CN114262025A

CN114262025A - Water purifier

Info

Publication number: CN114262025A
Application number: CN202111649673.6A
Authority: CN
Inventors: 宾倩韵; 刘梦薇; 孙天厚; 谈菲
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: 2022-04-01

Abstract

The invention discloses a water purifier, wherein, the water purifier reflows the waste water to a reverse osmosis filter element through a pipeline, and the waste water is mixed with tap water and then enters the reverse osmosis filter element again for secondary filtration, so that the discharge of the waste water can be greatly reduced while the performance and the service life of the reverse osmosis filter element are ensured; 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 secondarily utilized to meet the requirements of ecological environment protection.

Description

Water purifier

Technical Field

The application relates to the technical field of water purifiers, in particular to a 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 this process. The process of the core component reverse osmosis filter element of the water purifier 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 application mainly aims to provide a water purifier, and aims to solve the problem that the excessive waste water generated by the existing water purifier is not beneficial to resource utilization.

To achieve the above object, the present invention provides a water purifier 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 inlet is communicated with one end of a first wastewater direct discharge pipeline;

the intelligent water outlet assembly 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 flow limiting valve is arranged on the first waste water direct drainage pipeline, has a flow limiting effect, flows from the first waste water opening to the other end of the first waste water direct drainage pipeline, and has a flow limiting state and a full-open state;

the first switch valve is arranged on the first waste water straight-discharging pipeline and is positioned at the downstream of the first flow limiting valve, and a flow path between the first switch valve and the first flow limiting valve is communicated with the pump inlet through a first branch;

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 intelligent water outlet assembly is electrically connected with the booster pump, the first flow limiting valve and the first switch valve, when the drinking water inlet is communicated with the water outlet, the booster pump is started, the first flow limiting valve keeps a flow limiting state, the first switch valve is closed, and when the time for communicating the drinking water inlet with the water outlet exceeds a first preset time length, the first flow limiting valve is opened in a full-open state, and the first switch valve is opened;

when the domestic water inlet is communicated with the water outlet, the booster pump is powered off, the first flow limiting valve is opened in a fully-opened state, and the first switch valve is closed.

In one embodiment, when the time that the intelligent water outlet assembly is not opened exceeds a second preset time, the first flow limiting valve is opened in a fully opened state, and the first switch valve is opened.

In an embodiment, the water purifier further comprises a second reverse osmosis filter element disposed on the flow path between the first waste water inlet and the first flow limiting valve, 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 water inlet end of the first flow limiting valve, the second water outlet being communicated with the flow path between the first water outlet and the drinking water inlet.

In one embodiment, the 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 outlet, the second water inlet is communicated with the pump outlet, the second waste water outlet is communicated with one end of a second waste water direct discharge pipeline, a second flow limiting valve and a second switch valve are arranged on the second waste water direct discharge pipeline, the second flow limiting valve has a flow limiting function, the flow direction of the second flow limiting valve flows from the second waste water outlet to the other end of the second waste water direct discharge pipeline, and the second flow limiting valve has a flow limiting state and a full-open state; the second switch valve is positioned at the downstream of the second flow limiting valve, a flow path between the second switch valve and the second flow limiting valve is communicated with the pump inlet through a second branch, a second one-way valve is arranged on the second branch, and the flow direction of the second one-way valve flows from the second waste water port to the pump inlet;

when the drinking water inlet and the water outlet are communicated, the second flow limiting valve keeps a flow limiting state, the second switch valve is closed, and when the time for communicating the drinking water inlet and the water outlet exceeds the first preset time length, the second flow limiting valve is opened in a full-open state, and the second switch valve is opened;

when the domestic water inlet is communicated with the water outlet, the second flow-limiting valve is opened in a fully-opened state, and the second switch valve is in a closed state;

when the time that the intelligent water outlet assembly is not opened exceeds the second preset time length, the second flow limiting valve is opened in a fully open state, and the second switch valve is opened.

In one embodiment, the water purifier 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 inlet.

In one embodiment, the water purifier further includes a post-filter disposed on a flow path between the first reverse osmosis filter and the drinking water inlet.

