CN215975219U

CN215975219U - Waterway system and water purifier

Info

Publication number: CN215975219U
Application number: CN202122086852.5U
Authority: CN
Inventors: 谈菲; 廖榆敏; 高宏; 柯映充; 李海兰
Original assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Current assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-08
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a waterway system and a water inlet device, wherein the waterway system is provided with a water source inlet and a pure water outlet and comprises a desalination filter element, two front filter elements, a rear filter element and a one-way loop valve assembly. Wherein, the desalination filter core is arranged on a flow path from the water source inlet to the pure water outlet. The two preposed filter elements are arranged at the upstream of the desalination filter element, and a water inlet flow path is formed between the water source inlet and the desalination filter element. The post-positioned filter element is arranged at the downstream of the desalination filter element, and a water outlet flow path is formed between the pure water outlet and the desalination filter element. The one-way return valve assembly has a return water inlet in communication with the water outlet flow path and a return water outlet in communication with the water inlet flow path. The technical scheme of the utility model has the advantage that the desalination rate of the waterway system is adjustable.

Description

Waterway system and water purifier

Technical Field

The utility model relates to the technical field of water purification, in particular to a waterway system and a water purifier.

Background

The water purifier is also called water purifier and water quality purifier, and is water treatment equipment for deeply filtering and purifying water according to the use requirement of water. The core of the technology is a filtering membrane in a filter element device, and the main technology is derived from three types, namely an ultrafiltration membrane, an RO reverse osmosis membrane and a nanofiltration membrane. The water purifier can be divided into a gradually-tightening type water purifier and a self-cleaning type water purifier according to the design grade of the pipeline. The traditional water purifier is a gradually-tightened water purifier, an internal pipeline of the water purifier is provided with a filter element which is loose in front and tight in back, and the water purifier is composed of a PP melt-blown filter element, granular carbon, compressed carbon, an RO reverse osmosis membrane or an ultrafiltration membrane and post-positioned active carbon, wherein the 5 grades are sequentially connected end to end.

The water purifier has the functions of filtering floating matters, heavy metals, bacteria, viruses, residual chlorine, silt, rust, microorganisms and the like in water, and has high-precision filtering technology, a first-stage filter element of five-stage filtering technology of the water purifier used in a family is also called a PP cotton filter element (PPF), a second-stage granular activated carbon (UDF) filter element, a third-stage filter element of precise compressed activated Carbon (CTO), a fourth-stage filter element of reverse osmosis membrane or ultrafiltration membrane, and a fifth-stage filter element of post-positioned activated carbon (small T33). The water purifier is suitable for regions with serious tap water pollution, can filter residual chlorine in the conventional tap water, and can improve the taste of the water.

The water purifier is used as household equipment for purifying drinking water and is more and more widely used in families, but along with the higher and higher requirements of users on water quality, the requirements on the functions of the water purifier are also higher and higher.

The common water purification system is a reverse osmosis water purifier, the common desalination rate of a reverse osmosis membrane is more than 95%, the desalination rate of a nanofiltration membrane is mostly lower than 50%, and the main membrane elements in the current market are rolled into a plurality of single reverse osmosis membranes to be rolled into membrane elements with the same desalination rate as the membranes, or a single nanofiltration membrane is rolled into a nanofiltration filter element.

At present, mineral retention in the market has different requirements for different crowds, however, the existing reverse osmosis and nanofiltration water purifiers contain reverse osmosis and/or nanofiltration filter elements, and when water quality is purified, the desalination rate is different according to different rolling modes, but the effluent desalination rate of a water channel is a single value and cannot be regulated and controlled no matter which type of rolled filter element is adopted.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a water purifier, and aims to solve the problem that the desalination rate of the existing water purifier is not adjustable when the existing water purifier purifies water.

In order to achieve the purpose, the waterway system provided by the utility model is provided with a water source inlet and a pure water outlet, and comprises a desalination filter element, two front filter elements, a rear filter element and a one-way loop valve assembly. Wherein, the desalination filter core is arranged on a flow path from the water source inlet to the pure water outlet. The two preposed filter elements are arranged at the upstream of the desalination filter element, and a water inlet flow path is formed between the water source inlet and the desalination filter element. The post-positioned filter element is arranged at the downstream of the desalination filter element, and a water outlet flow path is formed between the pure water outlet and the desalination filter element. The one-way return valve assembly has a return water inlet in communication with the water outlet flow path and a return water outlet in communication with the water inlet flow path.

In one embodiment, the desalination filter element comprises a scroll filter element or a nanofiltration filter element.

In one embodiment, the two pre-filter elements comprise a PP cotton filter element and a pre-activated carbon filter element, and the PP cotton filter element is positioned at the upstream of the pre-activated carbon filter element.

In one embodiment, the post-filter element comprises a post-activated carbon filter element.

In one embodiment, the amount of backflow by the one-way backflow valve assembly is adjustable.

In one embodiment, the one-way backflow valve assembly includes a backflow valve and a one-way valve, the backflow valve being in series with the one-way valve.

In one embodiment, a flow path between the water source inlet and the inlet of the PP cotton filter element is communicated with the return water outlet;

the flow path between the pure water outlet and the rear activated carbon filter element is communicated with the backflow water inlet; or the flow path between the mixing and rolling filter element and the rear active carbon is communicated with the backflow water inlet.

In one embodiment, a flow path between the PP cotton filter element and the front activated carbon filter element is communicated with the return water outlet;

In one embodiment, a flow path between the mixing and rolling filter element and the front activated carbon filter element is communicated with the return water outlet;

the flow path between the rear activated carbon filter element and the mixed roll filter element is communicated with the backflow water inlet; or a flow path between the post-positioned active carbon filter element and the pure water outlet is communicated with the backflow water inlet.

