CN209352650U - Composite filter element - Google Patents

Abstract

The utility model discloses a composite filter element assembly, which comprises: a housing, a first filter group, and a second filter group, a first accommodation chamber and a second accommodation chamber are defined in the housing, and the first accommodation chamber It is separated from the second accommodation chamber by a transition plate, a transition port is provided on the transition plate, the water pressure in the second accommodation chamber is higher than the water pressure in the first accommodation chamber, the first filter group is set in the first accommodation chamber, The first filter group is provided with a first cannula inserted into the transition port, a first sealing ring is provided between the first cannula and the inner wall of the transition port, the second filter group is arranged in the second accommodation chamber, and the second filter The group is provided with a second intubation tube inserted into the transition port, and a second sealing ring is provided between the second intubation tube and the inner wall of the transition port. a receiving cavity. According to the composite filter element assembly of the embodiment of the utility model, the pipeline connection between the cavities is simple, has a good sealing effect, and has high reliability.

Description

Composite filter element

technical field

The utility model relates to the technical field of water purification, in particular to a composite filter element assembly.

Background technique

The tap water transported from urban waterworks to users usually contains a certain amount of salt ions, metal substances, chlorides, microorganisms, sediment and other substances. In order to improve the quality of drinking water, more and more families choose to install water purifiers on the outlet pipes of tap water. The water purifiers have filter elements with multiple functions to remove different types of harmful substances in the water.

Usually, the existing water purifier filter elements are generally 3 to 4 grades, and some manufacturers' water purifier filter elements are double-core. In order to improve the filtering effect of the composite filter element assembly, a variety of filter element assemblies are usually arranged in the water purifier. The inlet and outlet ports between each filter element assembly are connected in series in sequence, and the two sides of different filter elements form a water inlet cavity and an outlet cavity respectively. In order to achieve high-quality drinking water, it is often necessary to connect three-stage and four-stage filter elements in series. The water outlets and water inlets between different filter elements need to be connected by external pipes, which makes the composite filter element assembly piping system complicated. Water purifiers The whole machine takes up a lot of space, and it is inconvenient to install and replace the filter element.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, an object of the utility model is to propose a composite filter element assembly. Through the design of the transition plate, the housing can be divided into two cavities that can accommodate different filter materials, and the pipeline connection is simple and has a good closed effect.

The composite filter element assembly according to the embodiment of the present invention includes a housing, a first filter group and a second filter group, the housing defines a first accommodation chamber and a second accommodation chamber, the first accommodation chamber and the The second accommodation chambers are spaced apart by a transition plate, the transition plate is provided with a transition port, the water pressure in the second accommodation chamber is higher than the water pressure in the first accommodation chamber, and the first filter group is set In the first accommodating cavity, the first filter group is provided with a first cannula inserted into the transition port, and a first seal is provided between the first cannula and the inner wall of the transition port ring, the second filter group is set in the second accommodation chamber, the second filter group is provided with a second cannula inserted into the transition port, and the second cannula is connected to the transition port A second sealing ring is provided between the inner walls of the second accommodating chamber, and the water in the second accommodating chamber flows to the first accommodating chamber through the transition port after being filtered by the second filter group.

According to the composite filter element assembly of the embodiment of the utility model, the inner cavity of the housing is divided into a first accommodating cavity and a second accommodating cavity by a transition plate, and its design can also meet the water pressure requirements of different filter structures. Through the first cannula, the second cannula and the transition port, the first accommodating cavity and the second accommodating cavity can be communicated, and the first sealing ring and the second sealing ring can prevent the first accommodating cavity and the second accommodating cavity from communicating. Streaming, simple structure, good sealing effect, high reliability.

In addition, the composite filter element assembly according to the present invention can also have the following additional technical features:

In some embodiments of the present utility model, 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 Creates a double layer seal.

In some embodiments of the present invention, the transition plate is provided with a first inner convex ring around the transition port on the side facing the first accommodation cavity, and the transition plate is facing the second accommodation cavity. One side of the transition port is surrounded by a second inner convex ring to extend the axial length of the transition port.

Optionally, at least one of the first inner convex ring and the second inner convex ring has a non-circular outer contour.

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, and the second outer convex ring is connected to the second inner convex ring. The rings are radially spaced apart, and both the second inner convex ring and the second outer convex ring are in contact with the end surface of the second filter group to form a labyrinth seal.

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

In some embodiments of the present utility model, the housing includes: a bottle body with open ends and two bottle caps, and the two bottle caps are respectively sealed and fitted on the two ends of the bottle body, and the transition plate connected to the bottle.

Optionally, the two bottle caps are respectively screw-welded or screw-connected to the bottle body.

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

In some embodiments of the present utility model, the housing is provided with a first inlet and outlet, a second inlet and a third inlet, and the first filter group includes a first filter element and a second filter element, so The first filter group includes a waterway partition plate, the waterway partition plate is arranged in the first accommodation chamber, and the waterway partition plate separates the first accommodation chamber from the first low-pressure area and the second low-pressure area, so The first filter element is set in the first low-pressure area, the water flowing in from the first inlet and outlet passes through the first filter element and then flows out from the second inlet and outlet, and the second filter element is set in the In the second low-pressure zone, the water flowing in from the transition port passes through the second filter element and then flows out from the third inlet and outlet.

In some embodiments of the present utility model, the housing is provided with a fourth inlet and outlet and a fifth inlet and outlet, and the second filter group includes: a spiral-wound reverse osmosis membrane element, and the spiral-wound reverse osmosis The membrane element includes: a central tube group and a plurality of reverse osmosis membrane bags, the central tube group includes a central tube and a plurality of waste water pipes arranged at intervals, a plurality of waste water pipes are arranged around the central pipe, and the central The pipe wall of the pipe is provided with a filter water inlet hole, and the pipe wall of the waste water pipe is provided with a waste water inlet hole; the reverse osmosis membrane bag has a first part located inside the central pipe group and a a second portion outside the set, each of said waste water pipes and said center pipe being separated by at least one first portion of said reverse osmosis membrane bag, said second portion of a plurality of said reverse osmosis membrane bags forming A multi-layer membrane assembly surrounding the central tube group; wherein, the water entering the second accommodation chamber from the fourth inlet and outlet is filtered by the reverse osmosis membrane bag and then flows to the filtered water inlet hole , the waste water pipe is connected to the fifth inlet and outlet, and the central pipe is connected to the transition port.