In one embodiment, the water yield of the preposed filter element is not more 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.

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.

The application provides a collocation mechanical faucet's reverse osmosis high recovery rate system, before passing through the pipeline backward flow to first reverse osmosis filter core with waste water, reentrant first 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 first reverse osmosis filter element; meanwhile, the waste water is connected with the domestic faucet, the waste water discharge is completed when the domestic faucet is opened, and the waste water is recycled, so that the ecological environment-friendly requirement is met. In addition, a first waste water direct discharge pipeline is arranged and can be used for directly discharging waste water when necessary.

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 process can flush the wastewater backflow waterway 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 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.

When the drinking water taking time of a user reaches a certain value, the waste water direct discharging program is started, the initial level can be recovered within a short time of the TDS of the discharged water, and the influence on the drinking water flow is weak.

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 view of a first embodiment of a waterway system of a water purifier according to the present application;

FIG. 2 is a schematic view of a flow path of a waterway system of a water purifier according to a second embodiment of the present application;

FIG. 3 is a schematic view of a third embodiment of a waterway system of a water purifier according to the present application;

FIG. 4 is a schematic view of a fourth embodiment of a waterway system of a water purifier according to the present application;

FIG. 5 is a schematic view of a fifth embodiment of a flow path of a waterway system in a water purifier according to the present application;

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

FIG. 7 is a schematic view of a flow path of a waterway system of a water purifier according to a seventh embodiment of the present application;

FIG. 8 is a schematic view of a flow path of an eighth embodiment of a waterway system in a water purifier according to the present application;

FIG. 9 is a schematic view of a ninth embodiment of a waterway system in a water purifier according to the present application;

FIG. 10 is a schematic view of a tenth embodiment of a waterway system of a water purifier according to the present application;

FIG. 11 is a schematic view of a flow path of an eleventh embodiment of a waterway system in a water purifier according to the present application;

fig. 12 is a schematic view of a flow path of a water circuit system in a water purifier according to a twelfth embodiment of the present invention.

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	Q₁	First wastewater direct discharge pipeline
Q₂	Second wastewater direct discharge pipeline	14a	First flow limiting valve
				14b	Second flow limiting valve	18a	First switch valve
18b	Second switch valve	15a	First check valve
				15b	Second check valve	13	Water outlet assembly
131	Man-mouth for drinking water	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 application provides a high water saving system of reverse osmosis of collocation intelligence tap, before passing through the pipeline backward flow to first reverse osmosis filter core 11a with waste water, reentrant first reverse osmosis filter core 11a 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 first reverse osmosis filter element 11 a; meanwhile, the wastewater is connected with the domestic faucet, so that the wastewater discharge is completed when the domestic faucet is opened, and the wastewater is recycled, thereby meeting the requirements of ecological environment protection. In addition, a first wastewater direct discharge pipeline Q is also arranged₁And can be used for directly discharging waste water when necessary.

When a user opens a living water tap (the living water inlet 132 is communicated with the water outlet 133), tap water with lower ion concentration can replace the waste water with high ion concentration accumulated on the waste water side of the first reverse osmosis filter element 11a, so that 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 process can directly discharge the first wastewater into the pipeline Q₁And 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.

When the drinking water taking time of a user reaches a certain value (the first preset time is preferably 1-5min), a wastewater direct discharging program is started (the time is preferably 5-300s), at the moment, water is taken and wastewater is discharged at the same time, the initial level of the discharged water TDS can be recovered in a short time, and the influence on the drinking water flow is weak.

The application provides a high water saving system of reverse osmosis of collocation intelligence tap. 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 water purifier 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 water purifier 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 first reverse osmosis filter element 11a wastewater flows back to the front of the first reverse osmosis filter element 11a through the return pipeline, the system also connects the first reverse osmosis filter element 11a wastewater with a domestic water tap, the first reverse osmosis filter element 11a and the wastewater return pipeline are washed by opening the domestic water tap (the domestic water inlet 132 is communicated with the water outlet 133) by a user, 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. In addition, a direct waste water discharge pipeline is provided, and the direct waste water discharge pipeline can be used for directly discharging waste water when necessary.

