CN221786143U - Surface cleaning device - Google Patents

Abstract

The utility model discloses a surface cleaning device, which belongs to the technical field of cleaning equipment and comprises a machine body and a floor brush, wherein the floor brush is provided with a sewage suction port, the machine body is provided with a sewage bucket and a sewage suction fan, the sewage bucket comprises a bucket body with a sewage inlet pipe and a bucket cover with an air exhaust channel, the sewage suction fan provides sewage suction air flow formed by suction, the sewage suction air flow flows into the sewage bucket from the sewage inlet pipe and flows out of the sewage bucket through the air exhaust channel, the sewage bucket is provided with a highest liquid level, a baffle plate higher than the highest liquid level is arranged in the sewage bucket, the baffle plate divides an inner cavity of the sewage bucket into an upper cavity and a lower cavity, the baffle plate is provided with a ventilation opening, an anti-surge part higher than the highest liquid level is arranged in the lower cavity, and the anti-surge part is positioned right below the ventilation opening. Utilize the anti-surge piece to reduce the sewage bucket and follow the fuselage and pour into the dirty liquid of upper chamber through the vent when backward lying, avoid the dirty liquid of upper chamber to follow the dirty air current of suction easily and flow towards the passageway of airing exhaust and the circumstances of the dirty fan of suction flow direction through the passageway of airing exhaust to can reduce the impaired risk of dirty fan inflow.

Description

Surface cleaning device

Technical Field

The utility model relates to the technical field of cleaning equipment, in particular to a surface cleaning device.

Background

In order to enable the handheld surface cleaning machine to clean the ground in the low space such as the bed bottom, the sofa bottom and the cabinet bottom, the machine body of some existing handheld surface cleaning machines can rotate backwards for a large angle to a lying state relative to the ground brush, and the lying machine body can drive the ground brush to extend into the low space for cleaning. Because the sewage bucket is generally arranged on the machine body, when the sewage bucket is laid down backwards along with the machine body, the heights of structures such as the sewage suction fan, the sewage bucket, the pipe orifice of the sewage inlet pipe and the like are reduced, the height difference between the liquid level in the sewage bucket and the sewage suction fan is also greatly reduced, and under the condition that the power of the sewage suction fan is unchanged, the distance that sewage flowing into the sewage bucket from the sewage inlet pipe moves towards the sewage suction fan under the action of negative pressure suction force when laid down is greatly prolonged, and the sewage flowing into the sewage bucket can move to a position which is closer to an exhaust channel on the bucket cover. In order to enable the machine body to enter a short space, the sewage bucket is generally designed to be thinner, the included angle between the sewage bucket and the ground is smaller than 20 degrees and even is close to 0 degrees when the sewage bucket is laid down backwards along with the machine body, the liquid level in the sewage bucket and the sewage suction fan are almost at the same height, the front-back distance between the liquid level and the sewage suction fan is kept unchanged, and sewage in the bucket is closer to the inlet of an exhaust channel on the bucket cover, so that the inlet of the exhaust channel communicated with the sewage suction motor is arranged as far as possible relative to the laid sewage bucket. However, because the height difference between the inlet of the exhaust channel and the liquid level in the barrel is small, and because the dirty liquid in the barrel can shake when the user pushes and pulls the machine body back and forth, the probability that the shaky dirty liquid floods into the inlet of the exhaust channel is large, the risk of the damage of the water inflow of the dirt suction fan is high, and the stability of the working performance of the dirt suction fan is not guaranteed.

The invention patent with the application number of CN202111029127.2 and the invention of an anti-surge device of surface cleaning equipment, a recovery storage part and surface cleaning equipment discloses that the anti-surge device is arranged in the recovery storage part, a plurality of cavities are arranged in the recovery storage part, the anti-surge device comprises a first anti-surge part, and the first anti-surge part is arranged between a cavity which is provided with a gas-liquid separator in the recovery storage part to execute gas-liquid separation and a cavity for storing recovered liquid; the anti-surge device further comprises a second anti-surge part, the recovery storage part comprises a first storage part and a second storage part, a cavity provided with a gas-liquid separator for performing gas-liquid separation and a cavity for storing recovery liquid are formed in the second storage part, and the second anti-surge part is arranged between the cavity for storing recovery liquid in the first storage part and the cavity for storing recovery liquid in the second storage part. When the surface cleaning apparatus is in a lying posture, the first anti-surging portion is located below the gas-liquid separator to prevent the recovered liquid from contacting the gas-liquid separator by waves generated during the posture change of the surface cleaning apparatus. The gas-liquid separation device in the first storage part can comprise a motor and a gas-liquid separator, the motor drives the gas-liquid separator to rotate to realize gas-liquid separation, liquid is remained in the recovery storage part, and the gas is discharged after being filtered. The structure in this patent has solved the surge problem, but prevents surging the structure comparatively complicated, and complex prevents surging the structure and also has taken up more spaces of retrieving storage part, leads to retrieving the effective dirt volume of storage part less, also is unfavorable for retrieving the washing of storage part and gas-liquid separation device, in addition, because gas-liquid separation device adopts motor drive, has increased the risk that the motor was polluted by dirty liquid again, and gas-liquid separation device also can increase the cooperation degree of difficulty between retrieving storage part and the surface cleaning equipment.

In addition, there is also a structure of dividing the inner cavity of the sewage bucket into two cavities in the prior art, the upper cavity is used for containing solid dirt, the lower cavity is used for containing liquid dirt, a filter plate is arranged between the two cavities, the dirt flowing into the sewage bucket is filtered by the filter plate to enable the fixed dirt to be remained in the upper cavity, the liquid dirt flows downwards into the lower cavity, and the air flow for sucking the dirt flows upwards into the upper cavity, then flows downwards through the lower cavity and then flows to an exhaust channel communicated with the lower cavity. In this kind of structure, because exhaust passage and lower chamber direct communication, when the sewage bucket follows cleaning device's main part body and reclines, the dirt liquid in the lower chamber follows the air current flow direction exhaust passage easily, and the impaired risk of dirt suction fan feed liquor is higher like this, also is unfavorable for guaranteeing dirt suction fan's working property stability.

Disclosure of utility model

In order to solve the defects and shortcomings in the prior art, the utility model provides the surface cleaning device, which utilizes the anti-surge element to reduce the sewage liquid flowing into the upper cavity through the ventilation opening when the sewage bucket is laid down backwards along with the machine body, so that the condition that the sewage liquid in the upper cavity easily flows along with sewage suction airflow towards the exhaust channel and flows towards the sewage suction fan through the exhaust channel is avoided, the risk of damage to water inflow of the sewage suction fan can be reduced, and the stability of the working performance of the sewage suction fan is facilitated to be ensured.

