A backwash valve structure of a water purification filter and a water purification filter having the same

Abstract

The application provides a backwashing valve body structure of a water purifying filter and a water purifying filter with the same, which comprises a valve body assembly and a valve core. The valve body assembly is provided with a water inlet channel and a waste water channel. The valve core is vertically and slidably arranged in the valve body assembly to form a first water flow path and a second water flow path on the valve core or between the valve core and the valve body assembly. The first water flow path or the second water flow path penetrates through the upper and lower ends of the valve core in the axial direction. When the valve core slides to a filtering state, the first water flow path is communicated with the water inlet channel, and the waste water channel is blocked and cut off from the second water flow path. When the valve core slides to a backwashing state, the first water flow path is blocked and cut off from the water inlet channel, and the waste water channel is communicated with the second water flow path. In this way, the water purifying filter is switched between the filtering state and the backwashing state by sliding the valve core. The sliding valve core structure is simple and direct, has a short stroke, a relatively fast switching speed, and a small water pressure resistance of the valve core sliding.

Description

Technical Field

[0001] This invention relates to the field of water purification system technology, and in particular to a backwash valve body structure for a water purification filter and a water purification filter having the same. Background Technology

[0002] Existing water filters, especially those using membrane separation technology (such as ultrafiltration and nanofiltration), require periodic backwashing to remove impurities trapped on the filter element surface, thereby restoring the water flow and filtration efficiency. The valve body used to switch between filtration and backwashing positions is one of the core components of such systems. However, existing backwashing valve bodies generally suffer from the following technical limitations:

[0003] Low switching efficiency and high fluid resistance: Existing valve bodies mostly adopt rotary or ceramic disc rotary structures. These structures often require a long stroke or complex motion trajectory to fully achieve flow channel switching, resulting in slow switching speed, poor stability and reliability, and unsatisfactory performance.

[0004] In rotary valves, the traditional valve core design results in a large effective pressure-bearing axial cross-sectional area in the water pressure direction. This causes the valve core to face a strong water pressure thrust when rotating, thereby increasing the rotational water pressure resistance and affecting the driving efficiency and switching speed.

[0005] Meanwhile, traditional sealing structures are often not specifically optimized, resulting in high sliding friction resistance, which further limits the valve's rapid response capability.

[0006] The backwashing effect is not ideal: Due to the slow switching speed and hydraulic loss in the flow channel of the existing valve body, the pressure difference (i.e. the pressure driving the backwashing) on ​​both sides of the filter element is slowly established at the moment the backwashing is started, and it is difficult to reach the maximum value instantly.

[0007] Studies have shown that the key to effectively removing filter contamination lies in generating a huge instantaneous pressure differential (similar to the water hammer effect) within a very short time after backwashing begins, providing a powerful impact force to strip away contaminants. Existing structures, due to the lack of synergy between low-resistance design and high-speed switching capability, struggle to generate this maximized instantaneous pressure differential, thus affecting the thoroughness and efficiency of backwashing.

[0008] The contradiction between hydraulics and structural efficiency: To ensure sufficient water flow capacity, existing valve designs are often complex, requiring large valve core strokes and flow channel openings. However, this redundant design sacrifices the valve's structural compactness and exacerbates friction and water resistance, creating a vicious cycle of long stroke and high resistance. Current technology lacks a design that can precisely match hydraulic opening efficiency (full flow channel opening) with minimizing structural stroke.

[0009] Lack of safety and additional functions: Most existing backwash valves do not include an "emergency water supply cut-off" function as an inevitable result of station switching. In addition, the valve's drive speed is usually fixed, which cannot meet the asymmetrical speed requirements of the filtration station (which needs to open slowly to prevent water hammer) and the backwash station (which needs to open quickly to generate impact).

[0010] Therefore, there is an urgent need in this field for a new type of backflushing valve body structure that can solve problems or defects such as high resistance, long stroke, and low efficiency through structural innovation. Summary of the Invention

[0011] The purpose of this invention is to provide a backwash valve body structure for a water purifier and a water purifier having the same, which achieves rapid state switching through an up-and-down sliding mechanism and has low sliding water pressure resistance.

[0012] To achieve the above objectives, the present invention provides a backwash valve body structure for a water purifier, the water purifier comprising a filtration state and a backwash state, characterized in that the backwash valve body structure comprises:

[0013] The valve body assembly has an inlet water channel and a wastewater channel;

[0014] The valve core is slidably disposed within the valve body assembly along its axial direction, so as to switch the water filter between the filtration state and the backwashing state by sliding the valve core. The valve core has a columnar structure, so as to form a first water flow path and a second water flow path on the valve core or between the valve core and the valve body assembly. The first water flow path or the second water flow path passes through the upper and lower ends of the valve core along the axial direction of the valve core.

[0015] Specifically, when the valve core slides to the filtration state, the first water flow path is connected to the inlet channel, and the wastewater channel is blocked from the second water flow path; when the valve core slides to the backwash state, the first water flow path is blocked from the inlet channel, and the wastewater channel is connected to the second water flow path.