The first embodiment is as follows: see 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 purifier includes: the water purifier comprises a first reverse osmosis filter element 11a, a booster pump 12, an intelligent water outlet assembly 13, a first flow limiting valve 14a, a first switch valve 18a and a first one-way valve 15 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 used for communicating with a water source, the pump outlet 122 is communicated with the first water inlet 111, the first waste water outlet 113 is communicated with the first waste water direct discharging pipeline Q₁One end of the connecting rod is communicated; the intelligent 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 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 flow limiting valve 14a is arranged on the first wastewater direct drainage pipeline Q₁The first flow restriction valve 14a has a flow restriction function, and the flow direction of the first flow restriction valve 14a flows from the first waste water port 113 to the first waste water straight line Q₁The first flow restriction valve 14a has a flow restriction state and a fully open state (in the flow restriction state, the flow rate is small, and may be 5% to 80% in the fully open state, and preferably, the flow rate may be 10% to 30% in the fully open state); the first switch valve 18a is arranged on the first wastewater direct discharge pipeline Q₁Upstream of the first flow restriction valve 14a, and downstream of the first flow restriction valve 14a, the flow path between the first switching valve 18a and the first flow restriction valve 14a passes through the first branch passage P₁Communicates with the pump inlet 121; the first check valve 15a is disposed in the first branch P₁The first check valve 15a flows from the first waste water port 113 to the pump inlet 121. The intelligent water outlet assembly 13 is electrically connected to the booster pump 12, the first flow limiting valve 14a and the first switch valve 18a, when the drinking water inlet 131 is conducted with the water outlet 133, the booster pump 12 is opened, the first flow limiting valve 14a maintains a flow limiting state, the first switch valve 18a is closed, and when the drinking water inlet 131 is conducted with the water outlet 133 for a time period exceeding a first preset time period (preferably 1-5min), the first flow limiting valve 14a is opened in a fully open state, and the first switch valve 18a is opened. When the domestic water inlet 132 and the drain 133 are communicated, the booster pump 12 is de-energized, the first flow restriction valve 14a is opened in a fully open state, and the first switching valve 18a is closed. When the time that the intelligent water outlet assembly 13 is not opened exceeds a second preset time (preferably 10min-10h), the first flow limiting valve 14a is opened in a fully open state, and the first switch valve 18a is opened.

The first waste water outlet 113 is divided into two paths of water outlet, one path of water outlet is directly connected with the domestic water end of the double water faucet, the other path of water outlet is a waste water return pipeline, waste water can flow back to the front of the booster pump 12 through the first flow limiting valve 14a, and a branch of water outlet is a first waste water direct discharge pipeline Q₁And if necessary, the method is used for directly discharging the wastewater. Waste water return line (first branch P)₁And a first wastewater straight-line pipeline Q₁) The first flow limiting valve 14a is a valve body with a flow limiting function; first wastewater straight-line pipeline Q₁The first on-off valve 18a is a valve body having a fully-open or fully-closed function.

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 the moment, 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, one way of tap water is mixed with tap water and then passes through the first reverse osmosis filter element 11a 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 a fully open state and has a large flow, so that a waste water backflow water channel 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 a living water tap (the living water inlet 132 is communicated with the water outlet 133), a 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 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 process can flush the wastewater backflow waterway and the first flow limiting valve 14a, 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.

Wastewater straight-line procedure 1: when the user gets the drinking water, because the waste water backward flow, the play water TDS can increase along with the increase of water intaking time, consequently, design when the user gets after the drinking water time reaches a definite value (first preset duration preferred 1-5min), start the straight row procedure of waste water (time preferred 5-300s), it is the waste water of discharging simultaneously to get water this moment, booster pump 12 keeps starting, keeps normal system water state promptly, first ooff valve 18a opens, the waste water that first reverse osmosis filter core 11a produced is discharged along with the straight row pipeline Q1 of first waste water, the initial level can be resumeed in the play water TDS short time, and it is weak to drinking water flow influence.

