A front and rear filter module can be replaced individually integrated filter core

Abstract

The utility model discloses a front and rear filter module can be individually replaced integrated filter core, include: filter bottle, its top wall is provided with the installation mouth and its bottom wall is provided with pure water export and concentrated water export, RO filter module, it is installed in filter bottle, including inner tube, RO film, upper end cover and lower end cover, front and rear filter module, through the installation mouth of filter bottle, it is detachable and is installed in the inner tube, including main casing, front filter subassembly and rear filter subassembly, and the spacer that is divided into front chamber and rear chamber is arranged in main casing and divides the cavity up and down, and front filter subassembly is annular structure and installs in front chamber, and main casing has the plug cover and is provided with raw water import on the plug cover, and rear filter subassembly is annular structure and installs in rear chamber. The utility model discloses front and rear filter module can be individually removed, replace from filter bottle conveniently, and maintenance cost and use cost are greatly reduced, and the sealing of each waterway in filter core inside is also guaranteed simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, and in particular to an integrated filter element with replaceable pre- and post-filter modules. Background Technology

[0002] As we all know, reverse osmosis water purifiers are common water purification devices in people's daily lives. They mainly consist of a pre-filter, a post-filter, and an RO membrane filter. The pre-filter, RO membrane filter, and post-filter are usually installed at the beginning, middle, and end of the water circuit of the reverse osmosis water purifier, respectively. The water entering the water purifier first undergoes primary filtration through the pre-filter, then undergoes fine filtration through the RO membrane filter, then undergoes post-filter to improve the taste, and finally flows to the terminal for user use.

[0003] In existing technologies, to accommodate the miniaturized design of water purification equipment, pre-filters, post-filters, and RO membrane filters are often combined into an integrated filter cartridge. However, because RO membrane filters have a long lifespan while pre- and post-filters have short lifespans, the entire filter cartridge needs to be replaced when the pre- and post-filters reach the end of their lifespan. This results in waste of the RO membrane, increasing filter replacement costs and user operating expenses, indicating room for improvement. Utility Model Content

[0004] The present invention aims to overcome the defects in the prior art by providing an integrated filter element with replaceable pre- and post-filter modules. Its structure is simple and reasonable, and the pre- and post-filter modules can be easily disassembled and replaced from the filter bottle, thus greatly reducing maintenance costs. At the same time, the RO filter module, the pre- and post-filter modules and the filter bottle are tightly and reliably matched, effectively ensuring the sealing of each water passage inside the filter element.

[0005] To achieve the above objectives, this utility model provides an integrated filter element with replaceable pre- and post-filter modules, comprising: A filter bottle, wherein an installation port is provided in the middle of the top wall of the filter bottle and a pure water outlet and a concentrated water outlet are provided in sequence from the middle to the outside of the bottom wall; a first partition ring and a second partition ring are provided on the upper surface of the bottom wall of the filter bottle corresponding to the pure water outlet and the concentrated water outlet, and a third partition ring is provided on the outer periphery of the concentrated water outlet; the first, second and third partition rings are arranged in a concentric circle structure. An RO filtration module, installed inside a filter bottle, includes an inner cylinder, an RO membrane disposed outside the inner cylinder, and an upper end cap and a lower end cap respectively fitted onto the upper and lower ends of the RO membrane. The lower end cap has an opening for the inner cylinder to pass through, and a downwardly extending first flange is provided on the outer periphery of the opening. The first flange is sealed and connected to the inner wall of a third partition ring, and the lower end of the inner cylinder is sealed and connected to the inner wall of a second partition ring, so that the first flange and the inner cylinder cooperate to form a concentrate outlet channel connected to the concentrate outlet. The pre- and post-filter modules are detachably installed in the inner cylinder through the filter bottle mounting port. They include a main housing, a pre-filter assembly, and a post-filter assembly. The main housing has a relatively closed cavity inside and is provided with a partition that divides the cavity into a pre-cavity and a post-cavity. The pre-filter assembly is a ring-shaped structure that filters water from the outside to the inside. It is installed in the pre-filter chamber and divides the pre-filter chamber into an external raw water chamber and an internal pre-filter chamber. The top of the main housing is provided with a pre-filter channel for connecting the filter bottle cavity and the pre-filter chamber. The top of the main housing is connected to a plug for sealing the filter bottle mounting port, and the plug is provided with at least one raw water inlet extending downward from its upper surface and penetrating the raw water chamber; The bottom wall of the rear chamber is provided with a first water passage hole in the middle. The rear filter assembly is a ring structure that filters water from the outside to the inside and is installed in the rear chamber outside the first water passage hole. The rear filter assembly divides the rear chamber into an external fine filtration chamber and an internal pure water chamber. At least one interconnected fine filtration water channel is constructed between the inner cylinder wall and the peripheral wall of the rear chamber. The lower surface of the bottom wall of the rear cavity is provided with a second flange corresponding to the outer periphery of the first water passage hole. The second flange is sealed and connected to the inner wall of the first partition ring to form a pure water outlet channel for pure water to flow out.