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

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

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

Fig. 2 is the bottom view of the composite filter element assembly of one embodiment of the present invention;

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

Fig. 4 is a schematic diagram of the internal structure of the composite filter element assembly omitting the first filter group and the second filter group according to an embodiment of the present invention;

5 is a structural schematic diagram of a section of a bottle body of a composite filter element assembly according to an embodiment of the present invention;

Fig. 6 is a structural schematic diagram of a bottle body of a composite filter element assembly according to an embodiment of the present invention;

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

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

Fig. 9 is a three-dimensional structural schematic diagram of a center pipe and a waste water header of an embodiment of the present invention;

Fig. 10 is a top view of a reverse osmosis membrane bag, a central pipe, and a waste water header in an embodiment of the present invention;

Fig. 11 is a top view of a spiral-wound reverse osmosis membrane element in an embodiment of the present invention;

Fig. 12 is an enlarged view of the structure of part A in Fig. 1;

Fig. 13 is an enlarged view of the structure of part B in Fig. 5;

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

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

Reference signs:

Composite filter element assembly 1000;

The first containing chamber 100; the first filter group 400; the first low-pressure zone 1; the second low-pressure zone 2;

The first filter element 10; the first uniform flow channel 11; the second uniform flow channel 12;

The first import and export 101; the second import and export 102;

The second filter element 20; the third uniform flow channel 21; the fourth uniform flow channel 22;

The third import and export 201;

the first inner end cap 41;

The first outer end cap 42; the first cannula 421;

Second inner end cap 43; inner port 431; fifth cannula 432;

The second outer end cap 44; the outer port 441; the sixth cannula 442;

The second middle end cap 45; the middle port 451; the seventh cannula 452;

Waterway partition plate 46; Space bracket 49;

The second housing chamber 200; the second filter group 500; the spiral-wound reverse osmosis membrane element 3; the central tube group 13;

The fifth evenly distributed flow channel 31; the reverse osmosis membrane bag 32; the center pipe 33; the waste water header 34;

The fifth import and export 301; the fourth import and export 302;

The third end cap 47; the second intubation tube 471; the third intubation tube 472; the fool-proof protrusion 473;

The fourth end cap 48; the fourth intubation tube 481; the waste discharge port 482;

Water-stop assembly 50; water-stop structure concave platform 51; spring 52; sealing ring 53; water-stop structure 54; limiting platform 541;

housing 300;

The first bottle cap 310; the first connecting pipe 311; the second connecting pipe 312; the third connecting pipe 313;

The second bottle cap 320; the fourth connecting pipe 321;

Bottle body 330 ; transition plate 331 ; transition port 332 ; first inner convex ring 333 ; second inner convex ring 334 ; first sealing ring 335 ; second sealing ring 336 ; second outer convex ring 337 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

The following describes a composite filter element assembly 1000 according to an embodiment of the present invention with reference to FIGS. 1-15 .

The composite filter element assembly 1000 according to the embodiment of the present utility model, as shown in FIG. 1 , FIG. 3 , FIG. 5 and FIG. 12 , includes a housing 300 , a first filter group 400 and a second filter group 500 .

Wherein, the housing 300 defines a first accommodation chamber 100 and a second accommodation chamber 200 , and the first accommodation chamber 100 and the second accommodation chamber 200 are separated by a transition plate 331 , and a transition port 332 is provided on the transition plate 331 . Here, the transition plate 331 makes the first receiving chamber 100 and the second receiving chamber 200 form two generally separated cavities in the housing 300 , and the two cavities are only communicated through the transition port 332 .

The water pressure in the second accommodation chamber 200 is higher than the water pressure in the first accommodation chamber 100 , and its design can meet the water pressure requirements of different filter structures. For example, the filtration flow resistance in the first housing chamber 100 is small, so the first housing chamber 100 is designed as a low-pressure chamber, so that the water purification system does not need to configure a booster pump for the first housing chamber 100, the internal parts of the first housing chamber 100 and corresponding joints The pressure bearing is small, and the reliability requirements for parts assembly and sealing are low. However, the filtration flow resistance in the second accommodation chamber 200 is large. At this time, a booster pump can be separately configured for the second accommodation chamber 200 , and the pressure bearing capacity of the internal parts of the second accommodation chamber 200 and corresponding connecting pipes must be ensured. Setting them separately in this way is beneficial to reduce the cost.

Specifically, the first filter group 400 is set in the first housing chamber 100, the second filter group 500 is located in the second housing chamber 200, and the first filter group 400 can fully function in a low-pressure chamber with relatively low water pressure. For the filtering function, the second filtering group 500 needs to be in a high-pressure chamber with relatively high water pressure to fully exert the filtering function. Here, the water flow in the first storage chamber 100 may flow to the second storage chamber 200 through the transition port 332 after purification, or the water flow in the second storage chamber 200 may flow to the first storage chamber 100 through the transition port 332 after purification, here No limit.

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 provided 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 provided between the second insertion tube 471 and the inner wall of the transition port 332 . The water in the second accommodation chamber 200 flows to the first accommodation chamber 100 through the transition port 332 after being filtered by the second filter group 500 . The water is purified and filtered by the second filter group 500 and the first filter group 400, and the purification and filtration effect is good.

In addition, the first sealing ring 335 can block the gap between the first intubation tube 421 and the transition port 332, and the second sealing ring 336 can block the gap between the second intubation tube 471 and the transition port 332, preventing water from flowing through the gap. Internal seepage, so that the purified water and the unpurified water do not flow together, ensuring the filtering effect of the purified water.

According to the composite filter element assembly 1000 of the embodiment of the present utility model, the inner chamber of the housing 300 is divided into the first accommodation chamber 100 and the second accommodation chamber 200 by the transition plate 331 , and its design can also meet the water pressure requirements of different filter structures. Through the first cannula 421, the second cannula 471 and the transition port 332, the first accommodating chamber 100 and the second accommodating chamber 200 can be communicated, and the first accommodating chamber can be prevented from being closed by the first sealing ring 335 and the second sealing ring 336. When the 100 and the second accommodation chamber 200 are in communication, the flow is in series, the structure is simple, the sealing effect is good, and the reliability is high.

In some embodiments of the present utility model, as shown in Fig. 3, Fig. 5, Fig. 14 and Fig. 15, the housing 300 includes a bottle body 330 with open ends and two bottle caps, and the two bottle caps are sealed and fitted respectively Both ends of the bottle body 330 are connected to the bottle body 330 by transition plates 331 . Here, the two bottle caps may be detachably connected 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, the two bottle caps can also be non-detachably connected to the bottle body 330 . Optionally, the two bottle caps are connected to the bottle body 330 by welding or screwing respectively.

Optionally, the transition plate 331 is integrally formed on the bottle body 330 , or the transition plate 331 is welded on 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, which 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 avoid shock or two When the side pressure difference is too large, the transition plate 331 will be deflected in the bottle body 330, causing water leakage and the like. When the transition plate 331 can be connected to the bottle body 330 by welding, the bottle body 330 and the transition plate 331 can be manufactured separately, which can reduce processing difficulty and save production cost. Regardless of integral injection molding or welded connection, it can better withstand the pressure difference between the first accommodation chamber 100 and the second accommodation chamber 200, preventing the high-pressure water in the second accommodation chamber 200 from penetrating into the first accommodation chamber 200 through the transition port 332. in the chamber 100. Certainly, the transition plate 331 and the bottle body 330 may also have other connection relationships, which are not limited here.

