CN111820817B - Dust suction device and self-cleaning method thereof - Google Patents

Abstract

The invention relates to a dust collection device and a self-cleaning method thereof, comprising a dust collection barrel and a fan, wherein the dust collection barrel comprises a barrel body and a separating piece, the barrel body is provided with an inlet and an outlet, a cyclone separation cavity is formed in the barrel body, the separating piece is arranged in the cyclone separation cavity, and the inlet is communicated with an outer cavity of the separating piece in the cyclone separation cavity; the cyclone separation device comprises a cyclone separation cavity, a connecting channel and a drawer device, wherein a water filter cavity hermetically separated from the cyclone separation cavity is formed in the barrel body, and the connecting channel is connected with two cavities; the connecting channel is provided with a conduit which extends to the bottom of the water filtering cavity, an outlet is communicated with the water filtering cavity, the outlet is formed at or extends to the top of the water filtering cavity, and a dust collection channel is formed in the dust collection barrel; the dust collector also comprises a baffle plate, and the guide pipe guides air to an impact chamber formed by the baffle plate and the inner wall of the water filtering chamber, so that the air is fully contacted with water, and small particle dust is dissolved. The internal structure of the dust collection barrel is improved, so that the original cyclone filtering structure in the dust collection barrel can be better matched with a water filtering device to filter fine particles.

Description

Dust suction device and self-cleaning method thereof

Technical Field

The invention relates to the field of cleaning tools, in particular to a dust suction device and a self-cleaning method thereof.

Background

In a cleaning tool with a fan for dust collection, an HEPA filter screen (high efficiency air filter) is often required to be arranged in front of the fan and used for filtering fine particles, fibers and the like brought out from a dust collection barrel by air, and the particles can not be thoroughly filtered through a cyclone separation structure in the dust collection barrel and can be blocked by the HEPA filter screen, so that a user needs to frequently disassemble the HEPA filter screen to clean fine particle dust attached to the HEPA filter screen, and the suction effect of the fan behind the HEPA filter screen blocked by the dust is avoided, so that the suction force of a ground brush of the cleaning tool is prevented from being reduced and the dust with heavy lifting weight can not be sucked; in order to improve the filtering effect of the dust collection barrel for filtering fine particles and fibers, a water filtering system can be additionally arranged in the dust collection barrel to replace a traditional filter screen for filtering fine particles and fibers, so that the problems that the air suction of a fan is not smooth due to excessive accumulation of fine particles and fibers on the filter screen, the suction force generated by a cleaning tool cannot suck dirt on the ground are avoided, and inconvenience in use of a user is caused due to the fact that the water filtering system and the traditional cyclone filtering system of the dust collection barrel cannot be well compatible.

Disclosure of Invention

The invention aims to solve the technical problems and provides a dust collecting device and a self-cleaning method thereof.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a dust collection device comprises a dust collection barrel and a fan, wherein the fan draws air into the dust collection barrel, the dust collection barrel comprises a barrel body and a separating piece, the barrel body is provided with an inlet and an outlet, a cyclone separation cavity is formed in the barrel body, the separating piece is installed in the cyclone separation cavity, and the inlet is communicated with an outer cavity of the separating piece in the cyclone separation cavity; the water filter is characterized by further comprising a connecting channel and a drawer device, a water filter cavity hermetically separated from the cyclone separation cavity is formed in the barrel, and one side of the connecting channel is communicated with the inner side cavity of the separation piece in the cyclone separation cavity; the other side of the connecting channel is connected with a guide pipe, the guide pipe extends to the bottom of the water filtering cavity, the outlet is communicated with the water filtering cavity, the outlet is formed at or extends to the top of the water filtering cavity, and a dust collection channel along the inlet, the cyclone separation cavity, the connecting channel, the guide pipe, the water filtering cavity and the outlet is formed in the dust collection barrel; the baffle is erected on the inner wall of the water filter cavity, a cavity with one side open is formed by surrounding the inner wall of the water filter cavity, and the tail end of the guide pipe faces towards the cavity or extends into the cavity from the tail end of the guide pipe.

