A multi-stage adjustable filter

Abstract

The invention discloses a multi-speed adjustable filter, which relates to the technical field of filters. In order to solve the problem that the existing filter is inconvenient to use and cannot observe the filter bottle pressure in real time, the multi-speed adjustable filter comprises a filter body, a filter end cover which is detachably arranged on the top of the filter body, a water inlet, a water outlet and a sewage outlet are arranged on the filter end cover, a circumferentially rotatable reversing valve is arranged in the filter end cover, the reversing valve has four gears to correspond to four working states of the filter body, the circumferential rotation of a handle is used to switch the gears of the reversing valve, and a limiting structure for limiting the maximum angle of the circumferential rotation of the handle is arranged on the handle, the filter end cover is provided with a block cooperating with the limiting structure, the handle is provided with a detachable long handle, and a pressure gauge is plugged into the filter end cover to measure the pressure in the filter body.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and more particularly to a multi-stage adjustable filter. Background Art

[0002] Urban water supply pipelines are old and long. Rust, silt, and other impurities can cause malfunctions in water-using equipment, necessitating the installation of filtration devices on these devices. A pre-filter is the first coarse filter for household water, filtering out silt, rust, and large particles from tap water. This prevents harmful effects from the large amounts of sediment and impurities generated in urban and residential water supply networks. It also provides proactive protection for concealed pipes, faucets, plumbing fixtures, water heaters, boilers, central air conditioners, washing machines, dishwashers, coffee machines, and other water appliances (water purifiers, pure water machines, and water softeners).

[0003] Filters currently on the market with four-speed switching capabilities generally have several shortcomings. Their switching angle is typically 360 degrees, with each gear shifting at 90 degrees. This wide angle creates numerous operational inconveniences. For example, users require a significant amount of space and force to switch gears, increasing difficulty and fatigue. Furthermore, this wide switching angle can lead to imprecise operation, making it difficult to meet users' precise requirements for specific filtering functions. Furthermore, these filters lack pressure gauges, which interfere with the pressure gauge during gear shifting, preventing users from observing the filter cartridge's status in real time. The status of the filter cartridge is crucial to filtration effectiveness and the proper operation of the equipment. Failure to promptly monitor the pressure in the cartridge can lead to poor filtration results, equipment damage, and other issues, causing unnecessary inconvenience and loss for users.

[0004] Therefore, how to solve the problem that the existing filter is inconvenient to use and cannot observe the filter bottle pressure in real time is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a multi-speed adjustable filter that can monitor the pressure changes during the filtration process in real time, provide users with accurate operating parameters, and adopt a small-angle gear switching design to make operation easier, more convenient and more accurate.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-stage adjustable filter, comprising:

[0008] filter body;

[0009] The filter end cover is detachably mounted on the top of the filter body. The filter end cover is provided with a water inlet, a water outlet and a sewage outlet. A rotatable reversing valve is provided inside the filter end cover. The reversing valve has four gears to correspond to the four working states of the filter body.

[0010] The handle is connected to the reversing valve by a clamping connection. The circumferential rotation of the handle is used to switch the gear position of the reversing valve. The handle is provided with a limit structure for limiting the maximum angle of the circumferential rotation of the handle. The filter end cover is provided with a block that cooperates with the limit structure. The handle is provided with a detachable long handle;

[0011] The pressure gauge is plugged into the filter end cover to measure the pressure inside the filter body.

[0012] Preferably, the reversing valve includes a valve body and a valve core. The valve body is rotatably mounted on the outer periphery of the valve core. The valve core is fixed in the filter end cover. The valve core is circumferentially provided with symmetrical inlets and outlets. The outer periphery of the valve core is provided with two annular grooves for installing seals. The annular grooves are provided on both sides of the inlet and outlet. A water outlet is also provided at the bottom of the valve core.

[0013] Preferably, the valve body is a hollow cylindrical structure, and a sealing ring is provided on the outer periphery of the valve body to seal the valve body and the filter end cover. The valve body has a first channel that can connect the water inlet with the inner cavity of the filter body by rotation, and also has a second channel that can directly connect the water inlet and the water outlet by rotation. It also has a stop structure that can block both the water inlet and the water outlet by rotation, and also has a third channel that can connect the water inlet with the sewage outlet and block the water outlet by rotation.

