WO2019213906A1 - Water purification system - Google Patents

Abstract

A water purification system (100), comprising a membrane cartridge (10) connected to a raw water pipe (a), a purified water pipe (b), and a waste water pipe (c); a water inlet valve (15) mounted on the raw water pipe (a); a booster pump (20) mounted on the raw water pipe (a) between the water inlet valve (15) and the membrane cartridge (10); a water intake switch (25) mounted on the purified water pipe (b); a purified water return pipe (d) having an water inlet end communicated with the purified water pipe (b) and a water outlet end communicated with the raw water pipe (a); a purified water return valve (30) mounted on the purified water return pipe (d); a water storage device (35) comprising a first water storage cavity (35a) in communication with purified water and a second water storage cavity (35b) in communication with raw water, the first and second water storage cavities being independent of each other; and a waste water reuse pipe (j) having a water inlet end communicated with the waste water pipe (c) and the other end connected to the raw water pipe (a).

Description

 Water purification system

Technical field

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

Background technique

The problem of drinking water is a matter of great concern to the people. It is an indisputable fact that there are many unhealthy substances in the water. This is also the main reason for the people's awareness of healthy drinking water, and it is also the hot source of the water purification equipment market.

In the existing water purification equipment, the membrane water filter mainly relies on the membrane filter to filter the raw water. However, when the water purification equipment is in the standby state, the raw material water, the waste water and the pure water are simultaneously present in the membrane filter element, wherein the raw water and the waste water are all in the membrane filter core. Before the membrane, the pure water is behind the membrane of the membrane filter, and the total dissolved solids (TDS) values of the raw water and the wastewater are much higher than the TDS value of the pure water. If the water purification equipment is in the standby state for a long time, it will result in The raw water in the membrane filter and the ions in the wastewater diffuse into the pure water, so that the TDS value of the pure water is increased. When the water purifying device takes the pure water next time, the TDS value of the first pure water obtained will be Higher, affecting the user experience.

At present, the effective method for reducing the first cup of water TDS is mainly to rinse the RO membrane with pure water, and flush out the high TDS wastewater in the RO membrane. Flushing with pure water can result in a large amount of water being consumed. The water consumed therein mainly includes two parts: pure water for rinsing; and waste water discharged when pure water for rinsing is prepared.

Summary of the invention

The main object of the present invention is to propose a water purification system having a plurality of cleaning modes, and different cleaning modes can be used in combination, aiming to flush the membrane filter element when the water purifier stops water production, and the membrane filter element The concentrated water of the medium and high TDS is discharged, so that the membrane filter and the waste water valve are immersed in the water of the low TDS, so as to greatly reduce the TDS of the first cup of water prepared when the water purifier is re-watered, and prolong the service life of the membrane filter and the waste water valve. . Moreover, the water purification system has a wastewater reuse pipe, and part of the wastewater flowing out from the membrane filter waste water port can be reused as needed to save more than 60%-80% of the water consumed during the flushing.

The recovered wastewater mainly consists of two parts:

Part I: When the water purifier is normally water, the TDS discharged from the waste water port is very high, usually 2-4 times that of the raw water. It cannot be reused. Forcibly reused will lead to an increase in the purified water TDS. And cause the membrane filter life to decay. When the membrane filter element is washed with pure water, the membrane filter element is filled with pure water of low TDS. When the water purifier is made again, these low TDS water will become concentrated water, and first discharged from the waste water port. Therefore, the TDS of this concentrated water that is first discharged when the water purifier is re-watered is actually lower than the original water and can be reused. In actual recovery, this part of the wastewater will be directly returned to the pump and reused for water production.

Part II: When the membrane filter is initially flushed with pure water, the concentrated water TDS discharged from the waste port is very high, usually several times that of raw water. However, as the rinsing continues, the concentrated water TDS discharged from the wastewater outlet is gradually reduced, and the waste water after the TDS becomes low can also be recovered. In actual recovery, this part of the wastewater can be directly returned to the pump and reused for water production; or this part of the wastewater can be recycled to the second water storage chamber of the water storage device, and the next time the water purifier is first stored in the water storage device When the chamber is filled with pure water, the recovered waste water is extruded into the raw water pipe and reused for water production.

Through the recovery of these two parts of wastewater, the recovered wastewater can usually reach 60-80% of the water consumption in the whole washing process, reducing the waste of water resources.