In an embodiment, the waterway system further comprises a booster pump, and the booster pump is positioned on a flow path between the mixed roll filter element and the front activated carbon filter element.

In one embodiment, the waterway system further has a wastewater outlet, and the roll-mixing filter element has a first wastewater outlet, and the wastewater outlet is communicated with the first wastewater outlet.

In an embodiment, the waste water outlet is communicated with the first waste water outlet to form a waste water flow path, and a waste water valve is arranged on the waste water flow path.

In one embodiment, the roll-mixed filter element comprises at least one nanofiltration membrane and at least one reverse osmosis membrane.

In one embodiment, the reverse osmosis membrane has a salt rejection of not less than 90% and not greater than 99%, and the nanofiltration membrane has a salt rejection of not greater than 90%.

The utility model also provides a water purifier, which comprises a waterway system, wherein the waterway system is provided with a water source inlet and a pure water outlet, and comprises a desalination filter element, two front filter elements, a rear filter element and a one-way loop valve assembly. Wherein, the desalination filter core is arranged on a flow path from the water source inlet to the pure water outlet. The two preposed filter elements are arranged at the upstream of the desalination filter element, and a water inlet flow path is formed between the water source inlet and the desalination filter element. The post-positioned filter element is arranged at the downstream of the desalination filter element, and a water outlet flow path is formed between the pure water outlet and the desalination filter element. The one-way return valve assembly has a return water inlet in communication with the water outlet flow path and a return water outlet in communication with the water inlet flow path.

According to the technical scheme, the one-way backflow valve assembly is arranged on the water path system containing the desalination filter element, so that the pure water regulation and control part filtered by the desalination filter element flows back to be mixed with the unfiltered water flow, the TDS value of the inlet water is reduced, the mixed water flow enters the desalination filter element again, and the effect of adjusting the whole desalination rate is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first embodiment of a combination of a mixed-rolling filter element inner membrane unit of a waterway system of the utility model;

FIG. 2 is a schematic structural diagram of a second embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 3 is a schematic structural diagram of a third embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 4 is a schematic structural diagram of a fourth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 5 is a schematic structural diagram of a fifth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 6 is a schematic structural diagram of a sixth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 7 is a schematic structural diagram of a seventh embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 8 is a schematic structural diagram of an eighth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 9 is a schematic structural diagram of a ninth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 10 is a schematic structural diagram of a tenth embodiment of a combination of mixed-rolling cartridge inner membrane units of a waterway system of the present invention;

FIG. 11 is a schematic structural diagram of an eleventh embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 12 is a schematic structural diagram of a twelfth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

FIG. 13 is a schematic structural diagram of a thirteenth embodiment of a combination of a mixed-rolling cartridge inner membrane unit of a waterway system of the present invention;

fig. 14 is a schematic structural view of a fourteenth embodiment of a combination of mixed-roll cartridge inner membrane units of a waterway system of the present invention;

fig. 15 is a schematic structural view of a fifteenth embodiment of a combination of a mixed-roll filter element inner membrane unit of a waterway system of the present invention;

fig. 16 is a schematic structural view of a sixteenth embodiment of a combination of a mixed-rolling filter element inner membrane unit of the waterway system of the present invention;

fig. 17 is a schematic structural view of a seventeenth embodiment of a combination of a mixed-rolling filter element inner membrane unit of a waterway system of the present invention;

fig. 18 is a schematic structural view of an eighteenth embodiment of a combination of mixed-roll cartridge inner membrane units of a waterway system of the present invention;

FIG. 19 is a schematic structural diagram of a nineteenth embodiment of a combination of a mixed-roll cartridge inner membrane unit of a waterway system of the present invention;

FIG. 20 is a schematic structural view of a twentieth embodiment of a combination of mixed-roll cartridge inner membrane units of a waterway system of the present invention;

FIG. 21 is a schematic structural diagram of a twenty-first embodiment of a combination of mixed-roll cartridge inner membrane units of a waterway system of the present invention;

FIG. 22 is a schematic structural view of a waterway system according to a first embodiment of the present invention;

FIG. 23 is a schematic structural view of a waterway system according to a second embodiment of the present invention;

FIG. 24 is a schematic structural view of a waterway system according to a third embodiment of the present invention;

FIG. 25 is a schematic structural view of a waterway system according to a fourth embodiment of the present invention;

FIG. 26 is a schematic structural view of a fifth embodiment of a waterway system of the present invention;

fig. 27 is a schematic structural view of a waterway system according to a sixth embodiment of the present invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a waterway system and a purifier comprising the same.

The reverse osmosis water purifier is mostly used in a common water purification system, the reverse osmosis membrane 63 generally has a high desalination rate of 90-99%, and the nanofiltration membrane 62 generally has a low desalination rate of 30-70%. At present, two types of membrane elements are mainly rolled in the market, wherein one type is a multi-page single reverse osmosis membrane 63 which is rolled into a membrane element with the same desalination rate as the membrane; and the other is that a plurality of pages of single nanofiltration membrane sheets 62 are rolled to form the nanofiltration filter core. The former has too high desalination rate, and although it is not easy to scale, it does not meet the requirement of users for mineral ions. The latter has low desalination rate, and although mineral ions are more reserved, the effluent is easy to scale, and the user experience effect is poor.