[0014] Preferably, the valve body includes an inner tube and an outer tube coaxially arranged, and a sandwich channel is formed between the inner tube and the outer tube. The sandwich channel is provided with a partition to divide the sandwich channel into an upper space and a lower space. The upper space and the lower space are both provided with spoke-type partition plates.

[0015] Preferably, the first channel includes a first through hole connected to the water inlet and a second through hole connected to the water outlet. The first through hole and the second through hole are symmetrically arranged in the circumference of the outer tube. The first through hole is connected to the lower space, and the second through hole is connected to the internal space of the inner tube through the water outlet channel of the first channel. The outer circumferences of the first through hole and the second through hole are both provided with grooves for installing sealing rings.

[0016] Preferably, the second channel is arranged on the outer periphery of the outer tube, and the outer periphery of the outer tube is also provided with a groove body surrounding the second channel, and a sealing ring is provided in the groove body. The second channel includes a first docking groove docking with the water inlet and a second docking groove docking with the water outlet. The first docking groove and the second docking groove are symmetrically arranged on the circumference of the outer tube, and the first docking groove and the second docking groove are connected through the annular water groove of the second channel.

[0017] Preferably, the third channel includes a third through hole docked with the water inlet and a stop structure for sealing the water outlet. The third through hole and the stop structure are symmetrically arranged in the circumference of the outer tube. The third through hole is connected with the internal space of the inner tube through the water inlet channel of the third channel. The outer periphery of the third through hole and the stop structure are provided with grooves for installing a sealing ring.

[0018] Preferably, a limit piece is provided on the filter end cover, an annular limit groove is provided circumferentially on the top of the valve body, the limit piece is provided in the annular limit groove, a plurality of card grooves extending along the axial direction of the valve body are provided in the annular limit groove, and the card grooves extend to the top of the valve body, and the bottom end of the handle is provided with a card foot that is engaged with the card groove.

[0019] Preferably, both the valve body and the long handle are provided with fool-proof structures, the top surface of the handle is provided with an indicator arrow pointing to the current gear state of the reversing valve, and the long handle is provided with a plurality of through holes for displaying the indicator arrows.

[0020] Preferably, the filter body includes a filter bottle and a filter element disposed in the filter bottle, the filter element and the valve core are sealed, the filter end cover is threadedly connected to the filter bottle, and a fixing bracket is provided on the filter end cover.

[0021] The multi-speed adjustable filter provided by the present invention includes a filter body, a filter end cover, a handle and a pressure gauge. Specifically, the filter end cover is detachably arranged on the top of the filter body, and the filter end cover is provided with a water inlet, a water outlet and a sewage outlet. When the filter is used for filtering, water enters the inner cavity of the filter body through the water inlet, and the clean filtered water after cleaning the inner cavity of the filter body is discharged from the water outlet, and impurities are retained in the inner cavity of the filter body. When the filter body is backwashed, the impurities in the filter body are washed away by the water and discharged from the sewage outlet.

[0022] A rotatable reversing valve is located within the filter end cap. A handle is snap-connected to the reversing valve. Rotation of the handle switches the valve's gear position. By rotating the handle slightly, the valve's gear position can be switched, thereby changing the filter's operating state, making operation easier, more convenient, and more precise. The reversing valve has four gear positions, corresponding to the filter's four operating states. Each rotation of the handle shifts a gear, driving the reversing valve to rotate by the same angle, switching the valve from one operating state to another. The reversing valve can be freely switched between the four operating states by rotating the handle forward and backward. The handle is also equipped with a limiter structure to limit the maximum angle of circumferential rotation of the handle. The filter end cap is equipped with a stopper that cooperates with the limiter structure. The limiter structure and the stopper cooperate to limit the maximum angle of circumferential rotation of the handle. The handle also features a detachable extended handle that can be snapped onto the handle for ease of use.

[0023] Moreover, the small-angle switching design can make room for installing a pressure gauge. The pressure gauge is plugged into the filter end cover to monitor the pressure inside the filter body in real time, allowing users to understand the working conditions of the filter at any time, discover and solve possible problems in a timely manner, and ensure the stability and reliability of the filtering effect.