According to the dust collection barrel, dust sucked by the fan enters the cyclone separation cavity for separation, larger-sized garbage can be retained in the cyclone separation cavity under the action of centrifugal force through the separating piece in the cyclone separation cavity and the weight of the garbage per se, dust with smaller size can pass through the separating piece and enter the water filter cavity for filtration, the air containing small-particle dust is sent to the bottom of the water filter cavity through the channel to be filtered by water, the two cavities are matched to fully filter the dust of particles with various sizes, the influence of the fan behind the dust collection barrel by the small-particle dust is avoided, the cyclone separation cavity is arranged in front of the water filter cavity, the large-particle garbage can be separated, thereby avoiding the need of filtering water and large-particle garbage such as large-size fiber, plastic and other materials, if the water is filtered, the water can be attached to the wall of the water filtering cavity, so that a user can difficultly clean large-particle impurities; the sucked air is guided to the bottom of the water filter cavity through the guide pipe, and the outlet of the water filter cavity is arranged at the top of the water filter cavity, so that the air can be fully contacted and mixed with the water stored at the bottom of the water filter cavity, and the water can fully dissolve and filter small particle dust in the air; and in order to ensure that the air blown out from the guide pipe can be fully mixed with the water in the water filter cavity to dissolve the small particle dust, a baffle is also arranged in the water filter cavity, the baffle is matched with a cavity formed by the inner wall of the water filter cavity in the water filter cavity, the guide pipe guides the air into the cavity to form a structure for impacting the cavity, and the air is continuously blown into the cavity through the guide pipe, so that the air and the water or the wall of the cavity are impacted with each other, and the small particle dust in the air is accelerated to be dissolved in the water.

The dust collecting device comprises a dust collecting barrel cleaning mode, when the dust collecting barrel cleaning mode is started, a cyclone separation cavity and a water filter cavity are washed by water absorbed from an inlet along a dust absorption channel, a limiting device for limiting water to flow out of an outlet is further arranged in the water filter cavity, discharging devices for discharging cleaned water are arranged in the water filter cavity and the cyclone separation cavity, and the discharging devices in the cyclone separation cavity are drawer devices; the drawer device is detachably arranged on the barrel body, extends to the lower part of the cyclone separation cavity corresponding to the separating piece from the barrel body and is used for collecting the garbage separated by the separating piece. In the air suction process, small-particle dust in the air can be attached to each wall surface of the air suction channel, users are difficult to clean some hidden positions such as the inside of a separating piece, the inside of a connecting channel and the inside of a guide pipe, and the users can possibly clean the dust collection barrel effectively only after the dust collection barrel is integrally disassembled; meanwhile, in order to avoid sucking the water for cleaning into the fan behind the dust collecting barrel, a limiting device for limiting the water flowing out from the outlet is arranged in the water filter cavity; when the dust collection barrel collects dust, the drawer device can collect large-particle garbage separated by the separating piece, and the drawer device can conveniently draw out the garbage collected by dumping from the barrel body; after the dust collecting barrel enters a cleaning dust collecting barrel mode, the drawer device can also be used as a drainage device to drain accumulated water left after cleaning in the cyclone filter chamber.

Furthermore, the outlet is an outlet pipeline which extends to the top of the water filter cavity, and a notch is formed in the corresponding top position of the outlet pipeline; the limiting device comprises a blocking block and a guide groove, wherein the blocking block floats along with the water level in the water filtering cavity, the blocking block floats along with the water level in the filtering cavity in the guide groove, and the water level lower than the notch enables the blocking block to float upwards to the position blocking the notch. Along with the increase of water sucked in the filter cavity, the blocking block floats upwards to the position for blocking the notch, so that the suction force generated by the fan is reduced or disappears, the water cannot be continuously sucked into the dust collection barrel, and the water is prevented from leaking from the notch; the guide groove limits the floating direction of the blocking block, and ensures that the blocking block can accurately float to the position of the blocking notch.

Furthermore, the opening direction of the notch is opposite to the position of the baffle, and the guide groove extends to the top of the water filtering cavity. The opening direction of the notch is optimized, so that air flows to the notch after flowing out of the impact chamber formed by the baffle, can enter the notch only by at least bypassing the outlet pipeline forming the notch and the wall forming the guide groove, and is limited by the outlet pipeline and the guide groove, so that small particle dust in the air is fully mixed with water again to be dissolved or attached to the outer walls of the outlet pipeline and the guide groove, and the up-and-down movement of the blocking block in the guide groove can not be influenced.

