A filter and its control method

Abstract

The present invention relates to the technical field of filters, and particularly relates to a filter and a control method thereof. The filter provided by the present invention includes a housing, which includes a water inlet, a water outlet and a sewage outlet; a filtering assembly, which includes a filter screen rotatably connected inside the housing, the filter screen is in a cylindrical shape, one end of the filter screen is provided with a liquid inlet communicated with the water inlet, the other end is provided with a first liquid outlet communicated with the sewage outlet, and a plurality of second liquid outlets communicated with the water outlet are arranged on the outer periphery of the filter screen; a driving assembly, connected to the housing, and the power output end is connected to the filter screen; a cleaning assembly, which includes a plurality of nozzles arranged in the housing, and the filter screen is arranged on the spraying paths of the plurality of nozzles. The filter provided by the present invention includes a cleaning assembly, which is convenient for cleaning the filter screen when the filter screen is blocked, and ensures the filtering process.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a filter and a control method thereof. Background Art

[0002] Micro-irrigation is a method of irrigation that uses a pipe system and an emitter installed on the final pipe to deliver water and nutrients required for crop growth at a smaller flow rate, evenly and accurately, directly to the soil near the roots of crops according to crop needs. Therefore, the pipes for transporting water and nutrients will be relatively thin. If there are too many impurities in the water and nutrients, the pipes will be blocked. Therefore, the water and nutrients will first enter the filter for filtration before entering the pipe.

[0003] At present, commonly used filters include sand and gravel filters, mesh filters, laminated filters and centrifugal filters. Mesh filters are widely used due to their simple structure, convenient operation and high filtration efficiency. Since most farmland irrigation uses surface water or river water, the content of sediment and organic matter is high. These sediments and organic matter are easy to adhere to the filter net when filtered through the mesh filter, causing the filter net to be blocked.

[0004] Therefore, a filter that can prevent the filter from being blocked is in urgent need of appearance. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the filter screen of the filter in the prior art is easily clogged, thereby providing a filter that can clean the filter screen by itself and a control method thereof.

[0006] In order to solve the above problems, the present invention provides a filter, comprising:

[0007] A shell, including a water inlet, a water outlet and a sewage outlet;

[0008] A filter assembly, comprising a filter screen rotatably connected to the inside of the housing, the filter screen being cylindrical, one end of the filter screen being provided with a liquid inlet connected to the water inlet, the other end being provided with a first liquid outlet connected to the sewage outlet, and the outer periphery of the filter screen being provided with a plurality of second liquid outlets connected to the water outlet;

[0009] A driving assembly is connected to the housing, and a power output end is connected to the filter screen;

[0010] A cleaning assembly, comprising a plurality of nozzles arranged in the housing, wherein the filter screen is arranged on the spray paths of the plurality of nozzles;

[0011] The filter has a filtering state in which the sewage outlet and the nozzle are closed, and the water outlet, the driving component and the water inlet are opened, and a cleaning state in which the sewage outlet, the driving component and the nozzle are opened, and the water outlet and the water inlet are closed.

[0012] Optionally, the cleaning component further includes:

[0013] Fluid pumps;

[0014] A pipeline has one end connected to the liquid outlet of the fluid pump and the other end extending in the shell along the axial direction of the filter screen and located outside the filter screen. A plurality of nozzles are distributed on the pipeline at intervals and connected to the pipeline.

[0015] Optionally, a plurality of flow guide components are further included, which are connected to the end of the nozzle facing away from the pipeline, and each nozzle is matched with a set of the flow guide components for controlling the spraying angle of the nozzle.

[0016] Optionally, the flow guide component includes:

[0017] A first fan blade, one end of which is rotatably connected to the upper side of the nozzle, and a first connecting hole and a second connecting hole are provided on the first fan blade at intervals;

[0018] A second fan blade, one end of which is rotatably connected to the lower side of the nozzle, a third connection hole, a fourth connection hole and a fifth connection hole are arranged at intervals on the second fan blade, the first connection hole is arranged corresponding to the third connection hole, the second connection hole is arranged corresponding to the fourth connection hole, and the fifth connection hole is arranged close to the third connection hole;

[0019] A pull rope, one end of which is fixedly connected to the first connection hole, and the other end of which is movably passed through the second connection hole, the fourth connection hole, the third connection hole and the fifth connection hole in sequence and then wound around the handle;

[0020] An elastic member has one end connected to the first fan blade at one of the nozzles, and the other end connected to the second fan blade at an adjacent nozzle.

[0021] Optionally, it also includes a pair of extension rods, which are arranged on the pipe at intervals and located at the upper and lower ends of the guide assembly, the elastic member is connected between the extension rod at the top and the first fan blade at the top, and the elastic member is connected between the extension rod at the bottom and the second fan blade at the bottom.

[0022] Optionally, the filter screen is provided with concave portions and / or convex portions on its outer periphery for increasing the surface area.

[0023] Optionally, the concave portions and the convex portions are provided at intervals on the filter net. The concave portions extend along the axial direction of the filter net and are recessed into the filter net; the convex portions extend along the axial direction of the filter net and bulge out of the filter net.

[0024] Optionally, it further includes a pair of support components connected to the inner wall of the housing at intervals along the axial direction of the housing; the pair of support components are respectively rotatably connected to both ends of the filter component.