[0016] As can be seen from the above technical solution, the backwash valve body structure of the present invention switches the water filter between the filtration state and the backwash state by sliding the valve core. The sliding valve core structure has a simple design, direct movement trajectory, short stroke, and fast switching speed. In addition, the water pressure resistance of the valve core sliding vertically is small. Furthermore, the first water flow path or the second water flow path passes through the upper and lower ends of the valve core along the axial direction, so that the internal flow channel of the valve core is set to be through along its sliding direction. This reduces the effective axial pressure cross-sectional area of ​​the valve core in the axial direction. The flow direction of the water inside the valve core is parallel to the sliding direction of the valve core, which further reduces the water pressure resistance when the valve core slides.

[0017] In addition, the technical solution of the present invention provides a backwash valve body structure for a water purifier, the water purifier including a filtration state and a backwash state, characterized in that the backwash valve body structure includes:

[0018] The valve body assembly has an inlet water channel and a wastewater channel;

[0019] A valve core is slidably disposed within the valve body assembly along its axial direction, so as to switch the water filter between the filtration state and the backwashing state by means of the valve core, so as to form a first water flow path and a second water flow path on the valve core;

[0020] Specifically, when the valve core slides to the filtration state, the first water flow path is connected to the inlet channel, and the wastewater channel is blocked from the second water flow path; when the valve core slides to the backwash state, the first water flow path is blocked from the inlet channel, and the wastewater channel is connected to the second water flow path.

[0021] The valve core and the inner wall of the valve body assembly are sequentially provided with an upper sealing ring, a middle sealing ring, and a lower sealing ring along their axial direction. The middle sealing ring provides a sliding seal for the valve core. In the filtration state, one of the upper and lower sealing rings cooperates with the middle sealing ring to block and seal the wastewater channel. In the backwashing state, the other of the upper and lower sealing rings cooperates with the middle sealing ring to block and seal the water inlet channel.

[0022] As can be seen from the above technical solution, the backwash valve body structure of the present invention switches the water filter between the filtration state and the backwash state by sliding the valve core. The sliding valve core structure has a simple design, direct movement trajectory, short stroke, and fast switching speed. In addition, the water pressure resistance of the valve core sliding vertically is small. Furthermore, the valve core is provided with a sliding seal through the middle section sealing ring, so that the frictional resistance of the valve core sliding is mainly concentrated in the middle section area, thereby effectively reducing the overall sliding frictional resistance of the valve core. Moreover, the upper and lower sealing rings cooperate with the middle sealing ring to achieve the sealing and switching of the inlet and wastewater channels. The structural design is stable and reliable, and the performance is good.

[0023] In addition, the technical solution of the present invention provides a water purifier, characterized in that it includes:

[0024] The backwash valve body structure as described in any of the above technical solutions;

[0025] The bottle body or valve body assembly is provided with a water outlet channel, and the backwash valve body structure is covered at the mouth of the bottle body;

[0026] Filter media, wherein the filter media is disposed inside the bottle;

[0027] The valve core has a filtering state and a backwashing state. When the valve core slides to the filtering state, the water inlet channel is opened, allowing water flowing into the water inlet channel to be filtered by the filter media and then flow out through the water outlet channel. When the valve core slides to the backwashing state, the wastewater channel is opened, allowing filtered clean water to backwash the filter media and flush away the impurities intercepted by the filter media, which are then discharged through the wastewater channel.

[0028] As can be seen from the above technical solution, the water filter with a backwash valve body structure of the present invention switches the water filter between the filtration state and the backwash state by sliding the valve core. The sliding valve core structure design is simple, the movement trajectory is direct, the stroke is short, the switching speed is fast, and the water pressure resistance of the valve core sliding vertically is small, making it stable, reliable, and effective. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the internal structure of the valve core of the water purifier provided in Embodiment 1 of this application when it is in the filtration state;

[0030] Figure 2 This is a perspective view of the valve core of the water purifier provided in Embodiment 1 of this application in the filtration state;

[0031] Figure 3 This is an exploded view of the structure of a water purifier provided in one embodiment of this application;

[0032] Figure 4 This is an exploded view of the structure of a water purifier provided in one embodiment of this application;

[0033] Figure 5 This is a top view of the valve core of a water purifier provided in an embodiment of this application in the filtration state;

[0034] Figure 6 This is provided in Embodiment 1 of this application. Figure 5 Sectional view at point AA;

[0035] Figure 7 This is provided in Embodiment 1 of this application. Figure 6 Enlarged image;

[0036] Figure 8 This is provided in Embodiment 1 of this application. Figure 5 Sectional view at point BB;

[0037] Figure 9 This is a schematic diagram of the internal structure of the valve core in the backwashing state provided in Embodiment 1 of this application;

[0038] Figure 10 This is an exploded view of the valve core and valve sleeve provided in Embodiment 1 of this application;

[0039] Figure 11 This is an exploded view of the valve core and valve sleeve provided in Embodiment 1 of this application from another perspective;

[0040] Figure 12 This is a schematic diagram of the internal structure of the valve core provided in Embodiment 2 of this application under backwashing conditions;

