A filter device

Abstract

This invention discloses a filtration device, including a lower housing, an upper housing, a filter element, and a valve plate. A cavity is formed between the lower housing and the upper housing. The upper housing is provided with an inlet channel, an outlet channel, and a wastewater channel. The filter element is disposed in the cavity and has a hollow channel. The valve plate enables the filtration device to be in either a filtration state or a backwashing state. In the filtration state, the inlet channel and the hollow channel are connected, and the outlet channel is connected to the cavity. In the backwashing state, the inlet channel and the cavity are connected, and the wastewater channel and the hollow channel are connected, so that the backwash water in the cavity passes through the filter element from the outside to the inside and backwashes into the hollow channel and is discharged through the wastewater channel. With this configuration, the backwash water is provided by the inlet channel, and the flow rate and pressure of the backwash water are stable, which can significantly improve the backwashing effect. The structure is simple, the user experience is good, and the product is highly practical.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and more particularly to a filtration device. Background Technology

[0002] As environmental pollution worsens, water quality deteriorates, making water filtration devices increasingly popular. Pre-filters, in particular, are reliable impurity filters that effectively remove sediment, rust, and large particles from tap water. The filter screen precision varies from 5 to 30 microns depending on the brand and model. They primarily remove sediment, bacteria, microbial debris, rust, sand, and other particles larger than 5 microns from pipes, preventing harm to the human body and skin. Furthermore, they provide positive protection for downstream pipes, water purifiers, water heaters, washing machines, and high-end faucets and showerheads.

[0003] However, commonly used pre-filters lack backwashing functionality, causing impurities in the water to become trapped in the filter media. Over time, these impurities become clogged, affecting the water flow and even reducing the filtration efficiency. Therefore, regular cleaning or replacement of the filter is necessary to maintain water flow and filtration effectiveness. Cleaning a pre-filter requires disassembly, which is inconvenient for users. Furthermore, existing backwashing filters are complex in structure, and switching the water flow direction between backwashing and filtration modes is inconvenient. The unstable flow rate and pressure of the backwash water also result in poor backwashing performance, failing to meet user needs. Summary of the Invention

[0004] The purpose of this invention is to provide a filtration device that aims to at least solve one of the technical problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a filtration device, comprising:

[0006] Lower housing;

[0007] An upper housing is mounted on a lower housing to form a cavity between the lower housing and the upper housing. The upper housing is provided with an inlet channel, an outlet channel and a wastewater channel.

[0008] A filter element, wherein the filter element is disposed in the cavity, and the filter element has a hollow flow channel;

[0009] A valve plate, mounted on the upper housing, enables the filter device to be in either a filtration or backwashing state. In the filtration state, the valve plate connects the inlet channel and the hollow channel, and the outlet channel and the cavity, allowing raw water in the hollow channel to flow into the cavity after being filtered from the inside out by the filter element and then discharged from the outlet channel. In the backwashing state, the valve plate connects the inlet channel and the cavity, and also connects the wastewater channel and the hollow channel, allowing backwash water in the cavity to flow from the outside in by the filter element into the hollow channel and then discharged from the wastewater channel.

[0010] Furthermore, a water passage cavity is formed in the upper housing, and the valve plate is rotatably installed in the water passage cavity. By rotating the valve plate, the filter device can be put into a bypass state. In the bypass state, the inlet channel and the outlet channel are connected through the water passage cavity.

[0011] Furthermore, the upper housing includes:

[0012] The body, wherein a receiving cavity is provided;

[0013] A fixed valve assembly is installed in the receiving cavity to separate the receiving cavity into a water passage chamber, the water passage chamber being located between the top of the fixed valve assembly and the inner wall of the body.

[0014] Furthermore, the outer peripheral sidewall of the fixed valve assembly is provided with a limiting protrusion along the vertical direction, and the cavity wall of the receiving cavity is provided with a limiting groove along the vertical direction, so that when the fixed valve assembly is installed in the receiving cavity, the limiting protrusion is inserted into the limiting groove so that the fixed valve assembly cannot rotate in the receiving cavity.

[0015] Furthermore, the valve plate is pressed and installed on the fixed valve assembly, with the bottom of the valve plate and the top of the fixed valve assembly fitted together. The top of the valve plate is provided with a connecting part, the top of the connecting part protruding through the top of the upper housing, and the top of the connecting part is provided with a handle to drive the valve plate to rotate by turning the handle.

