CN209352650U

CN209352650U - Composite filter element component

Info

Publication number: CN209352650U
Application number: CN201821795364.3U
Authority: CN
Inventors: 李杨敏; 桂鹏; 莫祖栋
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2019-09-06
Anticipated expiration: 2028-10-31

Abstract

The utility model discloses a kind of composite filter element components, the composite filter element component includes: shell, first filtering group, with the second filtering group, the first accommodating chamber and the second accommodating chamber are limited in shell, it is spaced apart between first accommodating chamber and the second accommodating chamber by transition plates, transition plates was equipped with ferry, hydraulic pressure is higher than hydraulic pressure in the first accommodating chamber in second accommodating chamber, first filtering group is located in the first accommodating chamber, first filtering group is equipped with the first intubation being inserted into ferry, the first sealing ring is equipped between first intubation and the inner wall for crossing ferry, second filtering group is located in the second accommodating chamber, second filtering group is equipped with the second intubation being inserted into ferry, the second sealing ring is equipped between second intubation and the inner wall for crossing ferry, water is after the filtering of the second filtering group in second accommodating chamber, the first accommodating chamber is flowed to by ferry.According to the composite filter element component of the utility model embodiment, the piping connection between cavity is simple, has preferably sealing effect, high reliablity.

Description

Composite filter element assembly

Technical Field

The utility model relates to a water purification technology field especially relates to a compound filter element group spare.

Background

The tap water delivered to each user from a municipal water plant will typically contain a certain amount of salt ions, metallic substances, chlorides, microorganisms, silt, etc. In order to improve the drinking water quality, more and more families choose to install water purifiers on the water outlet pipe of tap water, and filter elements with multiple functions are arranged in the water purifiers so as to remove different types of harmful substances in water.

Generally, current purifier filter core is generally 3 ~ 4 grades, and some producer's purifier filter core is two cores. In order to improve the filter effect of compound filter element group spare, arrange multiple filter element group spare in the water purifier usually, advance between each filter element group spare, the delivery port is established ties in proper order, the filter core both sides of difference form the cavity of intaking respectively, go out the water cavity, in order to reach the drinking water of high-quality, often need establish ties threely, level four filter element group spare, all need outside pipeline to connect between delivery port and the water inlet between the different filter element group spares, it is numerous and diverse to make compound filter element group spare pipe-line system, water purifier complete machine occupation space is great, inconvenient installation and renew cartridge.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a composite filter element assembly, which can divide the housing into two cavities capable of accommodating different filtering materials by the design of the transition plate, and the pipeline connection is simple and has a better sealing effect.

The composite filter element assembly comprises a shell, a first filter group and a second filter group, wherein a first accommodating cavity and a second accommodating cavity are defined in the shell, the first accommodating cavity and the second accommodating cavity are separated by a transition plate, the transition plate is provided with a transition port, the water pressure in the second accommodating cavity is higher than that in the first accommodating cavity, the first filter group is arranged in the first accommodating cavity, the first filter group is provided with a first insertion pipe inserted into the transition port, a first sealing ring is arranged between the first insertion pipe and the inner wall of the transition port, the second filter group is arranged in the second accommodating cavity, the second filter group is provided with a second insertion pipe inserted into the transition port, a second sealing ring is arranged between the second insertion pipe and the inner wall of the transition port, and the water in the second accommodating cavity is filtered by the second filter group, flows to the first accommodating cavity through the transition port.

According to the utility model discloses compound filter element group spare is separated into the first chamber and the chamber that holds of second through the cab apron with the casing inner chamber, and its design can also satisfy different filtration to hydraulic requirement. Through first intubate, second intubate and transition mouth, can hold chamber UNICOM with first chamber and the second of holding, can prevent through first sealing washer and second sealing washer that first chamber and the second of holding from holding the chamber UNICOM time series flow, simple structure seals effectually, and the reliability is high.

In addition, according to the utility model discloses a compound filter element group spare can also have following additional technical characterstic:

in some embodiments of the present invention, one of the first cannula and the second cannula is inserted into the other, and the first sealing ring and the second sealing ring are radially arranged to form a double-layer seal.

The utility model discloses an in some embodiments, the cab apron is towards first one side that holds the chamber is encircleed the cab apron is equipped with first interior collar, the cab apron is being towards one side that the second holds the chamber is encircleed the cab apron is equipped with interior collar of second to the extension the axial length of cab apron.

Optionally, at least one of the first inner collar and the second inner collar is non-circular in outer profile.

Optionally, the transition plate is provided with a second outer convex ring surrounding the second inner convex ring on a side facing the second accommodating cavity, the second outer convex ring is spaced from the second inner convex ring in the radial direction, and the second inner convex ring and the second outer convex ring are both in contact with the end face of the second filter group to form a labyrinth seal.

In some embodiments of the present invention, at least one end of the transition port is provided with a chamfer of 30 to 60 degrees, so as to guide the first sealing ring and/or the second sealing ring into the transition port.

In some embodiments of the present invention, the housing comprises: the bottle comprises a bottle body and two bottle caps, wherein the two ends of the bottle body are open, the two bottle caps are respectively in sealing fit with the two ends of the bottle body, and the transition plate is connected to the bottle body.

Optionally, the two bottle caps are respectively connected to the bottle body in a spin welding manner or in a screw manner.

Optionally, the transition plate is integrally formed on the bottle body, or the transition plate is welded on the bottle body.

In some embodiments of the utility model, be equipped with first import and export, second import and export, third import and export on the casing, first filtration group includes that first filtration piece and second filter the piece, first filtration group includes the water route space bar, the water route space bar is established first holding the intracavity, the water route space bar will first holding the intracavity interval and go out first low-pressure area and second low-pressure area, first filtration piece is established in the first low-pressure area, by the water warp that first import and export flowed in follow behind the first filtration piece the second import and export and flow, the second is filtered and is established in the second low-pressure area, follow the water warp that crosses the ferry mouth inflow follow behind the second filtration piece the third import and export flows.

The utility model discloses an in some embodiments, be equipped with the fourth on the casing and import and export with the fifth, the second filter bank includes: a spiral wound reverse osmosis membrane element comprising: the reverse osmosis membrane water purifier comprises a central pipe group and a plurality of reverse osmosis membrane bags, wherein the central pipe group comprises a central pipe and a plurality of waste water pipes arranged at intervals, the plurality of waste water pipes are arranged around the central pipe, the pipe wall of the central pipe is provided with filtered water inlet holes, and the pipe wall of each waste water pipe is provided with a waste water inlet hole; said reverse osmosis membrane bags having a first portion located inside said central tube bank and a second portion located outside said central tube bank, each said waste and said central tube being separated by at least a first portion of said reverse osmosis membrane bags, said second portions of a plurality of said reverse osmosis membrane bags forming a multi-layer membrane module around the circumference of said central tube bank; the water entering the second accommodating cavity from the fourth inlet and outlet flows to the filtered water inlet hole after being filtered by the reverse osmosis membrane bag, the waste water pipe is connected with the fifth inlet and outlet, and the central pipe is connected with the transition port.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the internal structure of a composite filter element assembly according to an embodiment of the present invention;

FIG. 2 is a bottom view of a composite filter element assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a housing and a water stop assembly of the composite filter element assembly according to an embodiment of the present invention;

FIG. 4 is a schematic view of the internal structure of a composite filter element assembly of one embodiment of the present invention without the first and second filter groups;

FIG. 5 is a schematic cross-sectional view of a composite filter element assembly according to an embodiment of the present invention;

FIG. 6 is a schematic view of a composite filter element assembly bottle according to an embodiment of the present invention;

fig. 7 is a bottom view of a third end cap according to an embodiment of the present invention;

fig. 8 is a bottom view of a fourth end cap according to an embodiment of the present invention;

FIG. 9 is a schematic perspective view of a center tube and waste header according to an embodiment of the present invention;

FIG. 10 is a top view of a reverse osmosis membrane bag in combination with a center tube and a waste water header in accordance with an embodiment of the present invention;

FIG. 11 is a top view of a spiral wound reverse osmosis membrane element according to an embodiment of the present invention;

FIG. 12 is an enlarged view of the portion A in FIG. 1;

FIG. 13 is an enlarged view of the portion B in FIG. 5;

FIG. 14 is a schematic view of the lower end surface of a transition plate of a composite filter element assembly according to an embodiment of the present invention;

fig. 15 is a schematic view of the upper end surface of a transition plate of a composite filter element assembly according to an embodiment of the present invention.