[0041] Figure 13 This is a schematic diagram of the internal structure of the valve core in the filtering state according to Embodiment 2 of this application;

[0042] Figure 14 These are schematic diagrams of the valve core structure provided in Embodiments 3 and 4 of this application;

[0043] Figure 15 This is a schematic diagram of the internal structure of the valve core in the backwashing state provided in Embodiment 3 of this application;

[0044] Figure 16 This is a schematic diagram of the internal structure of the valve core in the filtering state according to Embodiment 3 of this application;

[0045] Figure 17 This is a schematic diagram of the valve core provided in Embodiment 5 of this application;

[0046] Figure 18 This is a perspective view of the valve core provided in Embodiment 1 of this application;

[0047] Figure 19 This is a perspective view of the valve core provided in Embodiment Six of this application; Detailed Implementation

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Please refer to the following: Figures 1 to 19Embodiment 1 of the present invention provides a water purifier filter, including a body 100, filter media 400, and valve core 500. The body 100 includes a bottle 200 and a valve assembly 300. The valve assembly 300 is provided with an inlet channel 310, an outlet channel 320, and a wastewater channel 330. The filter media 400 is disposed inside the bottle 200, and the filter media 400 is provided with a hollow flow channel 410. The valve core 500 is slidably mounted vertically on the valve assembly 300. The valve core 500 has a filtering state and a backwashing state, so that when the valve core 500 slides to the filtering state... When the inlet channel 310 is in the backwash state, it is connected to the hollow flow channel 410 so that the water flowing into the inlet channel 310 flows into the hollow flow channel 410 through the valve core 500, and flows into the bottle body 200 after being filtered from the inside to the outside by the filter media 400 and flows out through the outlet channel 320. When the valve core 500 slides to the backwash state, the wastewater channel 330 is connected to the hollow flow channel 410 so that the water in the bottle body 200 backwashes the filter media 400 and washes the impurities intercepted by the filter media 400 into the hollow flow channel 410 and is discharged through the wastewater channel 330.

[0050] As can be seen, in the filter provided in Embodiment 1, when the valve core 500 slides to the filtration state, the valve core 500 connects the inlet channel 310 with the hollow flow channel 410, allowing the raw water flowing into the inlet channel 310 to flow into the hollow flow channel 410 of the filter media 400. The raw water is then filtered from the inside of the filter media 400 to the outside, and the filtered clean water flows into the inner cavity of the bottle 200 and out through the outlet channel 320 for user use. When the valve core 500 slides to the backwash state, the valve core 500 connects the wastewater channel 330 with the hollow flow channel 410, allowing the clean water in the inner cavity of the bottle 200 to backwash from the outside of the filter media 400 to the inside, thereby flushing the impurities and wastewater intercepted by the filter media 400 into the hollow flow channel 410. The wastewater is discharged through the wastewater channel 330. This design ensures that the entire filter media 400 is flushed from the outside in, flushing away most impurities and wastewater within the hollow flow channel 410, which can then be discharged through the drain channel. This restores the filtration performance of the filter media 400 and extends its service life. Users can flush the filter media 400 without disassembling it. Furthermore, the filter media 400 filters from the inside out, which is the opposite of the conventional filter structure. During backwashing, because the surface area of ​​the inner side of the filter media 400 is smaller than that of the outer side, the flushing flow rate per unit area on the inner side of the filter media 400 is faster under the same flushing flow rate, effectively improving the flushing effect. The product is highly practical and provides a good user experience.

[0051] Preferably, the bottle body 200 is a hollow cylindrical structure with an open top. The top of the outer circumferential surface of the bottle body 200 has external threads, and the bottom of the inner circumferential surface of the valve body assembly 300 has internal threads, allowing the valve body assembly 300 to be detachably mounted on the bottle body 200. The central axes of the valve body assembly 300 and the bottle body 200 are aligned, so that when the user needs to replace the filter media 400 or repair other components, the valve body assembly 300 can be unscrewed from the bottle body 200. The filter media 400 has a rolled structure and can be a PP cotton filter cartridge. The PP cotton filter cartridge is made from non-toxic and odorless polypropylene, which is heated, melted, spun, drawn, and shaped into a rolled filter media 400. The PP cotton filter cartridge has uniform pore size and excellent properties such as high filtration efficiency and acid and alkali resistance.

[0052] In this embodiment, please refer to the following: Figures 1 to 19 The filter material 400 is vertically arranged in the bottle body 200, and the top of the hollow flow channel 410 is provided with a first opening 420 so that when the valve core 500 slides to the filtering state, the water inlet channel 310 is connected to the hollow flow channel 410 through the first opening 420.

[0053] In this embodiment, please refer to the following: Figures 1 to 11 The valve body assembly 300 has a receiving cavity 340, in which the valve core 500 is slidably installed vertically. The hollow flow channel 410 communicates with the receiving cavity 340 through the first opening 420. The receiving cavity 340 provides a stable installation position and precise sliding space for the valve core 500, making the vertical sliding of the valve core 500 smoother, thereby ensuring that the filter can work normally in both filtration and backwashing states.