Still further, the staving includes bung and ladle body, be provided with the division board in the ladle body, the bung lid fits on the ladle body, and with the sealed cooperation of division board counterbalance, form whirlwind separation chamber and water filter chamber inside and outside the division board, form at least one intermediate layer in the division board, the import sets up in the intermediate layer, and the position that this import communicates whirlwind separation chamber with the inner wall tangent setting of division board. The inlet is arranged in the interlayer of the partition plate, and the wall structure of the partition plate is utilized to form the inlet, so that the space of the dust collecting barrel can be saved, and the structure of the dust collecting barrel is more compact; and in the position of import intercommunication whirlwind separation chamber, set the direction of import to the direction tangent with the inner wall in whirlwind separation chamber for the inspiratory air of import can be under the inner wall effect in whirlwind separation chamber quick formation whirlwind wind channel, make its can with the separator cooperation separates out large granule rubbish.

Still further, the outlet and the limiting device are arranged along the partition plate, the barrel body further comprises a first sealing element, the first sealing element comprises a sealing ring and a sealing plate, the sealing ring is arranged at the covering position of the barrel cover and the barrel body, and the position of the sealing plate at least covers the partition plate. The sealing structure can keep the sealing of the water filtering cavity and the cyclone separation cavity.

Still further, the connecting channel is arranged on the barrel cover, the outer wall of the connecting channel forms a handle structure, the sealing plate is provided with an opening at a position corresponding to the connecting channel in the corresponding partition plate, the separating piece is arranged on the barrel cover to clamp the sealing plate for sealing, and the position of the opening corresponds to the position of the separating piece. The handle is used as the connecting channel, so that the structure of the dust collecting barrel is more compact, and the handle can also play a role in settling dust in the air.

And furthermore, a second sealing piece is arranged on the barrel body, and the drawer device and the barrel body are kept sealed when the drawer device is arranged on the barrel body. The drawer arrangement is enabled to remain sealed during the self-cleaning process.

Still further, the drawer arrangement includes a fastener that compresses the drawer arrangement against the second seal when the drawer arrangement is mounted on the tub. The fastener provides a force for pressing the second sealing element for the drawer device, so that the drawer device and the second sealing element have better sealing effect, and further water leakage is prevented.

A self-cleaning method applying the dust suction device comprises the following steps:

water is sucked into the dust collection barrel from the inlet to flush the cyclone filter chamber and the water filter chamber;

as the water level in the water filter chamber rises, the limiting device floats upwards to the position blocking the outlet, so that the suction force generated by the fan disappears, and the inlet stops absorbing water;

and respectively opening the discharging devices of the cyclone filter chamber and the water filter chamber to discharge the water in the dust collection barrel from the dust collection barrel.

Drawings

FIG. 1 is a perspective view of a dust collection bucket of the present invention;

FIG. 2 is an exploded view of the dust collecting bucket of the present invention;

FIG. 3 is a cross-sectional view of a dust collecting tub of the present invention;

fig. 4 is a perspective view of a tub cover of the present invention;

FIG. 5 is an exploded view of the dust collecting bucket of the present invention;

FIG. 6 is a perspective view of the toilet bowl of the present invention;

FIG. 7 is a cross-sectional view of another angle of the dust collecting bucket of the present invention;

FIG. 8 is an exploded view of the dust collecting bucket of the present invention;

fig. 9 is an exploded view of the drawer arrangement of the present invention.

Detailed Description

A dust suction apparatus and a self-cleaning method thereof according to the present invention will be described with reference to FIGS. 1 to 9.

As shown in fig. 1 to 9, a dust suction device comprises a dust collecting barrel and a fan, wherein the fan draws air into the dust collecting barrel, the dust collecting barrel comprises a barrel body, a separating part 132 and a connecting channel 3, the barrel body is provided with an inlet 131 and an outlet, a cyclone separation cavity and a water filter cavity are formed in the barrel body, the separating part 132 is arranged in the cyclone separation cavity, the inlet 131 is communicated with an outer cavity of the separating part 132 in the cyclone separation cavity, and one side of the connecting channel 3 is communicated with an inner cavity of the separating part 132 in the cyclone separation cavity; the other side of connecting channel 3 is connected with pipe 31, pipe 31 extends to the bottom of water filter chamber, the export communicates with this water filter chamber, and this export is formed at or extends to the top of water filter chamber, has formed along the dust absorption passageway of import 131, whirlwind separation chamber, connecting channel 3, water filter chamber and export, when wasing the dust collection bucket, absorbs water along this dust absorption passageway by import 131 and washes whirlwind separation chamber and water filter chamber, still set up the restriction water in the water filter chamber and followed the restriction device that the export flows, all be provided with the eduction gear who is used for discharging the washing back water in water filter chamber and the whirlwind separation chamber, separator 132 includes a cylinder form screen panel, and the side of screen panel is porous structure.

