A water purifier with a multi-stage filtration structure

Abstract

This invention discloses a water purifier with a multi-stage filtration structure, comprising a purifier housing and a purifier body. The purifier body is assembled inside the purifier housing and includes a multi-stage filtration structure. The multi-stage filtration structure includes a first-stage filter cartridge, a second-stage filter cartridge located downstream of the first-stage filter cartridge, and a third-stage filter cartridge located downstream of the second-stage filter cartridge. The third-stage filter cartridge has a channel for water filtration inside, and three filter valves are assembled at the ends of the channels. Each filter valve has a filter core assembly inside. This invention uses a movable component on the filter frame to allow water to be opened and closed by simply pulling the filter frame for maintenance, eliminating the need to shut off the water supply to the entire device, thereby improving the overall performance.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, specifically to a water purifier with a multi-stage filtration structure. Background Technology

[0002] With the improvement of residents' living standards and the enhancement of health awareness, water purification has become an important requirement in both household and commercial settings, and water purifiers, as core water purification equipment, are widely used. Although multi-stage filtration water purifiers on the market can remove impurities, odors, and harmful substances from water through layered filtration, there are still many technical pain points in actual use. Firstly, when replacing the internal filter components in traditional water purifiers, the entire water supply needs to be shut off, making maintenance relatively troublesome. Secondly, traditional water-blocking structures often use a single valve design, which has a slow linkage response and insufficient sealing when closed, making it easy for filtered water to flow back and contaminate the raw water. In addition, the sliding fit of the water-blocking components has low precision and suffers from severe wear.

[0003] Based on the above, this invention proposes a water purifier with a multi-stage filtration structure, which can effectively solve the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a water purifier with a multi-stage filtration structure, which solves the defects and deficiencies existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A water purifier with a multi-stage filtration structure includes a purifier housing and a purifier body. The purifier body is assembled inside the purifier housing and includes a multi-stage filtration structure. The multi-stage filtration structure includes a first-stage filter cartridge, a second-stage filter cartridge located downstream of the first-stage filter cartridge, and a third-stage filter cartridge located downstream of the second-stage filter cartridge. The third-stage filter cartridge has a channel for filtering water inside, and three filter valve bodies are assembled at the ends of the channels. Each filter valve body has a filter element assembly inside, and the side wall of each filter valve body has an opening a. The filter element assembly includes a filter frame installed inside the inlet a and a water-blocking component installed inside the filter valve body near the outlet. The filter frame is equipped with an RO reverse osmosis membrane. The water-blocking component includes a water-blocking plate with an outlet at its center. A groove is formed inside the outlet, and a sliding plate is fitted into the groove. A moving component is fitted onto the rear end of the filter frame's sidewall facing the water-blocking plate. The moving component cooperates with the sliding plate. A support component is fitted onto the rear sidewall of the filter frame, and a support plate is installed at the end of the support component. The support plate is fitted against the inner wall of the filter valve body.

[0007] Preferably, the movable component includes a support plate installed on the side wall of the filter frame. Both ends of the support plate are equipped with fixing posts. A hook a is installed on the side wall of one fixing post, and a hook b is installed on the side wall of the other fixing post. Grooves a and groove b are provided at both the upper and lower ends of the end side wall of the slide plate. The hooks a and hook b are arranged vertically. The hooks a and groove a cooperate with each other, and the hooks b and groove b cooperate with each other.

[0008] Preferably, both hook a and hook b have tapered ends, and both hook a and hook b have elastic rods installed on their rear sidewalls.

[0009] Preferably, the rear side wall of the water outlet has a receiving cavity, which is connected to the slide groove, and the slide plate is slidably installed in the receiving cavity.

[0010] Preferably, the side wall of the third-stage filter cartridge has a through hole b at the through opening a, the side wall of the filter frame is fitted with a sealing plate, the sealing plate is inserted into the through hole b, the adapter plate is connected to the drive plate, and the two side walls of the sealing plate and the outer wall of the third-stage filter cartridge are engaged by a snap-fit ​​structure.