To achieve the above object, the present invention provides a water purification system comprising:

a membrane filter core having a raw water port communicating with the raw water pipe, a pure water port communicating with the pure water pipe, and a waste water port communicating with the waste water pipe;

An inlet valve installed on the raw water pipe;

a pressurizing device installed on the raw water pipe between the water inlet valve and the membrane filter element;

a water intake switch installed on the pure water pipe;

a pure water return pipe having a water inlet end communicating with a pure water pipe between the membrane filter element and the water intake switch, and a water outlet end communicating with a raw water pipe between the inlet valve and the pressure increasing device, and Connected to the first connection point;

a pure water return valve installed on the pure water return pipe;

A water storage device includes a housing and a movable member movably mounted in the housing, the movable member separating the housing into a plurality of chambers independent of each other. Taking two chambers as an example, the movable member partitions the casing into a first water storage chamber and a second water storage chamber which are independent from each other, and the first water storage chamber passes through the first pipeline and the pure a pure water return pipe connected to the water inlet side of the water return valve, wherein the second water storage chamber is connected to the water source through the second pipeline, and the water source may be raw water entering the raw water pipe;

a wastewater reuse pipeline, one end of the waste water return pipe is connected to the waste water pipe, the other end is connected to the raw water pipe to a third connection point, and the third connection point is located at the raw water inlet and the supercharging device The waste water reuse pipeline is used for returning the waste water of the membrane filter element to the pump raw water pipe or the water storage device for reuse; wherein, if only the first portion of the waste water is recovered, the third connection The point is located on the raw water pipe between the raw water inlet and the pressurizing device; if the first portion and the second portion of the wastewater are simultaneously recovered, the third connecting point needs to be located between the raw water inlet and the inlet valve On the original water pipe.

Optionally, the waste water pipe is provided with a waste water valve and a second water inlet valve, and the waste water valve is located between the second water inlet valve and the waste water port of the membrane filter;

The water inlet end of the wastewater reuse pipeline is in communication with a waste water pipe between the waste water valve and the second water inlet valve.

Optionally, the waste water pipe is provided with a waste water valve and a three-way valve, the water inlet of the three-way valve is connected with the waste water port of the membrane filter, the first water outlet of the three-way valve and the waste water The valve is in communication, and the second water outlet of the three-way valve is in communication with the water inlet end of the wastewater reuse pipeline.

Optionally, the waste water pipe is provided with a waste water valve and a second water inlet valve, and the waste water valve is located between the second water inlet valve and the waste water port of the membrane filter;

The water inlet end of the wastewater reuse pipe is in communication with a waste water pipe between the waste water valve and the waste water port of the membrane filter.

Optionally, the wastewater recycling pipeline is provided with a first restrictor valve and/or a second one-way valve;

The second one-way valve is unidirectionally guided from the waste water port of the membrane filter element to the third connection point.

Optionally, the water purification system further includes:

a waste water return pipe, one end of the waste water return pipe is connected to the waste water pipe, the other end is connected to the raw water pipe to a second connection point, and the second connection point is located on the raw water pipe before the pressurizing device;

a waste water return valve, a waste water return valve is disposed on the waste water return pipe;

Optionally, the water purification system further includes a wastewater proportional valve, and the wastewater proportional valve is disposed on the wastewater return pipe;

Disposed on the waste water return pipe, the wastewater proportional valve and the waste water return valve;

A waste water valve is disposed on the waste water pipe, and an inlet end of the waste water return pipe is connected between the waste water valve and the waste water port.

Optionally, the water purification system further includes a controller, and the controller respectively reflows with the water inlet valve, the pressure increasing device, the water intake switch, the second water inlet valve, and the pure water The valve is electrically connected, and the controller flushes the membrane filter core when receiving the shutdown signal of the water intake switch, the water purification system has multiple cleaning modes, and different cleaning modes can be used in combination:

a water flushing mode: when the controller receives the closing signal of the water intake switch, triggering a control circuit of the water inlet valve, the pressure increasing device, and the pure water return valve to control the water inlet valve Opening, controlling the supercharging device to maintain an operating state, and controlling the pure water return valve to be closed, so that the pure water obtained by the membrane filter core enters the pure water return pipe and the first pipeline The first water storage chamber; the controller triggers the water inlet valve, the pressure increasing device, and the pure water return valve when receiving the signal that the first water storage chamber is loaded with a preset pure water amount Control circuit for controlling the inlet valve to open, controlling the supercharging device to maintain an operating state, and controlling the pure water return valve to be opened, so that the pure water prepared by the membrane filter element is returned to the raw water pipe And mixing the membrane filter after mixing with the raw water in the raw water pipe;

