CN114262024A

CN114262024A - Water purifier with flowmeter and intelligent water outlet assembly

Info

Publication number: CN114262024A
Application number: CN202111649656.2A
Authority: CN
Inventors: 宾倩韵; 孙天厚; 谈菲; 刘梦薇
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 with a flow meter and an intelligent water outlet assembly, which can enable waste water to flow back to a reverse osmosis filter element through a pipeline, be mixed with tap water and then enter the reverse osmosis filter element again for secondary filtration. The method can greatly reduce the discharge of waste water while ensuring the performance and the service life of the reverse osmosis filter element; meanwhile, the wastewater is connected with a domestic tap, and when the tap is opened, the wastewater discharge is completed, and the wastewater is secondarily utilized, so that the ecological environment-friendly requirement is met; in addition, a waste water direct discharging pipeline is also arranged and is used for directly discharging waste water when necessary; this system has the pure water backward flow branch road simultaneously, with the pure water backward flow to reverse osmosis filter core front end, washes and the former raw water of neutralization reverse osmosis filter core, and no residue old water just can drink, and quality of water is stable, provides pure fresh water all the time.

Description

Water purifier with flowmeter and intelligent water outlet assembly

Technical Field

The invention relates to the technical field of water purifiers, in particular to a water purifier with a flow meter and an intelligent water outlet assembly.

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.

After the water purifier does not work for a long time, the concentrated water on the side which is not filtered by the reverse osmosis filter element slowly permeates to the pure water side due to osmotic pressure, and the more the concentrated water permeates, so that the TDS value of the first cup of water is higher under the general condition, and direct drinking is not recommended. In addition, pure water filtered by the reverse osmosis filter element can be retained in the rear filter element for a long time, so that the risk of bacterial breeding of the rear filter element is increased, and the health potential safety hazard exists.

Disclosure of Invention

The invention mainly aims to provide a water purifier with a flow meter and an intelligent water outlet assembly, and aims to solve the problem that the resource utilization is not facilitated due to excessive waste water generated by a waterway system in the conventional water purifier.

In order to achieve the above object, the present invention provides a water purifier with a flow meter and an intelligent water outlet assembly, including a first reverse osmosis filter element and a water outlet assembly, where the first reverse osmosis filter element has a first water inlet, a first water outlet and a first waste water outlet, the water outlet assembly has a water outlet, a drinking water inlet and a domestic water inlet, the drinking water inlet is communicated with the first water outlet, the domestic water inlet is communicated with the first waste water outlet, and the water outlet assembly can monitor whether the drinking water inlet is communicated with the water outlet; it is characterized by also comprising:

a first wastewater straight-discharge pipeline, one end of which is communicated with the pipeline between the first wastewater inlet and the domestic water inlet;

the first flow limiting valve and the first switch valve are arranged on the first waste water straight-discharging pipeline, the first switch valve is positioned at the downstream of the first flow limiting valve, and the first flow limiting valve has a flow limiting function;

the first branch is used for communicating a pipeline between the first flow limiting valve and the first switch valve with the first water inlet, and a first one-way valve with the flow direction facing the first water inlet is arranged on the first branch;

a flow meter disposed on a flow path between the first waste water inlet and the domestic water inlet, the flow meter being configured to monitor whether the domestic water inlet and the water outlet are communicated;

the electric control unit is connected with the water outlet assembly, the first switch valve and the flowmeter; the electric control unit is used for controlling the first switch valve to be opened when the water outlet assembly is monitored to be not opened when the water outlet assembly exceeds a first preset time through the water outlet assembly and the flow meter.

In an embodiment, a booster pump is disposed upstream of the first reverse osmosis filter element, the first branch is communicated with the first reverse osmosis filter element through the booster pump, the booster pump is electrically connected to the electronic control unit, and the electronic control unit is configured to control the operation of the booster pump when a signal indicating that the drinking water inlet is communicated with the water outlet is monitored.

In an embodiment, the water dispenser further comprises a pure water return branch, a flow path between the first water outlet and the drinking water inlet is communicated with one end of the pure water return branch, the other end of the pure water return branch is communicated with the pump inlet, a second one-way valve and a second switch valve are arranged on the pure water return branch, and the second switch valve is located at the upstream of the second one-way valve; the electric control unit is used for controlling the second switch valve to be opened when the water outlet assembly is monitored to be not opened after the water outlet assembly exceeds the first preset time through the water outlet assembly and the flow meter.