Wastewater straight-line procedure 2: when the situation that the user does not use the water purifier for a long time (the second preset time is preferably 10min-10h) is monitored, starting a wastewater direct discharging program 2 (the time is preferably 5-300s), and only discharging wastewater at the moment; the booster pump 12 is not started, the first flow limiting valve 14a and the first switch valve 18a are opened, tap water flows out from the wastewater side after entering the first reverse osmosis filter element 11a depending on the pressure of tap water, and is directly discharged into the first wastewater direct discharge pipeline Q1, so that the replacement of water in the first reverse osmosis filter element 11a and the wastewater pipeline is completed, the first reverse osmosis filter element 11a, the first flow limiting valve 14a and the first switch valve 18a are prevented from scaling, and the service lives of the first reverse osmosis filter element 11a, the first flow limiting valve 14a and the first switch valve 18a are prolonged. Under normal conditions, the user opens the life tap (domestic water inlet 132 and outlet 133 switch on) and can accomplish the washing to first reverse osmosis filter core 11a and waste water return line, and this procedure mainly used avoids having no use domestic water needs after the user got the drinking water, makes backward flow waste water be detained for a long time in first reverse osmosis filter core 11a and return line, causes the incrustation scale deposit and influences life's problem.

Example two: see fig. 2. 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, the type of the front filter element 17a can be PP with different forms, activated carbon with different forms, ultrafiltration, nanofiltration, composite filter elements made of the above materials, and the like, and the water outlet flow of the front filter element 17a is less than or equal to 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.

Example three: see 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.

Example four: see 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 or equal to 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.

Example five: see 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 a flow path between the first waste water port 113 and the first flow limiting valve 14a, the second reverse osmosis filter element 11b is provided with a second water inlet 114, a second water outlet 115 and a second waste water port 116, the second water inlet 114 is communicated with the first waste water port 113, the second waste water port 116 is communicated with a water inlet end of the first flow limiting valve 14a, and the second water outlet 115 is communicated with a flow path between the first water outlet 112 and 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 the moment, the two reverse osmosis filter cores do not produce pure water, tap water enters the first reverse osmosis filter core 11a through the booster pump 12 and then flows out from the waste water side of the first reverse osmosis filter core 11a, enters the second reverse osmosis filter core 11b and then flows out from the waste water side of the second reverse osmosis filter core 11b in two ways, one way of the tap water flows back to the booster pump 12 through the first flow limiting valve 14a and then is mixed with the tap water to enter the first reverse osmosis filter core 11a and the second reverse osmosis filter core 11b again, and the first flow limiting valve 14a is in a fully open state and has a large flow, so that a waste water backflow water channel and the first flow limiting valve 14a can be flushed, 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 cores 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 a living water tap (the living water inlet 132 is communicated with the water outlet 133), a 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 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; meanwhile, the process can flush the wastewater backflow waterway and the first flow limiting valve 14a, 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 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.

Wastewater straight-line procedure 1: when the user got the drinking water, because the waste water backward flow, it can increase along with the increase of water intaking time to go out water TDS, consequently, after the design was got the drinking water time of user and is reached a definite value (first preset duration preferred 1-5min), start the straight row procedure of waste water (time preferred 5-300s), it is the waste water of discharging simultaneously to get water this moment, booster pump 12 keeps starting, keep normal system water state promptly, first ooff valve 18a opens, the waste water that two reverse osmosis filter cores produced is discharged along with the straight row pipeline Q1 of first waste water, it can resume initial level in the water TDS short time of going out, and influence drinking water flow.

Wastewater straight-line procedure 2: when the situation that the user does not use the water purifier for a long time (the second preset time is preferably 10min-10h) is monitored, starting a wastewater direct discharging program 2 (the time is preferably 5-300s), and only discharging wastewater at the moment; the booster pump 12 is not started, the first flow limiting valve 14a and the first switch valve 18a are opened, tap water flows out from the wastewater side after entering the two reverse osmosis filter elements by depending on the pressure of tap water and is directly discharged into the first wastewater direct discharge pipeline Q1, the replacement of water in the two reverse osmosis filter elements and the wastewater pipeline is completed, the two reverse osmosis filter elements, the first flow limiting valve 14a and the first switch valve 18a are prevented from scaling, and the service lives of the two reverse osmosis filter elements, the first flow limiting valve 14a and the first switch valve 18a are prolonged. Under normal conditions, the user opens life tap (domestic water inlet 132 switches on with outlet 133) and can accomplish the washing to two reverse osmosis filter cores and waste water return line, and this procedure mainly used avoids having no use domestic water needs again after the user has got the drinking water, makes backward flow waste water be detained for a long time in two reverse osmosis filter cores and return line, causes the incrustation scale deposit and influences life's problem.

