CN114275852A

CN114275852A - Waterway system

Info

Publication number: CN114275852A
Application number: CN202111649770.5A
Authority: CN
Inventors: 宾倩韵; 谈菲; 刘梦薇; 孙天厚
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: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-04-05

Abstract

The invention discloses a waterway system, which can lead wastewater to flow back to a first reverse osmosis filter element through a pipeline, be mixed with tap water and then enter the first reverse osmosis filter element again for secondary filtration. Thereby greatly reducing the discharge of waste water; meanwhile, the waste water is connected with a domestic faucet, when the drinking faucet is opened, the waste water is discharged, and the waste water is recycled, so that the requirements of ecological environment protection are met.

Description

Waterway system

Technical Field

The invention relates to the technical field of water purification, in particular to a waterway system.

Background

By the reverse osmosis process, water can be passed from a solution with a high concentration to a solution with a low concentration. Since inorganic ions, colloidal substances and macromolecular solutes cannot pass through the reverse osmosis cartridge, unwanted substances remain at the end of the high concentration solution and the lower concentration end of the solution receives purified pure water during this process. The core component reverse osmosis filter element of the water path system in the water purifier, the working process of the reverse osmosis filter element is actually a liquid concentration process, the salt content in water is continuously increased along with the water flowing through the surface of the reverse osmosis filter element, and the osmotic pressure of the water is also continuously increased. When the osmotic pressure increases to the pressure of the booster pump, water cannot flow into the clean water side through the reverse osmosis cartridge. The part of the water which fails to pass is the waste water generated in the process of making water.

The lower the amount of wastewater, the higher the recovery rate (water yield/total water intake 100%), the more easily colloids, organic pollutants and scale-forming ions are deposited on the surface of the reverse osmosis filter element, which causes the blockage of the reverse osmosis filter element, and the reduction of the water yield and the desalination rate. Therefore, in order to ensure the performance of the reverse osmosis filter element and prolong the service life of the reverse osmosis filter element, the recovery rate of the reverse osmosis system on the market is generally 50-60%. But the recovery rate is not high, so that the waste water is excessive, and the resource utilization is not facilitated.

Disclosure of Invention

The invention mainly aims to provide a waterway system, and aims to solve the problem that the waterway system in the existing waterway system generates excessive waste water.

In order to achieve the above object, the present invention provides a waterway system, including:

the first reverse osmosis filter element is provided with a first water inlet, a first water outlet and a first waste water outlet;

the booster pump is provided with a pump inlet and a pump outlet, the pump inlet is communicated with a water source, the pump outlet is communicated with the first water inlet, and the first wastewater port is communicated with the pump inlet through a first branch;

the water outlet component is provided with a water outlet, a drinking water inlet and a domestic water inlet; the drinking water inlet is communicated with the first water outlet, and the domestic water inlet is communicated with the first wastewater outlet;

the first check valve is arranged on the first branch, and the flow direction of the first check valve flows from the first waste water port to the pump inlet;

the first flow limiting valve is arranged on the first branch, and has a flow limiting state and a full-open state;

the water outlet assembly is electrically connected with the booster pump and the first flow limiting valve, when the drinking water inlet is communicated with the water outlet, the booster pump is started, and the first flow limiting valve keeps a flow limiting state;

when the domestic water inlet is communicated with the water outlet, the first flow limiting valve is in a fully open state.

In an embodiment, the waterway system further includes a second reverse osmosis filter element disposed on the first branch, the second reverse osmosis filter element having a second water inlet, a second water outlet and a second waste water inlet, the second water inlet being communicated with the first waste water inlet, the second waste water outlet being communicated with the domestic water inlet, and the second water outlet being communicated with the drinking water inlet.

In an embodiment, the water supply device further comprises a second reverse osmosis filter element, the second reverse osmosis filter element is provided with a second water inlet, a second water outlet and a second waste water inlet, the second water inlet is communicated with the pump outlet, the second waste water outlet is communicated with the pump inlet through a second branch, a second flow limiting valve and a second one-way valve are arranged on the second branch, the flow direction of the second one-way valve flows from the second waste water outlet to the pump inlet, the second flow limiting valve has a flow limiting state and a full-open state, the second water outlet is communicated with the drinking water inlet, and the water outlet assembly is electrically connected with the second flow limiting valve;

when the drinking water inlet is communicated with the water outlet, the second flow limiting valve keeps a flow limiting state.

