CN114262030A

CN114262030A - Water purifier with double TDS probes

Info

Publication number: CN114262030A
Application number: CN202111649756.5A
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 double TDS probes, which is characterized in that waste water flows back to the front of a first reverse osmosis filter element through a pipeline, is mixed with tap water and then enters the first reverse osmosis filter element again for secondary filtration. The method can greatly reduce the discharge of waste water while ensuring the performance and the service life of the first reverse osmosis filter element; meanwhile, the waste water is connected with an original tap water faucet of a household kitchen of a user, the waste water discharge is completed when the tap water faucet is opened, and meanwhile, the waste water is secondarily utilized, so that the requirement of ecological environment protection is met. In addition, a TDS probe and a waste water direct discharge pipeline are added for directly discharging waste water when the pure water effluent desalination rate is not qualified.

Description

Water purifier with double TDS probes

Technical Field

The invention relates to the technical field of water purifiers, in particular to a water purifier with double TDS probes.

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 main objective of this application is to provide a water purifier with two TDS probes, aims at solving the too much problem that is unfavorable for resource utilization of waste water that current water purifier produced.

In order to achieve the above object, the present invention provides a water purifier with a dual TDS probe, including a booster pump, a first reverse osmosis filter element, a high-pressure switch, and a water outlet assembly connected in sequence, where 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 high-pressure switch, the domestic water inlet is communicated with a waste water port of the first reverse osmosis filter element, the water purifier further includes:

one end of the first wastewater direct discharge pipeline is communicated with a wastewater port of the first reverse osmosis filter element, a first flow limiting valve and a first switch valve are sequentially arranged on the first wastewater direct discharge pipeline along the upstream and downstream directions, and the first flow limiting valve has a flow limiting state and a full-open state; a pipeline between the first flow limiting valve and the first switch valve is communicated with a water inlet of the booster pump through a first branch pipeline, and a first one-way valve which flows towards the water inlet of the booster pump is arranged on the first branch pipeline;

first TDS probe and second TDS probe, respectively correspond set up in the upstream of booster pump with first reverse osmosis filter core with between the drinking water inlet.

The electric control unit is connected with the booster pump, the high-voltage switch, the first flow limiting valve, the first switch valve, the first TDS probe and the second TDS probe;

the electronic control unit is used for turning on the booster pump and turning off the first switch valve when sensing that the high-voltage switch is triggered; and when the salt rejection rate detected by the first TDS probe and the second TDS probe is lower than a preset value, the first switch valve is opened.

In an embodiment, the electronic control unit is further configured to control the first switch valve to open when the TDS value detected by the second TDS probe is greater than a preset value and the triggered signal of the high-voltage switch is terminated.

In one embodiment, the first switch valve is opened when the high voltage switch is not triggered for more than a preset time.

In an embodiment, the TDS system further comprises a second one-way valve disposed upstream of the high voltage switch and between the second TDS probe and the high voltage switch.

In an embodiment, the water outlet assembly includes a drinking water outlet assembly and a domestic water outlet assembly which are independent of each other, the drinking water outlet assembly has the drinking water inlet, the domestic water outlet assembly has the domestic water inlet, and the water outlet includes a drinking water outlet arranged on the drinking water assembly and a domestic water outlet arranged on the domestic water assembly.

In an embodiment, the water purifier with the double TDS probes further comprises a second reverse osmosis filter element, the second reverse osmosis filter element is arranged on a flow path between the waste water outlet of the first reverse osmosis filter element and the first flow limiting valve, the water inlet of the second reverse osmosis filter element is communicated with the waste water outlet of the first reverse osmosis filter element, the waste water outlet of the second reverse osmosis filter element is communicated with the water inlet end of the first flow limiting valve, and the water outlet of the second reverse osmosis filter element is communicated with the flow path between the water outlet of the first reverse osmosis filter element and the second TDS probes.

In one embodiment, the system further comprises a second reverse osmosis filter element, a water inlet of the second reverse osmosis filter element is communicated with an outlet of the booster pump, a waste water outlet of the second reverse osmosis filter element 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, 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 path, and a third one-way valve flowing towards the water inlet of the booster pump is arranged on the second branch path;

the electronic control unit is used for closing the second switch valve when the high-voltage switch is sensed to be triggered; and when the salt rejection rate detected by the first TDS probe and the second TDS probe is lower than a preset value, the second switch valve is opened.

In an embodiment, the electronic control unit is further configured to control the second switch valve to open when the TDS value detected by the second TDS probe is greater than a preset value and the triggered signal of the high-voltage switch is terminated.

In one embodiment, the second switch valve is opened when the time during which the high-voltage switch is not activated exceeds a preset time.

In one embodiment, the water purifier with the double TDS probes further comprises a preposed filter element, the preposed filter element is arranged at the upstream of the booster pump, and the water yield of the preposed filter element (17a) is more than or equal to 8L/min. The water outlet end of the first one-way valve is communicated with the pump outlet.

In one embodiment, the reverse osmosis wastewater backflow waterway system further comprises a preposed filter element, the preposed filter element is arranged at the upstream of the booster pump, and the water yield of the preposed filter element (17a) is less than 8L/min.

In one embodiment, the water purifier with the double TDS probe further comprises a post-filter element disposed in a flow path between the first reverse osmosis filter element and the second one-way valve.

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

In one embodiment, 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.

To the many problems of present water purifier waste water, the application provides a high water-saving intelligent system of reverse osmosis of collocation mechanical faucet, with waste water through the pipeline backward flow to first reverse osmosis filter core before, with the mixed back reentrant first reverse osmosis filter core of running water carry out the secondary filter. The method can greatly reduce the discharge of waste water while ensuring the performance and the service life of the first reverse osmosis filter element; meanwhile, the waste water is connected with the original tap water faucet in the kitchen of the domestic tap user, when the tap water faucet is opened, the waste water discharge is completed, and the waste water is recycled, so that the requirements of ecological environment protection are met. In addition, a TDS probe and a waste water direct discharge pipeline are added for directly discharging waste water when the pure water effluent desalination rate is not qualified.

