CN215975217U

CN215975217U - Waterway system and water purifier

Info

Publication number: CN215975217U
Application number: CN202122084998.6U
Authority: CN
Inventors: 谈菲; 孙天厚; 桂鹏; 周有福
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 purifier, wherein the waterway system is provided with a water source inlet and a pure water outlet, the waterway system comprises a preposed filter element, a desalting filter element, a postposed filter element and a one-way backflow valve assembly, the preposed filter element is provided with a first water inlet and a first water outlet, and the first water inlet is communicated with the water source inlet. The desalination filter core has second water inlet and second delivery port, and the second water inlet communicates with first delivery port, forms into water flow path between water source entry and the second water inlet. The rear filter element is provided with a third water inlet and a third water outlet, the third water inlet is communicated with the second water outlet, the third water outlet is communicated with the pure water outlet, and a water outlet flow path is formed between the pure water outlet and the second water outlet. The one-way backflow valve assembly is provided with a backflow water inlet and a backflow water outlet, the backflow water inlet is communicated with the water outlet flow path, and the backflow water outlet is communicated with the water inlet flow path. The technical scheme of the utility model ensures 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, the first stage of the five-stage filtering technology of the water purifier used in a family is also called a PP cotton filter element (PPF), the second stage is a granular activated carbon (UDF) filter element, the third stage is a precision compression activated Carbon (CTO) filter element, the fourth stage is a reverse osmosis membrane or an ultrafiltration membrane, and the fifth stage is rear 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 above object, the present invention provides a waterway system having a water source inlet and a pure water outlet, the waterway system comprising:

the pre-filter element is provided with a first water inlet and a first water outlet, and the first water inlet is communicated with the water source inlet;

the desalination filter element is provided with a second water inlet and a second water outlet, the second water inlet is communicated with the first water outlet, and a water inlet flow path is formed between the water source inlet and the second water inlet;

the rear filter element is provided with a third water inlet and a third water outlet, the third water inlet is communicated with the second water outlet, the third water outlet is communicated with the pure water outlet, and a water outlet flow path is formed between the pure water outlet and the second water outlet;

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.

In one embodiment, the desalination filter element comprises a scroll filter element or a nanofiltration 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 first water inlet communicates with the return water outlet, and a flow path between the pure water outlet and the third water outlet communicates with the return water inlet.

In one embodiment, the flow path between the water source inlet and the first water inlet is in communication with the return water outlet, and the flow path between the second water outlet and the third water inlet is in communication with the return water inlet.

In an embodiment, the flow path between the first water outlet and the second water inlet is communicated with the return water outlet, and the flow path between the second water outlet and the third water inlet is communicated with the return water inlet.

In one embodiment, the flow path between the first water outlet and the second water inlet is communicated with the return water outlet, and the flow path between the third water outlet and the pure water outlet is communicated with the return water inlet.

In an embodiment, the waterway system further includes a booster pump, and the booster pump is located on a flow path between the first water outlet and the second water inlet.

In one embodiment, the waterway system further has a wastewater outlet, and the desalination 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 desalination 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, the waterway system comprises a preposed filter element, a desalting filter element, a postposed filter element and a one-way backflow valve assembly, the preposed filter element is provided with a first water inlet and a first water outlet, and the first water inlet is communicated with the water source inlet. The desalination filter element is provided with a second water inlet and a second water outlet, the second water inlet is communicated with the first water outlet, and a water inlet flow path is formed between the water source inlet and the second water inlet. The rear filter element is provided with a third water inlet and a third water outlet, the third water inlet is communicated with the second water outlet, the third water outlet is communicated with the pure water outlet, and a water outlet flow path is formed between the pure water outlet and the second water outlet. The one-way return valve assembly has a return water inlet and a return water outlet, the return water inlet being in communication with the water outlet flow path, the return water outlet being 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 pure water filtered by the desalination filter element flows back to be mixed with water flow which is not filtered, the TDS value of the inlet water is reduced, and the mixed water flow enters the desalination filter element again, so that the effect of improving 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.