In one embodiment, when the domestic water inlet is communicated with the water outlet, the second flow limiting valve is opened in a fully open state.

In an embodiment, the waterway system further includes a pre-filter disposed upstream of the booster pump, and the water outlet end of the first check valve is communicated with the pump inlet.

In one embodiment, a water inlet valve is arranged between the upstream of the pre-filter element or the intersection of the flow path where the pump inlet is positioned and the first branch path and the pre-filter element.

In one embodiment, the waterway system further includes a post-filter disposed in a flow path between the first reverse osmosis filter and the potable water inlet.

In one embodiment, the pre-filter element is a PP filter element, an activated carbon filter element, an ultrafiltration filter element or a nanofiltration filter element; the post-positioned filter element is an activated carbon filter element.

In one embodiment, the water outlet flow rate of the preposed filter element is less than 8L/min.

The invention provides a reverse osmosis zero-wastewater system matched with an intelligent double-faucet, which is characterized in that wastewater flows back to a first reverse osmosis filter element through a pipeline, is mixed with tap water and then enters the first reverse osmosis filter element again for secondary filtration. The method can greatly reduce the discharge of waste water while ensuring the performance and the service life of the first reverse osmosis filter element; meanwhile, the waste water is connected with a domestic faucet, when the drinking faucet is opened, the waste water is discharged, and the waste water is recycled, so that the requirements of ecological environment protection are met.

When a user opens the domestic faucet, tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the first reverse osmosis filter element, so that the problem of first cup of water is effectively solved; and because the domestic water flow is large, when passing through the first reverse osmosis filter element, pollutants such as scale and organic matters deposited on the side surface of the wastewater of the first reverse osmosis filter element can be washed away, the scaling risk of the first reverse osmosis filter element is reduced, and the service life of the first reverse osmosis filter element is prolonged; meanwhile, the first branch and the first flow limiting valve can be flushed in the process, the risk of blockage of the first flow limiting valve due to scaling is reduced, and the service life of the first reverse osmosis filter element is further prolonged; when the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

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 flow diagram of a first embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 2 is a schematic flow diagram of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to a second embodiment of the present application;

FIG. 3 is a schematic flow diagram of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to a third embodiment of the present application;

FIG. 4 is a schematic flow diagram of a fourth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 5 is a schematic flow diagram of a fifth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 6 is a schematic flow diagram of a sixth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 7 is a schematic flow diagram of a seventh embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 8 is a schematic flow diagram of an eighth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 9 is a schematic flow diagram of a ninth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 10 is a schematic flow diagram of a tenth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 11 is a schematic flow diagram of an eleventh embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application;

FIG. 12 is a schematic flow diagram of a twelfth embodiment of a reverse osmosis wastewater return waterway system with an intelligent outlet assembly according to the present application.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				11a	First reverse osmosis filter element	111	First water inlet
112	The first water outlet	113	First waste water port
				11b	Second reverse osmosis filter element	114	Second water inlet
115	Second water outlet	116	Second waste water port
				12	Booster pump	121	Pump inlet
122	Pump outlet	P₁	First branch
				P₂	Second branch	14a	First flow limiting valve
14b	Second flow limiting valve	15a	First check valve
				15b	Second check valve	13	Water outlet assembly
131	Drinking water inlet	132	Water inlet for domestic water
				133	Water outlet	17a	Front filter element
17b	Rear filter element

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, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. 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 invention provides a waterway system

This waterway system includes: the reverse osmosis water purifier comprises a first reverse osmosis filter element 11a, a booster pump 12, a water outlet assembly 13, a first check valve 15a and a first flow limiting valve 14 a. The first reverse osmosis filter element 11a has a first water inlet 111, a first water outlet 112 and a first waste water outlet 113; the booster pump 12 has a pump inlet 121 and a pump outlet 122, the pump inlet 121 is for communicating with a water source, the pump outlet 122 is in communication with the first water inlet 111, and the first waste water inlet 113 is through a first branch P₁Communicates with the pump inlet 121; the water outlet assembly 13 is provided with a water outlet 133, a drinking water inlet 131 and a domestic water inlet 132, the drinking water inlet 131 and the water outlet 133 can be communicated and separated, and the domestic water inlet 132 and the water outlet 133 can be communicated and separated; the drinking water inlet 131 is communicated with the first water outlet 112, and the domestic water inlet 132 is communicated with the first waste water inlet 113; the first check valve 15a is disposed in the first branch P₁The flow direction of the first check valve 15a flows from the first waste water port 113 to the pump inlet 121; the first flow limiting valve 14a is disposed in the first branch P₁The first flow restriction valve 14a has a flow restriction state (in the flow restriction state, the flow rate is small, and the flow rate may be 5% to 80% in a fully open state, and preferably, the flow rate may be 10% to 30% in the fully open state) and a fully open state.