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 waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 2 is a schematic flow diagram of a second embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 3 is a schematic flow diagram of a waterway system of a water purifier with dual TDS probes according to a third embodiment of the present application;

FIG. 4 is a schematic flow diagram of a fourth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 5 is a schematic flow diagram of a fifth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

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

FIG. 7 is a schematic flow diagram of a waterway system of a water purifier with dual TDS probes according to a seventh embodiment of the present application;

FIG. 8 is a schematic flow diagram of an eighth embodiment of a waterway system in a water purifier with dual TDS probes according to the present application;

FIG. 9 is a schematic flow diagram of a ninth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 10 is a schematic flow diagram of a tenth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 11 is a schematic flow diagram of an eleventh embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 12 is a schematic flow diagram of a twelfth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 13 is a schematic flow diagram of a thirteenth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 14 is a schematic flow diagram of a fourteenth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 15 is a schematic flow diagram of a fifteenth embodiment of a waterway system in a water purifier with dual TDS probes according to the present application;

FIG. 16 is a schematic flow diagram of a sixteenth embodiment of a waterway system of a water purifier with dual TDS probes according to the present application;

FIG. 17 is a schematic flow diagram of a seventeenth embodiment of a waterway system in a water purifier with dual TDS probes according to the present application;

FIG. 18 is a schematic flow diagram of an eighteenth embodiment of a waterway system in a water purifier with dual TDS probes according to the present application;

FIG. 19 is a schematic flow diagram of a nineteenth embodiment of a waterway system in a water purifier with dual TDS probes according to the present application;

FIG. 20 is a schematic flow diagram illustrating a twentieth embodiment of a waterway system of a water purifier according to the present application with dual TDS probes;

FIG. 21 is a schematic flow diagram of a waterway system of a water purifier with dual TDS probes according to a twenty-first embodiment of the present application;

FIG. 22 is a schematic flow diagram of a twenty-second embodiment of a waterway system in a water purifier according to the present application with dual TDS probes;

FIG. 23 is a schematic flow diagram of a twenty-third embodiment of a waterway system in a water purifier with dual TDS probes according to the present application;

FIG. 24 is a schematic diagram of a twenty-fourth embodiment of a waterway system in a water purifier with dual TDS probes according to the present application.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				11a	First reverse osmosis filter element	111	First water inlet
112	The first water outlet	113	First waste water port
				11b	Second reverse osmosis filter element	114	Second water inlet
115	Second water outlet	116	Second waste water port
				12	Booster pump	121	Pump inlet
122	Pump outlet	P₁	First branch
				P₂	Second branch	Q₁	First wastewater direct discharge pipeline
Q₂	Second wastewater direct discharge pipeline	14a	First flow limiting valve
				14b	Second flow limiting valve	15a	First check valve
15b	Second check valve	15c	Third check valve
				16	High-voltage switch	13	Water outlet assembly
131	Drinking water inlet	132	Water inlet for domestic water
				133	Water outlet	13a	Drinking water outlet assembly
13b	Domestic water outlet assembly	131a	Drinking water outlet
				131b	Domestic water outlet	17a	Front filter element
17b	Rear filter element	18a	First switch valve
				18b	Second switch valve	19a	First TDS Probe
19b	Second TDS Probe

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.

Please refer to fig. 1 to 4, the application provides a water purifier with double TDS probes, which comprises a booster pump, a first reverse osmosis filter element, a high-voltage switch and a water outlet assembly, wherein 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 high-voltage switch, the domestic water inlet is communicated with a wastewater outlet of the first reverse osmosis filter element, the water purifier with the double TDS probes further comprises a first wastewater direct discharge pipeline, a first TDS probe, a second TDS probe and an electric control unit, and the first wastewater direct discharge pipeline, the first TDS probe, the second TDS probe and the electric control unit are connected in sequence. One end of a first wastewater direct discharge pipeline is communicated with a wastewater port of the first reverse osmosis filter element, a first flow limiting valve and a first switch valve are sequentially arranged on the first wastewater direct discharge pipeline along the upstream and downstream directions, and the first flow limiting valve has a flow limiting state and a full open state (in the flow limiting state, the flow is small, the flow can be 5% -80% in the full open state, and preferably, the flow can be 10% -30% in the full open state); a pipeline between the first flow limiting valve and the first switch valve is communicated with a water inlet of the booster pump through a first branch pipeline, and a first one-way valve flowing towards the water inlet of the booster pump is arranged on the first branch pipeline. First TDS probe and second TDS probe correspond respectively and set up between the upper reaches of booster pump and first reverse osmosis filter core and drinking water inlet. The electronic control unit is connected with the booster pump, the high-voltage switch, the first flow limiting valve, the first switch valve, the first TDS probe and the second TDS probe.

To the many problems of present water purifier waste water, the application provides a water purifier with probe of two TDS, with waste water through the pipeline backward flow to first reverse osmosis filter core before, with the mixed back reentrant first reverse osmosis filter core of running water carry out the secondary filter. The method can greatly reduce the discharge of waste water while ensuring the performance and the service life of the first reverse osmosis filter element; meanwhile, the waste water is connected with an original tap water faucet in a household kitchen of a life faucet user, when the life faucet is opened, waste water discharge is completed, and meanwhile, the waste water is secondarily utilized, so that the requirement of ecological environment protection is met. In addition, a TDS probe and a waste water direct discharge pipeline are added for directly discharging waste water when the pure water effluent desalination rate is low.