Reference numerals:

a composite filter element assembly 1000;

a first accommodation chamber 100; a first filter bank 400; a first low-pressure region 1; a second low-pressure region 2;

a first filter member 10; a first uniform distribution flow channel 11; a second uniform distribution flow channel 12;

a first port 101; a second port 102;

a second filter member 20; a third uniform distribution flow channel 21; a fourth equispaced flow passage 22;

a third inlet and outlet port 201;

a first inner end cap 41;

a first outer end cap 42; a first cannula 421;

a second inner end cap 43; an inner port 431; a fifth cannula 432;

a second outer end cap 44; an outer port 441; a sixth cannula 442;

a second middle end cap 45; a middle port 451; a seventh cannula 452;

a waterway partition plate 46; a spacer bracket 49;

the second receiving chamber 200; a second filter bank 500; a spiral wound reverse osmosis membrane element 3; a center tube group 13;

fifth evenly distributed runners 31; a reverse osmosis membrane bag 32; a center tube 33; a waste water header 34;

a fifth port 301; a fourth port 302;

a third end cap 47; a second cannula 471; a third cannula 472; the fool-proof projection 473;

a fourth end cap 48; a fourth cannula 481; a waste outlet 482;

a water stop assembly 50; a water stop structure recessed platform 51; a spring 52; a seal ring 53; a water stop structure 54; a restraint stage 541;

a housing 300;

a first cap 310; a first adapter 311; a second adapter 312; a third adapter 313;

a second bottle cap 320; the fourth adapter 321;

a vial 330; a transition plate 331; a transition port 332; a first inner collar 333; a second inner collar 334; a first seal ring 335; a second seal ring 336; a second outwardly convex ring 337.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A composite filter element assembly 1000 according to an embodiment of the present invention is described below with reference to fig. 1-15.

A composite filter element assembly 1000 according to embodiments of the present invention, as shown in fig. 1, 3, 5 and 12, includes a housing 300, a first filter bank 400 and a second filter bank 500.

The housing 300 defines a first accommodating chamber 100 and a second accommodating chamber 200 therein, the first accommodating chamber 100 and the second accommodating chamber 200 are spaced apart by a transition plate 331, and the transition plate 331 is provided with a transition port 332. Here, the transition plate 331 causes the first receiving chamber 100 and the second receiving chamber 200 to form two generally spaced chambers within the housing 300, which communicate with each other only through the transition port 332.

The water pressure in the second accommodating chamber 200 is higher than that in the first accommodating chamber 100, and the design of the second accommodating chamber can meet the requirements of different filter structures on the water pressure. For example, the filtering flow resistance in the first accommodating chamber 100 is small, so that the first accommodating chamber 100 is designed to be a low-pressure chamber, the water purification system does not need to configure a booster pump for the first accommodating chamber 100, the pressure bearing of the internal parts and corresponding joints of the first accommodating chamber 100 is small, and the requirement on the reliability of part assembly and sealing is low. And the filtration circulation resistance in the second accommodating cavity 200 is large, at this time, a booster pump can be separately configured for the second accommodating cavity 200, and the pressure bearing capacity of the internal parts of the second accommodating cavity 200 and the corresponding connecting pipes is ensured. The separated arrangement is beneficial to reducing the cost.

Specifically, the first filtering set 400 is disposed in the first accommodating chamber 100, the second filtering set 500 is disposed in the second accommodating chamber 200, the first filtering set 400 can perform filtering function in the low pressure chamber with relatively low water pressure, and the second filtering set 500 can perform filtering function in the high pressure chamber with relatively high water pressure. Here, the water in the first accommodating chamber 100 may flow to the second accommodating chamber 200 through the transition port 332 after being purified, or the water in the second accommodating chamber 200 may flow to the first accommodating chamber 100 through the transition port 332 after being purified, which is not limited herein.

The first filter group 400 is provided with a first insertion tube 421 inserted into the transition port 332, and a first sealing ring 335 is arranged between the first insertion tube 421 and the inner wall of the transition port 332. The second filter group 500 is provided with a second insertion tube 471 inserted into the transition port 332, and a second sealing ring 336 is arranged between the second insertion tube 471 and the inner wall of the transition port 332. After being filtered by the second filter set 500, the water in the second accommodating chamber 200 flows to the first accommodating chamber 100 through the transition port 332. The water is purified and filtered by the second filtering group 500 and the first filtering group 400, and the purifying and filtering effect is good.

In addition, the first sealing ring 335 can seal the gap between the first insertion tube 421 and the transition port 332, and the second sealing ring 336 can seal the gap between the second insertion tube 471 and the transition port 332, so as to prevent water from leaking from the gap, so that the purified water and the unpurified water are not in series flow, and the filtering effect of the purified water is ensured.

According to the utility model discloses compound filter element group spare 1000 separates into the first chamber 100 and the second chamber 200 that holds through cab apron 331 with the casing 300 inner chamber, and its design can also satisfy different filtration to hydraulic requirement. Through first intubate 421, second intubate 471 and transition mouth 332, can hold chamber 100 and second and hold the chamber 200 UNICOM, can prevent through first sealing washer 335 and second sealing washer 336 that first chamber 100 and the second of holding from holding and holding the chamber 200 UNICOM's series flow, simple structure closes effectually, and the reliability is high.

In some embodiments of the present invention, as shown in fig. 3, 5, 14 and 15, the housing 300 includes a bottle body 330 with two open ends and two bottle caps respectively sealed and fitted at two ends of the bottle body 330, and the transition plate 331 is connected to the bottle body 330. Here, two caps may be detachably coupled to the bottle body 330 to facilitate the installation of the first filter group 400 and the second filter group 500 into the bottle body 330. Of course, two bottle caps may be non-detachably connected to the bottle body 330. Alternatively, the two caps are respectively spin-welded or screw-connected to the body 330.

Alternatively, the transition plate 331 is integrally formed on the bottle body 330, or the transition plate 331 is welded to the bottle body 330. For example, when the bottle body 330 is a plastic part, the transition plate 331 and the bottle body 330 are integrally injection molded, the integral molding is convenient for processing and manufacturing, and the sealing connection between the transition plate 331 and the bottle body 330 is very reliable, so as to prevent the transition plate 331 from deflecting and leaking water in the bottle body 330 when the bottle body 330 is impacted by force or the pressure difference between the two sides is too large. When the transition plate 331 can be welded to the bottle body 330, the bottle body 330 and the transition plate 331 can be manufactured separately, thereby reducing the processing difficulty and saving the production cost. No matter the integral injection molding or welding connection is adopted, the pressure difference between the first accommodating cavity 100 and the second accommodating cavity 200 can be well borne, and the phenomenon that high-pressure water in the second accommodating cavity 200 permeates into the first accommodating cavity 100 without passing through the transition opening 332 is avoided. Of course, the transition plate 331 and the bottle body 330 can be connected in other ways, and are not limited herein.

In some embodiments of the present invention, as shown in fig. 1 and 12, one of the first cannula 421 and the second cannula 471 is inserted into the other, and the first sealing ring 335 and the second sealing ring 336 are radially arranged to form a double-layer seal. When the first cannula 421 is inserted into the second cannula 471, the first sealing ring 335 is disposed between the first cannula 421 and the second cannula 471. When the second cannula 471 is inserted into the first cannula 421, the second sealing ring 336 is disposed between the first cannula 421 and the second cannula 471.

