CN217367320U

CN217367320U - Filter with self-cleaning function

Info

Publication number: CN217367320U
Application number: CN202221446452.9U
Authority: CN
Inventors: 张法法
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-06
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses a filter with self-cleaning function, including last casing, lower casing, filter screen and self-cleaning device, the bottom and the lower casing top of going up the casing are connected, and the filter screen setting is equipped with out the liquid end pipe between last casing and lower casing on going up the casing, is equipped with the feed liquor end pipe on the casing down, and the one end of feed liquor end pipe extends to in the lower casing. The technical effects achieved are as follows: after the liquid inlet end pipe is communicated with the liquid inlet pipe network, liquid to be filtered in the liquid inlet pipe network enters the water spray pipe from the liquid inlet end pipe and then is sprayed out from the first liquid outlet hole and the second liquid outlet hole to drive the water spray pipe to continuously rotate, and the liquid enters the upper shell to be discharged from the liquid outlet end pipe after being filtered by the filter screen; after the filter operates for a period of time, the sewage outlet is opened, and then impurities and sewage in the lower shell can be discharged.

Description

Filter with self-cleaning function

Technical Field

The utility model relates to a filter technical field, concretely relates to filter with self-cleaning function.

Background

At present, after a common filter in the market is used for a period of time, the flow is influenced due to the increase of impurities on the surface of a filter disc, and the impurities can be removed only by dismantling the filter disc and repeatedly washing, so that the time and the labor are wasted, and the efficiency is low; moreover, if the filter disc is not detached and washed manually in time, the filter disc is easy to block, and a filtering system is ineffective; if the disposable filtering material is used, the resource waste is also caused; in addition, some filters that use an electrically driven cleaning device to clean the filter disc also have additional energy consumption, complex structure and high manufacturing cost.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a filter with self-cleaning function to solve the filter among the prior art and lead to blockking up when not timely washing filter element because of artifical unpicking and influencing the flow, and artifical unpicking and washing filter element wastes time and energy, and use disposable filtering material to cause the wasting of resources, perhaps use the clean filter element device of electric drive to cause the extravagant problem of the energy.

In order to achieve the above object, the present invention provides the following technical solutions:

according to the first aspect of the utility model, a filter with an automatic cleaning function comprises an upper shell, a lower shell, a filter screen and an automatic cleaning device, wherein the bottom of the upper shell is connected with the top of the lower shell, the filter screen is arranged between the upper shell and the lower shell, a liquid outlet pipe is arranged on the upper shell, a liquid inlet pipe is arranged on the lower shell, and one end of the liquid inlet pipe extends into the lower shell;

the automatic cleaning device comprises a connector and a water spraying pipe, wherein the connector is arranged at the middle part of the water spraying pipe, the two ends of the water spraying pipe are closed, the axis of the water spraying pipe is parallel to the filter screen, the pipe wall of the water spraying pipe is provided with a first liquid outlet hole and a second liquid outlet hole, the first liquid outlet hole and the second liquid outlet hole are respectively positioned at the two sides of the axis of the connector, the opening orientation of the first liquid outlet hole is opposite to that of the second liquid outlet hole, the pipe wall of the water spraying pipe is provided with a plurality of groups of bristles along the axial direction, the top ends of the bristles are contacted with the filter screen, the connector is positioned through a rotating shaft and is connected with one end in the lower shell in a rotating manner, and the bottom of the lower shell is provided with a sewage discharge outlet.

Furthermore, the toothbrush further comprises a third liquid outlet hole and a fourth liquid outlet hole, wherein the third liquid outlet hole and the fourth liquid outlet hole are arranged on the side wall of the water spraying pipe, the third liquid outlet hole and the fourth liquid outlet hole are respectively positioned on two sides of the bristles, the third liquid outlet hole is positioned above the first liquid outlet hole in an inclined mode, and the fourth liquid outlet hole is positioned above the second liquid outlet hole in an inclined mode.

Further, the improved rotary drum further comprises a first slope and a second slope, wherein the first slope is in an inverted funnel shape, the first slope is arranged in the lower shell, and the first slope is located below the rotary shaft; the second slope is annularly arranged at the edge of the bottom in the lower shell, the top end of the second slope is connected with the side wall of the lower shell, and the bottom end of the second slope is connected with the bottom of the lower shell.