Specifically, the first embodiment: please refer to fig. 1. 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, and the first waste water outlet 113 is communicated with one end of the first waste water direct discharge pipeline Q1. The water outlet assembly 13 has a water outlet 133, a drinking water inlet 131 and a domestic water inlet 132; the drinking water inlet 131 is communicated with the first water outlet 112, and the domestic water inlet 132 is communicated with the first waste water inlet 113. The first flow restriction valve 14a has a flow restriction function and is disposed on the first straight wastewater discharge pipe Q1, and the first flow restriction valve 14a flows from the first wastewater port 113 to the other end of the first straight wastewater discharge pipe Q1. The first on-off valve 18a is provided on the first waste water straight line Q1, and the first on-off valve 18a is located downstream of the first flow restriction valve 14a, and the flow path between the first on-off valve 18a and the first flow restriction valve 14a communicates with the pump inlet 121 through the first branch line P1. The first check valve 15a is provided in the first branch P1, and the flow direction of the first check valve 15a flows from the first waste water port 113 to the pump inlet 121. The high-voltage switch 16 is disposed between the first water outlet 112 and the drinking water inlet 131. An electronic control unit (not shown) for turning on the booster pump 12 and turning off the first switching valve 18a when sensing a signal that the high voltage switch 16 is triggered; and when the salt rejection rates detected by the first TDS sensing probe 19a and the second TDS sensing probe 19b are lower than a preset value, the first on-off valve 18a is opened. The electronic control unit is further configured to control the first on-off valve 18a to open when the TDS value detected by the second TDS probe 19b is greater than the preset value and the triggered signal of the high voltage switch 16 is terminated.

A first TDS probe 19a is arranged at the front end of the first reverse osmosis filter element 11a and the waste water return line and is used for detecting the TDS of the tap water inlet; the rear end of the first reverse osmosis filter element 11a is provided with a second TDS probe 19b for detecting the TDS of the pure water effluent; the first flow limiting valve 14a on the waste water return pipeline is a valve body with a flow limiting function; the first switch valve 18a on the waste water direct discharge pipeline is a valve body with a full-open or full-close function; the second non-return valve 15b, in combination with the high-pressure switch 16, avoids frequent activation: due to the second check valve 15b, when the drinking water tap is closed, water is confined between the second check valve 15b and the tap, the water pressure is kept stable, and the high-pressure switch 16 receives a stable pressure signal and keeps an off state.

The user turns on the drinking water tap (drinking water inlet 131 communicates with outlet 133): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts 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.

Improving the water cut-off phenomenon: the first reverse osmosis filter element 11a is a reverse osmosis process, so a booster pump 12 is required to be added at the front end to make the front pressure of the first reverse osmosis filter element 11a greater than the osmotic pressure. The water cut-off phenomenon is that under normal conditions, because the first flow limiting valve 14a on the waste water pipeline of the first reverse osmosis filter element 11a is not in a closed state, after the water making process is finished, residual water on the water inlet side (same as the waste water side) of the first reverse osmosis filter element 11a is gradually discharged to the waste water pipeline under the pressure in front of the first reverse osmosis filter element 11a, so that the first reverse osmosis filter element 11a cannot be filled with water. When the water purifier is restarted, tap water first fills the first reverse osmosis filter element 11a, and pure water is discharged, so that the phenomenon of water cut-off is caused. This system is because waste water backward flow seals the waste water pipeline, consequently after the system water, and waste water can not discharge under the effect of residual pressure, and the water content keeps in first reverse osmosis filter core 11a, "the water cut-off" phenomenon can be solved, improves user experience and feels.

The user turns on the life tap (the life water inlet 132 communicates with the drain 133): 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 side of the first reverse osmosis filter element 11a in two ways, one way is high in flow rate and is directly discharged through a domestic water faucet, and the other way flows back to the booster pump 12 through the first flow limiting valve 14a (flow limiting and low in flow rate) and then enters the first reverse osmosis filter element 11a again to flush the waste water side of the first reverse osmosis filter element 11a after being mixed with the tap water. Namely, when a user opens the life 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, and the problem of the first cup of water is effectively solved. And because domestic water flow is great, when passing through first reverse osmosis filter core 11a, can wash the pollutant such as the sedimentary incrustation scale of first reverse osmosis filter core 11a waste water side surface, organic matter, reduce first reverse osmosis filter core 11a scale deposit risk, extension first reverse osmosis filter core 11a life. 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 got the drinking water, because the waste water backward flow, the play water TDS can increase along with the increase of water intaking time, consequently, when first TDS probe 19a and second TDS probe 19b detected that the system desalination is less than the setting value (preferred 70-95%), 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 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 play water TDS can resume initial level in the short time, and weak influence to the drinking water flow.

Wastewater straight-line procedure 2: when the user is monitored not to use the water purifier for a long time (preferably 10min-10h), starting a waste water direct discharge program 2 (preferably 5-300 s); 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 first waste water outlet 113 after entering the first reverse osmosis filter element 11a by means of the pressure of the tap water and is directly discharged into the first waste water direct discharge pipeline Q1, the replacement of water in the first reverse osmosis filter element 11a and the first waste water direct discharge pipeline Q1 is completed, 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 service life of the first flow limiting valve 14a are 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 backward flow waste water be detained in first reverse osmosis filter core 11a and waste water return line for a long time, causes the incrustation scale deposit and influences life's problem.

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 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 front effluent flow rate is less than 8L/min. The first TDS probe 19a is either before the wastewater return line, before the pre-filter 17a or after the pre-filter 17 a.

The user turns on the drinking water tap (drinking water inlet 131 communicates with outlet 133): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water is coarsely 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 preposed water to enter the first reverse osmosis filter element 11a again for filtration, and zero discharge of the waste water is realized.

The user turns on the life tap (the life water inlet 132 communicates with the drain 133): 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 side 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 life 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, 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.

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 second check valve 15b and the high-pressure switch 16, and the type of the post-filter 17b may be different forms of activated carbon. The second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user turns on the drinking water tap (drinking water inlet 131 communicates with outlet 133): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts 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: please refer to fig. 4. The embodiment is based on the first embodiment, in which 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 the pure water outlet pipeline of the first reverse osmosis filter element 11a and in front of the second one-way valve 15b and the high-pressure switch 16; 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 preposed effluent flow 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 (drinking water inlet 131 communicates with outlet 133): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts 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 to be mixed with the front effluent to enter the first reverse osmosis filter element 11a again for secondary filtration, so that zero discharge of the wastewater is realized.

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 water purifier with the double TDS probes further comprises a second reverse osmosis filter element 11b, the second reverse osmosis filter element 11b is arranged on a 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 water inlet end of the first flow limiting valve 14a, and the second water outlet 115 is communicated with the flow path between the first water outlet 112 and the second one-way valve 15 b.

