A self-cleaning filtration device

Abstract

The application discloses a self-cleaning filter device, which comprises a water passing assembly and a filter assembly. The water passing assembly comprises a through pipe, a square spring, a first square frame and a second square frame. The filter assembly is arranged in the water passing assembly and comprises a filter plate, a baffle, a connecting rod and a limiting sliding part. A sewage discharging assembly is arranged on one side of the filter assembly and comprises a telescopic filter part and a telescopic baffle part. When the water passing assembly, the filter assembly and the sewage discharging assembly cooperate, the filter plate is pushed by the water flow and turns the side facing the water flow to the sewage discharging port when the impurities on the filter plate increase with time, so that the filter plate is cleaned by the water flow, and the device is not blocked.

Description

Technical Field

[0001] This invention relates to the field of pipeline filtration technology, and in particular to a self-cleaning filtration device. Background Technology

[0002] When filtering impurities in a pipeline, a large amount of debris accumulates on the filter plate over time, clogging the filter pores and reducing the filter plate's filtration capacity. The increased water pressure on the filter plate also causes deformation, further affecting its filtration efficiency. Traditional filtration devices require manual filter plate replacement, which wastes considerable time and is inefficient. Therefore, a filtration device is needed that utilizes water flow and the filter plate's own properties to clean itself. When there are too many impurities on the filter plate and the water pressure increases, the plate can reverse, turning the side facing the water flow towards the drain outlet, allowing the water to directly flush the filter plate and achieve self-cleaning. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the problem to be solved by the present invention is how to utilize the properties of the filter plate and the flowing water to flush the filter plate itself, thereby achieving the purpose of self-cleaning.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a self-cleaning filtration device, which includes a water passing component, a filtration component and a sewage discharge component.

[0006] As a preferred embodiment of the self-cleaning filter device of the present invention, the water-passing assembly includes a through pipe, a square spring, a first square frame and a second square frame, wherein the square spring is disposed inside the bottom end of the through pipe, the first square frame is disposed at the bottom of the square spring, and the second square frame is fixed to the top of the square spring.

[0007] A filter assembly, disposed inside the water-passing assembly, includes a filter plate, a baffle, a connecting rod, and a limiting slide. The filter plate is disposed at one end of the through pipe, the baffle is disposed at the other end of the through pipe, and the connecting rod connects the baffle and the filter plate; and...

[0008] A sewage discharge assembly is disposed on one side of the filter assembly, including a telescopic filter element and a telescopic baffle. The telescopic filter element is disposed on one side of the filter plate, and the telescopic baffle is disposed inside the baffle.

[0009] As a preferred embodiment of the self-cleaning filter device of the present invention, the pipe is provided with an inlet, an outlet and a drain outlet, the inlet is located at one end of the top of the pipe and the outlet is located at the other end of the top of the pipe, and the inlet and the outlet are symmetrically distributed about the drain outlet.

[0010] As a preferred embodiment of the self-cleaning filter device of the present invention, the through pipe is further provided with a translation cavity, the translation cavity being disposed at the top of the drain outlet, and the through pipe is further provided with a first arc groove, a second arc groove, a third arc groove, and a fourth arc groove, the first arc groove being disposed at the end of the inlet near the outlet, the second arc groove being disposed at the bottom of the first arc groove, the third arc groove being disposed at the end of the outlet near the inlet, and the fourth arc groove being disposed at the bottom of the third arc groove.

[0011] In a preferred embodiment of the self-cleaning filter device of the present invention, the bottom of the first arc groove and the top of the fourth arc groove are connected, the top of the second arc groove and the bottom of the third arc groove are connected, the width of the first arc groove and the third arc groove is smaller than the width of the second arc groove and the fourth arc groove, and the depth of the first arc groove and the third arc groove is greater than the depth of the second arc groove and the fourth arc groove.

[0012] In a preferred embodiment of the self-cleaning filter device of the present invention, the first square frame is positioned in the middle of the inner wall of the drain outlet, and the bottom of the square spring and the top of the first square frame are attached together.

[0013] In a preferred embodiment of the self-cleaning filter device of the present invention, the filter plate is provided with a first side post, a second side post, and a locking key. The first side post is located at one end of the filter plate, the second side post is located at the other end of the filter plate, and the locking key is located on both sides of the filter plate. The two ends of the first side post cooperate with the first arc groove, and the two ends of the second side post are directly opposite the second arc groove. The filter plate is also provided with a first positioning groove and a second positioning groove. The first positioning groove is located on one side of the second side post, and the second positioning groove is located at the bottom of the first positioning groove.