Water-pure water flushing mode: the controller triggers the water inlet valve, the pressurizing device, and the pure water reflux when receiving the signal that the first water storage chamber is loaded with a preset pure water amount a control circuit of the valve to control the inlet valve to close, control the pressurization device to maintain an operating state, and control the pure water return valve to open while passing the second conduit to the second water storage chamber Passing water, so that the pure water prepared by the membrane filter element and the pure water in the first water storage chamber are returned together into the membrane filter element to wash the membrane filter element;

Ordinary pure water flushing mode: the controller triggers the water inlet valve, the boosting device, and the pure water return valve when receiving the signal that the first water storage chamber is loaded with a preset pure water amount Controlling a circuit to control the inlet valve and the boosting device to be closed while controlling the pure water return valve to open while water is passed through the second conduit to the second water storage chamber to cause the first Pure water in a water storage chamber is returned to the membrane cartridge to rinse the membrane cartridge.

Optionally, the water purification system further includes a first pressure detecting device or a first flow detecting device, wherein the first pressure detecting device or the first flow detecting device is mounted on the first pipeline;

The controller is further electrically connected to the first pressure detecting device or the first flow detecting device, and the controller controls the water inlet according to the detection result of the first pressure detecting device or the first flow detecting device The valve, the boosting device, the second inlet valve, and the pure water return valve operate.

Optionally, the water purification system further includes a current detecting device for detecting the boosting device;

The controller is electrically connected to the current detecting device, and the controller controls the water inlet valve, the pressure increasing device, the second water inlet valve and the ground according to the detection result of the current detecting device The pure water return valve works.

Optionally, the water purification system further includes a second pressure detecting device or a second flow detecting device, and the second pressure detecting device or the second flow detecting device is installed between the pressurizing device and the membrane filter Or installed on the waste water pipe between the membrane filter element and the second inlet valve;

The controller is further electrically connected to the second pressure detecting device or the second flow detecting device, and the controller controls the water inlet according to the detection result of the second pressure detecting device or the second flow detecting device The valve, the boosting device, the second inlet valve, and the pure water return valve operate.

Optionally, the water purification system further includes a timing device, wherein the timing device is configured to detect a standby time of the water purification system;

The controller is further electrically connected to the timing device, and the controller controls the water inlet valve, the pressure increasing device, the second water inlet valve, and the pure according to the detection result of the timing device The water return valve operates to flush the membrane cartridge; the controller rinsing the membrane cartridge at intervals according to the timing of the timing device.

Optionally, the water purification system further includes a TDS sensing device, the TDS sensing device is mounted on the waste pipe; the controller is further electrically connected to the TDS sensing device, the controller The operation of the water inlet valve, the pressure increasing device, the second water inlet valve, and the pure water return valve is controlled according to the detection result of the timing device to flush the membrane filter element.

Optionally, the water purification system further includes a third pressure detecting device, wherein the third pressure detecting device is mounted on the pure water pipe;

The water inlet end of the pure water return pipe is in communication with a pure water pipe between the membrane filter element and the third pressure detecting device;

The controller is further electrically connected to the third pressure detecting device, and the controller triggers when the controller detects that the water pressure value detected by the third pressure detecting device is higher than the fourth preset water pressure value. a control circuit of the water inlet valve, the pressure increasing device, the second water inlet valve, and the pure water return valve to control the water inlet valve, the pressure increasing device, and the second water inlet The valve and the pure water return valve operate to flush the membrane cartridge; the controller receives the detection signal that the water pressure value detected by the third pressure detecting device is lower than the fifth preset water pressure value a control circuit for triggering the water inlet valve, the boosting device, the second water inlet valve, and the pure water return valve to control the water inlet valve, the pressure increasing device, and the second The inlet valve and the pure water return valve operate to cause the membrane cartridge to start water production; wherein the fourth predetermined water pressure value is greater than the fifth predetermined water pressure value.