In some embodiments of the present invention, as shown in FIGS. 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 Arranged radially to form a double 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 utility model, as shown in FIG. 1, FIG. 5 and FIG. 12, FIG. 14, and FIG. 15, the transition plate 331 is provided with a first inner The protruding ring 333 , the transition plate 331 is provided with a second inner protruding ring 334 around the transition opening 332 on the side facing the second receiving chamber 200 , so as to extend the axial length of the transition opening 332 . The assembly surfaces of the first cannula 421 and the second cannula 471 have a large size in the axial direction, which can provide stronger bending resistance and contact strength. At the same time, it is also beneficial for the first sealing ring 335 and the second sealing ring 336 to seal the first cannula 421 and the second cannula 471 at the transition port 332, which is convenient for installation and operation, and has better sealing performance. In addition, as shown in FIG. 12, the first inner convex ring 333 and the second inner convex ring 334 can block the water flow pressure in the radial direction, thereby reducing the pressure of the first sealing ring 335 and the second sealing ring 336 to seal water, Further enhance the sealing effect.

In some specific embodiments, at least one of the first inner convex ring 333 and the second inner convex ring 334 has a non-circular outer contour. In this way, when the bottle body 330 needs to be fixed, the non-circular first inner convex ring 333 or the second inner convex ring 334 may be used to fix and prevent rotation. The first filter group 400 and the second filter group 500 may be installed in the casing 300 in no particular order.

For example, in the example shown in FIG. 3 and FIG. 15 , the outer contour of the first inner convex ring 333 on the transition plate 331 is hexagonal. When the second filter group 500 is to be installed in the second housing chamber 200, first the bottle body 330 is turned upside down so that the opening of the second housing chamber 200 is upward, and then the bottle body 330 is fixed with a fixing tool for example, and the second The filter pack 500 is inserted from above. When the second bottle cap 320 is fixed to the bottle body 330 after being installed, the second bottle cap 320 is usually screwed down so that the second bottle cap 320 is tightly closed on the bottle body 330 . To ensure that the bottle body 330 can be completely fixed, a better method is to extend the fixing tool into the bottle body 330 and insert the first inner convex ring 333 into the fixing tool. Since the first inner convex ring 333 has a non-circular profile, non-circular fixing holes are provided on the fixing tool, so that the bottle body 330 does not rotate anymore.

Optionally, the transition plate 331 is provided with a second outer convex ring 337 surrounding the second inner convex ring 334 on the side facing the second accommodating cavity 200 , and the second outer convex ring 337 and the second inner convex ring 334 are radially Spaced apart, both the second inner convex ring 334 and the second outer convex ring 337 are in contact with the end surface of the second filter group 500 to form a labyrinth seal. Both the first inner convex ring 333 and the second inner convex ring 334 abut against the end face of the second filter group 500, which can block the flow of water in the radial direction to the transition port 332, so that the water undergoes double blocking, which is beneficial to improve the sealing sex.

In some embodiments of the present utility model, as shown in FIG. 1 , FIG. 5 and FIG. 13 , at least one end of the transition port 332 is provided with a chamfer of 30 degrees to 60 degrees, that is, one or both ends of the transition port 332 form a chamfer. The corner can facilitate the introduction of at least one of the first sealing ring 335 and the second sealing ring 336 into the transition port 332 . The chamfering here can remove the burrs produced during processing, and the chamfering can also increase the opening size of the transition port 332 to facilitate intubation. In addition, when the first filter group 400 is inserted into the transition port 332 through the first intubation 421, or the second filter group 500 is inserted into the transition port 332 through the second intubation 471, the design of the chamfer is used as a guide, which is beneficial to the filter group. Tighten in a direction coaxial with the transition port 332 to reduce the possibility of skewing during assembly.

In some embodiments, as shown in FIG. 1 , FIG. 2 and FIG. 4 , the housing 300 is provided with a first inlet and outlet 101 , a second inlet and outlet 102 , and a third inlet and outlet 201 , and the first filter group 400 includes a first filter Part 10, the second filter element 20 and the waterway partition plate 46, the waterway partition plate 46 is arranged in the first accommodation chamber 100, the waterway partition plate 46 separates the first accommodation chamber 100 from the first low-pressure zone 1 and the second low-pressure zone 2 , the first filter element 10 is set in the first low-pressure zone 1, the water flowing in from the first inlet and outlet 101 flows out from the second inlet and outlet 102 after passing through the first filter element 10, and the second filter element 20 is set in the second low-pressure zone 2, the water flowing in from the transition port 332 flows out from the third inlet and outlet 201 after passing through the second filter element 20. The first filter element 10 and the second filter element 20 in the first accommodation chamber 100 are separated to form two independent water purification channels. The waterway partition plate 46 divides the first accommodating chamber 100 into a first low-pressure zone 1 and a second low-pressure zone 2, the first low-pressure zone 1 communicates with the first inlet and outlet 101 and the second inlet and outlet 102, and the second low-pressure zone 2 communicates with the transition Port 332 is connected to the third entrance and exit 201.

Optionally, other filter elements can be connected between the two groups of filter elements; it is also possible to directly connect the water inlet of the first filter element 10 to the water outlet of the second filter element 20, or directly connect the water outlet of the first filter element 10 It is connected with the water inlet of the second filter element 20, so that the purified water path between the first filter element 10 and the second filter element 20 forms a front-to-back series relationship.

Optionally, as shown in FIG. 1 , a first uniform flow channel 11 is defined between the first filter element 10 and the inner wall of the first accommodation chamber 100 , and the first uniform flow channel 11 is connected to the first inlet and outlet 101 . A second evenly distributed flow channel 12 is defined between the waterway partition plate 46 and the first filter element 10 , and the second evenly distributed flow channel 12 is connected to the second inlet and outlet 102 .

A third uniform flow channel 21 is defined between the waterway partition plate 46 and the second filter element 20, and a fourth uniform flow channel 22 is provided on the side of the second filter element 20 away from the third uniform flow channel 21. One of the three uniformly distributed channels 21 and the fourth uniformly distributed channel 22 is connected to the third inlet and outlet 201 , and the other of the third uniformly distributed channel 21 and the fourth uniformly distributed channel 22 is connected to the transition port 332 . Here, when the third uniformly distributed flow channel 21 is connected to the transition port 332, the fourth uniformly distributed flow channel 22 is connected to the third inlet and outlet 201; when the third uniformly distributed flow channel 21 is connected to the third inlet and outlet 201, the fourth The evenly distributed channel 22 is connected to the transition port 332 .

Optionally, as shown in FIG. 1 and FIG. 3 , the first housing chamber 100 and the second housing chamber 200 are spaced apart in the axial direction, and one of the evenly distributed flow channels on both sides of the second filter element 20 passes through the transition plate 331 The transition port 332 of the second housing chamber 200 is connected to the second housing chamber 200, and the two housing chambers (100, 200) are closely matched, which saves the external connecting pipes that need to be laid when the water filtered by the second filter group flows to the second filter element 20 for filtration; It may be possible to save the external connection pipes that need to be laid when the water filtered by the second filter element 20 flows to the second filter group 500 for filtration. It is beneficial to reduce the overall size of the composite filter element assembly 1000 . It is beneficial to simplify the layout of external pipelines.