[0014] In a preferred embodiment of the self-cleaning filter device of the present invention, the baffle is provided with a No. 3 side post and a No. 4 side post, the No. 3 side post being disposed at one end of the baffle and the No. 4 side post being disposed at the other end of the baffle; the two ends of the No. 3 side post are engaged with the No. 3 arc groove, and the two ends of the No. 4 side post are directly opposite the No. 4 arc groove; the baffle is also provided with a No. 3 positioning groove, a No. 4 positioning groove and a telescopic hole, the No. 3 positioning groove being disposed on one side of the No. 4 side post, the No. 4 positioning groove being disposed at the bottom of the No. 3 positioning groove, and the telescopic hole penetrating one side of the baffle, the No. 3 side post and the No. 4 side post.

[0015] In a preferred embodiment of the self-cleaning filter device of the present invention, the filter assembly further includes a connecting rod and a limiting slide. One end of the connecting rod is sleeved on the second side post, and the other end is sleeved on the fourth side post. One end of the connecting rod engages with the second positioning groove, and the other end engages with the fourth positioning groove. There are two limiting slides, each including a limiting frame and a limiting block. One end of the limiting frame engages with the end of the second side post, and the other end engages with the end of the fourth side post. One limiting block engages with the second arc groove, and the other limiting block engages with the fourth arc groove.

[0016] As a preferred embodiment of the self-cleaning filtration device of the present invention, the telescopic filter element includes a first fixing plate, a first fixing spring, and a half filter plate. The first fixing plate is disposed in the middle of the filter plate, and both ends of the first fixing plate are fixed to the middle of the locking key. There are two first fixing springs, which are disposed on both sides of the first fixing plate. The half filter plate is disposed at the end of the first fixing spring away from the first fixing plate.

[0017] In a preferred embodiment of the self-cleaning filter device of the present invention, the telescopic baffle includes a second fixed plate, a second fixed spring, a first half baffle, and a second half baffle. The second fixed plate is disposed in the middle section of the telescopic hole. There are two second fixed springs, disposed on both sides of the second fixed plate. The first half baffle is disposed at the end of the second fixed spring near the water inlet, and the end of the first half baffle is in contact with the second side post. The second half baffle is disposed at the end of the second fixed spring near the water outlet, and the end of the second half baffle is in contact with the top of the translation cavity.

[0018] The beneficial effects of this invention are as follows: With the cooperation of the water flow assembly, the filter assembly and the sewage discharge assembly, our invention allows the filter plate to be pushed by the water flow and turn the side facing the water flow toward the sewage discharge port when filtering water. This allows the filter plate to clean itself using the water flow without worrying about the device getting clogged. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is an overall structural diagram of a self-cleaning filter device.

[0021] Figure 2 This is an overall cross-sectional view of a self-cleaning filter device.

[0022] Figure 3 This is a structural diagram of the filter plate assembly for a self-cleaning filter device.

[0023] Figure 4 This is a partial structural diagram of the filter plate assembly of a self-cleaning filter device.

[0024] Figure 5 This is a structural diagram of the baffle assembly for a self-cleaning filter device.

[0025] Figure 6 This is a partial structural diagram of the baffle assembly of a self-cleaning filter device.

[0026] Figure 7 This is a structural diagram of the filter assembly for a self-cleaning filter device.

[0027] Figure 8 This is a structural diagram of the water-passing component of a self-cleaning filter device.

[0028] Figure 9 This is a structural diagram of the limiting slide of a self-cleaning filter device.

[0029] Figure 10 This is a structural diagram of the sewage discharge component of a self-cleaning filter device. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0033] Example 1

[0034] Reference Figures 1-10 This is the first embodiment of the present invention. This embodiment provides a self-cleaning filter device, which includes a water passing component 100, a filter component 200, and a sewage discharge component 300.

[0035] Specifically, the water-passing assembly 100 includes a pipe 101, a square spring 103, a first square frame 102, and a second square frame 104. The square spring 103 is located inside the bottom end of the pipe 101, the first square frame 102 is located at the bottom of the square spring 103, and the second square frame 104 is fixed to the top of the square spring 103.

[0036] The water-passing component 100 is used to pass water.