[0024] The multi-speed adjustable filter set up in the above manner has more flexible adjustment performance and reliable monitoring function. The gear switching of the filter can be achieved by rotating the handle at a small angle, making the operation easier, more convenient and more accurate, meeting the usage needs in different scenarios. At the same time, the filter is equipped with a pressure gauge, which can monitor the pressure changes during the filtration process in real time, promptly discover and solve possible problems, and ensure the stability and reliability of the filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the multi-stage adjustable filter provided by the present invention;

[0027] Figure 2 This is an exploded view of the multi-stage adjustable filter provided by the present invention;

[0028] Figure 3 A partial exploded view of the multi-stage adjustable filter provided by the present invention;

[0029] Figure 4 This is a schematic structural diagram of the filter end cap provided by the present invention;

[0030] Figure 5 A cross-sectional view of the multi-stage adjustable filter provided by the present invention;

[0031] Figure 6 A cross-sectional view of the multi-stage adjustable filter provided by the present invention from another perspective;

[0032] Figure 7 This is a schematic structural diagram of the valve core provided by the present invention;

[0033] Figure 8 This is a schematic structural diagram of the valve body provided by the present invention;

[0034] Figure 9 A schematic structural diagram of the handle provided by the present invention;

[0035] Figure 10 This is a schematic structural diagram of the long handle provided by the present invention.

[0036] Reference numerals:

[0037] 1-filter body, 11-filter bottle, 12-filter element;

[0038] 2-filter end cap, 21-water inlet, 22-water outlet, 23-sewage outlet;

[0039] 3- reversing valve, 31- valve body, 311- first channel, 312- second channel, 313- stop structure, 314- third channel, 315- annular limiting groove, 316- clamping groove, 32- valve core, 321- inlet, 322- outlet, 323- annular groove;

[0040] 4-handle, 41-indicator arrow, 42-clamp foot;

[0041] 5-pressure gauge;

[0042] 6-sealing ring;

[0043] 7-Limiting parts;

[0044] 8-long handle, 81-clip, 82-through hole;

[0045] 9-Fixed bracket;

[0046] 10-Stop. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] It should be noted that the directional words such as "upper" and "lower" below are defined based on the drawings in the specification.

[0050] The core of the present invention is to provide a multi-speed adjustable filter that can monitor the pressure changes during the filtration process in real time, provide users with accurate operating parameters, and adopt a small-angle gear switching design to make operation easier, more convenient and more accurate.

[0051] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A multi-speed adjustable filter includes a filter body 1, a filter end cover 2, a reversing valve 3, a handle 4 and a pressure gauge 5.

[0052] The filter body 1 includes a filter bottle 11 and a filter element 12 disposed within the filter bottle 11. The filter element 12 is sealedly connected to the valve core 32, and the filter end cap 2 is threadedly connected to the filter bottle 11. The filter element 12 is placed within the filter bottle 11, the sealing ring 6 is positioned on the filter bottle 11, and the filter end cap 2 is mounted on the filter bottle 11, forming a sealed space. In other words, the internal space of the filter bottle 11 is divided by the filter element 12 into two parts: the interior of the filter element 12 and the exterior of the filter element 12 (the space between the outer wall of the filter element 12 and the inner wall of the filter bottle 11). The other specific structures and connection relationships of the filter body 1 are referred to in the prior art and are not the focus of this application and will not be discussed in detail herein.

[0053] Specifically, the filter end cover 2 is detachably arranged on the top of the filter body 1, and is provided with a water inlet 21, a water outlet 22 and a sewage outlet 23 on the filter end cover 2. When the filter is used for filtering, the water first enters the outside of the filter element 12 through the water inlet 21, and then enters the inside of the filter element 12. At the same time, impurities are left outside the filter element 12. The clean filtered water after cleaning the inner cavity of the filter body 1 is discharged from the water outlet 22. When the filter body 1 is backwashed, the water first enters the inside of the filter element 12 through the water inlet 21, and then enters the outside of the filter element 12, flushing out the impurities outside the filter element 12 and discharging them from the sewage outlet 23.

[0054] A circumferentially rotatable reversing valve 3 is provided in the filter end cover 2, and a handle 4 is snap-connected to the reversing valve 3. The circumferential rotation of the handle 4 is used to switch the gear position of the reversing valve 3. By rotating the handle 4 at a small angle, the gear position of the reversing valve 3 can be switched, thereby changing the operating state of the filter body 1, making the operation easier, more convenient and more precise. The reversing valve 3 has four gear positions to correspond to the four working states of the filter body 1, and the reversing valve 3 switches back and forth between the four gear positions. Each rotation of the handle 4 switches a gear, driving the reversing valve 3 to rotate at the same angle, so that the reversing valve 3 switches from one working state to another. By rotating the handle 4 forward and reverse, the reversing valve 3 can be freely switched between the four working states. The handle 4 is provided with a limiting structure for limiting the maximum angle of circumferential rotation of the handle 4. The filter end cover 2 is provided with a stopper 10 that cooperates with the limiting structure. The maximum angle of circumferential rotation of the handle 4 is limited by the cooperation between the limiting structure and the stopper 10. The handle 4 is provided with a detachable long handle 8. For ease of use, the long handle 8 can be snapped onto the handle 4.