The user turns on the drinking water tap (drinking water inlet 131 communicates with outlet 133): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; after tap water flows into the first reverse osmosis filter element 11a, pure water and waste water are divided into one path, the pure water flows to the second one-way valve 15b, the waste water flows into the second reverse osmosis filter element 11b and is subjected to secondary filtration, the pure water flows to the second one-way valve 15b and is converged with a water path from the first water outlet 112, the pure water is discharged through a drinking water faucet for drinking, the waste water is mixed with the tap water before flowing back to the booster pump 12 through the first flow limiting valve 14a and enters the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the waste water is realized.

The user turns on the life tap (the life water inlet 132 communicates with the drain 133): 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 wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out of the wastewater side of the second reverse osmosis filter element 11b in two ways, one way of the tap water is directly discharged through a domestic faucet, the other way of the tap water flows back to the booster pump 12 through the first flow limiting valve 14a (with flow limitation and small flow), and then the tap water is mixed with the tap water and then enters the two reverse osmosis filter elements again to flush the wastewater sides of the two reverse osmosis filter elements. Namely, when a user opens the domestic faucet, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the two reverse osmosis filter elements, and 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.

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 the water TDS, consequently, when first TDS probe 19a and second TDS probe 19b detected that the system desalination is less than the setting value (preferred 70-95%), start the straight row procedure of waste water (preferred 5-300s of time), booster pump 12 keeps starting, keeps normal system water state promptly, first ooff valve 18a opens, the waste water that two reverse osmosis filter core produced is discharged along with the straight row pipeline Q1 of first waste water, can resume initial level in the play water TDS short time, and weak to drinking water flow influence.

Wastewater straight-line procedure 2: when the user is monitored not to use the water purifier for a long time (preferably 10min-10h), starting a waste water direct discharge program 2 (preferably 5-300 s); the booster pump 12 is not started, the first flow limiting valve 14a and the first switch valve 18a are opened, tap water is discharged from the second wastewater outlet 116 after sequentially entering the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b 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 two reverse osmosis filter elements and the first wastewater direct discharge pipeline Q1 is completed, the scaling of the two reverse osmosis filter elements and the first flow limiting valve 14a is prevented, 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 backward flow waste water be detained for a long time in two reverse osmosis filter cores and waste water return line, causes the 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 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 front effluent flow rate is less than 8L/min. The first TDS probe 19a is either before the wastewater return line, before the pre-filter 17a or after the pre-filter 17 a.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water flows into the first reverse osmosis filter element 11a after being roughly filtered by the front filter element 17a, and then is divided into one path of pure water and one path of wastewater, the pure water flows to the second one-way valve 15b, the wastewater flows into the second reverse osmosis filter element 11b and is divided into one path of pure water and one path of wastewater after being secondarily filtered, the pure water flows to the second one-way valve 15b and is converged with a water path from the first water outlet 112, the pure water is discharged through the drinking water faucet for drinking, the wastewater flows back to the booster pump 12 through the first flow limiting valve 14a and then is mixed with the front water to enter the first reverse osmosis filter element 11a again for filtering, and zero discharge of the wastewater is realized.

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 second check valve 15b and the high pressure switch 16, and the type of the post-filter 17b may be different forms of activated carbon. The second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water is divided into a path of pure water and a path of waste water after flowing into the first reverse osmosis filter element 11a, the pure water flows to the second one-way valve 15b, the waste water flows into the second reverse osmosis filter element 11b and is divided into a path of pure water and a path of waste water after secondary filtration, the pure water flows to the second one-way valve 15b and is converged with a water path from the first water outlet 112, the pure water is discharged by a drinking water faucet for drinking after passing through the rear filter element 17b, the waste water is mixed with the tap water before flowing back to the booster pump 12 through the first flow limiting valve 14a and enters the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the waste water is realized.

Example eight: please refer to fig. 8. In the embodiment, on the basis of the fifth embodiment, a front filter element 17a is added at the front end of the booster pump 12, and a rear filter element 17b is added on pure water outlet pipelines of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b and in front of the second one-way valve 15b and the high-pressure switch 16; 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 preposed effluent flow is less than 8L/min; the kind of the post-filter 17b may be activated carbon of different forms. The first TDS probe 19a is arranged in front of the wastewater return line, in front of the pre-filter element 17a or behind the pre-filter element 17 a; the second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water is roughly filtered by the preposed filter element 17a and then flows into the first reverse osmosis filter element 11a, and then is divided into one path of pure water and one path of wastewater, the pure water flows to the second one-way valve 15b, the wastewater flows into the second reverse osmosis filter element 11b and is secondarily filtered, the pure water flows to the second one-way valve 15b and is converged with a water path from the first water outlet 112, the pure water is discharged by a 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 then is mixed with preposed effluent to enter the first reverse osmosis filter element 11a again for secondary filtration, and zero discharge of the wastewater is realized.

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 of the second reverse osmosis filter element 11b is communicated with the outlet of the booster pump 12, the second waste water outlet 116 of the second reverse osmosis filter element 11b is communicated with one end of a second waste water direct discharge pipeline Q2, a second flow limiting valve 14b and a second switch valve 18b are arranged on the second waste water direct discharge pipeline Q2, and the second flow limiting valve 14b has a flow limiting state and a full open state; the second switching valve 18b is located downstream of the second flow restriction valve 14b, a flow path between the second switching valve 18b and the second flow restriction valve 14b communicates with the pump inlet 121 through a second branch P2, and a third check valve 15c that flows toward the inlet 121 of the booster pump 12 is provided in the second branch P2. The electronic control unit is used for closing the second switch valve 18b when sensing a signal that the high-voltage switch 16 is triggered; and when the salt rejection rates detected by the first TDS sensing probe 19a and the second TDS sensing probe 19b are lower than a preset value, the second on-off valve 18b is opened.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the drinking water outlet 131 a): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; running water respectively enters the two reverse osmosis filter elements, is converged after being filtered and is discharged from a drinking faucet for drinking; the wastewater flows back to the booster pump 12 through the two flow limiting valves, is mixed with tap water and then enters the two reverse osmosis filter elements again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the life water outlet 131 b): running water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of the two reverse osmosis filter elements from the waste water sides of the two reverse osmosis filter elements in two paths, one path is converged with a large flow rate and then directly discharged through a domestic water faucet, and the other path is returned to the booster pump 12 through the two flow limiting valves (the flow is limited and the flow is small), mixed with the running water and then enters the two reverse osmosis filter elements again to flush the waste water sides; namely, when a user opens the domestic water tap (the domestic water inlet 132 is communicated with the domestic water outlet 131 b), tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the two reverse osmosis filter elements, and the problem of first cup of water is effectively solved. And because the domestic water flow is 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; simultaneously, the process can flush two waste water direct discharge pipelines and two flow limiting valves, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