In an embodiment, the electronic control unit is further configured to control the first switch valve to open when the accumulated time for the drinking water inlet to communicate with the water outlet exceeds a second preset time.

In an embodiment, the apparatus further comprises 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, a second water outlet, and a second waste water port, the second water inlet being in communication with the first waste water port, the second waste water port being in communication with the pipeline between the first flow restriction valve and the flow meter, the second water outlet being in communication with the potable water inlet.

In one embodiment, the device further comprises a second reverse osmosis filter element, wherein 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 third switch valve are arranged on the second waste water direct discharge pipeline, and the second flow limiting valve has a flow limiting function; the third switch valve is positioned at the downstream of the second flow limiting valve, a flow path between the third switch valve and the second flow limiting valve is communicated with the pump inlet through a second branch, a third one-way valve is arranged on the second branch, and the flow direction of the third one-way valve flows from the second waste water port to the pump inlet; the second water outlet is communicated with the drinking water inlet;

the electric control unit is used for opening the third switch valve when the accumulated conduction time of the drinking water inlet and the water outlet exceeds the second preset value.

In one embodiment, the electric control assembly is used for opening the third on-off valve when the water outlet assembly is monitored to be not opened beyond a first preset time through the water outlet assembly and the flow meter.

In one embodiment, the booster pump further comprises a pre-filter element arranged upstream of the booster pump.

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 system further comprises a post-filter element disposed in the flow path between the first reverse osmosis filter element 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 rear filter element is an activated carbon filter element; the water yield of the preposed filter element is less than 8L/min.

The invention provides a micro wastewater system matched with an intelligent faucet. And (3) returning the wastewater generated by the reverse osmosis filter element in the water purification process to the front of the reverse osmosis filter element through a pipeline, mixing the wastewater with tap water, and then feeding the wastewater into the reverse osmosis filter element again for secondary filtration.

The waste water that the reverse osmosis filter core produced except that before backward flow to the reverse osmosis filter core through the return line, this system still links to each other reverse osmosis filter core waste water with life tap, opens life tap through the user and accomplishes washing reverse osmosis filter core and waste water return line, and waste water discharge supplies the user to live and uses, accomplishes the reutilization to waste water, satisfies ecological environmental protection's requirement. 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 system is provided with a pure water backflow branch at the same time and used for enabling pure water to flow back to the front end of the reverse osmosis filter element, flushing and neutralizing raw water before the reverse osmosis filter element, no residual old water exists, a cup of water can be drunk, the water quality is stable, and pure fresh water is provided all the time.

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 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 wastewater return pipeline and the flow-limiting valve, so that the risk of blockage of the 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 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.

When the situation that a user does not use the water purifier for a long time is monitored, a pure water backflow procedure is started, replacement of original residual old water in the filter element and the waste water pipeline is completed, the problems of first cup of water and old water are solved, water quality is stable, and pure fresh water is provided all the time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic flow diagram of a first embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 2 is a schematic flow diagram of a second embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 3 is a schematic flow diagram of a third embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 4 is a schematic flow diagram of a fourth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 5 is a schematic flow diagram of a fifth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 6 is a schematic flow diagram of a sixth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 7 is a schematic flow diagram of a seventh embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 8 is a schematic flow diagram of an eighth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 9 is a schematic flow diagram of a ninth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 10 is a schematic flow diagram of a tenth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

FIG. 11 is a schematic flow diagram of an eleventh embodiment of a water purifier with a flow meter and an intelligent water outlet assembly according to the present application;

fig. 12 is a schematic flow diagram of a twelfth embodiment of a water purifier with a flow meter and an intelligent water outlet assembly.

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	18c	Third on-off valve
				15a	First check valve	15b	Second check valve
15c	Third check valve	13	Water outlet assembly
				131	Drinking water inlet	132	Water inlet for domestic water
133	Water outlet	17a	Front filter element
				17b	Rear filter element	R	Pure water return branch
19	Flow meter

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a water purifier with a flow meter 19 and an intelligent water outlet assembly 13.