[0006] The main housing is further configured as follows: the main housing includes a connecting seat, an upper barrel body connected to the upper part of the connecting seat to form a front cavity, and a lower barrel body connected to the lower part of the connecting seat to form a rear cavity, and the plug is integrally connected to the top wall of the upper barrel body.

[0007] Further configured as follows: the upper barrel body has a number of upper slots spaced around its lower port on its circumferential wall, and the upper part of the connecting seat has a number of upper buckles that correspond one-to-one with the upper slots for fastening. And / or, the lower barrel body has a number of lower latches spaced around its upper port on its peripheral wall, and the lower part of the connecting seat has a number of lower buckles that correspond one-to-one with the lower latches.

[0008] The lower barrel wall and the inner barrel wall are arranged at a distance to form a transition cavity. The inner barrel is provided with a plurality of first connecting holes communicating with the transition cavity, and the lower barrel is provided with a plurality of second connecting holes communicating with the transition cavity.

[0009] A further configuration is provided: a constricted section is provided on the inner wall of the inner cylinder at the lower part of the connecting seat, and the constricted section is sealed and connected to the lower part of the connecting seat.

[0010] The upper barrel is further configured such that a second water passage hole communicating with the primary filtration chamber is provided on the top wall of the upper barrel, and the plug is provided with a transversely connected passage between the second water passage hole and the inner cavity of the filter bottle.

[0011] The plug is further configured such that the mounting port of the filter bottle is connected by an interference fit, a rotary snap-fit, or a threaded fit.

[0012] Compared with existing technologies, its structure is simple and reasonable. The pre- and post-filter modules can be easily disassembled and replaced from the filter bottle, which greatly reduces maintenance costs. At the same time, the RO filter module, the pre- and post-filter modules and the filter bottle are tightly and reliably matched, which effectively ensures the sealing of each water passage inside the filter element. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the axial separation structure of an integrated filter element with replaceable front and rear filter modules according to this utility model. Figure 2 This is a schematic diagram of the axial cross-sectional structure of an integrated filter element; Figure 3 This is a schematic diagram of the separate structure of the pre- and post-filter modules.

[0014] The following reference numerals are marked on the accompanying drawings: 10. Filter bottle; 11. Mounting port; 12. Pure water outlet; 13. Concentrate outlet; 14. First partition ring; 15. Second partition ring; 16. Third partition ring; 20. RO filter module; 21. Inner cylinder; 211. Narrowed section; 212. First connecting hole; 22. RO membrane; 23. Top end cap; 24. Bottom end cap; 241. First flange; 30. Front and rear filter modules; 31. Main housing; 311. Connecting base; 3111, upper buckle; 3112, lower buckle; 312, upper tank body; 3121, second water passage hole; 3122, upper latch; 313, lower tank body; 3131, first water passage hole; 3132, second flange; 3133, lower latch; 3134, second connecting hole; 32, pre-filter assembly; 33, post-filter assembly; 34, plug; 341, raw water inlet; 342, guide port; H1, filter bottle inner cavity; H2, pre-filter cavity; H21, raw water cavity; H22, primary filtered water cavity; H3, post-filter cavity; H31, fine filtration cavity; H32, pure water cavity; H4, transition cavity. Detailed Implementation