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 common water purification system is a reverse osmosis water purifier, the reverse osmosis membrane generally has a high desalination rate of 90-99%, and the nanofiltration membrane generally has a low desalination rate of 30-70%. At present, two types of membrane elements are rolled in the market, wherein one type is a multi-page single reverse osmosis membrane which is rolled into a membrane element with the desalination rate more consistent with that of the membrane; and the other is that a plurality of pages of single nanofiltration membranes are rolled into nanofiltration filter elements. 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 membranes with different desalination rates are mixed and rolled to form a mixed roll filter element, 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 desalination rate of 95% and the nanofiltration membrane desalination rate of 50% as an example, the mixed membrane desalination rate after the two are mixed and rolled is between 50% and 95%, and can be, for example, 60%, 65%, 70%, 75%, 80%, and the like. If the salt rejection rate is required to be increased, the occupancy rate of the reverse osmosis membrane can be increased; the stock entry needs to reduce the salt rejection rate, and the occupancy ratio of the nanofiltration membrane can be increased.

The structure of the mixing roll filter element 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 is different according to different membrane pages and proportions, and the desalination rate range is approximately 10-99%. Of course, when the mixed roll filter element is used by a user, the salt rejection rate is certain. 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 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 with the mixed-rolling filter element. The desalination rate of the mixed roll filter element with different proportions is 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.

As a mixed roll filter element, any one of the RO page number and NF page number schemes is difficult to meet the requirements of different crowds at the same time. If different people's demands are satisfied, need change different types of filter core, or be equipped with the multiple water route system that contains the thoughtlessly roll up filter core of different desalination, this kind of mode obviously too complicated.

Although the aforesaid mixes a roll filter core and can't satisfy the user demand, above-mentioned, mix a roll filter core and can regard as the filter assembly who adjusts the desalination, its adjustable principle for through the pure water backward flow to with do not have filterable rivers to mix to reduce into the TDS value of intaking, the rivers that mix get into once more and mix in rolling up the filter core, 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, the waterway system comprises a preposed filter element 20, a desalination filter element 10, a postpositional filter element 30 and a one-way backflow valve assembly 11, the preposed filter element 20 is provided with a first water inlet and a first water outlet, and the first water inlet is communicated with the water source inlet 101. The desalination filter element 10 has a second water inlet and a second water outlet, the second water inlet is communicated with the first water outlet, and a water inlet flow path is formed between the water source inlet 101 and the second water inlet. The rear filter element 30 has a third water inlet and a third water outlet, the third water inlet is communicated with the second water outlet, the third water outlet is communicated with the pure water outlet 102, and a water outlet flow path is formed between the pure water outlet 102 and the second water outlet. 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 cartridge 10 includes a roll-mixed filter cartridge or a nanofiltration filter cartridge.

The following embodiments will be described in detail by taking a roll-mixing filter element as an example.

In order to achieve the effect of backflow, in the present embodiment, the one-way backflow valve assembly 11 plays a key role in the process of returning the filtered pure water (filtered by the filter element) 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 element 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 may have a desalination rate higher than 75% (e.g., 78%, 80%, 82%, 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, the front filter element 20 and the rear filter element 30 are 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, thereby causing the mixed roll filter element to be blocked. 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, the running water generally contains a lot of impurities, such as silt, rust, eggs, floating objects, grease, etc., after the water flow containing these impurities enters the water channel system from the water source inlet 101, if the water flow directly enters the mixing and rolling filter element, these impurities also enter the mixing and rolling filter element, and once the water flow enters the mixing and rolling filter element, the impurities are difficult to be flushed away by back, and these impurities are difficult to be discharged, and over time, these impurities will gradually accumulate in the mixing and rolling filter element, and eventually will cause the mixing and rolling filter element to be blocked, and after the blockage, the user has to replace the mixing and rolling filter element, so that the service life of the mixing and rolling filter element is reduced. Here, the primary filter element 20 includes a pre-filter element 20, and the pre-filter element 20 may be a PP cotton filter element or an activated carbon filter element.