In order to achieve the technical purpose, the surface cleaning device comprises a machine body and a floor brush which are connected in a pivoting manner, wherein the floor brush is provided with a sewage suction port, the machine body is provided with a detachable sewage bucket and a sewage suction fan used for providing suction force, the sewage bucket comprises a bucket body with a sewage inlet pipe and a bucket cover with an air exhaust channel, the sewage bucket is provided with a highest liquid level, sewage air flow formed by the suction force provided by the sewage suction fan flows into the sewage bucket from the sewage inlet pipe and flows out of the sewage bucket through the air exhaust channel, a partition plate higher than the highest liquid level is arranged in the sewage bucket, the inner cavity of the sewage bucket is divided into an upper cavity and a lower cavity by the partition plate, the partition plate is provided with a ventilation opening used for communicating the upper cavity and the lower cavity, an anti-surge part higher than the highest liquid level is arranged in the lower cavity, and the anti-surge part is located right below the ventilation opening.

Preferably, the anti-surge element comprises an impeller rotatably arranged below the ventilation opening, and the impeller can be driven to rotate by the dirt-absorbing airflow and can block liquid in the lower cavity from rushing to the ventilation opening.

Preferably, the rotation center line of the impeller is perpendicular to the flowing direction of the dirt sucking airflow at the ventilation opening.

Preferably, the ventilation opening extends towards the lower cavity and is provided with a ventilation cavity, and the impeller is rotatably arranged in the ventilation cavity.

Preferably, the baffle is provided with a fence which extends downwards and forms or cooperates with the baffle to form a ventilation cavity, and the impeller can be rotatably arranged on the fence and positioned at the inner periphery of the fence.

Preferably, the sewage bucket is arranged on the front side or the rear side of the machine body, and the lower part of the rear cavity wall of the ventilation cavity extends obliquely towards the front side of the sewage bucket, so that the lower end of the ventilation cavity is contracted.

Preferably, the anti-surge piece comprises an anti-surge piece which can be arranged under the ventilation opening in a floating mode, and the anti-surge piece is not lower than the highest liquid level.

Preferably, the barrel cover is provided with a water level detection part extending into the lower cavity, and the anti-surge piece can be sleeved on the water level detection part in a vertically floating mode.

Preferably, the water level detecting member is provided with an induction part at least partially lower than the highest liquid level, and the anti-surge sheet is higher than the induction part.

Preferably, the machine body has a lying state, the sewage bucket is arranged at the front side or the rear side of the machine body, the left-right width of the sewage bucket is larger than the front-rear thickness, the sewage inlet pipe is arranged close to the front side wall of the machine body so that the sewage inlet pipe is positioned at the top of the machine body when the sewage bucket follows the machine body in the lying state, and the ventilation opening is arranged at the front part of the partition plate so that the ventilation opening is positioned at the upper part of the partition plate when the sewage bucket follows the machine body in the lying state.

After the technical scheme is adopted, the utility model has the following advantages:

1. According to the surface cleaning device provided by the utility model, the inner cavity of the sewage bucket is divided into the upper cavity and the lower cavity by the partition plate, the partition plate is provided with the ventilation opening, and the anti-surge part is arranged below the ventilation opening. When the surface cleaning device works, under the action of the sewage suction fan, air in the sewage inlet pipe and the sewage bucket is sucked into the sewage suction fan through the ventilating opening and the exhaust channel on the bucket cover and is discharged from the sewage suction fan, so that negative pressure is formed in the sewage bucket, and sewage can flow into the sewage bucket from the sewage inlet pipe along with sewage suction air flow and fall into the lower cavity. When needs are to clean the ground in the low space, the sewage bucket follows the fuselage and reclines, and the dirty liquid in the lower chamber can take place to rock when the user pushes and pulls the fuselage around, and a small amount of dirty liquid that lower intracavity is rocked more violently probably through following the dirt absorbing air current and surging into the upper chamber through the vent, will prevent surging the piece setting under the vent, prevent surging the piece and have the effect of blockking to the dirty liquid of surging to the vent, can reduce surging into the dirty liquid in the upper chamber. Utilize the anti-surge piece to reduce the sewage bucket and follow the fuselage and pour into the dirty liquid of upper chamber through the vent when backward lying, avoid the dirty liquid of upper chamber to follow the dirty air current of soil pick-up and flow towards the passageway of airing exhaust and the circumstances of the dirty fan of the passageway flow direction soil pick-up of airing exhaust to can reduce the impaired risk of soil pick-up fan intaking, be favorable to guaranteeing the working property stability of soil pick-up fan, thereby be favorable to guaranteeing the soil pick-up validity of device. In addition, the scheme of the utility model is simple, a motor-driven anti-surge piece is not needed, the cost of a component can be effectively reduced, the risk of damage to liquid inlet of the motor can be eliminated, and the cleaning difficulty and the matching difficulty of a user on the sewage bucket can be reduced.

2. The anti-surge piece can adopt an impeller, the impeller can be rotationally arranged below the ventilation opening, the impeller is driven to rotate by the dirt suction airflow, and the rotating impeller can throw the dirt liquid which is rushed to the ventilation opening back into the lower cavity. The anti-surge piece is reasonably arranged in a specific structure, so that the sewage suction airflow can smoothly flow into the upper cavity through the ventilation opening and flow out of the sewage bucket from the exhaust channel, negative pressure can be smoothly formed in the sewage bucket, meanwhile, the rotation of the impeller is utilized to block the flow of a small part of sewage liquid driven by the sewage suction airflow, the blocking requirement of the anti-surge piece on the sewage liquid rushing to the ventilation opening is met, and the water inlet risk of the sewage suction fan is reduced while the sewage suction purpose is not influenced. The structure of the anti-surge piece is reasonably arranged, the blocking effect of the anti-surge piece on sewage flowing into the upper cavity from the vent is guaranteed, the power structure for driving the blades is not required to be increased, the structure of the anti-surge piece is simple, and the sewage barrel is easy to clean while the sewage barrel sewage containing space is guaranteed.

3. The rotation center line of the impeller and the flowing direction of the dirt sucking air flow at the ventilation opening are preferably arranged vertically, so that the driving effect of the dirt sucking air flow on the impeller can be guaranteed to the greatest extent, the blocking effect of the impeller on the dirt liquid can be guaranteed to the greatest extent, and the blocking effect of the impeller on the dirt liquid rushing to the ventilation opening can be improved.

4. The baffle sets up downwardly extending and forms alone or the cooperation forms the fender that encloses of ventilation chamber, and impeller rotatable frame locates to enclose and keeps off on and be located the inner periphery that encloses the fender, and the impeller is driven rotatory by the dirt absorbing air current, and rotatory impeller can block the dirty liquid that most was gushed up, even has a small amount of dirty liquid to flow at the both ends of impeller and by the impeller to get rid of to the vent, owing to set up and enclose keep off, the dirty liquid runs into and can slow down and can fall back under the dead weight effect after enclosing the fender, has further reduced the possibility that dirty liquid flowed into the upper chamber.