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, the water flow passes through the first filter element 10 and the second filter element. Most of the filter elements 20 pass through in the radial direction of the first accommodation cavity 100 , with a short passing path and a large flow rate. Moreover, when passing radially, the impurities on the surface of the filter element can be washed away, and the water flow can more easily wash away the impurities and then pass through the filter element. Most of the water flows in the axial direction of each filter element when it enters and exits the water, which is not only conducive to the uniform distribution of the water flow, but also helps to bring the washed impurities to the axial end, so as to avoid the impurities from blocking the surface of the filter element.

Compared with the integration of two sets of filter elements in one filter element assembly in the prior art, the utility model has a higher degree of integration and stronger functions. When replacing the filter element, it is only necessary to disassemble the different ends of the housing 300 and the corresponding end seals of each filter element, and then the corresponding filter element can be replaced. The replacement is simple and the operation is easy, which provides the possibility for customers to perform the replacement in person. Reduced maintenance costs.

Even if the filter elements in the housing cavity cannot be disassembled after being installed, since all the filter elements are arranged in the housing 300, only one set of positioning and installation structures is required for the overall installation of the composite filter element assembly 1000, which is simple to assemble and saves time.

In some examples of the present utility model, as shown in Fig. 1, Fig. 5, and Fig. 7, the waterway partition plate 46 is cylindrical, the second filter element 20 is located inside the waterway partition plate 46, and the first filter element 10 is located in the waterway partition plate. On the outside of the plate 46, optionally, the first filter element 10 and the second filter element 20 are also cylindrical, and the first filter element 10, the waterway partition plate 46 and the second filter element 20 are sleeved in sequence, and the second filter element 20 The central cavity is the fourth uniform flow channel 22. Here, the fourth evenly distributed flow channel 22 is located in the center of the first filter unit, which is cylindrical. On the outer side of the fourth uniformly distributed flow channel 22, a layer of second filter element 20, a layer of third uniformly distributed flow channel 21, a layer of waterway partition plate 46, and a layer of second uniformly distributed flow channel are respectively compactly arranged in the radial direction. 12. One layer of the first pass, one layer of the first uniform flow channel 11, the third uniform flow channel 21 and the second uniform flow channel 12 are separated from each other by a water channel partition plate 46. The first receiving chamber 100 has a compact overall layout, occupies less installation space, and has a high degree of integration. It is convenient to install the first filter element 10 and the second filter element 20 .

The first filter group 400 includes a first outer end cover 42, which is in sealing connection with one end of the waterway partition plate 46, and is provided with a first plug communicating with the second low-pressure area 2 on the first outer end cover 42. The tube 421 and the first insertion tube 421 are connected to the transition plate 331 , and a first sealing member is provided between the first insertion tube 421 and the transition plate 331 to prevent the high pressure chamber from communicating with the first low pressure area 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 liquid from flowing at the bottom. The waterway partition plate 46 is connected to the first outer end cover 42 , which facilitates the first outer end cover 42 to be securely arranged at a specific position, so that the second uniform flow channel 12 and the third uniform flow channel 21 are reliably separated. The first cannula 421 communicates with the second low-pressure zone 2 , and the water in the high-pressure chamber can enter the second low-pressure zone 2 through the first cannula 421 . Optionally, the waterway partition plate 46 and the first outer end cover 42 are integrally formed, which is convenient for processing and manufacturing.

Optionally, as shown in FIG. 1 , the first filter group 400 includes a second middle end cover 45, the second middle end cover 45 is sealingly connected with the other end of the waterway partition plate 46, and the second middle end cover 45 is provided with There is a seventh cannula 452 which is sealingly connected with the housing 300 .

In some embodiments of the present utility model, as shown in Fig. 1 and Fig. 2, the housing 300 is provided with a fourth inlet and outlet 302 and a fifth inlet and outlet 301, and the second filter group 500 includes: a spiral-wound reverse osmosis membrane Element 3, the spiral-wound reverse osmosis membrane element 3 includes: a central tube 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 the water is purified and filtered to form pure water, waste water. The central pipe group 13 includes a central pipe 33 and a plurality of waste water headers 34 arranged at intervals. A plurality of waste water headers 34 are arranged around the central pipe 33. The pipe wall of the central pipe 33 is provided with a filter water inlet hole. The waste water header 34 The wall of the pipe is provided with a waste water inlet hole, and the reverse osmosis membrane bag 32 has a first part positioned inside the central tube group 13 and a second part positioned outside the central tube group 13, and each waste water header 34 and the central tube 33 are at least The first part of a reverse osmosis membrane bag 32 is separated, and the second part of a plurality of reverse osmosis membrane bags 32 forms a multi-layer membrane assembly around the periphery of the central tube group 13; wherein, enter the high pressure from the fourth inlet and outlet 302 The water in the chamber is filtered by the reverse osmosis membrane bag 32 and flows to the filtered water inlet hole. The waste water header 34 is connected to the fifth inlet and outlet 301 , and the central pipe 33 is connected to the transition port 332 .

In some embodiments of the present utility model, as shown in FIG. 1 , the reverse osmosis membrane bag 32 is rolled into a cylindrical shape, and a fifth uniform distribution is defined between the reverse osmosis membrane bag 32 and the inner wall of the second accommodation chamber 200 . The flow channel 31 and the center of the reverse osmosis membrane bag 32 are set facing the transition port 332 . From the layout of the spiral-wound reverse osmosis membrane element 3 and the fifth uniformly distributed flow channel 31, when the water flow passes through the spiral-wound reverse osmosis membrane element 3, most of the water flows along the radial direction of the spiral-wound reverse osmosis membrane element 3. Passing through, the passing path is short and the circulation is large. Moreover, when passing radially, the impurities on the surface of the filter element can be washed away, and the water flow can more easily wash away the impurities and then pass through the filter element. When the filter element is fed with water, most of the water flow basically flows along the axial direction, which is not only conducive to the uniform distribution of the water flow, but also helps to bring the washed impurities to one end of the axial direction, so as to avoid the impurities from being blocked on the surface of the filter element.

The water flowing into the fifth uniform flow channel 31 passes through the reverse osmosis membrane bag 32 in the radial direction and flows towards the direction of the central pipe 33, and the water molecules continuously penetrate into the reverse osmosis membrane bag 32 Inside. Part of the purified water permeated into the reverse osmosis membrane bag 32 continues to flow radially toward the center pipe 33 , and part of it flows toward the center pipe 33 in a spiral direction due to the influence of the extension direction of the membrane. Finally, the purified water enters the central pipe 33 from the filtered water inlet hole, and then flows toward the transition port 332 . The water that has not permeated into the reverse osmosis membrane bag 32 is concentrated into the waste water manifold 34, and the remaining waste water flows to the waste water manifold on the wall of the waste water manifold 34. The waste water manifold 34 is connected to the fifth inlet and outlet 301 Connected, discharge waste water from the fifth inlet and outlet 301. When water passes through the reverse osmosis membrane bag 32, it passes radially, the passing path is short, and the flow rate is large, which has a flushing effect on the impurities on the surface of the reverse osmosis membrane bag 32. Permeate membrane bag 32 .