[0011] Preferably, the snap-fit ​​structure includes snap-fit ​​blocks installed at both ends of the sealing plate and snap-fit ​​grooves opened on the outer wall of the third-stage filter cartridge. The snap-fit ​​blocks snap into the snap-fit ​​grooves, and the interior of the snap-fit ​​blocks is equipped with arched pads. Both sides of the outer walls of the snap-fit ​​blocks are provided with inclined convex surfaces, both sides of the inner walls of the snap-fit ​​grooves are provided with inclined concave surfaces, and the ends of the snap-fit ​​blocks are provided with arc-shaped surfaces.

[0012] Preferably, the support assembly includes a support body installed on the rear side wall of the filter frame and a balance plate installed on the side wall of the support plate. A support spring is installed between the balance plate and the support body. Balance rods are installed at both ends of the side wall of the balance plate. Balance cavities are opened at both ends of the side wall of the support body, and the balance rods are inserted into the balance cavities.

[0013] Preferably, the side wall of the balance plate is provided with an I-shaped groove, and the side wall of the support plate is equipped with an I-shaped slider, which is installed in the I-shaped groove.

[0014] Preferably, the outlet end of the filter valve body is provided with a filter water inlet, and the cross-sectional area of ​​the slide plate is larger than the cross-sectional area of ​​the filter water inlet.

[0015] Preferably, the water purifier body further includes a pressurization structure and a control structure, a display screen is mounted on the upper front side of the water purifier housing, and a control panel is mounted on the lower front side wall of the water purifier housing.

[0016] This invention provides a water purifier with a multi-stage filtration structure. It has the following beneficial effects:

[0017] 1. This invention sets up a filter valve body in the first-stage filter cylinder and sets up a filter frame and a water-blocking plate inside the filter valve body. Through the moving component on the filter frame, the sliding plate in the water-blocking plate can be driven to open and close when the filter frame is pulled out and pushed back, thereby realizing the water flow opening and closing of the filter valve body. This facilitates the maintenance of the filter frame. The water flow opening and closing of the filter valve body can be realized simply by pulling out the filter frame, without having to shut off the water supply to the whole body, thus improving the overall effect.

[0018] 2. The moving component precisely matches the grooves a and b of the slide plate via hooks a and b. The conical head design facilitates quick docking between the hooks and grooves, and the elastic rod enhances the fit of the hooks, enabling flexible linkage of the water-blocking component. The cross-sectional area of ​​the slide plate is larger than that of the filtered water inlet, and it is slidably assembled in the storage cavity, allowing for smooth sliding and tight sealing, effectively preventing backflow of filtered water, improving water-blocking reliability, and reducing the risk of secondary water pollution. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a water purifier with a multi-stage filtration structure according to the present invention;

[0020] Figure 2 This is a schematic diagram of the multi-stage filtration structure of a water purifier with a multi-stage filtration structure according to the present invention;

[0021] Figure 3 This is a schematic diagram of the filter valve body of a water purifier with a multi-stage filtration structure according to the present invention;

[0022] Figure 4 This is a schematic diagram of a filter element assembly for a water purifier with a multi-stage filtration structure according to the present invention;

[0023] Figure 5 This is a schematic diagram of a movable component of a water purifier with a multi-stage filtration structure according to the present invention;

[0024] Figure 6 This is a schematic diagram of a water-blocking component of a water purifier with a multi-stage filtration structure according to the present invention;

[0025] Figure 7 This is a schematic diagram of the water-blocking component engagement of a water purifier with a multi-stage filtration structure according to the present invention;

[0026] Figure 8 This is a schematic diagram of the snap-fit ​​structure of a water purifier with a multi-stage filtration structure according to the present invention;

[0027] Figure 9 This is a schematic diagram of a support component for a water purifier with a multi-stage filtration structure according to the present invention.