[0055] In order to make the reversing valve 3 switch gears more accurately and avoid the problem of excessive rotation angle or insufficient rotation angle, a buckle is provided on the inner wall of the filter end cover 2 to indicate that the reversing valve 3 has switched gears. At the same time, a slot for engaging with the buckle is provided at a position corresponding to the gear on the outer periphery of the reversing valve 3, so that each time the reversing valve 3 switches a gear, the buckle will engage with the slot corresponding to the gear.

[0056] Moreover, the design of small-angle switching can make space for installing the pressure gauge 5. The pressure gauge 5 is plugged into the top of the filter end cover 2 and is used to monitor the pressure conditions in the filter body 1 in real time, so that the user can understand the working conditions of the filter at any time, discover and solve possible problems in time, and ensure the stability and reliability of the filtering effect.

[0057] The drain port 23 and the socket for installing the pressure gauge 5 are both equipped with quick-connect connectors to facilitate the quick connection and use of the pressure gauge 5 and the drain pipe. The water inlet 21 and the water outlet 22 are connected to other devices through threads. The threads are of two types and are interchangeable: one is an integrated thread and the other is an insert.

[0058] In this embodiment, the handle 4 is provided with an indicator arrow 41 for indicating the gear position. Every time the handle 4 is rotated 45 degrees, the indicator arrow 41 is driven to rotate at the same angle, and the reversing valve 3 switches the gear position once. The four gear positions total 135 degrees. Among them, there is no restriction on the switching angle of any gear position, and it can be 10 degrees, 20 degrees, 30 degrees, etc., as long as the technical effect of switching gears at a small angle can be achieved.

[0059] The handle 4 is provided with a limit structure for limiting the maximum circumferential rotation angle of the handle 4. This limit structure limits the maximum circumferential rotation angle of the handle 4. When the reversing valve 3 requires a 45-degree handle rotation for each gear change, the angle between the two limit structures is 135 degrees. The filter end cap 2 is provided with two stops 10, with the angle between the two stops 10 being 135 degrees. When the filter bottle 11 is in the filtering gear and the stop gear, the limit structure on the handle 4 abuts the stop 10 on the filter end cap 2 to prevent excessive rotation of the handle 4.

[0060] The multi-speed adjustable filter set up in the above manner has more flexible adjustment performance and reliable monitoring function. By rotating the handle 4 at a small angle, the gear switching of the filter is achieved, making the operation easier, more convenient and more accurate, meeting the usage requirements in different scenarios. At the same time, the filter is equipped with a pressure gauge 5, which can monitor the pressure changes during the filtration process in real time, promptly discover and solve possible problems, and ensure the stability and reliability of the filtration effect.

[0061] Please refer to Figure 5 、 Figure 6 and Figure 7 The reversing valve 3 includes a valve body 31 and a valve core 32. The valve body 31 is rotatably sleeved on the outer periphery of the valve core 32. The valve core 32 is fixed in the filter end cover 2. The valve core 32 is circumferentially provided with a symmetrical inlet 321 and outlet 322. The outer periphery of the valve core 32 is provided with two annular grooves 323 for installing seals. The annular grooves 323 are provided on both sides of the inlet 321 and the outlet 322. A water outlet is also provided at the bottom of the valve core 32.

[0062] It should be noted that by rotating the handle 4, the valve body 31 of the reversing valve 3 is driven to rotate synchronously, and the valve core 32 is fixed in the filter end cover 2. Therefore, the valve body 31 rotates relative to the valve core 32. When the valve body 31 is rotated until the water inlet 21 of the valve body 31 is connected with the sewage outlet 23, the gear position of the filter bottle 11 is in the backwash gear. The water enters the interior of the valve core 32 from the water inlet 21 through the inlet 321 of the valve core 32, and then enters the interior of the filter element 12 from the interior of the valve core 32, and enters the outside of the filter element 12 from the inside of the filter element 12, flushes out the impurities outside the filter element 12, and exits from the sewage outlet 23.