In the application, the membrane sheets with different desalination rates are mixed and rolled to form the mixed roll filter element 60, so that the final finished mixed membrane reaches the required desalination rate, the effluent can not scale, and partial mineral substances can be reserved. Taking the reverse osmosis membrane 63 with a desalination rate of 95% and the nanofiltration membrane 62 with a desalination rate of 50% as an example, the desalination rate of the mixed membrane after the two are mixed is between 50% and 95%, and may be, for example, 60%, 65%, 70%, 75%, 80%, etc. If the salt rejection rate is required to be increased, the occupancy rate of the reverse osmosis membrane 63 may be increased; the stock entry requires that the salt rejection rate be reduced and the occupancy of the nanofiltration membrane 62 can be increased.

The construction of the mixing roll cartridge 60 will be described in detail below.

Referring to fig. 1 to 21, in one embodiment, the mixed-volume filter element 60 includes a central pipe 61 and a filter membrane element wound around the outer circumference of the central pipe 61, and the filter membrane element includes at least one nanofiltration membrane sheet 62 and at least one reverse osmosis membrane sheet 63.

The membrane number of the membrane elements comprises two or more membrane sheets with different salt rejection rates. When the membrane element is rolled, different membranes are placed page by page to be rolled, the placing sequence of different membranes is not limited, the membranes with low desalination rate can be placed at first, the membranes with high desalination rate can also be placed at first, and the desalination rate ranges of two membranes are as follows: the high-desalination-rate membrane (reverse osmosis membrane also becomes RO membrane) has a desalination rate in the range of 90% -99%, the low-desalination-rate membrane (nanofiltration membrane) has a desalination rate in the range of 0% -90%, and if the third membrane is used, the third membrane has a desalination rate in the range of 40% -90%; finally, the whole desalination rate of the membrane element can be adjusted to 0-99%.

Generally, the membrane element with more than two pages is suitable for a mixed rolling scheme, so that the aim of adjusting the desalination rate of effluent is fulfilled:

the two pages of membrane filter cores can be subjected to one-page nanofiltration and one-page reverse osmosis for mixed rolling, and the desalination rate is adjusted; the order of placement of the two membranes is not particularly critical.

The three-page membrane filter core can be subjected to one-page nanofiltration and two-page reverse osmosis mixed rolling, or the two-page nanofiltration and the one-page reverse osmosis mixed rolling, and the desalination rate is adjusted; the order of placement of the two membranes is not particularly critical.

The four-page membrane filter core can be subjected to one-page nanofiltration and three-page reverse osmosis for mixed rolling, two-page nanofiltration and two-page reverse osmosis are performed for rolling, three-page nanofiltration and one-page reverse osmosis are performed for mixed rolling, and the desalination rate is adjusted; the order of placement of the two membranes is not particularly critical.

Five pages of membrane filter cores can be subjected to one-page nanofiltration and four-page reverse osmosis for mixed rolling; carrying out mixed rolling on the two-page nanofiltration and the three-page reverse osmosis; carrying out mixed rolling on three pages of nanofiltration and two pages of reverse osmosis; carrying out mixed rolling on four pages of nano-filtration and one page of reverse osmosis, and adjusting the desalination rate; the order of placement of the two membranes is not particularly critical.

The six-page membrane filter core can be subjected to one-page nanofiltration and five-page reverse osmosis for mixed rolling; carrying out mixed rolling on two pages of nano-filtration and four pages of reverse osmosis; carrying out mixed rolling on three-page nanofiltration and three-page reverse osmosis; carrying out mixed rolling on four-page nanofiltration and two-page reverse osmosis, carrying out mixed rolling on five-page nanofiltration and one-page reverse osmosis, and adjusting the desalination rate; the order of placement of the two membranes is not particularly critical.

The seven-page membrane filter core can be subjected to one-page nanofiltration and six-page reverse osmosis for mixed rolling; carrying out mixed rolling on two pages of nano-filtration and five pages of reverse osmosis; carrying out mixed rolling on three-page nanofiltration and four-page reverse osmosis; carrying out mixed rolling on four-page nanofiltration and three-page reverse osmosis, carrying out mixed rolling on five-page nanofiltration and two-page reverse osmosis, carrying out mixed rolling on six-page nanofiltration and one-page reverse osmosis, and adjusting the desalination rate; the order of placement of the two membranes is not particularly critical. Such an analogy is repeated.

Therefore, the effluent desalination rate of the mixed roll filter element 60 is different according to different membrane pages and proportions, and the desalination rate range is approximately 10-99%. Of course, the salt rejection rate of the roll-mixed filter element 60 is constant when the user uses the roll-mixed filter element. For example, children or juveniles, which are in growing development stage, have a high demand for mineral ions (especially calcium ions and other trace elements), and such people have a high demand for mineral ions in water quality, so the demand for salt rejection rate is low.

The middle-aged people have low demand for mineral ions, and the people tend to be soft water (the content of the mineral ions is extremely low); in addition, soft water is generally preferably used for washing water for clothes, towels, and the like in order to prevent the clothes and towels from hardening.

The elderly have severe loss of body minerals (especially calcium) and are prone to osteoporosis, and this group has a high demand for mineral ions in drinking water and therefore has a low demand for salt rejection.

The desalination rate of the mixed-rolling filter element 60 is different according to different rolling modes, but the effluent desalination rate of the water channel system is a single value, and the desalination rate cannot be adjusted, and is only the specific desalination rate of the mixed-rolling filter element 60. The desalination rates of the mixed-rolling filter elements 60 with different proportions are different according to the proportions, and the desalination rate is a certain specific value within a certain range, for example, the desalination rate of a page of reverse osmosis plus a page of nanofiltration membrane is a certain numerical value between 55% and 65% due to membrane fluctuation; the salt rejection, which is desired to be different, can be selected from the following table, for example:

TABLE 1 relationship between the number of RO pages and NF pages and the salt rejection

That is, if a user thinks that pure water with different salt rejection rates is obtained, different types of filter elements need to be selected according to the requirements of the user.

