CN216426890U

CN216426890U - Waterway system and water purifier

Info

Publication number: CN216426890U
Application number: CN202122084597.0U
Authority: CN
Inventors: 谈菲; 郑跃东; 桂鹏; 廖榆敏; 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: 2022-05-03
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 desalination filter element, a primary effect filter element and a one-way backflow valve assembly, the desalination filter element is provided with a first water inlet and a first water outlet, the pure water outlet is communicated with the first water outlet and forms a water outlet flow path, the primary effect filter element comprises a preposed filter element, the preposed filter element is provided with a second water inlet and a second water outlet, the second water inlet is communicated with the water source inlet, the second water outlet is communicated with the first water inlet, a water inlet flow path is formed between the water source inlet and the first water inlet, 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. According to the technical scheme, the one-way backflow valve assembly is arranged on the waterway system containing the desalting filter element, so that the desalting rate can be adjusted.

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 the five-stage filtering technology of the water purifier used in a family is also called a PP cotton filter element (PPF), a second-stage filter element of granular activated carbon (UDF), a third-stage filter element of precise compressed activated Carbon (CTO), a fourth-stage filter element of a reverse osmosis membrane or an 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 membrane element in the current market is rolled into a plurality of single reverse osmosis membranes for rolling, or a single nanofiltration membrane is rolled into a nanofiltration filter core which is made to be more consistent with the desalination rate of the membrane.

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.

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 desalination filter element is provided with a first water inlet and a first water outlet, and the pure water outlet is communicated with the first water outlet and forms a water outlet flow path;

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

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

In an embodiment, the primary filter element further includes a rear filter element integrated with the front filter element, the rear filter element has a third water inlet and a third water outlet, and the first water outlet is communicated with the pure water outlet through the third water inlet and the third water outlet.

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

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

In one embodiment, a booster pump is disposed on the water inlet flow path.

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

In one embodiment, a flow path between the booster pump and the second water outlet is communicated with the return water outlet.

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%.

In order to achieve the above object, the present invention also provides a water purifier, comprising a waterway system having a water source inlet and a pure water outlet, the waterway system comprises a desalination filter element, a primary effect filter element and a one-way backflow valve component, the desalination filter element is provided with a first water inlet and a first water outlet, the pure water outlet is communicated with the first water outlet to form a water outlet flow path, the primary filter element comprises a front filter element, the preposed filter element is provided with a second water inlet and a second water outlet, the second water inlet is communicated with the water source inlet, the second water outlet is communicated with the first water inlet, and a water inlet flow path is formed between the water source inlet and the first water inlet, the one-way return valve assembly has a return water inlet and a return 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.

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 view of a one-way return valve assembly of the waterway system 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 a low salt rejection rate, and although mineral ions are more retained, the effluent is easy to scale, so that 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; if the salt rejection is to be reduced, the occupancy of the nanofiltration membrane may 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.

Membrane element rolling scheme as shown in fig. 1 to 21, the membrane element has a membrane sheet number including membrane sheets of two or more 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.

Adults have a low demand for mineral ions, and such people tend to be more soft (with very low mineral ion content); 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 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 wants to obtain pure water with different salt rejection rates, the user needs to select different types of filter elements 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 crowd's demands need be satisfied simultaneously, just need change the filter core of different grade type, or be equipped with multiple waterway system, 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, referring to fig. 22 to 24, the waterway system of the present invention has a water source inlet 101 and a pure water outlet 102, and includes a desalination filter element 10, a primary filter element 20, and a one-way backflow valve assembly 11. Wherein the desalination cartridge 10 has a first water inlet 10a₁And a first water outlet 10b₁The pure water outlet 102 and the first water outlet 10b₁Communicated with each other and form a water outlet flow path. The primary filter element 20 comprises a front filter element having a second water inlet 10a₂And a second water outlet 10b₂Said second water inlet 10a₂The second water outlet 10b is communicated with the water source inlet 101₂And the first water inlet 10a₁And the water source inlet 101 is communicated with the first water inlet 10a₁Forming a water inlet flow path therebetween. The one-way return valve assembly 11 has a return water inlet 111 and a return water outlet 112, the return water inlet 111 communicating with the outlet flow path, and the return water outlet 112 communicating with the inlet flow path. Wherein the desalination filter element 10 comprises a mixed-volume filter element 60 or a nanofiltration filter element. The mixing and rolling filter element 60 will be described in detail later.