The two cavities are matched to fully filter dust of particles with various sizes, so that a fan behind the dust collection barrel is prevented from being influenced by small-particle dust, the cyclone separation cavity is arranged in front of the water filter cavity, large-particle garbage can be separated, and therefore water filtration is not needed, the large-particle garbage such as large-size fibers, plastics and other materials can be attached to the wall of the water filter cavity if the large-particle garbage is filtered by water, and a user is difficult to clean large-particle impurities; the dust collection barrel can extend the dust collection channel to suck water to automatically clean the interior of the dust collection barrel, and the arrangement relation of the cavity in the dust collection barrel also prevents large-size garbage from blocking the discharge device, so that water in the cleaning water filter chamber cannot be normally discharged; meanwhile, in order to avoid sucking the water for cleaning into the fan behind the dust collecting barrel, a limiting device for limiting the water flowing out from the outlet is arranged in the water filter cavity.

As shown in fig. 2 and 3, the drainage device in the water filter chamber comprises a drainage hole 12 and a first plunger 11, an inclined surface 17 is provided on the bottom surface of the water filter chamber, opposite recesses are formed on the bottom surface by the inclined surface 17, so that water can naturally flow below the inclined surface 17, and the drainage hole 12 is provided below the inclined surface 17, so that the drainage hole 12 can better drain the water in the water filter chamber.

As shown in fig. 1 to 9, the barrel body includes a barrel cover 2 and a barrel body 1, a partition plate 13 is disposed in the barrel body 1, the barrel cover 2 covers the barrel body 1 and is in sealing fit with the partition plate 13, and a cyclone separation cavity and a water filtration cavity are formed inside and outside the partition plate 13. The outlet and the limiting device are arranged along the partition plate 13, the barrel body further comprises a first sealing element 4, the first sealing element 4 comprises a sealing ring 41 and a sealing plate 42, the sealing ring 41 is arranged at the covering position of the barrel cover 2 and the barrel body 1, and the sealing plate 42 at least covers the partition plate 13. The sealing structure can keep the sealing of the water filtering cavity and the cyclone separation cavity.

The outlet is an outlet pipeline 14, the outlet pipeline 14 extends to the top of the water filtering cavity, and a notch 141 is formed in the corresponding top position of the outlet pipeline 14; the limiting device is a blocking block 15 floating along with the water level in the water filter cavity, and the water level lower than the notch 141 enables the blocking block 15 to float upwards to the position blocking the notch 141. Along with the increase of the water sucked in the filter cavity, the blocking block 15 floats upwards to the position blocking the notch 141, so that the suction force generated by the fan is reduced or disappears, the water cannot be continuously sucked into the dust collection barrel, and the water is prevented from leaking from the notch 141. The limiting device further comprises a guide groove 151 formed on the surface opposite to the notch for the floating of the blocking block 15, and the blocking block 15 floats along with the water level in the filter cavity in the guide groove 151. The guide groove 151 limits the floating direction of the blocking block 15, and ensures that the blocking block 15 can accurately float to the position of the blocking notch 141.

As shown in fig. 7, fig. 7 is a sectional view of the dust collecting tub taken along a junction of the inlet 131 and the cyclone chamber, the shape of the junction 131a can be clearly seen, wherein the partition plate 13 includes a partition plate outer wall 134 and a partition plate inner wall 135, at least one sandwich layer is formed between the partition plate outer wall 134 and the partition plate inner wall 135, the inlet 131 is arranged in the interlayer, so that the inlet 131 does not need to be additionally provided with a pipeline, the product cost is reduced, the internal structure of the dust collecting barrel is more compact, and the communication part 131a of the inlet 131 communicated with the cyclone separation chamber is tangentially arranged with the inner wall 135 of the partition plate, and the communication portion 131a is opposite to the position of the separating member 132, the wind sucked from the inlet 131 forms a cyclone wind around the separating member 132 at the arc-shaped partition plate inner wall 135, the large particle trash is separated in the cyclone chamber by the cyclone centrifugal action in cooperation with the mesh enclosure of the separator 132.