Wastewater straight-line procedure 1: when the user got the drinking water, because the waste water backward flow, the play water TDS can increase along with the increase of water intaking time, consequently, when first TDS probe 19a and second TDS probe 19b detected that the system desalination is less than the setting value (preferred 70-95%), 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 second ooff valve 18b open, the waste water that two reverse osmosis filter core produced is discharged along with two waste water straight-line pipelines, the initial level can be resumeed in the play water TDS short time, and it is less to drinking water flux influence.

Wastewater straight-line procedure 2: when the user is monitored not to use the water purifier for a long time (preferably 10min-10h), starting a waste water direct discharge program (preferably 5-300 s); 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 a wastewater direct discharge pipeline, the water replacement of the two reverse osmosis filter elements and the two wastewater backflow direct discharge pipelines is completed, the two reverse osmosis filter elements and the two flow limiting valves are prevented from scaling, and the service lives of the two reverse osmosis filter elements and the two flow limiting valves are prolonged. Under the normal condition, the user opens life tap (life water inlet 132 switches on with life water delivery port 131 b) and can accomplish the washing to two reverse osmosis filter cores and two waste water backward flow direct vent pipelines, and this procedure mainly used avoids having no use life water needs 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 two waste water direct vent pipelines, causes the incrustation scale deposit and influences life's problem.

For this embodiment, it should be noted that, since the flow limiting valve and the check valve are respectively disposed on the first branch P1 and the second branch P2, an adjustment effect is achieved, so that the wastewater recovery rates of the two reverse osmosis filter elements are greatly improved, and the flux of the two reverse osmosis filter elements is greater than 2 times that of a single reverse osmosis filter element under the combined action.

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 preposed effluent flow is less than 8L/min. The first TDS probe 19a is either before the wastewater return line, before the pre-filter 17a or after the pre-filter 17 a.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the drinking water outlet 131 a): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; the tap water is coarsely filtered by the preposed filter element 17a, then respectively enters the two reverse osmosis filter elements, is converged after being filtered, and is discharged by the drinking faucet for drinking; the wastewater flows back to the front of the booster pump 12 through the two flow limiting valves and is mixed with the front effluent to enter the two reverse osmosis filter elements again for secondary filtration, so that zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 is communicated with the life water outlet 131 b): running water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of the two reverse osmosis filter elements from the waste water sides in two paths, one path is converged with a large flow rate and then directly discharged through a domestic water faucet, and the other path is returned to the booster pump 12 through the two flow limiting valves (the flow is limited and the flow is small), mixed with the running water and then enters the two reverse osmosis filter elements again to flush the waste water sides; namely, when a user opens the domestic water tap (the domestic water inlet 132 is communicated with the domestic water outlet 131 b), tap water with lower ion concentration can replace waste water with high ion concentration accumulated on the waste water side of the two reverse osmosis filter elements, and the problem of first cup of water is effectively solved. And because the domestic water flow is 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; simultaneously, the process can flush two waste water direct discharge pipelines and two flow limiting valves, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

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 (preferred 1-5min), start the straight row procedure of waste water (preferred 5-300s of time), 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 core produced is discharged along with the straight row pipeline of waste water, can resume initial level in the play water TDS short time, and it is less to drinking water flux influence.

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 converging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, in front of the second one-way valve 15b and the high-pressure switch 16; the kind of the post-filter 17b may be activated carbon of different forms. The second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the drinking water outlet 131 a): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; running water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pure water pipelines of the two reverse osmosis filter elements are converged after filtration, and the pure water is discharged by a drinking water tap for drinking after passing through the post-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.

Wastewater straight-line procedure 1: when the user got the drinking water, because the waste water backward flow, the play water TDS can increase along with the increase of water intaking time, consequently, when first TDS probe 19a and second TDS probe 19b detected that the system desalination is less than the setting value (preferred 70-95%), 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 second ooff valve 18b open, the waste water that two reverse osmosis filter core produced is discharged along with the straight row pipeline of waste water, the initial level can be resumeed in the play water TDS short time, and it is less to the influence of drinking water flux.

Example twelve: please refer to fig. 12. In the embodiment, on the basis of the ninth embodiment, a front filter element 17a is added at the front end of the booster pump 12, and a rear filter element 17b is added on a pure water outlet converging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b and in front of the second one-way valve 15b and the high-pressure switch 16; 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 preposed effluent flow is less than 8L/min; the kind of the post-filter 17b may be activated carbon of different forms. The first TDS probe 19a is arranged in front of the wastewater return line, in front of the pre-filter element 17a or behind the pre-filter element 17 a; the second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the drinking water outlet 131 a): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water is coarsely filtered by the preposed filter element 17a and then respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and after being filtered, pure water pipelines of the two reverse osmosis filter elements are converged, and after passing through the postposition filter element 17b, the tap water is discharged by a drinking water tap 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 the front effluent, and then enters the two reverse osmosis filter elements again for secondary filtration, so that zero discharge of the wastewater is realized.

Example thirteen: please refer to fig. 13. In the present embodiment, different from the first embodiment, the water outlet assembly 13 includes a drinking water outlet assembly 13a and a domestic water outlet assembly 13b which are independent of each other, the drinking water outlet assembly 13a has a drinking water inlet 131, the domestic water outlet assembly 13b has a domestic water inlet 132, and the water outlet 133 includes a drinking water outlet 131a disposed on the drinking water assembly and a domestic water outlet 131b disposed on the domestic water assembly.