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 one-way valve 11a, the one-way valve 11a may have both an opening and a closing function. When the check valve 11a is closed, the desalination rate of the water flow purified by the waterway system is 75%; when the check valve 11a is opened, the water flow purified by the waterway 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 can adjust 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 to adjust the desalination rate of the effluent. Here, the check valve 11a may be normally open, and the return amount of the entire check return valve assembly 11 may be controlled by the return valve 11 b; the check valve 11a may have two positions of opening and closing, and the amount of backflow of the entire check/backflow valve assembly 11 may be controlled by both the check valve 11a and the backflow valve 11 b.

The one-way return valve assembly 11 may be integrated into a single body, or may be two separate components, which is not limited herein.

The filter elements 60 with different mixed rolls are put into the waterway system, and the effluent desalination rate of the filter elements with different initial desalination rates is adjusted within the range of +/-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 primary filter element 20 is also necessary, and the primary filter element 20 can filter some large particle impurities in water, so as to avoid the large particle impurities from entering the mixed roll filter element 60, thereby causing the mixed roll filter element 60 to be blocked. It can be seen that the primary filter element 20 also plays an important role throughout the waterway system.

Specifically, after the water flow containing impurities, such as silt, rust, floating materials, grease, etc., enters the water channel system through the water source inlet 101, if the water flow directly enters the mixing and rolling filter element 60, the impurities also enter the mixing and rolling filter element 60, and once the impurities enter the mixing and rolling filter element 60, the impurities are difficult to discharge, and will gradually accumulate in the mixing and rolling filter element 60 over time, which will eventually lead to the mixing and rolling filter element 60 being clogged, and after the clogging, the user will replace the mixing and rolling filter element 60, thereby reducing the service life of the mixing and rolling filter element 60. Here, the primary filter element 20 includes a pre-filter element, which may be a PP cotton filter element or an activated carbon filter element.

Referring to fig. 22, in the waterway system, after entering the pre-filter, the tap water enters the booster pump 12 after being pre-pretreated and filtered, and then enters the mixed roll filter 60 after being pressurized by the booster pump 12, the filtered wastewater is discharged through the wastewater valve 13, and the pure water flows out from the pure water outlet for the user. When different desalination rates are selected, tap water enters the prepositive filter element, and after the prepositive pretreatment filtration, coarse filtration water enters the booster pump 12, the booster pump 12 is used for boosting and then enters the mixed roll filter element 60, waste water after filtration is discharged through the waste water valve 13, and pure water is divided into two flow paths, wherein one flow path is directly discharged through the pure water outlet 102 for users, and the other flow path is used for reducing and entering the raw water TDS value of the booster pump 12 and adjusting the effluent desalination rate, wherein the other flow path is used for returning to the upstream of the mixed roll filter element 60 through the one-way return valve component 11 and is mixed with the filtered water flow of the mixed roll filter element 60. 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 reflux valve 11b is opened, part of pure water flows back to the position between the preposed water outlet and the booster pump 12 and is mixed in the raw water, so that the TDS value of the raw water is reduced. The valve hole size of the return valve 11b can be adjusted, and different valve hole sizes can adjust different effluent desalination rates, 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 0.5L/min, the whole system desalination rate is 77.08%; other salt rejection changes are shown in table 2.

TABLE 2 corresponding relationship table of backflow amount and desalination rate of one-way backflow valve assembly

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

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 unfiltered water flow, 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.

In order to further improve the taste of pure water based on the above embodiments, in a preferred embodiment, please refer to fig. 23 and 24, the primary filter 20 further includes a rear filter integrated with the front filter, and the rear filter has a third water inlet 10a₃And a third water outlet 10b₃The first water outlet 10b₁Through the third water inlet10a₃The third water outlet 10b₃Is communicated with the pure water outlet 102. The function of the rear filter element is here mainly to improve the taste.

After the post-filter cartridge is added, the position of the one-way return valve assembly 11 can be selected in various ways.

This is discussed below:

(1) referring to fig. 23, the first water outlet 10b₁And the third water inlet 10a₃The flow path therebetween is communicated with the backflow inlet 111, and the second outlet 10b₂And the first water inlet 10a₁The flow path therebetween is communicated with the return water outlet 112.