5. The lower part of cavity wall behind the ventilation chamber extends to the front side of sewage bucket to the slope for the lower extreme throat setting of ventilation chamber, the dirty liquid that increases the intracavity and rocks gushes into the difficulty in ventilation chamber, so can reduce the dirty liquid that gushes into the vent, in addition the impeller is to the blocking effect of the dirty liquid that gushes into the vent, the dirty liquid that the last intracavity is gushed into through the vent significantly reduces, even have a small amount of dirty liquid to get into the ventilation chamber, because the back cavity wall in ventilation chamber has decurrent water conservancy diversion effect, dirty liquid also can flow back down the intracavity along the back cavity wall in ventilation chamber, thereby further reduce the impaired risk of sewage suction fan inflow.

6. The anti-surge piece can also adopt an anti-surge piece, the anti-surge piece can be arranged under the ventilation opening in a floating mode, the anti-surge piece is not lower than the highest liquid level, and the anti-surge piece has a blocking effect on the sewage which is shoved into the ventilation opening before or when the sewage in the lower cavity reaches the highest liquid level, so that the sewage can be prevented from rushing into the lower cavity through the ventilation opening. Because the anti-surge sheet is arranged near the liquid level, the flow of the sewage suction air flow is not influenced by the anti-surge sheet, and the sewage with surge can push the anti-surge sheet to float up and down, so that part of energy of the sewage with surge can be consumed, the upward surge height and strength of the sewage are greatly reduced, and the flow probability of the sewage to the exhaust channel is reduced. When the shaking amplitude of the sewage in the lower cavity is larger, the anti-surge sheet can float along with the sewage towards the ventilation opening, the distance between the anti-surge sheet and the partition plate is reduced, the ventilation area between the lower cavity and the ventilation opening is reduced, the suction strength of the sewage suction air flow to the sewage is correspondingly reduced, and the sewage can be prevented from flowing into the upper cavity through the ventilation opening under the suction action of the sewage suction air flow. In addition, if the dirt suction fan can not stop working in time and the dirt liquid in the lower cavity exceeds the highest liquid level, the anti-surge sheet floats upwards under the buoyancy action of the dirt liquid to close the ventilation opening, so that the condition that too much dirt liquid in the lower cavity easily flows into the upper cavity through the ventilation opening is avoided. The specific structure of the anti-surge piece is reasonably arranged, and the blocking requirement of the anti-surge piece on the sewage flowing to the ventilation opening is met.

7. The anti-surge piece can be sleeved on the water level detection piece, the installation structure of the anti-surge piece is reasonably arranged, the sewage bucket does not need to be specially provided with a cylinder structure for installing the anti-surge piece, and the structure of the sewage bucket is reasonably simplified when the anti-surge piece can be vertically floated and arranged under the ventilation opening.

8. The induction part of the anti-surge piece, which is preferably higher than the water level detection piece, is arranged to ensure the blocking effect of the anti-surge piece on the sewage in the lower cavity. If the anti-surge sheet is lower than the sensing part, the sensing part is not contacted with the sewage in the lower cavity when the sewage flows through the anti-surge sheet, the anti-surge sheet can not block the sewage flowing to the vent, and the sewage easily flows into the upper cavity through the vent. The height position of the anti-surge sheet is reasonably set, so that the blocking effect of the anti-surge sheet on the sewage flowing to the ventilation opening is ensured.

9. The vent is arranged on the front side of the partition board, when the sewage bucket falls down backwards along with the machine body, the vent is arranged on the upper portion of the partition board, so that the vent is positioned at the height of the partition board as much as possible, the difficulty that sewage swaying in the lower cavity flows into the upper cavity through the vent is increased, the difficulty that sewage flows into the sewage suction fan through the upper cavity is avoided, and the stability of the working performance of the sewage suction fan is guaranteed. The front wall setting of staving is pressed close to into dirty pipe, when the fuselage backward lying is followed to the sewage bucket, advances dirty pipe and is located the top in the staving, makes into dirty pipe can be higher than the liquid level in the staving, avoids the dirty liquid that lower intracavity rocked to gush into dirty pipe and to the condition of dirt absorbing mouth backward flow.

Drawings

FIG. 1 is a schematic diagram of a surface cleaning apparatus according to an embodiment;

FIG. 2 is a block diagram of a floor brush in a surface cleaning apparatus according to an embodiment;

FIG. 3 is a block diagram of a wastewater tank in a surface cleaning apparatus according to an embodiment;

FIG. 4 is a left-right sectional view of a sewage bucket in a surface cleaning apparatus according to an embodiment;

FIG. 5 is a cross-sectional view of a wastewater treatment tank of a surface cleaning apparatus according to an embodiment taken perpendicular to the height direction;

FIG. 6 is a block diagram of a bucket cover in a surface cleaning apparatus according to one embodiment;

FIG. 7 is a front-rear sectional view of a tub cover in a surface cleaning apparatus according to an embodiment;

FIG. 8 is a partial block diagram of a bucket cover in a surface cleaning apparatus according to one embodiment;

Fig. 9 is a structural view showing a state in which a sewage bucket following body is laid down in the surface cleaning apparatus according to the first embodiment;

FIG. 10 is a cross-sectional view of a tub cover in the front-rear direction in the second surface cleaning apparatus of the embodiment;

FIG. 11 is a front-rear sectional view of a tub cover in a three-surface cleaning apparatus according to the embodiment;

FIG. 12 is a front-rear sectional view of a tub cover in a four-surface cleaning apparatus according to the embodiment;

FIG. 13 is a schematic view showing the structure of a sewage bucket in the fifth surface cleaning apparatus of the embodiment;

Fig. 14 is a schematic view showing a structure in which the sewage bucket is laid down backward in the fifth surface cleaning apparatus of the embodiment.

In the figure, 100-floor brush, 110-dirt sucking port, 120-floor brush main body, 130-front cover, 140-mounting cavity, 150-cleaning member, 160-scraping member, 170-floor scraper,

200-A machine body, 210-a handle, 220-a dirt sucking channel, 230-a contact,

300-Sewage bucket, 310-bucket body, 311-sewage inlet pipe, 320-bucket cover, 321-exhaust channel, 321 a-air inlet, 321 b-exhaust cavity, 321 c-air outlet, 322-upper cover shell, 323-lower cover shell, 324-containing cavity, 331-upper cavity, 332-lower cavity, 333-ventilation opening, 334-ventilation cavity, 340-filter, 350-exhaust hood, 360-contact piece, 371-upper sealing ring, 372-lower sealing ring, 380-anti-surge piece, 381-impeller, 382-anti-surge piece, 383-elastic piece, 390-bracket, 391-baffle, 3911-enclosure, 392-dirt shield, 393-enclosure plate,

400-A sewage suction fan,

500-A control board, wherein the control board is provided with a plurality of control boards,

610-Water purifying barrel, 620-water dividing piece,

710-Water level detecting member, 711-water level detecting electrode, 712-housing, 713-sensing part, 714-rib,

720-Water inlet detection piece, 721-water inlet detection electrode, 722-casing.