[0025] Optionally, the filter component further includes a first connecting plate and a second connecting plate respectively connected to both ends of the filter net; a first through hole communicating with the liquid inlet is provided on the first connecting plate, and a first limiting convex ring is further provided on the first connecting plate. The first limiting convex ring extends along the circumferential direction of the first connecting plate towards the direction close to the other end of the filter net; a second through hole communicating with the first liquid outlet is provided on the second connecting plate, and a second limiting convex ring is further provided on the second connecting plate. The second limiting convex ring extends along the circumferential direction of the second connecting plate towards the direction close to the first connecting plate;

[0026] The support component includes a fixing ring and a connecting ring. The outer ring of the fixing ring is connected to the inner wall of the housing, and an installation portion is provided on the inner ring; the connecting ring is detachably connected to the installation portion, and a circular limiting groove is provided on the connecting ring;

[0027] Wherein, the limiting groove of one of the support components is rotatably connected to the first limiting convex ring, and the limiting groove of the other support component is rotatably connected to the second limiting convex ring.

[0028] A control method for a filter, the filter being the above-mentioned filter, the control method of the filter includes:

[0029] Obtain the fluid information at the water inlet;

[0030] Obtain the fluid information at the water outlet;

[0031] Compare the fluid information at the water inlet with the fluid information at the water outlet, and control the filter to switch between the filtering state and the cleaning state according to the comparison result.

[0032] The present invention has the following advantages:

[0033] 1. The filter provided by the present invention comprises a shell, a filter assembly, a drive assembly and a cleaning assembly. The shell comprises a water inlet, a water outlet and a sewage outlet. The filter assembly comprises a filter screen, which is cylindrical and has a liquid inlet, a first liquid outlet and a second liquid outlet. The liquid inlet is connected to the water inlet, the first liquid outlet is connected to the sewage outlet, and the second liquid outlet is connected to the water outlet. The power output end of the drive assembly is connected to the filter screen. The cleaning assembly is provided with a nozzle, and the filter screen is arranged on the spray path of the nozzle.

[0034] When the filter is in the filtering state, the sewage outlet and the nozzle are closed, the water outlet and the water inlet are opened, and at the same time, the driving component drives the filter to rotate, and the raw liquid to be filtered enters the filter from the water inlet through the liquid inlet on the filter. As the filter rotates, the impurities in the raw liquid stay in the filter during the rotation, and the filtered cleaning liquid flows out from the second liquid outlet through the water outlet; when there are many impurities staying on the second liquid outlet of the filter, causing the second liquid outlet to be blocked, the filter enters the cleaning state, at this time the water inlet and the water outlet are closed, the sewage outlet and the nozzle are opened, and the nozzle sprays cleaning liquid on the filter, and at the same time, the driving component drives the filter to rotate, and the cleaning liquid washes away or dissolves some impurities on the second liquid outlet, and the cleaned sewage is discharged through the first liquid outlet through the sewage outlet; when the impurities are cleaned, the filter enters the filtering state again and operates over and over again.

[0035] By providing a cleaning component, the filter screen in the filter can be cleaned through the nozzle when it is clogged, thereby avoiding the situation where the filtration efficiency becomes low or the filtration cannot be performed due to the clogging of the filter screen, and ensuring the filtration.

[0036] 2. The cleaning assembly provided by the present invention also includes a fluid pump and a pipeline. One end of the pipeline is connected to the liquid outlet of the fluid pump, and the other end is extended into the housing. A plurality of nozzles are spaced apart on the pipeline and are connected to the pipeline. The filter screen can be sprayed along the axial direction of the filter screen. When the filter screen rotates, a plurality of nozzles can spray and clean the filter screen in both the axial and circumferential directions to ensure comprehensive cleaning of the filter screen and enhance the cleaning effect. The pipeline is extended into the housing and is located outside the filter screen. It will not occupy the space inside the filter screen. Compared with the cleaning assembly arranged inside the filter screen, when the filter screen rotates and filters, the pipeline will not increase the filtering resistance inside the filter screen, nor will it be damaged by the beating of sediment particles, and will not be blocked by sediment particles. The fluid pump provides power for the delivery of the cleaning fluid and compensates for the pressure difference in the pipeline.

[0037] 3. The several flow guiding components provided by the present invention are connected to the end of the nozzle facing away from the pipeline and are in one-to-one correspondence with the nozzles, and are used to control the spraying angle of the nozzles. When the spraying angle of the nozzle is large, the spraying range of the cleaning liquid is relatively wide, and at this time the jet intensity is relatively small, which is suitable for the situation of slight blockage of a large area of the filter screen; when the spraying angle of the nozzle is small, the spraying range of the cleaning liquid is relatively narrow, and at this time the jet intensity is relatively large, which is suitable for the situation of serious local blockage of the filter screen.