In this among the water route system, the running water is intake and is got into behind the leading filter core, process leading filter core is handled and is filtered the back, and the coarse filtration water by leading delivery port flows, then gets into booster pump 12, the process booster pump 12's pressure boost, reentrant mix in rolling up the filter core 60. After filtering, the wastewater is discharged through the wastewater valve 13, and pure water flows out from the mixed roll filter element 60, then enters the rear water inlet, is subjected to rear filtering, and then flows to the pure water outlet 102 from the rear water outlet. When different desalination rates need to be selected, tap water enters behind the front filter element, passes through after the front filter element filters, the coarse filtration water by the front water outlet goes out, enters behind the front water outlet the booster pump 12, passes through the pressure boost of the booster pump 12, and then enters into in the mixed roll filter element 60. The filtered wastewater is discharged through a wastewater valve 13, and a part of pure water flows back to the front of the pump through the one-way backflow valve assembly 11, so that the TDS value of the raw water entering the booster pump 12 is reduced, and the desalination rate of the effluent is adjusted; a part of the pure water passes through the post-filter element and then flows out from the pure water outlet 102. The one-way return valve assembly 11 has various states, here closed, various degrees of opening, and fully open. When the one-way backflow valve assembly 11 is closed, the water channel is a normal filtering water channel, and the whole desalination rate of the water channel is consistent with that of the membrane element; when the one-way backflow valve assembly 11 is opened, pure water partially flows back to a position between the preposed water outlet and the booster pump 12 and is mixed in raw water, the TDS value of the raw water is reduced, the size of a valve hole of the one-way backflow valve assembly 11 can be adjusted, different water outlet desalinization rates can be adjusted according to different valve hole sizes, for example, when the backflow valve 11b is closed, the desalinization rate of the system is 71.75%, and when the backflow valve 11b is opened to the flow rate of 0.5L/min, the desalinization rate of the whole system is 77.08%; the salt rejection ratio of the different degrees of opening of the reflux valve 11b was varied as shown in the above table 2.

(2) Please refer to fig. 24, the third water outlet 10b₃A flow path between the pure water outlet 102 and the return water inlet 111, and the second water outlet 10b₂And the first water inlet 10a₁The flow path therebetween is communicated with the return water outlet 112.

This among the water route system, the running water is intake and is got into behind the leading filter core, process after leading filter core filters, the coarse filtration water gets into booster pump 12, the process the pressure boost of booster pump 12 is reentrant in mixing a roll filter core 60, waste water is discharged through waste water valve 13 after filtering, and the pure water process after the filtration of rearmounted filter core, by rearmounted delivery port flows extremely pure water outlet 102 supplies the user to use. When different desalination rates are selected, the running water is intake and is got into behind the leading filter core, process after leading filter core filters, the coarse filtration water gets into booster pump 12, the process the pressure boost of booster pump 12 gets into again in mixing a roll filter core 60, waste water is discharged through waste water valve 13 after filtering, the pure water process behind the trailing filter core, partly process one-way backward flow valve subassembly 11 flows back before the pump, reduces and gets into the raw water TDS value of booster pump 12 to adjust out the water desalination rate, all the other pure water processes pure water export 102 uses for the user. The backflow valve 11b has different states, including a closed state, an open state with different degrees, and a fully open state, when the one-way backflow valve assembly 11 is closed, the water path is a normal filtering water path, and the whole desalination rate of the water path is consistent with that of the membrane element. When the one-way backflow valve assembly 11 is opened, part of pure water flows back to a position between the preposed water outlet and the booster pump 12 and is mixed in the raw water, so that the TDS value of the raw water is reduced. The size of the valve hole of the one-way return valve assembly 11 can be adjusted, and different valve holes can adjust different effluent desalination rates, 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 0.5L/min, the whole system desalination rate is 77.08%; 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 waterway system through the water source inlet 101, the water can completely pass through the mixing and rolling filter element 60 under the water pressure of the tap water, 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, the joined water flows are mixed, and then continue to enter the mixing and rolling filter element 60 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 to 24, 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 mixing and rolling filter 60, and the booster pump 12 mainly provides positive pressure to the mixing and rolling filter 60 to allow water to flow through the mixing and rolling filter 60 by the positive pressure. The booster pump 12 may also be disposed downstream of the mixing and rolling filter element 60, in which 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, so that 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 60, the specific location thereof will be discussed.

(1) The booster pump 12 is positioned at the water source inlet 101 and the second water inlet 10a₂On the flow path therebetween.

(2) The booster pump 12 is positioned at the second water outlet 10b₂And the first water inlet 10a₁On the flow path therebetween.