Further, the bottom of going up the casing is equipped with the retaining ring, the top of casing is equipped with the clamping ring down, the filter screen passes through the retaining ring with the clamping ring compresses tightly fixedly.

Further, still include first check valve, first check valve sets up on the feed end pipe.

The liquid outlet pipe is arranged in the liquid outlet pipe, the liquid outlet pipe is arranged in the liquid outlet pipe, and is arranged in the liquid outlet pipe.

Further, the buoyancy switch comprises a shell and a floater, the shell is installed on the inner wall of the upper shell, a through hole is formed in the bottom of the shell, an air inlet and outlet is formed in the side wall of the shell, and the floater is arranged in the shell in a sliding mode.

Further, still include the mounting, go up the casing with lower casing passes through the mounting detachable connects.

Furthermore, the fixing piece comprises a plurality of hasps which are annularly arranged along the outer side walls of the upper shell and the lower shell respectively, hooks of the hasps are arranged on the outer side wall of the upper shell, and a buckle ring assembly of the hasps is arranged on the outer side wall of the lower shell.

Further, the bristles are made of steel.

The utility model has the advantages of as follows: the pipe wall of the spray pipe is provided with a first liquid outlet hole and a second liquid outlet hole, the first liquid outlet hole and the second liquid outlet hole are respectively positioned at two sides of the axis of the connector, the opening direction of the first liquid outlet hole is opposite to the opening direction of the second liquid outlet hole, the pipe wall of the spray pipe is provided with a plurality of groups of bristles along the axial direction of the pipe wall, the top ends of the bristles are contacted with the filter screen, the connector is rotatably connected with one end of the liquid inlet end pipe positioned in the lower shell through a rotating shaft, after the liquid inlet end pipe is communicated with the liquid inlet pipe network, the liquid to be filtered in the liquid inlet pipe network enters the spray pipe through the liquid inlet end pipe and then is sprayed out from the first liquid outlet hole and the second liquid outlet hole, the spray pipe is driven to continuously rotate along the axis of the rotating shaft and then enters the upper shell to be discharged from the liquid outlet end pipe after being filtered by the filter screen, the spray pipe drives the bristles to continuously brush the filter screen when rotating, the continuous automatic cleaning of the filter screen can be realized, the automatic cleaning device is driven by the power of the liquid to be filtered, the energy is saved and the environment is protected; the bottom of lower casing is equipped with the drain, and the drain is opened to the filter operation after a period, can be with the internal impurity of inferior valve and sewage discharge.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a cross-sectional view of a filter with an automatic cleaning function according to some embodiments of the present invention.

Fig. 2 is a partially enlarged view of fig. 1 at a.

Fig. 3 is a perspective view of an automatic cleaning device of a filter with an automatic cleaning function according to some embodiments of the present invention from a first viewing angle.

Fig. 4 is a perspective view of an automatic cleaning device of a filter with an automatic cleaning function according to some embodiments of the present invention from a second viewing angle.

Fig. 5 is a front view of an automatic cleaning device for a filter with an automatic cleaning function according to some embodiments of the present invention.

Fig. 6 is a back view of an automatic cleaning device for a filter with an automatic cleaning function according to some embodiments of the present invention.

In the figure: 1. the automatic cleaning device comprises an upper shell, 2, a lower shell, 3, a liquid inlet end pipe, 4, a liquid outlet end pipe, 5, a sewage draining outlet, 6, an air flow channel, 7, a buoyancy switch, 8, a filter screen, 9, an automatic cleaning device, 10, bristles, 11, a first liquid outlet hole, 12, a second liquid outlet hole, 13, a pressing ring, 14, a check ring, 15, a fixing piece, 16, a first slope, 17, a second slope, 18, a rotating shaft, 19, a first check valve, 20, a second check valve, 21, a connector, 22, a water spraying pipe, 23, a third liquid outlet hole, 24, a fourth liquid outlet hole, 25, a shell, 26, a floater, 27, a through hole, 28 and an air inlet and outlet.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 6, in an embodiment of the first aspect of the present invention, the filter with an automatic cleaning function includes an upper casing 1, a lower casing 2, a filter screen 8 and an automatic cleaning device 9, a bottom of the upper casing 1 is connected to a top of the lower casing 2, the filter screen 8 is disposed between the upper casing 1 and the lower casing 2, the upper casing 1 is provided with a liquid outlet pipe 4, the lower casing 2 is provided with a liquid inlet pipe 3, and one end of the liquid inlet pipe 3 extends into the lower casing 2;