In some embodiments of the present invention, as shown in fig. 1, 5 and 12, 14 and 15, the transition plate 331 is provided with a first inner collar 333 around the transition opening 332 at a side facing the first accommodating chamber 100, and the transition plate 331 is provided with a second inner collar 334 around the transition opening 332 at a side facing the second accommodating chamber 200 to extend the axial length of the transition opening 332. The fitting surfaces of the first and second insertion tubes 421 and 471 are axially large, providing greater bending resistance and contact strength. Meanwhile, the first insertion tube 421 and the second insertion tube 471 are sealed by the first sealing ring 335 and the second sealing ring 336 at the transition port 332, so that the installation operation is convenient, and the sealing performance is good. In addition, as shown in fig. 12, the first inner collar 333 and the second inner collar 334 may block water pressure in a radial direction, thereby reducing the pressure of the water sealed by the first sealing ring 335 and the second sealing ring 336, and further enhancing the sealing effect.

In some particular embodiments, at least one of the first inner collar 333 and the second inner collar 334 has an outer contour that is non-circular. Thus, when the bottle body 330 needs to be fixed, the bottle body can be fixed and prevented from rotating by the first inner collar 333 or the second inner collar 334 which are not circular. First filter stack 400 and second filter stack 500 may be installed in housing 300 without being sequenced.

For example, in the example of fig. 3 and 15, the first inner collar 333 on the transition plate 331 has a hexagonal outer profile. When the second filter group 500 is to be installed in the second receiving chamber 200, the bottle body 330 is first turned upside down to make the opening of the second receiving chamber 200 upward, and then the bottle body 330 is fixed by a fixing tool, for example, and the second filter group 500 is installed from above. When the second cap 320 is fixed to the body 330 after the assembly, the second cap 320 is usually screwed down to tightly cover the body 330. To ensure that the bottle body 330 is completely fixed, it is preferable that the fixing tool is inserted into the bottle body 330 by using the first inner collar 333. Because the first inner collar 333 is non-circular in profile, the fixture is provided with non-circular fixing holes so that the bottle body 330 does not rotate.

Optionally, the transition plate 331 is provided with a second outer convex ring 337 surrounding the second inner convex ring 334 on a side facing the second accommodating chamber 200, the second outer convex ring 337 is spaced apart from the second inner convex ring 334 in a radial direction, and the second inner convex ring 334 and the second outer convex ring 337 are both in contact with an end surface of the second filter group 500 to form a labyrinth seal. The first inner collar 333 and the second inner collar 334 are abutted against the end face of the second filter group 500, and can block water in the radial direction from flowing to the transition port 332, so that the water undergoes double blocking, and the sealing performance is improved.

In some embodiments of the present invention, as shown in fig. 1, 5 and 13, at least one end of the transition port 332 is provided with a chamfer of 30 degrees to 60 degrees, i.e. one end or both ends of the transition port 332 form a chamfer, which can facilitate at least one of the first sealing ring 335 and the second sealing ring 336 to be guided into the transition port 332. The chamfer can remove burrs generated during processing, and the chamfer can increase the opening size of the transition opening 332, so that the insertion of the pipe is facilitated. In addition, when the first filter group 400 is inserted into the transition opening 332 through the first insertion tube 421 or the second filter group 500 is inserted into the transition opening 332 through the second insertion tube 471, the chamfer design has a guiding function, so that the filter group can be screwed towards the direction coaxial with the transition opening 332, and the possibility of skewing in the assembling process is reduced.

In some embodiments, as shown in fig. 1, 2 and 4, the housing 300 is provided with a first inlet/outlet 101, a second inlet/outlet 102 and a third inlet/outlet 201, the first filter group 400 includes a first filter element 10, a second filter element 20 and a water path partition plate 46, the water path partition plate 46 is disposed in the first accommodating chamber 100, the water path partition plate 46 partitions the first accommodating chamber 100 into a first low pressure region 1 and a second low pressure region 2, the first filter element 10 is disposed in the first low pressure region 1, water flowing from the first inlet/outlet 101 flows out from the second inlet/outlet 102 through the first filter element 10, and the second filter element 20 is disposed in the second low pressure region 2, and water flowing from the transition port 332 flows out from the third inlet/outlet 201 through the second filter element 20. The first filter member 10 and the second filter member 20 are partitioned in the first receiving chamber 100 to form two independent purification water paths. The waterway partition plate 46 divides the first receiving chamber 100 into a first low pressure region 1 and a second low pressure region 2, the first low pressure region 1 is communicated with the first port 101 and the second port 102, and the second low pressure region 2 is communicated with the transition port 332 and the third port 201.

Optionally, other filter elements can be connected between the two groups of filter elements; or the water inlet of the first filter element 10 can be directly connected with the water outlet of the second filter element 20, or the water outlet of the first filter element 10 can be directly connected with the water inlet of the second filter element 20, so that the purifying water path between the first filter element 10 and the second filter element 20 is connected in series.

Alternatively, as shown in fig. 1, a first uniform flow passage 11 is defined between the first filter member 10 and the inner wall of the first accommodating chamber 100, and the first uniform flow passage 11 is connected to the first inlet/outlet 101. A second uniform flow channel 12 is defined between the water path partition plate 46 and the first filtering piece 10, and the second uniform flow channel 12 is connected with the second inlet/outlet 102.

A third uniform flow channel 21 is defined between the water channel partition plate 46 and the second filtering piece 20, a fourth uniform flow channel 22 is arranged on one side of the second filtering piece 20 far away from the third uniform flow channel 21, one of the third uniform flow channel 21 and the fourth uniform flow channel 22 is connected with the third inlet/outlet port 201, and the other one of the third uniform flow channel 21 and the fourth uniform flow channel 22 is connected with the transition port 332. Here, when the third equispaced flow channels 21 are connected to the transition port 332, the fourth equispaced flow channels 22 are connected to the third inlet and outlet ports 201; when the third equispaced flow channels 21 are connected to the third inlet and outlet ports 201, the fourth equispaced flow channels 22 are connected to the transition port 332.

Alternatively, as shown in fig. 1 and fig. 3, the first accommodating cavity 100 and the second accommodating cavity 200 are arranged at an axial interval, one of the uniformly distributed flow paths on both sides of the second filter element 20 is communicated with the second accommodating cavity 200 through the transition port 332 on the transition plate 331, and the two accommodating cavities (100, 200) are compactly matched, so that an external connecting pipeline required to be laid when water filtered by the first filter group flows to the second filter element 20 for filtering is saved; it is also possible to save the external connecting pipes that the water filtered by the second filter element 20 needs to be routed to the second filter group 500 for filtration. Facilitating a reduction in the overall size of the composite filter element assembly 1000. It is advantageous to simplify the arrangement of the external piping.

From the layout positions of the first uniform flow channel 11, the second uniform flow channel 12, the third uniform flow channel 21 and the fourth uniform flow channel 22, when the water flow passes through the first filter element 10 and the second filter element 20, most of the water flow passes through the first accommodating cavity 100 along the radial direction, the passing path is short, and the flow volume is large. And the impurities on the surface of the filter piece are washed when the water flows through the filter piece in the radial direction, and the water flows through the filter piece after the impurities are more easily washed away. Most of water flow of each filter element flows along the axial direction basically when water enters and exits, so that the uniform distribution of the water flow is facilitated, and the impurities washed away are brought to the axial end part, so that the impurities are prevented from being blocked on the surface of the filter element.

Compare two sets of filter pieces of integration in a filter element group spare among the prior art, the utility model discloses an integrated level is higher, and the function is stronger. When the filter element is replaced, only the different ends of the shell 300 need to be detached, and the sealing ends corresponding to the filtering pieces are required to be detached, so that the corresponding filtering pieces can be replaced, the replacement is simple, the operation is easy, the possibility of replacing the filtering pieces by customers is provided, and the maintenance cost is reduced.

Even if can not tear out after holding intracavity filter piece installation, nevertheless because all filter all set up in casing 300, only need one set of location, mounting structure when compound filter element group spare 1000 integral erection, the assembly is simple, save time.