Detailed Description

The utility model will be further described with reference to the drawings and the specific examples. It is to be understood that the terms "upper," "lower," "left," "right," "longitudinal," "transverse," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are merely based on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices/elements referred to must have or be configured and operated in a particular orientation and therefore should not be construed as limiting the utility model.

Example 1

Referring to fig. 1 to 9, a surface cleaning apparatus according to a first embodiment of the present utility model includes a body 200 and a floor brush 100 pivotally connected, the floor brush 100 is provided with a soil sucking port 110, the body 200 is provided with a detachable soil bucket 300 and a soil sucking fan 400 for supplying suction force, the soil bucket 300 includes a bucket body 310 having a soil inlet pipe 311 and a bucket cover 320 having an air exhausting passage 321, the soil sucking fan 400 supplies a soil sucking air flow formed by suction force to flow from the soil inlet pipe 311 into the soil bucket 300 and flow out of the soil bucket 300 through the air exhausting passage 321, and the soil bucket 300 is provided with a maximum liquid level. The sewage bucket 300 is internally provided with a baffle 391 higher than the highest liquid level, the baffle 391 divides the inner cavity of the sewage bucket 300 into an upper cavity 331 and a lower cavity 332, the baffle 391 is provided with a vent 333 for communicating the upper cavity 331 with the lower cavity 332, the lower cavity 332 is internally provided with an anti-surge piece 380 higher than the highest liquid level, and the anti-surge piece 380 is positioned under the vent 333.

Utilize anti-surge spare 380 to reduce the dirty liquid that flows into the upper chamber 331 through vent 333 when the fuselage 200 is followed to the sewage bucket 300 and recline, avoid the dirty liquid in the upper chamber 331 to follow the circumstances that the dirt absorbing air current flows towards exhaust passage 321 and flows towards dirt absorbing fan 400 through exhaust passage 321 easily to can reduce the impaired risk of dirt absorbing fan 400 water intaking, be favorable to guaranteeing the working property stability of dirt absorbing fan 400, thereby be favorable to guaranteeing the dirt absorbing effectiveness of device.

In this embodiment, the top end of the body 200 is provided with a handle 210, and the bottom end of the body 200 is pivotally connected to the rear side of the floor brush 100. The floor brush 100 includes a floor brush main body 120 and a front cover 130 detachably mounted on the front side of the floor brush main body 120, and when the front cover 130 is fastened to the front side of the floor brush main body 120, the two are matched to form a mounting cavity 140. The cleaning member 150 driven by a motor is arranged in the mounting cavity 140, the cleaning member 150 can be of a single-roller brush structure, a double-roller brush structure which is distributed at intervals front and back, and a crawler-type mop structure with two rollers having the same outer diameter or thick front and thin back can be adopted, and the structure is not excessively limited. The surface cleaning apparatus further includes a water purifying tub 610 for supplying the cleaning member 150 with liquid, the water purifying tub 610 being detachably installed at the front side or the rear side of the main body 200, and the liquid in the water purifying tub 610 being sprayed toward the cleaning member 150 through the water dividing member 620 on the floor brush 100 by the pumping action of the pump, so that the cleaning member 150 can be wet by suction. As a preferable scheme of the present embodiment, the water diversion member 620 may adopt a structure of splitting one water inlet channel into a plurality of water outlet channels according to ^N (N is a natural number) in the prior art.

In this embodiment, the dirt absorbing port 110 is disposed on the floor brush main body 120, the dirt absorbing port 110 is disposed at the rear of the installation cavity 140 and is communicated with the installation cavity 140, a scraping member 160 for scraping the cleaning member 150 is disposed above the dirt absorbing port 110, and an elastic ground scraper 170 is disposed below the dirt absorbing port 110. A sewage suction channel 220 for communicating the sewage suction port 110 with the sewage bucket 300 is arranged between the machine body 200 and the floor brush 100, one end of the sewage suction channel 220 is communicated with the sewage suction port 110, and the other end of the sewage suction channel 220 is detachably connected with the lower end of the sewage inlet pipe 311 in a butt joint mode.

The sewage bucket 300 is detachably mounted on the main body 200, and the sewage suction fan 400 is disposed in the main body 200 above the sewage bucket 300. A control board 500 is arranged in the machine body 200, and electric elements such as the sewage suction fan 400, a motor, a pump and the like are controlled by the control board 500. As an alternative to this embodiment, the dirt suction fan 400 may also be used as a component of a suction power source assembly, where the suction power source assembly may be detachably mounted on the machine body 200, and the suction power source assembly may be further connected to a dust collection accessory for dry dust collection.

In this embodiment, the sewage tank 300 is detachably mounted on the rear side of the main body 200, and in order to reasonably control the front-rear dimension of the main body 200 such that the main body 200 lying backward can extend into a short space, the width of the sewage tank 300 in the left-right direction is greater than the thickness in the front-rear direction, the sewage tank 300 is substantially flat, and accordingly, the width of the tub cover 320 in the left-right direction is greater than the thickness in the front-rear direction. When the sewage bucket 300 is mounted on the main body 200, the main body 200 is relatively flat as a whole. It is understood that the water purifying tank 610 and the sewage tank 300 may be provided at the front side or the rear side of the main body 200 at the same time, or may be provided at both sides of the main body 200, respectively, and the water purifying tank 610 may be provided at the top of the floor brush 100.

The dirt inlet pipe 311 extends from the bottom wall of the tub body 310 toward the tub cover 320, the upper and lower ends of the dirt inlet pipe 311 are opened, and the lower end of the dirt inlet pipe 311 is communicated with the dirt suction port 110 through the dirt suction passage 220. In this embodiment, in order to prevent the sewage in the lower chamber 332 from flowing back from the sewage inlet pipe 311 to the sewage suction port 110 when the sewage bucket 300 is laid down following the main body 200, the sewage inlet pipe 311 is preferably provided at the front side in the tub body 310 and is disposed closely to the front side wall of the tub body 310 so that the upper end of the sewage inlet pipe 311 can be located at a higher position in the lower chamber 332 as much as possible when the sewage bucket 300 is laid down following the main body 200. The dirt inlet pipe 311 can be integrally formed with the barrel body 310, and the dirt inlet pipe 311 can be independently formed and then fixed in the barrel body 310.