Wherein, the water outlet assembly 13 is electrically connected with the booster pump 12 and the first flow limiting valve 14a, when the drinking water inlet 131 is communicated with the water outlet 133, the booster pump 12 is started, and the first flow limiting valve 14a keeps a flow limiting state; when the domestic water inlet 132 and the drain port 133 are communicated, the first flow restriction valve 14a is opened in a fully open state. Where the booster pump 12 remains de-energized, it may also be in an on state.

The invention provides a reverse osmosis zero-wastewater system matched with an intelligent double-faucet. And the wastewater generated by the first reverse osmosis filter element 11a in the water purification process flows back to the front of the first reverse osmosis filter element 11a through a pipeline, is mixed with tap water and then enters the first reverse osmosis filter element 11a again for secondary filtration. Please refer to table one, after the waterway system continuously operates for 15min, the TDS of the effluent is no longer significantly increased (the TDS of the raw water is 140ppm), and after the waterway system continuously operates for 30min, the TDS of the effluent is 46ppm, which still meets the drinking water standard.

Table-wastewater recirculation system operating data

Besides the wastewater of the first reverse osmosis filter element 11a flows back to the front of the first reverse osmosis filter element 11a through the return line, the system also connects the wastewater of the first reverse osmosis filter element 11a with a domestic faucet, the domestic faucet is opened by a user to complete the flushing of the first reverse osmosis filter element 11a and the wastewater return line, the wastewater is discharged for the life of the user, the secondary utilization of the wastewater is completed, and the requirement of ecological environmental protection is met.

The first embodiment is as follows: please refer to fig. 1. The intelligent double-water faucet is added into the wastewater backflow system, and the intelligent faucet can complete electric control on other components in the system through the change of the opening/closing state of the intelligent faucet.

In this embodiment, the water circuit system includes a first reverse osmosis filter cartridge 11a, a booster pump 12, an outlet assembly 13, a first check valve 15a, and a first flow restriction valve 14 a. The first reverse osmosis filter element 11a has a first water inlet 111, a first water outlet 112 and a first waste water outlet 113; the booster pump 12 has a pump inlet 121 and a pump outlet 122, the pump inlet 121 is for communicating with a water source, the pump outlet 122 is in communication with the first water inlet 111, and the first waste water inlet 113 is through a first branch P₁Communicates with the pump inlet 121; the water outlet assembly 13 is provided with a water outlet 133, a drinking water inlet 131 and a domestic water inlet 132, the drinking water inlet 131 and the water outlet 133 can be communicated and separated, and the domestic water inlet 132 and the water outlet 133 can be communicated and separated; the drinking water inlet 131 is communicated with the first water outlet 112, and the domestic water inlet 132 is communicated with the first waste water inlet 113; the first check valve 15a is disposed in the first branch P₁The flow direction of the first check valve 15a flows from the first waste water port 113 to the pump inlet 121; the first flow limiting valve 14a is disposed in the first branch P₁The first restriction valve 14a has a restricted state and a fully open state.

