CN217323458U

CN217323458U - Waterway system and water purifier

Info

Publication number: CN217323458U
Application number: CN202123392177.5U
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: 2022-08-30
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a waterway system and water purifier, waterway system communicates the waste water inlet of reverse osmosis filter core to the pump inlet through first branch road, mixes the back reentrant reverse osmosis filter core with the running water and carries out secondary filter. The technical scheme of the application can greatly reduce the discharge of waste water.

Description

Waterway system and water purifier

Technical Field

The utility model relates to a water purifier technical field, in particular to waterway system and be provided with this waterway system's water purifier.

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 the process. The process of the core component reverse osmosis filter element of the water purifier is actually a liquid concentration process, the salt content of 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a waterway system and water purifier, the too much problem of waste water that the waterway system that aims at solving among the current water purifier produced.

In order to achieve the above object, the utility model provides a water path system, including consecutive booster pump, first reverse osmosis filter core and play water subassembly, it has outlet, drinking water inlet and life water inlet to go out the water subassembly, the drinking water inlet with the delivery port intercommunication of first reverse osmosis filter core, the waste water mouth intercommunication of life water inlet and first reverse osmosis filter core, the water inlet of first reverse osmosis filter core with the pump export intercommunication of booster pump, the pump entry of booster pump is used for with the water source intercommunication, still includes:

the first check valve and the first flow limiting valve are arranged on the first branch, and the flow direction of the first check valve faces to the pump inlet; the first flow limiting valve has a flow limiting mode and a fully open mode;

the first high-pressure switch and the second high-pressure switch are respectively and correspondingly arranged between the water outlet of the first reverse osmosis filter element and the drinking water inlet and between the waste water inlet of the first reverse osmosis filter element and the domestic water inlet;

the first high-voltage switch is electrically connected with the booster pump, and the second high-voltage switch is electrically connected with the first current limiting valve.

In an embodiment, a second check valve is disposed between the water outlet of the first reverse osmosis filter element and the first high-pressure switch, and a third check valve is disposed between the waste water outlet of the first reverse osmosis filter element and the second high-pressure switch.

In an embodiment, the waterway system further includes a second reverse osmosis filter element disposed on the first branch, the water inlet of the second reverse osmosis filter element is communicated with the waste water inlet of the first reverse osmosis filter element, the waste water inlet of the second reverse osmosis filter element is communicated with the domestic water inlet via the third check valve, and the water outlet of the second reverse osmosis filter element is communicated with the drinking water inlet via the second check valve.

In an embodiment, the water inlet of the second reverse osmosis filter element is communicated with the pump outlet, the waste water port of the second reverse osmosis filter element is communicated with the pump inlet through a second branch, a second flow limiting valve and a fourth one-way valve are arranged on the second branch, the flow direction of the fourth one-way valve is changed from the waste water port of the second reverse osmosis filter element to the pump inlet, the flow direction of the second flow limiting valve faces the pump inlet, the second flow limiting valve is in a flow limiting state and a full-open state, the waste water port of the second reverse osmosis filter element is communicated with the domestic water inlet through the third one-way valve, and the second high-voltage switch is electrically connected with the second flow limiting valve.

In an embodiment, the waterway system further comprises a pre-filter element, the pre-filter element is arranged at the upstream of the booster pump, and the water outlet end of the first one-way valve is communicated with the pump outlet.

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.

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.

The application still provides a water purifier, including water path system, water path system includes consecutive booster pump, first reverse osmosis filter core and play water subassembly, it has outlet, drinking water inlet and life water inlet to go out the water subassembly, the drinking water inlet with the delivery port intercommunication of first reverse osmosis filter core, the waste water mouth intercommunication of life water inlet and first reverse osmosis filter core, the water inlet of first reverse osmosis filter core with the pump export intercommunication of booster pump, the pump entry of booster pump is used for with the water source intercommunication, still includes:

the first high-voltage switch and the second high-voltage switch are respectively and correspondingly arranged between the water outlet of the first reverse osmosis filter element and the drinking water inlet and between the waste water inlet of the first reverse osmosis filter element and the domestic water inlet;

The application provides a collocation mechanical faucet's reverse osmosis waste water return-flow system, before passing through the pipeline backward flow to the reverse osmosis filter core with waste water, reentrant reverse osmosis filter core carries out the secondary filter after mixing with the running water. The method can greatly reduce the discharge of waste water while ensuring the performance and the service life of the reverse osmosis filter element; simultaneously, the wastewater is connected with the domestic water outlet assembly, wastewater discharge is completed when the domestic water outlet assembly is opened, and the wastewater is recycled, so that the requirement of ecological environment protection is met.