According to the technical solution of the present invention, the water intake switch is closed when the water in the water inlet system is finished, so that the pure water obtained by the membrane filter of the water purification system flows through the pure water return pipe and the first pipe. After the first water storage chamber of the water storage device is filled with a certain amount of pure water in the first water storage chamber, the pure water return valve of the water purification system may be opened to make the membrane filter core The pure water taken is washed through a plurality of washing modes, and a plurality of washing methods can be used in combination;

The arrangement ensures that the problem of ion permeation does not occur in the membrane filter element when the water purifying system is in the standby state, thereby ensuring that the water quality of the first cup of pure water taken by the purifying system next time can be satisfied. Requirements for use; and extend the life of the membrane cartridge.

A variety of ways to rinsing the membrane filter are optional, and different rinsing methods can be used in combination, which greatly increases the optionality of the rinsing method, so that the user can select the most suitable rinsing method according to actual needs, in order to realize the rinsing of the membrane filter. While obtaining a low TDS first cup of water, either increase the flushing effect, or reduce the amount of flushing water; or reduce the volume of the water purifier; or reduce the noise during flushing and increase the life of the pump.

In addition, by increasing the wastewater reuse pipeline (the wastewater reuse pipeline includes the wastewater reuse pipeline and the second one-way valve disposed thereon), the wastewater flowing out of the membrane filter waste port can be returned to the pump beforehand according to demand. The raw water pipe is recycled to the second water storage chamber of the water storage device, so that some of the wastewater can be reused, so our water purification system can save 60-80% of the water consumed by the flushing.

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 embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.

1 is a schematic structural view of an embodiment of a water purification system of the present invention;

Figure 2 is a schematic structural view of the water storage device of Figure 1;

3 is a schematic structural view of another embodiment of a water purification system according to the present invention;

4 is a schematic structural view of still another embodiment of the water purification system of the present invention;

Figure 5 is a schematic structural view of still another embodiment of the water purification system of the present invention;

Fig. 6 is a schematic structural view of still another embodiment of the water purification system of the present invention.

Description of the reference numerals:

Label Name Label Name 100 Water purification system 40 First pressure detecting device 10 Membrane filter 45 First flow detecting device a Raw water pipe b Pure water pipe 55 First check valve c Waste water pipe 80 Second pressure detecting device 15 Inlet valve 85 Second flow detecting device 20 Supercharger 25 Water intake switch 95 Wastewater valve d Pure water return pipe 96 Third pressure detecting device 30 Pure water return valve 97 Fifth check valve 35 Water storage device 98 Pre-filter 351 case 99 Rear filter 352 Moving parts 102 Waste water return valve 35a First water storage chamber h Waste water return pipe 35b Second water storage chamber 105 Second check valve e First line 106 Three-way valve f Second pipeline 104 First restrictor valve 101 Sixth check valve j Wastewater reuse pipeline 103 Wastewater proportional valve 107 Second inlet valve 108 TDS sensing device

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. 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 obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present invention, the directional indication is only used to explain in a certain posture (as shown in the drawing) The relative positional relationship between the components, the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of the "first", "second", etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.

The invention mainly introduces various ways of rinsing the membrane filter core after the water is finished, so as to fully reduce the TDS value in the first cup of water of the water purifier. Wherein, the membrane filter is rinsed, the water purification system has a plurality of cleaning modes, and different cleaning modes can be used in combination. In addition, in the present invention, the wastewater from the membrane filter waste water outlet can be returned to the raw water pipe before the pump or recycled to the second water storage chamber of the water storage device according to the requirement of the wastewater reuse pipeline, so that part of the wastewater can be Reuse, saving 60-80% because of the amount of water consumed by flushing.

The present invention provides a water purification system 100. Referring to FIG. 1, FIG. 1 is a schematic structural view of an embodiment of a water purification system 100 of the present invention. The water purification system 100 includes a membrane cartridge 10, an inlet valve 15, The supercharging device 20, the water intake switch 25, the pure water return valve 30, the water storage device 35 and the like.

The membrane cartridge 10 has a raw water outlet, a pure water outlet, and a waste water port; wherein the raw water outlet of the membrane filter element 10 is in communication with the raw water pipe a (ie, a water pipe or a water pipe connected to the water source); the pureness of the membrane filter element 10 The nozzle is connected to the pure water pipe b for discharging the pure water prepared by the membrane filter element 10; the waste water port of the membrane filter element 10 is connected with the waste water pipe c for the production of the pure water of the membrane filter element 10 The waste water is discharged.