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 water path system containing the roll mixing filter element, so that pure water filtered by the roll mixing filter element flows back to be mixed with water flow which is not filtered, the TDS value of inlet water is reduced, the mixed water flow enters the roll mixing filter element again, and the effect of improving the whole desalination rate is achieved.

Although the one-way return valve assembly only requires communication between the inlet flow path and the outlet flow path, the position of the one-way return valve assembly 11 is selected because of the large number of nodes of the loop formed by the front filter element 20, the mixing filter element, 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 first water inlet is communicated with the return water outlet, and a flow path between the pure water outlet 102 and the third water outlet is communicated with the return water inlet.

In the waterway system, a non-backflow mode and a backflow mode exist, in the non-backflow mode, the backflow valve 11b is not opened, tap water enters the prepositive filter element 20 (prepositive composite filter element), after the pretreatment, coarsely filtered water enters the booster pump 12, after the pressurization, enters the mixed roll filter element, after the filtration, waste water is discharged through the waste water valve, and after the pure water passes the postpositive filter element 30, the pure water is discharged for users to use. When different desalination rates are required to be selected, namely, when a backflow mode is selected, tap water enters the pre-filter element 20, after pre-pretreatment, coarse filtered water enters the booster pump 12, after pressurization, the coarse filtered water enters the mixed roll filter element, after filtration, wastewater is discharged through the wastewater valve, after pure water passes through the post-filter element 30, a part of the pure water flows back to the front of the booster pump 12 (the flow path between the water source inlet 101 and the first water inlet) through the backflow valve 11b, the TDS value of raw water entering the booster pump 12 (the flow path between the water source inlet 101 and the first water inlet) is reduced, and therefore the desalination rate of the discharged water is adjusted. Wherein the reflux valve 11b has different states, closed, opened to different degrees, and fully opened, when the reflux valve 11b is closed, the water path is a normal filtering water path, and the whole desalination rate is consistent with that of the membrane element; when the return valve 11b is opened, pure water partially flows back to a position between the preposed water outlet and the booster pump 12 (a flow path between the water source inlet 101 and the first water inlet), the pure water is mixed in raw water to reduce the TDS value of the raw water, the size of a valve hole of the return valve 11b can be adjusted, different outlet water desalination rates can be adjusted by different valve hole sizes, for example, when the return valve 11b is closed, the desalination rate of the system is 71.75%, and when the return 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 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 first water outlet and the second water inlet is communicated with the return water outlet, and a flow path between the second water outlet and the third water inlet is communicated with the return water inlet.

In the waterway system, there are no backflow mode and backflow mode, under the no backflow mode, after the running water enters the prepositive filter element 20, through the prepositive pretreatment, the coarse filtration water enters the booster pump 12, after the pressure boost, enters the mixed roll filter element, the filtered waste water is discharged through the waste water valve 13, after the pure water is filtered by the back carbon, the outlet water is provided for the user to use. When different desalination rates are required to be selected, tap water enters the preposed filter element 12 (preposed composite filter element) and then is subjected to preposed pretreatment, coarse filtered water enters the booster pump 12 and is pressurized and then enters the mixed-roll filter element, waste water after filtration is discharged through the waste water valve 13, one part of pure water flows back to the front of the booster pump 12 through the backflow valve 11b (the first water outlet and the flow path between the second water inlets), the TDS value of the raw water entering the booster pump 12 (the first water outlet and the flow path between the second water inlets) is reduced, the effluent desalination rate is adjusted, and the other part of pure water is filtered through the postposition filter element 30 and then is used for users through the pure water outlet 102. Wherein the one-way return valve assembly 11 has different states, closed, open to different degrees, and fully open, when the return valve 11b is closed, the water path is a normal filtration water path, and the desalination rate of the whole water path is consistent with that of the membrane element. When the return valve 11b is opened, pure water partially flows back to a position between the preposed water outlet and the booster pump 12 (a flow path between the first water outlet and the second water inlet), and is mixed in raw water to reduce the TDS value of the raw water, the size of a valve hole of the return valve 11b can be adjusted, different outlet water desalination rates can be adjusted according to different valve hole sizes, for example, when the return valve 11b is closed, the desalination rate of the system is 71.75%, and when the return 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.