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

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 waterway system according to a first embodiment of the present application;

FIG. 2 is a schematic flow diagram of a waterway system according to a second embodiment of the present application;

FIG. 3 is a schematic flow diagram of a waterway system according to a third embodiment of the present application;

FIG. 4 is a schematic flow diagram of a waterway system according to a fourth embodiment of the present application;

FIG. 5 is a schematic flow diagram of a fifth embodiment of a waterway system of the present application;

FIG. 6 is a schematic flow diagram of a waterway system of a sixth embodiment of the present application;

FIG. 7 is a schematic flow diagram illustrating a waterway system of a seventh embodiment of the present application;

FIG. 8 is a schematic flow diagram of an eighth embodiment of a waterway system according to the present application;

FIG. 9 is a schematic flow diagram of a waterway system according to a ninth embodiment of the present application;

FIG. 10 is a schematic flow diagram of a waterway system according to a tenth embodiment of the present application;

FIG. 11 is a schematic flow diagram of an eleventh embodiment of a waterway system according to the present application;

fig. 12 is a schematic flow diagram of a waterway system according to a twelfth embodiment of the present application.

The reference numbers illustrate:

reference numerals	Name(s)	Reference numerals	Name(s)
				11a	First reverse osmosis filter element	111	First water inlet
112	The first water outlet	113	The 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	15c	Third check valve
15d	Fourth check valve	16a	A first high voltage switch
				16b	Second high-voltage switch	13	Water outlet assembly
131	Drinking water inlet	132	Water inlet for domestic water
				133	Water outlet	17a	Front-mounted filter element
17b	Rear filter element

The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The application provides a waterway system and a water purifier comprising the waterway system.

The waterway system includes: the water purifier comprises a first reverse osmosis filter element 11a, a booster pump 12, a water outlet assembly 13, a first one-way valve 15a, a first flow limiting valve 14a, a first high-pressure switch 16a and a second high-pressure switch 16 b. The first reverse osmosis cartridge 11a has a water inlet (first water inlet 111), a water outlet (first water outlet 112) and a waste water port (first waste water port 113); the booster pump 12 has a pump inlet 121 and a pump outlet 122, the pump inlet 121 is configured to communicate with a water source, the pump outlet 122 communicates with the first water inlet 111, and the first waste water inlet 113 communicates with the pump inlet 121 through a first branch P1; the water outlet assembly 13 has a water outlet 133, a drinking water inlet 131 and a domestic water inlet 132; 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 on the first branch P1, and the flow direction of the first check valve 15a flows from the first waste water port 113 to the pump inlet 121; the first flow restriction valve 14a is provided on the first branch P1, the first flow restriction valve 14a having a flow restriction mode and a fully open mode; the first high-pressure switch 16a is disposed between the first water outlet 112 and the drinking water inlet 131; the second high pressure switch 16b is disposed between the first waste water port 113 and the domestic water inlet 132.

Wherein, the first high-voltage switch 16a is electrically connected with the booster pump 12, the second high-voltage switch 16b is electrically connected with the first flow limiting valve 14a, when the water outlet assembly 13 conducts the drinking water inlet 131 and the water outlet 133, the booster pump 12 is started, and the first flow limiting valve 14a keeps the flow limiting mode. When the domestic water inlet 132 and the drain 133 are communicated, the booster pump 12 maintains the power-off state, and the first flow restriction valve 14a starts the fully-open mode.

The utility model provides a zero waste water system of reverse osmosis of two tap of collocation machinery, before passing through the pipeline backward flow to first reverse osmosis filter core 11a with waste water, mix the back with the running water and get into first reverse osmosis filter core 11a once more and carry out the secondary filter. 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 11 a; simultaneously, the wastewater is connected with the domestic faucet, the wastewater discharge is completed when the domestic faucet is opened, and the wastewater is secondarily utilized, so that the requirement of ecological environmental protection is met.