[0054] Specifically, the bottom of the accommodating cavity 340 is provided with a through hole for connecting the first opening 420. The outer peripheral edge of the first opening 420 extends upward to form an annular protruding wall. The hollow flow channel 410 is connected to the accommodating cavity 340 by inserting the annular protruding wall into the through hole. Preferably, an elastic seal is provided between the annular protruding wall and the cavity wall of the accommodating cavity 340 to prevent raw water or backwash water from leaking between the annular protruding wall and the cavity wall of the accommodating cavity 340.

[0055] In this embodiment, the water outlet channel 320 is directly connected to the inner cavity of the bottle body 200.

[0056] In one possible implementation, the water outlet channel 320 is connected to the inner cavity of the bottle body 200 via the valve core 500.

[0057] In this embodiment, please refer to the following: Figures 1 to 19The valve body assembly 300 is equipped with a drive component 600, which is connected to the valve core 500. The drive component 600 can be a drive motor or a handle. The drive motor can be a linear motor or other conventional motor. The drive motor can drive the valve core 500 to slide up and down automatically. The drive component 600 controls the valve core 500 to slide up and down in the receiving cavity 340. By using the drive component 600 to drive the valve core 500 to slide up and down in the receiving cavity 340, the valve core 500 can switch between the filtration state and the backwashing state. By setting the drive component 600, the user can easily control the valve core 500 to slide up and down in the receiving cavity 340 without direct contact with the valve core 500. This makes it more convenient and less labor-intensive to switch the filter between the filtration state and the backwashing state, improving the ease of use.

[0058] Specifically, the drive unit 600 manually drives the valve core 500 to slide. A guide structure is provided between the valve core 500 and the accommodating cavity 340 to guide the valve core 500 to slide vertically. The top of the valve core 500 is provided with a plug post 510, and the outer surface of the plug post 510 is provided with external threads. The drive unit 600 is a handle, and the bottom of the handle is provided with a plug groove 610, which is provided with internal threads. The plug post 510 and the plug groove 610 are connected by threads, so that by turning the handle, the valve core 500 can slide up or down under the guidance of the guide structure. The drive is achieved by connecting the handle and the valve core 500 by threads. When the handle is turned, the rotational motion of the handle can be efficiently converted into the vertical linear motion of the valve core 500 by the transmission principle of the threads. The sliding distance of the valve core 500 can be precisely controlled as needed, so as to achieve precise control of the filtration and backwashing process.

[0059] Specifically, in this embodiment, the guide structure includes a limiting protrusion 710 and a limiting groove. By vertically setting the limiting protrusion 710 on the outer surface of the valve core 500 and vertically extending the limiting groove on the inner surface of the valve body assembly 300, the valve core 500 is made to be non-rotatable relative to the valve body assembly 300 by inserting the limiting protrusion 710 into the limiting groove. This guide structure is easy to manufacture and install. The positions of the limiting protrusion 710 and the limiting groove can be interchanged, and such simple replacement should also be within the protection scope of this invention.

[0060] In one possible implementation, by providing an outer surface structure of an irregular prism on the valve core 500 and providing an irregular groove corresponding to the irregular prism in the accommodating cavity 340, the valve core 500 is made non-rotatable relative to the valve body assembly 300 by inserting the irregular prism into the irregular groove. When the handle is turned, the rotational motion of the handle can be converted into the up-and-down linear motion of the valve core 500 by utilizing the transmission principle of the thread.

[0061] In this embodiment, a first water flow path and a second water flow path are formed in the valve core 500, so that in the filtration state, the first water flow path connects the hollow flow channel 410 with the water inlet channel 310, and in the backwashing state, the second water flow path connects the hollow flow channel 410 with the wastewater channel 330.

[0062] By setting a first water flow path and a second water flow path in the valve core 500, the filter can be clearly switched between filtration and backwashing states. In filtration state, the first water flow path connects the inlet channel 310 and the hollow flow channel 410, allowing raw water to flow into the hollow flow channel 410 through the first water flow path in the valve core 500, and after being filtered from the inside out by the filter media 400, it flows out from the outlet channel 320, achieving normal filtration function. In backwashing state, the second water flow path connects the wastewater channel 330 and the hollow flow channel 410, allowing clean water in the bottle 200 to backwash the filter media 400 from the outside in, and the wastewater and impurities carried by the filter media flow into the wastewater channel 330 through the second water flow path in the valve core 500 and are discharged. This setting effectively prevents the filter media 400 from clogging, extends the service life of the filter media 400, and ensures the filtration effect and stability of the filter. In Example 1, both the raw water in the filtration state and the backwash water in the backwashing state flow through the interior of the valve core 500.

[0063] Specifically, such as Figures 1 to 19 As shown, the first or second water flow path passes through the upper and lower ends of the valve core 500 along the axial direction of the valve core, the valve core 500 is arranged vertically, and a second opening 540 is formed at the bottom of the valve core 500, a third opening 550 is formed at the top of the valve core 500, and a fourth opening 560 is opened on the side wall of the valve core 500.