The inlet valve 15 may be a solenoid valve or a manual mechanical valve. The inlet valve 15 is not specifically limited. The inlet valve 15 is mounted on the raw water pipe a. The water purifying system 100 is in an open state when pure water is prepared, and is in a closed state when the water purifying system 100 is in standby.

The boosting device 20 is exemplified by a booster pump, and the booster pump 20 is mounted on the raw water pipe a. Preferably, the booster pump 20 is mounted to the membrane cartridge 10 and the inlet valve 15 On the raw water pipe a, the booster pump 20 not only drives the raw water in the raw water pipe a into the membrane cartridge 10, but also increases the raw water pressure in the raw water pipe a to ensure the inflow. The water pressure of the raw water in the membrane cartridge 10 is sufficiently high, thereby ensuring that the membrane cartridge 10 can normally produce pure water.

Preferably, the booster pump 20 is an inverter booster pump 20. Since the frequency of the variable frequency booster pump 20 is adjustable, it is convenient for the user to adjust the operating frequency of the variable pressure booster pump 20 according to his own needs. When a large amount of pure water needs to be obtained in time, the user can increase the operating frequency of the variable pressure booster pump 20, and at this time, the amount of raw water and water that passes through the variable frequency booster pump 20 per unit time will be relatively large, thereby ensuring entry into the unit within a unit time. The amount of raw water in the membrane cartridge 10 is correspondingly increased, which is beneficial to increase the amount of pure water produced by the membrane cartridge 10 per unit time; when the amount of pure water that the user needs to acquire in a short time is small, the user The operating frequency of the variable-pressure booster pump 20 can be lowered. At this time, the amount of raw water passing through the variable-pressure booster pump 20 per unit time is relatively small, but the raw water entering the membrane filter element 10 can be sufficiently filtered, thereby facilitating the filtration. Improve the utilization of water resources.

The water intake switch 25 may be a solenoid valve, may be a solenoid valve, or may be a manual mechanical valve. The water intake switch 25 is not specifically limited; the water intake switch 25 is mounted on the pure water pipe b. At the water outlet end, it is in an open state when the user takes in pure water, and is in a closed state at the end of the user's water withdrawal. The water intake switch 25 can also be an intelligent water intake switch, and when the water intake switch is turned on or off, the open or close signal is automatically transmitted to the controller.

The pure water return pipe d is used to communicate the pure water pipe b and the raw water pipe a, and the water inlet end thereof communicates with the pure water pipe b between the membrane filter element 10 and the water intake switch 25, The water outlet end communicates with the raw water pipe a between the water inlet valve 15 and the booster pump 20. The pure water return pipe d and the raw water pipe a are connected to the first connection point M;

The pure water return valve 30 is mounted on the pure water pipe b, and the pure water return valve 30 may be a solenoid valve or a manual mechanical valve, and the pure water return valve 30 is not specific thereto. The pure water return valve 30 is used to control the opening or closing of the pure water return pipe d.

a water storage device 35 comprising a housing 351 and a movable member 352 movably mounted in the housing 351, the movable member 352 separating the housing 35 into mutually independent first water storage chambers 35a and a second water storage chamber 35b, the first water storage chamber is connected to a pure water return pipe on the inlet side of the pure water return valve through a first pipeline, and the second water storage chamber is connected to the water source through the second pipeline The water source may be raw water entering the raw water pipe.

The water storage device 35 is used for storing pure water. Referring to FIG. 2 together, the utility model comprises a housing 351 having a cavity and a movable member 352 movably mounted in the housing 351. The movable member 352 will be The inner chamber of the housing 351 is partitioned into a first water storage chamber 35a and a second water storage chamber 35b which are independent of each other, wherein the first water storage chamber 35a passes through the first line e and the pure water return valve 30 is connected to the pure water return pipe d on the water inlet side, and the second water storage chamber 35b is connected to the water source through the second pipe f;