[0037] The filter assembly 200 is disposed inside the water flow assembly 100 and includes a filter plate 201, a baffle 202, a connecting rod 203 and a limiting slide 204. The filter plate 201 is disposed at one end of the through pipe 101, the baffle 202 is disposed at the other end of the through pipe 101, and the connecting rod 203 connects the baffle 202 and the filter plate 201.

[0038] The filter assembly 200 is used to filter impurities in flowing water.

[0039] The sewage discharge component 300 is disposed on one side of the filter component 200 and includes a telescopic filter element 301 and a telescopic baffle 302. The telescopic filter element 301 is disposed on one side of the filter plate 201, and the telescopic baffle 302 is disposed inside the baffle 202.

[0040] The sewage discharge component 300 is used to change the shape of the device when the filter plate 201 is subjected to excessive impurities and the water pressure increases, so that the flowing water can wash away the impurities on the filter plate 201.

[0041] Specifically, the pipe 101 is provided with an inlet H1, an outlet H2 and a drain outlet H3. The inlet H1 is located at one end of the top of the pipe 101, and the outlet H2 is located at the other end of the top of the pipe 101. The inlet H1 and the outlet H2 are symmetrically distributed about the drain outlet H3.

[0042] By default, water flows from the inlet H1 to the outlet H2, and the drain outlet H3 is blocked and closed by other parts of the device. The inlet H1 and the outlet H2 are flush, and the drain outlet H3 is located below the middle of the inlet H1 and the outlet H2.

[0043] Specifically, the pipe 101 is also equipped with a translation cavity Q, which is located at the top of the drain outlet H3. The pipe 101 is also equipped with a first arc groove K1, a second arc groove K2, a third arc groove K3, and a fourth arc groove K4. The first arc groove K1 is located at the end of the inlet H1 near the outlet H2, the second arc groove K2 is located at the bottom of the first arc groove K1, the third arc groove K3 is located at the end of the outlet H2 near the inlet H1, and the fourth arc groove K4 is located at the bottom of the third arc groove K3.

[0044] The translation chamber Q is located at both ends of the top of the drain outlet H3, leaving space for adjusting the position of other parts of the device.

[0045] The filter plate 201 can move within the first arc groove K1 and the second arc groove K2. When the filter plate 201 is at the end closest to the water inlet H1, the plate surface of the filter plate 201 faces the water inlet H1. At this time, the water flowing through the filter plate 201 will leave impurities on the filter plate 201. When the filter plate 201 is at the end furthest from the water inlet H1, the plate surface of the filter plate 201 rotates and faces the drain outlet H3. At this time, the water flowing through the filter plate 201 will wash the impurities off the filter plate 201.

[0046] The baffle 202 can move within the No. 3 arc groove K3 and the No. 4 arc groove K4. When the baffle 202 is close to the outlet H2, it faces and blocks the outlet H2, and the water can only flow through the drain outlet H3. When the baffle 202 is close to the drain outlet H3, it will work with other parts of the device to block the drain outlet H3, so that the water can only flow out of the outlet H2.

[0047] The filter plate 201 and the baffle 202 will not be on the same horizontal plane at the same time. Either the filter plate 201 is filtering and the baffle 202 and other parts block the drain outlet H3; or the filter plate 201 is discharging sewage and the baffle 202 blocks the outlet H2.

[0048] Specifically, the bottom of arc groove K1 is connected to the top of arc groove K4, the top of arc groove K2 is connected to the bottom of arc groove K3, the width of arc groove K1 and arc groove K3 is smaller than the width of arc groove K2 and arc groove K4, and the depth of arc groove K1 and arc groove K3 is greater than the depth of arc groove K2 and arc groove K4.

[0049] The width and depth of the arc grooves are set to prevent the second side post 201b and the fourth side post 202b from entering the first arc groove K1 and the third arc groove K3.

[0050] Arc groove No. 2 (K2) and arc groove No. 4 (K4) intersect.

[0051] Specifically, the first square frame 102 is set in the middle of the inner wall of the drain outlet H3, and the bottom of the square spring 103 is attached to the top of the first square frame 102.

[0052] The position of the first box 102 on the inner wall of the drain outlet H3 can be set by an external device. When the position of the first box 102 is higher, more impurities need to be attached to the filter plate 201 in order to adjust the shape of the device.

