Split detachable filter element and electroless reverse osmosis water purifier

Abstract

The utility model provides a split detachable filter element and an electroless reverse osmosis water purifier, and the split detachable filter element comprises a cylindrical double-layer composite filter element, an upper end cover and a lower end cover which are respectively fixed at the upper end and the lower end of the double-layer composite filter element, and a reverse osmosis membrane filter element which is detachably arranged in the double-layer composite filter element, a mounting cavity is formed in the double-layer composite filter element, and the reverse osmosis membrane filter element is concentrically arranged in the mounting cavity; an inserting opening is formed in the upper end cover, and the reverse osmosis membrane filter element can be inserted into the mounting cavity from top to bottom through the inserting opening; a filter element cover for covering the insertion opening is detachably mounted on the upper end cover, a positioning column is arranged on the filter element cover in a manner of extending towards the reverse osmosis membrane filter element, and a positioning groove matched with the positioning column is formed in the reverse osmosis membrane filter element; according to the split detachable filter element and the electroless reverse osmosis water purifier provided by the utility model, the defect that waste is easily caused due to the adoption of an integrated composite filter element is overcome.

Description

Technical Field

[0001] This utility model relates to the field of electricity-free reverse osmosis water purifiers, and in particular to a detachable filter element and an electricity-free reverse osmosis water purifier. Background Technology

[0002] With water resources receiving increasing attention, water purifiers have become essential equipment for ensuring the safety of household and industrial water use. Reverse osmosis water purifiers are highly favored for their ability to effectively remove impurities, bacteria, viruses, heavy metals, and other pollutants from water. Traditional reverse osmosis water purifiers typically require electricity, which presents limitations in areas with unstable or no power supply, and in scenarios where energy conservation and environmental protection are paramount. To overcome these issues, electricity-free reverse osmosis water purifiers have emerged, designed to achieve efficient water purification without relying on an external power source, providing users with a wider range of, more reliable, and more energy-efficient water purification solutions.

[0003] In electroless reverse osmosis water purifiers, the composite filter cartridge is the core component. Existing composite filter cartridges generally employ three-stage filtration, primarily consisting of a PP cotton filter cartridge, an activated carbon filter cartridge, and a reverse osmosis membrane filter cartridge, from the outside in. Current composite filter cartridges are typically a single unit, meaning the three cartridges are combined into one piece, requiring replacement of the entire cartridge. However, the outermost filter cartridge is most prone to fouling. Even if the outermost cartridge is dirty and has reached the end of its lifespan, the innermost reverse osmosis membrane filter cartridge may still be clean and not yet at the end of its lifespan. Replacing the entire cartridge can be wasteful and not environmentally friendly. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this utility model is to provide a detachable filter element and an electricity-free reverse osmosis water purifier, so as to overcome the defect that the existing composite filter element adopts an integrated design, which is prone to waste.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a detachable filter element, comprising a cylindrical double-layer composite filter element, an upper end cap and a lower end cap respectively fixed to the upper and lower ends of the double-layer composite filter element, and a reverse osmosis membrane filter element detachably installed inside the double-layer composite filter element. An installation cavity is formed within the double-layer composite filter element, and the reverse osmosis membrane filter element is concentrically arranged within the installation cavity. An insertion port is provided on the upper end cap, through which the reverse osmosis membrane filter element can be inserted from top to bottom into the installation cavity. A filter element cover for closing the insertion port is detachably installed on the upper end cap, and a positioning post extends from the filter element cover toward the reverse osmosis membrane filter element. A positioning groove matching the positioning post is provided on the reverse osmosis membrane filter element.

[0008] In some embodiments, the filter element cover is detachably connected to the upper end cover by a rotating snap-fit ​​mechanism. The outer circumferential wall of the upper end cover is provided with a plurality of rotating buckles at equal intervals, and the filter element cover is provided with a plurality of rotating slots that can engage with the rotating buckles.

[0009] In some embodiments, one end of the rotating buckle is provided with an arc-shaped anti-detachment protrusion, one side of the rotating slot is provided with an anti-detachment groove adapted to the anti-detachment protrusion, one side of the anti-detachment groove is provided with a stop block, and the side of the stop block opposite to the anti-detachment groove is provided with an inclined guide wall.

[0010] In some embodiments, the upper end of the filter element cover is provided with a petal-shaped screw-on part; a first sealing ring is fitted on the upper end cover, and the first sealing ring can be pressed tightly after the filter element cover is tightened.