[0015] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0016] This utility model discloses an integrated filter element with replaceable pre- and post-filter modules, such as... Figure 1 and Figure 2 As shown, the system includes a filter bottle 10, an RO filter module 20, and pre- and post-filter modules 30. The filter bottle 10 is hollow and has an inner cavity H1 for installing the RO filter module 20 and the pre- and post-filter modules 30. An installation port 11 is provided in the middle of the top wall of the filter bottle 10, and a pure water outlet 12 and a concentrated water outlet 13 are sequentially arranged from the middle outwards on its bottom wall. The RO filter module 20 has a ring-shaped structure and is installed on the outer periphery of the installation port 11. The pre- and post-filter modules 30 are detachably installed in the inner hole of the RO filter module 20 through the installation port 11. This allows the pre- and post-filter modules 30 to be disassembled and replaced individually, greatly reducing maintenance and operating costs. The pre- and post-filter modules 30 include a pre-filter assembly 32 located at the top and a post-filter assembly 30 located at the bottom. 3. A plug 34 for sealing the mounting port 11 of the filter bottle 10. The plug 34 is connected to the mounting port 11 of the filter bottle 10 by interference fit, rotation snap-fit, or threaded fit. The plug 34 is provided with a raw water inlet 341 for external raw water to flow in. This structure allows the water in the filter element to flow through the pre-filter assembly 32, the RO filter module 20, and the post-filter assembly 33 in sequence. The pre-filter assembly 32 is used to perform preliminary filtration of the raw water to obtain pre-filtered water. The RO filter module 20 performs fine filtration of the pre-filtered water to obtain finely filtered water and concentrated water. The post-filter assembly 33 is used to perform final filtration of the finely filtered water to obtain pure water. The pure water and concentrated water generated in this process flow out from the pure water outlet 12 and the concentrated water outlet 13, respectively.

[0017] In this embodiment, as Figure 2 As shown, a first separating ring 14 and a second separating ring 15 are provided on the upper surface of the bottom wall of the filter bottle 10 between the pure water outlet 12 and the concentrated water outlet 13, and a third separating ring 16 is provided on the outer periphery of the concentrated water outlet 13. The first separating ring 14, the second separating ring 15 and the third separating ring 16 are arranged in a concentric circle structure. This arrangement ensures the concentricity of the installation between the RO filter module 20 and the front and rear filter modules 30.

[0018] In this embodiment, as Figure 1 and Figure 2As shown, the RO filter module 20 includes an inner cylinder 21, an RO membrane 22 disposed outside the inner cylinder 21, and an upper end cap 23 and a lower end cap 24 respectively fitted onto the upper and lower ends of the RO membrane 22. The lower end cap 24 is provided with an opening for the inner cylinder 21 to pass through, and a downwardly extending first flange 241 is provided on the outer periphery of the opening. The first flange 241 is sealed and connected to the inner wall of the third partition ring 16, and the lower end of the inner cylinder 21 is sealed and connected to the inner wall of the second partition ring 15, so that the first flange 241 and the inner cylinder 21 cooperate to form a concentrated water outlet channel connected to the concentrated water outlet 13. Thus, the concentrated water generated by the RO filter module 20 first passes through the gap between the opening and the inner cylinder 21, and then flows out through the concentrated water outlet channel from the concentrated water outlet 13. Preferably, sealing rings are provided between the first flange 241 and the third partition ring 16, and between the inner cylinder 21 and the second partition ring 15 to ensure sealing.

[0019] In this embodiment, as Figure 2 and Figure 3 As shown, the pre- and post-filter modules 30 include a main housing 31, a pre-filter assembly 32, a post-filter assembly 33, and a plug 34. The plug 34 is used to seal the mounting port 11 of the filter bottle 10 so that a relatively closed filter bottle cavity H1 is formed inside the filter bottle 10. The main housing 31 has a relatively closed cavity inside and is provided with a separator that divides the cavity into a pre-filter cavity H2 and a post-filter cavity H3. The pre-filter assembly 32 is a ring-shaped structure for water filtration from the outside to the inside. It is installed in the pre-filter cavity H2 and divides the pre-filter cavity H2 into a raw water cavity H21 located on the outside and a primary filtered water cavity H22 located on the inside. The top of the main housing 31 is provided with a primary filtered water channel for connecting the filter bottle cavity H1 and the primary filtered water cavity H22. The top of the main housing 31 is connected to the plug 34 for sealing the mounting port 11 of the filter bottle 10. The upper surface of the plug 34 is provided with at least one [missing information] along its outer periphery. A raw water inlet 341 extends downward from the upper surface and connects to the raw water chamber H21; a first water passage hole 3131 is provided in the middle of the bottom wall of the rear chamber H3; the rear filter assembly 33 is a ring structure for water filtration from the outside to the inside and is installed in the rear chamber H3 outside the first water passage hole 3131. The rear filter assembly 33 divides the rear chamber H3 into an external fine filtration chamber and an internal pure water chamber H32. At least one connected fine filtration water channel is constructed between the inner cylinder 21 wall and the peripheral wall of the rear chamber H3. A second flange 3132 is provided on the lower surface of the bottom wall of the rear chamber H3 corresponding to the outer periphery of the first water passage hole 3131. The second flange 3132 is sealed and connected to the inner wall of the first partition ring 14 to form a pure water channel for pure water to flow out; preferably, a sealing ring is provided between the second flange 3132 and the first partition ring 14 to ensure sealing.