Wherein, the water outlet assembly 13 is electrically connected with the booster pump 12 and the first flow limiting valve 14a, when the drinking water inlet 131 is communicated with the water outlet 133, the booster pump 12 is started, and the first flow limiting valve 14a keeps a flow limiting state; when the domestic water inlet 132 and the drain 133 are communicated, the booster pump 12 is maintained in the deenergized state, and the first flow restriction valve 14a is opened in the fully opened state.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; after tap water flows into the first reverse osmosis filter element 11a, the tap water is divided into a path of pure water and a path of wastewater, the pure water is discharged by a drinking water faucet for drinking, the wastewater is mixed with the tap water before flowing back to the booster pump 12 through the first flow limiting valve 14a and then enters the first reverse osmosis filter element 11a again for filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 (the pump is not started), then flows out of the first waste water outlet 113 in two ways, flows back to the booster pump 12 through the first flow limiting valve 14a in one way, is mixed with the tap water and then passes through the first reverse osmosis filter element 11a again, and the first branch P can be formed because the first flow limiting valve 14a is in an open state and has a large flow rate₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the living water faucet, the flushing program of the system is started, tap water with lower ion concentration can replace the wastewater with high ion concentration accumulated at the wastewater side of the first reverse osmosis filter element 11a, and the problem of the first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a, the water can flush out pollutants such as scale and organic matters deposited on the side surface of the wastewater of the first reverse osmosis filter element 11a, so that the scaling risk of the first reverse osmosis filter element 11a is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged; at the same timeThe process can be applied to the first branch P₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example two: please refer to fig. 2. In this embodiment, a front filter element 17a is added to the front end of the booster pump 12, the type of the front filter element 17a may be PP with different forms, activated carbon with different forms, ultrafiltration, nanofiltration, or a composite filter element of the above materials, and the water flow rate of the front filter element 17a is less than 8L/min.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is roughly filtered by the preposed filter element 17a and then flows into the first reverse osmosis filter element 11a, and then is divided into a path of pure water and a path of waste water, the pure water is discharged by a drinking water faucet for drinking, the waste water flows back to the front of the booster pump 12 through the first flow limiting valve 14a and is mixed with the water discharged by the preposed filter element 17a to enter the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the waste water is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 (the pump is not started), then flows out of the first waste water outlet 113 in two ways, flows back to the booster pump 12 through the first flow limiting valve 14a in one way, is mixed with the tap water and then passes through the first reverse osmosis filter element 11a again, and the first branch P can be formed because the first flow limiting valve 14a is in an open state and has a large flow rate₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when the user turns on the living water tap, the flushing program of the system is started, and the tap water with lower ion concentration can replace the ions accumulated at the waste water side of the first reverse osmosis filter element 11aThe problem of the first cup of water is effectively solved by the high-concentration wastewater; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a, the water can flush out pollutants such as scale and organic matters deposited on the side surface of the wastewater of the first reverse osmosis filter element 11a, so that the scaling risk of the first reverse osmosis filter element 11a is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged; while the process can be applied to the first branch P₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example three: please refer to fig. 3. In this embodiment, on the basis of the first embodiment, a post-filter element 17b is added to the pure water outlet pipe of the first reverse osmosis filter element 11a, and the type of the post-filter element 17b can be activated carbon with different forms.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is divided into a path of pure water and a path of waste water after flowing into the first reverse osmosis filter element 11a, the pure water is discharged by a drinking water faucet for drinking after passing through the post-positioned filter element 17b, and the waste water is mixed with the tap water before flowing back to the booster pump 12 through the first flow limiting valve 14a and then enters the first reverse osmosis filter element 11a again for filtration, so that zero discharge of the waste water is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 (the pump is not started), then flows out of the first waste water outlet 113 in two ways, flows back to the booster pump 12 through the first flow limiting valve 14a in one way, is mixed with the tap water and then passes through the first reverse osmosis filter element 11a again, and the first branch P can be formed because the first flow limiting valve 14a is in an open state and has a large flow rate₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged. The other path is directly discharged through a domestic tap for domestic water, and part of the residual raw waste in the system is usedThe water is also discharged through the life tap. Namely, when a user opens the living water faucet, the flushing program of the system is started, tap water with lower ion concentration can replace the wastewater with high ion concentration accumulated at the wastewater side of the first reverse osmosis filter element 11a, and the problem of the first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a, the water can flush out pollutants such as scale and organic matters deposited on the side surface of the wastewater of the first reverse osmosis filter element 11a, so that the scaling risk of the first reverse osmosis filter element 11a is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged; while the process can be applied to the first branch P₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example four: please refer to fig. 4. In the embodiment, on the basis of the first embodiment, a front filter element 17a is added at the front end of the booster pump 12, and a rear filter element 17b is added on a pure water outlet pipeline of the first reverse osmosis filter element 11 a; the type of the preposed filter element 17a can be PP with different forms, active carbon with different forms, ultrafiltration, nanofiltration, composite filter elements made of the materials and the like, and the water outlet flow of the preposed filter element 17a is less than 8L/min; the kind of the post-filter 17b may be activated carbon of different forms.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is coarsely filtered by the front filter element 17a and then flows into the first reverse osmosis filter element 11a, and then is divided into a path of pure water and a path of wastewater, the pure water is discharged by a drinking water faucet for drinking after passing through the rear filter element 17b, and the wastewater flows back to the front of the booster pump 12 through the first flow limiting valve 14a and is mixed with the water discharged by the front filter element 17a to enter the first reverse osmosis filter element 11a again for secondary filtration, so that zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, and tap water enters the first reverse osmosis filter element through the booster pump 12 (the pump is not started)11a, then flows out from the first waste water outlet 113 in two paths, one path flows back to the booster pump 12 through the first flow limiting valve 14a, is mixed with tap water and flows through the first reverse osmosis filter element 11a again, and the first branch P can be formed because the first flow limiting valve 14a is in an open state and has larger flow rate₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the living water faucet, the flushing program of the system is started, tap water with lower ion concentration can replace the wastewater with high ion concentration accumulated at the wastewater side of the first reverse osmosis filter element 11a, and the problem of the first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a, the water can flush out pollutants such as scale and organic matters deposited on the side surface of the wastewater of the first reverse osmosis filter element 11a, so that the scaling risk of the first reverse osmosis filter element 11a is reduced, and the service life of the first reverse osmosis filter element 11a is prolonged; while the process can be applied to the first branch P₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the first reverse osmosis filter element 11a is further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example five: please refer to fig. 5. In this embodiment, a second reverse osmosis filter element 11b is added on the basis of the first embodiment. The second reverse osmosis filter element 11b is arranged on the first branch P₁In addition, the second reverse osmosis cartridge 11b has a second water inlet 114, a second water outlet 115 and a second waste water inlet 116, the second water inlet 114 is communicated with the first waste water inlet 113, the second waste water inlet 116 is communicated with the domestic water inlet 132, and the second water outlet 115 is communicated with the drinking water inlet 131.