The water purifier with the flow meter 19 and the intelligent water outlet assembly 13 comprises: the reverse osmosis water purifier comprises a first reverse osmosis filter element 11a, a water outlet assembly 13, a first flow limiting valve 14a, a first switch valve 18a, a second switch valve 18b, a first one-way valve 15a, a second one-way valve 15b and a flow meter 19. The first reverse osmosis filter element 11a is provided with a first water inlet 111, a first water outlet 112 and a first waste water inlet 113, the water outlet assembly 13 is provided with a water outlet 133, a drinking water inlet 131 and a domestic water inlet 132, the drinking water inlet 131 is communicated with the first water outlet 112, the domestic water inlet 132 is communicated with the first waste water inlet 113, and the water outlet assembly 13 can monitor whether the drinking water inlet 131 is communicated with the water outlet 133; first wastewater straight-line pipeline Q₁One end of which is communicated with a pipeline between the first waste water inlet 113 and the domestic water inlet 132; a first flow restriction valve 14a and a first switching valve 18a provided in the first wastewater straight line Q₁The first switching valve 18a is located downstream of the first flow limiting valve 14a, and the first flow limiting valve 14a has a flow limiting function (in a flow limiting state, the flow rate is small, and may be 5% to 80% in a fully open state, and preferably, the flow rate may be 10% to 30% in the fully open state); first branch P₁A first branch line P connecting a pipe line between the first flow limiting valve 14a and the first switching valve 18a to the first water inlet 111₁A first check valve 15a is arranged on the first water inlet 111; a flow meter 19 disposed on a flow path between the first waste water inlet 113 and the domestic water inlet 132, the flow meter 19 monitoring whether the domestic water inlet 132 and the drain 133 are connected; the electronic control unit is connected with the water outlet assembly 13, the first switch valve 18a and the flow meter 19; the electric control unit is used for passing through the water outlet groupWhen the member 13 and the flow meter 19 detect that the water outlet assembly 13 is not opened for more than a first preset time (preferably 10min-10h), the first switch valve 18a is controlled to be opened.

A booster pump 12 is arranged at the upstream of the first reverse osmosis filter element 11a, and a first branch P₁The booster pump 12 is communicated with the first reverse osmosis filter element 11a, the booster pump 12 is electrically connected with an electronic control unit, and the electronic control unit is used for controlling the operation of the booster pump 12 when monitoring a signal for communicating the drinking water inlet 131 with the water outlet 133.

The water purifier also comprises a pure water backflow branch R, a flow path between the first water outlet 112 and the drinking water inlet 131 is communicated with one end of the pure water backflow branch R, the other end of the pure water backflow branch R is communicated with the pump inlet 121, a second one-way valve 15b and a second switch valve 18b are arranged on the pure water backflow branch R, and the second switch valve 18b is positioned at the upstream of the second one-way valve 15 b; the electronic control unit is used for controlling the second switch valve 18b to be opened when the water outlet assembly 13 is monitored to be opened after exceeding a first preset time through the water outlet assembly 13 and the flow meter 19.

The electronic control unit is further configured to control the first on-off valve 18a to open when the cumulative time of the conduction between the drinking water inlet 131 and the water outlet 133 exceeds a second preset time (preferably 1-5 min).

The invention provides a micro wastewater system matched with an intelligent faucet. And the wastewater generated by the first reverse osmosis filter element 11a in the water purification process flows back to the front of the first reverse osmosis filter element 11a through a pipeline, is mixed with tap water and then enters the first reverse osmosis filter element 11a again for secondary filtration.

Besides the wastewater generated by the first reverse osmosis filter element 11a flows back to the front of the first reverse osmosis filter element 11a through a return line, the system also connects the wastewater of the first reverse osmosis filter element 11a with a domestic faucet, the domestic faucet is opened by a user to complete the flushing of the first reverse osmosis filter element 11a and the wastewater return line, the wastewater is discharged for the life of the user, the secondary utilization of the wastewater is completed, and the requirement of ecological environmental protection is met. In addition, a first wastewater direct discharge pipeline Q is also arranged₁And can be used for directly discharging waste water when necessary. The system is also provided with a pure water reflux branch R for refluxing pure water to the first reverse osmosis filter element 11a front end, wash and neutralize the former raw water of first reverse osmosis filter core 11a, no residual old water, first glass of water just can drink, and quality of water is stable, provides pure fresh water all the time.