[0016] Furthermore, the inlet channel, outlet channel, and wastewater channel are all connected to the water passage cavity through the fixed valve assembly, and the hollow channel and the cavity are also connected to the water passage cavity through the fixed valve assembly.

[0017] Furthermore, the top of the fixed valve assembly is formed with a first opening communicating with the inlet channel, a second opening communicating with the outlet channel, a third opening communicating with the wastewater channel, a fourth opening communicating with the hollow channel, and a fifth opening communicating with the cavity.

[0018] Specifically, by rotating the valve plate to put the filter device into a filtering state, in the filtering state, the valve plate connects the first opening with the fourth opening and the fifth opening with the second opening. In the backwashing state, the valve plate connects the first opening with the fifth opening and the fourth opening with the third opening. In the bypass state, the first opening and the second opening are connected.

[0019] Furthermore, the valve plate has at least a first chamber and a second chamber, as well as a first port and a second port. In the filtration state, the first port and the fourth port are respectively connected to the first chamber, and the fifth port and the second port are respectively connected to the second chamber. In the backwashing state, the first port is configured to correspond to the first port and the fifth port is configured to correspond to the second port, so that the first port and the fifth port are connected through a water passage chamber, and the fourth port and the third port are connected through the first chamber. In the bypass state, the first port is configured to correspond to the first port and the second port is configured to correspond to the second port, so that the first port and the second port are connected through a water passage chamber.

[0020] Furthermore, the first chamber and the second chamber are formed by the upward concave extension of the bottom of the valve plate.

[0021] Furthermore, the inner wall of the lower housing extends radially inward to form a protruding wall, and an installation platform is provided on the protruding wall. The installation platforms are combined to form an installation plane, and the bottom of the filter element is disposed on the installation plane.

[0022] As can be seen from the above technical solution, the filtration device of the present invention forms a cavity between the lower housing and the upper housing by hollowing out the lower housing and providing an opening at its top, and installing the upper housing at the opening. A filter element is disposed in the lower housing, and a hollow flow channel is provided inside the filter element. An inlet flow channel, an outlet flow channel, and a wastewater flow channel are also provided on the upper housing. The filtration device can be adjusted to either a filtration state or a backwashing state by a valve plate. In the filtration state, the valve plate connects the inlet flow channel and the hollow flow channel, and the outlet flow channel and the cavity. At this time, raw water enters through the inlet flow channel and flows into the hollow flow channel. The raw water is filtered by the filter element as it flows from the hollow flow channel into the cavity. The purified water in the cavity flows out through the outlet flow channel for use in filtration. For user use, in backwash mode, the valve plate connects the inlet channel and the cavity, as well as the wastewater channel and the hollow channel. Backwash water enters through the inlet channel and flows into the cavity. The backwash water in the cavity enters the hollow channel inside the filter element from the outside to rinse the filter element and the hollow channel. Then, the backwash water carrying impurities is discharged from the wastewater channel. With this setup, users can clean the filter element and restore its filtration performance without disassembling the filter device. Furthermore, the backwash water in backwash mode is supplied by the inlet channel, and the flow rate and pressure of the backwash water are stable, which can significantly improve the backwashing effect. The filter device with this setup has a simple structure, a good user experience, and strong product practicality.

[0023] To make the technical concept, other objects, advantages, features and functions of the present invention clearer and easier to understand, preferred embodiments will be specifically described in the following detailed description, in conjunction with the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of the filtering device provided in the embodiments of this application;

[0026] Figure 2 This is a schematic diagram of the internal structure of the filtering device provided in the embodiments of this application;

[0027] Figure 3 This is an exploded view of the structure of the filtering device provided in the embodiments of this application;

[0028] Figure 4 This is a perspective view of the fixed valve structure provided in the embodiments of this application;

[0029] Figure 5This is an exploded view of the structure of the filtering device provided in the embodiments of this application from another perspective;

[0030] Figure 6 This is a schematic diagram of the valve plate of the filtration device provided in the embodiment of this application in the filtration state;

[0031] Figure 7 This is a schematic diagram of the valve plate of the filtration device provided in the embodiment of this application in the backwashing state;

[0032] Figure 8 This is a schematic diagram of the valve plate of the filtration device provided in the embodiment of this application in the bypass state;

[0033] Figure 9 This is a perspective view of another embodiment of the filtration device provided in this application;

[0034] Figure 10 This is an exploded view of the structure of a filter device according to another embodiment of the filter device provided in this application;