The pure water outlet end of the first reverse osmosis filter element 11a is connected with the end of a drinking water tap, and a second one-way valve 15b and a high-pressure switch 16 are sequentially arranged on a pipeline; the waste water outlet end of the first reverse osmosis filter element 11a is divided into two paths, one path is directly connected with the existing kitchen faucet of a user home, the other path is a waste water return line, waste water can flow back to the front of the booster pump 12 through the first flow limiting valve 14a, and a branch of the waste water return line is a first waste water direct discharge line Q1 and is used for directly discharging the waste water when necessary. A first TDS probe 19a is arranged at the front end of the first reverse osmosis filter element 11a and the waste water return line and is used for detecting the TDS of the tap water inlet; the rear end of the first reverse osmosis filter element 11a is provided with a second TDS probe 19b for detecting the TDS of the pure water effluent; the first flow limiting valve 14a on the waste water return pipeline is a valve body with a flow limiting function; the first switch valve 18a on the first wastewater direct discharge pipeline Q1 is a valve body with a full-open or full-close function; the second non-return valve 15b, in combination with the high-pressure switch 16, avoids frequent activation: due to the second check valve 15b, when the drinking water tap is closed, water is confined between the second check valve 15b and the tap, the water pressure is kept stable, and the high-pressure switch 16 receives a stable pressure signal and keeps an off state.

The user turns on the drinking water tap (the drinking water inlet 131 is communicated with the drinking water outlet 131 a): the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts 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 life water outlet 131 b): 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 wastewater side of the first reverse osmosis filter element 11a in two ways, one way of the tap water is directly discharged through a tap water tap, 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 wastewater side of the first reverse osmosis filter element 11 a; namely, when a user opens the life 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, and the problem of the first cup of water is effectively solved. Moreover, as the flow rate of tap water is large, when the tap water passes through the first reverse osmosis filter element 11a, pollutants such as scale and organic matters deposited on the side surface of the wastewater of the first reverse osmosis filter element 11a can be washed away, 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 tap is opened, the waste water generated and accumulated in the water making process can be discharged through the tap for domestic water, so that the waste water utilization is realized in a real sense.

Example fourteen: please refer to fig. 14. In the embodiment, on the basis of the thirteenth embodiment, a large-flux front-mounted filter element 17a is added at the front end of the booster pump 12, the type of the front-mounted filter element 17a can be PP in different forms, activated carbon in different forms, ultrafiltration, nanofiltration, composite filter elements made of the above materials and the like, the large-flux specification is adopted, the flow rate of front-mounted effluent is more than or equal to 8L/min, and kitchen water is not limited and is equal to tap water. The first TDS probe 19a is either before the wastewater return line, before the pre-filter 17a or after the pre-filter 17 a.

Example fifteen: please refer to fig. 15. In this embodiment, on the basis of the thirteenth embodiment, a post-filter 17b is added to the pure water outlet pipe of the first reverse osmosis filter 11a, before the second check valve 15b and the high-pressure switch 16, and the type of the post-filter 17b may be different forms of activated carbon. The second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

Example sixteen: please refer to fig. 16. In the embodiment, on the basis of the thirteenth embodiment, a large-flux 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 the second one-way valve 15b and the high-pressure switch 16; 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, the large-flux specification is adopted, the preposed effluent flow is more than or equal to 8L/min, and the kitchen water is not limited and is equal to tap water; the kind of the post-filter 17b may be activated carbon of different forms. The first TDS probe 19a is arranged in front of the wastewater return line, in front of the pre-filter element 17a or behind the pre-filter element 17 a; the second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

Example seventeen: please refer to fig. 17. This embodiment adds a second reverse osmosis cartridge 11b to the thirteenth embodiment. The water purifier with the double TDS probes further comprises a second reverse osmosis filter element 11b, the second reverse osmosis filter element 11b is arranged on a 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 water inlet end of the first flow limiting valve 14a, and the second water outlet 115 is communicated with the flow path between the first water outlet 112 and the second one-way valve 15 b.

Example eighteen: please refer to fig. 18. In the embodiment, on the basis of the fifth embodiment, a large-flux front-mounted filter element 17a is added at the front end of the booster pump 12, the type of the front-mounted filter element 17a can be PP in different forms, activated carbon in different forms, ultrafiltration, nanofiltration, composite filter elements made of the materials and the like, the large-flux specification is adopted, the flow rate of front-mounted effluent is more than or equal to 8L/min, and kitchen water is not limited and is equal to tap water. The first TDS probe 19a is either before the wastewater return line, before the pre-filter 17a or after the pre-filter 17 a.

Example nineteenth: please refer to fig. 19. In this embodiment, on the basis of the seventeenth 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, before the second check valve 15b and the high pressure switch 16, and the type of the post-filter element 17b may be activated carbon with different forms. The second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

Example twenty: please refer to fig. 20. In the embodiment, on the basis of seventeen, a large-flux 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 the second one-way valve 15b and the high-pressure switch 16; 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, the large-flux specification is adopted, the preposed effluent flow is more than or equal to 8L/min, and the kitchen water is not limited and is equal to tap water; the kind of the post-filter 17b may be activated carbon of different forms. The first TDS probe 19a is arranged in front of the wastewater return line, in front of the pre-filter element 17a or behind the pre-filter element 17 a; the second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