[0063] When switched to the filtering gear, the outlet 322 of the valve core 32 is connected to the water outlet 22 of the filter end cover 2; when switched to the backwash gear, the inlet 321 of the valve core 32 is connected to the water inlet 21 of the filter end cover 2; the valve core 32 is only responsible for water intake but not water discharge; that is, the outlet 322 of the valve core 32 is blocked, and the water port at the bottom of the valve core 32 is responsible for connecting with the interior of the filter element 12; the water entering the filter element 12 through the valve core 32 flows out from the outside of the filter element 12, and is finally discharged from the drain outlet 23.

[0064] Please refer to Figure 8 The valve body 31 is a hollow cylindrical structure. A sealing ring 6 is provided on the outer periphery of the valve body 31 to seal the valve body 31 and the filter end cover 2. The valve body 31 has a first channel 311 that can connect the water inlet 21 with the inner cavity of the filter body 1 by rotation, and a second channel 312 that can directly connect the water inlet 21 and the water outlet 22 by rotation. It also has a stop structure 313 that can block both the water inlet 21 and the water outlet 22 by rotation, and a third channel 314 that can connect the water inlet 21 with the sewage outlet 23 and block the water outlet 22 by rotation.

[0065] It is understood that the sealing ring 6 is provided on the outer periphery of the valve body 31 to seal the valve body 31 and the inner wall of the filter end cap 2, thereby preventing water from entering the gap between the outer periphery of the valve body 31 and the filter end cap 2 and causing water leakage. The first channel 311, the second channel 312, the third channel 314 and the stop structure 313 are all sealed by the sealing ring 6 to prevent water leakage and water cross-contamination between the water channels.

[0066] In the initial state, the filter is in a stopped state. When the filter needs to be used, the handle 4 is rotated to drive the valve body 31 of the reversing valve 3 to rotate synchronously. Each rotation rotates the handle 4 45 degrees to switch a gear. When it is rotated 135 degrees counterclockwise and switched to the filtering gear, the water inlet 21 is connected to the first channel 311 of the valve body 31. Water enters the first channel 311 of the valve body 31 from the water inlet 21, then enters the outside of the filter element 12, then enters the inside of the filter element 12 from the outside of the filter element 12, then enters the inside of the valve core 32, and then passes through the outlet 322 of the valve core 32 directly to the water outlet 22.

[0067] When the filter switches from the filtering state to the bypass state, it is only necessary to rotate the handle 4 45 degrees clockwise to switch to the second channel 312 directly connected to the water inlet 21 and the water outlet 22. The water enters the second channel 312 from the water inlet 21 and exits through the water outlet 22.

[0068] When the filter switches from the bypass state to the backwash state, it is only necessary to rotate the handle 4 45 degrees clockwise to switch to the gear state in which the water inlet 21 is connected to the third channel 314 and the water outlet 22 is blocked. Water enters the interior of the valve core 32 from the water inlet 21 through the inlet 321 of the valve core 32, then enters the interior of the filter element 12 from the interior of the valve core 32, and enters the outside of the filter element 12 from the inside of the filter element 12, flushes out impurities on the outside of the filter element 12, and exits from the sewage outlet 23.

[0069] When the filter switches from the backwash state to the stop state, it only needs to rotate the handle 4 45 degrees clockwise to switch to the state where both the water inlet 21 and the water outlet 22 are blocked. At this time, the stop structure 313 of the valve body 31 corresponds to the water inlet 21 and the water outlet 22 to achieve the blocking of the water inlet 21 and the water outlet 22, and stop the water inlet and outlet of the filter bottle 11.

[0070] In the above case, the valve body 31 includes an inner tube and an outer tube that are coaxially sleeved, and a sandwich channel is formed between the inner tube and the outer tube. The sandwich channel is provided with a partition to divide the sandwich channel into an upper space and a lower space. The upper space and the lower space are both provided with spoke-type partition plates to increase the overall strength.