[0035] Figure 11 This is a schematic diagram of the fixed valve structure of another embodiment of the filtration device provided in this application;

[0036] The above figures include the following reference numerals:

[0037] 100. Lower housing; 110. Filter element; 111. Hollow flow channel; 120. Protruding wall; 121. Mounting platform;

[0038] 200. Upper housing; 210. Body; 211. Inlet channel; 212. Outlet channel; 213. Wastewater channel; 220. Receiving cavity; 221. Limiting groove; 230. Fixed valve assembly; 231. Limiting protrusion; 232. First opening; 233. Second opening; 234. Third opening; 235. Fourth opening; 236. Fifth opening; 237. Base; 238. Valve body; 238f. First through hole; 238g. Second through hole; 238h. Third through hole; 238i. Fourth through hole; 238j. Fifth through hole; 239. Fixed valve plate; 240. Water passage cavity;

[0039] 300. Cavity;

[0040] 400, Valve plate; 410, First chamber; 420, Second chamber; 430, First port; 440, Second port;

[0041] 500. Connecting part;

[0042] 600, Handle;

[0043] 700. Pressure relief valve. Detailed Implementation

[0044] This application provides a filtration device that at least solves one of the technical problems existing in the prior art. By controlling the valve plate 400, the filtration device can be adjusted to the backwash state to clean the filter element 110 and restore its filtration performance. The backwash water in the backwash state is provided by the inlet channel 211, and the flow rate and pressure of the backwash water are stable, which can significantly improve the backwash effect. The filtration device with this configuration has a simple structure, a good user experience, and strong product practicality. In addition, in this invention, the backwash water is flushed from the outside of the filter element 110 to the inside. The inner surface area of ​​the filter element 110 is smaller than the outer surface area. Therefore, under a certain flow rate, the flow velocity on the inner surface of the filter element 110 per unit area is greater than the flow velocity on the outer surface of the filter element 110. Compared with the general filtration device that filters from the inside of the filter element 110 to the outside, this invention has a better backwash effect.

[0045] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Please refer to the following: Figures 1 to 8 This embodiment provides a filtration device, including a lower housing 100, an upper housing 200, a filter element 110, and a valve plate 400. The upper housing 200 is mounted on the lower housing 100 to form a cavity 300 between the lower housing 100 and the upper housing 200. The upper housing 200 is provided with an inlet channel 211, an outlet channel 212, and a wastewater channel 213. The filter element 110 is disposed in the cavity 300, and a hollow channel 111 is provided in the filter element 110. The valve plate 400 is mounted on the upper housing 200, and the valve plate 400 enables the filtration device to be in a filtration state or a backwashing state. In the filtration state, valve plate 400 connects the inlet channel 211 and the hollow channel 111, and the outlet channel 212 and the cavity 300, so that the raw water in the hollow channel 111 flows into the cavity 300 after being filtered from the inside to the outside through filter element 110 and is discharged from the outlet channel 212. In the backwashing state, valve plate 400 connects the inlet channel 211 and the cavity 300 and connects the wastewater channel 213 and the hollow channel 111, so that the backwash water in the cavity 300 flows from the outside to the inside through filter element 110 and is backwashed into the hollow channel 111 and discharged from the wastewater channel 213.

[0047] As can be seen, the filtration device of this embodiment forms a cavity 300 between the lower housing 100 and the upper housing 200 by hollowing out the lower housing 100 and providing an opening at its top, and installing the upper housing 200 at the opening. A filter element 110 is disposed in the lower housing 100, and a hollow flow channel 111 is provided inside the filter element 110. The upper housing 200 is also provided with an inlet flow channel 211, an outlet flow channel 212, and a wastewater flow channel 213. The filtration device can be adjusted to either a filtration state or a backwashing state by using a valve plate 400. In the filtration state, the valve plate 400 connects the inlet flow channel 211 and the hollow flow channel 111, and connects the outlet flow channel 212 and the cavity 300. At this time, raw water enters through the inlet flow channel 211 and flows into the hollow flow channel 111. The raw water is filtered by the filter element 110 during its flow from the hollow flow channel 111 into the cavity 300. The purified water in the cavity 300 is then filtered by the filter element 110. The water outlet 212 flows out to supply the user. In the backwashing state, the valve plate 400 connects the inlet water outlet 211 and the cavity 300, and connects the wastewater outlet 213 and the hollow outlet 111. The backwash water enters from the inlet water outlet 211 and flows into the cavity 300. The backwash water in the cavity 300 enters from outside the filter element 110 into the hollow outlet 111 inside the filter element 110 to rinse the filter element 110 and the hollow outlet 111. Then the backwash water carrying impurities is discharged from the wastewater outlet 213. With this setting, the user can clean the filter element 110 to restore the filtration performance of the filter element 110 without disassembling the filter device. Moreover, the backwash water in the backwashing state is provided by the inlet water outlet 211. The flow rate and pressure of the backwash water are stable, which can significantly improve the backwashing effect. The filter device with this setting has a simple structure, a good user experience, and strong product practicality.