[0053] When the filter plate 201 and baffle 202 are adjusted due to hydraulic influence, they will press down on the second square frame 104 and compress the square spring 103. The square spring 103 is to prevent the filter plate 201 and baffle 202 from not being at the end of the arc groove, so that the device either filters the water flow or self-cleans the filter plate 201, avoiding reaching a balance in the middle state.

[0054] When in use, at the beginning, the filter plate 201 is facing the water inlet H1, the baffle 202 and other parts are facing and blocking the drain outlet H3, and the water flows from the water inlet H1 to the water outlet H2. At the same time, impurities gradually attach to the filter plate 201.

[0055] After filtering for a period of time, the filtration capacity of filter plate 201 decreases, and the filter plate 201 is subjected to an increasing force from the water flow until it is balanced with the square spring 103. At this time, the external control device lowers the position of the first square frame 102, and the compression force of the square spring 103 decreases. Filter plate 201 moves along the first arc groove K1 and the second arc groove K2. At the same time, the surface of filter plate 201 facing the water inlet H1 turns to the drain outlet H3. Baffle 202 moves along the third arc groove K3 and the fourth arc groove K4, disengages from the drain outlet H3 and blocks the water outlet H2. At this time, it is the sewage discharge mode. The water flow washes down the impurities on filter plate 201 and washes them away from the drain outlet H3.

[0056] After a period of sewage discharge, the filter plate 201 will be cleaned. At this time, push the baffle 202 from the outside of the device and raise the position of the first square 102 to reset the device to the filtration mode.

[0057] To further facilitate operation, a set of square frames and square springs can also be placed at the inner baffle 202 of the outlet H2.

[0058] Example 2

[0059] Reference Figures 1-10 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0060] Specifically, the filter plate 201 is provided with a first side post 201a, a second side post 201b, and a locking key 201c. The first side post 201a is located at one end of the filter plate 201, the second side post 201b is located at the other end of the filter plate 201, and the locking key 201c is located on both sides of the filter plate 201. The two ends of the first side post 201a are engaged with the first arc groove K1, and the two ends of the second side post 201b are directly opposite the second arc groove K2. The filter plate 201 is also provided with a first positioning groove K5 and a second positioning groove K6. The first positioning groove K5 is located on one side of the second side post 201b, and the second positioning groove K6 is located at the bottom of the first positioning groove K5.

[0061] Compared to side post 201b, side post 201a is thinner and longer.

[0062] Specifically, the baffle 202 is provided with a third side post 202a and a fourth side post 202b. The third side post 202a is located at one end of the baffle 202, and the fourth side post 202b is located at the other end of the baffle 202. The two ends of the third side post 202a are engaged with the third arc groove K3, and the two ends of the fourth side post 202b are directly opposite the fourth arc groove K4. The baffle 202 is also provided with a third positioning groove K7, a fourth positioning groove K8, and a telescopic hole H4. The third positioning groove K7 is located on one side of the fourth side post 202b, the fourth positioning groove K8 is located at the bottom of the third positioning groove K7, and the telescopic hole H4 penetrates one side of the baffle 202, the third side post 202a, and the fourth side post 202b.

[0063] Compared to side post 202b, side post 202a is thinner and longer.

[0064] Specifically, the filter assembly 200 also includes a connecting rod 203 and a limiting slide 204. One end of the connecting rod 203 is sleeved on the second side post 201b, and the other end is sleeved on the fourth side post 202b. One end of the connecting rod 203 cooperates with the second positioning groove K6, and the other end cooperates with the fourth positioning groove K8. There are two limiting slides 204, which include a limiting frame 204a and a limiting block 204b. One end of the limiting frame 204a cooperates with the end of the second side post 201b, and the other end cooperates with the end of the fourth side post 202b. One limiting block 204b cooperates with the second arc groove K2, and the other limiting block 204b cooperates with the fourth arc groove K4.

[0065] The connecting rod 203 ensures that when one of the filter plate 201 and the baffle 202 is adjusted by force, the other will adjust accordingly.

[0066] One end of the limiting slide 204 is sleeved with the thick edge post, and the other end is stuck in the thick arc groove. The length of the limiting slide 204 is greater than the top length of the intersection of the second arc groove K2 and the fourth arc groove K4. This can prevent the thick edge post from entering another thick arc groove at the intersection.