In this embodiment, the cover 320 includes an upper cover shell 322 and a lower cover shell 323 fixed together, the upper cover shell 322 and the lower cover shell 323 cooperate to form an accommodating cavity 324 with an open top side, the sewage bucket 300 further includes a filter 340 detachably installed in the accommodating cavity 324, and the sewage suction airflow flows to the sewage suction fan 400 after being filtered by the filter 340. As a preferred solution of this embodiment, the filtering element 340 includes a filter screen and a hepa element, the filter screen is located at the bottom of the hepa element, the filter screen can perform gas-solid separation on the dirt-absorbing airflow, and the hepa element can perform gas-liquid separation on the dirt-absorbing airflow. As an alternative to the present embodiment, the cavity wall of the accommodating cavity 324 may be formed by the upper cover shell 322, may be formed by the lower cover shell 323, or may be formed by the upper cover shell 322 and the lower cover shell 323 in cooperation.

As a preferred embodiment of the present embodiment, the slop tank 300 further includes a bracket 390, the upper cover shell 322, the lower cover shell 323, and the bracket 390 are distributed from top to bottom and are fixed together, and the partition 391 is disposed on the bracket 390. The bracket 390 is provided with a dirt shield 392 which can be covered outside the upper end of the dirt inlet pipe 311 at intervals, the front side of the dirt shield 392 is opened, the upper end of the dirt shield 392 extends into the space between the baffle 391 and the lower cover 323, and the lower edge of the dirt shield 392 extends downwards to a distance beyond the bottom surface of the baffle 391. The support 390 is further provided with a shroud 393 between the lower cover shell 323 and the partition 391, the upper edge of the shroud 393 is in circumferential sealing fit with the lower cover shell 323, the lower edge of the shroud 393 is connected with the partition 391, and the rear side of the shroud 393 is provided with a avoiding opening corresponding to the buckling position on the rear side wall of the barrel 310. An upper sealing ring 371 is sleeved on the periphery of the lower cover shell 323, and a lower sealing ring 372 is sleeved on the periphery of the partition plate 391. When the barrel cover 320 covers the barrel body 310, the upper sealing ring 371 and the lower sealing ring 372 are in contact with the inner wall of the barrel body 310, the upper cavity 331 is located between the lower cover shell 323 and the partition plate 391, the lower cavity 332 is located between the partition plate 391 and the bottom wall of the barrel body 310, the upper cavity 331 and the lower cavity 332 are communicated only through the ventilation opening 333 through the upper sealing ring 371 and the lower sealing ring 372, the partition plate 391, the lower cover shell 323, the coaming 393 and the local side wall of the barrel body 310 are enclosed to form the upper cavity 331, the dirt blocking cover 392 and the front side wall of the barrel body 310 are enclosed to form a dirt blocking cavity, the upper end of the dirt inlet pipe 311 extends into the dirt blocking cavity, the upper end of the dirt blocking cover 392 extends into the upper cavity 331, and the lower end of the dirt blocking cover 392 extends into the lower cavity 332. The sewage flowing from the sewage inlet pipe 311 flows downwards into the lower cavity 332 under the drainage effect of the sewage shield 392, and the sewage flowing downwards along the sewage shield 392 can be prevented from spreading towards the ventilation opening 333 along the bottom surface of the partition 391 and flowing into the upper cavity 331 through the ventilation opening 333 because the sewage shield 392 extends downwards beyond the partition 391.

The exhaust channel 321 is arranged between the dirt shield 392 and the accommodating cavity 324 in the height direction, in particular, the lower cover shell 323 or the bracket 390 is provided with an exhaust cover 350 extending along the height direction of the sewage bucket 300, the lower edge of the exhaust cover 350 is connected with or in sealing contact with the top of the dirt shield 392, and the upper edge of the exhaust cover 350 is in circumferential sealing fit with the lower edge of the accommodating cavity 324. The exhaust channel 321 comprises an air inlet 321a and an air outlet 321c which are communicated through an exhaust cavity 321b, the exhaust cavity 321b is formed by enclosing an exhaust hood 350, the air inlet 321a is arranged on the side wall of one vertical side of the exhaust hood 350, the air outlet 321c is arranged on the top side of the exhaust hood 350, the air inlet 321a is communicated with an upper cavity 331 and an exhaust cavity 321b, and the air outlet 321c is communicated with the exhaust cavity 321b and a containing cavity 324. As a preferred embodiment of the present embodiment, the vent 333 is preferably provided at the front side of the left or right end of the partition 391 such that the vent 333 is positioned as high as possible in the partition 391 when the sewage tank 300 is laid down following the body 200. The air inlet 321a is arranged on the vertical side wall of the exhaust hood 350, which is opposite to the side of the ventilation opening 333, the ventilation opening 333 and the air inlet 321a are respectively arranged on the left side and the right side of the dirt blocking cover 392, so that the air inlet 321a and the ventilation opening 333 are respectively arranged on the left side and the right side of the barrel cover 320, the air inlet 321a and the ventilation opening 333 are arranged far away from each other as far as possible, the flow path length of the dirt absorbing air flow in the upper cavity 331 can be properly prolonged, the dirt absorbing air flow flowing through the upper cavity 331 needs to bypass the dirt blocking cover 392, and the dirt blocking cover 392 has a certain blocking effect on dirt liquid flowing along with the dirt absorbing air flow. The air discharging passage 321 is disposed as far forward as possible with respect to the upper chamber 331, and further, the air outlet 321c is disposed as far forward as possible with respect to the receiving chamber 324, so that the air discharging passage 321 can be disposed as far upward as possible when the sewage bucket 300 is laid down backward following the main body 200.

As a preferred solution of this embodiment, the extending direction of the air inlet 321a is approximately perpendicular to the extending direction of the air outlet 321c, and correspondingly, the flowing direction of the dirt-absorbing air flow at the air inlet 321a is also approximately perpendicular to the flowing direction at the air outlet 321c, so that the dirt-absorbing air flow has a larger flowing direction corner when flowing from the air inlet 321a to the air outlet 321c, and dirt liquid carried by the dirt-absorbing air flow can be thrown out by using the flowing direction corner, so that the dirt liquid is prevented from flowing to the filter 340 in the accommodating cavity 324 along with the dirt-absorbing air flow through the air exhaust channel 321.