[0071] In this embodiment, the upper space is evenly divided into four compartments, and the lower space is evenly divided into five compartments, wherein the first through hole of the first channel 311 is connected to the lower space, so that the water entering the valve body 31 from the first through hole directly passes through the lower space into the outside of the filter element 12; the second through hole is directly connected to the internal space of the inner cylinder through the water outlet channel of the first channel 311, so that when the reversing valve 3 is in the filtering state, the filtered water is directly discharged from the outlet 322 of the valve core 32 through the water outlet channel of the first channel 311 and the second through hole from the water outlet 22; the third through hole is connected to the internal space of the inner cylinder through the water inlet channel of the third channel 314, so that when the reversing valve 3 is in the backwashing state, the water directly enters the interior of the valve core 32 from the water inlet 21 through the inlet 321 of the valve core 32 and the water inlet channel of the third channel 314 from the third through hole.

[0072] Among them, the water outlet channel and the water inlet channel are both arranged in the lower space and penetrate the compartment, so that water can flow out directly through the water outlet channel or flow in through the water inlet channel.

[0073] Furthermore, the first channel 311 includes a first through hole connected to the water inlet 21 and a second through hole connected to the water outlet 22. The first through hole and the second through hole are symmetrically arranged in the circumference of the outer tube. The first through hole is connected to the lower space, and the second through hole is connected to the internal space of the inner tube through the water outlet channel of the first channel 311. The outer circumferences of the first through hole and the second through hole are both provided with grooves for installing the sealing ring 6.

[0074] It should be noted that when the filter is switched to the filtering position, the water inlet 21 is connected to the first through hole of the first channel 311, and the water outlet 22 is connected to the second through hole of the first channel 311. Water flows from the water inlet 21 through the first through hole and the compartment to the outside of the filter element 12, then from the outside of the filter element 12 into the inside of the filter element 12, then into the inside of the valve core 32, and finally through the outlet 322 of the valve core 32, the water outlet channel, the second through hole, and directly to the water outlet 22. Sealing rings 6 are provided on the outer peripheries of the first through hole and the second through hole to seal the first through hole and the second through hole, thereby preventing water from flowing out from the position where the first through hole connects with the water inlet 21 and the position where the second through hole connects with the water outlet 22.

[0075] In the above embodiment, the second channel 312 is arranged on the outer periphery of the outer tube, and the outer periphery of the outer tube is also provided with a groove body surrounding the second channel 312, and a sealing ring 6 is provided in the groove body. The second channel 312 includes a first docking groove docking with the water inlet 21 and a second docking groove docking with the water outlet 22. The first docking groove and the second docking groove are symmetrically arranged on the circumference of the outer tube, and the first docking groove and the second docking groove are connected through the annular water groove of the second channel 312.

[0076] It can be understood that when the filter switches from the filtering state to the bypass state, it is only necessary to rotate the handle 4 45 degrees clockwise to switch to the second channel 312 directly connected to the water inlet 21 and the water outlet 22. At this time, the water inlet 21 is connected to the first docking groove, and the water outlet 22 is connected to the second docking groove, and the entire second channel 312 is sealed by the sealing ring 6, so that water can only flow in the second channel 312, and there will be no water leakage. The water enters the first docking groove from the water inlet 21, flows through the annular water groove to the second docking groove, and is discharged from the water outlet 22 at the second docking groove.

[0077] The first docking groove, the annular water groove and the second docking groove are all arranged on the outer periphery of the outer cylinder so that water can only flow around the outer periphery of the outer cylinder.

[0078] Based on the above embodiment, the third channel 314 includes a third through hole connected to the water inlet 21 and a stop structure 313 for sealing the water outlet 22. The third through hole and the stop structure 313 are symmetrically arranged on the circumference of the outer cylinder. The third through hole is connected to the internal space of the inner cylinder through the water inlet channel of the third channel 314. The outer periphery of the third through hole and the stop structure 313 are provided with a groove for installing the sealing ring 6.

[0079] It should be noted that when the filter is switched from the bypass state to the backwash state, it is only necessary to rotate the handle 4 45 degrees clockwise to switch to the third channel 314 in which the water inlet 21 is connected to the sewage outlet 23 and the water outlet 22 is blocked. At this time, the water inlet 21, the third through hole, the water inlet channel and the inlet 321 of the valve core 32 are connected, the stop structure 313 blocks the water outlet 22, and the sealing ring 6 is used to seal the entire third channel 314. Water enters the interior of the valve core 32 from the water inlet 21, the third through hole, the water inlet channel and the inlet 321 of the valve core 32, and then enters the interior of the filter element 12 from the interior of the valve core 32, and enters the outside of the filter element 12 from the inside of the filter element 12 to flush out impurities on the outside of the filter element 12. At this time, the water outlet 22 is in a blocked state so that sewage can only be discharged from the sewage outlet 23.