[0028] In the diagram: 1. Water purifier housing; 2. Water purifier main body; 3. Display screen; 4. Control panel; 5. First-stage filter cartridge; 6. Second-stage filter cartridge; 7. Pressurization structure; 8. Control structure; 9. Through hole b; 10. Snap-fit ​​structure; 11. Filter element assembly; 111. Filter frame; 112. RO reverse osmosis membrane; 113. Sealing plate; 114. Drive plate; 117. Water blocking assembly; 1171. Water blocking plate; 1172. Water outlet; 1173. Slide groove; 1174. Receiving cavity; 1175. Slide plate; 1176. Groove b; 1177. Groove a; 118. Support assembly; 1181. Support body ; 1182, Balance plate; 1183, Support spring; 1184, Balance chamber; 1185, Balance bar; 1186, I-shaped slide groove; 1187, I-shaped slider; 119, Support plate; 110, Moving component; 1101, Bearing plate; 1102, Fixed column; 1103, Hook a; 1104, Hook b; 1105, Conical head; 1106, Elastic rod; 12, Filter valve body; 13, Channel; 14, Filter water inlet; 15, Inlet a; 16, Locking block; 17, Locking groove; 18, Arched pad; 19, Circular arc surface; 20, Sloping convex surface; 21, Sloping concave surface; 22, Third stage filter cartridge. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example:

[0031] like Figure 1-8 As shown, this embodiment of the invention provides a water purifier with a multi-stage filtration structure, including a water purifier housing 1 and a water purifier body 2. The water purifier body 2 is assembled inside the water purifier housing 1. The water purifier body 2 includes a multi-stage filtration structure, which includes a first-stage filter cartridge 5, a second-stage filter cartridge 6 located downstream of the first-stage filter cartridge 5, and a third-stage filter cartridge 22 located downstream of the second-stage filter cartridge 6. The third-stage filter cartridge 22 is equipped with a channel 13 for filtering water. Three filter valve bodies 12 are assembled at the ends of the channel 13. Each filter valve body 12 is equipped with a filter element assembly 11. The side wall of the filter valve body 12 is provided with an opening a15. The filter element assembly 11 includes a filter frame 111 installed inside the opening a15 and a water-blocking component 117 installed inside the filter valve body 12 near the water outlet. An RO reverse osmosis membrane 112 is disposed inside the filter frame 111.

[0032] In practical applications, the water purifier housing 1 is a fully enclosed structure, made of food-grade ABS material through one-piece injection molding, with shock-absorbing buffer pads on the inner wall to fix the main body 2 of the water purifier and reduce vibration and noise during operation; the main body 2 of the water purifier is fixed to the mounting base on the inner wall of the water purifier housing 1 by bolts to ensure assembly stability. In the multi-stage filtration structure, the first-stage filter cartridge 5, the second-stage filter cartridge 6, and the third-stage filter cartridge 22 are connected in series via food-grade silicone tubing, and the internal filtration media of the three are designed differently: the channel 13 inside the first-stage filter cartridge 5 has a spiral flow guiding structure to achieve coarse filtration of large particulate impurities such as silt, rust, and insect eggs in the raw water; the second-stage filter cartridge 6 can be equipped with an activated carbon filter element as needed; the third-stage filter cartridge 22, together with the RO reverse osmosis membrane 112 and other fine filtration media in the filter frame 111, is used to remove small pollutants such as residual chlorine, odor, and heavy metal ions in the water. The third-stage filter cartridge 22 is equipped with a three-section filter valve body 12 and undergoes multiple RO reverse osmosis membrane filtration through three filter core components 11. The three-stage filtration forms a progressive purification process of coarse filtration-fine filtration to ensure that the quality of the effluent meets drinking water standards. The filter valve body 12 is made of brass with an anti-corrosion coating on the inner wall. The diameter of the port a15 is interference-fitted with the outer diameter of the filter frame 111, providing a basic positioning for the installation of the filter frame. The stroke must be fully adapted to the installation depth of the filter frame and the insertion and removal requirements of the sealing plate to ensure that the moving component accurately drives the slide plate to open when the filter frame is installed in place, and the slide plate synchronously resets when disassembled. Key dimensions of the filter frame: width: 60-80mm (adapted to the inner diameter of the port a15 of the first-stage filter cartridge); thickness: 15-20mm; sealing plate dimensions: integrally formed with the filter frame, width = filter frame width, thickness = 5-8mm.