(3) Referring to fig. 24, a flow path between the water source inlet 101 and the first water inlet is communicated with the return water outlet, and a flow path between the third water outlet and the pure water outlet 102 is communicated with the return water inlet. .

In the waterway system, under the non-return mode, after entering the prepositive filter element 20, the tap water is pretreated in the prepositive way, the coarse filtered water enters the booster pump 12, after being boosted, the coarse filtered water enters the mixed roll filter element, the filtered waste water is discharged through the waste water valve, and the pure water is used by a user after passing through the postpositive filter element 30. When different desalination rates are required to be selected, tap water enters the front-mounted filter element 20 (front-mounted composite filter element), after the pre-processing, coarse filter water enters the booster pump 12, after the boosting, the coarse filter water enters the mixed roll filter element, after the filtering, waste water is discharged through the waste water valve, after the pure water passes through the rear-mounted filter element 30, a part of the pure water flows back to the front-mounted filter element 20 through the backflow valve 11b, the TDS value of the raw water entering the front-mounted filter element 20 is reduced, the desalination rate of the outlet water is adjusted, and the rest of the pure water is used by a user through the pure water outlet 102. Wherein the backflow valve 11b has different states, close, open to different degrees, and fully open, when the backflow valve 11b is closed, the water channel is a normal filtering water channel, the whole desalination rate of the water channel is consistent with that of the membrane element, when the backflow valve 11b is opened, pure water partially flows back to between the preposed water outlet and the booster pump 12 (the flow channel between the water source inlet 101 and the first water inlet), the pure water is mixed in raw water, the TDS value of the raw water is reduced, the size of the valve hole of the backflow valve 11b can be adjusted, different valve hole sizes can adjust different effluent desalination rates, for example, when the backflow valve 11b is closed, the desalination rate of the system is 71.75%, and when the backflow 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.

(4) Referring to fig. 25, a flow path between the first water outlet and the second water inlet is communicated with the return water outlet, and a flow path between the second water outlet and the third water inlet is communicated with the return water inlet.

In the waterway system, under the non-return mode, after entering the prepositive filter element 20, the tap water is pretreated in the prepositive way, the coarse filtered water enters the booster pump 12, after being boosted, the coarse filtered water enters the mixed roll filter element, the filtered waste water is discharged through the waste water valve 13, and after being filtered by the postpositive filter element 30, the pure water is discharged for the user to use. When different desalination rates are required to be selected, tap water enters the preposed 20 filter element and then is subjected to preposed pretreatment, coarse filtered water enters the booster pump 12 and enters the mixed-rolling filter element after being boosted, filtered wastewater is discharged through the wastewater valve 13, one part of pure water flows back to the preposed 20 filter element (preposed composite filter element) through the backflow valve 11b and then is positioned in front of the preposed 20 filter element (the flow path between the first water outlet and the second water inlet), the TDS value of the raw water entering the preposed 20 filter element (the flow path between the first water outlet and the second water inlet) is reduced, so that the effluent desalination rate is adjusted, and the other part of pure water is filtered by the postposition 30 filter element and then is used by a user. When the return valve 11b is opened, pure water partially flows back to a position between the preposed water outlet and the booster pump 12 (a flow path between the first water outlet and the second water inlet) and is mixed in raw water, the TDS value of the raw water is reduced, the size of a valve hole of the return valve 11b can be adjusted, different outlet water desalination rates can be adjusted by different valve hole sizes, for example, when the return valve 11b is closed, the desalination rate of the system 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.

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 flow can completely pass through the mixing and rolling filter element, and part of the water flow filtered by the mixing and rolling filter element can flow back to the upstream of the mixing and rolling filter element through the one-way backflow valve assembly 11, and join with the water flow that does not pass through the mixing and rolling filter element, the joined water flows are mixed, and then continue to enter the mixing and rolling filter element for filtering.

Considering that the roll-mixing filter element has large water flow resistance, even in the presence of tap water pressure, the roll-mixing filter element can cause no small resistance to tap water, so that the water outlet rate can be influenced.