The first waste water inlet 113 is connected with the second water inlet 114, the second reverse osmosis filter element 11b performs secondary filtration on the waste water of the first reverse osmosis filter element 11a, and the waste water is mixed with tap water before returning to the booster pump 12 through the first flow limiting valve 14a and enters the first reverse osmosis filter element 11a again for secondary filtration.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water flows into the first reverse osmosis filter element 11a, and then is divided into a path of pure water and a path of wastewater, the pure water flows to the drinking water inlet 131, the wastewater flows into the second reverse osmosis filter element 11b and is divided into a path of pure water and a path of wastewater after secondary filtration, the pure water flows to the drinking water inlet 131 and is converged with water flow from the first water outlet 112, the pure water is discharged through the drinking water faucet for drinking, the wastewater is mixed with the tap water before flowing back to the booster pump 12 through the first flow limiting valve 14a and then enters the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 and then flows out from the wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out from the wastewater side of the second reverse osmosis filter element 11b in two paths, one path of tap water is mixed with the tap water and then enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again before flowing back to the booster pump 12 through the first flow limiting valve 14a, and the first reverse osmosis filter element 14a is in an open state, so that the flow rate is high, and the first branch P can be treated₁The first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; the other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the domestic faucet, a flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁And a firstOne of the restriction valves 14a is flushed, reducing the risk of blockage of the first restriction valve 14a due to scaling, further extending the life of both reverse osmosis filter elements. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example six: please refer to fig. 6. In this embodiment, a front filter element 17a is added to the front end of the booster pump 12, the type of the front filter element 17a may be PP with different forms, activated carbon with different forms, ultrafiltration, nanofiltration, or a composite filter element of the above materials, and the water outlet flow rate of the front filter element 17a is less than 8L/min.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water flows into the first reverse osmosis filter element 11a after being roughly filtered by the front filter element 17a, is divided into one path of pure water and one path of wastewater, the pure water flows to the drinking water inlet 131, the wastewater flows into the second reverse osmosis filter element 11b and is divided into one path of pure water and one path of wastewater after being secondarily filtered, the pure water flows to the drinking water inlet 131 and is converged with water flow from the first water outlet 112, the pure water is discharged for drinking through the drinking water faucet, the wastewater flows back to the front of the booster pump 12 through the first flow limiting valve 14a and is mixed with the water discharged from the front filter element 17a to enter the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 and then flows out from the wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out from the wastewater side of the second reverse osmosis filter element 11b in two paths, one path of tap water is mixed with the tap water and then enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again before flowing back to the booster pump 12 through the first flow limiting valve 14a, and the first reverse osmosis filter element 14a is in an open state, so that the flow rate is high, and the first branch P can be treated₁The first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; the other path is directly discharged through a life tap for supplying lifeWhen the running water is used, part of the original waste water remained in the system is discharged through the domestic faucet. Namely, when a user opens the domestic faucet, a flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example seven: please refer to fig. 7. In this embodiment, on the basis of the fifth embodiment, a post-filter element 17b is added to the pure water outlet pipes of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the type of the post-filter element 17b may be different forms of activated carbon.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water flows into the first reverse osmosis filter element 11a, and then is divided into a path of pure water and a path of wastewater, the pure water flows to the drinking water inlet 131, the wastewater flows into the second reverse osmosis filter element 11b and is divided into a path of pure water and a path of wastewater after secondary filtration, the pure water flows to the drinking water inlet 131 and is converged with water flow from the first water outlet 112, the pure water is discharged by a drinking water faucet for drinking after passing through the post-positioned filter element 17b, the wastewater is mixed with the tap water before flowing back to the booster pump 12 through the first flow limiting valve 14a and then enters the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, and tap water is introduced through the booster pump 12The first reverse osmosis filter element 11a flows out from the waste water side of the first reverse osmosis filter element 11a, the first reverse osmosis filter element enters the second reverse osmosis filter element 11b and then flows out from the waste water side of the second reverse osmosis filter element 11b in two paths, one path of the waste water flows back to the booster pump 12 through the first flow limiting valve 14a and then is mixed with tap water to enter the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again, and the first flow limiting valve 14a is in an open state, so that the flow is large, and the first branch P can be treated₁The first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; the other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the domestic faucet, a flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁And the first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example eight: please refer to fig. 8. In the embodiment, on the basis of the fifth embodiment, a front filter element 17a is added at the front end of the booster pump 12, and a rear filter element 17b is added on a pure water outlet pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11 b; the type of the preposed filter element 17a can be PP with different forms, active carbon with different forms, ultrafiltration, nanofiltration, composite filter elements made of the materials and the like, and the water outlet flow of the preposed filter element 17a is less than 8L/min; the kind of the post-filter 17b may be activated carbon of different forms.