automatic cleaning device 9 includes connector 21 and spray pipe 22, connector 21 sets up the middle part at spray pipe 22, spray pipe 22's both ends are confined, spray pipe 22's axis is on a parallel with filter screen 8, spray pipe 22's pipe wall is equipped with first drain hole 11 and second drain hole 12, first drain hole 11 and second drain hole 12 are located the both sides of connector 21 axis respectively, the opening orientation of first drain hole 11 is opposite with the opening orientation of second drain hole 12, spray pipe 22's pipe wall is equipped with multiunit brush hair 10 along its axial, the top and the filter screen 8 contact of brush hair 10, connector 21 is connected through the one end rotation that pivot 18 and inlet end pipe 3 are located casing 2 down, the bottom of casing 2 is equipped with drain 5 down.

In the above embodiment, it should be noted that the brush staples 10 are disposed on the top of the water spray pipe 22, and the upper housing 1 and the lower housing 2 are detachably connected.

Furthermore, pressure difference sensors can be installed on two sides of the filter screen 8, or flow sensors are respectively installed in the liquid inlet end pipe 3 and the liquid outlet end pipe 4, the electromagnetic valve is installed on the sewage outlet 5, the opening and closing of the electromagnetic valve are controlled through the pressure difference or the flow difference, unattended automatic sewage discharge can be achieved, dependence on manpower is eliminated, and production efficiency is improved.

The technical effects achieved by the above embodiment are as follows: after the liquid inlet end pipe 3 is communicated with a liquid inlet pipe network, liquid to be filtered in the liquid inlet pipe network enters the water spraying pipe 22 through the liquid inlet end pipe 3 and then is sprayed out from the first liquid outlet hole 11 and the second liquid outlet hole 12, the water spraying pipe 22 is driven to continuously rotate along the axis of the rotating shaft 18 and is filtered by the filter screen 8 and then enters the upper shell 1 to be discharged from the liquid outlet end pipe 4, the brush bristles 10 are driven to continuously brush the filter screen 8 when the water spraying pipe 22 rotates, so that filtered impurities cannot be fixedly attached to the filter screen 8, continuous automatic cleaning of the filter screen 8 can be realized, and the automatic cleaning device 9 is driven by power of the liquid to be filtered, so that the energy is saved and the environment is protected; the bottom of the lower shell 2 is provided with a sewage outlet 5, and the sewage outlet 5 is opened after the filter operates for a period of time, so that impurities and sewage in the lower shell 2 can be discharged.

Optionally, as shown in fig. 1 to 6, in some embodiments, a third liquid outlet hole 23 and a fourth liquid outlet hole 24 are further included, the third liquid outlet hole 23 and the fourth liquid outlet hole 24 are both disposed on the side wall of the water spraying pipe 22, the third liquid outlet hole 23 and the fourth liquid outlet hole 24 are respectively located on two sides of the bristle 10, the third liquid outlet hole 23 is located obliquely above the first liquid outlet hole 11, and the fourth liquid outlet hole 24 is located obliquely above the second liquid outlet hole 12.

In the above optional embodiments, it should be noted that the first liquid outlet hole 11 and the second liquid outlet hole 12 have the same size, the third liquid outlet hole 23 and the fourth liquid outlet hole 24 have the same size, and the third liquid outlet hole 23 is smaller than the first liquid outlet hole 11; the first liquid outlet 11 and the second liquid outlet 12 are respectively arranged on the side wall of the spray pipe 22 near two ends, the opening directions of the first liquid outlet 11 and the second liquid outlet 12 are distributed towards two radial ends of the spray pipe 22, and the opening directions of the third liquid outlet 22 and the fourth liquid outlet 23 are respectively towards the oblique upper part of the spray pipe 22.