[0020] The water flow path inside the integrated filter element described above is as follows: external raw water flows into the raw water chamber H21 through the raw water inlet 341 of the plug 34 and is filtered from the outside to the inside by the pre-filter assembly 32, becoming pre-filtered water that enters the pre-filter chamber H22. The pre-filtered water in the pre-filter chamber H22 flows into the filter bottle inner cavity H1 through the pre-filter channel formed by the second water passage 3121 and the guide port 342. Then, the pre-filtered water is filtered and separated into fine filtered water and concentrated water by the RO membrane 22 of the RO filter module 20. The concentrated water flows out through the concentrated water outlet channel, and the fine filtered water flows out through the concentrated water outlet channel. The water flows into the fine water chamber H31 through the fine water channel and is filtered from the outside to the inside by the post-filter assembly 33, then converted into pure water and enters the pure water chamber H32. Finally, it flows out through the pure water outlet channel. That is, raw water inlet 341 (raw water) → raw water chamber H21 → pre-filter assembly 32 → primary water chamber H22 (primary filtered water) → filter bottle inner chamber H1 → RO membrane 22 (fine filtered water) → fine water channel → fine water chamber H31 → post-filter assembly 33 → pure water chamber H32 → pure water outlet channel → pure water outlet 12, RO membrane 22 (concentrated water) → concentrated water outlet channel → concentrated water outlet 13.

[0021] In this embodiment, as Figure 3 As shown, the main housing 31 includes a connecting seat 311, an upper barrel 312 connected to the upper part of the connecting seat 311 to form a front cavity H2, and a lower barrel 313 connected to the lower part of the connecting seat 311 to form a rear cavity H3. Specifically, the upper barrel 312 has a plurality of upper slots 3122 spaced around its lower port on its peripheral wall, and the lower barrel 313 has a plurality of lower slots 3133 spaced around its upper port on its peripheral wall. The upper and lower parts of the connecting seat 311 are respectively provided with a plurality of slots connected to the upper slots. The upper buckle 3111 and the lower buckle 3112 are connected one-to-one with the lower buckle 3122 and the lower buckle 3133 respectively; the lower barrel 313 is provided with a second water passage 3121 on the top wall corresponding to the annular hole of the pre-filter assembly 32; the plug 34 is integrally connected to the top wall of the upper barrel 312 and the part of the plug 34 corresponding to the filter bottle 10 is provided with a guide port 342 that connects the second water passage 3121 and the inner cavity H1 of the filter bottle. In this way, the second water passage 3121 and the guide port 342 cooperate to form a primary water filtration channel.

[0022] In this embodiment, as Figure 2As shown, the barrel wall of the lower barrel 313 and the barrel wall of the inner cylinder 21 are arranged at a distance to form a transition cavity H4. The inner cylinder 21 is provided with a plurality of first connecting holes 212 communicating with the transition cavity H4, and the lower barrel 313 is provided with a plurality of second connecting holes 3134 communicating with the transition cavity H4. The first connecting holes 212, the transition cavity H4 and the second connecting holes 3134 cooperate to form a fine filtration water channel. Preferably, the inner wall of the inner cylinder 21 is provided with a constricted section 211 at the lower part of the connecting seat 311. The constricted section 211 is sealed and connected to the lower part of the connecting seat 311, and preferably a sealing ring is provided between the two to ensure the sealing performance. This makes it easier for the barrel wall of the lower barrel 313 and the barrel wall of the inner cylinder 21 to be arranged at a distance to form a relatively closed transition cavity H4.

[0023] Compared with existing technologies, its structure is simple and reasonable. The pre- and post-filter modules can be easily disassembled and replaced from the filter bottle, which greatly reduces maintenance costs. At the same time, the RO filter module, the pre- and post-filter modules and the filter bottle are tightly and reliably matched, which effectively ensures the sealing of each water passage inside the filter element.