In some examples of the present invention, as shown in fig. 1, 5, and 7, the water path partition plate 46 is cylindrical, the second filter element 20 is located inside the water path partition plate 46, the first filter element 10 is located outside the water path partition plate 46, optionally, the first filter element 10 and the second filter element 20 are also cylindrical, the first filter element 10, the water path partition plate 46, and the second filter element 20 are sequentially sleeved, and the central cavity of the second filter element 20 is the fourth uniform flow channel 22. Here, the fourth equispaced flow channels 22 are in the center of the first filter unit, which is cylindrical. The outer side of the fourth uniform flow channel 22 is respectively compactly provided with a layer of second filtering piece 20, a layer of third uniform flow channel 21, a layer of water channel partition plate 46, a layer of second uniform flow channel 12, a layer of first passing piece and a layer of first uniform flow channel 11 in the radial direction, and the third uniform flow channel 21 and the second uniform flow channel 12 are isolated from each other through the water channel partition plate 46 and do not circulate. The first accommodating chamber 100 is compact in overall arrangement, occupies a small installation space, and has high integration level. The first filter member 10 and the second filter member 20 are conveniently installed.

The first filter group 400 comprises a first outer end cover 42, the first outer end cover 42 is connected with one end periphery of the water path partition plate 46 in a sealing manner, a first insertion pipe 421 communicated with the second low-pressure region 2 is arranged on the first outer end cover 42, the first insertion pipe 421 is connected with the transition plate 331, and a first sealing element is arranged between the first insertion pipe 421 and the transition plate 331 so as to prevent the high-pressure cavity from streaming with the first low-pressure region 1.

The first outer end cap 42 closes the bottom of the first filter element 10 and the second uniform flow channel 12, and provides support for the first filter element 10 to prevent the liquid from flowing in series at the bottom. The water path partition plate 46 is connected to the first outer end cover 42, which is beneficial to the first outer end cover 42 to be firmly arranged at a specific position, so that the second uniform flow passage 12 and the third uniform flow passage 21 are reliably separated. The first cannula 421 communicates with the second depression 2 and water in the depression can enter the second depression 2 through the first cannula 421. Optionally, the water path partition plate 46 and the first outer end cover 42 are integrally formed, so as to facilitate processing and manufacturing.

Optionally, as shown in fig. 1, the first filter group 400 includes a second middle end cap 45, the second middle end cap 45 is connected with the other end periphery of the waterway partition plate 46 in a sealing manner, a seventh insertion tube 452 is arranged on the second middle end cap 45, and the seventh insertion tube 452 is connected with the housing 300 in a sealing manner.

In some embodiments of the present invention, as shown in fig. 1 and fig. 2, a fourth port 302 and a fifth port 301 are disposed on the housing 300, and the second filtering set 500 includes: spiral wound reverse osmosis membrane element 3, spiral wound reverse osmosis membrane element 3 comprising: the central pipe group 13 and a plurality of reverse osmosis membrane bags 32, the reverse osmosis membrane bags 32 can separate the water to be purified and filtered, so that pure water and waste water are formed after water purification and filtration. The central tube group 13 comprises a central tube 33 and a plurality of waste water headers 34 arranged at intervals, the plurality of waste water headers 34 are arranged around the central tube 33, filter water inlet holes are arranged on the tube wall of the central tube 33, waste water inlet holes are arranged on the tube wall of the waste water headers 34, the reverse osmosis membrane bags 32 are provided with a first part positioned inside the central tube group 13 and a second part positioned outside the central tube group 13, each waste water header 34 and the central tube 33 are separated by the first part of at least one reverse osmosis membrane bag 32, and the second parts of the plurality of reverse osmosis membrane bags 32 form a multi-layer membrane module around the central tube group 13; wherein, the water entering the high pressure chamber from the fourth inlet/outlet 302 is filtered by the reverse osmosis membrane bag 32 and flows to the filtered water inlet hole, the waste water header 34 is connected with the fifth inlet/outlet 301, and the central pipe 33 is connected with the transition port 332.

In some embodiments of the present invention, as shown in fig. 1, the reverse osmosis membrane bag 32 is rolled into a cylindrical shape, a fifth uniform flow channel 31 is defined between the reverse osmosis membrane bag 32 and the inner wall of the second accommodating chamber 200, and the center of the reverse osmosis membrane bag 32 is disposed just opposite to the transition port 332. From the layout of the spiral wound reverse osmosis membrane element 3 and the fifth uniform flow channel 31, most of the water flow passes through the spiral wound reverse osmosis membrane element 3 along the radial direction of the spiral wound reverse osmosis membrane element 3, and the passing path is short and the flow rate is large. And the impurities on the surface of the filter piece are washed when the water flows through the filter piece in the radial direction, and the water flows through the filter piece after the impurities are more easily washed away. Most of water flow of the filtering piece flows along the axial direction basically when water enters the filtering piece, so that the uniform distribution of the water flow is facilitated, and the impurities washed away are brought to one end of the axial direction, so that the impurities are prevented from being blocked on the surface of the filtering piece.

The water flowing into the fifth uniform flow passage 31 continuously permeates into the reverse osmosis membrane bag 32 while flowing in a direction radially through the reverse osmosis membrane bag 32 and toward the central tube 33. The purified water permeated into the reverse osmosis membrane bag 32 partially continues to flow toward the central tube 33 in the radial direction and partially flows toward the central tube 33 in a spiral direction by being influenced by the extending direction of the membrane. Eventually purified water enters the center tube 33 from the filtered water access hole and then flows toward the transition 332. The water that does not permeate into the reverse osmosis membrane bag 32 is collected at the waste water collecting pipe 34, the remaining waste water flows to the waste water collecting hole on the pipe wall of the waste water collecting pipe 34, and the waste water collecting pipe 34 is connected with the fifth inlet and outlet 301, and the waste water is discharged from the fifth inlet and outlet 301. When water passes through the reverse osmosis membrane bag 32, the water passes through the reverse osmosis membrane bag 32 along the radial direction, the passing path is short, the circulation is large, the impurities on the surface of the reverse osmosis membrane bag 32 are scoured, and the water flow can more easily scour the impurities and then passes through the reverse osmosis membrane bag 32.

In some embodiments of the present invention, as shown in fig. 1, second filter group 500 further comprises: and the third end cover 47 and the fourth end cover 48, the third end cover 47 and the fourth end cover 48 are respectively connected to the two axial ends of the spiral wound reverse osmosis membrane element 3, the third end cover 47 is connected with the transition plate 331, the central pipe 33 is connected with the transition port 332 through the third end cover 47, and the waste water header 34 is connected with the fifth inlet/outlet 301 through the fourth end cover 48. As shown in fig. 1, the third end cap 47 has a second insertion tube 471 and a third insertion tube 472 communicating with each other, and the third insertion tube 472 is connected to the central tube 33. Here, the third end cap 47 closes the top of the spiral wound reverse osmosis membrane element 3 and provides a top support connection for the spiral wound reverse osmosis membrane element 3, effectively preventing liquid from crossing at the top. The fourth end cap 48 closes the bottom of the spiral wound reverse osmosis membrane element 3 and provides sealing and support of the bottom, effectively preventing liquid cross-over at the bottom. The waste header 34 communicates between the waste 482 and the fifth inlet/outlet 301 to allow the high salinity waste water to flow out of the housing 300 sufficiently quickly.

The third end cap 47 is inserted into the central tube 33 through the third insertion tube 472, so that on one hand, the sealing is realized by using the surface contact between the third insertion tube 472 and the tube wall of the central tube 33, on the other hand, the positioning and the installation of the central tube 33 are facilitated, and the central tube 33 is prevented from being inclined and leaking water after long-term use.

In addition, as shown in fig. 1 and 8, the third end cap 47 is provided with a fool-proof protrusion 473, the fool-proof protrusion 473 is arranged corresponding to the waste water header 34, one end of the waste water header 34 is inserted into the fool-proof protrusion 473, so that the third end cap 47 and the waste water header 34 can be conveniently positioned and installed, and the waste water header 34 can be prevented from being inclined after long-term use.