In some embodiments of the present invention, as shown in FIG. 1 , the second filter group 500 further includes: a third end cover 47 and a fourth end cover 48, the third end cover 47 and the fourth end cover 48 are respectively connected to At both axial ends of the spiral-wound reverse osmosis membrane element 3, the third end cover 47 is connected to the transition plate 331, the central pipe 33 is connected to the transition port 332 through the third end cover 47, and the waste water header 34 is connected to the transition plate 332 through the fourth end cover 48. The fifth entrance and exit are connected to 301. As shown in FIG. 1 , the two ends of the third end cap 47 are provided with a second insertion tube 471 and a third insertion tube 472 which communicate with each other, and the third insertion tube 472 is connected with 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 support connection at the top for the spiral-wound reverse osmosis membrane element 3 , effectively preventing liquids 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 for the bottom, effectively preventing liquids from crossing at the bottom. The waste water header 34 communicates with the waste discharge port 482 and the fifth inlet and outlet 301 , so that the high salinity waste water can flow out of the casing 300 fast enough.

The third end cover 47 is plugged on the central tube 33 through the third inserting tube 472. On the one hand, the surface contact between the third inserting tube 472 and the tube wall of the central tube 33 is used to realize sealing, and on the other hand, the positioning of the central tube 33 is convenient. And install, prevent center pipe 33 from skewing and leaking after long-term use.

In addition, as shown in Fig. 1 and Fig. 8, the third end cover 47 is provided with a fool-proof protrusion 473, and the fool-proof protrusion 473 is arranged correspondingly to the waste water header 34, and one end of the waste water header 34 is inserted on the fool-proof protrusion 473 , to facilitate the positioning and installation of the third end cover 47 and the wastewater header 34, and prevent the wastewater header 34 from skewing after long-term use.

Optionally, the axial ends of the rolled-out circular cylinder of the reverse osmosis membrane bag 32 are glued to the third end cap 47 and the fourth end cap 48 . This not only facilitates assembly, but also facilitates the installation of the integrated core, and facilitates sealing at the end.

Optionally, the reverse osmosis membrane bag 32 of the present utility model is a reverse osmosis membrane element (RO membrane element). High recovery rate of pure water and long service life of membrane bag.

Optionally, the reverse osmosis membrane bag 32 can also be an ultrafiltration membrane module, specifically, an existing ultrafiltration membrane cartridge in the market can be selected. The principles and techniques of ultrafiltration and reverse osmosis filtration are known to those skilled in the art, and will not be repeated in this utility model. In addition, when the reverse osmosis membrane bag 32 adopts the above-mentioned filter element, the liquid needs to be pressurized in advance and then pumped into the fourth inlet and outlet 302 .

The utility model is limited to "first", "second", "third", "fourth", and "fifth" features which may explicitly or implicitly include one or more of these features for distinguishing descriptions Features, without order, degree of severity.

In some embodiments of the present utility model, as shown in FIG. 1 , the composite filter element assembly 1000 further includes: a first inner end cover 41 , and the first inner end cover 41 fits on the shaft of the second filter element 20 facing the transition port 332 to the end face to block the second filter element 20 and the fourth uniform flow channel 22 . Here, the first inner end cover 41 blocks the second filter element 20 and the fourth uniform flow channel 22, which means that the first inner end cover 41 seals the second filter element 20 and the fourth uniform flow channel 22 The axial end surface of the second filter element 20 and the fourth uniform flow channel 22 cannot flow out or flow in from the axial end surface facing the transition port 332 . When a certain end cap mentioned below blocks a certain filter element and a certain uniform flow channel, its meaning is also the same, and will not be repeated in the following text.

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, effectively preventing the second filter element from The liquid to be purified on both sides of 20 is connected with the purified liquid at the bottom to ensure the filtering effect of the second filter element 20 .

Optionally, the first inner end cover 41 is provided with an inner flange protruding into the fourth uniformly distributed flow channel 22 , and the outer peripheral surface of the inner flange is in contact with the inner peripheral surface of the second filter element 20 . Optionally, the outer periphery of the first inner end cap 41 is provided with an outer flange, and the inner surface of the outer flange contacts the outer peripheral surface of the second filter element 20 . Each setting of the inner flange and the outer flange can enhance the liquid blocking effect of the first inner end cover 41 on the fourth uniformly distributed flow channel 22 and the end face of the second filter element 20; The fool-proof fit between the end cap 41 and the second filter element 20 is easy to assemble.

Specifically, the axial end surface of the second filter element 20 is glued to the first inner end cover 41, which not only facilitates assembly, but also facilitates the installation of the integrated core. Optionally, the second filter element 20 is sealed and connected to the first inner end cap 41 through a ring of hot melt adhesive.

Optionally, as shown in FIG. 1 , the middle part of the first outer end cover 42 protrudes upwards to form a boss, and the first inner end cover 41 is suspended above the boss. That is, there is a certain gap between the first inner end cover 41 and the boss, so that the third uniformly distributed flow channel 21 is kept in communication with the transition port 332, so that the gap between the second filter element 20 and the spiral wound reverse osmosis membrane element 3 Purified waterways connected in series. That is to say, the water filtered by the second filter element 20 can flow to the spiral-wound reverse osmosis membrane element 3 through the transition port 332, and be filtered again by the spiral-wound reverse osmosis membrane element 3; or, the spiral-wound reverse osmosis membrane element 3 can filter The final water can flow to the second filter element 20 through the transition port 332 and be filtered again by the second filter element 20 .

Optionally, the outer periphery of the first outer end cap 42 is provided with an outer flange, and the inner surface of the outer flange is in contact with the outer peripheral surface of the first filter element 10 . The outer flange is overlaid on the outside of the middle boss of the first outer end cap 42, and the outer flange and the two sides of the middle boss are blocked, which can strengthen the liquid sealing of the first outer end cap 42 to the end face of the first filter element 10 effect; and can form a fool-proof fit with the first filter element 10, which is easy to assemble.

Specifically, the axial end surface of the first filter element 10 is glued to the first outer end cover 42, which not only facilitates assembly, but also facilitates the installation of the integrated core. Optionally, the first filter element 10 is sealed and connected to the first outer end cover 42 through a ring of hot melt adhesive.