When a user opens the life faucet, 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 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, 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; meanwhile, the first branch P1 and the first flow limiting valve 14a can be flushed in the process, the risk of blockage of the first flow limiting valve 14a due to scaling is reduced, and the service life of the 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.

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 reverse osmosis filter element through the first branch P1, the system also connects the reverse osmosis filter element wastewater with a domestic faucet, the domestic faucet is opened by a user to complete the flushing of the reverse osmosis filter element and the first branch P1, the wastewater is discharged for the domestic use 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. A mechanical double-water tap is added into the wastewater backflow system, a second one-way valve 15b is arranged between the first water outlet 112 and the first high-pressure switch 16a, and a third one-way valve 15c is arranged between the first wastewater outlet 113 and the second high-pressure switch 16 b.

The first flow restriction valve 14a on the first branch P1 is a valve body having a flow restriction function. The check valve is combined with the high-voltage switch, so that frequent starting is avoided: due to the existence of the one-way valve, when the drinking water tap is closed, water is limited between the one-way valve and the tap, the water pressure is kept stable, and the high-pressure switch receives a stable pressure signal and keeps an off state.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 second high-pressure switch 16b detects the pressure change, and opens the first flow-limiting valve 14 a; 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 because the first flow limiting valve 14a is in an open state and has a large flow, the first branch P1 and the first flow limiting valve 14a can be flushed, 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 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 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, 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; meanwhile, the first branch P1 and the first flow limiting valve 14a can be flushed in the process, the risk that the first flow limiting valve 14a is blocked 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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 one path of pure water and one path of wastewater, the pure water is discharged by a drinking water faucet for drinking, the wastewater flows back to the front of the booster pump 12 through the first flow limiting valve 14a and is mixed with the effluent of the preposed filter element 17a to enter the first reverse osmosis filter element 11a again for filtration, and zero discharge of the wastewater is realized.

Example three: please refer to fig. 3. In this embodiment, on the basis of the first embodiment, a post-filter 17b is added to the pure water outlet pipe of the first reverse osmosis filter 11a before the second check valve 15b and the first high-pressure switch 16a, and the type of the post-filter 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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 second high-pressure switch 16b detects the pressure change, and opens the first flow-limiting valve 14 a; 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 because the first flow limiting valve 14a is in an open state and has a large flow, the first branch P1 and the first flow limiting valve 14a can be flushed, 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 tap, 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 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; meanwhile, the first branch P1 and the first flow limiting valve 14a can be flushed in the process, the risk that the first flow limiting valve 14a is blocked 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 preposed filter element 17a is additionally arranged at the upstream of the booster pump 12, and a postpositive filter element 17b is additionally arranged on a pure water outlet pipeline of the reverse osmosis filter element and in front of a second one-way valve 15b and a first high-pressure switch 16 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 opens the drinking water tap: when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 second high-pressure switch 16b detects a pressure change, and opens the first flow restriction valve 14 a; 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 because the first flow limiting valve 14a is in an open state and has a large flow, the first branch P1 and the first flow limiting valve 14a can be flushed, 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 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 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, 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; meanwhile, the first branch P1 and the first flow limiting valve 14a can be flushed in the process, the risk that the first flow limiting valve 14a is blocked 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 P1, the second reverse osmosis filter element 11b is provided with a water inlet (a second water inlet 114), a water outlet (a second water outlet 115) and a waste water inlet (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 through a third one-way valve 15c, and the second water outlet 115 is communicated with the drinking water inlet 131 through a second one-way valve 15 b.

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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started to start water production; after tap water flows into the first reverse osmosis filter element 11a, pure water and waste water are divided into one path, the pure water flows to the second one-way valve 15b, the waste water flows into the second reverse osmosis filter element 11b and is subjected to secondary filtration, the pure water flows to the second one-way valve 15b 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 waste water is mixed with the tap water before flowing back 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, 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 second high-pressure switch 16b detects the pressure change, and opens the first flow-limiting valve 14 a; at the moment, the reverse osmosis filter element does not generate pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 and then flows out of the wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out of the wastewater side of the second reverse osmosis filter element 11b through two paths, one path of the 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 flow limiting valve 14a is in an open state and has a large flow rate, so that the first branch P1 and the first flow limiting valve 14a can be flushed, 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 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, 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; meanwhile, the first branch P1 and the first flow limiting valve 14a can be washed in the process, the risk that the first flow limiting valve 14a is blocked due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic water tap is opened, the waste water generated and accumulated in the water making process can be discharged through the domestic water tap for domestic water use, and the waste water utilization is really realized.