a wastewater reuse pipe, one end of the waste water return pipe is connected to the waste water pipe c, the other end is connected to the raw water pipe to a third connection point P, and the third connection point P is located at the raw water inlet and the The raw water pipe between the booster pumps; the waste water reuse pipe is used to guide the waste water of the membrane filter element to the raw water pipe before the pump or return to the second water storage cavity of the water storage device for reuse; wherein, if only the recovered The first part of the wastewater, the third connection point P is located on the raw water pipe between the raw water inlet and the booster pump; if the first part and the second part of the wastewater are simultaneously recovered, the third connection point P needs to be It is located on the raw water pipe between the raw water inlet and the inlet valve. In this embodiment, by adding a wastewater reuse pipeline, the wastewater reuse pipeline includes a wastewater reuse pipe j and a second one-way valve 105 disposed thereon, and one end of the wastewater reuse pipe j is connected to the waste water pipe c, and another One end is connected with the raw water inlet between the raw water inlet and the booster pump. When the wastewater filtered by the membrane filter element needs to be reused, the second inlet valve is closed, and the wastewater reuse pipeline can flow out from the membrane filter waste port. The waste water is sent to the inlet valve away from the raw water pipe at one end of the booster pump or the second water storage tank of the water storage device according to the demand, so that the waste water can be reused; thereby greatly reducing the amount of water consumed during flushing, and greatly increasing the water. Utilization. Wherein, the second check valve 105 is arranged such that only the waste water flows from the membrane filter to the raw water pipe in the wastewater reuse pipeline, thereby avoiding the direct discharge of the raw water in the raw water pipe; and the first limit can be set on the waste water reuse pipeline. The flow valve 104 allows the flow rate of the wastewater in the wastewater reuse line to be adjusted, which is advantageous for better control of the flow rate of wastewater reuse.

The "wastewater valve" customary in the water purification industry refers to a solenoid valve with small holes. When the solenoid valve of the waste water valve is closed, the waste water can only flow out of the small hole, and the flow rate is limited, and the flow rate depends on the pressure of the water and the size of the small hole. When the solenoid valve of the waste water valve is opened, the waste water valve is fully opened, and the waste water can directly flow out through the electromagnetic valve, and the waste water valve does not have a current limiting function.

The following describes the implementation of several implementations:

First, referring to FIG. 1, the waste water pipe c is provided with a waste water valve 95 and a second water inlet valve 107, and the waste water valve 95 is located at the waste water port of the second water inlet valve 107 and the membrane filter element. The water inlet end of the wastewater reuse line j is in communication with the waste water pipe c between the waste water valve and the second water inlet valve 107.

In this embodiment, when the second water inlet valve 107 is opened, the waste water is directly discharged from the waste water pipe c; when the second water inlet valve 107 is closed, the waste water is returned to the raw water pipe before the pump through the waste water return pipe j or The second water storage chamber of the water storage device.

Secondly, referring to FIG. 3, the waste water pipe c is provided with a waste water valve 95 and a three-way valve 106. The water inlet of the three-way valve 106 communicates with the waste water port of the membrane filter element, and the three-way valve 106 The first water outlet is in communication with the waste water valve 95, and the second water outlet of the three-way valve 106 is in communication with the water inlet end of the wastewater reuse line j.

When the first water outlet of the three-way valve 106 is opened and the second water outlet is closed, the waste water is discharged from the waste water pipe c; when the first water outlet of the three-way valve 106 is closed, and the second water outlet is opened, the waste water passes through the waste water. The return line j is returned to the raw water pipe in front of the pump or the second water storage chamber of the water storage device.

Third, referring to FIG. 4, the water purification system according to claim 1, wherein the waste water pipe c is provided with a waste water valve 95 and a second water inlet valve 107, and the waste water valve 95 is located at the The second inlet valve 107 and the waste port of the membrane cartridge are connected; the inlet end of the wastewater reuse conduit is in communication with the waste pipe c between the wastegate valve 95 and the waste water port of the membrane cartridge.

In this embodiment, when the second water inlet valve 107 is opened, a part of the wastewater is directly discharged from the waste water pipe c, and another part of the waste water is returned to the raw water pipe before the pump through the waste water return pipe j; when the second water inlet When the valve 107 is closed, the waste water is returned to the raw water pipe before the pump or the second water storage chamber of the water storage device through the waste water return pipe j.

Fourth, referring to Figure 5, the first case is combined with the waste water return pipe h in the following embodiment;

The fifth, parameter Figure 6, the second case is combined with the wastewater return line h in the following examples. See the wastewater recirculation scheme below for details.

It should be noted that, in the above embodiment, a second check valve 105 may be disposed on the wastewater reuse pipeline; the second check valve 105 is connected to the third connection from the waste water outlet of the membrane filter. Point P is a single guide. This embodiment can be combined with other embodiments in this application. It is also possible to provide a first restriction valve 104 on the wastewater reuse line to further regulate the reused wastewater flow.