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is roughly filtered by the front filter element 17a and then flows into the first reverse osmosis filter element 11a, and then is divided into one path of pure water and one path of wastewater, the pure water flows to the drinking water inlet 131, the wastewater flows into the second reverse osmosis filter element 11b and is divided into one path of pure water and one path of wastewater after secondary filtration, the pure water flows to the drinking water inlet 131 and is converged with water flow from the first water outlet 112, the pure water is discharged by a drinking water faucet for drinking after passing through the rear filter element 17b, the wastewater flows back to the booster pump 12 through the first flow limiting valve 14a and then is mixed with the water discharged from the front filter element 17a and enters the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first constrictor valve 14a is opened; at this time, the first reverse osmosis filter element 11a does not produce pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 and then flows out from the wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out from the wastewater side of the second reverse osmosis filter element 11b in two paths, one path of tap water is mixed with the tap water and then enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again before flowing back to the booster pump 12 through the first flow limiting valve 14a, and the first reverse osmosis filter element 14a is in an open state, so that the flow rate is high, and the first branch P can be treated₁The first flow limiting valve 14a is flushed, so that the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; the other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the domestic faucet, a flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of first cup of water is effectively solved; moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁And the first flow-limiting valve 14aAnd the first flow limiting valve 14a is flushed, so that the risk of blockage caused by scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example nine: please refer to fig. 9. In this embodiment, a second reverse osmosis filter element 11b is added on the basis of the first embodiment, and is connected with the first reverse osmosis filter element 11a in parallel. The second reverse osmosis filter element 11b has a second water inlet 114, a second water outlet 115 and a second waste water outlet 116, the second water inlet 114 is communicated with the pump outlet 122, the second waste water outlet 116 passes through a second branch P₂In communication with the pump inlet 121, a second branch P₂A second flow limiting valve 14b and a second one-way valve 15b are arranged on the water outlet assembly, the flow direction of the second one-way valve 15b flows from the second waste water inlet 116 to the pump inlet 121, the second flow limiting valve 14b has a flow limiting state and a full open state, the second water outlet 115 is communicated with the drinking water inlet 131, and the water outlet assembly 13 is electrically connected with the second flow limiting valve 14 b. When the drinking water inlet 131 and the water outlet 133 are communicated, the second flow restriction valve 14b maintains a flow restriction state; when the domestic water inlet 132 and the drain port 133 are communicated, the second flow restriction valve 14b is opened in a fully open state.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; running water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, is converged after being filtered, and is discharged from a drinking water faucet for drinking; the wastewater flows back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, is mixed with tap water and then enters the two reverse osmosis filter elements again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first flow limiting valve 14a and the second flow limiting valve 14b are opened, and at the moment, the two reverse osmosis filter elements do not produce pure water; running water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b after passing through the booster pump 12 (the pump is not started), then respectively flows out of the waste water side of the two reverse osmosis filter elements in two paths, and one path of the running water flows back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b and is mixed with the running waterEnters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again, and can supply the first branch P with a large flow rate due to the open state of the first flow limiting valve 14a and the second flow limiting valve 14b₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the first flow limiting valve 14a and the second flow limiting valve 14b due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the life faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of the first cup of water is effectively solved. Moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example ten: please refer to fig. 10. In this embodiment, on the basis of the ninth embodiment, a pre-filter 17a is added to the front end of the booster pump 12; the type of the preposed filter element 17a can be PP with different forms, active carbon with different forms, ultrafiltration, nanofiltration, composite filter elements made of the materials and the like, and the water outlet flow of the preposed filter element 17a is less than 8L/min.