[0038] 4. The flow guiding component provided by the present invention includes a first fan blade, a second fan blade, a pull rope and an elastic member. Among them, the first fan blade is provided with a first connection hole and a second connection hole at intervals, and the second fan blade is provided with a third connection hole, a fourth connection hole and a fifth connection hole at intervals. The first connection hole and the third connection hole are correspondingly arranged, the second connection hole and the fourth connection hole are correspondingly arranged, and the fifth connection hole is arranged close to the third connection hole. One end of the pull rope is fixedly connected to the first connection hole, and the other end sequentially passes through, the second connection hole, the fourth connection hole, the third connection hole, the fifth connection hole and then is wound around the handle. One end of the elastic member is connected to one first fan blade, and the other end is connected to the second fan blade adjacent to the nozzle of this first fan blade. The pull rope is connected to the first fan blade and the second fan blade through this winding method. The initial state of the first fan blade and the second fan blade is an included angle of 180° on both sides of the nozzle. When the handle rotates in one direction, the pull rope is tightened and the elastic member is stretched. Furthermore, the included angle between the first fan blade and the second fan blade gradually decreases, so that the spraying angle of the nozzle decreases and the jet intensity increases; when the handle rotates in the other direction, the pull rope gradually relaxes, and the elastic member drives the first fan blade and the second fan blade at both ends to rotate to restore the initial state through its own elasticity. Furthermore, the included angle between the first fan blade and the second fan blade gradually increases, so that the spraying angle of the nozzle increases and the jet intensity decreases.

[0039] 5. A pair of extension rods provided by the present invention are arranged on the pipeline at intervals and are located at the upper and lower ends of the flow guiding component. The extension rod at the top is connected to the first fan blade at the top through an elastic member, and the extension rod at the bottom is connected to the second fan blade at the bottom through an elastic member. By arranging a pair of extension rods, the first fan blade at the top and the second fan blade at the bottom can also be connected to the elastic member. Furthermore, the flow guiding components at the top and the bottom can also increase the opening angle under the drive of the elastic member and act in the same way as the flow guiding components in the middle.

[0040] 6. The filter screen provided by the present invention is simultaneously provided with concave parts and convex parts suitable for increasing the surface area on the outer periphery, or only provided with concave parts or convex parts. By increasing the surface area of the filter screen, the filtering area is further increased. Under the same working conditions, the filtering efficiency of this kind of filter screen is higher.

[0041] 7. The filter screen provided by the present invention is provided with recesses and protrusions at intervals. The recesses extend along the axial direction of the filter screen and are recessed into the interior of the filter screen, and the protrusions extend along the axial direction of the filter screen and arch outwards from the filter screen, so that the cross-section of the filter screen presents a petal-shaped structure, with a symmetrical and beautiful appearance. Moreover, the combination of concavity and convexity makes the filtering area of the filter screen larger, and the filtering effect on impurities is better when rotating. And during the process of the filter screen rotating for filtration, the recesses and protrusions can exert different acting forces on the impurities. The impurities enter the grooves formed by the protrusions on the inner cavity of the filter screen, and the groove walls on both sides exert different forces on the impurities, making it easier for the impurities to remain in the grooves formed by the protrusions, and the filtering effect is better. The recesses can push the impurities towards the protrusions. The existence of the recesses and protrusions can not only greatly enhance the filtering area, but also continuously change the filtering pressure to obtain a better filtering effect. Both the recesses and protrusions extend along the axial direction of the filter screen, which not only facilitates the raw liquid to be filtered to enter the protrusions, but also avoids impurities remaining in the protrusions and being unable to be discharged during the cleaning state.

[0042] 8. The filter provided by the present invention further includes a pair of support components, which are connected to the inner wall of the housing at intervals along the axial direction of the housing, and the pair of support components are respectively rotatably connected to both ends of the filter component. The support components provide a supporting force for the filter component and create a rotatable platform for the filter component.

[0043] 9. The filter component of the filter provided by the present invention further includes a first connecting plate and a second connecting plate, which are respectively connected to both ends of the filter screen. The first connecting plate is provided with a first through hole and a first limiting convex ring. The first through hole is communicated with the liquid inlet of the filter screen, and the first limiting convex ring extends towards the second connecting plate. The second connecting plate is provided with a second through hole and a second limiting convex ring. The second through hole is communicated with the first liquid outlet, and the second limiting convex ring is arranged opposite to the first limiting convex ring; the pair of support components includes a fixed ring and a connecting ring. The outer ring of the fixed ring is connected to the inner wall of the housing, and the inner ring is connected to the connecting ring. The connecting ring is provided with a limiting groove. Among them, the limiting groove of one support component is rotatably connected to the first limiting convex ring, and the limiting groove of the other support component is rotatably connected to the second limiting convex ring.

[0044] The filter screen is rotatably connected to the housing through the first connecting plate and the second connecting plate, and is respectively connected and matched with the two limiting grooves through the first limiting convex ring and the second limiting convex ring to limit the rotation trajectory of the filter screen, so that the filter screen moves along a fixed trajectory to prevent derailment. At the same time, the second limiting convex ring is arranged in the opposite direction to the first limiting convex ring, which is convenient for the first liquid outlet to be communicated with the sewage discharge port, so that the cleaning sewage can be directly discharged from the sewage discharge port, avoiding the sewage being discharged from the water outlet.

[0045] The filter screen is supported by a support component, and a track is provided for the rotation of the filter screen. At the same time, two connecting rings are respectively connected to the first connecting plate and the second connecting plate, dividing the interior of the housing into upper, middle, and lower chambers. The stock solution entering from the water inlet can only enter the filter screen through the liquid inlet for filtration. The cleaning liquid can only flow out through the second liquid outlet and then through the water outlet under the action of centrifugal force. The sewage and impurities are discharged through the first liquid outlet and then through the sewage outlet under the action of gravity. The liquids in the three chambers will not be mixed, avoiding contamination of the cleaning liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0047] Figure 1 FIG. shows the structural schematic diagram of the filter provided by the present invention.