Of course, in some embodiments, the water purification system further includes a waste water return pipe, one end of the waste water return pipe is connected to the waste water pipe, and the other end is connected to the raw water pipe to the second connection point N, the second The connection point N is located on the raw water pipe in front of the booster pump; the waste water return valve is disposed on the waste water return pipe.

a waste water return pipe h, one end of the waste water return pipe h is connected to the waste water pipe, the other end is connected to the raw water pipe to a second connection point N, and the second connection point N is located before the booster pump In the raw water pipe; the waste water return pipe h is used to connect the waste water pipe and the raw water pipe, so that when the water is normal, part of the waste water can be returned to the booster pump, the actual recovery rate of the water purification system is lowered, and the high recovery rate is operated to operate the membrane filter element. Life expectancy.

The wastewater return valve 102 and the sixth check valve 101, the waste water return valve 102 and the sixth check valve 101 are both disposed on the waste water return pipe h; the waste water return valve 102 may be a solenoid valve or a mechanical valve The waste water return valve 102 is not specifically limited herein, and the waste water return valve 102 is installed on the waste water return pipe h to control whether the waste water flows back. It is in an open or closed state when the water purification system produces pure water, which is in a closed state when the water purification system is in a flushing phase. The sixth check valve 101 only allows water to flow from the waste pipe to the raw water pipe, and does not allow water to flow from the raw water pipe to the waste pipe.

It should be noted that the movable member 352 may be a diaphragm, a piston or other structure capable of being moved or deformed under the impact of a fluid, which is not enumerated here, since the movable member 352 is movably mounted on The inside of the housing 351 allows the movable member 352 to move when a pressure difference between the water pressure in the first water storage chamber 35a and the water pressure in the second water storage chamber 35b occurs. Thereby, one of the first water storage chamber 35a and the second water storage chamber 35b having a high water pressure causes the water in one of the water pressures to be squeezed out.

When the user needs to take the pure water, the water intake switch 25 and the water inlet valve 15 are simultaneously opened, the pure water return valve 30 is kept closed, and the boost pump 20 is turned on, the pressurization The pump 20 drives the raw water in the raw water pipe a into the membrane cartridge 10, and the membrane cartridge 10 filters the raw water to produce pure water, and also generates waste water, and the pure water flows out through the pure water pipe b for the user. Intake, waste water is discharged through the waste water pipe c; or a part of the waste water is discharged through the waste water pipe c, and another portion is returned to the front of the booster pump through the waste water return pipe.

When the user takes the water to end, the water intake switch 25 is closed, the water inlet valve 15 is kept open, the pure water return valve 30 is kept kept closed, and the booster pump 20 is kept open. So that the membrane cartridge 10 can continue to produce pure water, and the pure water produced by the membrane cartridge 10 enters the first water storage chamber 35a through the pure water return pipe d and the first conduit e When the first water storage chamber 35a is provided with a preset amount of pure water, the water inlet valve 15, the booster pump 20, the pure water return valve 55, and the first portion are controlled according to a preset flush mode. The operation of the two water inlet valve 107 simultaneously passes water into the second water storage chamber 35b through the second conduit f, so that pure water in the first water storage chamber 35a flows into the membrane cartridge 10 The membrane filter element 10 is flushed, so that the raw water and waste water existing in the membrane cartridge 10 are flushed out by pure water, so that only pure water exists in the membrane cartridge 10, thereby avoiding the membrane filter element. The problem of ion diffusion occurs within 10.

It should be noted that when the membrane cartridge 10 is flushed, various flushing modes can be performed, and the pump and valve opening/closing in different flushing modes are as follows. And different flushing modes can be combined with each other when flushing. For example, after flushing with mode 4 for a while, switch to mode 3 for flushing.

Flush mode and working status table of each waterway component

Booster pump First inlet valve Wastewater valve Pure water return valve Second inlet valve Flushing method Mode 1 open open Open open On/off (recycling) Raw water rinse - make a small amount of pure water Mode 2 turn off Mixed water rinse - normal pure water Mode 3 turn off Open Pure water rinse - make a small amount of pure water Mode 4 turn off Raw water rinse - normal pure water Mode 5 turn off Open Open open Raw water rinse - quick rinse Mode 6 turn off Raw water rinse - low speed rinse Mode 7 turn off Open Pure water rinse - quick rinse Mode 8 turn off Pure water rinse - low speed rinse

In the following, the flush mode 4 is taken as an example to introduce the single mode flushing process of the water purification system.