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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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, and then is divided into one path of pure water and one path of wastewater, the pure water flows to the second one-way valve 15b, 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 second one-way valve 15b 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 booster pump 12 through the first flow limiting valve 14a and then 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 wastewater discharge is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the water outlet 133): the second high-pressure switch 16b detects the pressure change, and opens the first flow-limiting valve 14 a; at the moment, the reverse osmosis filter element does not generate 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 flow limiting valve 14a is in an open state and has a large flow, so that the first branch P1 and the first flow limiting valve 14a can be flushed, 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 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; and because the domestic water flow is larger, when passing through the first reverse osmosis filter element 11a and the second reverse osmosis filter element, pollutants such as incrustation scale, organic matters and the like deposited on the side surfaces of the waste water 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; meanwhile, the process can flush the first branch P1 and the first flow limiting valve 14a, 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, based on the fifth embodiment, a post-filter 17b is added to the pure water outlet pipes of the first and second reverse

osmosis filter elements

11a, 11b, and before the second check valve 15b and the first high-pressure switch 16a, and the type of the post-filter 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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 flows to the second one-way valve 15b, the waste water flows into the second reverse osmosis filter element 11b and is divided into a path of pure water and a path of waste water after secondary filtration, the pure water flows to the second one-way valve 15b 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 waste water is mixed with the tap water before flowing back 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, and zero discharge of the waste water is realized.

The user opens the life faucet (the life water inlet 132 and the water outlet 133 are communicated): the second high-pressure switch 16b detects the pressure change, and opens the first flow-limiting valve 14 a; at the moment, the reverse osmosis filter element does not generate 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 flow limiting valve 14a is in an open state and has a large flow, so that the first branch P1 and the first flow limiting valve 14a can be flushed, 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. When a user opens the domestic water faucet, a flushing program of the system is started, tap water with low ion concentration can replace waste water with high ion concentration accumulated on 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, 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; meanwhile, the process can flush the first branch P1 and the first flow limiting valve 14a, 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 pure water outlet pipelines of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and in front of the second one-way valve 15b and the first high-pressure switch 16 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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 second one-way valve 15b, the wastewater flows into the second reverse osmosis filter element 11b and is secondarily filtered, and then is divided into one path of pure water and one path of wastewater, the pure water flows to the second one-way valve 15b 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 front of the pump 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 second high-pressure switch 16b detects a pressure change, and opens the first flow restriction valve 14 a; at the moment, the reverse osmosis filter element does not generate pure water, tap water enters the first reverse osmosis filter element 11a through the booster pump 12 and then flows out of the wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out of the wastewater side of the second reverse osmosis filter element 11b through two paths, one path of the 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 flow limiting valve 14a is in an open state and has a large flow rate, so that the first branch P1 and the first flow limiting valve 14a can be flushed, 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 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, 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; meanwhile, the process can flush the first branch P1 and the first flow limiting valve 14a, 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 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 is provided with a water inlet (a second water inlet 114), a water outlet (a second water outlet 115) and a waste water port (a second waste water port 116), the second water inlet 114 is communicated with the pump outlet 122, the second waste water port 116 is communicated with the pump inlet 121 through a second branch P2, a second flow limiting valve 14b and a fourth one-way valve 15d are arranged on the second branch P2, the flow direction of the fourth one-way valve 15d flows from the second waste water port 116 to the pump inlet 121, the second flow limiting valve 14b has a flow limiting state and a full opening state, the second waste water port 116 is communicated with the domestic water inlet 132 through a third one-way valve 15c, and the second high-pressure switch 16b is electrically connected with the second flow limiting valve 14 b. When the outlet assembly 13 communicates the drinking water inlet 131 with the outlet 133, the second flow restriction valve 14b maintains the flow restriction mode. When the outlet assembly 13 communicates the domestic water inlet 132 with the outlet 133, the second flow restriction valve 14b starts the fully open mode.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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 second high pressure switch 16b detects a change in pressure and opens the first flow restriction valve 14a and the second flow restriction valve 14b, at which time both reverse osmosis cartridges do not produce pure water. Tap water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of two paths from the waste water sides of the two filter elements, one path of the tap water is mixed with the tap water and then enters the two reverse osmosis filter elements again before flowing back to the booster pump 12 through the two flow limiting valves, and the two flow limiting valves are in an open state and have larger flow, so that the two branch paths and the two flow limiting valves can be flushed, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service life of the reverse osmosis filter elements 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. When a user opens the domestic faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the two reverse osmosis filter elements, and the problem of first cup of water is effectively solved. And because the domestic water flow is great, when passing through two reverse osmosis filter cores, can erode the pollutant such as incrustation scale, organic matter of two reverse osmosis filter core waste water side surface deposit, reduce two reverse osmosis filter core scale deposit risks, prolong two reverse osmosis filter core life. Meanwhile, the process can flush the two branch circuits and the two flow limiting valves, 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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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; the wastewater flows back to the front of the booster pump 12 through the two flow limiting valves and 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 second high pressure switch 16b detects a pressure change and opens the first and