However, as the mixed roll filter element 60, it is difficult for any one of the above schemes of RO number and NF number to meet the requirements of different people at the same time. This is obviously too complicated if different groups of people require different types of filter elements to be replaced, or if a plurality of water systems containing mixed rolls of filter elements 60 with different salt rejection rates are provided.

Although the aforesaid mixes a roll filter core 60 and can't satisfy the user demand, above-mentioned mixing roll filter core 60 can regard as the filter assembly who adjusts the desalination, and its adjustable principle is through the pure water backward flow to with do not have filterable rivers to mix, thereby reduce into water TDS value, the rivers of mixing get into once more and mix in rolling filter core 60, thereby reach the effect that promotes whole desalination.

Specifically, the waterway system of the utility model is provided with a water source inlet 101 and a pure water outlet 102, and the waterway system is provided with the water source inlet 101 and the pure water outlet 102 and comprises a desalination filter element 10, two front filter elements 20, a rear filter element 30 and a one-way backflow valve assembly 11. The desalination filter element 10 is provided in a flow path from the water source inlet 101 to the pure water outlet 102. The two preposed filter elements 20 are arranged at the upstream of the desalination filter element 10, and a water inlet flow path is formed between the water source inlet 101 and the desalination filter element 10. The post-filter element 30 is disposed downstream of the desalination filter element 10, and an outlet flow path is formed between the pure water outlet 102 and the desalination filter element 10. The one-way return valve assembly 11 has a return water inlet communicating with the water outlet flow path and a return water outlet communicating with the water inlet flow path. Here, the desalination filter element 10 may be a mixed-volume filter element 60, or a nanofiltration filter element.

In order to achieve the backflow effect, in the present embodiment, the one-way backflow valve assembly 11 plays a key role in returning the filtered pure water (filtered by the mixing and rolling filter element 60) to be mixed with the unfiltered water flow. The one-way return valve assembly 11 may be a single one-way valve 11a or a single one-way valve 11a may be connected in series with a return valve 11 b. The following description will be made by taking the salt rejection of the mixed roll filter 60 as an example of 75%.

For a single check valve 11a, the check valve 11a may have both opening and closing functions. When the one-way valve 11a is closed, the desalination rate of the water flow purified by the water path system is 75%; when the check valve 11a is opened, the water flow purified by the water circuit system has a desalination rate higher than 75% (e.g., 65%, 68%, 70%, etc.).

Referring to fig. 25, for the case of the check valve 11a and the return valve 11b, the one-way return valve assembly 11 is capable of adjusting the amount of water output, and the amount of water return can be adjusted according to the user's requirement. For example, the size of the valve hole of the return valve 11b can be adjusted, so that the desalination rate of the effluent can be adjusted. Here, the check valve 11a may be normally open, and the amount of backflow of the entire check backflow valve assembly 11 may be controlled by the backflow valve 11 b; the check valve 11a may have two positions of opening and closing, and the amount of backflow of the check valve assembly 11 as a whole may be controlled by both the check valve 11a and the backflow valve 11 b.

In addition, the one-way return valve assembly 11 may be integrated into a whole or may be two separate components, which is not limited herein.

The filter elements with different initial desalination rates are adjusted by putting the different mixed-winding filter elements into a water channel system, and the adjustment range is +/-10%. For example, the initial desalination rate of the two-page nanofiltration five-page reverse osmosis combined filter element is about 70%, and the desalination rate of 60% -80% can be adjusted by adjusting the one-way backflow valve assembly 11 in the system.

It can be seen that, in this embodiment, besides the mixed roll filter element 60, the arrangement of the front filter element 20 and the rear filter element 30 is also necessary, and the front filter element 20 can filter some large-particle impurities in water, so as to prevent the large-particle impurities from entering the mixed roll filter element 60, thereby causing the situation of blockage of the mixed roll filter element. The post-filter element 30 can improve the taste of water quality. It can be seen that the front filter element 20 and the rear filter element 30 also play a more important role in the overall waterway system.

As is well known, after water flow containing impurities, such as silt, rust, eggs, floating objects, grease, etc., enters a water channel system from a water source inlet 101, if the water flow directly enters the mixed roll filter element 60, the impurities also enter the mixed roll filter element 60, and once the water flow enters the mixed roll filter element 60, the impurities are difficult to be flushed away by back flushing, and are difficult to be discharged, and after a long time, the impurities gradually accumulate in the mixed roll filter element 60, which eventually causes the mixed roll filter element 60 to be blocked, and after the blockage, a user has to replace the impurities, thereby reducing the service life of the mixed roll filter element 60. Here, the primary filter element includes a front filter element 20, and the front filter element 20 includes a front PP cotton filter element 20a and a front activated carbon filter element 20 b.

The PP cotton filter element is a novel precise filter element and has the characteristics of small volume, large filter area, high precision, no pollution, convenience in installation and replacement and the like. The PP cotton filter element can effectively remove various particle impurities in the filtered liquid, such as large particle substances such as rust, silt, ova and the like in the water. In addition, the PP cotton filter element has a multi-layer depth structure, and the pollutant carrying capacity is large; the filtration flow is large, and the pressure difference is small; acid, alkali, organic solution, oil. Therefore, after the tap water is filtered by the PP cotton filter element, most of large-particle impurities in the tap water can be removed.

After being filtered by the front PP cotton filter element 20a, impurities are removed by the front active carbon filter element 20b, and the front active carbon filter element 20b integrates the functions of adsorption, filtration, interception and catalysis.

The carbon rod filter core is matched with an edible agent binder as an auxiliary material and is manufactured by a special overstock molding process; it mainly adsorbs impurities such as heterochrosis, peculiar smell, organic chemical substances and the like in water.