Alternatively, both axial ends of the rolled-out circular tube of the reverse osmosis membrane bag 32 are glued to the third and fourth end caps 47 and 48. Therefore, the assembly is convenient, the integral core is convenient to install, and the end part is convenient to seal.

Optionally, the utility model discloses a reverse osmosis membrane bag 32 is reverse osmosis membrane element (RO membrane element), and reverse osmosis membrane element adopts the side stream water conservation membrane, through the side inflow, improves the membrane surface velocity of flow, guarantees higher pure water rate of recovery to and the longer life of membrane bag.

Alternatively, the reverse osmosis membrane bag 32 may be an ultrafiltration membrane module, and specifically, an existing ultrafiltration membrane cartridge on the market may be selected. The principles and techniques of ultrafiltration and reverse osmosis are well known to those skilled in the art and will not be described in detail in the present application. In addition, when the reverse osmosis membrane bag 32 adopts the above-mentioned filter member, the liquid needs to be pressurized in advance and then pumped into the fourth inlet/outlet 302.

The features of the invention defined as "first", "second", "third", "fourth" and "fifth" may explicitly or implicitly include one or more of the features for distinctively describing the features, whether sequential or light in weight.

In some embodiments of the present invention, as shown in fig. 1, the composite filter element assembly 1000 further comprises: a first inner end cap 41, the first inner end cap 41 is fitted on the axial end face of the second filter member 20 facing the transition port 332 to block the second filter member 20 and the fourth uniform flow channels 22. The first inner end cap 41 is used to block the second filter element 20 and the fourth uniform flow channel 22, which means that the first inner end cap 41 seals the axial end surface of the second filter element 20 and the fourth uniform flow channel 22, so that the water in the second filter element 20 and the fourth uniform flow channel 22 cannot flow out or in from the axial end surface facing the transition port 332. When a certain end cover mentioned below blocks a certain filter element and a certain uniformly distributed flow passage, the meanings are the same, and the description is omitted.

In fig. 1, the first inner end cap 41 closes the bottom of the second filter element 20 and the fourth uniform flow channel 22, and provides a bottom support for the second filter element 20, so as to effectively prevent the liquid to be purified on both sides of the second filter element 20 and the purified liquid from being mixed at the bottom, thereby ensuring the filtering effect of the second filter element 20.

Optionally, the first inner end cap 41 is provided with an inner flange extending into the fourth uniform flow channel 22, and the outer peripheral surface of the inner flange contacts with the inner peripheral surface of the second filter element 20. Alternatively, the outer periphery of the first inner end cap 41 is provided with a burring, the inner side face of which is in contact with the outer peripheral face of the second filter member 20. The inner flange and the outer flange are arranged in the same way, so that the liquid blocking effect of the first inner end cover 41 on the end surfaces of the fourth uniformly distributed flow passage 22 and the second filter piece 20 can be enhanced; and a foolproof fit of the first inner end cap 41 and the second filter member 20 can be formed, with easy assembly.

Specifically, the end face of the shaft end of the second filter member 20 is glued to the first inner end cap 41, which not only facilitates assembly, but also facilitates installation of the integrated core. Optionally, the second filter element 20 is sealingly attached to the first inner end cap 41 by a bead of hot melt adhesive.

Alternatively, as shown in fig. 1, the first outer end cover 42 protrudes upward in the middle to form a boss, and the first inner end cover 41 is suspended above the boss. That is, a certain gap is formed between the first inner end cap 41 and the boss, so that the third uniform flow channel 21 is communicated with the transition port 332, and the purification water channel between the second filter element 20 and the spiral wound reverse osmosis membrane element 3 is connected in series. That is, the water filtered by the second filter member 20 may flow to the spiral wound reverse osmosis membrane element 3 through the aqueduct 332, and be filtered again by the spiral wound reverse osmosis membrane element 3; alternatively, the water filtered by the spiral wound reverse osmosis membrane element 3 may flow to the second filter member 20 through the transition port 332 and be filtered again by the second filter member 20.

Alternatively, the outer periphery of the first outer end cap 42 is provided with a burring, the inner side face of which is in contact with the outer peripheral face of the first filter member 10. The outer flanging is sleeved outside the middle boss of the first outer end cover 42, and the outer flanging blocks two sides of the middle boss, so that the liquid blocking effect of the first outer end cover 42 on the end face of the first filter piece 10 can be enhanced; and a foolproof fit for the first filter 10 can be formed, with easy assembly.

Specifically, the end face of the first filter member 10 at the axial end is glued to the first outer end cap 42, which facilitates not only assembly but also installation of the integrated core. Optionally, the first filter element 10 is sealingly attached to the first outer end cap 42 by a ring of hot melt adhesive.

Specifically, first insertion tube 421 is coaxially disposed with first inner end cap 41, and the inner diameter of first insertion tube 421 is smaller than the outer diameter of first inner end cap 41, so that first inner end cap 41 and second filter element 20 are blocked in first outer end cap 42.

Alternatively, the gap between the first inner end cap 41 and the first outer end cap 42 is smaller, the first inner end cap 41 contacts with the first outer end cap 42 when the first inner end cap is acted by a force towards the first outer end cap 42, and when the transition port 332 is pushed open by the inflow water, the gap is enlarged, and the water path circulation is more smooth. The design of the first inner end cap 41 as a suspension at a small distance from the first outer end cap 42 allows for a delicate balancing of the water pressure as it passes through the second filter element 20. That is, when the water pressure in the fourth equispaced flow passages 22 is higher than the water pressure at the transition port 332, the first inner end cap 41 can temporarily seal the transition port 332.

In some embodiments of the present invention, as shown in fig. 1, the composite filter element assembly 1000 further comprises: a second inner end cap 43 and a second outer end cap 44. Wherein, the second inner end cap 43 is fitted on the axial end face of the second filter member 20 far from the transition port 332 to block the second filter member 20, and the second inner end cap 43 is provided with an inner port 431 communicated with the third inlet and outlet port 201. Here, the second inner end cap 43 closes the top of the second filter element 20 and provides a top connection for the second filter element 20 and a direction for the third inlet/outlet 201, which effectively prevents the liquid to be purified on both sides of the second filter element 20 and the purified liquid from crossing at the top, further ensuring the filtering effect of the second filter element 20. The fluid filtered by the second filter group 500 is collected in the fourth uniform flow channel 22 and discharged to the outside through the inner port 431.

Alternatively, the periphery of the second inner end cap 43 is provided with a downward flange whose inner side surface is in contact with the outer peripheral surface of the second filter member 20. The second inner end cap 43 is provided with an inner flange extending into the fourth equispaced flow channels 22, and the outer peripheral surface of the inner flange contacts the inner peripheral surface of the second filter member 20. The inner flange and the outer flange are each arranged the same, so that the connection between the second inner end cap 43 and the second filter element 20 is tighter, and the reliability of the connection is increased. And the liquid blocking effect of the second inner end cap 43 on the end face of the second filter member 20 can be enhanced, and the fool-proof fit of the second inner end cap 43 can be formed, so that the assembly is easy.

The second outer end cap 44 is fitted over the axial end face of the first filter element 10 remote from the transition port 332 to block the first filter element 10, and the second outer end cap 44 is provided with an outer port 441 which is externally fitted over the inner port 431. Correspondingly, the second outer end cap 44 closes the tops of the first filter element 10 and the second uniform flow passage 12, and provides a connection for the first filter element 10, so as to separate the first inlet/outlet 101 and the second inlet/outlet 102, thereby effectively preventing the liquid to be purified and the liquid after purification on the two sides of the first filter element 10 from being mixed at the top, and further ensuring the filtering effect of the first filter element 10.

Alternatively, the periphery of the second outer end cap 44 is provided with a downward flange, and the inner side face of the flange is in contact with the outer peripheral face of the first filter member 10. The arrangement of the flanging makes the connection between the second outer end cover 44 and the first filter element 10 tighter, and increases the reliability of the connection. And the liquid blocking effect of the second outer end cover 44 on the end face of the first filter piece 10 can be enhanced, and the fool-proof fit of the first filter piece 10 can be formed, so that the assembly is easy.