[0064] In this embodiment, as Figures 1 to 19As shown, specifically, the first water flow path extends axially through both the upper and lower ends of the valve core 500. The second opening 540 serves as one end of the first water flow path and one end of the second water flow path, while the third opening 550 serves as the other end of the first water flow path, and the fourth opening 560 serves as the other end of the second water flow path. The valve core 500 is slid downwards, causing the third opening 550 to be connected, and the fourth opening 560 to be blocked by the cavity wall of the receiving cavity 340, allowing the raw water flowing into the inlet channel 310 to pass through the first water flow path. The water flows into the hollow channel 410 and is filtered from the inside out by the filter media 400 before flowing into the cavity of the bottle body 200 and being discharged through the outlet channel 320. The upward sliding valve core 500 blocks the third opening 550 by the cavity wall of the receiving cavity 340, and the fourth opening 560 is connected so that the filtered water in the cavity of the bottle body 200 backwashes the filter media 400. The backwash water carrying impurities flows from the hollow channel 410 through the second water flow path into the wastewater channel 330 and is discharged through the wastewater channel 330.

[0065] In this embodiment, please refer to the following: Figures 1 to 19 The valve body assembly 300 includes an upper cover 350 and a valve sleeve 360. The upper cover 350 is hollow to form a cavity. The bottom of the cavity is open. The valve sleeve 360 ​​is disposed in the cavity of the upper cover 350. The valve core 500 can slide vertically relative to the valve sleeve 360.

[0066] Specifically, when the valve core 500 slides to the filtration state, the valve core 500 cooperates with the valve sleeve 360 ​​to connect the water inlet channel 310 with the hollow flow channel 410; when the valve core 500 slides to the backwash state, the valve core 500 cooperates with the valve sleeve 360 ​​to connect the wastewater channel 330 with the hollow flow channel 410.

[0067] The valve core 500 and valve sleeve 360 ​​work together to precisely switch between filtration and backwashing modes. The valve sleeve 360 ​​is spot-welded to the upper cover 350. In filtration mode, the valve core 500 and valve sleeve 360 ​​ensure accurate connection between the inlet channel 310 and the hollow flow channel 410, allowing water to smoothly enter the hollow flow channel 410 from the inlet channel 310, be filtered by the filter media 400, and then flow out from the outlet channel 320. In backwashing mode, the valve core 500 and valve sleeve 360 ​​also connect the wastewater channel 330 to the hollow flow channel 410, enabling backwashing of the filter media 400 and discharging impurities from the wastewater channel 330. This precise connection ensures the normal operation of the filter and its efficient filtration and backwashing functions.

[0068] Furthermore, such as Figures 1 to 19As shown, the inlet channel 310, outlet channel 320, and wastewater channel 330 are all located on the upper cover 350, and are connected to the cavity. The valve sleeve 360 ​​has a first connecting cavity 361 and a second connecting cavity 362. The first connecting cavity 361 is connected to the inlet channel 310, and the second connecting cavity 362 is connected to the wastewater channel 330. When the valve core 500 slides down to the filtration state, the third opening 550 connects to the first connecting cavity 361 so that the first water flow path connects the first connecting cavity 361 to the hollow flow channel 410. When the valve core 500 slides up to the backwash state, the fourth opening 560 connects to the second connecting cavity 362 so that the second water flow path connects the second connecting cavity 362 to the hollow flow channel 410. This configuration allows the filter to switch stably between the filtration and backwash states. The direction and channel of water flow are clearly planned for each state, avoiding problems such as incomplete filtration or poor backwashing effect caused by chaotic water flow, thus ensuring the reliability of the filter function.

[0069] Specifically, one end of the first connecting cavity 361 is located on the top wall of the valve sleeve 360, and the other end is located on the outer side wall of the valve sleeve 360, so that in the filtration state, the two ends of the first connecting cavity 361 are connected to the inlet channel 310 and the first water flow path, respectively. One end of the second connecting cavity 362 is located on the outer side wall of the valve sleeve 360, and the other end is located on the inner side wall of the valve sleeve 360, so that in the backwashing state, the two ends of the second connecting cavity 362 are connected to the wastewater channel 330 and the second water flow path, respectively.

[0070] Preferably, such as Figures 1 to 19 As shown, there are two wastewater channels 330, which are arranged opposite to each other.

[0071] The two opposing wastewater channels 330 allow for more even discharge of wastewater from different directions during backwashing, avoiding the problems of poor wastewater discharge or insufficient local backwashing force that might occur with a single wastewater channel 330. This allows for more effective removal of impurities and wastewater intercepted on the filter media 400, improving the backwashing effect and extending the service life of the filter media 400. The opposing wastewater channels 330 also help balance the water flow pressure during backwashing, resulting in a more uniform water distribution within the filter. This reduces the risk of damage to the internal structure of the filter caused by uneven water flow pressure, improving the stability and reliability of the filter's operation.