Example six: see fig. 6. 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, the type of the front filter element 17a can be PP with different forms, activated carbon with different forms, ultrafiltration, nanofiltration, composite filter elements made of the above materials, and the like, and the water outlet flow of the front filter element 17a is less than or equal to 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 preposed 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 booster pump 12 through the first flow limiting valve 14a and then is mixed with the water discharged from the preposed filter element 17a to enter the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the wastewater is realized.

Example seven: see 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.

Example eight: see 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 or equal to 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.

Example nine: see 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 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, and the second waste water outlet 116 and a second waste water direct discharge pipeline Q₂Is communicated with the first waste water direct discharge pipeline Q₂A second flow limiting valve 14b and a second switch valve 18b are arranged on the waste water direct discharge pipeline Q, the second flow limiting valve 14b has the flow limiting function, and the flow direction of the second flow limiting valve 14b flows from the second waste water outlet to the second waste water direct discharge pipeline Q₂The second flow restriction valve 14b has a flow restriction state and a fully open state; a second switching valve 18b is located downstream of the second flow limiting valve 14b, and a flow path between the second switching valve 18b and the second flow limiting valve 14b passes through the second branch passage P₂In communication with the pump inlet 121, a second branch P₂A second check valve 15b is provided, and the flow direction of the second check valve 15b flows from the second waste water port 116 to the pump inlet 121. When the drinking water inlet and the drain port 133 are communicated, the second flow limiting valve 14b maintains a flow limiting state, the second switching valve 18b is closed, and when the drinking water inlet 131 and the drain port 133 are communicated for a time exceeding a first preset time, the second flow limiting valve 14b is opened in a full open state, and the second switching valve 18b is opened. When the domestic water inlet and the drain 133 are connected, the second flow restriction valve 14b is opened in a fully open state, and the second opening/closing valve 18b is closed. When the time that the intelligent water outlet assembly 13 is not opened exceeds a second preset time, the second flow limiting valve 14b is opened in a fully open state, and the second switch valve 18b is opened.

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; 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 waste water sides in two ways, one way 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 second flow limiting valve 14b, and the first reverse osmosis filter element 14a and the second reverse osmosis filter element 14b can be flushed by the first flow limiting valve 14a and the second flow limiting valve 14b due to the fact that the first flow limiting valve 14a and the second flow limiting valve 14b are in a fully open state and the flow rate is large, 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 a living water tap (the living water inlet 132 is communicated with the water outlet 133), a 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 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; meanwhile, the process can flush the wastewater backflow waterway and the two flow limiting valves, the risk that the two flow limiting valves are blocked 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.

Wastewater straight-line procedure 1: when the user got the drinking water, because the waste water backward flow, it can increase along with the increase of water intaking time to go out water TDS, consequently, the design is after the user gets the drinking water time and reaches a definite value (first preset duration preferred 1-5min), start the straight row procedure of waste water (time preferred 5-300s), it is the waste water of discharging while getting water this moment, booster pump 12 keeps starting, keep normal system water state promptly, first ooff valve 18a and second ooff valve 18b open, the waste water that two reverse osmosis filter cores produced is discharged along with two waste water straight row pipelines, it can resume initial level in the play water TDS short time, and it is less to drinking water flux influence.