Example twenty one: please refer to fig. 21. In this embodiment, a second reverse osmosis filter element 11b is added to the thirteenth embodiment, in parallel with the first reverse osmosis filter element 11 a. 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 of the second reverse osmosis filter element 11b is communicated with the outlet of the booster pump 12, the second waste water outlet 116 of the second reverse osmosis filter element 11b is communicated with one end of a second waste water direct discharge pipeline Q2, a second flow limiting valve 14b and a second switch valve 18b are arranged on the second waste water direct discharge pipeline Q2, and the second flow limiting valve 14b has a flow limiting state and a full open state; the second switching valve 18b is located downstream of the second flow restriction valve 14b, a flow path between the second switching valve 18b and the second flow restriction valve 14b communicates with the pump inlet 121 through a second branch P2, and a third check valve 15c flowing toward the pump inlet port 121 of the booster pump 12 is provided in the second branch P2. The electronic control unit is used for closing the second switch valve 18b when sensing a signal that the high-voltage switch 16 is triggered; and when the salt rejection rates detected by the first TDS sensing probe 19a and the second TDS sensing probe 19b are lower than a preset value, the second on-off valve 18b is opened.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; running water respectively enters the two reverse osmosis filter elements, is converged after being filtered and is discharged from a drinking faucet for drinking; the wastewater flows back to the booster pump 12 through the two flow limiting valves, is mixed with tap water and then enters the two reverse osmosis filter elements again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life faucet: running water respectively enters the two reverse osmosis filter elements after passing through the booster pump 12 (the pump is not started) and then respectively flows out of the two reverse osmosis filter elements from the waste water sides in two paths, one path is converged with a large flow rate and then directly discharged through a domestic water faucet, and the other path is returned to the booster pump 12 through the two flow limiting valves (the flow is limited and the flow is small), mixed with the running water and then enters the two reverse osmosis filter elements again to flush the waste water sides; namely, when a user opens the domestic faucet, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the two reverse osmosis filter elements, and 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; simultaneously, the process can flush two waste water direct discharge pipelines and two flow limiting valves, the risk of blockage of the two flow limiting valves due to scaling is reduced, and the service lives of the two reverse osmosis filter elements are further prolonged. When the domestic faucet is opened, the waste water generated and accumulated in the water production process can be discharged through the domestic faucet for domestic water use, and the waste water utilization is realized in the true sense.

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 the water TDS, consequently, when first TDS probe 19a and second TDS probe 19b detected that the system desalination is less than the setting value (preferred 70-95%), first ooff valve 18a and second ooff valve 18b open, the waste water that two reverse osmosis filter core produced is discharged along with two waste water direct vent pipelines, 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 user is monitored not to use the water purifier for a long time (preferably 10min-10h), starting a waste water direct discharge program (preferably 5-300 s); 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 from 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 direct discharge pipelines, the replacement of water in the two reverse osmosis filter elements and the two wastewater backflow direct discharge pipelines is completed, the two reverse osmosis filter elements and the two flow limiting valves are prevented from scaling, and the service lives of the two reverse osmosis filter elements 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 two waste water backward flow straight-line pipelines, 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 in two reverse osmosis filter cores and two waste water straight-line pipelines for a long time, causes the incrustation scale deposit and influences life's problem.

Example twenty two: please refer to fig. 22. In this embodiment, on the basis of twenty-one, a large-flux pre-filter 17a is added at 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, the large-flux specification is adopted, the preposed water outlet flow is more than or equal to 8L/min, the kitchen water is not limited, and the kitchen water is equivalent to tap water. The first TDS probe 19a is either before the wastewater return line, before the pre-filter 17a or after the pre-filter 17 a.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water is coarsely filtered by the preposed filter element 17a and then respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and after filtration, pure water pipelines of the two reverse osmosis filter elements are converged and discharged through a drinking water faucet for drinking; and the wastewater flows back to the front of the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b and is mixed with the water discharged from the large-flux preposed filter element 17a, and then enters the two reverse osmosis filter elements for secondary filtration, so that zero discharge of the wastewater is realized.

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 the water TDS, consequently, when first TDS probe 19a and second TDS probe 19b detected that the system desalination is less than the setting value (preferred 70-95%), start the straight row procedure of waste water (preferred 5-300s of time), booster pump 12 keeps starting, keep normal system water state promptly, first ooff valve 18a opens, 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 influence.

Example twenty two: please refer to fig. 22. In this embodiment, on the basis of seventeenth embodiment, a post-filter element 17b is added on a pure water outlet converging pipeline of a first reverse osmosis filter element 11a and a second reverse osmosis filter element 11b, in front of a second one-way valve 15b and a high-pressure switch 16; the kind of the post-filter 17b may be activated carbon of different forms. The second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; running water respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, pure water pipelines of the two reverse osmosis filter elements are converged after filtration, and the pure water is discharged by a drinking water tap for drinking after passing through the post-filter element 17 b; the wastewater flows back to the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b, is mixed with tap water and then enters the two reverse osmosis filter elements again for secondary filtration, and zero discharge of the wastewater is realized.

The user turns on the life tap (the life water inlet 132 communicates with the drain 133): 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 wastewater side of the first reverse osmosis filter element 11a, enters the second reverse osmosis filter element 11b and then flows out of the wastewater side of the second reverse osmosis filter element 11b in two ways, one way of the tap water is directly discharged through a domestic faucet, the other way of the tap water flows back to the booster pump 12 through the first flow limiting valve 14a (with flow limitation and small flow), and then the tap water is mixed with the tap water and then enters the two reverse osmosis filter elements again to flush the wastewater sides of the two reverse osmosis filter elements. Namely, when a user opens the domestic faucet, tap water with lower ion concentration can replace waste water with high ion concentration accumulated at the waste water side of the two reverse osmosis filter elements, and 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.

Example twenty-four: please refer to fig. 24. In the embodiment, on the basis of seventeen, a large-flux 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 converging pipeline of the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b and in front of the second one-way valve 15b and the high-pressure switch 16; 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, the large-flux specification is adopted, the preposed effluent flow is more than or equal to 8L/min, and the kitchen water is not limited and is equal to tap water; the kind of the post-filter 17b may be activated carbon of different forms. The first TDS probe 19a is arranged in front of the wastewater return line, in front of the pre-filter element 17a or behind the pre-filter element 17 a; the second TDS probe 19b can be either behind the first reverse osmosis filter element 11a, behind the post filter element 17b, the high pressure switch 16, or the second one-way valve 15 b.