As shown in fig. 3 and 7, the dust collecting device further comprises a baffle 19, wherein the baffle 19 is erected on the inner wall of the water filtering chamber, more specifically, in a corner formed by surrounding the outer wall 134 of the partition plate, the outlet pipe 14 and the inner part of the dust collecting barrel, a cavity with one side open is formed in the corner, and the tail end of the conduit 31 is arranged towards the cavity or the tail end of the conduit 31 extends into the cavity. The baffle 19 cooperates with the cavity formed by the inner wall of the water filter cavity in the water filter cavity, the guide pipe 31 guides air into the cavity to form a structure of impacting the cavity, and the air is continuously blown into the cavity through the guide pipe 31, so that the air and the water or the wall of the cavity are impacted mutually, and the dissolution of small particle dust in the air in the water is accelerated.

As shown in fig. 2 and 7, the opening direction of the notch 141 of the outlet pipe 14 is opposite to the position of the baffle plate 19, and the guide groove 151 extends to the top of the water filtering chamber. By optimizing the opening direction of the notch 141, when air flows out of the impact chamber formed by the baffle 19 and then flows to the notch 141, the air can enter the notch 141 by at least bypassing the outlet pipeline 14 forming the notch 141 and the wall forming the guide groove 151, and the small particle dust in the air is fully mixed with water again to be dissolved or attached to the outer walls of the outlet pipeline 14 and the guide groove 151 by the limitation of the outlet pipeline 14 and the guide groove 151, and the up-and-down movement of the blocking block 15 in the guide groove 151 cannot be influenced.

The present application also provides a more preferable solution for the position selection of the outlet pipe 14 and the guide groove 151, as shown in fig. 2, the outlet pipe 14 is disposed beside the partition plate 13, so that the outlet pipe 14 and the guide groove 151 can also cooperate with the sealing plate 42, and at least at the notch 141 where the outlet pipe 14 and the outlet pipe 14 cooperate with the guide groove 151, the sealing performance of the product is improved, so that the blocking block 15 can better block the notch 141, the suction force generated by the fan is eliminated, and the inlet 131 does not suck water.

As shown in fig. 4, in the first sealing member 4, the sealing ring 41 is provided in a shape of a multi-half ring, and a gap formed by the sealing ring 41 is matched with the sealing plate 42 to form a complete ring of sealing structure, wherein the sealing plate 42 is pressed against the tub cover 2 by the separating member 132, and the sealing ring 41 is fixed on the edge of the tub cover 2 by glue or other fixing structures.

As shown in fig. 4 and 6, the connection channel 3 is formed with a first fixing post 32 for fixing the guide tube 31 on the tub cover 2, a second fixing post 311 is disposed at a corresponding position of the guide tube 31, the guide tube 31 and the connection channel 3 are inserted into each other, and then the first fixing post 32 and the second fixing post 311 are screwed together.

A second plunger 22 and a water filling port are further arranged on the barrel cover 2 corresponding to the water filtering cavity, and the water filling port is used for filling water for filtering into the water filtering cavity.

The barrel cover 2 is further provided with a rotary fixing member 21, the rotary fixing member 21 comprises a rotary column 212, the barrel cover 2 is provided with a rotary groove 211, the rotary column 212 is inserted into the rotary groove 211 to rotate, and the rotary fixing member 21 is rotated, so that the rotary fixing member 21 rotates to the edges of the barrel cover 2 and the barrel body 1 to fix the barrel cover 2 and the barrel body 1; in order to improve the fixing effect, a fixing hole 213 is provided at the distal end of the rotation fixing member 21, and a fixing protrusion 214 that is engaged with the fixing hole 213 is provided on the edge of the tub 1 to engage with the fixing hole 213, so as to prevent the rotation fixing member 21 from falling off.

The present application further provides an embodiment in which a handle of the dust collecting bucket is used as the connection channel 3, as shown in fig. 3, the connection channel 3 is disposed on the barrel cover 2, the sealing plate 42 is provided with an opening at a position corresponding to the connection channel 3 in the corresponding partition plate 13, the separating member 132 is mounted on the barrel cover 2 corresponding to the opening, and the sealing plate 42 is clamped tightly for sealing. The barrel cover 2 is provided with a handle, and the inside of the handle is hollow to form the connecting channel 3. The handle is generally arranged above the barrel cover 2, the structure of the dust collecting barrel can be more compact by using the handle as the connecting channel 3, and the shape of the handle is generally arranged to be arched, so that the connecting channel 3 is also arched, and the upward arched part can play a role of settling dust in air.