[0033] The water-blocking assembly 117 includes a water-blocking plate 1171, with an outlet 1172 at the center of the water-blocking plate 1171. A sliding groove 1173 is provided inside the outlet 1172, and a sliding plate 1175 is fitted into the sliding groove 1173. A moving assembly 110 is fitted onto the rear end of the side wall of the filter frame 111 facing the water-blocking plate 1171. The moving assembly 110 cooperates with the sliding plate 1175. A support assembly 118 is fitted onto the rear side wall of the filter frame 111, and a support plate 119 is installed at the end of the support assembly 118. The support plate 119 is fitted against the inner wall of the filter valve body 12.

[0034] In practical applications, the water-blocking plate 1171 is a circular metal plate, welded and fixed to the inner wall of the filter valve body 12. The diameter of the outlet 1172 is consistent with the diameter of the filter water inlet 14, ensuring smooth water flow. The slide 1173 is a rectangular groove, the width of which matches the thickness of the slide plate 1175. The inner wall of the slide is coated with a polytetrafluoroethylene wear-resistant coating to reduce the frictional resistance when the slide plate slides. The slide plate 1175 is made of food-grade 304 stainless steel, with O-ring silicone sealing rings embedded on the edges to further improve sealing performance. The support plate 119 is an arc-shaped plate, the curvature of which is completely fitted to the inner wall of the filter valve body 12. Through the elastic support of the support component 118, it always maintains close contact with the inner wall of the valve body, limiting the radial displacement of the filter frame 111 and preventing misalignment of the RO reverse osmosis membrane 112 and the channel 13, which could lead to filtration failure. In practical applications, once the filter frame 111 is installed, the moving component 110 drives the sliding plate 1175 to slide along the slide groove 1173 into the receiving cavity 1174, and the water outlet 1172 is fully opened. When the filter frame 111 needs to be replaced, the moving component 110 resets, and the sliding plate 1175 slides out from the receiving cavity 1174, completely covering the water outlet 1172, blocking the water flow channel, and preventing the raw water from flowing back or the filtered water from being polluted again.

[0035] The movable component 110 includes a support plate 1101 installed on the side wall of the filter frame 111. Both ends of the support plate 1101 are equipped with fixing posts 1102. A hook a1103 is installed on the side wall of one fixing post 1102, and a hook b1104 is installed on the side wall of the other fixing post 1102. Grooves a1177 and groove b1176 are provided at both the upper and lower ends of the end side wall of the slide plate 1175. Hooks a1103 and hooks b1104 are arranged vertically. Hooks a1103 and grooves a1177 cooperate with each other, and hooks b1104 and grooves b1176 cooperate with each other.

[0036] In practical applications, the support plate 1101 is fixed to the side wall of the filter frame 111 with screws, and its length matches the width of the filter frame to ensure the installation stability of the fixing posts 1102 at both ends. The fixing posts 1102 are welded perpendicularly to the support plate 1101 and are made of high-strength aluminum alloy to ensure the load-bearing strength of hooks a1103 and b1104. The cone head 1105 is made of hard alloy and has a polished surface. Its cone-shaped structure can guide the hook to quickly embed into the corresponding groove during assembly, reducing the docking resistance. The elastic rod 1106 is an arc-shaped spring piece made of stainless steel. One end is welded to the rear side wall of the hook, and the other end abuts against the support plate 1101. After assembly, it is always in a pre-compressed state, providing continuous elastic pre-tightening force for the hook, ensuring that the hook fits tightly with the groove and avoiding detachment due to water flow impact or equipment vibration. Hooks a1103 and b1104 are symmetrically arranged vertically, and the corresponding grooves a1177 and b1176 are also symmetrically distributed vertically, ensuring that the sliding plate 1175 is subjected to balanced force during linkage and avoiding tilting and jamming. In actual operation, when pushing the filter frame 111 into the filter valve body 12 for installation, the cone head 1105 presses the end of the sliding plate 1175, causing the sliding plate to slide along the slide groove 1173 towards the receiving cavity 1174 until the hook is fully engaged in the groove. At this time, the sliding plate is in a fully open state. When disassembling the filter frame, the filter frame is pulled outward, and the hook is disengaged from the groove under the restoring force of the elastic rod 1106. The sliding plate is reset under its own gravity, closing the water outlet.