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is coarsely filtered by the preposed filter element 17a, then respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, is converged after being filtered, and is discharged by the drinking faucet for drinking; and the wastewater flows back to the front part of the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, is mixed with the effluent of the front filter element 17a, and then enters the two reverse osmosis filter elements again for secondary filtration, so that zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first flow limiting valve 14a and the second flow limiting valve 14b are opened, and at the moment, the two reverse osmosis filter elements do not produce pure water; tap water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b after passing through the booster pump 12 (the pump is not started), then respectively flows out of the two reverse osmosis filter element wastewater sides in two paths, one path of tap water is mixed with tap water and then enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again before flowing back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, and the first branch P can be treated due to the fact that the first flow limiting valve 14a and the second flow limiting valve 14b are in an open state and the flow is large₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the first flow limiting valve 14a and the second flow limiting valve 14b due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the life faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of the first cup of water is effectively solved. Moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example eleven: please refer to fig. 11. In this embodiment, on the basis of the ninth embodiment, a post-filter element 17b is added to the pure water outlet merging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11 b; the kind of the post-filter 17b may be activated carbon of different forms.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; running water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, is filtered and then is converged, and is discharged by a drinking water tap for drinking after passing through the post-positioned filter element 17 b; the wastewater flows back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, is mixed with tap water and then enters the two reverse osmosis filter elements again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first flow limiting valve 14a and the second flow limiting valve 14b are opened, and at the moment, the two reverse osmosis filter elements do not produce pure water; tap water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b after passing through the booster pump 12 (the pump is not started), then respectively flows out of the two reverse osmosis filter element wastewater sides in two paths, one path of tap water is mixed with tap water and then enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b again before flowing back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, and the first branch P can be treated due to the fact that the first flow limiting valve 14a and the second flow limiting valve 14b are in an open state and the flow is large₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the first flow limiting valve 14a and the second flow limiting valve 14b due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the life faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of the first cup of water is effectively solved. And because the domestic water flow is larger, the domestic water can flush when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11bPollutants such as water scale, organic matters and the like deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements are brushed, so that the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Example twelve: please refer to fig. 12. In this embodiment, on the basis of the ninth embodiment, a front filter element 17a is added at the front end of the booster pump 12, and a rear filter element 17b is added on a pure water outlet merging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11 b; the type of the preposed filter element 17a can be PP with different forms, active carbon with different forms, ultrafiltration, nanofiltration, composite filter elements made of the materials and the like, and the water outlet flow of the preposed filter element 17a is less than 8L/min; the kind of the post-filter 17b may be activated carbon of different forms.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is coarsely filtered by the preposed filter element 17a, then respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, is converged after being filtered, and is discharged by the drinking water faucet for drinking after passing through the postposition filter element 17 b; and the wastewater flows back to the front part of the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, is mixed with the effluent of the front filter element 17a, and then enters the two reverse osmosis filter elements again for secondary filtration, so that zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the first flow limiting valve 14a and the second flow limiting valve 14b are opened, and at the moment, the two reverse osmosis filter elements do not produce pure water; running water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b after passing through the booster pump 12 (the pump is not started), then respectively flows out of the two reverse osmosis filter element waste water sides in two paths, and one path of the running water is mixed with the running water and then enters the first reverse osmosis filter element 12 again before flowing back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14bThe first flow limiting valve 14a and the second flow limiting valve 14b are in an open state, so that the flow rate of the permeate filter element 11a and the second reverse osmosis filter element 11b is high, and the first branch P can be connected with the permeate filter element 11a and the second reverse osmosis filter element 11b₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the first flow limiting valve 14a and the second flow limiting valve 14b due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are prolonged. The other path is directly discharged through a domestic tap for domestic water, and the residual raw wastewater in part of the system is discharged through the domestic tap. Namely, when a user opens the life faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and the problem of the first cup of water is effectively solved. Moreover, as the domestic water flow is large, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pollutants such as scale and organic matters deposited on the side surfaces of the wastewater of the two reverse osmosis filter elements can be washed away, the scaling risk of the two reverse osmosis filter elements is reduced, and the service lives of the two reverse osmosis filter elements are prolonged; while the process can be started in the first branch P₁A second branch P₂And the first flow limiting valve 14a and the second flow limiting valve 14b are washed, so that the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