[0048] In this embodiment, the lower housing 100 is a hollow cylindrical structure with an opening at one end. The top of the outer peripheral surface of the lower housing 100 has an external thread, and the bottom of the inner peripheral surface of the upper housing 200 has an internal thread, allowing the upper housing 200 to be detachably mounted on the lower housing 100. The central axes of the upper housing 200 and the lower housing 100 are aligned, so that when the user needs to replace the filter element 110 or repair other components, the upper housing 200 can be unscrewed from the lower housing 100. This detachable structure is simple to implement. Furthermore, the filter element 110 has a cylindrical structure and is vertically arranged in the lower housing 100. The central axis of the filter element 110 coincides with the central axis of the lower housing 100. The filter element 110 can be an activated carbon filter element, a PP cotton filter element, or an ultrafiltration membrane filter element, etc., preferably a PP cotton filter element. PP cotton has the characteristics of strong dirt holding capacity, long service life, and low cost. An air bag can also be set in the cavity 300. By setting an air bag, the water hammer effect can be reduced. The air bag is a hollow thin film bag, which is the prior art and will not be described in detail here.

[0049] In this embodiment, the filter element 110 is configured with a dense inner surface and a sparse outer surface, specifically, the filter element 110 is configured with a pleated structure so that the outer surface area of ​​the filter element 110 is much larger than the inner surface area of ​​the filter element 110. The outer surface area of ​​the filter element 110 can be configured to be 8-30 times the inner surface area of ​​the filter element 110. In the backwashing state, the backwash water permeates from the outer surface of the filter element 110 to the inner surface of the filter element 110. The backwash water gradually gathers and pressurizes so that, in a certain flushing volume per unit area, the water flow velocity on the inner surface of the filter element 110 is greater than the water flow velocity on the outer surface of the filter element 110. Furthermore, the backwash water is continuously supplied by the inlet channel 211. This configuration increases the flow rate and pressure of the backwash water, thereby improving the flushing efficiency and flushing effect of the filtration device.

[0050] In this embodiment, the filtration precision of the filter element 110 is configured to gradually increase from the inside to the outside. In the filtration state, although the filtration precision of the raw water is gradually increasing, the space through which the raw water can pass is also increasing. This ensures that the filtration rate of the raw water is not greatly affected by the gradual increase in filtration precision, which is beneficial to improving the filtration effect.

[0051] In this embodiment, as Figures 1 to 8 As shown, a water passage chamber 240 is formed in the upper housing 200. The valve plate 400 is rotatably installed in the water passage chamber 240. By rotating the valve plate 400, the filter device can be put into a bypass state. In the bypass state, the inlet channel 211 and the outlet channel 212 are connected through the water passage chamber 240. In the bypass state, the raw water flowing in from the inlet channel 211 will not be filtered by the filter element 110 and will flow out from the outlet channel 212 to supply the user. This reduces the workload of the filter element 110, reduces the maintenance frequency of the filter element 110, increases the service life of the filter element, and reduces the user's operating costs in some usage scenarios with high water consumption and low water quality requirements. Furthermore, when the filter device needs to be maintained, switching the filter device to the bypass state will not cause a sudden water outage.

[0052] It is worth noting that, such as Figures 1 to 7 As shown, the backwashing and bypass states of the filter device can coexist. By adjusting the valve plate 400, the inlet channel 211 and the outlet channel 212 are connected, and the inlet channel 211 and the cavity 300 are also connected. The hollow channel 111 and the wastewater channel 213 are also connected. When the inlet channel 211 is opened, a portion of the raw water will flow into the outlet channel 212 to achieve the bypass effect, and another portion of the raw water will flow into the cavity 300 to achieve the backwashing effect. To ensure the backwashing efficiency and bypass efficiency of the filter device, the outlet channel 212 is usually closed when the filter device needs to perform the backwashing function, and the wastewater channel 213 is closed when the filter device needs to perform the bypass function.