[0048] Figure 2 FIG. shows the structural schematic diagram of the cleaning component provided by the present invention.

[0049] Figure 3 FIG. shows the structural schematic diagram of the diversion component provided by the present invention.

[0050] Figure 4 FIG. shows the structural schematic diagram of the filter screen provided by the present invention.

[0051] Figure 5 FIG. shows the structural schematic diagram of the connecting ring provided by the present invention.

[0052] DESCRIPTION OF THE REFERENCE NUMERALS:

[0053] 1. Housing; 11. Water inlet; 12. Water outlet; 13. Drainage port; 2. Filter assembly; 21. Filter screen; 211. Liquid inlet; 212. First liquid outlet; 213. Second liquid outlet; 214. Concave part; 215. Convex part; 22. First connecting plate; 221. First through hole; 222. First limiting convex ring; 23. Second connecting plate; 231. Second through hole; 232. Second limiting convex ring; 3. Driving assembly; 4. Cleaning assembly; 41. Nozzle; 42. Pipeline; 5. Flow guiding assembly; 51. First fan blade; 511. First connecting hole; 512. Second connecting hole; 52. Second fan blade; 521. Third connecting hole; 522. Fourth connecting hole; 523. Fifth connecting hole; 53. Pull rope; 54. Handle; 55. Elastic member; 56. Extension rod; 6. Support assembly; 61. Fixed ring; 62. Connecting ring; 621. Limiting groove; 7. First detection assembly; 8. Second detection assembly; 9. Control box. Detailed implementation manners

[0054] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0056] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0058] This embodiment provides a filter, as Figures 1 to 5 shown, which includes a housing 1, a filter component 2, a driving component 3, and a cleaning component 4.

[0059] The housing 1 includes a water inlet 11, a water outlet 12, and a sewage outlet 13. Further, a water inlet pipe is provided at the water inlet 11, a water outlet pipe is provided at the water outlet 12, and a sewage pipe is provided at the sewage outlet 13. No further limitation is imposed on the materials of the water inlet pipe, the water outlet pipe, and the sewage pipe here, and they can be the same as the material of the housing 1. Optionally, they can be made of metal.

[0060] The filter component 2 includes a filter net 21 rotatably connected inside the housing 1. The filter net 21 is in a cylindrical shape. One end of the filter net 21 is provided with a liquid inlet 211 communicating with the water inlet 11, and the other end is provided with a first liquid outlet 212 communicating with the sewage outlet 13. A plurality of second liquid outlets 213 communicating with the water outlet 12 are provided on the outer periphery of the filter net 21.

[0061] The driving component 3 is connected to the housing 1, and the power output end is connected to the filter net 21. Specifically, the driving component 3 includes a motor and a solar power supply device. The motor is arranged on the top of the housing 1, and the solar power supply device is arranged on the periphery of the housing 1. The solar power supply device makes full use of natural energy to supply power to the motor. A rotating shaft is provided at the output end of the motor. The rotating shaft extends inside the housing 1 and passes through the filter net 21. A plurality of connecting rods are provided on the rotating shaft. One end of each connecting rod is connected to the rotating shaft, and the other end is connected to the filter net. Further, the connecting rods can be perpendicular to the rotating shaft and the filter net. Thus, the rotating shaft rotates under the drive of the motor, and the connecting rods drive the filter net 21 to rotate along with the rotating shaft, realizing the rotation of the filter net 21, which is convenient for the filter net 21 to drive the original liquid to be filtered to rotate, so that the impurities in the original liquid stay on the filter net 21 to complete the filtering operation.

[0062] As Figure 2 shown, the cleaning component 4 includes a plurality of nozzles 41 arranged inside the housing 1, and the filter net 21 is arranged on the spraying paths of the plurality of nozzles 41. Specifically, the plurality of nozzles 41 are arranged parallel to the axial direction of the filter net 21. The distance between the plurality of nozzles 41 and the filter net 21 can be appropriately adjusted according to the jet intensity of the nozzles 41. Optionally, the nozzles 41 can be in a tubular shape, a horn shape, etc.

[0063] Among them, the filter has a filtering state in which the sewage outlet 13 and the nozzle 41 are closed, and the water outlet 12, the driving assembly 3 and the water inlet 11 are opened, and a cleaning state in which the sewage outlet 13, the driving assembly 3 and the nozzle 41 are opened, and the water outlet 12 and the water inlet 11 are closed. When the filter is in the filtering state, the sewage outlet 13 and the nozzle 41 are closed, the water outlet 12 and the water inlet 11 are opened. At the same time, the driving assembly 3 drives the filter screen 21 to rotate. The stock solution to be filtered enters the filter screen 21 from the water inlet 11 through the liquid inlet 211 on the filter screen 21. As the filter screen 21 rotates, the impurities in the stock solution stay on the second liquid outlet 213 of the filter screen 21 during the rotation process, and the cleaning liquid flows out through the water outlet 12 from the second liquid outlet 213; when there are more impurities staying on the second liquid outlet 213 of the filter screen 21, that is, when the second liquid outlet 213 is blocked, the filter enters the cleaning state. At this time, the water inlet 11 and the water outlet 12 are closed, the sewage outlet 13 and the nozzle 41 are opened, the nozzle 41 sprays the cleaning liquid on the filter screen 21, and at the same time, the driving assembly 3 drives the filter screen 21 to rotate. Then, the cleaning liquid flushes away or dissolves some of the impurities on the second liquid outlet 213, and the sewage from the cleaning is discharged through the sewage outlet 13 via the first liquid outlet 212; after the impurities are cleaned up, the filter enters the filtering state again and operates in a cycle.