To facilitate the control of the inflow, it is possible to provide the flow path upstream of the pre-filter 17a or at the pump inlet 121 and the first branch P on the basis of the above-described embodiment₁A water inlet valve is arranged between the junction and the front filter element 17a, and the water inlet valve is a valve body with a full-open or full-close function.

The above description is only an alternative embodiment of the present invention, and 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, comprising:

2. The waterway system of claim 1, further comprising a second reverse osmosis filter element disposed on the first leg, the second reverse osmosis filter element having a second water inlet in communication with the first waste water inlet, a second water outlet in communication with the sanitary water inlet, and a second waste water outlet in communication with the potable water inlet.

3. The waterway system of claim 1, further comprising a second reverse osmosis filter element having a second water inlet, a second water outlet, and a second waste water outlet, the second water inlet being in communication with the pump outlet, the second waste water outlet being in communication with the pump inlet via a second branch, the second branch having a second flow restriction valve and a second one-way valve disposed thereon, the second one-way valve having a flow restriction state and a fully open state, the second water outlet being in communication with the potable water inlet, the water outlet assembly being electrically connected to the second flow restriction valve;

4. The waterway system of claim 3, wherein the second flow restriction valve is open in a fully open state when the sanitary water inlet is in communication with the drain.

5. The waterway system of any one of claims 1-4, further comprising a pre-filter disposed upstream of the booster pump, the water outlet end of the first one-way valve being in communication with the pump inlet.

6. The waterway system of claim 5, wherein a fill valve is disposed between the prepositioned filter element and a location upstream of the prepositioned filter element or where the pump inlet is located at the intersection of the flow path and the first branch.

7. The waterway system of claim 5, further comprising a post-filter disposed in the flow path between the first reverse osmosis filter and the potable water inlet.

8. The waterway system of claim 7, wherein the pre-filter is a PP filter element, an activated carbon filter element, an ultrafiltration filter element, or a nanofiltration filter element; the post-positioned filter element is an activated carbon filter element.

9. The waterway system of claim 5, wherein the outflow rate of the pre-filter element is less than 8L/min.

10. The waterway system of any one of claims 1-4, further comprising a post-filter disposed in the flow path between the first reverse osmosis filter and the potable water inlet.