The first embodiment is as follows: please refer to fig. 1. The intelligent double-water faucet is added into the wastewater backflow system, and the intelligent faucet can complete electric control on other components in the system through the change of the opening/closing state of the intelligent faucet. The pure water outlet end of the first reverse osmosis filter element 11a is divided into two paths, one path is directly connected with the drinking water end of the double faucet, and the other path is a pure water backflow branch R used for backflow of the pure water to the front end of the first reverse osmosis filter element 11 a; the effluent of the wastewater is divided into two paths, one path is directly connected with the domestic water end of the double water faucet, and a flowmeter 19 is added on the pipeline; the other path is a waste water return pipeline, waste water can flow back to the front of the booster pump 12 through a first flow limiting valve 14a, and a branch of the waste water return pipeline is a first waste water direct discharge pipeline Q₁And if necessary, the method is used for directly discharging the wastewater. The first flow limiting valve 14a on the waste water return pipeline is a valve body with a flow limiting function; first wastewater straight-line pipeline Q₁The first on-off valve 18a and the second on-off valve 18b in the pure water return branch line R are valve bodies 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 flow meter 19 receives the signal and detects that the user turns on the life water faucet; tap water enters the first reverse osmosis filter element 11a through the booster pump 12 (the pump is not started) and then flows out of the waste water end of the first reverse osmosis filter element 11a in two ways, one way of the tap water is directly discharged through a domestic tap in a large flow rate, and the other way of the tap water flows back to the booster pump 12 through the first flow limiting valve 14a (the flow is limited and small), is mixed with the tap water and then enters the first reverse osmosis filter element 11a again to flush the waste water side of the first reverse osmosis filter element 11 a; namely, when a user opens the living water faucet, tap water with lower ion concentration can replace the waste water with high ion concentration accumulated at 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 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.

Direct discharge procedure of wastewater: when a user takes drinking water, because the waste water flows back, the TDS of the outlet water is increased along with the increase of the water taking time, therefore, after the drinking water taking time of the user reaches a certain value (the second preset time is preferably 1-5min), the waste water direct discharging program is started (the time is preferably 5-300s), the booster pump 12 is started, namely, the normal water making state is kept, the first switch valve 18a is opened, and the waste water generated by the first reverse osmosis filter element 11a is directly discharged along with the first waste water in the pipeline Q₁And the initial level of the effluent TDS can be recovered within a short time, and the influence on the flow of the drinking water is weak.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); when the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, after tap water enters the first reverse osmosis filter element 11a, pure water returns to the booster pump 12 through the pure water return branch R, is mixed with the tap water and then enters the first reverse osmosis filter element 11a again, and raw water in front of the first reverse osmosis filter element 11a is flushed and neutralized; the wastewater flows out from the wastewater end and is directly discharged into a first wastewater direct discharge pipeline Q₁(ii) a The procedure can replace the original residual old water in the first reverse osmosis filter element 11a and the waste water pipeline, solve the problems of first cup of water and old water, and has stable water quality and full timeProviding pure fresh water; meanwhile, the first reverse osmosis filter element 11a and the first flow limiting valve 14a are prevented from scaling, and the service life of the first reverse osmosis filter element 11a and the first flow limiting valve 14a is prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in first reverse osmosis filter core 11a and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem. The pure water backflow program and the domestic water faucet opening program are selected to perform flushing on the system, namely after the process that the user drinks the drinking water is finished, if the flow meter 19 detects that the domestic water faucet is opened by the user within a certain time (preferably 10min-10h), the program is not started; if the flow meter 19 detects that the user does not turn on the life tap within a certain time (preferably 10min-10h), the pure water reflux program is started.

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

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

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); when the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, after tap water enters the first reverse osmosis filter element 11a, pure water returns to the booster pump 12 through the pure water return branch R, is mixed with the tap water and then enters the first reverse osmosis filter element 11a again, and raw water in front of the first reverse osmosis filter element 11a is flushed and neutralized; the wastewater flows out from the wastewater end and is directly discharged into a first wastewater direct discharge pipeline Q₁(ii) a The procedure can be completedThe replacement of original residual old water in the first reverse osmosis filter element 11a and the waste water pipeline solves the problems of first cup of water and old water, the water quality is stable, and pure fresh water is provided all the time; meanwhile, the first reverse osmosis filter element 11a and the first flow limiting valve 14a are prevented from scaling, and the service life of the first reverse osmosis filter element 11a and the first flow limiting valve 14a is prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in first reverse osmosis filter core 11a and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem. The pure water backflow program and the domestic water faucet opening program are selected to perform flushing on the system, namely after the process that the user drinks the drinking water is finished, if the flow meter 19 detects that the domestic water faucet is opened by the user within a certain time (preferably 10min-10h), the program is not started; if the flow meter 19 detects that the user does not turn on the life tap within a certain time (preferably 10min-10h), the pure water reflux program is started.