[0024] The above-disclosed embodiments are merely examples of the present utility model. However, the present utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An integrated filter element with replaceable pre- and post-filter modules, characterized in that, include: A filter bottle, wherein an installation port is provided in the middle of the top wall of the filter bottle and a pure water outlet and a concentrated water outlet are provided in sequence from the middle to the outside of the bottom wall; a first partition ring and a second partition ring are provided on the upper surface of the bottom wall of the filter bottle corresponding to the pure water outlet and the concentrated water outlet, and a third partition ring is provided on the outer periphery of the concentrated water outlet; the first, second and third partition rings are arranged in a concentric circle structure. An RO filtration module, installed inside a filter bottle, includes an inner cylinder, an RO membrane disposed outside the inner cylinder, and an upper end cap and a lower end cap respectively fitted onto the upper and lower ends of the RO membrane. The lower end cap has an opening for the inner cylinder to pass through, and a downwardly extending first flange is provided on the outer periphery of the opening. The first flange is sealed and connected to the inner wall of a third partition ring, and the lower end of the inner cylinder is sealed and connected to the inner wall of a second partition ring, so that the first flange and the inner cylinder cooperate to form a concentrate outlet channel connected to the concentrate outlet. The pre- and post-filter modules are detachably installed in the inner cylinder through the filter bottle mounting port. They include a main housing, a pre-filter assembly, and a post-filter assembly. The main housing has a relatively closed cavity inside and is provided with a partition that divides the cavity into a pre-cavity and a post-cavity. The pre-filter assembly is a ring-shaped structure that filters water from the outside to the inside. It is installed in the pre-filter chamber and divides the pre-filter chamber into an external raw water chamber and an internal pre-filter chamber. The top of the main housing is provided with a pre-filter channel for connecting the filter bottle cavity and the pre-filter chamber. The top of the main housing is connected to a plug for sealing the filter bottle mounting port, and the plug is provided with at least one raw water inlet extending downward from its upper surface and penetrating the raw water chamber; The bottom wall of the rear chamber is provided with a first water passage hole in the middle. The rear filter assembly is a ring structure that filters water from the outside to the inside and is installed in the rear chamber outside the first water passage hole. The rear filter assembly divides the rear chamber into an external fine filtration chamber and an internal pure water chamber. At least one interconnected fine filtration water channel is constructed between the inner cylinder wall and the peripheral wall of the rear chamber. The lower surface of the bottom wall of the rear cavity is provided with a second flange corresponding to the outer periphery of the first water passage hole. The second flange is sealed and connected to the inner wall of the first partition ring to form a pure water outlet channel for pure water to flow out.

2. The integrated filter element with replaceable pre- and post-filter modules as described in claim 1, characterized in that, The main housing includes a connecting seat, an upper barrel connected to the upper part of the connecting seat to form a front cavity, and a lower barrel connected to the lower part of the connecting seat to form a rear cavity. The plug is integrally connected to the top wall of the upper barrel.

3. The integrated filter element with replaceable pre- and post-filter modules as described in claim 2, characterized in that, The upper barrel body has several upper slots spaced around its lower port on its circumferential wall, and the upper part of the connecting seat has several upper buckles that correspond one-to-one with the upper slots for fastening. And / or, the lower barrel body has a number of lower latches spaced around its upper port on its peripheral wall, and the lower part of the connecting seat has a number of lower buckles that correspond one-to-one with the lower latches.

4. The integrated filter element with replaceable pre- and post-filter modules as described in claim 2, characterized in that, The lower barrel wall and the inner barrel wall are arranged at intervals to form a transition cavity. The inner barrel is provided with a plurality of first connecting holes communicating with the transition cavity, and the lower barrel is provided with a plurality of second connecting holes communicating with the transition cavity.

5. The integrated filter element with replaceable pre- and post-filter modules according to claim 4, characterized in that, The inner wall of the inner cylinder is provided with a constricted section at the lower part of the connecting seat, and the constricted section is sealed and connected to the lower part of the connecting seat.

6. The integrated filter element with replaceable pre- and post-filter modules according to claim 1, characterized in that, The top wall of the upper barrel is provided with a second water passage hole that communicates with the primary water filtration chamber. The plug is provided with a transversely connected passage between the second water passage hole and the inner cavity of the filter bottle.

7. The integrated filter element with replaceable pre- and post-filter modules as described in claim 1, characterized in that, The plug and the filter bottle are connected by an interference fit, a rotary snap-fit, or a threaded fit.

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