Furthermore, the number of the third liquid outlet holes 23 and the number of the fourth liquid outlet holes 24 are multiple, the multiple third liquid outlet holes 23 are respectively arranged along one end of the spray pipe 22 to the middle of the spray pipe 22 at equal intervals, and the multiple fourth liquid outlet holes 24 are respectively arranged along the other end of the spray pipe 22 to the middle of the spray pipe 22 at equal intervals.

The beneficial effects of the above alternative embodiment are: through setting up third play liquid hole 23 and fourth play liquid hole 24, can the continuous rotation of auxiliary drive spray pipe 22 to third play liquid hole 23 and fourth play liquid hole 24 spun liquid can constantly erode filter screen 8, thereby further guarantee the clearance effect to filter screen 8.

Optionally, as shown in fig. 1 to 6, in some embodiments, the device further includes a first slope 16 and a second slope 17, the first slope 16 is in an inverted funnel shape, the first slope 16 is disposed in the lower housing 2, and the first slope 16 is located below the rotating shaft 18; the edge of the bottom in casing 2 is down gone up to second slope 17 annular setting, and the top and the lateral wall of casing 2 are down connected to the top of second slope 17, and the bottom of casing 2 are down connected to the bottom of second slope 17.

In the above optional embodiment, it should be noted that the top of the first slope 16 is connected to the outer side wall of the liquid inlet pipe 3, the second slope 17 is annular, the diameter of the bottom end of the second slope 17 is smaller than that of the top end, the second slope 17 forms an included angle of 45 ° with the side wall and the bottom of the lower housing 2, an impurity deposition chamber is formed between the first slope 16 and the second slope 17, and during the operation of the filter, the fluidity of the liquid in the deposition chamber is small, so that the filtered impurities are deposited at the bottom of the lower housing.

The beneficial effects of the above alternative embodiment are: the first slope 16 and the second slope 17 are used in cooperation with each other to facilitate the deposition of impurities on the bottom of the lower housing to discharge them from the soil discharge opening 5.

Alternatively, as shown in fig. 1 to 6, in some embodiments, the bottom of the upper casing 1 is provided with a retaining ring 14, the top of the lower casing 2 is provided with a pressing ring 13, and the filter screen 8 is fixed by the retaining ring 14 and the pressing ring 13.

In the above optional embodiment, it should be noted that the retainer ring 14 is provided with a support net, so that a better support effect can be formed on the filter screen 8, and the filter screen 8 is prevented from deforming in the use process; and sealing rings are respectively arranged at the joints of the two sides of the filter screen 8 and the retainer ring 14 and the pressing ring 13.

The beneficial effects of the above alternative embodiment are: through setting up retaining ring 14 and clamping ring 13, combine the sealing washer use can be more convenient inseparable fixed filter screen 8.

Optionally, as shown in fig. 1 to 6, in some embodiments, a first check valve 19 is further included, and the first check valve 19 is disposed on the liquid inlet end pipe 3.

In the above optional embodiment, it should be noted that the liquid level control device further includes a second check valve 20 and a buoyancy switch 7, the second check valve 20 is disposed on the liquid outlet end pipe 4, the top of the upper housing 1 is provided with an air flow channel 6, the buoyancy switch 7 is disposed in the upper housing 1, and the buoyancy switch 7 is located below the air flow channel 6.

Further, the buoyancy switch 7 comprises a shell 25 and a float 26, wherein the shell 25 is mounted on the inner wall of the upper shell 1, a through hole 27 is formed at the bottom of the shell 25, an air inlet and outlet 28 is formed on the side wall of the shell, and the float 26 is slidably arranged in the shell 25.