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 is fast, and the booster pump 12 is placed at the water source inlet 101 and the second water inlet 10a₂The flow path therebetween does not contribute much to increase of the water pressure. Then, after the water flows through the pre-filter element, the water pressure drops seriously due to the resistance of the pre-filter element, and the water flow after the water pressure drops enters the mixed rolling filter element 60 again, so that the water pressure loss is more serious, and the water outlet rate of pure water can be seriously influenced.

As for (2), after the tap water enters the pre-filter element, although the water pressure is reduced, at this time, under the relay action of the booster pump 12, the water pressure can be increased, so that the water pressure before the tap water enters the pre-filter element is reached, even the water pressure 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 mixed rolling filter element 60, the water flow still has higher water pressure, the water flow enters the mixed rolling filter element 60 more smoothly, and the water flow rate flowing out of the pure water outlet can be ensured.

That is, the booster pump 12 is located at the second water outlet 10b₂And the first water inlet 10a₁On the flow path therebetween.

With continued reference to FIGS. 22-24, the location of the booster pump 12 and the one-way return valve assembly 11 is important to achieve optimal return flow. On the basis of 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 at the second water outlet 10b₂The return water outlet 112; alternatively, the boost pressure isThe pump 12 is positioned between the return water outlet 112 and the first water inlet 10a₁On the flow path therebetween.

In the former case, although the water flow filtered by the mixing and rolling filter element 60 and the water flow pumped by the booster pump 12 can smoothly enter the mixing and rolling filter element 60 after being mixed, since the pump pressure of the booster pump 12 is relatively high, the water flow at the return water outlet 112 may be restricted by the pressure of the booster pump 12, so that the water flow flowing out of the return water outlet 112 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.

To the latter, because the malleation and the negative pressure of booster pump 12 are all bigger the upper reaches of booster pump 12 receive the negative pressure effect of booster pump 12 comes from on the one hand the rivers of water source entry 101 pass through behind the leading filter core, can get into the booster pump 12, on the other hand by the rivers that the backward flow delivery port 112 flows also can get into smoothly the booster pump 12 to do benefit to the mixture of two strands of rivers. 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 water inlet 111 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 60, 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 set the waste water outlet 103 may be set according to the requirement. For example, in regions with good water quality, the impurities in tap water are relatively small and the mineral ions are not abundant. In this case, the waste water outlet 103 is not required, the impurities filtered by the mixed roll filter element 60 can be retained therein, and the mixed roll filter element 60 can be replaced after the mixed roll 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 materials, are relatively high, and if the waste water 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 the present embodiment, the waterway system further has a waste water outlet 103, the mixing-rolling filter element 60 has a first waste water outlet 10c, and the waste water outlet 103 is communicated with the first waste water outlet 10 c.

In a preferred embodiment, the waste water outlet 103 is communicated with the first waste water outlet 10c to form a waste water flow path, and a waste water valve 13 is disposed on the waste water flow path.

The waste water valve 13 can be used to regulate the outlet flow of waste water, so that on the one hand the internal water pressure of the mixing and rolling filter element 60 can be regulated, and on the other hand the outlet flow of the mixing and rolling filter element 60 can also be regulated. That is, when the waste water valve 13 is opened, the water pressure inside the filter element 60 is reduced, and the pure water outlet rate is also reduced; when the waste water valve 13 is closed, the pressure inside the filter element 60 rises, and the pure water outlet 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 primary filter element comprises a front filter element, the front filter element is provided with a second water inlet and a second water outlet, the second water inlet is communicated with the water source inlet, the second water outlet is communicated with the first water inlet, a water inlet flow path is formed between the water source inlet and the first water inlet, and the water inlet flow path is provided with a booster pump;

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 second outlet and the first inlet communicates with the return outlet.

6. The waterway system of claim 3, wherein the primary filter element further comprises a rear filter element integrated with the front filter element, the rear filter element having a third water inlet and a third water outlet, the first water outlet being in communication with the pure water outlet through the third water inlet and the third water outlet.

7. The waterway system of claim 6, wherein the flow path between the third water outlet and the pure water outlet is in communication with the return water inlet.

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

9. The waterway system of claim 3, wherein the booster pump is positioned in the flow path between the second water outlet and the first water inlet.

10. The waterway system of claim 9, wherein a flow path between the booster pump and the second water outlet is in communication with the return water outlet.

11. The waterway system of any of claims 2-10, wherein the desalination cartridge 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.