 216, and the first connecting structure 216 is located between the two openings 213. In addition, the recycling bin 210 further comprises a second connecting structure 217 for integral disassembly and assembly, wherein the second connecting structure 217 is positioned at the inner side of the top cover 211. The angles of the first connection structure 216 and the second connection structure 217 are different due to the different angles of the connection.

In addition, a guide rail 214 is provided below the top cover 211, the float 215 is fixed on the guide rail 214, and the guide rail 214 limits the up-and-down movement of the float 215. When the top cover 211 is covered on the tub 212, the float 215 is positioned at an upper middle portion in the tub 212 of the recovery tub 210 due to the guide rail 214 having a certain length, and the float 215 is moved up and down by buoyancy generated by the liquid stored in the tub 212. A magnet is arranged in the floater 215, and a hall sensor (not shown in the figure) is arranged at the corresponding alarm line position of the floater 215 for sensing. When the liquid that stores in the recycling bin reaches certain capacity, the liquid level lifts the float to the warning line position, and the magnet and the hall sensor that correspond the setting send early warning suggestion, for example: an audible alarm or a flashing warning light, etc., to alert the user to empty the accumulated liquid in the bucket body 212. The cross sectional shape of staving 212 is the straight outside semicircle of inboard, and the mid position of straight inboard is equipped with inside sunken accommodation space for hold wind channel 201. The liquid containing barrel 220 and the recycling barrel 210 are identical in shape, as shown in fig. 2, the straight inner sides of the two are opposite, and the outer shape is close to a cylinder after the two sides of the air duct 201 are encircled.

FIG. 6 is a schematic view of the water spraying mechanism assembly of the floor brush of the present invention. As shown in fig. 6, a rolling brush 301 (not shown) is arranged in a floor brush head 302 of the cleaning accessory 300, a plurality of nozzles 310 are arranged behind the rolling brush, so that the cleaning solution can be directly sprayed on the nap of the rolling brush, and the cleaning solution is uniformly stirred on the nap of the rolling brush through the high-speed rotation of the rolling brush, so that the cleaning effect of the nap of the rolling brush on the floor is greatly improved. Specifically, the floor brush head has a housing located at the rear side of the roll brush, and the nozzle 310 is provided on the rear housing. In general, the nozzles 310 are disposed on the left and right sides of the roller brush, and may be disposed in multiple numbers according to actual needs, such as: four, six or eight are possible. The shape of the nozzle 310 is not limited, such as: can be an independent spray head structure or a module with a honeycomb-shaped small opening similar to a spray head.

FIG. 7 is a schematic view of the nozzle arrangement of the present invention. As shown in fig. 7, each nozzle 310 may be disposed higher than the central axis 3011 of the roll brush 301 but not higher than the edge line 3012 of the roll brush, that is: the nozzle 310 coincides with the projection of the roller brush in the axial direction and may be disposed within the range of the hatched portion in fig. 7. The ratio of the distance H1 from the nozzle 310 to the centerline to the distance H2 from the nozzle 310 to the side brush edge H2 ranges between 40% and 80%, preferably 60%, such as: the ratio of the two may be H1: h2 ═ 3: 2.

in addition, as shown in fig. 1 and fig. 6, the floor brush 300 mainly includes a bracket 311 and an upper cover 312 buckled above the bracket 311, wherein the front side of the bracket 311 is used for fixing the rolling brush 301, and the rear side is used for fixing the rolling brush motor 313 and the water spraying mechanism component. The water spraying mechanism component mainly comprises a water pump 314, a water conveying pipeline and a control valve, the liquid containing barrel 220 is communicated with the water pump 314 through an electromagnetic valve 316, the water pump 314 is connected with a water inlet pipeline 315 and a water outlet pipeline 317, the water inlet pipeline 315 is communicated with the electromagnetic valve 316, and the water outlet pipeline 317 is shunted to the nozzle 310 through a three-way shunt valve 318 for spraying water. The plurality of nozzles 310 are fixed to a bracket 311. Referring to fig. 6, for compact volume setting, the water pump 314 and the electromagnetic valve 316 are respectively disposed at two sides of the suction port of the floor brush located at the center, the water pump 314 is disposed near one side of the motor 313, the three-way diverter valve 318 is disposed at the middle position, the plurality of water outlet pipes 317 are respectively connected with the plurality of nozzles 310 one by one and disposed between the gaps of the above components, and the reasonable position arrangement can ensure that the volume of the floor brush 302 is compressed to the minimum.