[0011] In some embodiments, the dual-layer composite filter element includes an outer PP cotton filter layer and an inner activated carbon filter layer, the activated carbon filter layer being fixed inside the PP cotton filter layer; the reverse osmosis membrane filter element includes a product water pipe located at the center, and the positioning groove is disposed on the upper part of the product water pipe.

[0012] In some embodiments, the lower end cap extends upward and is provided with a limiting post, and the double-layer composite filter element is located outside the limiting post; the bottom of the reverse osmosis membrane filter element has a conical pad, and the conical pad is located inside the limiting post; a plurality of limiting plates are provided at equal intervals in an annular shape on the lower side of the lower end cap, and the limiting plates are used to limit the reverse osmosis membrane filter element to prevent it from falling out of the double-layer composite filter element.

[0013] This utility model also provides an electricity-free reverse osmosis water purifier, including the aforementioned detachable filter element, a cylindrical barrel, and a barrel cover detachably installed on the upper end of the barrel. An annular protrusion is provided inside the lower end of the barrel. The detachable filter element is detachably installed inside the barrel, and the lower end cover is inserted into the annular protrusion.

[0014] In some embodiments, a pure water pipe is provided at the center of the annular boss, and the pure water pipe is connected to the product water pipe of the reverse osmosis membrane filter element; a wastewater pipe and a raw water pipe are provided extending downward from the bottom of the barrel, the wastewater pipe is connected inside the annular boss, and the raw water pipe is connected outside the annular boss.

[0015] In some embodiments, a base is fixed to the bottom of the barrel, a four-way valve is fixed inside the base, the raw water pipe is connected to the four-way valve through a raw water pipeline, the pure water pipe is connected to the four-way valve through a pure water pipeline, and a wastewater pipeline is connected to the wastewater pipe.

[0016] In some embodiments, the cylinder cover is connected to the barrel by a threaded connection, and the opening at the upper end of the barrel is provided with an external thread, and the cylinder cover is threaded onto the external thread; a pressure post is provided at the center of the cylinder cover, and the pressure post is used to press down the filter element cover; a second sealing ring is installed between the cylinder cover and the barrel.

[0017] (III) Beneficial Effects

[0018] This utility model provides a detachable filter cartridge and an electricity-free reverse osmosis water purifier. The filter cartridge is detachable and can be installed inside the double-layer composite filter cartridge. In actual use, the double-layer composite filter cartridge or the reverse osmosis membrane filter cartridge can be selectively replaced according to the degree of dirt accumulation or service life. The filter cartridge components can be flexibly replaced without the need for complete scrapping, making it more environmentally friendly. The filter cartridge cover is connected to the upper cover by a snap-fit ​​method. Disassembly is only required by rotating the filter cartridge cover, making it easy to install and remove. This overcomes the defect of existing composite filter cartridges that are used in one piece and are prone to waste. Attached Figure Description

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

[0020] Figure 1 This is a perspective view of a detachable filter element according to the present invention.

[0021] Figure 2 This is a perspective view of the bottom of a detachable filter element according to the present invention.

[0022] Figure 3 This is an exploded view of a detachable filter element according to the present invention.

[0023] Figure 4 This is a cross-sectional view of a detachable filter element according to the present invention.

[0024] Figure 5 This is a perspective view of a detachable filter element cover according to the present invention.

[0025] Figure 6 This is a perspective view of the top cover of a detachable filter element according to the present invention.

[0026] Figure 7 This is a perspective view of an electric-free reverse osmosis water purifier according to the present invention;

[0027] Figure 8This is a perspective view of the bottom of a non-electric reverse osmosis water purifier according to the present invention;

[0028] Figure 9 This is a cross-sectional view of an electric-free reverse osmosis water purifier according to this utility model;

[0029] Figure 10 This is a perspective view of the bottom of the barrel of a non-electric reverse osmosis water purifier according to this utility model;

[0030] Figure 11 This is a structural schematic diagram of the bottom of the barrel of a non-electric reverse osmosis water purifier according to this utility model;

[0031] Figure 12 for Figure 11 A cross-sectional view taken along section AA;