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

Optionally, the gap between the first inner end cap 41 and the first outer end cap 42 is relatively small, and the first inner end cap 41 is connected to the first outer end cap 42 when it receives a force toward the first outer end cap 42 . contact with each other, when the transition port 332 is squeezed by the first inner end cover 41, the gap becomes larger, and the water flow is more smooth. The first inner end cover 41 is set in a suspension design with a small distance from the first outer end cover 42 , so that the water pressure can achieve a delicate balance when the water flow passes through the second filter element 20 . That is, when the water pressure in the fourth evenly distributed channel 22 is greater than the water pressure at the transition port 332 , the first inner end cover 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 includes: a second inner end cover 43 and a second outer end cover 44 . Wherein, the second inner end cover 43 fits on the axial end surface of the second filter element 20 far away from the transition port 332 to block the second filter element 20, and the second inner end cover 43 is provided with a connection with the third inlet and outlet 201 internal port 431. 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, provides a direction for the third inlet and outlet 201, and effectively prevents the second filter element 20 from The liquid to be purified on both sides and the purified liquid are connected in series at the top, which further ensures 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 through the inner port 431 .

Optionally, the periphery of the second inner end cap 43 is provided with a downward turning edge, and the inner surface of the outer turning edge is in contact with the outer peripheral surface of the second filter element 20 . The second inner end cover 43 is provided with an inner flange extending into the fourth uniform flow channel 22 , and the outer peripheral surface of the inner flange is in contact with the inner peripheral surface of the second filter element 20 . The arrangement of the inner flange and the outer flange makes the connection between the second inner end cover 43 and the second filter element 20 tighter and increases the reliability of the connection. Both can enhance the liquid blocking effect of the second inner end cap 43 on the end surface of the second filter element 20 , and can form a fool-proof fit with the second inner end cap 43 , which is easy to assemble.

The second outer end cover 44 fits on the axial end surface of the first filter element 10 away from the transition port 332 to block the first filter element 10, and the second outer end cover 44 is provided with an outer port that covers the inner port 431 441. Correspondingly, the second outer end cap 44 closes the top of the first filter element 10 and the second uniform flow channel 12, and provides a connection for the first filter element 10, and provides a connection for the first inlet and outlet 101 and the second inlet and outlet 102. The separation effectively prevents the liquid to be purified and the purified liquid on both sides of the first filter element 10 from connecting at the top, further ensuring the filtering effect of the first filter element 10 .

Optionally, the periphery of the second outer end cap 44 is provided with a downward turning edge, and the inner surface of the outer turning edge is in contact with the outer peripheral surface of the first filter element 10 . The setting of the outer flange 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 both can enhance the liquid blocking effect of the second outer end cover 44 on the end surface of the first filter element 10 , and can form a fool-proof fit with the first filter element 10 , which is easy to assemble.

Specifically, the axial end surface of the first filter element 10 is glued to the second outer end cover 44, which not only facilitates assembly, but also facilitates the installation of the integral core. Optionally, the first filter element 10 is sealed and connected to the second outer end cover 44 through a ring of hot melt adhesive.

In some examples, as shown in FIG. 1 , a first connecting pipe 311 and a second connecting pipe 312 are provided on the inner peripheral wall of the housing 300 , and the inner port 431 of the second inner end cover 43 is plugged and connected with the first connecting pipe 311 . The outer ports 441 of the two outer end caps 44 are plugged and connected to the second connecting pipe 312 . This assembly method of plug-in connection makes it very easy to fix the first filter element and the second filter element in the housing 300 .

In this way, the position of the first filter element 10 is basically fixed, and the assembly step is only the process of inserting the two ends, so it can be seen that the assembly is very simple and time-saving. Moreover, as long as the housing 300 is not deformed, both ends of the first filter element 10 will not come out, which shows that the assembly reliability of the first filter element 10 is relatively high.

And one end of the second filter element 20 is plugged on the first connecting pipe 311 through the second inner end cap 43, the other end of the second filter element 20 is sealed by the first inner end cap 41, and the first inner end cap 41 is connected with the first inner end cap 41. The distance between the first outer end caps 42 is very small, which means that the other end of the second filter element 20 is supported by the first outer end caps 42 . In this way, the position of the second filter element 20 is also basically fixed, and the assembly step is only a process of inserting one end, so it can be seen that its assembly is very simple and time-saving. Moreover, as long as the housing 300 is not deformed, both ends of the second filter element 20 will not come out, which shows that the assembly reliability of the second filter element 20 is high.

In the example shown in FIG. 1 and FIG. 4 , a fifth cannula 432 is formed on the second inner end cap 43 , and the nozzle of the fifth cannula 432 forms the aforementioned inner port 431 . The fifth insertion tube 432 can be inserted into the first connection tube 311 , and the fifth insertion tube 432 can also be inserted outside the first connection tube 311 . In order to improve the sealing effect, a sealing ring 53 is provided between the fifth insertion tube 432 and the first connection tube 311 .

In the example shown in FIG. 1 and FIG. 4 , a sixth cannula 442 is formed on the second outer end cap 44 , and the nozzle of the sixth cannula 442 forms the above-mentioned outer port 441 . The sixth cannula 442 can be inserted into the second connecting pipe 312 , and the sixth cannula 442 can also be inserted outside the second connecting pipe 312 . To improve the sealing effect, a sealing ring 53 is provided between the sixth insertion tube 442 and the second connection tube 312 .

In some examples, as shown in FIG. 1 and FIG. 4 , a third connecting pipe 313 is provided on the inner peripheral wall of the housing 300 , and the middle port 451 of the second middle end cover 45 is inserted into the third connecting pipe 313 .

In the embodiment of the present utility model, the second middle end cover 45 may not be provided, so that the water channel partition plate 46 can be directly connected with the third connecting pipe 313, thus saving the number of parts. But because the second filter element 20 will be assembled to the inboard of waterway partition plate 46, if the opening of waterway partition plate 46 is small, it will not fit in; 10 assembly, the difficulty of overall assembly increases.

Therefore, it is proposed to set the second middle end cover 45 here. When assembling, the parts such as the second filter element 20 are first packed into the waterway partition plate 46, and then the second middle end cover 45 is connected to the waterway partition plate 46, which meets the requirements for assembly. Need to improve the reliability of the overall assembly. On the other hand, when the waterway partition plate 46 is integrally formed with the first outer end cover 42, it can be produced by integral injection molding. At this time, for the convenience of mold opening, it is not suitable to integrally inject the second middle end cover 45.

A third connecting pipe 313 is provided on the housing 300, and the third connecting pipe 313 is plugged and connected to the middle port 451. The only step for fixing the end of the waterway partition plate 46 is the plugging process. The assembly is very simple, time-saving and highly reliable. In the example shown in FIG. 1 , a seventh insertion tube 452 is formed on the second middle end cap 45 , and a nozzle of the seventh insertion tube 452 forms the above-mentioned middle port 451 . The seventh insertion tube 452 can be inserted into the third connection tube 313 , and the seventh insertion tube 452 can also be inserted outside the third connection tube 313 . In order to improve the sealing effect, a sealing ring 53 is provided between the seventh insertion tube 452 and the third connection pipe 313 , and a sealing ring 53 is also provided between the second middle end cover 45 and the waterway partition plate 46 .