second restriction valves

14a and 14b, when the two reverse osmosis cartridges do not produce pure water. Tap water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of two paths from the waste water sides of the two filter elements, one path of the tap water is mixed with the tap water and then enters the two reverse osmosis filter elements again before flowing back to the booster pump 12 through the two flow limiting valves, and the two flow limiting valves are in an open state and have larger flow, so that the two branch paths and the two flow limiting valves can be flushed, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service life of the reverse osmosis filter elements 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. When a user opens the domestic faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the two reverse osmosis filter elements, and the problem of first cup of water is effectively solved. And because the domestic water flow is great, when passing through two reverse osmosis filter cores, can wash away the pollutant such as incrustation scale, organic matter of two reverse osmosis filter core waste water side surface deposit, reduce two reverse osmosis filter core scale deposit risks, prolong two reverse osmosis filter core life. Meanwhile, the process can flush the two branch circuits and the two flow limiting valves, 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 on a pure water outlet converging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, in front of a one-way valve and a first high-pressure switch 16 a; 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): the high-voltage switch 1 detects the pressure change, starts the booster pump 12 and starts to produce water; 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 faucet for drinking after passing through the post-filter element 17 b; the wastewater flows back to the booster pump 12 through the two flow limiting valves, 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 second high pressure switch 16b detects a change in pressure and opens the first flow restriction valve 14a and the second flow restriction valve 14b, at which time both reverse osmosis cartridges do not produce pure water. Tap water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of two paths from the waste water sides of the two filter elements, one path of the tap water is mixed with the tap water and then enters the two reverse osmosis filter elements again before flowing back to the booster pump 12 through the two flow limiting valves, and the two flow limiting valves are in an open state and have larger flow, so that the two branch paths and the two flow limiting valves can be flushed, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service life of the reverse osmosis filter elements is prolonged. The other path is directly discharged through a life faucet for use, and part of the original waste water remained in the system is discharged through the life faucet. When a user opens the domestic faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the two reverse osmosis filter elements, and the problem of first cup of water is effectively solved. And because the domestic water flow is great, when passing through two reverse osmosis filter cores, can wash away the pollutant such as incrustation scale, organic matter of two reverse osmosis filter core waste water side surface deposit, reduce two reverse osmosis filter core scale deposit risks, prolong two reverse osmosis filter core life. Meanwhile, the process can flush the two branch circuits and the two flow limiting valves, 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 water tap is opened, the waste water generated and accumulated in the water making process can be discharged through the domestic water tap for domestic water use, and the waste water utilization is really realized.

Example twelve: please refer to fig. 12. In the 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 water converging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b and in front of a one-way valve and a first high-pressure switch 16 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): when the first high-voltage switch 16a detects the pressure change, the booster pump 12 is started 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; the wastewater flows back to the front of the booster pump 12 through the two flow limiting valves and is mixed with the effluent of the preposed filter element 17a, and then enters the two reverse osmosis filter elements for secondary filtration, so that zero discharge of the wastewater is realized.