Further, as shown in fig. 1, taking water filtration as an example, in the operation process of the filter, after the water to be filtered flows into the spray pipe 9 through the liquid inlet end pipe 3 and the rotating shaft 18, the water to be filtered is ejected out through the first liquid outlet hole 11 and the second liquid outlet hole 12 at the two ends and the third liquid outlet hole 23 and the fourth liquid outlet hole 24 at the top, and under the action of the recoil force of the first liquid outlet hole 11 and the second liquid outlet hole 12 in the horizontal direction and the recoil force of the third liquid outlet hole 23 and the fourth liquid outlet hole 24 in the horizontal direction, the spray pipe 22 rotates, so as to drive the bristles 10 at the top of the spray pipe 22 to rotate; under the combined action of the brushing of the bristles 10, the impact of the third liquid outlet hole 23 and the fourth liquid outlet hole 24 and the rotating water flow caused by the rotation of the water spray pipe 22, impurities on one side of the bottom surface of the filter screen 8 cannot be fixedly attached to the filter screen 8, so that the aims of cleaning the filter screen 8 and maintaining the flow rate are fulfilled; as the content of impurities in the water in the lower housing 2 is higher, the cleaning effect of the water spray pipe 22 and the impact water flow on the bottom surface of the filter screen 8 is gradually reduced, the water pressure in the lower housing 2 is gradually increased, and the rotation speed of the water spray pipe 22 is also gradually reduced; at this moment, can open bottom drain 5, sewage flows out from casing 2 bottom down, has following three kinds of circumstances this moment: 1. if the water flow of the liquid inlet end pipe 3 is closed, the first check valve 19 and the second check valve 20 are opened to prevent backflow, water on the upper portion of the filter screen 8 flows downwards to reversely flush the filter screen 8, the water level in the upper shell 1 is lowered to trigger the top buoyancy switch 7 to be opened, the interior of the upper shell 1 is communicated with the atmosphere, and the backwashing force can be increased; 2. if the water flow of the liquid inlet end pipe 3 is not closed and the opening of the sewage discharge port 5 is large (the sewage discharge flow is larger than the water inlet flow), the water spray pipe 22 can also rotate to drive the brush bristles 10 to synchronously clean the filter screen 8 while the back washing effect in the first condition is realized; 3. if the water flow of the liquid inlet end pipe 3 is not closed, the opening of the sewage discharge port 5 is small (the sewage discharge flow is smaller than the water inlet flow), the original filtering water flow can still be maintained (the flow is reduced), and the water spray pipe 22 can also rotate to drive the brush hair 10 to clean the filter screen 8 at the moment. Finally, after the filter screen 8 is cleaned, the sewage outlet 5 is closed, water flows in through the liquid inlet end pipe 3, the water spraying pipe 22 continues to rotate, if residual air exists in the upper shell 1, the residual air can be discharged through an opening of the top buoyancy switch 7 until the water level rises to the top of the upper shell 1 to trigger the buoyancy switch 7 to be closed, and water flows out from the liquid outlet end pipe 4.

Optionally, as shown in fig. 1 to 6, in some embodiments, a fixing member 15 is further included, and the upper casing 1 and the lower casing 2 are detachably connected by the fixing member 15.

In the above-mentioned alternative embodiment, it should be noted that the fixing member 15 includes a plurality of buckles, the plurality of buckles are respectively and annularly disposed along the outer side walls of the upper housing 1 and the lower housing 2, the hooks of the buckles are disposed on the outer side wall of the upper housing 1, the buckle assemblies of the buckles are disposed on the outer side wall of the lower housing 2, the hooks of each buckle and the buckle assemblies are disposed in one-to-one correspondence, and the specific structure of the buckle is the prior art, so that a description thereof is omitted.

The beneficial effects of the above alternative embodiment are: the fixing member 15 includes a plurality of hasps, and can conveniently realize the close connection of the upper case 1 and the lower case 2, and the installation is convenient and fast to detach simultaneously.

Alternatively, as shown in fig. 1 to 6, in some embodiments, the bristles 10 are steel bristles 10.

In the alternative embodiments described above, it should be noted that the bristles 10 can also be made from synthetic fibers (e.g., nylon, PP, PBT, PET, PVC, etc.) or natural materials (e.g., hog bristles, horse hair, wool, white palm, etc.).