Example three: please refer to fig. 3. In this embodiment, based on the first embodiment, a post-filter 17b is added to the pure water outlet pipe of the first reverse osmosis filter 11a before the return pipe, 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): 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.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, after tap water enters the first reverse osmosis filter element 11a, pure water passes through the post-positioned filter element 17b, and then returns to the booster pump 12 through the pure water backflow branch R to be mixed with the tap water and then enters the first reverse osmosis filter element 11a again, and raw water in front of the first reverse osmosis filter element 11a is washed and neutralized; the waste water flows out from the waste water endDirectly discharged into a first wastewater direct discharge pipeline Q₁(ii) a The process can complete the replacement of the original residual water in the first reverse osmosis filter element 11a, the post filter element 17b and the waste water pipeline, solve the problems of first cup of water and old water, has stable water quality and provides pure fresh water all the time; meanwhile, the first reverse osmosis filter element 11a and the first flow limiting valve 14a are prevented from scaling, and the service life of the first reverse osmosis filter element 11a and the first flow limiting valve 14a is prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in first reverse osmosis filter core 11a and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

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

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

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, after tap water enters the first reverse osmosis filter element 11a, pure water passes through the post-positioned filter element 17b, and then returns to the booster pump 12 through the pure water backflow branch R to be mixed with the tap water and then enters the first reverse osmosis filter element 11a again, and raw water in front of the first reverse osmosis filter element 11a is washed and neutralized; the waste water flows out from the waste water end directlyIs discharged into a first wastewater straight-discharge pipeline Q₁(ii) a The process can complete the replacement of the original residual water in the first reverse osmosis filter element 11a, the post filter element 17b and the waste water pipeline, solve the problems of first cup of water and old water, has stable water quality and provides pure fresh water all the time; meanwhile, the first reverse osmosis filter element 11a and the first flow limiting valve 14a are prevented from scaling, and the service life of the first reverse osmosis filter element 11a and the first flow limiting valve 14a is prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in first reverse osmosis filter core 11a and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

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 flow path between the first waste water inlet 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 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 pipeline between the first flow limiting valve 14a and the flow meter 19, and the second water outlet 115 is communicated with the drinking water inlet 131. The wastewater outlet of the first reverse osmosis filter element 11a is connected with the water inlet of the second reverse osmosis filter element 11b, the second reverse osmosis filter element 11b carries out secondary filtration on the wastewater of the first reverse osmosis filter element 11a, and the wastewater is mixed with tap water before returning 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.

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 and the water flow from the first water outlet 112 are converged and flow to the drinking water inlet 131, 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 flow meter 19 receives the signal and detects that the user turns on the life water faucet; tap water enters the first reverse osmosis filter element 11a through the booster pump 12 (the pump is not started), then flows out from the waste water end of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b, then flows out from the waste water end of the second reverse osmosis filter element 11b in two paths, one path of the tap water is directly discharged through a domestic faucet, the other path of the tap water flows back to the booster pump 12 through the first flow limiting valve 14a (with flow limitation and small flow), is mixed with the tap water, and then enters the two reverse osmosis filter elements again to flush the waste water sides of the two reverse osmosis filter elements; 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 two reverse osmosis filter elements, 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 two reverse osmosis filter elements, 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.

Pure water reflux procedure: when monitoringStarting a pure water backflow program (preferably for 5-300s) when a user does not turn on a life faucet (detected by the flow meter 19) for a long time (preferably for 10min-10 h); when the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, tap water enters 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, and the pure water is converged with water flow from the first water outlet 112; the converged pure water returns to the booster pump 12 through the pure water return branch R, is mixed with tap water and then enters the two reverse osmosis filter elements again, and the raw water in front of the two reverse osmosis filter elements is washed and neutralized; the wastewater flows out from the wastewater end of the second reverse osmosis filter element 11b and is directly discharged into the first wastewater direct discharge pipeline Q₁(ii) a The process can complete the replacement of original residual water in the two reverse osmosis filter elements and the waste water pipeline, solves the problems of first cup of water and old water, has stable water quality, and provides pure fresh water all the time; meanwhile, the two reverse osmosis filter elements and the first flow limiting valve 14a are prevented from scaling, and the service lives of the two reverse osmosis filter elements and the first flow limiting valve 14a are prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in two reverse osmosis filter cores and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