[0064] At the same time, by arranging a cleaning assembly 4 in the filter, the filter screen 21 in the filter can be cleaned by the nozzle 41 when it is blocked, avoiding the situation that the filtering efficiency becomes low or filtering cannot be carried out due to the blockage of the filter screen 21, and ensuring the filtering process.

[0065] Optionally, the cleaning component 4 also includes a fluid pump and a pipe 42. One end of the pipe 42 is connected to the liquid outlet of the fluid pump, and the other end is extended along the axial direction of the filter 21 in the housing 1 and is located outside the filter 21. A plurality of nozzles 41 are distributed on the pipe 42 at intervals and are connected to the pipe 42. Further, a plurality of nozzles 41 are evenly distributed along the pipe 42. Specifically, the pipe 42 is arranged parallel to the axial direction of the filter 21. The number of the pipes 42 is not further limited here, and can be one, two or more. When there are multiple pipes 42, they can be distributed at intervals around the filter 21. Preferably, multiple pipes 42 are evenly distributed around the filter 21. The greater the number, the higher the cleaning efficiency. A plurality of nozzles 41 can spray the filter 21 along the axial direction of the filter 21. When the filter 21 rotates, the plurality of nozzles 41 can spray and clean the filter 21 in both the axial and circumferential directions, thereby ensuring that the filter 21 is fully cleaned and enhancing the cleaning effect. The pipe 42 is extended in the housing and located outside the filter 21, and does not occupy the space inside the filter 21. Compared with the cleaning component 4 being arranged inside the filter 21, when the filter 21 rotates and filters, the pipe 42 does not increase the filtering resistance inside the filter 21, nor is it damaged by the beating of silt particles, and is not blocked by silt particles, etc. The fluid pump provides power for the delivery of the cleaning fluid and compensates for the pressure difference in the pipe 42. Specifically, the cleaning fluid can be water or other solvents that can dissolve impurities, and the solvent is selected according to the specific impurity composition.

[0066] Optionally, the present embodiment further includes a plurality of flow guide components 5 connected to the end of the nozzle 41 away from the pipe 42, and each nozzle 41 is matched with a set of flow guide components 5 for controlling the spray angle of the nozzle 41. When the spray angle of the nozzle 41 is large, the spray range of the cleaning liquid is wide, and the jet intensity is relatively small at this time, which is suitable for the case where the filter screen 21 is slightly blocked over a large area; when the spray angle of the nozzle 41 is small, the spray range of the cleaning liquid is narrow, and the jet intensity is relatively large at this time, which is suitable for the case where the filter screen 21 is severely blocked locally.

[0067] As a specific implementation method, Figure 3 As shown, the air guide assembly 5 includes a first fan blade 51 , a second fan blade 52 , a pull rope 53 and an elastic member 55 .

[0068] One end of the first blade 51 is rotatably connected to the upper side of the nozzle 41 , and a first connecting hole 511 and a second connecting hole 512 are provided on the first blade 51 at intervals.

[0069] One end of the second fan blade 52 is rotatably connected to the lower side of the nozzle 41. Third connection holes 521, fourth connection holes 522, and fifth connection holes 523 are provided on the second fan blade 52 at intervals. The first connection hole 511 and the third connection hole 521 are correspondingly arranged. The second connection hole 512 and the fourth connection hole 522 are correspondingly arranged. The fifth connection hole 523 is arranged close to the third connection hole 521. Specifically, the shapes of the first fan blade 51 and the second fan blade 52 can be rectangular, fan-shaped, etc.; the first connection hole 511, the second connection hole 512, the third connection hole 521, the fourth connection hole 522, and the fifth connection hole 523 can be round holes, square holes, etc.

[0070] One end of the pull rope 53 is fixedly connected to the first connection hole 511, and the other end sequentially passes through the second connection hole 512, the fourth connection hole 522, the third connection hole 521, and the fifth connection hole 523 in a movable manner and then is wound around the handle 54. As a specific implementation manner, the pull rope 53 has elasticity and is an elastic rope; as another implementation manner, the pull rope 53 has no elasticity.

[0071] As an implementation manner, there is one pull rope 53, which is connected to each group of the first fan blade 51 and the second fan blade 52 in the above manner in sequence. As a changeable implementation manner, there are multiple pull ropes 53, and each pull rope 53 controls a group of the first fan blade 51 and the second fan blade 52. As a changeable implementation manner, there are multiple pull ropes 53, and each pull rope 53 controls two groups of the first fan blade 51 and the second fan blade 52.

[0072] As a changeable implementation manner, one end of the pull rope 53 close to the handle 54 is directly fixedly connected to the handle 54 without winding. At this time, pulling the handle 54 in the direction away from the pull rope 53 can be done. As an implementation manner, there is one handle 54, which is connected to one pull rope 53; as another implementation manner, there are multiple handles 54, and multiple handles 54 correspond to multiple pull ropes 53 one by one; as another implementation manner, there are multiple handles 54, and one handle 54 is connected to two pull ropes 53.