Specifically, the axial end face of the first filter element 10 is glued to the second outer end cap 44, which not only facilitates assembly, but also facilitates installation of the integrated core. Optionally, the first filter element 10 is sealingly attached to the second outer end cap 44 by a ring of hot melt adhesive.

In some examples, as shown in fig. 1, the inner peripheral wall of the housing 300 is provided with a first connection pipe 311 and a second connection pipe 312, the inner port 431 of the second inner end cover 43 is connected with the first connection pipe 311 in a plugging manner, and the outer port 441 of the second outer end cover 44 is connected with the second connection pipe 312 in a plugging manner. This manner of assembling the plug connection makes it very easy to fix the first and second filter cartridges in the housing 300.

In this way, the position of the first filter element 10 is substantially fixed and the assembly step is a two-end plug-in process, which makes it possible to assemble it very simply and in a time-saving manner. And both ends of the first filter member 10 are not removed as long as the housing 300 is not deformed, whereby it can be seen that the first filter member 10 is assembled with high reliability.

One end of the second filter member 20 is inserted into the first connecting pipe 311 through the second inner end cap 43, the other end of the second filter member 20 is sealed by the first inner end cap 41, and the interval between the first inner end cap 41 and the first outer end cap 42 is very small, which is equivalent to that the other end of the second filter member 20 is supported by the first outer end cap 42. In this way, the position of the second filter element 20 is also substantially fixed and the assembly step is carried out with only one end plugged, which makes it possible to assemble it very simply and in a time-saving manner. And both ends of the second filter member 20 are not removed as long as the housing 300 is not deformed, whereby it is seen that the assembling reliability of the second filter member 20 is high.

In the example of fig. 1 and 4, a fifth cannula 432 is formed on the second inner end cap 43, and a nozzle of the fifth cannula 432 forms the above-described inner port 431. The fifth cannula 432 may be inserted inside the first adapter 311, and the fifth cannula 432 may also be inserted outside the first adapter 311. In order to improve the sealing effect, a sealing ring 53 is disposed between the fifth insertion tube 432 and the first connection tube 311.

In the example shown in fig. 1 and 4, the second outer end cap 44 has a sixth cannula 442 formed thereon, the orifice of the sixth cannula 442 forming the outer port 441. The sixth cannula 442 may be inserted within the second adapter 312 and the sixth cannula 442 may also be inserted outside the second adapter 312. In order to improve the sealing effect, a sealing ring 53 is disposed between the sixth insertion tube 442 and the second connection tube 312.

In some examples, as shown in fig. 1 and 4, a third connection pipe 313 is provided on an inner circumferential wall of the housing 300, and the middle port 451 of the second middle end cap 45 is connected to the third connection pipe 313 in a plugging manner.

In the embodiment of the present invention, the second middle end cover 45 may not be provided, so that the water path partition plate 46 may be directly connected to the third connection pipe 313, thereby saving the number of parts. However, since the second filter element 20 is assembled to the inner side of the waterway partition plate 46, the waterway partition plate 46 cannot be installed if the opening is small, and the assembly of the second outer end cap 44 and the first filter element 10 is affected if the opening of the waterway partition plate 46 is large, which increases the difficulty of the whole assembly.

Therefore, the second middle end cover 45 is provided, parts such as the second filter piece 20 and the like are firstly installed in the water channel partition plate 46 during assembly, and then the second middle end cover 45 is connected to the water channel partition plate 46, so that the assembly requirement is met, and the reliability of the overall assembly is improved. On the other hand, when the water path partition plate 46 is integrally formed with the first outer end cap 42, the water path partition plate can be manufactured by an integral injection molding method, and at this time, the second middle end cap 45 should not be integrally injection molded for convenience of mold opening.

The third connecting pipe 313 is arranged on the shell 300, the third connecting pipe 313 is connected with the middle port 451 in an inserting mode, the step of fixing the end portion of the water path partition plate 46 only comprises the inserting process, and the water path partition plate is very simple and time-saving in assembly and high in reliability. In the example of fig. 1, a seventh cannula 452 is formed on the second middle end cap 45, and a nozzle of the seventh cannula 452 forms the middle port 451. The seventh cannula 452 may be inserted inside the third adapter 313 and the seventh cannula 452 may also be inserted outside the third adapter 313. In order to improve the sealing effect, a sealing ring 53 is arranged between the seventh insertion tube 452 and the third connection tube 313, and a sealing ring 53 is also arranged between the second middle end cover 45 and the waterway partition plate 46.

In the example of fig. 1, the small distance between the second center end cap 45 and the second outer end cap 44 allows for a delicate balancing of the water pressure as it passes through the first filter element 10. That is, when the water pressure inside the waterway partition 46 is higher than the water pressure outside, the second middle cap 45 may be pressed against the second outer cap 44, and the filtering speed of the first filter member 10 is slowed down. During normal operation, the water pushes the second middle end cover 45 open and flows normally toward the second inlet/outlet 102.

In some embodiments, all of the components of the first receiving cavity 100 are pre-assembled into a single piece, that is, the first filter element 10, the second filter element 20, the first inner end cap 41, the first outer end cap 42, the second inner end cap 43, the second outer end cap 44, and the second middle end cap 45 are pre-connected into a front-rear integrated filter cartridge. Even the sealing rings 53 of the first adapter 311, the second adapter 312 and the third adapter 313 may be pre-assembled to the fifth cannula 432, the sixth cannula 442 and the seventh cannula 452.

The front and rear integrated filter element can be directly inserted between the transition plate 331 and the first bottle cap 310 during assembly, and the assembly process of the whole machine is greatly simplified. Moreover, if the first bottle cap 310 is detachably connected to the bottle body 330, the user can replace the front and rear integrated filter element by himself or herself after using the first bottle cap, and the operation steps of the user during replacement are very easy, so that the core replacement experience and the core replacement cost of the user are improved.

Alternatively, as shown in fig. 1 and 4, the second middle end cap 45, the second inner end cap 43, and the second outer end cap 44 are flush at the top. Facilitate the capping of the first bottle cap 310 to the top of the first containing cavity 100

In some examples of the present invention, as shown in fig. 1 and 4, a fourth connection pipe 321 is disposed on an inner peripheral wall of the housing 300, the fourth connection pipe 321 is disposed on the second bottle cap 320 in fig. 5, the fourth connection pipe 321 communicates with the fifth inlet and outlet 301, a fourth insertion tube 481 is disposed on the fourth end cap 48, and the fourth insertion tube 481 is connected to the fourth connection pipe 321 in an inserting manner. The insertion connection of the fourth insertion tube 481 and the fourth connection tube 321 ensures that no series flow occurs between the high-concentration waste liquid and the liquid to be purified. In addition, the fourth end cap 48 is ensured to be stably coupled to the bottom of the housing 300, preventing the spiral wound type reverse osmosis membrane element 3 from being positionally changed during the filtration process.

Optionally, a sealing ring 53 is disposed between the fourth cannula 481 and the fourth adapter 321 to improve the sealing performance.

In some specific examples, all parts in the second receiving chamber 200 are pre-assembled into a single piece, i.e., the spiral wound reverse osmosis membrane element 3, the waste water header 34, the reverse osmosis membrane bag 32, the third end cap 47, and the fourth end cap 48 are pre-connected into an integrated RO membrane cartridge. Even the transition port 332 and the sealing ring 53 at the fourth adapter 321 may be pre-assembled to the second cannula 471 and the fourth cannula 481.

Such an integrated RO membrane filter element can be directly inserted between the transition plate 331 and the second bottle cap 320 during assembly, and the assembly process of the whole machine is greatly simplified. And if second bottle lid 320 is the removable connection on bottle 330, that user's back of using also can change integration RO membrane filter core by oneself, and the operation step when user oneself changes is also very easy moreover, has improved user's the experience of changing the core, has reduced the cost of changing the core.