[0072] In this embodiment, please refer to the following: Figures 1 to 19An air bladder 210 is provided in the inner cavity of the bottle body 200. The air bladder 210 includes a thin film bladder with a sealed space. The sealed space is filled with gas so that the air bladder 210 is compressed under water pressure, thereby eliminating the water hammer impact on the water purifier. When the valve core 500 slides to the backwash state, the air bladder 210 expands due to depressurization, causing the filtered water in the bottle body 200 to backwash the filter media 400. This allows the impurities and sewage intercepted by the filter media 400 to be flushed into the hollow flow channel 410 and discharged through the wastewater channel 330.

[0073] The air bladder 210 is compressed under water pressure, effectively buffering the impact of the water flow and eliminating water hammer impact on the water purifier. This helps protect the filter and connected pipes and equipment, reducing component damage and leakage caused by water hammer, and extending the service life of the entire filtration system. When the valve core 500 slides to the backwash state, the air bladder 210 expands under pressure, squeezing the filtered water inside the bottle 200, causing the filtered water to backwash the filter media 400. This backwashing more effectively flushes the impurities and wastewater intercepted by the filter media 400 into the hollow flow channel 410 and discharges through the wastewater channel 330, improving the backwashing effect of the filter media 400, helping to maintain the good filtration performance of the filter media 400, enabling it to work stably for a long time, and ensuring the quality of the filtered water.

[0074] In this embodiment, please refer to the following: Figures 1 to 19 The inner wall of the bottle body 200 is provided with multiple support ribs 220 at intervals along the circumference. The upper and lower ends of the filter material 400 abut against the valve body assembly 300 and the support ribs 220 respectively, so as to form an accommodating space 230 between the lower end of the filter material 400 and the bottom wall of the bottle body 200. The air bag 210 is placed in the accommodating space 230.

[0075] By providing support ribs 220 on the inner wall of the bottle body 200, a receiving space 230 is formed between the filter media 400 and the bottom wall of the bottle body 200 to house the airbag 210. This method makes full use of the internal space of the bottle body 200, resulting in a more compact filter structure. The support ribs 220 not only provide support for the filter media 400 but also limit the placement of the airbag 210, preventing it from moving freely within the bottle body 200. Furthermore, the receiving space 230 provides some protection for the airbag 210, reducing the possibility of damage from water flow impact or other external forces, thereby improving the service life and operational stability of the airbag 210 and ensuring its effective performance in eliminating water hammer impact and backwashing.

[0076] Furthermore, the volume of the air bladder 210 is approximately 0.75-1.25 times the volume of the hollow flow channel 410. This design ensures that the expansion volume of the air bladder 210 is similar to the volume of the hollow flow channel 410. This allows the air bladder 210 to expand under pressure during backwashing, discharging wastewater of equal volume from the wastewater channel 330 outside the main body 100. This improves the effectiveness of the air bladder 210 in assisting the backwashing of the filter media 400. Alternatively, an external pressure tank can be installed on the outlet channel 320 side of the backwash filter. During backwashing, the air bladder inside the pressure tank expands, also assisting the backwashing of the filter media 400. Alternatively, a plastic water pipe with a low elasticity coefficient can be used on the outlet channel 320 side of the backwash filter. During backwashing, the water pipe contracts under pressure, also assisting the backwashing of the filter media 400 and discharging wastewater of equal volume from the wastewater channel 330 outside the main body 100.

[0077] The water purifier features an inside-out filtration structure that achieves high precision without affecting water pressure. Because the outer layer of filter media 400 has a filtration area 15 times that of the inner layer, it has lower resistance. The filtration precision of filter media 400 can be gradually increased from the inside out. Even if the outer layer of filter media 400 is 15 times larger than the inner layer, the resistance of filter media 400 will not increase. In contrast, conventional filters have an outside-in filtration structure where the inner surface of filter media 400 is 1 / 15 of the outer surface, which cannot improve filtration precision without increasing resistance.

[0078] The volume of the hollow channel 410 is approximately 1 / 15 of the overall volume of the filter media 400. The water capacity of the hollow channel 410 is approximately 150ml. Its small volume is similar to the contracted volume of the air bladder 210. Therefore, the pressure generated by the depressurization and expansion of the air bladder 210 can effectively remove impurities and wastewater from the hollow channel 410. In addition to the air bladder 210, the external water pipe and bottle 200 also expand and contract under water pressure. Therefore, the volume deformation of the air bladder 210, the water pipe, and the bottle 200 after depressurization is generally greater than the volume of the hollow channel 410 of the filter media 400. This effectively removes impurities and wastewater without wasting excessive rinsing water.

[0079] Embodiment 2 of the present invention provides a water purifier filter, which differs from Embodiment 1 in that, as shown in the following... Figures 12 to 13 As shown, when the valve core 500 is slid upward, the fourth opening 560 connects with the first connecting cavity 361 so that the first water flow path connects the first connecting cavity 361 with the hollow flow channel 410. When the valve core 500 is slid downward, the third opening 550 connects with the second connecting cavity 362 so that the second water flow path connects the second connecting cavity 362 with the hollow flow channel 410.