[0073] One end of the elastic member 55 is connected to the first fan blade 51 at one nozzle 41, and the other end is connected to the second fan blade 52 at the adjacent nozzle 41. Specifically, the elastic member 55 can be a spring, an elastic rope, etc.

[0074] The pull rope 53 is connected to the first blade 51 and the second blade 52 in the above-mentioned winding manner. The initial state of the first blade 51 and the second blade 52 is that they are located on both sides of the nozzle 41 with an included angle of 180°. When the handle 54 rotates in one direction, the pull rope 53 is tightened and the elastic member 55 is stretched. As a result, the included angle between the first blade 51 and the second blade 52 gradually decreases, causing the spraying angle of the nozzle 41 to decrease and the jet intensity to increase. When the handle 54 rotates in the other direction, the pull rope 53 gradually relaxes, and the elastic member 55 drives the first blade 51 and the second blade 52 at both ends to rotate back to the initial state through its own elasticity. As a result, the included angle between the first blade 51 and the second blade 52 gradually increases, causing the spraying angle of the nozzle 41 to increase and the jet intensity to decrease.

[0075] Optionally, this embodiment further includes a pair of extension rods 56, which are spaced apart on the pipeline 42 and located at the upper and lower ends of the flow guiding assembly 5. An elastic member 55 is connected between the extension rod 56 at the top and the first blade 51 at the top, and an elastic member 55 is connected between the extension rod 56 at the bottom and the second blade 52 at the bottom. Specifically, the length of the extension rod 56 can be the same as the length of the nozzle 41, making the cleaning assembly 4 more aesthetically pleasing as a whole. By providing a pair of extension rods 56, the first blade 51 at the top and the second blade 52 at the bottom can also be connected to the elastic member 55. As a result, the flow guiding assemblies 5 at the top and the bottom can also increase the opening angle under the drive of the elastic member 55, acting in the same manner as the flow guiding assembly 5 in the middle.

[0076] Optionally, as a specific implementation manner, both concave portions 214 and convex portions 215 adapted to increase the surface area are provided on the outer periphery of the filter net 21; as another specific implementation manner, only concave portions 214 adapted to increase the surface area are provided on the outer periphery of the filter net 21; as another specific implementation manner, only convex portions 215 adapted to increase the surface area are provided on the outer periphery of the filter net 21. By increasing the surface area of the filter net 21, the filtering area is increased. Under the same working conditions, the filtering efficiency of this type of filter net 21 is higher.

[0077] Optionally, as Figure 4As shown, the concave portions 214 and the convex portions 215 are provided on the filter screen 21 at intervals. The concave portions 214 extend along the axial direction of the filter screen 21 and are recessed into the filter screen 21; the convex portions 215 extend along the axial direction of the filter screen 21 and arch outwards from the filter screen 21. The cross-section of the filter screen 21 is in a petal-shaped structure, with a symmetrical and beautiful appearance. The combination of concave and convex makes the filtering area of the filter screen larger, and the filtering effect on impurities is better when rotating. During the rotation and filtration process of the filter screen 21, the concave portions 214 and the convex portions 215 can apply different acting forces to the impurities. The impurities enter the grooves formed by the convex portions 215 on the inner cavity of the filter screen 21, and the two side groove walls apply different forces to the impurities, making it easier for the impurities to remain in the grooves formed by the convex portions 215, and the filtering effect is better. The concave portions 214 can push the impurities towards the convex portions 215. The presence of the concave portions 214 and the convex portions 215 can not only greatly increase the filtering area, but also continuously change the filtering pressure to obtain a better filtering effect. Both the concave portions 214 and the convex portions 215 extend along the axial direction of the filter screen 21, which is convenient for the raw liquid to be filtered to enter the convex portions 215, and also avoids impurities remaining in the convex portions 215 and being unable to be discharged during the cleaning state.

[0078] Optionally, this embodiment further includes a pair of support components 6 that are connected to the inner wall of the housing 1 at intervals along the axial direction of the housing 1; the two support components 6 are respectively rotatably connected to the two ends of the filter component 2. The support components 6 provide a supporting force for the filter component 2 and create a rotatable platform for the filter component 2.

[0079] Optionally, the filter component 2 further includes a first connecting plate 22 and a second connecting plate 23 respectively connected to the two ends of the filter screen 21; a first through hole 221 communicating with the liquid inlet 211 is provided on the first connecting plate 22, and a first limiting convex ring 222 is further provided on the first connecting plate 22, and the first limiting convex ring 222 extends along the circumferential direction of the first connecting plate 22 towards the direction close to the other end of the filter screen 21; a second through hole 231 communicating with the first liquid outlet 212 is provided on the second connecting plate 23, and a second limiting convex ring 232 is further provided on the second connecting plate 23, and the second limiting convex ring 232 extends along the circumferential direction of the second connecting plate 23 towards the direction close to the first connecting plate 22. As another specific implementation manner, the second limiting convex ring 232 is arranged in the same direction as the first limiting convex ring 222.

[0080] The support component 6 includes a fixing ring 61 and a connecting ring 62. The outer ring of the fixing ring 61 is connected to the inner wall of the housing 1, and an installation portion is provided on the inner ring; as Figure 5 shown, the connecting ring 62 is detachably connected to the installation portion, and a circular limiting groove 621 is provided on the connecting ring 62. Specifically, the installation portion is an annular groove, asFigure 1 As shown, the connecting ring 62 is connected to the mounting portion by bolts. Among them, the limiting groove 621 of one support assembly 6 is rotatably connected to the first limiting convex ring 222, and the limiting groove 621 of the other support assembly 6 is rotatably connected to the second limiting convex ring 232.