[0053] In this embodiment, as Figure 8 As shown, the bypass state can also exist independently. The valve plate has a shut-off structure so that when the filter device switches to the bypass state, the valve plate can block the passage between the inlet channel 211 and the cavity 300.

[0054] Furthermore, such as Figures 1 to 5 As shown, the upper housing 200 includes a body 210 and a fixed valve assembly 230. The body 210 has a receiving cavity 220. The fixed valve assembly 230 is installed in the receiving cavity 220 to separate the receiving cavity 220 into a water passage cavity 240. The water passage cavity 240 is located between the top of the fixed valve assembly 230 and the inner wall of the body 210. This arrangement is beneficial for processing and assembling each component separately during the manufacturing process, improving production efficiency, reducing production costs, and also facilitating later maintenance and component replacement.

[0055] Furthermore, such as Figures 1 to 8 As shown, the inlet channel 211, outlet channel 212 and wastewater channel 213 are all connected to the water passage chamber 240 through the fixed valve assembly 230, and the hollow channel 111 and the cavity 300 are also connected to the water passage chamber 240 through the fixed valve assembly 230. The fixed valve assembly 230 includes a base 237, a valve body 238 and a fixed valve plate 239. The base 237 is limited and installed in the receiving cavity 220, the valve body 238 is installed on the upper surface of the base 237, and the fixed valve plate 239 is installed on the upper surface of the valve body 238.

[0056] The valve body 238 is hollow and has an opening at its top. Multiple partition plates are formed within the valve body 238, with one end of each partition plate connected to the bottom of the valve body 238 and the other end extending to the opening to form a mating surface on the top surface of the valve body 238. These partition plates divide the interior of the valve body 238 into at least an inlet chamber, an outlet chamber, a wastewater chamber, a raw water chamber, and a connecting chamber. The sidewall of the valve body 238 has a first through-hole 238f connecting to the inlet chamber, a second through-hole 238g connecting to the outlet chamber, and a third through-hole 238h connecting to the wastewater chamber. The bottom wall of body 238 is provided with a fourth through hole 238i that connects to the raw water chamber and a fifth through hole 238j that connects to the connecting chamber. The fourth through hole 238i is located at the center of the bottom of valve body 238, and the fifth through hole 238j is located at the eccentric part of the bottom of valve body 238. The inlet channel 211 and the outlet channel 212 are arranged coaxially. The axis of the wastewater channel 213 is arranged perpendicular to the axis of the inlet channel 211. The first through hole 238f is aligned with the inlet channel 211, the second through hole 238g is aligned with the outlet channel 212, and the third through hole 238h is aligned with the wastewater channel 213. Furthermore, in this embodiment, one or more of the inlet chamber, outlet chamber, wastewater chamber, raw water chamber, and connecting chamber can be provided. The shape and number of the first through hole 238f, the second through hole 238g, the third through hole 238h, the fourth through hole 238i, and the fifth through hole 238j can also be adjusted. Such simple replacements should also be within the protection scope of this invention. The outline of the fixed valve plate 239 coincides with the outline of the mating surface. Among them, the top of the inner wall of the hollow flow channel 111 extends upward with an annular protruding wall. A connecting structure is provided on the base 237. One end of the connecting structure is connected to the hollow flow channel 111, and the other end of the connecting structure is connected to the raw water chamber, so that the hollow flow channel 111 and the raw water chamber are connected.

[0057] In this embodiment, both the fixed valve plate 239 and the valve plate 400 are made of ceramic material. The valve plate 400 is pressed and installed on the fixed valve plate 239. The sealing performance between the fixed valve plate 239 and the valve plate 400 is good, so as to make the filtration device more stable.

[0058] Furthermore, such as Figures 1 to 8 As shown, a limiting protrusion 231 is provided vertically on the outer peripheral surface of the side wall of the fixed valve assembly 230, and a limiting groove 221 is provided vertically on the cavity wall of the receiving cavity 220, so that when the fixed valve assembly 230 is installed in the receiving cavity 220, the limiting protrusion 231 is inserted into the limiting groove 221 so that the fixed valve assembly 230 cannot rotate in the receiving cavity 220; in other embodiments, the fixed valve assembly 230 can be fixedly installed on the body 210 by welding, bonding or other methods.