[0080] Please refer to Figure 9 A limit member 7 is provided on the filter end cover 2, and an annular limit groove 315 is provided circumferentially on the top of the valve body 31. The limit member 7 is arranged in the annular limit groove 315. A plurality of card grooves 316 extending along the axial direction of the valve body 31 are provided in the annular limit groove 315, and the card groove 316 extends to the top of the valve body 31. The bottom end of the handle 4 is provided with a card foot 42 that is engaged with the card groove 316.

[0081] It can be understood that by setting the limit member 7, the connection between the filter end cover 2 and the valve body 31 is achieved, and by setting the card groove 316, the card foot 42 of the handle 4 is engaged to achieve the connection between the handle 4 and the valve body 31. By rotating the handle 4 to drive the rotation of the valve body 31, the different gears of the valve body 31 are switched to achieve the switching of different working states of the filter.

[0082] Please refer to Figure 10 The valve body 31 and the long handle 8 are both provided with fool-proof structures. The top surface of the handle 4 is provided with an indicator arrow 41 pointing to the current gear state of the reversing valve 3, and the long handle 8 is provided with a through hole 82 for displaying the indicator arrow 41.

[0083] It should be noted that, for ease of use, a long handle 8 can be installed on the handle 4. The handle 4 can be accurately installed on the valve body 31 through the fool-proof structure, and the long handle 8 can be accurately installed on the handle 4 through the fool-proof structure. By providing the fool-proof structure on the valve body 31 and the handle 4, the handle 4 and the long handle 8 can be correctly installed. By providing a clamping foot 42 at the bottom end of the handle 4 and a clamping groove that cooperates with the clamping foot 42 at the top end of the valve body 31, the handle 4 and the valve body 31 are clamped and fixed. By providing a buckle 81 at the bottom end of the long handle 8 and a clamping groove that engages with the buckle 81 at the top end of the handle 4, the handle 4 and the long handle 8 are clamped and fixed.

[0084] When the long handle 8 is installed, the through hole 82 on the long handle 8 corresponds to the indicator arrow 41 on the handle 4, indicating the filter's gear status. There are four gears for reversing: filter, bypass, backwash, and stop. The position indicated by the indicator arrow 41 on the handle 4 indicates the current filter mode.

[0085] During installation, first insert the valve body 31 from the bottom of the filter end cover 2. After the valve body 31 is in place, put the limiter 7 into the filter end cover 2 to fix the valve body 31. Fix the valve core 32 to the filter end cover 2 and fix it with screws. The valve core 32 has an anti-foolproof function and needs to be installed correctly. Finally, install the long handle 8 on the handle 4. It can be installed on the handle 4 in any direction. There are multiple round holes on the long handle 8, which can display the arrow on the handle 4 and have an anti-foolproof function. The long handle 8 is optional. It can be installed when needed and removed when not needed without affecting the overall appearance.

[0086] In the above case, a fixing bracket 9 is provided on the filter end cover 2 .

[0087] It is understandable that by providing the fixing bracket 9, the filter can be fixed in different working environments to be suitable for different working occasions.

[0088] In summary, the multi-level adjustable filter provided by the present invention utilizes a narrow-angle shifting design, with each shifting angle being only 45 degrees. This significantly reduces the switching angle, making operation easier, more convenient, and more precise. Users can more accurately select the desired filtration level to meet the needs of different scenarios. The filter is also equipped with a pressure gauge 5 that displays the pressure status of the filter bottle 11 in real time, allowing users to monitor the filter's operating status at all times, identify and resolve potential problems promptly, and ensure the stability and reliability of the filtration effect.