[0081] The filter screen 21 is rotatably connected in the housing 1 through the first connecting plate 22 and the second connecting plate 23. The rotation trajectory of the filter screen 21 is restricted by the cooperation of the first limiting convex ring 222 and the second limiting convex ring 232 with the limiting groove 621, so that the filter screen 21 moves along a fixed trajectory to prevent derailment. At the same time, the second limiting convex ring 232 is arranged in the opposite direction to the first limiting convex ring 222, which is convenient for the first liquid outlet 212 to communicate with the sewage outlet 13, so that the cleaning sewage can be directly discharged from the sewage outlet 13, avoiding the sewage being discharged from the water outlet 12.

[0082] The support assembly 6 supports the filter screen 21 and provides a track for the rotation of the filter screen 21. At the same time, the two connecting rings 62 are respectively connected with the first connecting plate 22 and the second connecting plate 23 in a matching manner, dividing the interior of the housing 1 into upper, middle and lower chambers. The raw liquid entering from the water inlet 11 can only enter the filter screen 21 through the liquid inlet 211 for filtration, the cleaning liquid can only flow out through the second liquid outlet 213 via the water outlet 12, and the sewage can only be discharged through the first liquid outlet 212 via the sewage outlet 13. Therefore, the liquids in the three chambers will not be confused, avoiding contamination of the cleaning liquid.

[0083] A control method for a filter, the filter being the above-mentioned filter. The control method of the filter includes obtaining the fluid information at the water inlet 11; obtaining the fluid information at the water outlet 12; comparing the fluid information at the water inlet 11 with the fluid information at the water outlet 12, and controlling the filter to switch between the filtering state and the cleaning state according to the comparison result. Specifically, the fluid information can be pressure information or flow information. When the difference between the pressure information or flow information at the water inlet 11 and the pressure information or flow information at the water outlet 12 reaches a preset value, the filter switches its working state.

[0084] Optionally, this embodiment further includes a first detection component 7, a second detection component 8, and a control box 9. The first detection component 7 is disposed at the water inlet 11; the second detection component 8 is disposed at the water outlet 12; the control box 9 is communicatively connected to the first detection component 7 and the second detection component 8, and the control box 9 is adapted to receive the detection results of the first detection component 7 and the second detection component 8, and control the filter to switch between the filtering state and the cleaning state according to the detection results. Specifically, a water inlet pipe is provided at the water inlet 11, a water outlet pipe is provided at the water outlet 12, the first detection component 7 is disposed on the water inlet pipe, and the second detection component 8 is disposed on the water outlet pipe. The first detection component 7 and the second detection component 8 can be a pressure gauge or a flow meter, etc. When the difference between the measured values of the first detection component 7 and the second detection component 8 reaches a preset value, the filter stops the filtering operation and starts the cleaning operation. When the difference is less than the preset value, the filter continues the filtering operation.

[0085] Optionally, this embodiment further includes a sewage discharge pipe, which is disposed at the bottom of the housing 1 and communicated with the first liquid outlet 212.

[0086] Optionally, a first switch is provided on the water inlet pipe, a second switch is provided on the water outlet pipe, a third switch is provided on the sewage discharge pipe, and a fourth switch is provided on the fluid pump. The first switch, the second switch, the third switch, and the fourth switch are all communicatively connected to the control box 9.

[0087] The communication connection herein can be a Bluetooth connection, a WIFI connection, or a wire connection, etc.

[0088] Working principle:

[0089] When the filter is filtering normally, the control box 9 controls the first switch and the second switch to be turned on. The first detection component 7 and the second detection component 8 detect the pressures of the water inlet pipe and the water outlet pipe. The undiluted solution to be filtered enters the filter net 21 from the liquid inlet 211 of the filter net 21 through the water inlet pipe. The driving component 3 drives the filter net 21 to rotate. Then the undiluted solution rotates along with the filter net 21. During the rotation process, the impurities in the undiluted solution stay on the filter net 21, and the filtered cleaning liquid is discharged from the second liquid outlet 213 on the filter net 21 through the water outlet 12.

[0090] When the pressure difference detected by the first detection component 7 and the second detection component 8 reaches a preset value, the filter net 21 stops filtering and cleans itself. The control box 9 controls both the first switch and the second switch to close, and controls both the third switch and the fourth switch to open. The fluid pump supplies a cleaning agent to the pipeline 42, and sprays the cleaning agent onto the filter net 21 through the nozzle 41. The driving component 3 continues to drive the filter net 21 to rotate, so that the cleaning liquid dissolves or flushes away the impurities on the filter net 21. The sewage from the cleaning flows out through the sewage pipeline from the first liquid outlet 212 of the filter net 21. Each time a cleaning operation is performed, the amount of the cleaning liquid is fixed. After the cleaning is completed, the first switch and the second switch are opened, and the original liquid is introduced. If the measurement difference between the first detection component 7 and the second detection component 8 is lower than the preset value, the cleaning is completed and the filtering operation is performed; otherwise, a second cleaning is performed.