After being filtered by the front PP cotton filter element 20a and the front active carbon filter element 20b, only inorganic salt is basically left in the water quality. After passing through the mixed-roll filter element 60, inorganic salt in water can be desalted, and the desalted water flow passes through the post-filter element 30 to improve the taste.

The post-positioned active carbon filter element is the last process in the filter element filtration, and has the main functions of purifying water quality and improving the taste of water. The coconut shell activated carbon is mainly prepared by taking coconut shells as raw materials through a series of precision processing, the appearance visible to naked eyes is black and granular, and the activated carbon has the advantages of strong adsorption capacity, long service life, wear resistance and the like. Possess rearmounted active carbon filter core system can deep purification water among the water route system, the raw water filters layer upon layer through the water purifier, when walking rearmounted active carbon filter core, heterochrosis, the peculiar smell in the absorption water purification that can be more thorough, the taste of adjustment pure water suppresses the regeneration of bacterium in the pure water simultaneously, ensures that pure sweet is delicious.

The types of the post-activated carbon are as follows: 1. powdered Activated Carbon (PAC): powdered activated carbon is actually granular activated carbon with finer particle sizes. Because the particles are fine and have large specific surface area, the adsorption effect of the activated carbon is better than that of the commonly used granular activated carbon. 2. Granular Activated Carbon (GAC): this is commonly used activated carbon in water purifiers. The smaller the particles, the better the adsorption capacity. 3. Activated carbon fiber felt (ACF): according to the difference of raw materials, the raw materials are two types: one is to take viscose fiber filament as raw material, process into cloth, through carbonization, activation, high temperature treatment to get final product; the other is prepared by using polypropylene -based fiber as a raw material, processing the raw material into a felt, and carrying out preoxidation, carbonization, activation and high-temperature treatment. The former has an average pore diameter of 17 to 26A, and the latter has an average pore diameter of 10 to 20A. The activated carbon fiber is usually made into a felt with the thickness of 1-5 mm, and the felt has more micropores than granular activated carbon, larger specific surface area (1000-1600 m2/g), larger adsorption capacity (2-6 times higher), faster adsorption speed, good regeneration performance, high desorption speed and reusability. 4. Sintered activated carbon filter element (CTO): sintered activated carbon filter elements (CTO), also known as carbon rod filter elements, compressed activated carbon filter elements. The filter element is formed by adding a binder (such as PE resin) into granular activated carbon, heating, sintering and extruding, and the outer layer of the filter element is often coated with white polypropylene (PP) non-woven fabric. The sintered active carbon filter element has two functions of adsorption and filtration (average pore diameter is 3-20 um), but the filtration function is lower than that of a PP melt-blown filter element, and the adsorption function is lower than that of a granular active carbon filter element.

According to the technical scheme, the one-way backflow valve assembly 11 is arranged on the waterway system containing the roll mixing filter element 60, so that pure water filtered by the roll mixing filter element 60 flows back to be mixed with water flow which is not filtered, the TDS value of the inlet water is reduced, the mixed water flow enters the roll mixing filter element 60 again, and the effect of improving the whole desalination rate is achieved.

Although the one-way return valve assembly 11 only requires communication between the inlet flow path and the outlet flow path, the position of the one-way return valve assembly 11 may be selected due to the large number of nodes of the circuit formed by the front filter element 20, the mix-roll filter element 60, and the rear filter element 30.

This is discussed below:

(1) referring to fig. 22, a flow path between the water source inlet 101 and the inlet of the core 20a of the front PP cotton filter element 20a is communicated with the return water outlet; and a flow path between the pure water outlet 102 and the rear activated carbon filter element is communicated with the backflow water inlet.

In the waterway system, when a common water using system is selected, the one-way backflow valve assembly 11 is not opened, tap water enters the front PP cotton filter element 20a from a tap water pipe, is subjected to coarse filtration and adsorption through activated carbon, then enters the water pump, enters the mixed roll filter element 60 through the pressurization of the water pump, filtered wastewater is discharged through the waste water valve 13, and pure water is supplied to a user through the pure water outlet 102 through the rear filter element 30. When a user needs to use water with other water qualities, the one-way backflow valve assembly 11 in the backflow water channel is opened, tap water enters the front PP cotton filter element 20a, enters the front activated carbon filter element 20b for coarse filtration and adsorption, enters the water pump, is pressurized by the water pump, enters the roll mixing filter element 60, filtered waste water is discharged through the waste water valve 13, pure water flows through the rear filter element 30, a part of the pure water flows back to the front end of the front PP cotton filter element 20a through the opened one-way backflow valve assembly 11, the TDS value of the raw water entering the front PP cotton filter element 20a is reduced, the desalination rate of the discharged water is adjusted, and the rest of the pure water is used by the user. Wherein one-way backflow valve subassembly 11 has the state of difference promptly to the opening of different degree to and the state of opening entirely, different valve opening sizes can lead to final play water TDS to change, lead to holistic desalination change simultaneously, and its principle is that backflow valve 11b opens the aperture and is big more, and the water yield of its backward flow is higher, and the lower that will intake TDS value dilutes. Thus, when passing through the coalescing filter element 60, the TDS of the effluent is lower than that in the non-return state, e.g., when the one-way return valve assembly 11 is closed, the rejection rate of the system is 71.75%, while when the return valve 11b is opened to a flow rate of 0.5L/min, the rejection rate of the entire system is 77.08%; the salt rejection varies for different opening amounts of the reflux valve 11b as shown in the following table:

TABLE 2 table of correspondence between backflow amount of one-way backflow valve assembly 11 and salt rejection rate

Amount of reflux	Salt rejection
		0L	71.75％
0.5L/min	77.08％
		1.0L/min	80.8％
1.5L/min	83.9％

(2) Referring to fig. 23, a flow path between the water source inlet 101 and the inlet of the front PP cotton filter element 20a is communicated with the return water outlet; and a flow path between the mixing and rolling filter element and the rear activated carbon is communicated with the backflow water inlet.