In some examples of the present invention, the first filter member 10 is a roll made of non-woven fabric, polypropylene layer, and carbon fiber, and has a long service life. When the filter is used for filtering tap water, silt, rust and residual chlorine can be removed preliminarily. Of course, the first filter member 10 may be formed by rolling only one or two of the filter layers, and is not particularly limited thereto.

In some examples of the present invention, the second filter 20 is a hollow carbon rod. The carbon rod can filter off peculiar smell, organic matters, colloid, iron, residual chlorine and the like in the water body, so that the second filter element 20 controls the water quality condition of the drinking water after water outlet and improves the taste. Of course, the second filter 20 may be formed by combining activated carbon particles, a filter screen and a frame, and is not limited to the arrangement of carbon rods. In addition, the carbon filter medium can be replaced by a KDF55 processing medium (high-purity copper/zinc alloy medium), residual chlorine in water is removed through electrochemical reaction, mineral scaling is reduced, suspended solid matters such as ferrous oxide and the like are reduced, microorganisms are inhibited, and heavy metals are removed.

To better understand the aspects of the embodiments of the present invention, the structure of the composite filter element assembly 1000 in one embodiment of the present invention is described below with reference to fig. 1-15.

The following embodiments describe the three-stage filtering function of the composite filter element assembly 1000 by taking purified tap water as an example, and describe a highly integrated design structure of the composite filter element assembly 1000. The first filter member 10 will be described by taking a roll-type primary filter member formed by rolling a nonwoven fabric, a polypropylene layer, carbon fibers, and a spacer 49 as an example; the reverse osmosis membrane bag 32 will be described by taking a high water saving side flow reverse osmosis water saving membrane as an example of intermediate filtration. The second filter 20 is explained by taking a cylindrical hollow carbon rod as an example of the final stage filtration.

As shown in fig. 1, 2, 3 and 4, a composite filter element assembly 1000 is vertically disposed, and includes a housing 300, where the housing 300 includes a bottle body 330, a first bottle cap 310 and a second bottle cap 320, where each bottle cap forms a screw thread sealing connection with the bottle body 330, and a sealing member is disposed at the sealing position. The first bottle cap 310 is provided with a first inlet and outlet 101 for inlet of tap water, a second inlet and outlet 102 for outlet of pre-positioned water, and a third inlet and outlet 201 for outlet of drinking water. The second bottle cap 320 is provided with a fourth inlet and outlet 302 for reverse osmosis pre-positioned water inlet and a fifth inlet and outlet 301 for reverse osmosis high salinity wastewater drainage.

As shown in fig. 1, the water stop assembly 50 is disposed at each of the fourth port 302 and the fifth port 301. Taking the water-stopping assembly 50 at the fourth port 302 in fig. 3 as an example, the water-stopping assembly 50 includes a water-stopping structure concave 51, a spring 52, a sealing ring 53 and a water-stopping structural member 54. The water stopping structure concave platform 51 is fixed in the second bottle cap 320, the water stopping structure concave platform 51 faces the fourth inlet/outlet 302 and is provided with a through hole for water passing on the water stopping structure concave platform 51. The water-stop structural member 54 is telescopically arranged in the water-stop structure concave platform 51, a part of the water-stop structural member 54 extends to the fourth inlet/outlet 302, the water-stop structural member 54 is provided with a limiting platform 541, and the diameter of the limiting platform 541 is larger than that of the fourth inlet/outlet 302. The spring 52 is located in the water stop structure concave 51 and stops against the water stop structure 54, so that the limiting platform 541 has a tendency to extend toward the fourth access 302. The water stop structure 54 is provided with a ring of sealing ring 53, and when the spring 52 can overcome the pressure of the water flow, the spring 52 stops the sealing ring 53 against the end surface of the fourth port 302, so that the fourth port 302 is blocked. When the external connection pipe is connected to the fourth port 302, a pin is provided on the external connection pipe to be inserted into the fourth port 302, so that the fourth port 302 is opened. Once the external connection pipe is pulled out from the fourth port 302, the fourth port 302 can be automatically closed by the water stop assembly 50. The arrangement of the water stop component 50 can facilitate the insertion of the composite filter element component 1000 into an external connecting pipe.

As shown in fig. 1, a transition plate 331 is integrally formed inside the housing 300 and is perpendicular to the wall of the cylinder, and the transition plate 331 axially separates the housing 300 to form a first accommodating chamber 100 and a second accommodating chamber 200. The middle part of the transition plate 331 is provided with a through transition port 332 along the axial direction.

As shown in fig. 1, two sets of filter units are disposed in the first receiving chamber 100, the first filter element 10 disposed on the outside is used as a primary filter unit, and the second filter element 20 disposed in the center of the first receiving chamber 100 is used as a final filter unit. The axial length of the first filter member 10 is greater than that of the second filter member 20, and the first filter member 10 and the second filter member 20 are separated from each other by providing a cylindrical water passage partition plate 46. An annular first uniform flow channel 11 is defined between the first filtering piece 10 and the inner wall of the first accommodating cavity 100, and the first uniform flow channel 11 is connected with the first inlet/outlet 101. An annular second uniform flow channel 12 is defined between the water path partition plate 46 and the first filtering piece 10, and the second uniform flow channel 12 is connected with the second inlet/outlet 102. An annular third uniform flow channel 21 is defined between the water path partition plate 46 and the second filtering piece 20, and a cylindrical fourth uniform flow channel 22 is arranged on one side of the second filtering piece 20 far away from the third uniform flow channel 21. The third equispaced flow channels 21 are connected to the transition port 332, and the fourth equispaced flow channels 22 are connected to the third inlet and outlet port 201.

As shown in fig. 1, 5 and 12, the first filter group 400 is provided with a first insertion tube 421 inserted into the transition port 332, a first sealing ring 335 is provided between the first insertion tube 421 and an inner wall of the transition port 332, the second filter group 500 is provided with a second insertion tube 471 inserted into the transition port 332, a second sealing ring 336 is provided between the second insertion tube 471 and the inner wall of the transition port 332, the first insertion tube 421 is inserted into the second insertion tube 471, the first sealing ring 335 is provided between the first insertion tube 421 and the second insertion tube 471, and the second sealing ring 336 is provided between the second insertion tube 471 and the transition port 332.

The transition plate 331 is provided with a first inner convex ring 333 around the transition port 332 on the side facing the first accommodating cavity 100, the transition plate 331 is provided with a second inner convex ring 334 around the transition port 332 on the side facing the second accommodating cavity 200, the outer contour of the first inner convex ring 333 is non-circular, the transition plate 331 is provided with a second outer convex ring 337 around the second inner convex ring 334 on the side facing the second accommodating cavity 200, the second outer convex ring 337 is spaced from the second inner convex ring 334 in the radial direction, and the second inner convex ring 334 and the second outer convex ring 337 are both in contact with the end face of the second filter group 500 to form a labyrinth seal. Both ends of the transition port 332 are provided with 45-degree chamfers, so that the first sealing ring 335 and the second sealing ring 336 can be conveniently guided into the transition port 332.

As shown in fig. 1 and 4, the upper end of the second filter member 20 is provided with a second inner end cap 43, and the lower end of the second filter member 20 is provided with a first inner end cap 41; the second inner end cap 43 is fitted on the axial end face of the second filter pack 20 remote from the transition port 332. The upper end of the first filter element 10 is provided with a second outer end cap 44, the axial end face of the first filter element 10 facing the transition port 332 is provided with a first outer end cap 42, and the first outer end cap 42 is integrally formed with a water path partition plate 46. A second middle end cover 45 is sleeved between the second outer end cover 44 and the second inner end cover 43, and the second middle end cover 45 is matched on the peripheral wall of the waterway partition plate 46. And a sealing element is additionally arranged between the second middle end cover 45 and the third connecting pipe 313, and a sealing element is additionally arranged between the second inner end cover 43 and the first connecting pipe 311.