[0059] Furthermore, such as Figures 1 to 8As shown, the top of the fixed valve assembly 230 has a first opening 232 communicating with the inlet channel 211, a second opening 233 communicating with the outlet channel 212, a third opening 234 communicating with the wastewater channel 213, a fourth opening 235 communicating with the hollow channel 111, and a fifth opening 236 communicating with the cavity 300. By rotating the valve plate 400, the filter device is put into the filtering state. In the filtering state, the valve plate 400 connects the first opening 232 with the fourth opening 235 and the fifth opening 236 with the second opening 233. In the backwashing state, the valve plate 400 connects the first opening 232 with the fifth opening 236 and the fourth opening 235 with the third opening 234. In the bypass state, the first opening 232 and the second opening 233 are connected.

[0060] In filtration mode, valve plate 400 connects the first opening 232 and the fourth opening 235, and simultaneously connects the fifth opening 236 and the second opening 233, allowing raw water to flow from the inlet channel 211 into the hollow channel 111. After being filtered by the filter element 110, the raw water becomes purified water, which flows out of the cavity 300 into the outlet channel 212, providing clean water to the user. In backwashing mode, valve plate 400 connects the first opening 232 and the fifth opening 236, and simultaneously connects the fourth opening 235 and the third opening 234, allowing water from the inlet channel 211 to flow into the cavity 300. Backwash water flows from the outside of the filter element 110 to the inside of the filter element 110, flushing the filter element 110 and the hollow channel 111, removing wastewater containing impurities from the wastewater. Water flows out through channel 213, effectively removing impurities accumulated on filter element 110, restoring its filtration performance, and extending its service life. In bypass mode, the first opening 232 and the second opening 233 are connected, allowing the inlet channel 211 and the outlet channel 212 to be directly connected. This ensures a normal water supply in case the filter element 110 needs to be replaced or repaired, or the filtration device malfunctions, preventing the user's normal water use from being affected by filtration device problems. Furthermore, in scenarios with high water consumption, such as swimming pools, car washes, or watering plants, the raw water does not pass through filter element 110, reducing the workload of filter element 110 and the frequency of filter element 110 replacement, thus lowering the user's operating costs.

[0061] Among them, the fourth opening 235 is located in the center, while the first opening 232, the second opening 233, the third opening 234, and the fifth opening 236 are located off-center.

[0062] Furthermore, the valve plate 400 has at least a first chamber 410 and a second chamber 420, as well as a first port 430 and a second port 440. In the filtration state, the first opening 232 and the fourth opening 235 are respectively connected to the first chamber 410, and the fifth opening 236 and the second opening 233 are respectively connected to the second chamber 420. In the backwashing state, the first opening 232 is set corresponding to the first port 430 and the fifth opening 236 is set corresponding to the second port 440, so that the first opening 232 and the fifth opening 236 are connected through the water passage chamber 240, and the fourth opening 235 and the third opening 234 are connected through the first chamber 410. In the bypass state, the first opening 232 is set corresponding to the first port 430 and the second opening 233 is set corresponding to the second port 440, so that the first opening 232 and the second opening 233 are connected through the water passage chamber 240.

[0063] Furthermore, the first chamber 410 and the second chamber 420 are formed by extending upwardly recessed from the bottom of the valve plate 400. With this structure, when processing the valve plate 400, only a simple recessed treatment is needed at its bottom to form the chambers. Compared with other complex structural designs, the processing technology is simpler, which can reduce processing difficulty and cost and improve production efficiency.

[0064] Furthermore, the valve plate 400 is pressed and installed on the fixed valve assembly 230 so that the bottom of the valve plate 400 fits against the top of the fixed valve assembly 230. The top of the valve plate 400 is provided with a connecting part 500, the top of the connecting part 500 protruding from the top of the upper housing 200. The top of the connecting part 500 is provided with a handle 600, so that the valve plate 400 can be driven to rotate by turning the handle 600, and the valve plate 400 can be rotated by twisting the handle 600. This manual operation method is simple and highly operable. The connecting part 500 and the operating handle 600 are detachable. Specifically, the top of the connecting part 500 is provided with a square protrusion, and the side circumferential surface of the operating handle 600 is provided with a square groove, so that the operating handle 600 can be detachably installed on the connecting part 500 by inserting the square protrusion into the square groove.