In the example of FIG. 1 , the distance between the second middle end cap 45 and the second outer end cap 44 is small, so that the water pressure can reach a delicate balance when the water flow passes through the first filter element 10 . That is, when the inner water pressure of the waterway partition plate 46 is greater than the outer water pressure, the second middle end cap 45 may be squeezed against the second outer end cap 44 , slowing down the filtering speed of the first filter element 10 . When running normally, the water flow squeezes out the second middle end cover 45 and normally flows towards the second inlet and outlet 102 .

In some specific examples, all the parts in the first housing chamber 100 are pre-assembled into one piece, that is, the first filter element 10, the second filter element 20, the first inner end cover 41, the first outer end cover 42, the second inner end cover The end cap 43 , the second outer end cap 44 , and the second middle end cap 45 are pre-connected to form a front and rear integrated filter element. Even the sealing rings 53 at the first joint 311 , the second joint 312 , and the third joint 313 can be pre-assembled on the fifth cannula 432 , the sixth cannula 442 , and the seventh cannula 452 .

Such an integrated front and rear filter element can be directly inserted between the transition plate 331 and the first bottle cap 310 during assembly, which greatly simplifies the assembly process of the whole machine. Moreover, if the first bottle cap 310 is detachably connected to the bottle body 330, the user can also replace the front and rear integrated filter elements after use, and the operation steps when the user replaces it by himself is also very easy, which improves the user's convenience. Replacement experience and replacement cost.

Optionally, as shown in FIGS. 1 and 4 , the tops of the second middle end cap 45 , the second inner end cap 43 , and the second outer end cap 44 are flush. Facilitate the sealing of the first bottle cap 310 on the top of the first containing chamber 100

In some examples of the present utility model, as shown in FIG. 1 and FIG. 4 , a fourth connecting pipe 321 is provided on the inner peripheral wall of the casing 300 , and the above-mentioned fourth connecting pipe 321 is provided on the second bottle cap 320 in FIG. 5 . The fourth connecting pipe 321 communicates with the fifth inlet and outlet 301 , and the fourth end cap 48 is provided with a fourth inserting pipe 481 , and the fourth inserting pipe 481 is plugged and connected with the fourth connecting pipe 321 . The plug connection between the fourth cannula 481 and the fourth connecting pipe 321 ensures that there is no cross-flow between the high-concentration waste liquid and the liquid to be purified. In addition, it ensures that the fourth end cover 48 is stably connected to the bottom of the casing 300, preventing the position of the spiral-wound reverse osmosis membrane element 3 from changing during the filtration process.

Optionally, a sealing ring 53 is provided between the fourth insertion tube 481 and the fourth connection tube 321 to improve the sealing degree.

In some specific examples, all the parts in the second housing chamber 200 are pre-assembled into one piece, that is, the spiral-wound reverse osmosis membrane element 3, the waste water header 34, the reverse osmosis membrane bag 32, the third end cover 47, the fourth The end cap 48 is pre-connected to form an integrated RO membrane filter element. Even the sealing ring 53 at the transition port 332 and the fourth connecting pipe 321 can be pre-assembled on 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, which greatly simplifies the assembly process of the whole machine. And if the second bottle cap 320 is detachably connected to the bottle body 330, then the user can also replace the integrated RO membrane filter element by himself after use, and the operation steps when the user replaces it by himself is also very easy, which improves the user's convenience. The experience of core replacement reduces the cost of core replacement.

In some examples of the present invention, the first filter element 10 is a roll made of non-woven fabric, polypropylene layer, and carbon fiber, and has a long service life. When used to filter tap water, it can preliminarily remove sediment, rust and residual chlorine. Certainly, the first filter element 10 may also be rolled from filter layers of only one or two materials, which is not specifically limited here.

In some examples of the present invention, the second filter element 20 is a hollow carbon rod. It can be used for the final filtration of tap water. The carbon rod can filter out peculiar smell, organic matter, colloid, iron and residual chlorine in the water body, so that the second filter element 20 can control the quality of drinking water after the water is discharged and improve the taste. Of course, the second filter element 20 can also be composed of 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 also be replaced with KDF55 treatment medium (high-purity copper/zinc alloy medium), which can remove residual chlorine in water through electrochemical reaction, reduce mineral scaling, reduce suspended solids such as ferrous oxide, inhibit microorganisms, Removes heavy metals.

In order to better understand the solutions of the embodiments of the present invention, the structure of a composite filter element assembly 1000 in a specific embodiment of the present invention will be described below with reference to FIGS. 1-15 .

The following specific embodiments take the purification of tap water as an example to describe the three-stage filtering function of the composite filter element assembly 1000 , and illustrate the highly integrated integrated design structure of the composite filter element assembly 1000 . In addition, the first filter element 10 is illustrated as an example of a roll-type primary filter element rolled from non-woven fabric, polypropylene layer, carbon fiber and spacer bracket 49; Flow reverse osmosis water-saving membrane is used as an example of intermediate filtration for illustration. The second filter element 20 is described by taking a cylindrical hollow carbon rod as the final filter as an example.

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

As shown in FIG. 1 , both the fourth inlet and outlet 302 and the fifth inlet and outlet 301 are provided with a water stop assembly 50 . Taking the water-stop assembly 50 at the fourth inlet and outlet 302 in FIG. 3 as an example, the water-stop assembly 50 includes a water-stop structure recess 51 , a spring 52 , a sealing ring 53 and a water-stop structure 54 . The concave platform 51 of the water-stop structure is fixed in the second bottle cap 320 , the concave platform 51 of the water-stop structure opens toward the fourth inlet and outlet 302 , and the concave platform 51 of the water-stop structure is provided with a through hole for passing water. The water-stop structure 54 is telescopically arranged in the water-stop structure concave platform 51, a part of the water-stop structure 54 extends to the fourth inlet and outlet 302, and the water-stop structure 54 is provided with a limiting platform 541, and the diameter of the limiting platform 541 larger than the diameter of the fourth inlet and outlet 302 . The spring 52 is located in the recessed platform 51 of the water-stop structure and abuts against the water-stop structure 54 , so that the limiting platform 541 has a tendency to protrude toward the fourth inlet and outlet 302 . A sealing ring 53 is provided on the water-stop structure 54 . When the spring 52 can overcome the pressure of the water flow, the spring 52 stops the sealing ring 53 against the end face of the fourth inlet and outlet 302 to block the fourth inlet and outlet 302 . When the fourth inlet and outlet 302 is connected with an external connecting pipe, the external connecting pipe is provided with a pin inserted into the fourth inlet and outlet 302 to open the fourth inlet and outlet 302 . Once the external connecting pipe is unplugged from the fourth inlet and outlet 302 , the fourth inlet and outlet 302 can be automatically closed by the water stop assembly 50 . The setting of the water stop assembly 50 can facilitate the insertion of the composite filter element assembly 1000 into an external connecting pipe.

As shown in FIG. 1 , the inside of the casing 300 is integrally formed with a transition plate 331 perpendicular to the cylinder wall, and the transition plate 331 separates the casing 300 in the axial direction to form the first accommodating chamber 100 and the second accommodating chamber 200 . A central portion of the transition plate 331 is provided with a transition port 332 extending axially through it.