[0032] The component names corresponding to the various labels in the diagram are as follows: 1. Double-layer composite filter element; 101. Installation cavity; 102. PP cotton filter layer; 103. Activated carbon filter layer; 2. Upper end cap; 201. Insertion port; 202. Rotary buckle; 203. Anti-detachment protrusion; 3. Lower end cap; 301. Limiting post; 302. Limiting plate; 4. Reverse osmosis membrane filter element; 401. Positioning groove; 402. Product water pipe; 5. Filter element cover; 501. Positioning post; 5 02. Rotary slot; 503. Anti-detachment groove; 504. Stop block; 505. Inclined guide wall; 506. Twisting part; 6. First sealing ring; 7. Machine barrel; 701. Annular boss; 702. Pure water pipe; 703. Wastewater pipe; 704. Raw water pipe; 705. External thread; 8. Cylinder cover; 801. Pressure column; 9. Base; 10. Four-way valve; 11. Raw water pipeline; 12. Pure water pipeline; 13. Wastewater pipeline; 14. Second sealing ring. Detailed Implementation

[0033] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0038] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0039] See Figures 1 to 6 This utility model provides a detachable filter element, including a cylindrical double-layer composite filter element 1, an upper end cap 2 and a lower end cap 3 fixed to the upper and lower ends of the double-layer composite filter element 1 respectively, and a reverse osmosis membrane filter element 4 detachably installed inside the double-layer composite filter element 1. The double-layer composite filter element 1 has a hollow structure, and an installation cavity 101 is formed inside the double-layer composite filter element 1. The reverse osmosis membrane filter element 4 is concentrically arranged in the installation cavity 101. An insertion port 201 is provided on the upper end cap 2, through which the reverse osmosis membrane filter element 4 can be inserted into the installation cavity 101 from top to bottom. Due to the presence of the conical pad, which has a larger diameter at the upper end and a smaller diameter at the lower end, the insertion method from top to bottom is more labor-saving and convenient. The upper cover 2 is detachably fitted with a filter element cover 5 for closing the insertion port 201. A positioning post 501 extends from the center of the filter element cover 5 toward the reverse osmosis membrane filter element 4. The reverse osmosis membrane filter element 4 has a positioning groove 401 that matches the positioning post 501. The positioning post 501 can be placed within the positioning groove 401, limiting the reverse osmosis membrane filter element 4 and keeping it in a vertical position. This structure uses a split filter element design. In actual use, the double-layer composite filter element or the reverse osmosis membrane filter element can be selectively replaced according to the level of dirt or service life. This allows for flexible replacement of filter element components without the need for complete disposal, making it more environmentally friendly.

[0040] In addition to adopting a split filter element structure, the size of filter elements that are prone to getting dirty can be increased to extend their service life, thus keeping their lifespan consistent with that of the innermost reverse osmosis membrane filter element. This way, when the entire filter element is replaced, all filter elements have reached their service life, avoiding waste. For example, the size of the PP cotton filter layer and activated carbon filter layer can be lengthened and thickened to extend their service life, making their lifespan consistent with that of the reverse osmosis membrane filter element. This facilitates overall disposal, avoids waste, and reduces the number of manual replacements.

[0041] In some embodiments, such as Figures 4 to 6 As shown, the filter element cover 5 is detachably connected to the upper cover 2 by a rotating snap-fit ​​mechanism. Disassembly and assembly are simple; just rotate the filter element cover 5. Multiple rotating snaps 202 are evenly spaced in a ring on the outer circumferential wall of the upper cover 2. The filter element cover 5 has multiple rotating slots 502 that engage with the rotating snaps 202. One end of each rotating snap 202 has an arc-shaped anti-detachment protrusion 203. One side of each rotating slot 502 has an anti-detachment groove 503 that matches the anti-detachment protrusion 203. A stop 504 protrudes from one side of the anti-detachment groove 503, and an inclined guide wall 505 is provided on the side of the stop 504 facing away from the anti-detachment groove 503.

[0042] When installing the filter element cover 5, as the rotating buckle 202 engages with the rotating groove 502, the anti-detachment protrusion 203, under the action of the inclined guide wall 505, can pass over the stop 504 and enter the anti-detachment groove 503. The stop 504 provides a certain degree of obstruction to the anti-detachment protrusion 203, preventing the filter element cover 5 from loosening during use and ensuring its reliability. When disassembling the filter element cover 5, if the force of rotating the filter element cover 5 exceeds the obstructing force of the stop 504, the anti-detachment protrusion 203 can pass over the stop 504, allowing the rotating buckle 202 to smoothly disengage from the rotating groove 502.