[0067] Specifically, the telescopic filter element 301 includes a first fixing plate 301a, a first fixing spring 301b, and a half filter plate 301c. The first fixing plate 301a is located in the middle of the filter plate 201, and both ends of the first fixing plate 301a are fixed to the middle of the key 201c. There are two first fixing springs 301b, which are located on both sides of the first fixing plate 301a. The half filter plate 301c is located at the end of the first fixing spring 301b away from the first fixing plate 301a.

[0068] The telescopic filter element 301 is attached to the filter plate 201. When the filter plate 201 faces the drain outlet H3, the telescopic filter element 301 unfolds to speed up the draining process.

[0069] Specifically, the telescopic baffle 302 includes a second fixed plate 302a, a second fixed spring 302b, a first half baffle 302c, and a second half baffle 302d. The second fixed plate 302a is located in the middle section of the telescopic hole H4. There are two second fixed springs 302b, which are located on both sides of the second fixed plate 302a. The first half baffle 302c is located at the end of the second fixed spring 302b near the water inlet H1, and the end of the first half baffle 302c is attached to the second side post 201b. The second half baffle 302d is located at the end of the second fixed spring 302b near the water outlet H2, and the end of the second half baffle 302d is attached to the top of the translation cavity Q.

[0070] The telescopic baffle 302 is inserted into the baffle 202. When the telescopic baffle 302 faces the drain outlet H3, the telescopic baffle 302 unfolds, and the two half baffles and the baffle 202 block the drain outlet H3 to prevent water leakage from the drain outlet H3.

[0071] When in use, at the beginning, the filter plate 201 is facing the water inlet H1, the baffle 202 and other parts are facing and blocking the drain outlet H3, and the water flows from the water inlet H1 to the water outlet H2. At the same time, impurities gradually attach to the filter plate 201.

[0072] After filtration for a period of time, the filtration capacity of filter plate 201 decreases, and the filter plate 201 is subjected to increasing force from the water flow until it is balanced with the square spring 103. At this time, the external control device lowers the position of the first square frame 102, and the compression force of the square spring 103 decreases. The first side post 201a of filter plate 201 moves along the first arc groove K1, and the second side post 201b moves along the second arc groove K2 through the limiting slide 204. At the same time, the filter plate 201 turns the face facing the inlet H1 to the drain outlet H3. The third side post 202a of baffle 202 moves along the third arc groove K3, and the fourth side post 202b moves along the fourth arc groove K4 through the limiting slide 204, disengaging from the drain outlet H3 and blocking the outlet H2. At this time, it is the sewage discharge mode. The water flow washes down the impurities on the filter plate 201 and washes them away from the drain outlet H3.

[0073] After a period of sewage discharge, the filter plate 201 will be cleaned. At this time, push the baffle 202 from the outside of the device and raise the position of the first square 102 to reset the device to the filtration mode.