As shown in Figure 1, two groups of filter units are set in the first housing cavity 100, the first filter element 10 on the outside is used as the primary filter unit, and the second filter element at the center of the first housing cavity 100 is used as the primary filter unit. 20 as the final filter unit. The axial length of the first filter element 10 is greater than the axial length of the second filter element 20 , and the first filter element 10 and the second filter element 20 are separated by a cylindrical waterway partition plate 46 . An annular first evenly distributed flow channel 11 is defined between the first filter element 10 and the inner wall of the first receiving cavity 100 , and the first evenly distributed flow channel 11 is connected to the first inlet and outlet 101 . An annular second evenly distributed flow channel 12 is defined between the waterway partition plate 46 and the first filter element 10 , and the second evenly distributed flow channel 12 is connected to the second inlet and outlet 102 . An annular third uniform flow channel 21 is defined between the waterway partition plate 46 and the second filter element 20, and a cylindrical fourth uniform flow channel 21 is provided on the side of the second filter element 20 away from the third uniform flow channel 21. Runner 22. The third evenly distributed channel 21 is connected to the transition port 332 , and the fourth evenly distributed channel 22 is connected to the third inlet and outlet 201 .

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

The transition plate 331 is provided with a first inner convex ring 333 around the transition opening 332 on the side facing the first accommodation cavity 100 , and the transition plate 331 is provided with a second inner convex ring around the transition opening 332 on the side facing the second accommodation cavity 200 334, the outer contours of the first inner convex ring 333 are all non-circular, and the transition plate 331 is provided with a second outer convex ring 337 surrounding the second inner convex ring 334 on the side facing the second accommodation chamber 200, and the second outer convex ring 337 surrounds the second inner convex ring 334. The protruding ring 337 is radially spaced apart from the second inner protruding ring 334 , and both the second inner protruding ring 334 and the second outer protruding ring 337 are in contact with the end surface of the second filter group 500 to form a labyrinth seal. Both ends of the transition port 332 are provided with 45-degree chamfers to facilitate the introduction of the first sealing ring 335 and the second sealing ring 336 into the transition port 332 .

As shown in Figure 1 and Figure 4, the upper end of the second filter element 20 is provided with a second inner end cap 43, and the lower end of the second filter element 20 is provided with a first inner end cap 41; The axial end surface of the second filter element 20 away from the transition port 332 . The upper end of the first filter element 10 is provided with a second outer end cover 44, and the axial end surface of the first filter element 10 facing the transition port 332 is provided with a first outer end cover 42, and the first outer end cover 42 is integrally formed with Waterway 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 fits on the peripheral wall of the water channel partition plate 46 . A sealing member is provided between the second middle end cover 45 and the third connecting pipe 313 , and a sealing member is provided between the second inner end cover 43 and the first connecting pipe 311 .

As shown in Fig. 1 and Fig. 4, on the first bottle cap 310, the first connecting pipe 311, the second connecting pipe 312, the third connecting pipe 313, the second middle end cap 45 is connected with the third connecting pipe 313, and the third connecting pipe 313 and A passage connecting the second inlet and outlet 102 is formed between the second outer end covers 44 .

As shown in FIG. 1 , the cylindrical third filter element 30 is disposed in the second accommodating chamber 200 . A fifth uniform flow passage 31 is defined between the third filter element 30 and the inner wall of the second receiving chamber 200 , and the center pipe 33 in the center of the third filter element 30 is disposed facing the transition port 332 . The pipe wall of the central pipe 33 is provided with a filtered water inlet hole, and the pipe wall of the central pipe 33 is provided with a reverse osmosis membrane bag 32 . The reverse osmosis membrane bag 32 is a reverse osmosis membrane bag 32, and the reverse osmosis membrane bag 32 has a first part and a second part, and each waste water header 34 and the central pipe 33 are surrounded by at least one first part of the reverse osmosis membrane bag 32. Separated, the second part of the plurality of reverse osmosis membrane bags 32 is formed to surround the tube group composed of the central tube 33 and the plurality of waste water headers 34 to form a multi-layer spiral-wound membrane module.

As shown in Figure 9 and Figure 11, the periphery of central pipe 33 is annular and is provided with five waste water headers 34, each waste water header 34 passes through the second end cover 320 and is connected with the fifth inlet and outlet 301, each waste water collector The tube 34 corresponds to a membrane bag.

As shown in Figure 1, Figure 4, Figure 5, Figure 8, Figure 9, and Figure 10, the two ends of the spiral-wound reverse osmosis membrane element 3 are respectively provided with a third end cover 47 and a fourth end cover 48, the third end The cover 47 is sealed on the end of the third filter channel 32 and the waste water flow cavity facing the first filter unit 100 , and the fourth end cap 48 is sealed on the end of the third filter channel 32 and the filtered water flow cavity away from the first filter unit 100 . Both ends of the third end cap 47 are provided with a second insertion tube 471 and a third insertion tube 472 , 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 cover 47 is provided with a fool-proof protrusion 473 for fool-proof cooperation with the waste water pipe 34 . The peripheral wall of the third end cover 47 is provided with a first assembly and positioning structure 474 to be assembled with the top of the third filter element 30 . The fourth end cover 48 is provided with a waste discharge port 482 connected to the waste water header 34 . The second bottle cap 320 is provided with a fourth connecting pipe 321, the fourth connecting pipe 321 communicates with the fifth inlet and outlet 301, the fourth end cap 48 is provided with a fourth insertion pipe 481, and the fourth insertion pipe 481 is inserted into the fourth connection pipe 321 connected. The fourth end cover 48 is provided with a blocking block (not shown in the figure) which is closed and matched with the central pipe 33 . A sealing ring 53 is provided between the third end cover 47 and the first outer end cover 42 , and a sealing ring 53 is provided between the first outer end cover 42 and the transition port 332 .

The entire tap water filtering process is that tap water enters the first uniform flow channel 11 from the first inlet and outlet 101, and flows radially inward, flows to the second uniform flow channel 12 after being filtered by the first filter element 10, and flows from The second inlet and outlet 102 on the upper part flows out as front water. The outflowing pre-water is pressurized and pumped into the fourth inlet and outlet 302, and evenly distributed in the fifth uniform flow channel 31, and flows in from the side of the side-flow reverse osmosis water-saving membrane and is passed by the third filter element 30 Filtration, high-salinity waste water is collected by the waste water header 34 and discharged from the fifth inlet and outlet 301 , and pure water is collected upward by the central pipe 33 and passed through the transition port 332 . Pure water enters the third uniform flow channel 21 from the transition port 332 , is filtered by the second filter element 20 , enters the fourth uniform flow channel 22 , and flows out from the third inlet and outlet 201 for drinking.

In describing the present invention, it should be understood that the terms "centre", "length", "upper", "lower", "vertical", "top", "bottom", "inner", "outer" The orientations or positional relationships indicated by , "axial", "radial", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

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

In the description of this specification, descriptions with reference to the terms "embodiment", "example" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (11)

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.