The user opens the drinking water tap: the high-voltage switch 16 detects the pressure change, starts the booster pump 12 and starts water production; tap water is coarsely filtered by the preposed filter element 17a and then respectively enters the first reverse osmosis filter element 11a and the second reverse osmosis filter element 11b, and after being filtered, pure water pipelines of the two reverse osmosis filter elements are converged, and after passing through the postposition filter element 17b, the tap water is discharged by a drinking water tap for drinking; and the wastewater flows back to the front of the booster pump 12 through the first flow limiting valve 14a and the second flow limiting valve 14b and is mixed with the water discharged from the large-flux preposed filter element 17a, and then enters the two reverse osmosis filter elements for secondary filtration, so that zero discharge of the wastewater is realized.

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. The utility model provides a water purifier with two TDS probes, includes booster pump, first reverse osmosis filter core, high pressure switch and play water subassembly that links to each other in order, it has outlet port, drinking water inlet and life water inlet to go out the water subassembly, the drinking water inlet with high pressure switch intercommunication, life water inlet and the waste water mouth intercommunication of first reverse osmosis filter core, its characterized in that, the water purifier still includes:

the front filter element and the rear filter element are respectively and correspondingly arranged at the upstream of the booster pump and the downstream of the first reverse osmosis filter element;

one end of the first wastewater direct discharge pipeline is communicated with a wastewater port of the first reverse osmosis filter element, a first flow limiting valve and a first switch valve are sequentially arranged on the first wastewater direct discharge pipeline along the upstream and downstream directions, a pipeline between the first flow limiting valve and the first switch valve is communicated with a water inlet of the booster pump through a first branch pipeline, and a first one-way valve flowing towards the water inlet of the booster pump is arranged on the first branch pipeline;

the first TDS probe and the second TDS probe are respectively and correspondingly arranged between the booster pump and the front filter element and between the rear filter element and the high-voltage switch;

the electronic control unit is used for turning on the booster pump and turning off the first switch valve when sensing a signal that the high-voltage switch is triggered; and when the salt rejection rate that acquires first TDS probe and second TDS probe detect is less than preset salt rejection rate, open first ooff valve.

2. The water purifier with dual TDS probes of claim 1 wherein the electronic control unit is further configured to control the first on-off valve to open when the TDS value sensed by the second TDS probe is greater than a predetermined TDS value and the triggered signal is terminated.

3. The water purifier with dual TDS probes of claim 2, wherein the first on-off valve opens when the high voltage switch is not activated for more than a preset time.

4. The water purifier with dual TDS probes of claim 3, further comprising a second one-way valve disposed upstream of the high voltage switch and between the second TDS probe and the high voltage switch.

5. The water purifier with dual TDS probes of claim 4, wherein the outlet assembly comprises a drinking water outlet assembly and a domestic water outlet assembly independent of each other, the drinking water outlet assembly having the drinking water inlet, the domestic water outlet assembly having the domestic water inlet, the water outlet comprising a drinking water outlet provided at the drinking water assembly and a domestic water outlet provided at the domestic water assembly.

6. The water purifier with dual TDS probes as recited in claim 4, further comprising a second reverse osmosis filter disposed in the flow path between the waste water outlet of the first reverse osmosis filter and the first flow restriction valve, wherein the water inlet of the second reverse osmosis filter is connected to the waste water outlet of the first reverse osmosis filter, the waste water outlet of the second reverse osmosis filter is connected to the water inlet of the first flow restriction valve, and the water outlet of the second reverse osmosis filter is connected to the flow path between the water outlet of the first reverse osmosis filter and the post filter.

7. The water purifier with dual TDS probes of claim 6, wherein the outlet assembly comprises a drinking water outlet assembly and a domestic water outlet assembly independent of each other, the drinking water outlet assembly having the drinking water inlet, the domestic water outlet assembly having the domestic water inlet, the water outlet comprising a drinking water outlet provided at the drinking water assembly and a domestic water outlet provided at the domestic water assembly.

8. The water purifier with the double TDS probes as recited in claim 4, further comprising a second reverse osmosis filter element, wherein the water inlet of the second reverse osmosis filter element is connected to the water outlet of the booster pump, the waste water outlet of the second reverse osmosis filter element is connected to one end of a second waste water straight discharge pipeline, and a second flow limiting valve and a second switch valve are disposed on the second waste water straight discharge pipeline; 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, and a third one-way valve which flows towards the pump inlet is arranged on the second branch;

the electronic control unit is used for closing the second switch valve when the high-voltage switch is sensed to be triggered; and when the salt rejection that acquires first TDS probe and second TDS probe detect is less than preset the salt rejection, open the second ooff valve.

9. The water purifier with dual TDS probes of claim 8 wherein the electronic control unit is further configured to control the second on-off valve to open when the TDS value sensed by the second TDS probe is greater than the predetermined TDS value and the triggered signal is terminated.

10. The water purifier with dual TDS probes of claim 9, wherein the second on-off valve opens when the high voltage switch is not activated for more than a preset time.

11. The water purifier with dual TDS probes of claim 10, wherein the outlet assembly comprises a drinking water outlet assembly and a domestic water outlet assembly independent of each other, the drinking water outlet assembly having the drinking water inlet, the domestic water outlet assembly having the domestic water inlet, the water outlet comprising a drinking water outlet provided at the drinking water assembly and a domestic water outlet provided at the domestic water assembly.

12. The water purifier with dual TDS probes as recited in claim 5, 7 or 11, further comprising a pre-filter disposed upstream of the booster pump, wherein the pre-filter has a water output of 8L/min or more.

13. The water purifier with dual TDS probes of claim 12, wherein a water inlet valve is positioned upstream of the pre-filter element or between the pre-filter element and the intersection of the first branch and the flow path at which the pump inlet is located.

14. The water purifier with the dual TDS probe as claimed in any one of claims 1 to 12, 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.

15. The water purifier with dual TDS probes as recited in claim 1, 6 or 8, further comprising a pre-filter disposed upstream of the booster pump, wherein the pre-filter has a water output of less than 8L/min.

16. The water purifier with dual TDS probes of claim 15, wherein a water inlet valve is positioned upstream of the pre-filter element or between the pre-filter element and the intersection of the first branch and the flow path at which the pump inlet is located.