The user opens the life faucet (the life water inlet 132 and the water outlet 133 are communicated): the second high pressure switch 16b detects a pressure change and opens the first and

second restriction valves

14a and 14b, when the two reverse osmosis cartridges do not produce pure water. Tap water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of two paths from the waste water sides of the two filter elements, one path of the tap water is mixed with the tap water and then enters the two reverse osmosis filter elements again before flowing back to the booster pump 12 through the two flow limiting valves, and the two flow limiting valves are in an open state and have larger flow, so that the two branch paths and the two flow limiting valves can be flushed, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service life of the reverse osmosis filter elements is prolonged. The other path is directly discharged through a life faucet for use, and part of the original waste water remained in the system is discharged through the life faucet. When a user opens the domestic faucet, the flushing program of the system is started, tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the two reverse osmosis filter elements, and the problem of first cup of water is effectively solved. And because the domestic water flow is great, when passing through two reverse osmosis filter cores, can wash away the pollutant such as incrustation scale, organic matter of two reverse osmosis filter core waste water side surface deposit, reduce two reverse osmosis filter core scale deposit risks, prolong two reverse osmosis filter core life. Meanwhile, the process can flush the two branch circuits and the two flow limiting valves, 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.

In order to facilitate the control of the inflow water, on the basis of the above embodiment, an inflow valve may be disposed between the upstream of the pre-filter 17a or the intersection of the flow path where the pump inlet 121 is located and the first branch P1 and the pre-filter 17a, and the inflow valve is a valve body with a full-open or full-close function.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. The utility model provides a waterway system, includes consecutive booster pump, first reverse osmosis filter core and goes out the water subassembly, it has outlet, drinking water inlet and life water inlet to go out the water subassembly, the drinking water inlet with the delivery port intercommunication of first reverse osmosis filter core, the waste water mouth intercommunication of life water inlet and first reverse osmosis filter core, the water inlet of first reverse osmosis filter core with the pump export intercommunication of booster pump, the pump inlet of booster pump is used for communicating with the water source, the waste water mouth of first reverse osmosis filter core through first branch road with pump entry intercommunication, its characterized in that still includes:

2. The waterway system of claim 1, wherein a second one-way valve is disposed between the water outlet of the first reverse osmosis filter element and the first high pressure switch, and a third one-way valve is disposed between the waste water outlet of the first reverse osmosis filter element and the second high pressure switch.

3. The waterway system of claim 2, further comprising a second reverse osmosis filter element disposed on the first branch, the water inlet of the second reverse osmosis filter element being in communication with the waste water port of the first reverse osmosis filter element, the waste water port of the second reverse osmosis filter element being in communication with the domestic water inlet via the third one-way valve, and the water outlet of the second reverse osmosis filter element being in communication with the potable water inlet via the second one-way valve.

4. The waterway system of claim 2, further comprising a second reverse osmosis filter element, wherein the water inlet of the second reverse osmosis filter element is communicated with the pump outlet, the waste water port of the second reverse osmosis filter element is communicated with the pump inlet through a second branch, a second flow limiting valve and a fourth one-way valve are arranged on the second branch, the flow direction of the fourth one-way valve is from the waste water port of the second reverse osmosis filter element to the pump inlet, the flow direction of the second flow limiting valve is towards the pump inlet, the second flow limiting valve has a flow limiting state and a full-open state, the waste water port of the second reverse osmosis filter element is communicated with the domestic water inlet through the third one-way valve, and the second high-pressure switch is electrically connected with the second flow limiting valve.

5. The waterway system of any one of claims 2-4, further comprising a pre-filter disposed upstream of the booster pump, the water outlet of the first one-way valve being in communication with the pump outlet.

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

7. The waterway system of claim 6, 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.

8. The waterway system of claim 6, further comprising a post-filter disposed in the flow path between the first reverse osmosis filter and the potable water inlet.

9. The waterway system of claim 8, 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.

10. The waterway system of any one of claims 2-4, further comprising a post-filter disposed in the flow path between the first reverse osmosis filter and the potable water inlet.

11. A water purifier comprising a waterway system according to any one of claims 1 to 10.