[0065] In one possible implementation, a motor is provided at the upper end of the connecting part 500, and the output shaft of the motor is driven to the connecting part 500 to electrically control the rotation of the valve plate 400.

[0066] In this embodiment, as Figures 1 to 8As shown, it also includes a pressure relief valve 700, which is disposed on the valve plate 400. One end of the pressure relief valve 700 is connected to the external atmosphere, and the other end is connected to the hollow flow channel 111. The pressure relief valve 700 can control the connection between the cavity 300 and the external atmosphere, so that when the upper housing 200 needs to be disassembled, the pressure relief valve 700 is first controlled to relieve pressure on the cavity 300. In other embodiments, the pressure relief valve 700 can also be installed in other positions. The installation position of the pressure relief valve 700 should not be regarded as a limitation of the present invention, provided that the pressure relief function can be realized.

[0067] In this embodiment, as Figure 2 As shown, the inner wall of the lower housing 100 extends radially inward to form a protruding wall 120, and an installation platform 121 is provided on the protruding wall 120. The installation platforms 121 are combined to form an installation plane, and the bottom of the filter element 110 is provided on the installation plane.

[0068] The bottom area of ​​filter element 110 is approximately equal to the area of ​​the mounting plane. The bottom of filter element 110 is set on the mounting plane, which allows for effective positioning and installation of filter element 110. This ensures that filter element 110 and lower housing 100 are coaxially arranged, guaranteeing the stability and accuracy of the internal structure of the filtration device. This prevents filter element 110 from shifting during operation, thus effectively performing its filtration function. During assembly, filter element 110 can be easily placed on mounting platform 121, improving assembly efficiency and facilitating the large-scale production and application of the filtration device.

[0069] In one possible implementation method, such as Figures 9 to 11 As shown, the valve body 238 has an inlet chamber, an outlet chamber, a wastewater chamber, a raw water chamber, and a connecting chamber inside. The difference is that the outlet chamber and the connecting chamber are connected within the valve body 238. The valve plate 400 has a first chamber 410, a first port 430, and a second port 440. In the filtration state, the first chamber 410 connects the inlet chamber and the raw water chamber. In the backwashing state, the first chamber 410 connects the raw water chamber and the wastewater chamber. At this time, the inlet chamber and the connecting chamber are connected through the connecting chamber. In the bypass state, the inlet chamber and the outlet chamber are connected. The valve plate 400 is in the same position in the backwashing state and the bypass state. Without controlling the external valve, the bypass or backwashing function cannot be implemented independently.

[0070] In one possible implementation method, such as Figures 9 to 11 As shown, there are two wastewater channels 213, which are coaxially arranged and the axes of the two wastewater channels 213 are perpendicular to the axis of the inlet channel 211. This allows the filter device to be switched to backwashing or bypass mode by rotating the valve plate 400 90 degrees in any direction during filtration.

[0071] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By hollowing out the lower housing 100 and providing an opening at its top, and installing the upper housing 200 at the opening to form a cavity 300 between the lower housing 100 and the upper housing 200, a filter element 110 is provided in the lower housing 100, and a hollow flow channel 111 is provided inside the filter element 110. The upper housing 200 is also provided with an inlet flow channel 211, an outlet flow channel 212, and a wastewater flow channel 213. The filter device can be adjusted to a filtration state or a backwashing state by means of the valve plate 400. In the filtration state, the valve plate 400 connects the inlet flow channel 211 and the hollow flow channel 111, and connects the outlet flow channel 212 and the cavity 300. At this time, raw water enters from the inlet flow channel 211 and flows into the hollow flow channel 111. The raw water is filtered by the filter element 110 during the process of flowing from the hollow flow channel 111 into the cavity 300. The purified water in 300 flows out through the outlet channel 212 to supply the user. In the backwashing state, the valve plate 400 connects the inlet channel 211 and the cavity 300, and connects the wastewater channel 213 and the hollow channel 111. The backwash water enters through the inlet channel 211 and flows into the cavity 300. The backwash water in the cavity 300 enters from outside the filter element 110 into the hollow channel 111 inside the filter element 110 to rinse the filter element 110 and the hollow channel 111. Then, the backwash water carrying impurities is discharged from the wastewater channel 213. With this setting, the user can clean the filter element 110 to restore its filtration performance without disassembling the filter device. Moreover, the backwash water in the backwashing state is provided by the inlet channel 211. The flow rate and pressure of the backwash water are stable, which can significantly improve the backwashing effect. The filter device with this setting has a simple structure, a good user experience, and strong product practicality.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, the terms "center", "upper", "lower", "front", "rear", "left", "right", "lateral", "longitudinal", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "set, connect, link, install" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0075] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] Furthermore, it should be noted that in the description of this invention, the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0077] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A filtration device, characterized in that, include: Lower housing; An upper housing is mounted on a lower housing to form a cavity between the lower housing and the upper housing. The upper housing is provided with an inlet channel, an outlet channel and a wastewater channel. A filter element, wherein the filter element is disposed in the cavity, and the filter element has a hollow flow channel; A valve plate, mounted on the upper housing, enables the filter device to be in either a filtration or backwashing state. In the filtration state, the valve plate connects the inlet channel and the hollow channel, and the outlet channel and the cavity, so that the raw water in the hollow channel flows into the cavity after being filtered from the inside to the outside by the filter element and is discharged from the outlet channel. In the backwashing state, the valve plate connects the inlet channel and the cavity, and also connects the wastewater channel and the hollow channel, so that the backwash water in the cavity flows from the outside to the inside by the filter element and is backwashed into the hollow channel and discharged from the wastewater channel.