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, referring to fig. 22-25, in addition to the above embodiment, the booster pump 12 is disposed on 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, and the booster pump 12 mainly provides positive pressure to the mix-roll filter, so that water flows through the mix-roll filter by the positive pressure. The booster pump 12 may also be disposed downstream of the mixing and rolling filter element, and in this case, the booster pump 12 mainly provides a negative pressure to the mixing and rolling filter element, but the negative pressure may damage the mixing and rolling filter element and reduce the service life of the mixing and rolling filter element, and therefore, in this embodiment, the preferred embodiment of the booster pump 12 is disposed upstream of the mixing and rolling filter element.

Based on the above embodiment, although the booster pump 12 is located upstream of the mix roll filter element, its specific location needs to be discussed.

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

(2) And the booster pump 12 is positioned on a flow path between the first water outlet and the second water inlet.

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 rivers pass through leading filter core 20, receive the filterable resistance of leading filter core 20, the water pressure decline is serious, and the rivers after the water pressure decline get into again mix the book filter core, and water pressure loss is more serious to probably seriously influence pure water outlet rate.

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 that the water pressure before the tap water enters the pre-filter element 20 is achieved, and even exceeds the water pressure (even if the water pressure is not higher than the previous water pressure, the water pressure cannot be too low), so that when the water flow enters the roll-mixing filter element, the water flow still has higher water pressure, the water flow enters the roll-mixing filter element more smoothly, and the flow rate of the water flow flowing out from the pure water outlet can be ensured.

That is, the booster pump 12 is located on a flow path between the first water outlet and the second water inlet.

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 first water outlet and the return water outlet; alternatively, the booster pump 12 is located on a flow path between the return water outlet and the second water inlet.

For the former, although the water flow filtered by the primary mixing and rolling filter element and the water flow pumped by the booster pump 12 can be smoothly mixed and then enter the mixing and rolling filter element, 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 the upstream of the booster pump 12 has a certain flow path stroke to the mixing and rolling filter element, in the flow path stroke, 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, for areas with good water quality, the impurities in 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 can be retained in the mixed rolling filter element, and the mixed rolling filter element is replaced after the mixed rolling filter element 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, organic matters, are relatively high in content, and if the waste water outlet 103 is not arranged in the waterway system, the frequency of replacing the mixed-roll filter element is high. In view of this, in this embodiment, the waterway system further has a waste water outlet 103, and the roll-mixing filter element 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 can be used for adjusting waste water outlet flow to on the one hand can adjust the inside water pressure of mixing a roll filter core, on the other hand can also adjust to the outlet flow who mixes a roll filter core, and that is to say when waste water valve 13 is opened, the inside water pressure of mixing a roll filter core can reduce, and its pure water outlet rate also can reduce, and when the waste water valve was closed, mixed roll filter core internal pressure rose, and its pure water outlet rate promotes in step. 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:

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 1, wherein a return amount of the one-way return valve assembly is adjustable.

4. The waterway system of claim 3, 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.

5. The waterway system of claim 3, wherein the flow path between the source water inlet and the first water inlet communicates with the return water outlet, and the flow path between the pure water outlet and the third water outlet communicates with the return water inlet.

6. The waterway system of claim 3, wherein the flow path between the source water inlet and the first water inlet communicates with the return water outlet, and the flow path between the second water outlet and the third water inlet communicates with the return water inlet.

7. The waterway system of claim 3, wherein the flow path between the first water outlet and the second water inlet is in communication with the return water outlet, and the flow path between the second water outlet and the third water inlet is in communication with the return water inlet.

8. The waterway system of claim 3, wherein the flow path between the first water outlet and the second water inlet communicates with the return water outlet, and the flow path between the third water outlet and the pure water outlet communicates with the return water inlet.

9. The waterway system of any one of claims 1-8, further comprising a booster pump positioned in the flow path between the first water outlet and the second water inlet.

10. The waterway system of any of claims 2-8, wherein the desalination cartridge comprises at least one nanofiltration membrane and at least one reverse osmosis membrane.

11. The waterway system of claim 10, 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%.

12. A water purifier comprising a waterway system according to any one of claims 1 to 11.