[0074] This cleans the filter plate 201 with water flow, eliminating the need to remove it and greatly saving labor.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-cleaning filter device, characterized in that: include, The water-passing assembly (100) includes a through pipe (101), a square spring (103), a first square frame (102), and a second square frame (104). The square spring (103) is disposed inside the bottom end of the through pipe (101), the first square frame (102) is disposed at the bottom of the square spring (103), and the second square frame (104) is fixed to the top of the square spring (103). A filter assembly (200), disposed inside the water-passing assembly (100), includes a filter plate (201), a baffle (202), a connecting rod (203), and a limiting slide (204). The filter plate (201) is disposed at one end of the through pipe (101), the baffle (202) is disposed at the other end of the through pipe (101), and the connecting rod (203) connects the baffle (202) and the filter plate (201); and, A sewage discharge assembly (300) is disposed on one side of the filter assembly (200) and includes a telescopic filter element (301) and a telescopic baffle (302). The telescopic filter element (301) is disposed on one side of the filter plate (201), and the telescopic baffle (302) is disposed inside the baffle (202). The pipe (101) is provided with an inlet (H1), an outlet (H2) and a drain outlet (H3). The inlet (H1) is located at one end of the top of the pipe (101), and the outlet (H2) is located at the other end of the top of the pipe (101). The inlet (H1) and the outlet (H2) are symmetrically distributed about the drain outlet (H3). The connecting pipe (101) is also provided with a translation cavity (Q), which is located at the top of the sewage outlet (H3). The connecting pipe (101) is also provided with a first arc groove (K1), a second arc groove (K2), a third arc groove (K3), and a fourth arc groove (K4). The first arc groove (K1) is located at the end of the inlet (H1) near the outlet (H2). The second arc groove (K2) is located at the bottom of the first arc groove (K1). The third arc groove (K3) is located at the end of the outlet (H2) near the inlet (H1). The fourth arc groove (K4) is located at the bottom of the third arc groove (K3). The bottom of the first arc groove (K1) and the top of the fourth arc groove (K4) are connected, the top of the second arc groove (K2) and the bottom of the third arc groove (K3) are connected, the width of the first arc groove (K1) and the third arc groove (K3) is smaller than the width of the second arc groove (K2) and the fourth arc groove (K4), and the depth of the first arc groove (K1) and the third arc groove (K3) is greater than the depth of the second arc groove (K2) and the fourth arc groove (K4); The filter plate (201) is provided with a first side post (201a), a second side post (201b), and a locking key (201c). The first side post (201a) is located at one end of the filter plate (201), the second side post (201b) is located at the other end of the filter plate (201), and the locking key (201c) is located on both sides of the filter plate (201). The two ends of the first side post (201a) are engaged with the first arc groove (K1), and the two ends of the second side post (201b) are directly opposite the second arc groove (K2). The filter plate (201) is also provided with a first positioning groove (K5) and a second positioning groove (K6). The first positioning groove (K5) is located on one side of the second side post (201b), and the second positioning groove (K6) is located at the bottom of the first positioning groove (K5). The baffle (202) is provided with a third side post (202a) and a fourth side post (202b). The third side post (202a) is located at one end of the baffle (202), and the fourth side post (202b) is located at the other end of the baffle (202). The two ends of the third side post (202a) are engaged with the third arc groove (K3), and the two ends of the fourth side post (202b) are directly opposite the fourth arc groove (K4). The baffle (202) is also provided with a third positioning groove (K7), a fourth positioning groove (K8) and a telescopic hole (H4). The third positioning groove (K7) is located on one side of the fourth side post (202b), the fourth positioning groove (K8) is located at the bottom of the third positioning groove (K7), and the telescopic hole (H4) penetrates one side of the baffle (202), the third side post (202a) and the fourth side post (202b).

2. The self-cleaning filter device as described in claim 1, characterized in that: The first square frame (102) is positioned in the middle of the inner wall of the drain outlet (H3), and the bottom of the square spring (103) is attached to the top of the first square frame (102).

3. The self-cleaning filter device as described in claim 2, characterized in that: The filter assembly (200) further includes a connecting rod (203) and a limiting slide (204). One end of the connecting rod (203) is sleeved on the second side post (201b), and the other end is sleeved on the fourth side post (202b). One end of the connecting rod (203) cooperates with the second positioning groove (K6), and the other end cooperates with the fourth positioning groove (K8). There are two limiting slides (204). The limiting slide (204) includes a limiting frame (204a) and a limiting block (204b). One limiting frame (204a) cooperates with the end of the second side post (201b), and the other limiting frame (204a) cooperates with the end of the fourth side post (202b). One limiting block (204b) cooperates with the second arc groove (K2), and the other limiting block (204b) cooperates with the fourth arc groove (K4).

4. The self-cleaning filter device as described in claim 3, characterized in that: The telescopic filter element (301) includes a first fixing plate (301a), a first fixing spring (301b), and a half filter plate (301c). The first fixing plate (301a) is located in the middle of the filter plate (201), and both ends of the first fixing plate (301a) are fixed to the middle of the key (201c). There are two first fixing springs (301b), which are located on both sides of the first fixing plate (301a). The half filter plate (301c) is located at the end of the first fixing spring (301b) away from the first fixing plate (301a).

5. The self-cleaning filter device as described in claim 3 or 4, characterized in that: The telescopic stop (302) includes a second fixed plate (302a), a second fixed spring (302b), a first half-stop (302c), and a second half-stop (302d). The second fixed plate (302a) is located in the middle section of the telescopic hole (H4). There are two second fixed springs (302b), which are located on both sides of the second fixed plate (302a). The first half-stop (302c) is located at the end of the second fixed spring (302b) near the inlet (H1), and the end of the first half-stop (302c) is in contact with the second side post (201b). The second half-stop (302d) is located at the end of the second fixed spring (302b) near the outlet (H2), and the end of the second half-stop (302d) is in contact with the top of the translation cavity (Q).

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