In order to make the sewage suction fan 400 stop working in time when the sewage bucket 300 reaches the highest liquid level, the bucket cover 320 is provided with two water level detection pieces 710 extending downwards into the lower cavity 332, the two water level detection pieces 710 are distributed at intervals left and right and are respectively positioned at the outer sides of the left and right sides of the sewage blocking cover 392, and the top surface of the bucket cover 320 is provided with contact pieces 360 corresponding to the two water level detection pieces 710 at intervals. The water level detecting member 710 includes a water level detecting electrode 711 and a housing 712, the water level detecting electrode 711 is inserted into the housing 712, the lower end of the water level detecting electrode 711 extends out or partially exposes out of the housing 712 to form a sensing portion 713, the upper end of the water level detecting electrode 711 is electrically connected to the corresponding contact piece 360, and the sensing portion 713 is lower than the partition 391. The body 200 is provided with contacts 230 corresponding to the contact pieces 360, and the contacts 230 are electrically connected to the control board 500. When the sewage bucket 300 is mounted on the machine body 200, the contact piece 360 is abutted against the contact 230, and when the water level detection electrodes 711 of the two water level detection members 710 are conducted through the sewage in the lower cavity 332, it is indicated that the sewage in the sewage bucket 300 reaches the highest liquid level, and the control board 500 commands the sewage suction fan 400 to stop working according to the conducting signal of the water level detection electrodes 711. Alternatively to this embodiment, the housing 712 may be integrally formed with the upper cover 322, the lower cover 323, or the bracket 390, or the housing 712 may be separately formed and then fixed to the tub cover 320.

As a preferable aspect of the present embodiment, the anti-surge member 380 employs an impeller 381, and the impeller 381 is rotatably disposed directly under the ventilation opening 333. The impeller 381 is driven to rotate by the dirt pickup airflow, and the rotating impeller 381 can throw the dirt liquid flowing toward the air vent 333 back into the lower chamber 332. As an alternative to this embodiment, the blades on the impeller 381 may be provided in a reasonable number of one, two, three, four, etc.

In order to ensure the blocking effect of the impeller 381 on the dirty liquid to the greatest extent and also to ensure the driving effect of the dirty air suction on the impeller 381 to the greatest extent, the rotation center line of the impeller 381 is preferably arranged perpendicular to the flow direction of the dirty air suction at the air vent 333. In this embodiment, the suction airstream flows along the height direction of the wastewater tank 300 at the ventilation opening 333, and accordingly, the rotation center line of the impeller 381 shown by the straight line L in fig. 6 is perpendicular to the height direction of the wastewater tank 300.

The vent 333 extends downward to form a vent cavity 334, and the impeller 381 is rotatably disposed in the vent cavity 334. In this embodiment, the partition 391 is provided with a baffle 3911 extending downward from the outer edge of the vent 333, and the front side of the baffle 3911 is opened, so that when the lid 320 covers the tub 310, the baffle 3911 and the side wall of the tub 310 combine to form the ventilation cavity 334. The impeller 381 rotatably mounts on the enclosure 3911 through a circular shaft hole matching structure and is located on the inner periphery of the enclosure 3911, specifically, the left end and the right end of the impeller 381 are provided with circular shaft rods protruding outwards, circular shaft holes for the insertion of the circular shaft rods are formed in the side walls of the left side and the right side of the enclosure 3911, and the impeller 381 rotatably mounts in the ventilation cavity 334 through the matching of the circular shaft rods and the circular shaft holes, so that the impeller 381 can be rotatably arranged below the ventilation opening 333. Of course, the setting positions of the circular shaft lever and the circular shaft hole can be interchanged. As an alternative to the present embodiment, the enclosure 3911 may also be looped around and extend downwardly around the vent 333, in which case the vent lumen 334 is entirely enclosed by the enclosure 3911.

In order to reduce the amount of the sewage flowing into the ventilation opening 333 in the lower chamber 332, the lower portion of the rear side wall of the enclosure 3911 extends obliquely toward the front side of the sewage bucket 300, so that the lower end of the ventilation chamber 334 is provided with a reduced opening, i.e. the inner caliber of the lower end of the ventilation chamber 334 is smaller and smaller, thereby increasing the difficulty of the swaying sewage flowing into the ventilation chamber 334 in the lower chamber 332, so that the amount of the sewage flowing into the ventilation opening 333 can be reduced, and the blocking effect of the impeller 381 on the sewage flowing into the ventilation opening 333 can be greatly reduced, so that the amount of the sewage flowing into the upper chamber 331 through the ventilation opening 333 can be greatly reduced.

In use, the water purifying tank 610 and the sewage tank 300 are mounted on the body 200. When the device works, the water purifying barrel 610 supplies liquid to the cleaning member 150 through the water diversion member 620 to enable the cleaning member 150 to absorb the liquid and wet, the motor drives the cleaning member 150 to rotate to enable the cleaning member 150 to wipe the ground, the dirt sucking fan 400 provides suction force to form dirt sucking air flow which flows into the sewage barrel 300 along the dirt sucking channel 220 and the dirt inlet pipe 311, the scraping member 160 scrapes the rotating cleaning member 150, dirt scraped by the cleaning member 150 is sucked away through the dirt sucking opening 110, and the ground scraper 170 can scrape the ground when the ground brush 100 moves and the scraped dirt is sucked away through the dirt sucking opening 110. The dirt follows the dirt suction flow into the sewage bucket 300, the dirt suction flow flowing into the sewage bucket 300 from the dirt inlet pipe 311 bypasses the dirt shielding cover 392 downwards and flows into the upper cavity 331 through the vent 333, then flows in the upper cavity 331 towards the air inlet 321a by bypassing the dirt shielding cover 392, the dirt suction flow flowing into the air exhaust cavity 321b from the air inlet 321a upwards flows to the filter 340 through the air outlet 321c, and the dirt suction flow flows to the dirt suction fan 400 after being filtered by the filter 340 and finally is discharged out of the machine body 200.

Referring to fig. 9, when the sewage bucket 300 rotates backward to a lying state following the body 200, the sewage inlet pipe 311 is positioned at the top of the bucket body 310, the ventilation opening 333 is positioned at the upper portion of the partition plate 391, and the enclosure 3911 has a blocking effect on the sewage swaying in the lower chamber 332, so that the sewage swaying in the lower chamber 332 can be prevented from easily rushing into the ventilation chamber 334. The dirty liquid that rocks a small amount in the lower chamber 332 probably gushes into the ventilation chamber 334, and impeller 381 rotates under the effect of dirt absorbing air current, and rotatory impeller 381 has the barrier effect to the dirty liquid that gushes into ventilation chamber 334, can throw back the dirty liquid that gushes into ventilation chamber 334 into lower chamber 332 to can avoid the dirty liquid to gush into the upper chamber 331 through vent 333. As an alternative to this embodiment, the angle β between the body 200 and the ground may be set to a reasonable magnitude of 2 °, 5 °, 7 °, 10 ° or the like when the body 200 is reclined, and of course, the body 200 may be parallel to the ground when reclined.