[0089] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0090] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above describes in detail the multi-stage adjustable filter provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A multi-stage adjustable filter, characterized in that: include: Filter body (1); A filter end cover (2) is detachably arranged on the top of the filter body (1), the filter end cover (2) is provided with a water inlet (21), a water outlet (22) and a sewage outlet (23), and a circumferentially rotatable reversing valve (3) is arranged inside the filter end cover (2), the reversing valve (3) has four gears, and the four gears total 135 degrees, so as to correspond to the four working states of the filter body (1); A handle (4) is connected to the reversing valve (3) by snapping, the circumferential rotation of the handle (4) being used to switch the gear position of the reversing valve (3), and the handle (4) is provided with a limit structure for limiting the maximum angle of the circumferential rotation of the handle (4), the filter end cover (2) is provided with a stopper (10) cooperating with the limit structure, and the handle (4) is provided with a detachable long handle (8); A pressure gauge (5) plugged into the top of the filter end cover (2) for measuring the pressure inside the filter body (1); The reversing valve (3) comprises a valve body (31) and a valve core (32); the valve body (31) is rotatably sleeved on the outer periphery of the valve core (32); the valve core (32) is fixed in the filter end cover (2); the valve core (32) is symmetrically provided with an inlet (321) and an outlet (322) in the circumference; the outer periphery of the valve core (32) is provided with two annular grooves (323) for installing sealing elements; the annular grooves (323) are provided on both sides of the inlet (321) and the outlet (322); and a water outlet is also provided at the bottom of the valve core (32); The valve body (31) is a hollow cylindrical structure. A sealing ring (6) is provided on the outer periphery of the valve body (31) for sealing the valve body (31) and the filter end cover (2). The valve body (31) has a first channel (311) which can connect the water inlet (21) with the inner cavity of the filter body (1) by rotation, a second channel (312) which can connect the water inlet (21) with the water outlet (22) by rotation, a stopper structure (313) which can block both the water inlet (21) and the water outlet (22) by rotation, and a third channel (314) which can connect the water inlet (21) with the sewage outlet (23) and block the water outlet (22) by rotation. The valve body (31) comprises an inner tube and an outer tube coaxially sleeved, a sandwich channel is formed between the inner tube and the outer tube, the sandwich channel is provided with a partition plate to divide the sandwich channel into an upper space and a lower space, and the upper space and the lower space are both provided with a spoke-type partition plate; The first channel (311) comprises a first through hole connected to the water inlet (21) and a second through hole connected to the water outlet (22), the first through hole and the second through hole being symmetrically arranged in the circumference of the outer cylinder, the first through hole being in communication with the lower layer space, the second through hole being in communication with the internal space of the inner cylinder via the water outlet channel of the first channel (311), and the outer circumferences of the first through hole and the second through hole are both provided with grooves for mounting the sealing ring (6); The second channel (312) is arranged on the outer circumference of the outer tube. The outer circumference of the outer tube is also provided with a groove body surrounding the second channel (312). The sealing ring (6) is arranged in the groove body. The second channel (312) comprises a first docking groove docking with the water inlet (21) and a second docking groove docking with the water outlet (22). The first docking groove and the second docking groove are symmetrically arranged in the circumference of the outer tube, and the first docking groove and the second docking groove are connected through the annular water groove of the second channel (312). The third channel (314) comprises a third through hole connected to the water inlet (21) and the stop structure (313) for blocking the water outlet (22); the third through hole and the stop structure (313) are symmetrically arranged in the circumference of the outer cylinder; the third through hole is connected to the internal space of the inner cylinder through the water inlet channel of the third channel (314); and the outer circumferences of the third through hole and the stop structure (313) are both provided with the groove for mounting the sealing ring (6).

2. The multi-stage adjustable filter according to claim 1, characterized in that: The filter end cover (2) is provided with a limiting member (7), the top of the valve body (31) is provided with an annular limiting groove (315) in the circumferential direction, the limiting member (7) is arranged in the annular limiting groove (315), a plurality of clamping grooves (316) extending along the axial direction of the valve body (31) are provided in the annular limiting groove (315), and the clamping grooves (316) extend to the top of the valve body (31), and the bottom end of the handle (4) is provided with a clamping foot (42) clamped with the clamping groove (316).

3. The multi-stage adjustable filter according to claim 1, characterized in that: The valve body (31) and the long handle (8) are both provided with foolproof structures, the top end surface of the handle (4) is provided with an indication arrow for pointing to the current gear state of the reversing valve (3), and the long handle (8) is provided with a plurality of through holes (82) for displaying the indication arrows (41).

4. The multi-stage adjustable filter according to any one of claims 1 to 3, characterized in that: The filter body (1) comprises a filter bottle (11) and a filter element (12) disposed in the filter bottle (11); the filter element (12) and the valve core (32) are sealedly connected; the filter end cover (2) is threadedly connected to the filter bottle (11); and a fixing bracket (9) is provided on the filter end cover (2).

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