[0091] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. The obvious changes or variations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A filter, characterized in that, Comprising: A housing (1), including a water inlet (11), a water outlet (12), and a sewage outlet (13); A filter assembly (2), including a filter net (21) rotatably connected inside the housing (1), the filter net (21) being cylindrical, one end of the filter net (21) being provided with a liquid inlet (211) communicating with the water inlet (11), the other end being provided with a first liquid outlet (212) communicating with the sewage outlet (13), and a plurality of second liquid outlets (213) communicating with the water outlet (12) being provided on the outer periphery of the filter net (21); A drive assembly (3), connected to the housing (1), with the power output end connected to the filter net (21); A cleaning assembly (4), including a plurality of nozzles (41) provided inside the housing (1), the filter net (21) being arranged on the spraying paths of the plurality of nozzles (41); Wherein, the filter has a filtering state in which the sewage outlet (13) and the nozzles (41) are closed, and the water outlet (12), the drive assembly (3), and the water inlet (11) are opened, and a cleaning state in which the sewage outlet (13), the nozzles (41), and the drive assembly (3) are opened, and the water outlet (12) and the water inlet (11) are closed; The cleaning assembly (4) further includes: A fluid pump; A pipeline (42), one end of which is communicated with the liquid outlet end of the fluid pump, and the other end extends axially along the filter net (21) inside the housing (1) and is located outside the filter net (21), and a plurality of the nozzles (41) are spaced apart and distributed on the pipeline (42) and are communicated with the pipeline (42); A plurality of flow guiding assemblies (5), connected to the end of the nozzle (41) facing away from the pipeline (42), and each nozzle (41) is matched with a group of the flow guiding assemblies (5) for controlling the spraying angle of the nozzle (41); The flow guiding assembly (5) includes: A first fan blade (51), one end of which is rotatably connected to the upper side of the nozzle (41), and the first fan blade (51) is provided with a first connection hole (511) and a second connection hole (512) at intervals; A second fan blade (52), one end of which is rotatably connected to the lower side of the nozzle (41), and the second fan blade (52) is provided with a third connection hole (521), a fourth connection hole (522), and a fifth connection hole (523) at intervals, the first connection hole (511) and the third connection hole (521) are correspondingly arranged, the second connection hole (512) and the fourth connection hole (522) are correspondingly arranged, and the fifth connection hole (523) is arranged close to the third connection hole (521); the initial state of the first fan blade (51) and the second fan blade (52) is an included angle of 180° on both sides of the nozzle (41); The pull cord (53) has one end fixedly connected to the first connection hole (511), and the other end sequentially passes through the second connection hole (512), the fourth connection hole (522), the third connection hole (521), and the fifth connection hole (523) movably and then is wound around the handle (54). The elastic member (55) has one end connected to the first fan blade (51) at one of the nozzles (41), and the other end connected to the second fan blade (52) at the adjacent nozzle (41). A pair of extension rods (56) are spaced on the pipe (42) and are located at the upper and lower ends of the diversion assembly (5). An elastic member (55) is connected between the extension rod (56) at the top and the first fan blade (51) at the top, and an elastic member (55) is connected between the extension rod (56) at the bottom and the second fan blade (52) at the bottom.

2. The filter according to claim 1, characterized in that, Recesses (214) and / or protrusions (215) adapted to increase the surface area are provided on the outer periphery of the filter net (21).

3. The filter according to claim 2, characterized in that, The recesses (214) and the protrusions (215) are spaced on the filter net (21). The recesses (214) extend along the axial direction of the filter net (21) and are formed by being recessed towards the inside of the filter net (21); the protrusions (215) extend along the axial direction of the filter net (21) and are formed by arching towards the outside of the filter net (21).

4. The filter according to claim 1, characterized in that, It further includes a pair of support assemblies (6) connected to the inner wall of the housing (1) at intervals along the axial direction of the housing (1); the pair of support assemblies (6) are respectively rotatably connected to both ends of the filter assembly (2).

5. The filter according to claim 4, characterized in that, The filter assembly (2) further includes a first connecting plate (22) and a second connecting plate (23) respectively connected to both ends of the filter net (21); a first through hole (221) communicating with the liquid inlet (211) is provided on the first connecting plate (22), and a first limiting convex ring (222) is further provided on the first connecting plate (22), and the first limiting convex ring (222) extends along the circumferential direction of the first connecting plate (22) towards the direction close to the other end of the filter net (21); a second through hole (231) communicating with the first liquid outlet (212) is provided on the second connecting plate (23), and a second limiting convex ring (232) is further provided on the second connecting plate (23), and the second limiting convex ring (232) extends along the circumferential direction of the second connecting plate (23) towards the direction close to the first connecting plate (22). The support assembly (6) includes a fixed ring (61) and a connecting ring (62). The outer ring of the fixed ring (61) is connected to the inner wall of the housing (1), and an installation part is provided on the inner ring; the connecting ring (62) is detachably connected to the installation part, and a circular limiting groove (621) is provided on the connecting ring (62). Wherein, the limiting groove (621) of one of the support components (6) is rotatably connected to the first limiting convex ring (222), and the limiting groove (621) of the other support component (6) is rotatably connected to the second limiting convex ring (232).

6. A control method for a filter, characterized in that, The filter is the filter according to any one of claims 1-5, and the control method of the filter comprises: acquiring fluid information at the water inlet (11); acquiring fluid information at the water outlet (12); comparing the fluid information at the water inlet (11) with the fluid information at the water outlet (12), and controlling the filter to switch between the filtering state and the cleaning state according to the comparison result.

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