When the sensing parts 713 of the two water level detection electrodes 711 are conducted through the sewage in the lower cavity 332, the control board 500 judges that the water level in the lower cavity 332 reaches the preset highest liquid level according to the conducting signal of the water level detection electrodes 711, and the control board 500 commands the sewage suction fan 400 to stop working.

As an alternative to this embodiment, the sewage bucket 300 may be detachably mounted to the front side of the main body 200, and in this case, the sewage inlet pipe 311 is disposed as far as possible in the bucket body 310, and the ventilation opening 333 is disposed as far as possible in relation to the partition 391.

As an alternative to this embodiment, in order to enable the sewage tank 300 to be stably mounted on the main body 200, a snap-fit structure is provided between the sewage tank 300 and the main body 200, and the specific structure of the snap-fit structure may refer to the prior art, which is not described herein.

As an alternative to this embodiment, the partition 391 may be separately provided, and at this time, the partition 391 may be detachably positioned and installed in the tub 310 by being engaged with the sewage inlet pipe 311 or the tub 310 to divide the inner chamber of the sewage tub 300 into the lower chamber 332 and the upper chamber 331.

As an alternative to this embodiment, the dirt shield 392 may be formed separately, the separately formed dirt shield 392 may be fixedly connected to the tub cover 320 or the bracket 390, and the separately formed dirt shield 392 may be detachably mounted in the tub body 310 by being matched with the dirt inlet pipe 311.

As an alternative of this embodiment, the partition 391 or the upper surface of the partition 391 may be inclined to be higher or lower in the left or right, and the ventilation opening 333 is provided at an inclined lower position on the upper surface of the partition 391 or the partition 391, so that the sewage flowing into the upper chamber 331 may flow back into the lower chamber 332 through the ventilation opening 333 as much as possible.

Example two

Referring to fig. 10, in the present embodiment, the anti-surge member 380 includes an anti-surge sheet 382 floatably provided directly under the ventilation opening 333, and the anti-surge sheet 382 is not lower than the highest liquid level setting. Specifically, before or when the dirty liquid in the lower cavity 332 reaches the highest liquid level, the anti-surge sheet 382 has a blocking effect on the dirty liquid flowing into the ventilation opening 333, so that the dirty liquid can be prevented from flowing into the lower cavity 332 through the ventilation opening 333. When the swing amplitude of the dirty liquid in the lower cavity 332 is larger, the anti-surge sheet 382 can float along with the dirty liquid towards the ventilation opening 333, the distance between the anti-surge sheet 382 and the partition plate 391 is reduced, the ventilation area between the lower cavity 332 and the ventilation opening 333 is reduced, the suction strength of the dirty air flow to the dirty liquid is correspondingly reduced, and the condition that the dirty liquid easily flows into the upper cavity 331 through the ventilation opening 333 under the suction action of the dirty air flow can be avoided. In addition, if the dirt suction fan 400 fails to stop working in time, and the dirt liquid in the lower cavity 332 exceeds the highest liquid level, the anti-surge sheet 382 floats upwards under the buoyancy action of the dirt liquid to close the ventilation opening 333, so that the condition that too much dirt liquid in the lower cavity 332 easily flows into the upper cavity 331 through the ventilation opening 333 is avoided. The specific structure of the anti-surge member 380 is reasonably arranged, and the blocking requirement of the anti-surge member 380 on the sewage flowing to the ventilation opening 333 is met.

As a preferable scheme of the present embodiment, the anti-surge sheet 382 is sleeved on the water level detecting member 710 so as to float up and down. Specifically, the anti-surge sheet 382 is provided with a through hole in clearance fit with the water level detecting member 710, and the anti-surge sheet 382 is sleeved on the water level detecting member 710 and is higher than the sensing portion 713 through the cooperation of the through hole and the water level detecting member 710. In order to prevent the anti-surge sheet 382 from separating from the water level detection member 710, a rib 714 is provided at the lower end of the housing 712 at the bottom of the anti-surge sheet 382, and the rib 714 vertically limits the anti-surge sheet 382. As an alternative to this embodiment, the lowest position of the anti-surge sheet 382 when the buoyancy force of the contaminated liquid is not applied may be set to be flush with the sensing portion 713.

As a preferable mode of the present embodiment, in order to enhance the closing effect of the anti-surge sheet 382 to the ventilation opening 333, the anti-surge sheet 382 is provided with an elastic sheet 383 on the side facing the partition 391.

As an alternative to the present embodiment, the anti-surge sheet 382 may be connected to the bottom of the partition 391 so as to be capable of floating up and down, or the anti-surge sheet 382 may be connected to the side wall of the tub 310 so as to be capable of floating up and down.

Other structures of the second embodiment are the same as those of the first embodiment, and will not be described in detail here.

Example III

Referring to fig. 11, in this embodiment, in order to detect the contaminated liquid in the upper cavity 331, the lid 320 is provided with a water inlet detecting member 720 extending downward into the upper cavity 331, the water inlet detecting member 720 includes a water inlet detecting electrode 721 and a casing 722, the water inlet detecting electrode 721 is inserted into the casing 722, the lower end of the water inlet detecting electrode 721 extends out of or partially exposes out of the casing 722, and the water inlet detecting electrode 721 is electrically connected to the corresponding contact piece 360.

Only one water inlet detecting member 720 may be provided, and at this time, one of the two water level detecting electrodes 711 serves as a common ground terminal, and an electric signal is generated when the water inlet detecting electrode 721 contacts the contaminated liquid in the upper chamber. The two water inlet detecting members 720 may be arranged at a left-right interval, and an electric signal is generated when the two water inlet detecting electrodes 721 touch the sewage in the upper cavity. The control board 500 judges that excessive water is fed into the upper cavity according to the electric signal of the water feeding detection electrode 721, and the control board 500 instructs the sewage suction fan 400 to stop working in time, so that more sewage in the upper cavity 331 is prevented from easily flowing to the sewage suction fan 400 along with sewage suction airflow through the air exhaust channel 321 and the filter 340.

As an alternative to the present embodiment, the anti-surge member 380 may be provided as the impeller 381 in the first embodiment or as the anti-surge sheet in the second embodiment.

Other structures of the third embodiment are the same as those of the first embodiment, and will not be described in detail here.

Example IV

Referring to fig. 12, in this embodiment, the setting of the coaming is canceled, and when the tub cover 320 covers the tub body 310, the upper cavity is formed by enclosing the lower cover 323, the partition 391 and the sidewall of the tub body.

As an alternative to this embodiment, the tub cover 320 may be provided with the water inlet detecting member 720 protruding into the upper chamber, and the tub cover 320 may not be provided with the water inlet detecting member 720 protruding into the upper chamber. When the tub cover 320 is provided with the water inlet detecting members 720, the water inlet detecting members 720 may be provided one by one or may be provided two by left and right intervals.