[0037] Both hooks a1103 and b1104 have cones 1105 installed at their ends. Both hooks a1103 and b1104 have elastic rods 1106 installed on their rear sidewalls. The rear sidewall of the outlet 1172 has a receiving cavity 1174. The receiving cavity 1174 is connected to the slide groove 1173. The slide plate 1175 is slidably installed in the receiving cavity 1174.

[0038] In practical applications, the receiving cavity 1174 is a cylindrical cavity located on the rear side wall of the water-blocking plate 1171. Its inner diameter is slightly larger than the outer diameter of the sliding plate 1175, ensuring that the sliding plate slides smoothly without jamming. The depth of the receiving cavity matches the length of the sliding plate 1175. When the sliding plate is fully opened, the entire sliding plate can be stored inside the cavity without obstructing the outlet 1172, ensuring the cross-sectional area for water flow and reducing water flow resistance. The inner wall of the receiving cavity 1174 is also coated with a wear-resistant and corrosion-resistant coating to reduce frictional wear during sliding and extend the service life of the components. The edges of the cavity opening are chamfered to avoid scratching the sealing ring on the surface of the sliding plate. In addition, the connection between the receiving cavity 1174 and the slide groove 1173 adopts a smooth transition design, ensuring smooth switching between the two and improving the response sensitivity of the water-blocking component.

[0039] The side wall of the third-stage filter cartridge 22 has a through hole b9 at the opening a15. The side wall of the filter frame 111 is fitted with a sealing plate 113, which is inserted into the through hole b9. The two side walls of the sealing plate 113 and the outer wall of the third-stage filter cartridge 22 are connected by a snap-fit ​​structure 10. The snap-fit ​​structure 10 includes snap-fit ​​blocks 16 installed at both ends of the sealing plate 113 and a slot 17 opened on the outer wall of the third-stage filter cartridge 22. The snap-fit ​​blocks 16 are snap-fitted into the slot 17. An arched pad 18 is fitted inside the snap-fit ​​blocks 16. The two outer walls of the snap-fit ​​blocks 16 are provided with inclined convex surfaces 20. The two inner walls of the slot 17 are provided with inclined concave surfaces 21. The end of the snap-fit ​​blocks 16 is provided with an arc surface 19.

[0040] In practical applications, through hole b9 is opened on the side wall of the third-stage filter cartridge 22. Its aperture is interference-fitted with the thickness of the sealing plate 113. The sealing plate 113 is made of food-grade silicone with an anti-slip surface. After insertion, it can initially block the connection between the through port a15 and the outside world to prevent water leakage. The drive plate 114 is integrally formed with the sealing plate 113 to ensure the stability of power transmission. In the snap-fit ​​structure 10, the snap-fit ​​block 16 is a rectangular structure, integrally injection molded with the sealing plate 113. The internal arched pad 18 is made of elastic rubber, which is in a slightly compressed state after assembly, generating a continuous elastic pre-tightening force to ensure a tight fit between the snap-fit ​​block 16 and the slot 17, enhancing the sealing effect. The inclined angles of the convex surface 20 and the concave surface 21 are both 30°-45°, which facilitates the sliding of the snap-fit ​​block 16 along the inclined surface during insertion and removal, and increases the contact area, improving sealing reliability. The radius of the arc surface 19 matches the radius of the slot 17, reducing frictional resistance during snap-fit, preventing damage to the edge of the slot or the end of the snap-fit ​​block, and extending the service life of the snap-fit ​​structure. When the sealing plate 113 is inserted into the through hole b9, the snap-fit ​​block 16, guided by the convex surface 20, presses against the concave surface 21 of the slot 17, and the arched pad 18 deforms slightly until the snap-fit ​​block is fully engaged in the slot, achieving a double-fixed seal.