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

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

Direct discharge procedure of wastewater: when a user takes drinking water, because the waste water flows back, the TDS of the outlet water is increased along with the increase of the water taking time, therefore, after the drinking water taking time of the user reaches a certain value (the second preset time is preferably 1-5min), the waste water direct discharging program is started (the time is preferably 5-300s), the booster pump 12 is kept started, namely, the normal water making state is kept, and the first switch valve 18a is openedThe wastewater generated by the first reverse osmosis filter element 11a is directly discharged along with the first wastewater to the pipeline Q₁And the initial level of the effluent TDS can be recovered within a short time, and the influence on the flow of the drinking water is weak.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); when the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, tap water enters 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, and the pure water is converged with water flow from the first water outlet 112; the converged pure water returns to the booster pump 12 through the pure water return branch R, is mixed with tap water and then enters the two reverse osmosis filter elements again, and the raw water in front of the two reverse osmosis filter elements is washed and neutralized; the wastewater flows out from the wastewater end of the second reverse osmosis filter element 11b and is directly discharged into the first wastewater direct discharge pipeline Q₁(ii) a The process can complete the replacement of original residual water in the two reverse osmosis filter elements and the waste water pipeline, solves the problems of first cup of water and old water, has stable water quality, and provides pure fresh water all the time; meanwhile, the two reverse osmosis filter elements and the first flow limiting valve 14a are prevented from scaling, and the service lives of the two reverse osmosis filter elements and the first flow limiting valve 14a are prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in two reverse osmosis filter cores and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

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 and 11b before the pure water reflux branch R, 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): 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 is converged with water flow from the first water outlet 112, the pure water is discharged by the 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.

Direct discharge procedure of wastewater: when the user takes the drinking water, because the waste water flows back, the TDS of the outlet water is increased along with the increase of the water taking time, therefore, the design is that the drinking water taking time of the user reaches a certain value (the first time)The second preset time is preferably 1-5min), a wastewater direct discharging program is started (the time is preferably 5-300s), the booster pump 12 is kept started, namely, a normal water production state is kept, the first switch valve 18a is opened, and the wastewater generated by the first reverse osmosis filter element 11a is directly discharged to the pipeline Q along with the first wastewater₁And the initial level of the effluent TDS can be recovered within a short time, and the influence on the flow of the drinking water is weak.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, tap water enters 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 is converged with water flow from the first water outlet 112 and flows into the post-positioned filter element 17b, and then the pure water returns to the booster pump 12 through the pure water backflow branch R and is mixed with the tap water to enter the two reverse osmosis filter elements again, and raw water in front of the two reverse osmosis filter elements is washed and neutralized; the wastewater flows out from the wastewater end of the second reverse osmosis filter element 11b and is directly discharged into the first wastewater direct discharge pipeline Q₁(ii) a The process can complete the replacement of the original residual water in the two reverse osmosis filter elements, the post filter element 17b and the waste water pipeline, solve the problems of first cup of water and old water, has stable water quality and provides pure fresh water all the time; meanwhile, the two reverse osmosis filter elements and the first flow limiting valve 14a are prevented from scaling, and the service lives of the two reverse osmosis filter elements and the first flow limiting valve 14a are prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in two reverse osmosis filter cores and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

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

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the water outlet 133): starting the booster pump 12 to start water production; tap water is roughly filtered by the 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 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 is converged with water flow from the first water outlet 112, the pure water is discharged by the drinking water faucet for drinking after passing through the postposition filter element 17b, the wastewater flows back to the booster pump 12 through the first flow limiting valve 14a and 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.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); the booster pump 12 is started, the first switch valve 18a and the second switch valve 18b are opened, tap water enters 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 is converged with water flow from the first water outlet 112 and flows into the post-positioned filter element 17b, and then the pure water returns to the booster pump 12 through the pure water backflow branch R and is mixed with the tap water to enter the two reverse osmosis filter elements again, and raw water in front of the two reverse osmosis filter elements is washed and neutralized; the wastewater flows out from the wastewater end of the second reverse osmosis filter element 11b and is directly discharged into the first wastewater direct discharge pipeline Q₁(ii) a The process can complete the replacement of the original residual water in the two reverse osmosis filter elements, the post filter element 17b and the waste water pipeline, solve the problems of first cup of water and old water, has stable water quality and provides pure fresh water all the time; meanwhile, the two reverse osmosis filter elements and the first flow limiting valve 14a are prevented from scaling, and the service lives of the two reverse osmosis filter elements and the first flow limiting valve 14a are prolonged. Under normal conditions, the user opens life tap and can accomplish the washing to two reverse osmosis filter cores and waste water return line, and this procedure mainly used avoids when usingAfter drinking water is taken by a user, no domestic water needs to be used, so that the residual water is retained in the two reverse osmosis filter elements and the wastewater return pipeline for a long time, and the problem that the first cup of water and scale deposit to influence the service life is caused.