When a common water using system is selected, the reflux valve 11b is not opened, tap water enters the front PP cotton filter element 20a, enters the front activated carbon filter element 20b for coarse filtration and adsorption, then enters the water pump, enters the mixed roll filter element 60 after being pressurized by the water pump, filtered wastewater is discharged through the wastewater valve 13, and pure water is supplied to a user after passing through the rear filter element 30. When a user needs to use water with other water qualities, the one-way backflow valve assembly 11 in the backflow water channel is opened, water flow of the water flow enters the front PP cotton filter element 20a as tap water, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, enters the co-coiling filter element 60 after being pressurized by the water pump, filtered waste water is discharged through the waste water valve 13, part of pure water flows back to the front end of the front PP cotton filter element 20a through the backflow valve 11b, the TDS value of the raw water entering the front PP cotton filter element 20a is reduced, the desalination rate of the discharged water is adjusted, and the rest of the pure water is filtered by the rear PP filter element 30 and then is provided for the user to use. The principle of the system is that the larger the opening aperture of the reflux valve 11b is, the higher the amount of water refluxed is, the lower the TDS value of the inlet water is, so that after passing through the mixing and rolling filter element 60, the lower the TDS value of the outlet water is compared with that in a non-reflux state, for example, when the reflux valve 11b is closed, the desalination rate of the system is 71.75%, and when the reflux valve 11b is opened to a flow rate of 1.5L/min, the desalination rate of the whole system is 83.9%; the salt rejection was varied as shown in Table 2 above.

(3) Referring to fig. 24, a flow path between the front PP cotton filter element 20a and the front activated carbon filter element 20b is communicated with the return water outlet; and a flow path between the pure water outlet 102 and the rear activated carbon filter element is communicated with the backflow water inlet.

When a common water using system is selected, the reflux valve 11b is not opened, tap water enters the front PP cotton filter element 20a, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, enters the mixed roll filter element 60 after being pressurized by the water pump, filtered wastewater is discharged through the wastewater valve 13, and pure water is supplied to a user through the rear filter element 30 and is used by the user through a water outlet. When a user needs to use water with other water qualities, the backflow valve 11b in the backflow water channel is opened, the water flow is tap water, the tap water enters the front PP cotton filter element 20a, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, is pressurized by the water pump, enters the roll-mixing filter element 60, the filtered wastewater is discharged through the wastewater valve 13, after passing through the rear filter element 30, a part of the pure water flows back to the front end of the activated carbon filter element (wherein the activated carbon filter element can be granular carbon or a carbon rod filter element) through the backflow valve 11b, the TDS value of the raw water entering the activated carbon filter element is reduced, so that the desalination rate of the effluent is adjusted, and the rest of the pure water is used by the user; the salt rejection was varied as shown in Table 2 above.

(4) Referring to fig. 25, a flow path between the front PP cotton filter element 20a and the front activated carbon filter element 20b is communicated with the return water outlet; the flow path between the mixing and rolling filter element 60 and the rear active carbon is communicated with the backflow water inlet.

When a common water using system is selected, the reflux valve 11b is not opened, tap water enters the front PP cotton filter element 20a, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, enters the mixed roll filter element after being pressurized by the water pump, filtered wastewater is discharged through the wastewater valve 13, and pure water is supplied to a user after passing through the rear filter element 30. When the user needs to use other quality of water, the backward flow valve 11b in the backward flow water route is opened, its rivers are after the leading cotton filter core 20a of PP is got into for the running water, leading active carbon filter core 20b carries out coarse filtration and adsorbs, reentry water pump, through the water pump pressure boost, get into in mixing a roll filter core 60, waste water discharges through waste water valve 13 after filtering, a part of pure water flows back to active carbon filter core front end (wherein the active carbon filter core can be particulate carbon, also can be the carbon rod filter core) through backward flow valve 11b, reduce the raw water TDS value that gets into the active carbon filter core, thereby adjust out the water desalination, all the other pure water is after rearmounted filter core 30 filters, provide the user and use. The principle of the system is that the larger the opening aperture of the return valve 11b is, the higher the backflow water quantity is, the lower the incoming water TDS value is, so that after passing through the filter element mixing, the outgoing water TDS value is lower than that in the non-backflow state, for example, when the return valve 11b is closed, the system desalination rate is 71.75%, and when the return valve 11b is opened to the flow rate of 1.5L/min, the whole system desalination rate is 83.9%; the salt rejection was varied as shown in Table 2 above.

(5) Referring to fig. 26, a flow path between the roll mixing filter element 60 and the front activated carbon filter element 20b is communicated with the return water outlet; the flow path between the rear active carbon filter element and the mixed roll filter element 60 is communicated with the backflow water inlet.