As shown in fig. 8 and 9, the discharging device in the cyclone chamber is a drawer device 16, the drawer device 16 is detachably mounted on the barrel, and the drawer device 16 is located below the cyclone chamber corresponding to the separating member 132 and is used for collecting the substances separated by the separating member 132. When the drawer device 16 is used for dust collection, the dust separated by the separating member 132 in the cyclone separator is collected, and the drawer device 16 is detached from the tub, so that the collected dust can be conveniently treated; during the self-cleaning process, the drawer arrangement 16 can be removed and the water in the cyclonic separator can be drained. The barrel body is provided with a second sealing element 18, and the drawer device 16 is sealed with the barrel body when the drawer device 16 is arranged on the barrel body. Enabling the drawer arrangement 16 to remain sealed during self-cleaning.

As shown in fig. 9, the drawer device 16 includes a fastener 162, the partition plate 13 is provided with a fastener groove 133, the fastener groove 133 cooperates with the fastener 162 to fix the drawer device 16, and the fastener 162 presses the drawer device 16 against the second sealing member 18 when the drawer device 16 is mounted on the tub. The fastener 162 provides a force to the drawer arrangement 16 to compress the second seal 18, which results in a better seal between the drawer arrangement 16 and the second seal 18, further preventing water leakage.

The drawer device 16 further includes a panel 163 and a cup 161, the cup 161 is used for receiving and storing garbage, a third fixing post 161b for mounting the panel 163 is disposed on one side of the cup 161, a fourth fixing post 163b is disposed on the panel 163 to be matched with the panel 163, so that the panel 163 is fixed on the cup 161 by a screw, a cavity for mounting the fastening member 162 is formed between the panel 163 and the cup 161, a first extending hole 163c is disposed on the panel 163, the fastening member 162 has an ear 162c extending from the first extending hole 163c to the panel 163, the ear 162c is convenient for a user to operate the fastening member 162, a second extending hole 163a is further disposed on the panel 163, the fastening member 162 has a fastening projection 162b extending from the second extending hole 163a to the panel 163, and the fastening projection 162b is convenient to be matched with the fastening groove 133.

The cup body 161 is provided with an abutting block 161a for abutting against the spring, the other side of the spring abuts against the fastener 162, the fastener 162 is provided with a limiting column 162a, and the spring is sleeved on the limiting column 162a so as to avoid the position of the spring from deviating; the snap tab 162b snaps into the snap groove 133 such that the sealing surface 163d on the panel 163 can press against the second seal 18 to form a mating seal.

A self-cleaning method applying the dust suction device comprises the following steps:

water is sucked into the dust collection barrel from the inlet to flush the cyclone filter chamber and the water filter chamber;

as the water level in the water filter chamber rises, the limiting device floats upwards to the position blocking the outlet, so that the suction force generated by the fan disappears, and the inlet stops absorbing water;

and respectively opening the discharging devices of the cyclone filter chamber and the water filter chamber to discharge the water in the dust collection barrel from the dust collection barrel.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (7)

1. A dust collection device comprises a dust collection barrel and a fan, wherein the fan draws air into the dust collection barrel, the dust collection barrel comprises a barrel body and a separating piece, the barrel body is provided with an inlet and an outlet, a cyclone separation cavity is formed in the barrel body, the separating piece is installed in the cyclone separation cavity, and the inlet is communicated with an outer cavity of the separating piece in the cyclone separation cavity; the water filter is characterized by further comprising a connecting channel and a drawer device, a water filter cavity hermetically separated from the cyclone separation cavity is formed in the barrel, and one side of the connecting channel is communicated with the inner side cavity of the separation piece in the cyclone separation cavity; the other side of the connecting channel is connected with a guide pipe, the guide pipe extends to the bottom of the water filtering cavity, the outlet is communicated with the water filtering cavity, the outlet is formed at or extends to the top of the water filtering cavity, and a dust collection channel along the inlet, the cyclone separation cavity, the connecting channel, the guide pipe, the water filtering cavity and the outlet is formed in the dust collection barrel; the baffle is erected on the inner wall of the water filtering cavity, a cavity with one open side is formed by the baffle and the inner wall of the water filtering cavity in an enclosing mode, and the tail end of the guide pipe faces the cavity or extends into the cavity;