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 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 current limiting valve 14b and a third switch valve 18c are arranged on the valve body, and the second current limiting valve 14b has a current limiting function; a third on-off valve 18c is located downstream of the second flow limiting valve 14b, and a flow path between the third on-off valve 18c and the second flow limiting valve 14b passes through the second branch passage P₂In communication with the pump inlet 121, a second branch P₂A third check valve 15c is arranged on the pump body, and the flow direction of the third check valve 15c flows from the second waste water inlet 116 to the pump inlet 121; the second water outlet 115 communicates with the drinking water inlet 131.

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 flow meter 19 receives the signal and detects that the user turns on the life water faucet; running water respectively enters a first reverse osmosis filter element 11a and a second reverse osmosis filter element 11b after passing through a booster pump 12 (the pump is not started), then respectively flows out of the waste water ends of the two reverse osmosis filter elements in two paths, one path of the running water is converged in a large flow rate and then is directly discharged through a domestic water faucet, and the other path of the running water flows back to the booster pump 12 through a first flow limiting valve 14a and a second flow limiting valve 14b (the flow is limited and small), is mixed with the running water and then enters the two reverse osmosis filter elements again to flush the waste water sides of the two reverse osmosis filter elements; 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 two reverse osmosis filter elements, 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 two reverse osmosis filter elements, 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.

Direct discharge procedure of wastewater: 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 (the preferred 1-5min of second preset time), start the straight row procedure of waste water (the preferred 5-300s of time), booster pump 12 keeps starting, keeps normal system water state promptly, first ooff valve 18a and third ooff valve 18c open, the waste water that two reverse osmosis filter core produced is discharged along with two straight row pipelines of waste water, can resume initial level in the play water TDS short time, and weak to drinking water flow.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); the booster pump 12 is started, the first switch valve 18a, the second switch valve 18b and the third switch valve 18c are opened, tap water respectively enters the two reverse osmosis filter elements, is filtered and then is converged, and is mixed with the tap water before returning to the booster pump 12 through the pure water return branch R to enter the two reverse osmosis filter elements again, so that raw water in front of the two reverse osmosis filter elements is washed and neutralized; the waste water of the two reverse osmosis filter elements is directly discharged into two waste water direct discharge pipelines; the process can complete the replacement of the original residual water in the two reverse osmosis filter element waste water pipelines, solve the problems of first cup of water and old water, has stable water quality and provides pure fresh water all the time; simultaneously, the two reverse osmosis filter cores and the two flow limiting valves are prevented from scaling, and the service lives of the two reverse osmosis filter cores and the two flow limiting valves are prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in two reverse osmosis filter cores and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

For this embodiment, it should be noted that the reason is that the first branch P₁And a second branch P₂The flow limiting valve and the one-way valve are arranged on the reverse osmosis filter, so that the adjusting effect is achieved, the wastewater recovery rate of the two reverse osmosis filter elements is greatly improved, and the flux of the two reverse osmosis filter elements is larger than 2 times that of a single reverse osmosis filter element under the comprehensive effect.

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

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

Example eleven: please refer to fig. 11. In this embodiment, on the basis of the ninth embodiment, a post-filter element 17b is added to a pure water outlet water converging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b before a pure water reflux branch R; 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.

Pure water reflux procedure: when the user is monitored not to open the life tap (detected by the flow meter 19) for a long time (the first preset time is preferably 10min-10h), starting a pure water backflow program (the time is preferably 5-300 s); the booster pump 12 is started, the first switch valve 18a, the second switch valve 18b and the third switch valve 18c are opened, tap water respectively enters the two reverse osmosis filter elements, is filtered, then is converged and flows into the rear filter element 17b, and then is mixed with the tap water before returning to the booster pump 12 through the pure water return branch R to enter the two reverse osmosis filter elements again, so that raw water in front of the two reverse osmosis filter elements is washed and neutralized; the waste water of the two reverse osmosis filter elements is directly discharged into two waste water direct discharge pipelines; the process can complete the replacement of the original residual water in the two reverse osmosis filter elements, the post filter element 17b and the waste water pipeline, solve the problems of first cup of water and old water, has stable water quality and provides pure fresh water all the time; simultaneously, the two reverse osmosis filter cores and the two flow limiting valves are prevented from scaling, and the service lives of the two reverse osmosis filter cores and the two flow limiting valves are prolonged. Under the normal condition, the user opens life tap 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 life water needs again after the user has got the drinking water, makes the residual water be detained in two reverse osmosis filter cores and waste water return line for a long time, causes first glass of water and incrustation scale deposit and influences life's problem.