When a common water using system is selected, the reflux valve 11b is not opened, tap water enters the front PP cotton filter element 20a, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, enters the mixed roll filter element 60 after being pressurized by the water pump, filtered wastewater is discharged through the wastewater valve 13, and pure water is supplied to a user after passing through the rear filter element 30. When the user needs to use other quality of water, the backward flow valve 11b in the backward flow water route will be opened, its rivers are behind leading PP cotton filter core 20a for the running water entering, leading active carbon filter core 20b carries out coarse filtration and adsorbs, reentry water pump, through the water pump pressure boost, get into in mixing a roll filter core 60, waste water is discharged through waste water valve 13 after filtering, behind the rearmounted filter core 30, partly backward flow to the water pump front end through backward flow valve 11b, reduce the raw water TDS value that gets into the water pump, thereby adjust out the water desalination, other pure water are through using for the user. The principle of the system is that the larger the opening aperture of the backflow valve 11b is, the higher the backflow water amount is, the lower the incoming water TDS value is, so that after passing through the mixing and rolling filter element 60, the lower the outgoing water TDS value is compared with that in a non-backflow state, for example, when the backflow valve 11b is closed, the system desalination rate is 71.75%, and when the backflow valve 11b is opened to a flow rate of 1.5L/min, the whole system desalination rate is 83.9%; the salt rejection was varied as shown in Table 2 above.

(6) Referring to fig. 27, a flow path between the roll mixing filter element 60 and the front activated carbon filter element 20b is communicated with the return water outlet; the flow path between the post-positioned activated carbon filter element and the pure water outlet 102 is communicated with the backflow water inlet. When a common water using system is selected, the reflux valve 11b is not opened, tap water enters the front PP cotton filter element 20a, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, enters the mixed roll filter element 60 after being pressurized by the water pump, filtered wastewater is discharged through the wastewater valve 13, and pure water is supplied to a user after passing through the rear filter element 30. When a user needs to use water with other water qualities, the backflow valve 11b in the backflow water channel is opened, water flow of the backflow water enters the front PP cotton filter element 20a as tap water, the front activated carbon filter element 20b performs coarse filtration and adsorption, then enters the water pump, enters the co-coiling filter element 60 after being pressurized by the water pump, filtered waste water is discharged through the waste water valve 13, part of pure water flows back to the front of the water pump through the backflow valve 11b, the TDS value of the raw water entering the water pump is reduced, the desalination rate of the discharged water is adjusted, and the rest of the pure water is filtered by the rear filter element 30 and then is provided for the user to use. The principle of the system is that the larger the opening aperture of the reflux valve 11b is, the higher the amount of water refluxed is, the lower the TDS value of the inlet water is, so that after passing through the filter element mixing, the lower the TDS value of the outlet water is compared with that in a non-reflux state, for example, when the reflux valve 11b is closed, the desalination rate of the system is 71.75%, and when the reflux valve 11b is opened to the flow rate of 1.5L/min, the desalination rate of the whole system is 83.9%; the salt rejection was varied as shown in Table 2 above.

In the above embodiment, since the tap water itself has a certain water pressure, if the water source is tap water, after the tap water enters the water channel system from the water source inlet 101, under the water pressure of the tap water, the water can completely pass through the mixing and rolling filter element 60, and part of the water filtered by the mixing and rolling filter element 60 can flow back to the upstream of the mixing and rolling filter element 60 through the one-way return valve assembly 11, and join with the water that does not pass through the mixing and rolling filter element 60, and the joined water flows are mixed and then continue to enter the mixing and rolling filter element 60 for filtering.

Considering that the mixing roll filter element 60 has a large flow resistance, even if the water pressure exists, the mixing roll filter element may cause a small resistance to the tap water, and thus the water outlet rate may be affected.

In addition, the waterway system does not necessarily have a service environment of tap water, and once the water pressure of the tap water is not available, the waterway system cannot desalinate the water flow (for example, the water source is a water tank filled with water, or a low-pressure water source).

In view of this, in addition to the above embodiment, the booster pump 12 is provided in the water inlet flow path. Here, the booster pump 12 may be disposed in various positions, for example, the booster pump 12 may be disposed upstream of the mix-roll filter 60, in which case the booster pump 12 mainly supplies positive pressure to the mix-roll filter 60 to cause water to flow through the mix-roll filter 60 by the positive pressure. The booster pump 12 may also be disposed downstream of the mixing and rolling filter element 60, and in this case, the booster pump 12 mainly provides negative pressure to the mixing and rolling filter element 60, but the negative pressure may damage the mixing and rolling filter element 60 and reduce the service life of the mixing and rolling filter element 60, and therefore, in this embodiment, the preferred embodiment of the booster pump 12 is disposed upstream of the mixing and rolling filter element 60.

Based on the above embodiment, although the booster pump 12 is located upstream of the mix roll filter element 60, the specific location thereof will be discussed.

(1) And the booster pump 12 is positioned on a flow path between the water source inlet 101 and the pre-filter 20.

(2) The booster pump 12 is located in a flow path between the pre-filter 20 and the mixing filter 60.

In the case of (1), since the tap water itself has a certain water pressure (in this case, tap water is taken as an example), the flow rate of the water flow is fast, and the booster pump 12 is placed on the flow path between the water source inlet 101 and the first water inlet, which does not contribute much to the increase of the water pressure. Then, after the water flows through the front filter element 20, the water pressure is seriously reduced due to the resistance of the front filter element 20, the water flow after the water pressure is reduced enters the mixed roll filter element 60 again, the water pressure loss is more serious, and the pure water outlet rate can be seriously influenced.

In the case of (2), although the water pressure is reduced after the tap water enters the pre-filter element 20, the water pressure can be increased under the relay action of the booster pump 12, so as to reach the water pressure before the tap water enters the pre-filter element 20, and even exceed the water pressure (even if the water pressure is not higher than the previous water pressure, the water pressure is not too low), so that when the water flow enters the mixed roll filter element 60, the water flow still has higher water pressure, the water flow enters the mixed roll filter element 60 more smoothly, and the flow rate of the water flow flowing out of the pure water outlet can be ensured.

That is, the booster pump 12 is located on the flow path between the pre-filter 20 and the mixing filter 60.