[0041] The support assembly 118 includes a support body 1181 installed on the rear side wall of the filter frame 111 and a balance plate 1182 installed on the side wall of the support plate 119. A support spring 1183 is installed between the balance plate 1182 and the support body 1181. Balance rods 1185 are installed at both ends of the side wall of the balance plate 1182. Balance cavities 1184 are opened at both ends of the side wall of the support body 1181. The balance rods 1185 are inserted into the balance cavities 1184.

[0042] In practical applications, the support body 1181 is a rectangular frame structure, fixed to the rear side wall of the filter frame 111 by screws. It is made of high-strength engineering plastic, combining rigidity and lightweight. The balance plate 1182 is set parallel to the support body 1181, its length matching the width of the filter frame 111 to ensure balanced support. The support spring 1183 is made of stainless steel with anti-corrosion treatment. Its elastic coefficient is designed according to the impact force of water flow, effectively absorbing the impact force of water flow on the filter frame 111, preventing rigid collision between the filter frame and the filter valve body 12, and protecting the RO reverse osmosis membrane 112 from damage. The balance rod 1185 is a cylindrical structure, welded perpendicularly to the balance plate 1182. Its outer diameter is clearance-fitted with the inner diameter of the balance cavity 1184, allowing it to slide axially along the balance cavity, limiting the lateral displacement of the balance plate 1182 and ensuring the stability of the support.

[0043] The side wall of the balance plate 1182 is provided with an I-shaped groove 1186, and an I-shaped slider 1187 is installed on the side wall of the balance plate 1182. The I-shaped slider 1187 is installed in the I-shaped groove 1186.

[0044] In practical applications, the I-shaped groove 1186 and the I-shaped slider 1187 are connected by a sliding connection. The I-shaped structure prevents them from separating while ensuring relative sliding between the balance plate 1182 and the support plate 119, accommodating the expansion and contraction of the support spring 1183. The contact surfaces of the groove and the slider are coated with a lubricating coating to reduce sliding friction resistance. The inner wall of the support plate 119 is tightly fitted to the inner wall of the filter valve body 12. Through the elastic support of the support assembly 118, the position of the filter frame 111 can be adjusted in real time to ensure that the RO reverse osmosis membrane 112 is always aligned with the channel 13, ensuring consistent filtration accuracy.

[0045] The outlet end of the filter valve body 12 is provided with a filter water inlet 14, and the cross-sectional area of ​​the slide plate 1175 is larger than the cross-sectional area of ​​the filter water inlet 14.

[0046] In practical applications, the cross-sectional area of ​​the slide plate 1175 is 10%-15% larger than that of the water filter inlet 14, ensuring that when the slide plate is closed, its edge completely covers the port of the water filter inlet without any gaps. A food-grade silicone sealing gasket is attached to the side of the slide plate 1175 facing the water filter inlet. Under pressure, it can elastically deform to further fill any possible tiny gaps, improving sealing reliability and effectively preventing filtered water from flowing back into the filter valve body 12, thus avoiding secondary pollution caused by the mixing of raw water and purified water. In addition, the sliding stroke of the slide plate 1175 is limited by the length of the slide groove 1173, ensuring that the sealing gasket fits tightly against the port of the water filter inlet when closed and completely disengages from the port when open, without affecting the water flow efficiency.

[0047] The main body 2 of the water purifier also includes a pressurization structure 7 and a control structure 8. A display screen 3 is installed on the upper front side of the water purifier housing 1, and a control panel 4 is installed on the lower front side wall of the water purifier housing 1.