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

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

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

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A water purifier with a flow meter and an intelligent water outlet assembly comprises a first reverse osmosis filter element and a water outlet assembly, wherein the first reverse osmosis filter element is provided with a first water inlet, a first water outlet and a first waste water outlet, the 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, the domestic water inlet is communicated with the first waste water outlet, and the water outlet assembly can monitor whether the drinking water inlet is communicated with the water outlet or not; it is characterized by also comprising:

2. The water purifier with the flow meter and the intelligent water outlet assembly according to claim 1, wherein a booster pump is disposed upstream of the first reverse osmosis filter element, the first branch is communicated with the first reverse osmosis filter element through the booster pump, the booster pump is electrically connected to the electronic control unit, and the electronic control unit is configured to control the booster pump to operate when a signal indicating that the drinking water inlet is communicated with the water outlet is monitored.

3. The water purifier with the flow meter and the intelligent water outlet assembly according to claim 2, further comprising a pure water return branch, wherein a flow path between the first water outlet and the drinking water inlet is communicated with one end of the pure water return branch, the other end of the pure water return branch is communicated with the pump inlet, a second check valve and a second switch valve are arranged on the pure water return branch, and the second switch valve is located at the upstream of the second check valve; the electric control unit is used for controlling the second switch valve to be opened when the water outlet assembly is monitored to be not opened after the water outlet assembly exceeds the first preset time through the water outlet assembly and the flow meter.

4. The water purifier with a flow meter and an intelligent outlet assembly according to claim 3, wherein the electronic control unit is further configured to control the first on-off valve to open when the cumulative time of the connection between the drinking water inlet and the outlet exceeds a second preset time.

5. The water purifier with a flow meter and an intelligent water outlet assembly according to claim 4, further comprising a second reverse osmosis cartridge disposed in the flow path between the first waste water port and the first flow restriction valve, the second reverse osmosis cartridge having a second water inlet in communication with the first waste water port, a second water outlet in communication with the pipe between the first flow restriction valve and the flow meter, and a second waste water port in communication with the potable water inlet.

6. The water purifier with a flow meter and an intelligent water outlet assembly according to claim 4, further comprising a second reverse osmosis filter element, wherein 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 third on-off valve are arranged on the second waste water direct discharge pipeline, and the second flow limiting valve has a flow limiting function; the third switch valve is positioned at the downstream of the second flow limiting valve, a flow path between the third switch valve and the second flow limiting valve is communicated with the pump inlet through a second branch, a third one-way valve is arranged on the second branch, and the flow direction of the third one-way valve flows from the second waste water port to the pump inlet; the second water outlet is communicated with the drinking water inlet;

7. The water purifier with a flow meter and an intelligent water outlet assembly according to claim 6, wherein the electric control assembly is configured to open the third on/off valve when the water outlet assembly is monitored by the water outlet assembly and the flow meter not to be opened for more than a first preset time.

8. The water purifier with a flow meter and an intelligent water outlet assembly as recited in any one of claims 4 to 7, further comprising a pre-filter element disposed upstream of said booster pump.

9. The water purifier with a flow meter and an intelligent tapping assembly as recited in claim 8, wherein a water inlet valve is disposed between the pre-filter element and a location upstream of the pre-filter element or where the pump inlet is located and the first branch.

10. The water purifier with a flow meter and an intelligent water outlet assembly of claim 8, further comprising a post-filter disposed in the flow path between the first reverse osmosis filter and the potable water inlet.

11. The water purifier with a flow meter and an intelligent water outlet assembly according to claim 10, wherein the pre-filter is a PP filter element, an activated carbon filter element, an ultrafiltration filter element or a nanofiltration filter element; the rear filter element is an activated carbon filter element; the water yield of the preposed filter element is less than 8L/min.

12. The water purifier with a flow meter and an intelligent water outlet assembly according to any one of claims 4 to 7, further comprising a post-filter element disposed in a flow path between the first reverse osmosis filter element and the drinking water inlet.