The position of the booster pump 12 in cooperation with the one-way return valve assembly 11 is important to achieve the optimum return effect. Based on the above embodiment, there are two positions of the one-way return valve assembly 11 with respect to the booster pump 12, one of which is: the booster pump 12 is positioned on a flow path between the mixed roll filter element 60 and the return water outlet; alternatively, the booster pump 12 is located in the flow path between the return water outlet and the mixing and rolling filter element 60.

For the former, although the water flow filtered by the primary mixing and rolling filter element 60 and the water flow pumped by the booster pump 12 can be smoothly mixed and then enter the mixing and rolling filter element 60, because the pump pressure of the booster pump 12 is high, the water flow at the return water outlet may be limited by the pressure of the booster pump 12, so that the water flow flowing out from the return water outlet is insufficient (even directly blocked by the water pressure of the booster pump 12), thereby affecting the mixing of the two water flows and further affecting the filtering effect.

In the latter case, since both the positive pressure and the negative pressure of the booster pump 12 are relatively large, the water flow from the water source inlet 101 may enter the booster pump 12 after passing through the pre-filter 20 on the one hand, and the water flow flowing out of the return water outlet may also smoothly enter the booster pump 12 on the upstream of the booster pump 12 due to the negative pressure of the booster pump 12, thereby facilitating the mixing of the two water flows. In addition, the positive pressure of the water flow released by the booster pump 12 will cause a part of the water flow to flow back from the backflow inlet to the upstream of the booster pump 12, so as to form a water flow circulation, the backflow water flow is continuous, and the mixing effect is better.

In addition, because there is a certain flow path from the upstream of the booster pump 12 to the mixing and rolling filter element 60, in the flow path, the two water flows can be fully mixed, so that the two water flows can be mixed more uniformly, and the filtering effect is better.

In the above waterway system, whether to provide the waste water outlet 103 may be determined more as required. For example, in a region with good water quality, the impurities in the tap water are less, in such a case, the wastewater outlet 103 does not need to be arranged, the impurities filtered by the mixed rolling filter element 60 can be retained therein, and the mixed rolling filter element 60 can be replaced after the mixed rolling filter element 60 is used for a certain time.

However, in our country, in both south and north, the impurities in the tap water, such as silt, rust, floating materials, and organic matters, are relatively high, and if the wastewater outlet 103 is not provided in the waterway system, the frequency of replacing the mixed-roll filter element 60 is high. In view of this, in this embodiment, the waterway system further has a waste water outlet 103, the mixing-rolling filter element 60 has a first waste water outlet, and the waste water outlet 103 is communicated with the first waste water outlet.

In a preferred embodiment, the waste water outlet 103 is communicated with the first waste water outlet to form a waste water flow path, and a waste water valve 13 is disposed on the waste water flow path.

Here, the waste water valve 13 can be used to adjust the flow rate of the discharged waste water, so that on one hand, the internal water pressure of the mixed-rolling filter element 60 can be adjusted, and on the other hand, the flow rate of the discharged water of the mixed-rolling filter element 60 can be adjusted, that is, when the waste water valve 13 is opened, the internal water pressure of the mixed-rolling filter element 60 is reduced, the pure water discharging rate is also reduced, and when the waste water valve 13 is closed, the internal pressure of the mixed-rolling filter element 60 is increased, and the pure water discharging rate is synchronously increased. The waste valve 13 can be a solenoid valve or a waste plug.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A waterway system having a source inlet and a pure water outlet, the waterway system comprising:

the desalination filter element is arranged on a flow path from the water source inlet to the pure water outlet;

the two preposed filter elements are arranged at the upstream of the desalination filter element, and a water inlet flow path is formed between the water source inlet and the desalination filter element;

the rear filter element is arranged at the downstream of the desalination filter element, and a water outlet flow path is formed between the pure water outlet and the desalination filter element;

a one-way backflow valve assembly having a backflow water inlet and a backflow water outlet, the backflow water inlet being in communication with the water outlet flow path, the backflow water outlet being in communication with the water inlet flow path.

2. The waterway system of claim 1, wherein the desalination filter element comprises a scroll filter element or a nanofiltration filter element.

3. The waterway system of claim 2, wherein the two pre-positioned filter elements comprise a PP cotton filter element and a pre-positioned activated carbon filter element, the PP cotton filter element being positioned upstream of the pre-positioned activated carbon filter element.

4. The waterway system of claim 3, wherein the post-positioned filter element comprises a post-positioned activated carbon filter element.

5. The waterway system of claim 4, wherein a return amount of the one-way return valve assembly is adjustable.

6. The waterway system of claim 5, wherein the one-way return valve assembly includes a return valve and a one-way valve, the return valve being in series with the one-way valve.

7. The waterway system of claim 6, wherein the flow path between the water source inlet and the inlet of the PP cotton filter element is communicated with the return water outlet;

8. The waterway system of claim 6, wherein the flow path between the PP cotton filter element and the front activated carbon filter element is communicated with the return water outlet;

9. The waterway system of claim 6, wherein the flow path between the mixing roll filter element and the pre-activated carbon filter element is communicated with the return water outlet;

10. The waterway system of claim 3, further comprising a booster pump positioned in the flow path between the turning filter element and the pre-carbon filter element.

11. The waterway system of any of claims 2-10, wherein the coalescing filter element comprises at least one nanofiltration membrane and at least one reverse osmosis membrane.

12. The waterway system of claim 11, wherein the reverse osmosis membrane has a rejection rate of not less than 90% and not more than 99% and the nanofiltration membrane has a rejection rate of not more than 90%.

13. A water purifier comprising a waterway system according to any one of claims 1 to 12.