In the working process, the rolling brush motor 313 and the water pump 314 are started, the rolling brush 301 starts to rotate, and at the moment, the liquid in the liquid containing barrel 220 sequentially passes through the water inlet pipeline 315 and the electromagnetic valve 316, and is sprayed out of the plurality of nozzles 310 through the water outlet pipeline 317 and onto the rotating rolling brush 301 under the shunting action of the three-way diverter valve 318. The rolling brush 301 rolls on the surface to be cleaned, the air inlet of the floor brush 300 sucks in the water-vapor mixture, the water-vapor mixture enters the first chamber a from the inlet channel 401, under the guiding action of the spiral guiding structure 412, the water-vapor mixture passing through the chamber a is mixed to generate a cyclone-type vortex advancing path, and the gas-liquid mixture enters the second chamber B from the first opening 413 arranged at the top of the first chamber a. The mixture introduced into the second chamber B, in which a part of the moisture is collected on the inner side of the middle wall 420 of the second chamber B due to the centrifugal force of the spiral, flows downward along the wall surface of the middle wall 420 under the gravity, and flows into the recovery tub 210 through the second opening 421. The remaining mixture, which also includes a portion of the water vapor, exits the second chamber B through a second opening 421 at the bottom end of the second chamber B and enters the third chamber C. The remaining mixture entering the third chamber C is spirally rotated at a high speed, wherein the liquid part flows downwards along the outer wall 430 of the third chamber C to the collection area 432 under the action of gravity and finally enters the recycling bin 210, so that the liquid in the mixed gas is separated from the mixed gas, temporarily stays at the bottom of the third chamber C, flows into the recycling bin 210 from a third opening 431 arranged at the bottom of the third chamber C for storage, and the clean gas in the mixture enters the gas passage 422 from a mesh 423 at the top of the third chamber C and is discharged to the outside, thereby realizing the complete separation of gas and liquid.

Claims

1. A recovery barrel comprises a barrel body (212) for containing liquid and a top cover (211) detachably connected with the barrel body, and is characterized in that the recovery barrel is used for being communicated with a cyclone separation structure (400) for separating gas-liquid mixture, at least two openings (213) are formed in the top cover, so that one of the openings can be selected by liquid flowing out of the cyclone separation structure (400) to enter the barrel body, and meanwhile, the other opening is used for discharging air in the barrel body.

2. A recycling bin as claimed in claim 1, wherein said top cover (211) further comprises a guide rail (214) and a float (215) moving along said guide rail; the float is located inside the tub (212) when the top cover (211) is coupled to the tub.

3. A recovery bucket as claimed in claim 2, in which the guide (214) extends along the height of the bucket body (212), the float (215) moving on the guide under the buoyancy of the liquid in the recovery bucket.

4. The recycling bin of claim 1, wherein said top cover (211) and bin body (212) are removably connected by a first connecting structure (216) located between said two openings (213);

the openings (213) are symmetrically arranged relative to the central axis of the recycling bin.

5. The recycling bin of claim 4, wherein said recycling bin (210) further comprises a second connecting structure (217) for integral disassembly;

the second connecting structure is located inside a top portion of the top cover (211).

6. A vacuum cleaner comprising a main body (100), a floor brush head (302) and an extension tube (200) between the main body and the floor brush head, the vacuum cleaner further comprising a cyclonic separation structure (400) for separating a gas-liquid mixture, a recovery tank (210) for storing separated liquid and a liquid containing tank (220) for providing cleaning liquid, characterized in that the recovery tank is according to any one of claims 1-5.

7. The vacuum cleaner as claimed in claim 6, further comprising an air duct (201) for providing the wind force to the floor brush head (302), wherein the cross-sectional shape of the barrel body of the recycling barrel (210) is an inner straight outer semi-circular arc, an inwardly concave accommodating space is arranged at a central position of the straight inner side, and the air duct is accommodated in the accommodating space.

8. The vacuum cleaner as claimed in claim 7, wherein the cross-sectional shape of the liquid containing barrel (220) is an inner straight outer semi-circular arc and is disposed opposite to the straight inner side of the recycling barrel (210), so that the liquid containing barrel and the recycling barrel are symmetrically enclosed outside the air duct (201).

9. The vacuum cleaner as claimed in claim 6, further comprising a hall sensor provided in a predetermined water level guard line and at a position corresponding thereto in the tub body (212) of the recovery tub (210), and generating an early warning signal when the liquid stored in the tub body reaches a predetermined volume.

10. The vacuum cleaner according to claim 6, characterized in that the liquid containing bucket (220) is arranged at the front side close to the floor brush head (302), and the recovery bucket (210) is arranged at the rear side far from the floor brush head.