The beneficial effects of the above alternative embodiment are: the bristles 10 are made of steel bristles 10, so that the toothbrush is more firm and durable.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

Claims

1. The filter with the automatic cleaning function is characterized by comprising an upper shell (1), a lower shell (2), a filter screen (8) and an automatic cleaning device (9), wherein the bottom of the upper shell (1) is connected with the top of the lower shell (2), the filter screen (8) is arranged between the upper shell (1) and the lower shell (2), a liquid outlet end pipe (4) is arranged on the upper shell (1), a liquid inlet end pipe (3) is arranged on the lower shell (2), and one end of the liquid inlet end pipe (3) extends into the lower shell (2);

the automatic cleaning device (9) comprises a connector (21) and a water spraying pipe (22), the connector (21) is arranged at the middle part of the water spraying pipe (22), the two ends of the water spraying pipe (22) are closed, the axis of the water spraying pipe (22) is parallel to the filter screen (8), the pipe wall of the water spraying pipe (22) is provided with a first liquid outlet hole (11) and a second liquid outlet hole (12), the first liquid outlet hole (11) and the second liquid outlet hole (12) are respectively positioned at the two sides of the axis of the connector (21), the opening orientation of the first liquid outlet hole (11) is opposite to the opening orientation of the second liquid outlet hole (12), the pipe wall of the water spraying pipe (22) is provided with a plurality of groups of bristles (10) along the axial direction, the top ends of the bristles (10) are contacted with the filter screen (8), the connector (21) is connected with the liquid inlet end pipe (3) through a rotating shaft (18) in a manner that one end in the lower shell (2) is rotatably connected, and a sewage draining outlet (5) is formed in the bottom of the lower shell (2).

2. A filter with self-cleaning function as claimed in claim 1, further comprising a third liquid outlet hole (23) and a fourth liquid outlet hole (24), wherein the third liquid outlet hole (23) and the fourth liquid outlet hole (24) are both disposed on the side wall of the water spray pipe (22), the third liquid outlet hole (23) and the fourth liquid outlet hole (24) are respectively located at two sides of the bristles (10), the third liquid outlet hole (23) is located obliquely above the first liquid outlet hole (11), and the fourth liquid outlet hole (24) is located obliquely above the second liquid outlet hole (12).

3. The filter with automatic cleaning function according to claim 1, further comprising a first slope (16) and a second slope (17), wherein the first slope (16) is in an inverted funnel shape, the first slope (16) is arranged in the lower housing (2), and the first slope (16) is positioned below the rotating shaft (18); the edge of bottom in second slope (17) annular setting is in casing (2) down, the top of second slope (17) with the lateral wall of casing (2) is connected down, the bottom of second slope (17) with the bottom of casing (2) is connected down.

4. The filter with the automatic cleaning function according to claim 1, wherein a retainer ring (14) is arranged at the bottom of the upper shell (1), a press ring (13) is arranged at the top of the lower shell (2), and the filter screen (8) is pressed and fixed through the retainer ring (14) and the press ring (13).

5. A filter with automatic cleaning function according to claim 1, characterized by further comprising a first non-return valve (19), said first non-return valve (19) being arranged on said inlet pipe (3).

6. A filter with self-cleaning function according to claim 5, further comprising a second check valve (20) and a buoyancy switch (7), wherein the second check valve (20) is arranged on the liquid outlet end pipe (4), the top of the upper shell (1) is provided with an air flow channel (6), the buoyancy switch (7) is arranged in the upper shell (1), and the buoyancy switch (7) is positioned below the air flow channel (6).

7. A filter with automatic cleaning function according to claim 6, characterized in that the buoyancy switch (7) comprises a shell (25) and a float (26), the shell (25) is mounted on the inner wall of the upper shell (1), the bottom of the shell (25) is provided with a through hole (27), the side wall of the shell is provided with an air inlet and outlet (28), and the float (26) is slidably arranged in the shell (25).

8. The filter with automatic cleaning function according to claim 1, further comprising a fixing member (15), wherein the upper housing (1) and the lower housing (2) are detachably connected by the fixing member (15).

9. The filter with self-cleaning function according to claim 8, wherein the fixing member (15) comprises a plurality of snaps, the snaps are annularly arranged along the outer side walls of the upper housing (1) and the lower housing (2), respectively, the snaps of the snaps are arranged on the outer side wall of the upper housing (1), and the clasp assembly of the snaps is arranged on the outer side wall of the lower housing (2).

10. A filter with automatic cleaning function according to claim 1, characterized in that the bristles (10) are made of steel bristles (10).