[0043] In some embodiments, such as Figures 3 to 6 As shown, the upper end of the filter element cover 5 is provided with a petal-shaped screwing part 506, which is convenient for people to hold and rotate. The upper cover 2 is fitted with a first sealing ring 6, which can be pressed against the first sealing ring 6 after the filter element cover 5 is tightened; the first sealing ring 6 ensures the airtightness of the connection between the filter element cover 5 and the upper cover 2.

[0044] In some embodiments, such as Figure 4 As shown, the double-layer composite filter element 1 includes an outer PP cotton filter layer 102 and an inner activated carbon filter layer 103, with the activated carbon filter layer 103 fixed inside the PP cotton filter layer 102; the reverse osmosis membrane filter element 4 includes a product water pipe 402 located in the center, with a positioning groove 401 disposed on the upper part of the product water pipe 402.

[0045] In some embodiments, such as Figures 2 to 4 As shown, the lower end cover 3 extends upward and is provided with a limiting post 301, and the double-layer composite filter element 1 is located outside the limiting post 301; the bottom of the reverse osmosis membrane filter element 4 has a conical pad (not shown in the figure), and the conical pad is located inside the limiting post 301; multiple limiting plates 302 are provided at equal intervals in an annular shape on the lower side of the lower end cover 3, and the limiting plates 302 are used to limit the reverse osmosis membrane filter element 4 to prevent it from falling out of the double-layer composite filter element 1.

[0046] See Figures 7 to 12 Based on the same inventive concept, this specification also provides an electricity-free reverse osmosis water purifier, including a detachable filter element as described in any of the foregoing embodiments, a cylindrical casing 7, and a casing cover 8 detachably mounted on the upper end of the casing 7. The casing 7 has a cavity inside and an opening at the top. An annular protrusion 701 is provided inside the lower end of the casing 7, and the detachable filter element is detachably mounted inside the casing 7. The lower end cover 3 is inserted into the annular protrusion 701. To ensure sealing, a sealing ring is installed on the lower end cover 3.

[0047] In some embodiments, such as Figures 9 to 12 As shown, a pure water pipe 702 is located at the center of the annular boss 701, and the pure water pipe 702 is connected to the product water pipe 402 of the reverse osmosis membrane filter element 4. A wastewater pipe 703 and a raw water pipe 704 extend downwards from the bottom of the casing 7. The wastewater pipe 703 is connected inside the annular boss 701, and the raw water pipe 704 is connected outside the annular boss 701. In use, raw water (tap water) enters the casing 7 through the raw water pipe 704, and then passes sequentially through the PP cotton filter layer 102, the activated carbon filter layer 103, and the reverse osmosis membrane filter element 4 for filtration. Finally, it flows out from the pure water pipe 702 through the product water pipe 402, and the wastewater produced by the reverse osmosis membrane filter element 4 flows out through the wastewater pipe 703.

[0048] In some embodiments, such as Figure 8 and Figure 10 As shown, a base 9 is fixed to the bottom of the barrel 7, and a four-way valve 10 is fixed inside the base 9. The four-way valve 10 is existing technology and will not be described in detail in this embodiment. The raw water pipe 704 is connected to the four-way valve 10 through the raw water pipe 11, and the pure water pipe 702 is connected to the four-way valve 10 through the pure water pipe 12; the wastewater pipe 703 is connected to the wastewater pipe 13. This structure, using pipe connections, is simpler than the traditional water circuit board structure, has lower manufacturing costs, and is also convenient for maintenance and troubleshooting.

[0049] In some embodiments, such as Figure 7 , Figure 9 and Figure 10As shown, the cover 8 is connected to the barrel 7 by a threaded connection. The upper opening of the barrel 7 is provided with an external thread 705, and the cover 8 is threaded onto the external thread 705. A pressure post 801 is provided at the center of the cover 8, which is used to press down the filter element cover 5. A second sealing ring 14 is installed between the cover 8 and the barrel 7 to ensure the sealing of the connection between the cover 8 and the barrel 7.