[0080] Embodiment 3 of the present invention provides a water purifier filter, which differs from Embodiment 2 in that, as shown in... Figures 14 to 16 As shown, the valve core 500 does not have a fourth opening 560. A second water flow path is formed in the valve core 500, and a first water flow path is formed between the valve core 500 and the valve body assembly 300. In the filtration state, the first water flow path connects the hollow flow channel 410 to the inlet channel 310. In the backwashing state, the second water flow path connects the hollow flow channel 410 to the wastewater channel 330. In this embodiment, the backwash water in the backwashing state flows through the interior of the valve core, while the raw water in the filtration state does not flow through the interior of the valve core 500.

[0081] Embodiment 4 of the present invention provides a water purifier filter. The difference from Embodiment 1 is that the valve core 500 does not have a fourth opening 560. A first water flow path is formed within the valve core 500, and a second water flow path is formed between the valve core 500 and the valve body assembly 300. In the filtration state, the first water flow path connects the hollow flow channel 410 to the inlet channel 310. In the backwashing state, the second water flow path connects the hollow flow channel 410 to the wastewater channel 330. In this embodiment, raw water in the filtration state flows through the interior of the valve core 500, while backwash water in the backwashing state does not flow through the interior of the valve core 500.

[0082] Embodiment 5 of the present invention provides a water purifier filter, which differs from Embodiment 1 or Embodiment 2 in that, as Figure 17 As shown, the bottom of the valve core is recessed upwards to form a fourth opening 560.

[0083] Furthermore, it is worth noting that the shape and number of the second opening 540, the third opening 550, and the fourth opening 560 in this invention should not be construed as a limitation of the invention.

[0084] In one embodiment, a backwash valve body structure for a water purifier is provided, the water purifier including a filtration state and a backwash state, the backwash valve body structure including:

[0085] The valve body assembly 300 has an inlet channel 310 and a wastewater channel 330.

[0086] The valve core 500 is slidably disposed vertically within the valve body assembly 300, so as to switch the water filter between the filtration state and the backwashing state by sliding the valve core 500. The valve core 500 has a columnar structure, so as to form a first water flow path and a second water flow path on the valve core 500.

[0087] Specifically, when the valve core 500 slides to switch to the filtration state, the first water flow path is connected to the inlet channel 310, and the wastewater channel 330 is blocked from the second water flow path; when the valve core 500 slides to switch to the backwash state, the first water flow path is blocked from the inlet channel 310, and the wastewater channel 330 is connected to the second water flow path.

[0088] Among them, such as Figure 18 and Figure 19 As shown, an upper sealing ring 570, a middle sealing ring 580, and a lower sealing ring 590 are sequentially arranged along the axial direction between the valve core 500 and the inner wall of the valve body assembly 300. The upper sealing ring 570 is located at the top of the valve core 500, the lower sealing ring 590 is located at the bottom of the valve core 500, and the middle sealing ring 580 is located on the outer circumferential surface of the middle part of the valve core 500. The middle sealing ring 580 is used to provide a sliding seal for the valve core 500. In the filtration state, the lower sealing ring 580 and the middle sealing ring 580 cooperate to seal the wastewater channel 330. In the backwashing state, the upper sealing ring 570 and the middle sealing ring 580 cooperate to seal the water inlet channel 320.

[0089] As can be seen from the above technical solution, the backwash valve body structure of the present invention allows the water filter to switch between the filtration state and the backwash state by sliding the valve core 500. The sliding valve core 500 has a simple structural design, direct movement trajectory, short stroke, and fast switching speed. In addition, the water pressure resistance of the valve core 500 sliding vertically is small. Furthermore, the middle section sealing ring 580 provides a sliding seal for the valve core 500, so that the frictional resistance of the valve core 500 sliding is mainly concentrated in the middle section area, thereby effectively reducing the overall sliding frictional resistance of the valve core 500, reducing wear, and extending service life. Moreover, the upper section sealing ring 570 and the lower section sealing ring 590 cooperate with the middle section sealing ring 580 to achieve the sealing and switching of the water inlet channel 310 and the wastewater channel 330. The structural design is stable and reliable, and the performance is good.

Claims

1. A backwash valve body structure for a water purifier, the water purifier comprising a filtration state and a backwash state, characterized in that, The backflushing valve body structure includes: The valve body assembly has an inlet water channel and a wastewater channel; The valve core is slidably disposed within the valve body assembly along its axial direction, so as to switch the water filter between the filtration state and the backwashing state by sliding the valve core. The valve core has a columnar structure, so as to form a first water flow path and a second water flow path on the valve core or between the valve core and the valve body assembly. The first water flow path or the second water flow path passes through the upper and lower ends of the valve core along the axial direction of the valve core. Specifically, when the valve core slides to the filtration state, the first water flow path is connected to the inlet channel, and the wastewater channel is blocked from the second water flow path; when the valve core slides to the backwash state, the first water flow path is blocked from the inlet channel, and the wastewater channel is connected to the second water flow path.