2. The filtration device according to claim 1, characterized in that, A water passage cavity is formed in the upper housing, and the valve plate is rotatably installed in the water passage cavity. By rotating the valve plate, the filter device can be put into a bypass state. In the bypass state, the inlet channel and the outlet channel are connected through the water passage cavity.

3. The filtration device according to claim 2, characterized in that, The upper housing includes: The body, wherein a receiving cavity is provided; A fixed valve assembly is installed in the receiving cavity to separate the receiving cavity into a water passage chamber, the water passage chamber being located between the top of the fixed valve assembly and the inner wall of the body.

4. The filtration device according to claim 3, characterized in that, The outer peripheral sidewall of the fixed valve assembly is provided with a limiting protrusion along the vertical direction, and the cavity wall of the receiving cavity is provided with a limiting groove along the vertical direction, so that when the fixed valve assembly is installed in the receiving cavity, the limiting protrusion is inserted into the limiting groove so that the fixed valve assembly cannot rotate in the receiving cavity.

5. The filtration device according to claim 3, characterized in that, The valve plate is pressed and installed on the fixed valve assembly, with the bottom of the valve plate and the top of the fixed valve assembly in contact. The top of the valve plate is provided with a connecting part, the top of the connecting part protruding through the top of the upper housing, and the top of the connecting part is provided with a handle to drive the valve plate to rotate by turning the handle.

6. The filtration device according to claim 3, characterized in that, The inlet channel, outlet channel, and wastewater channel are all connected to the water passage cavity through the fixed valve assembly, and the hollow channel and the cavity are also connected to the water passage cavity through the fixed valve assembly.

7. The filtration device according to claim 6, characterized in that, The top of the fixed valve assembly has a first opening communicating with the inlet channel, a second opening communicating with the outlet channel, a third opening communicating with the wastewater channel, a fourth opening communicating with the hollow channel, and a fifth opening communicating with the cavity. Specifically, by rotating the valve plate to put the filter device into a filtering state, in the filtering state, the valve plate connects the first opening with the fourth opening and the fifth opening with the second opening. In the backwashing state, the valve plate connects the first opening with the fifth opening and the fourth opening with the third opening. In the bypass state, the first opening and the second opening are connected.

8. The filtration device according to claim 7, characterized in that, The valve plate has at least a first chamber and a second chamber, as well as a first port and a second port. In the filtration state, the first port and the fourth port are respectively connected to the first chamber, and the fifth port and the second port are respectively connected to the second chamber. In the backwashing state, the first port is configured to correspond to the first port and the fifth port is configured to correspond to the second port, so that the first port and the fifth port are connected through a water passage chamber, and the fourth port and the third port are connected through the first chamber. In the bypass state, the first port is configured to correspond to the first port and the second port is configured to correspond to the second port, so that the first port and the second port are connected through a water passage chamber.

9. The filtration device according to claim 8, characterized in that, The first chamber and the second chamber are formed by the bottom of the valve plate extending upwardly in a recessed manner.

10. The filtration device according to any one of claims 1 to 9, characterized in that, The inner wall of the lower housing extends radially inward to form a protruding wall, and an installation platform is provided on the protruding wall. The installation platforms are combined to form an installation plane, and the bottom of the filter element is disposed on the installation plane.

Images