[0048] In practical applications, the booster structure 7 uses a miniature booster pump, which is installed at the inlet end of the third-stage filter cartridge 22 (not marked in the figure). The output pressure can be adjusted by the control structure 8 to increase the water flow rate. It is especially suitable for scenarios where multi-stage filtration leads to increased water flow resistance, ensuring stable water flow (rated flow ≥ 1.5L / min). The booster pump is made of corrosion-resistant alloy, meets drinking water contact standards, and has an operating noise ≤ 45dB, which does not affect the operating environment.

[0049] Control structure 8 is an integrated control motherboard installed inside the water purifier housing 1. It integrates a water flow sensor, a pressure sensor, and a filter life sensor (not shown in the figure), which can monitor the equipment's operating status in real time: the water flow sensor detects the purified water flow rate, the pressure sensor monitors the water pressure difference before and after filtration (when the water pressure difference exceeds a set threshold, the filter is determined to be clogged), and the filter life sensor records the filtered water volume. The remaining life of the filter is calculated through an algorithm. Control structure 8 is electrically connected to the display screen 3, control panel 4, and booster pump to realize data transmission and command execution.

[0050] Display screen 3 uses an LCD touch screen, which can intuitively display information such as water flow rate, remaining filter life, real-time water pressure, equipment working mode (such as normal water purification, fast water purification), and fault prompts (such as filter replacement, water leakage alarm), so that users can keep track of the equipment status in real time; Control panel 4 is a physical button design, including power button, mode switching button, filter reset button, manual drain button, etc., which is simple and easy to understand and suitable for users of different ages.

[0051] Working principle: When the user presses the power button on the control panel 4, the control structure 8 starts a self-test, pushes the sealing plate 113 into the through hole b9 of the third-stage filter cartridge 22, and the locking block 16 of the locking structure 10 automatically locks into the slot 17, completing the sealing of the through port a15; at the same time, the hook of the moving component 110 is embedded in the slide groove, driving the slide plate 1175 to slide into the receiving cavity 1174, the water outlet 1172 is fully opened, the micro booster pump of the booster structure 7 starts, and the equipment enters the standby state;

[0052] The user starts the filter replacement program through the control panel 4. The control structure 8 commands the booster pump to stop, pulls the sealing plate 113 in the reverse direction, and the locking block 16 disengages from the slot, opening the port a15. At the same time, when the filter frame 111 is pulled outward, the hook of the moving component disengages from the slide groove, and the slide 1175 resets and closes the outlet 1172 to prevent the raw water from flowing back. The user takes out the old filter frame, replaces it, and reinserts it.

[0053] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 invention 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, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0054] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A water purifier with a multi-stage filtration structure, characterized in that: It includes a water purifier shell (1) and a water purifier body (2); The main body (2) of the water purifier is assembled inside the housing (1) of the water purifier. The main body (2) of the water purifier includes a multi-stage filtration structure. The multi-stage filtration structure includes a first-stage filter cartridge (5), a second-stage filter cartridge (6) located downstream of the first-stage filter cartridge (5), and a third-stage filter cartridge (22) located downstream of the second-stage filter cartridge (6). The third-stage filter cartridge (22) is equipped with a channel (13) for filtering water. The end of the channel (13) is equipped with three filter valve bodies (12). Each filter valve body (12) is equipped with a filter core assembly (11). The side wall of the filter valve body (12) is provided with a through port a (15). The filter core assembly (11) includes a filter frame (111) installed inside the through port a (15) and a water-blocking assembly (117) installed inside the filter valve body (12) near the water outlet. The filter frame (111) is provided with an RO reverse osmosis membrane (112). The water-blocking assembly (117) includes a water-blocking plate (1171), an outlet (1172) is provided at the center of the water-blocking plate (1171), a sliding groove (1173) is provided in the outlet (1172), a sliding plate (1175) is fitted in the sliding groove (1173), a moving assembly (110) is fitted at the rear end of the side wall of the filter frame (111) facing the water-blocking plate (1171), the moving assembly (110) cooperates with the sliding plate (1175), a support assembly (118) is fitted on the rear side wall of the filter frame (111), a support plate (119) is installed at the end of the support assembly (118), and the support plate (119) is fitted to the inner wall of the filter valve body (12).