As an alternative to the present embodiment, the anti-surge member 380 may be provided as the impeller 381 in the first embodiment or may be provided as the anti-surge member in the second embodiment.

Other structures of the fourth embodiment are the same as those of the first embodiment, and will not be described in detail here.

Example five

Referring to fig. 13 and 14, the upper cavity 331 is disposed on top of the front side of the lower cavity 332, and the upper cavity 331 is disposed higher than a part of the lower cavity 332, that is, the upper cavity 331 and the lower cavity 332 are distributed in a mutually embedded manner. The ventilation opening 333 is provided at the left or right end of the partition 510 as far as possible in front, and when the sewage bucket 300 is laid down backward following the body, the upper chamber 331 is located at the top of the sewage bucket 300, and the ventilation opening 333 is located at the upper portion of the partition 510.

As an alternative to this embodiment, the anti-surge member 380 may be provided as the impeller in the first embodiment or may be provided as the anti-surge sheet in the second embodiment.

As an alternative to this embodiment, the inner bottom surface of the upper chamber 331 is inclined to be higher to the left or higher to the right or lower to the left, and the ventilation opening 333 is provided corresponding to the lower end of the inner bottom surface of the upper chamber 331.

In this embodiment, the two water level detecting members 710 are disposed at left and right intervals, and since the lower cavity 332 is generally in an L-shaped structure, the water level detecting members 710 can extend downward from the lid through the upper cavity 331 and then into the lower cavity 332, and the water level detecting members 710 can also extend downward from the lid into the lower cavity 332 directly without passing through the upper cavity 331. When the liquid level in the lower cavity 332 reaches the highest liquid level, the water level detection electrodes of the two water level detection pieces 710 are conducted through the sewage, the control board judges that the sewage bucket is full according to the conducting signals of the water level detection electrodes, and the control board commands the sewage suction fan to stop working, especially when the sewage bucket follows the machine body to be in a lying state, the situation that more sewage in the lower cavity 332 flows into the upper cavity 331 and then continues to move towards the exhaust channel to cause the sewage suction fan to be easy to damage the liquid inlet can be avoided.

As an alternative to this embodiment, the tub cover may be provided with the water inlet detecting member 720 extending into the upper chamber 331, and the tub cover may also cancel the water inlet detecting member 720. Most of the sewage flowing into the upper cavity 331 through the ventilation opening 333 is blocked by the blade 381 and falls back into the lower cavity 332, under the premise that the water inlet detection part 720 is arranged on the barrel cover, when the sewage flows over the anti-surge part and moves towards the exhaust channel, the sewage inlet detection electrode of the water inlet detection part 720 can detect the sewage and generate a conducting signal, the control panel commands the sewage suction fan to reduce power or stop working according to the conducting signal of the water inlet detection electrode, the strength of the sewage suction air flow is reduced, and accordingly the sewage flowing into the upper cavity 331 is prevented from continuing to move towards the exhaust channel along with the sewage suction air flow, and further the situation that the sewage inlet of the sewage suction fan is damaged due to the movement of the sewage towards the sewage suction fan is avoided.

Other structures of the fifth embodiment are the same as those of the first embodiment, and will not be described in detail here.

In addition to the above preferred embodiments, the present utility model has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the utility model, which shall fall within the scope of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a surface cleaning device, includes pivot connection's fuselage and scrubbing brush, and the scrubbing brush is equipped with the dirt absorbing mouth, and the fuselage is equipped with detachable sewage bucket and is used for providing the dirt absorbing fan of suction, and the sewage bucket is including having the staving that advances dirty pipe and having the bung of passageway of airing exhaust, and the dirt absorbing air current that dirt absorbing fan provided the suction formation flows into the sewage bucket from advancing dirty pipe and the passageway of airing exhaust and flow out the sewage bucket, and the sewage bucket is equipped with the highest liquid level, its characterized in that, be equipped with the baffle that is higher than the setting of highest liquid level in the sewage bucket, the baffle separates the inner chamber of sewage bucket into upper chamber and lower chamber, and the baffle is equipped with the vent that is used for intercommunication upper chamber and lower chamber, is equipped with the anti-surge piece that is higher than the setting of highest liquid level down, and anti-surge piece is located the vent under.

2. A surface cleaning apparatus as claimed in claim 1, wherein the anti-surge member comprises an impeller rotatably disposed below the vent, the impeller being rotated by the flow of dirt-laden air and blocking liquid in the lower chamber from flowing towards the vent.

3. A surface cleaning apparatus as claimed in claim 2, wherein the centre line of rotation of the impeller is perpendicular to the direction of flow of the dirt pick-up air flow at the vent.

4. A surface cleaning apparatus as claimed in claim 2, wherein the vent extends towards the lower chamber and defines a vent chamber, and the impeller is rotatably disposed within the vent chamber.

5. A surface cleaning apparatus as claimed in claim 4, wherein the partition is provided with a downwardly extending enclosure which alone or in combination forms the ventilation chamber, and the impeller is rotatably mounted on the enclosure and located at the inner periphery of the enclosure.

6. The surface cleaning apparatus of claim 4, wherein the sewage bucket is provided at a front side or a rear side of the main body, and a lower portion of a rear cavity wall of the ventilating cavity is inclined to extend toward the front side of the sewage bucket so that a lower end of the ventilating cavity is necked down.

7. The surface cleaning apparatus of claim 1, wherein the anti-surge member comprises an anti-surge sheet floatably disposed directly below the vent opening, the anti-surge sheet being disposed at least below the maximum liquid level.

8. The surface cleaning apparatus of claim 7, wherein the cover is provided with a water level detecting member extending into the lower chamber, and the anti-surge sheet is sleeved on the water level detecting member in a vertically floating manner.

9. A surface cleaning apparatus as claimed in claim 8, wherein the water level detecting member is provided with a sensing portion at least partially below the highest level, and the anti-surge sheet is provided above the sensing portion.

10. A surface cleaning apparatus as claimed in any one of claims 1 to 9, wherein the top surface of the partition is inclined, and the ventilation opening is arranged corresponding to the inclined lower position of the top surface of the partition; and/or the machine body is in a lying state, the sewage bucket is arranged on the front side or the rear side of the machine body, the left-right width of the sewage bucket is larger than the front-rear thickness, the sewage inlet pipe is arranged close to the front side wall of the machine body so that the sewage inlet pipe is positioned at the top of the machine body when the sewage bucket follows the machine body in the lying state, and the vent is arranged at the front part of the partition plate so that the vent is positioned at the upper part of the partition plate when the sewage bucket follows the machine body in the lying state.