[0050] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A detachable filter element, characterized in that: The system includes a cylindrical double-layer composite filter element (1), an upper end cap (2) and a lower end cap (3) fixed to the upper and lower ends of the double-layer composite filter element (1) respectively, and a reverse osmosis membrane filter element (4) detachably installed inside the double-layer composite filter element (1). An installation cavity (101) is formed inside the double-layer composite filter element (1), and the reverse osmosis membrane filter element (4) is concentrically arranged within the installation cavity (101). An insertion port (201) is provided on the upper end cap (2). The reverse osmosis membrane filter element (4) can be inserted into the mounting cavity (101) from top to bottom through the insertion port (201); the upper end cover (2) is detachably installed with a filter element cover (5) for covering the insertion port (201), the filter element cover (5) extends toward the reverse osmosis membrane filter element (4) and is provided with a positioning post (501), and the reverse osmosis membrane filter element (4) is provided with a positioning groove (401) that matches the positioning post (501).

2. The detachable filter element as described in claim 1, characterized in that: The filter element cover (5) is detachably connected to the upper end cover (2) by a rotating snap-fit. The outer circumferential wall of the upper end cover (2) is provided with a plurality of rotating buckles (202) at equal intervals. The filter element cover (5) is provided with a plurality of rotating slots (502) that can engage with the rotating buckles (202).

3. The detachable filter element as described in claim 2, characterized in that: One end of the rotating buckle (202) is provided with an arc-shaped anti-detachment protrusion (203), and one side of the rotating slot (502) is provided with an anti-detachment groove (503) that is adapted to the anti-detachment protrusion (203). A stop (504) is provided protruding from one side of the anti-detachment groove (503), and an inclined guide wall (505) is provided on the side of the stop (504) away from the anti-detachment groove (503).

4. The detachable filter element as described in claim 1, characterized in that: The upper end of the filter element cover (5) is provided with a petal-shaped screw part (506); a first sealing ring (6) is fitted on the upper end cover (2), and the first sealing ring (6) can be pressed tightly after the filter element cover (5) is tightened.

5. The detachable filter element as described in claim 1, characterized in that: The double-layer composite filter element (1) includes an outer PP cotton filter layer (102) and an inner activated carbon filter layer (103), the activated carbon filter layer (103) being fixed inside the PP cotton filter layer (102); the reverse osmosis membrane filter element (4) includes a product water pipe (402) located in the center, and the positioning groove (401) is disposed on the upper part of the product water pipe (402).

6. The detachable filter element as described in claim 1, characterized in that: The lower end cap (3) extends upward and is provided with a limiting post (301), and the double-layer composite filter element (1) is located outside the limiting post (301); the bottom of the reverse osmosis membrane filter element (4) has a conical pad, and the conical pad is located inside the limiting post (301); a plurality of limiting plates (302) are provided at equal intervals in an annular shape on the lower side of the lower end cap (3), and the limiting plates (302) are used to limit the reverse osmosis membrane filter element (4) to prevent it from falling out of the double-layer composite filter element (1).

7. A non-electric reverse osmosis water purifier, characterized in that: The filter includes a detachable filter element as described in any one of claims 1 to 6, a cylindrical barrel (7), and a cap (8) detachably mounted on the upper end of the barrel (7). An annular protrusion (701) is provided inside the lower end of the barrel (7). The detachable filter element is detachably mounted inside the barrel (7), and the lower end cap (3) is inserted into the annular protrusion (701).

8. The non-electric reverse osmosis water purifier as described in claim 7, characterized in that: A pure water pipe (702) is provided at the center of the annular boss (701), and the pure water pipe (702) is connected to the product water pipe (402) of the reverse osmosis membrane filter element (4); a wastewater pipe (703) and a raw water pipe (704) are provided at the bottom of the barrel (7), the wastewater pipe (703) is connected to the inside of the annular boss (701), and the raw water pipe (704) is connected to the outside of the annular boss (701).

9. The non-electric reverse osmosis water purifier as described in claim 8, characterized in that: The bottom of the barrel (7) is fixed with a base (9), and a four-way valve (10) is fixed inside the base (9). The raw water pipe (704) is connected to the four-way valve (10) through the raw water pipeline (11), and the pure water pipe (702) is connected to the four-way valve (10) through the pure water pipeline (12). The wastewater pipe (703) is connected to the wastewater pipeline (13).

10. The non-electric reverse osmosis water purifier as described in claim 7, characterized in that: The cylinder cover (8) is connected to the machine barrel (7) by a threaded connection. The opening at the upper end of the machine barrel (7) is provided with an external thread (705), and the cylinder cover (8) is threaded onto the external thread (705). A pressure post (801) is provided at the center of the cylinder cover (8), and the pressure post (801) is used to press down the filter element cover (5). A second sealing ring (14) is installed between the cylinder cover (8) and the machine barrel (7).

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