Wastewater straight-line procedure 2: when the situation that the user does not use the water purifier for a long time (the second preset time is preferably 10min-10h) is monitored, starting a wastewater direct discharging program 2 (the time is preferably 5-300s), and only discharging wastewater at the moment; the booster pump 12 is not started, the first flow limiting valve 14a, the second flow limiting valve 14b, the first switch valve 18a and the second switch valve 18b are opened, tap water flows out of the wastewater side after entering the two reverse osmosis filter elements by means of the pressure of tap water and is directly discharged into the two wastewater straight discharge pipelines, the replacement of water in the two reverse osmosis filter elements and the wastewater pipelines is completed, the two reverse osmosis filter elements, the two flow limiting valves and the two switch valves are prevented from scaling, and the service lives of the two reverse osmosis filter elements, the two flow limiting valves and the two switch valves are prolonged. Under normal conditions, the user opens life tap (domestic water inlet 132 switches on with outlet 133) and can accomplish the washing to two reverse osmosis filter cores and waste water return line, and this procedure mainly used avoids having no use domestic water needs again after the user has got the drinking water, makes backward flow waste water be detained for a long time in two reverse osmosis filter cores and return line, causes the incrustation scale deposit and influences life's problem.

Example ten: see 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 types 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 or equal to 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.

Example eleven: see 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.

Example twelve: see 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 or equal to 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.

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 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 water purifier, characterized by comprising:

a first reverse osmosis filter element having a first water inlet, a first water outlet, and a first waste water outlet;

the first flow limiting valve is arranged on the first wastewater straight-discharge pipeline, has a flow limiting effect and has a flow limiting state and a full-open state;

a first on-off valve provided on the first wastewater straight line and located downstream of the first flow restriction valve, a flow path between the first on-off valve and the first flow restriction valve communicating with the pump inlet through a first branch line;

the intelligent water outlet assembly is electrically connected with the first flow limiting valve, the first switch valve and the booster pump; when the drinking water inlet is communicated with the water outlet, the booster pump is started, and the first switch valve is closed; when the conduction time of the drinking water inlet and the water outlet exceeds a first preset time length, opening the first switch valve;

when the domestic water inlet is communicated with the water outlet, the booster pump is controlled to stop running, the first flow limiting valve is controlled to be opened to a full-open state, and the first switch valve is closed.

2. The water purifier of claim 1, wherein when the intelligent water outlet assembly is not opened for more than a second preset time period, the first flow limiting valve is opened in a fully open state and the first switch valve is opened.

3. The water purifier of claim 2, further comprising a second reverse osmosis filter element disposed in the flow path between the first waste water port and the first flow restriction valve, the second reverse osmosis filter element having a second water inlet in communication with the first waste water port, a second water outlet in communication with the water inlet end of the first flow restriction valve, and a second waste water port in communication with the flow path between the first water outlet and the potable water inlet.

4. The water purifier as recited in claim 2, further comprising a second reverse osmosis filter element having a second water inlet, a second water outlet and a second waste water outlet, said second water inlet being in communication with said pump outlet, said second waste water outlet being in communication with one end of a second waste water straight discharge line, said second waste water straight discharge line being provided with a second flow restriction valve having a flow restriction function, said second flow restriction valve having a flow restriction function, a flow direction from said second waste water outlet to the other end of said second waste water straight discharge line, said second flow restriction valve having a flow restriction state and a fully opened state; the second switch valve is positioned at the downstream of the second flow limiting valve, a flow path between the second switch valve and the second flow limiting valve is communicated with the pump inlet through a second branch, a second one-way valve is arranged on the second branch, and the flow direction of the second one-way valve flows from the second waste water port to the pump inlet; the second water outlet is communicated with a flow path between the first water outlet and the drinking water inlet;

5. The water purifier of any one of claims 2 to 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 water purifier of claim 5, further comprising a post-filter element disposed in a flow path between the first reverse osmosis filter element and the potable water inlet.

7. The water purifier of claim 6, wherein the water yield of the pre-filter element is not more than 8L/min.

8. The water purifier of claim 7, wherein a water inlet valve is provided upstream of the pre-filter element or between the pre-filter element and a location where the pump inlet is located at the intersection of the flow path and the first branch.

9. The water purifier 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 water purifier of any one of claims 2 to 4, further comprising a post-filter disposed on a flow path between the first reverse osmosis filter and the drinking water inlet.