2. A water purifier with a multi-stage filtration structure according to claim 1, characterized in that: The moving component (110) includes a support plate (1101) installed on the side wall of the filter frame (111). Both ends of the support plate (1101) are equipped with fixed posts (1102). A hook a (1103) is installed on the side wall of one side of the fixed post (1102), and a hook b (1104) is installed on the side wall of the other side of the fixed post (1102). The upper and lower ends of the end side wall of the slide plate (1175) are provided with grooves a (1177) and grooves b (1176). The hooks a (1103) and b (1104) are arranged vertically. The hooks a (1103) and grooves a (1177) cooperate with each other, and the hooks b (1104) and grooves b (1176) cooperate with each other.

3. A water purifier with a multi-stage filtration structure according to claim 2, characterized in that: Both hook a (1103) and hook b (1104) are equipped with cones (1105) at their ends, and both hook a (1103) and hook b (1104) are equipped with elastic rods (1106) on their rear sidewalls.

4. A water purifier with a multi-stage filtration structure according to claim 1, characterized in that: The rear side wall of the outlet (1172) is provided with a receiving cavity (1174), the receiving cavity (1174) is connected to the slide groove (1173), and the slide plate (1175) is slidably installed in the receiving cavity (1174).

5. A water purifier with a multi-stage filtration structure according to claim 1, characterized in that: The side wall of the third-stage filter cylinder (22) has a through hole b (9) at the through opening a (15). The side wall of the filter frame (111) is equipped with a sealing plate (113). The sealing plate (113) is inserted into the through hole b (9). The two side walls of the sealing plate (113) and the outer wall of the third-stage filter cylinder (22) are connected by a snap-fit ​​structure (10).

6. A water purifier with a multi-stage filtration structure according to claim 5, characterized in that: The snap-fit ​​structure (10) includes snap-fit ​​blocks (16) installed at both ends of the sealing plate (113) and snap-fit ​​grooves (17) opened on the outer wall of the third-stage filter cylinder (22). The snap-fit ​​blocks (16) are snapped into the snap-fit ​​grooves (17). An arched pad (18) is installed inside the snap-fit ​​blocks (16). The outer walls on both sides of the snap-fit ​​blocks (16) are provided with inclined convex surfaces (20). The inner walls on both sides of the snap-fit ​​grooves (17) are provided with inclined concave surfaces (21). The end of the snap-fit ​​blocks (16) is provided with an arc surface (19).

7. The first water purifier with a multi-stage filtration structure according to claim 1, characterized in that: The support assembly (118) includes a support body (1181) installed on the rear side wall of the filter frame (111) and a balance plate (1182) installed on the side wall of the support plate (119). A support spring (1183) is installed between the balance plate (1182) and the support body (1181). Balance rods (1185) are installed at both ends of the side wall of the balance plate (1182). Balance cavities (1184) are opened at both ends of the side wall of the support body (1181). The balance rods (1185) are inserted into the balance cavities (1184).

8. A water purifier with a multi-stage filtration structure according to claim 7, characterized in that: The side wall of the balance plate (1182) is provided with an I-shaped groove (1186), and the side wall of the support plate (1182) is provided with an I-shaped slider (1187), which is installed in the I-shaped groove (1186).

9. A water purifier with a multi-stage filtration structure according to claim 1, characterized in that: The filter valve body (12) is provided with a filter water inlet (14) at the water outlet end, and the cross-sectional area of ​​the slide plate (1175) is larger than the cross-sectional area of ​​the filter water inlet (14).

10. A water purifier with a multi-stage filtration structure according to claim 1, characterized in that: The main body (2) of the water purifier also includes a pressurization structure (7) and a control structure (8). A display screen (3) is installed on the upper front side of the water purifier housing (1), and a control panel (4) is installed on the lower front side wall of the water purifier housing (1).

Images