As shown in fig. 1 and 4, the first connecting pipe 311, the second connecting pipe 312, and the third connecting pipe 313 are arranged on the first bottle cap 310, the second middle end cap 45 is connected with the third connecting pipe 313 in an inserting manner, and a channel for connecting the second inlet/outlet 102 is formed between the third connecting pipe 313 and the second outer end cap 44.

As shown in fig. 1, the third filter member 30 having a cylindrical shape is disposed in the second receiving chamber 200. The third filter element 30 and the inner wall of the second receiving chamber 200 define a fifth uniform flow channel 31 therebetween, and the central tube 33 of the third filter element 30 is disposed opposite to the transition port 332. The wall of the central tube 33 is provided with a filtered water inlet hole, and the wall of the central tube 33 is provided with a reverse osmosis membrane bag 32. The reverse osmosis membrane bags 32 are reverse osmosis membrane bags 32, each of the waste water headers 34 and the central pipe 33 is separated by a first portion of at least one of the reverse osmosis membrane bags 32, and a second portion of the plurality of reverse osmosis membrane bags 32 is formed to surround a group of the central pipe 33 and the plurality of waste water headers 34 to form a multi-layered spirally wound membrane module.

As shown in fig. 9 and 11, five waste water headers 34 are provided around the central pipe 33, and each waste water header 34 is connected to the fifth inlet/outlet 301 through the second end cap 320, and each waste water header 34 corresponds to one membrane bag.

As shown in fig. 1, 4, 5, 8, 9 and 10, the spiral reverse osmosis membrane element 3 is provided with a third end cap 47 and a fourth end cap 48 at both ends thereof, respectively, the third end cap 47 is sealed at one end of the third filtering channel 32 and the waste water passing chamber facing the first filtering unit 100, and the fourth end cap 48 is sealed at one end of the third filtering channel 32 and the filtered water passing chamber facing away from the first filtering unit 100. The third end cap 47 has a second insertion tube 471 and a third insertion tube 472 communicating with each other at both ends, the second insertion tube 471 is inserted into the transition port 332, and the third insertion tube 472 is connected to the central tube 33. The third end cap 47 is provided with a fool-proof protrusion 473 for fool-proof engagement with the waste pipe 34. The peripheral wall of the third end cap 47 is provided with a first assembly positioning structure 474 for fitting with the top of the third filter element 30. The fourth end cap 48 is provided with a waste 482 connected to the waste manifold 34. The second bottle cap 320 is provided with a fourth connecting pipe 321, the fourth connecting pipe 321 is communicated with the fifth inlet and outlet 301, the fourth end cap 48 is provided with a fourth insertion tube 481, and the fourth insertion tube 481 is connected with the fourth connecting pipe 321 in an inserting manner. The fourth end cap 48 is provided with a plug (not shown) that is in sealing engagement with the central tube 33. A sealing ring 53 is additionally arranged between the third end cover 47 and the first outer end cover 42, and a sealing ring 53 is additionally arranged between the first outer end cover 42 and the transition port 332.

The whole process of filtering the tap water is that the tap water enters the first uniform flow channel 11 from the first inlet/outlet 101, flows to the radial inner side, flows to the second uniform flow channel 12 after being filtered by the first filter element 10, and flows out as the front water from the second inlet/outlet 102 at the upper part. The effluent pre-water is pressurized and pumped into the fourth inlet/outlet 302, and is uniformly distributed in the fifth uniform flow channels 31, flows in from the side direction of the side flow reverse osmosis water-saving film and is filtered by the third filtering element 30, the high salinity wastewater is collected by the wastewater header 34 and is discharged from the fifth inlet/outlet 301, and the pure water is collected upwards by the central pipe 33 and passes through the transition port 332. The pure water enters the third uniform flow channel 21 from the transition port 332, is filtered by the second filtering piece 20, enters the fourth uniform flow channel 22 and flows out from the third inlet and outlet 201 for drinking.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "vertical", "top", "bottom", "inner", "outer", "axial", "radial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Other components of the composite filter element assembly 1000 according to embodiments of the present invention, such as the filtering function of each filter element, the selection of the material of each filter element, are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A composite filter element assembly, comprising:

the water pressure in the second accommodating cavity is higher than that in the first accommodating cavity;

the first filtering group is arranged in the first accommodating cavity, a first inserting pipe inserted into the transition port is arranged on the first filtering group, and a first sealing ring is arranged between the first inserting pipe and the inner wall of the transition port;

the second filters the group, the second filters the group and establishes the second holds the intracavity, be equipped with on the second filters the group and insert the intraoral second intubate of transition, the second intubate with be equipped with the second sealing washer between the inner wall of transition mouth, the second holds intracavity water process after the second filters the group filters, the process the transition mouth flow direction the first chamber that holds.

2. The composite filter element assembly of claim 1, wherein the first and second cannulas are inserted one into the other, the first and second sealing rings being radially arranged to form a double seal.

3. The composite filter element assembly according to claim 1, wherein the transition plate is provided with a first inner collar around the transition port at a side facing the first receiving cavity, and a second inner collar around the transition port at a side facing the second receiving cavity to extend an axial length of the transition port.

4. The composite filter element assembly of claim 3, wherein at least one of the first inner collar and the second inner collar is non-circular in outer profile.

5. The composite filter element assembly according to claim 3, wherein the transition plate is provided at a side facing the second receiving cavity with a second outer collar surrounding the second inner collar, the second outer collar being radially spaced from the second inner collar, the second outer collar each being in contact with an end face of the second filter group to form a labyrinth seal.

6. The composite filter element assembly of claim 1, wherein at least one end of the transition port is chamfered at 30 to 60 degrees to introduce the first seal ring and/or the second seal ring into the transition port.

7. The composite filter element assembly of claim 1, wherein the housing comprises: the bottle comprises a bottle body and two bottle caps, wherein the two ends of the bottle body are open, the two bottle caps are respectively in sealing fit with the two ends of the bottle body, and the transition plate is connected to the bottle body.

8. The composite filter element assembly of claim 7, wherein two of said caps are respectively spin welded or screwed to said body.

9. The composite filter element assembly of claim 7, wherein the transition plate is integrally formed on the bottle body or the transition plate is welded to the bottle body.

10. The composite filter element assembly of claim 1, wherein the housing defines a first inlet/outlet, a second inlet/outlet, and a third inlet/outlet, the first filter element comprising a first filter element and a second filter element,

first filter group includes the water route space bar, the water route space bar is established the first intracavity that holds, the water route space bar will the first chamber interval that holds goes out first low-pressure area and second low-pressure area, first filtration is established in the first low-pressure area, by first import and export the inflow water process follow behind the first filtration piece the second is imported and exported and is flowed, the second is established filter the piece in the second low-pressure area, follow the water process that the ferry mouth flowed in the second is filtered and is followed the third is imported and exported and flow.

11. The composite filter element assembly of claim 1, wherein the housing defines a fourth inlet/outlet and a fifth inlet/outlet,

the second filter bank includes: a spiral wound reverse osmosis membrane element comprising: the reverse osmosis membrane water purifier comprises a central pipe group and a plurality of reverse osmosis membrane bags, wherein the central pipe group comprises a central pipe and a plurality of waste water pipes arranged at intervals, the plurality of waste water pipes are arranged around the central pipe, the pipe wall of the central pipe is provided with filtered water inlet holes, and the pipe wall of each waste water pipe is provided with a waste water inlet hole;

said reverse osmosis membrane bags having a first portion located inside said central tube bank and a second portion located outside said central tube bank, each said waste and said central tube being separated by at least a first portion of said reverse osmosis membrane bags, said second portions of a plurality of said reverse osmosis membrane bags forming a multi-layer membrane module around the circumference of said central tube bank; wherein,

and water entering the second accommodating cavity from the fourth inlet and outlet flows to the filtered water inlet hole after being filtered by the reverse osmosis membrane bag, the wastewater pipe is connected with the fifth inlet and outlet, and the central pipe is connected with the transition port.