the dust collecting device also comprises a dust collecting barrel cleaning mode, when the dust collecting barrel cleaning mode is started, water is absorbed from an inlet along the dust absorption channel to wash the cyclone separation cavity and the water filter cavity, a limiting device for limiting water to flow out from the outlet is further arranged in the water filter cavity, discharging devices for discharging cleaned water are arranged in the water filter cavity and the cyclone separation cavity, the discharging devices in the cyclone separation cavity are drawer devices, and the drawer devices are arranged in a sealing mode; the drawer device is detachably arranged on the barrel body, extends from the barrel body to the position, corresponding to the lower part of the separating piece, in the cyclone separation cavity and is used for collecting the garbage separated by the separating piece;

the barrel body comprises a barrel cover and a barrel body, a partition plate is arranged in the barrel body, the barrel cover covers the barrel body and is abutted against the partition plate in a sealing fit mode, the cyclone separation cavity and the water filter cavity are formed inside and outside the partition plate, the outlet and the limiting device are arranged along the partition plate, the barrel body further comprises a first sealing element, the first sealing element comprises a sealing ring and a sealing plate, the sealing ring is arranged at the covering position of the barrel cover and the barrel body, and the position of the sealing plate at least covers the partition plate;

the outlet is an outlet pipeline which extends to the top of the water filter cavity, and the outlet pipeline is provided with a notch at the corresponding top position; the limiting device comprises a blocking block and a guide groove, wherein the blocking block floats along with the water level in the water filtering cavity, the blocking block floats along with the water level in the filtering cavity in the guide groove, and the blocking block floats to the position for blocking the notch due to the water level lower than the notch;

the baffle is erected on the inner wall of the water filtering cavity, the baffle is erected in a corner formed by surrounding the outer wall of the partition plate, the outlet pipeline and the interior of the dust collecting barrel, a cavity with one side opened is formed in the corner, and the tail end of the guide pipe is arranged towards the cavity or extends into the cavity;

the opening direction of the notch of the outlet pipeline is opposite to the position of the baffle, and the guide groove extends to the top of the water filter cavity; when air flows out of the impact chamber formed by the baffle plate and flows to the notch, the air can enter the notch only by at least bypassing the outlet pipeline forming the notch and the wall forming the guide groove;

the outlet pipeline and the notch arranged beside the partition plate enable the outlet pipeline and the guide groove to be matched with the sealing plate, and at least the outlet pipeline and the notch where the outlet pipeline and the guide groove are matched can be matched with the sealing plate.

2. The vacuum cleaner of claim 1, wherein the notch is formed in a direction opposite to the position of the baffle, and the guide slot extends to the top of the water filter chamber.

3. The suction cleaner of claim 1, wherein the divider plate has at least one plenum formed therein, the inlet being positioned in the plenum and communicating with the cyclonic separation chamber at a location tangential to an inner wall of the divider plate.

4. The suction device as claimed in claim 1, wherein the connection passage is provided on the tub cover, an outer wall of the connection passage forms a handle structure, the sealing plate is provided with an opening at a position corresponding to the connection passage in the partition plate, and the separating member is mounted on the tub cover to clamp the sealing plate to be sealed, such that the opening is positioned corresponding to the separating member.

5. The vacuum cleaner of claim 1, wherein the tub has a second seal thereon, and the drawer assembly is mounted on the tub such that the drawer assembly remains sealed to the tub.

6. The suction device of claim 5, wherein the drawer arrangement includes a snap fit that compresses the drawer arrangement against the second seal when the drawer arrangement is mounted to the tub.

7. A self-cleaning method using the dust suction apparatus as claimed in any one of claims 1 to 6, comprising the steps of:

water is sucked into the dust collection barrel from the inlet to flush the cyclone filter chamber and the water filter chamber;

as the water level in the water filter chamber rises, the limiting device floats upwards to the position blocking the outlet, so that the suction force generated by the fan disappears, and the inlet stops absorbing water;

and respectively opening the discharging devices of the cyclone filter chamber and the water filter chamber to discharge the water in the dust collection barrel from the dust collection barrel.

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