2. The backwash valve body structure of the water purifier according to claim 1, characterized in that, The valve body assembly includes: The upper cover has a cavity, and both the water inlet channel and the wastewater channel are opened on the upper cover and are connected to the cavity of the upper cover. A valve sleeve is disposed within the cavity of the upper cover, and a valve core is slidably disposed within the inner cavity of the valve sleeve. When the valve core slides to the filtration state, it engages with the valve sleeve to connect the first water flow path to the inlet channel. When the valve core slides to the backwash state, it engages with the valve sleeve to connect the wastewater channel to the second water flow path.

3. The backwash valve body structure of the water purifier according to claim 1, characterized in that, The bottom of the valve body assembly is through-hole, and the upper end of the valve core is provided with a plug-in post, which passes through the plug-in post from the top wall of the valve body assembly and is connected to the drive component for transmission, so that the valve core can be controlled to slide up and down within the valve body assembly by the drive component.

4. The backwash valve body structure of the water purifier according to claim 3, characterized in that, A guide structure is provided between the valve core and the inner wall of the valve body assembly to guide the valve core to slide vertically. The driving component is a handle, which is rotatably mounted on the valve body assembly and threadedly connected to the plug-in post. Rotating the handle drives the valve core to slide upward or downward under the guidance of the guide structure. The driving component is a drive motor, which is connected to the plug-in post to drive the valve core to slide up or down.

5. The backwash valve body structure of the water purification filter according to any one of claims 1 to 4, characterized in that, The valve core has one of a first water flow path and a second water flow path formed therein, and the lower end of the valve core and the valve body assembly have the other of a first water flow path and a second water flow path formed therein. or The valve core has a second opening at its bottom, a third opening at its top, and a fourth opening on its sidewall. The fourth opening is one or more spaced circumferentially, such that the second opening serves as one end of the first water flow path and one end of the second water flow path; the third opening serves as one of the other ends of the first and second water flow paths; and the fourth opening serves as the other of the other ends of the first and second water flow paths.

6. The backwash valve body structure of the water purification filter according to any one of claims 1 to 4, characterized in that, An upper sealing ring, a middle sealing ring, and a lower sealing ring are sequentially arranged along the axial direction between the valve core and the inner wall of the valve body assembly. The middle sealing ring provides a sliding seal for the valve core. In the filtration state, one of the upper and lower sealing rings cooperates with the middle sealing ring to seal the wastewater channel. In the backwashing state, the other of the upper and lower sealing rings cooperates with the middle sealing ring to seal the water inlet channel.

7. The backwash valve body structure of the water purifier according to claim 2, characterized in that, The valve sleeve is provided with a first connecting cavity and a second connecting cavity. The first connecting cavity is connected to the water inlet channel, and the second connecting cavity is connected to the wastewater channel. When the valve core slides to the filtration state, the first water flow path is connected to the water inlet channel through the first connecting cavity. When the valve core slides to the backwashing state, the wastewater channel is connected to the second water flow path through the second connecting cavity.

8. The backwash valve body structure of the water purifier according to claim 7, characterized in that, One end of the first connecting cavity and the second connecting cavity is open on the top wall of the valve sleeve and the other end is open on the outer wall of the valve sleeve. The other end of the first connecting cavity and the second connecting cavity is open on the outer wall of the valve sleeve and the other end is open on the inner wall of the valve sleeve.

9. A backwash valve body structure for a water purifier, the water purifier comprising a filtration state and a backwash state, characterized in that, The backflushing valve body structure includes: The valve body assembly has an inlet water channel and a wastewater channel; A valve core is slidably disposed within the valve body assembly along its axial direction, so as to switch the water filter between the filtration state and the backwashing state by means of the valve core, so as to form a first water flow path and a second water flow path on the valve core; Specifically, when the valve core slides to the filtration state, the first water flow path is connected to the inlet channel, and the wastewater channel is blocked from the second water flow path; when the valve core slides to the backwash state, the first water flow path is blocked from the inlet channel, and the wastewater channel is connected to the second water flow path. The valve core and the inner wall of the valve body assembly are sequentially provided with an upper sealing ring, a middle sealing ring, and a lower sealing ring along their axial direction. The middle sealing ring provides a sliding seal for the valve core. In the filtration state, one of the upper and lower sealing rings cooperates with the middle sealing ring to block and seal the wastewater channel. In the backwashing state, the other of the upper and lower sealing rings cooperates with the middle sealing ring to block and seal the water inlet channel.

10. A water purifier filter, characterized in that, include: The backwash valve body structure as described in any one of claims 1 to 9; The bottle body or valve body assembly is provided with a water outlet channel, and the backwash valve body structure is covered at the mouth of the bottle body; Filter media, wherein the filter media is disposed inside the bottle; The valve core has a filtering state and a backwashing state. When the valve core slides to the filtering state, the water inlet channel is opened so that water flowing into the water inlet channel is filtered by the filter media and then flows out through the water outlet channel. When the valve core slides to the backwashing state, the wastewater channel is opened so that the filtered clean water backwashes the filter media and washes away the impurities intercepted by the filter media and discharges through the wastewater channel.

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