Flushing mode 4: When mode 4 flushing is performed on the membrane cartridge 10, the inlet valve 15 is in a closed state, and the booster pump 20 is in an open state, which ensures that the membrane cartridge 10 is flushed with pure water. The membrane cartridge 10 is also capable of maintaining pure water, and the pure water prepared by the membrane cartridge 10 and the pure water in the first water storage chamber 35a are returned together through the pure water return pipe d. In the membrane cartridge 10, a part of the membrane cartridge 10 is purified into pure water, and is again returned to the membrane cartridge 10 through the pure water return pipe d to the membrane cartridge 10. Flushing is performed again, and another portion of pure water forms waste water and is discharged from the waste water pipe c together with the TDS in the membrane cartridge 10; the pure water in the first water storage chamber 35a of the water storage device 35 is described The water in the second water storage chamber 35b is extruded and flows into the membrane cartridge 10 through the pure water return pipe d, thereby effectively replenishing the wastewater discharged through the waste pipe c, thereby ensuring the entire purified water. When the system 100 is rinsing the membrane cartridge 10, it also ensures that the system The booster pump 20 and the membrane cartridge 10 can run well, the booster pump 20 to avoid the water shortage and problems caused by an abnormal operation of the membrane cartridge 10 occurs. During the rinsing process, the opening/closing of the second inlet valve may be controlled according to the rinsing time or the signal such as the wastewater TDS to recover the concentrated water discharged from the effluent port during the partial rinsing to the second water storage chamber of the water storage device.

In the following, the combined flushing process of the water purification system will be described by taking the flush mode 4-flush mode 3 combined flush mode as an example.

Flush mode 4 - Flush mode 3 Combined flush mode: Mode 4 flushing is first performed on the membrane cartridge 10, the inlet valve 15 is in a closed state, and the booster pump 20 is in an open state, which ensures the membrane cartridge 10, when rinsing with pure water, the membrane cartridge 10 is also capable of maintaining pure water, pure water prepared by the membrane cartridge 10, and pure water in the first water storage chamber 35a (in the second reservoir) The raw water extrusion action in the water chamber 35b and the pumping force of the booster pump are simultaneously returned to the membrane cartridge 10 through the pure water return pipe d, and the membrane cartridge 10 is washed. After rinsing for a period of time, the system receives the mode switching signal (flush time, flow sensor signal, waste water TDS), switches the flush mode to mode 3, at which time the waste valve is opened, and the remaining pure in the first water storage chamber 35a The water rapidly flows into the membrane filter element under the extrusion action of the water in the second water storage chamber 35b and the suction force of the booster pump, and the concentrated water in the membrane filter element is flushed out. After the system receives the flush end signal (flush time, pump current signal, flow sensor signal, wastewater TDS, high voltage switch), the system enters the standby state. In this way, it is ensured that the problem of ion penetration does not occur in the membrane cartridge 10 when the water purification system 100 is in the standby state, thereby ensuring the first cup of pure water taken by the water purification system 100 next time. The water quality can meet the needs for use.

It should be noted that after the water purification system 100 is finished, the washing mode is selected according to the raw water quality, the service life of the booster pump and the membrane filter, the washing effect of the consumer, the cleaning time and the noise. The degree of acceptance or other factors are determined, so I will not list them here.

Considering that when the user uses the water purification system 100, it is necessary to control the opening or closing of different components of the water purification system 100 at different time periods, which brings inconvenience to the user. In view of this, the net of the present invention The water system 100 further includes a controller (not shown), which may be a single chip microcomputer or a PWM controller, the controller and the water inlet valve 15, the booster pump 20, and the water intake in the water purification system 100, respectively. The switch 25, the second water inlet valve 107 and the pure water return valve 30 are electrically connected, and the controller controls the corresponding components of the water purification system 100 to operate when the water purification system 100 is in different states.

When the user needs to take water, the water intake switch 25 is opened, and when the controller receives the signal that the water intake switch 25 is open, the control circuit of the water inlet valve 15 and the booster pump 20 is triggered to control The inlet valve 15 and the booster pump 20 are opened, so that raw water enters the membrane cartridge 10 through the raw water pipe a and is filtered, and the pure water prepared by the membrane cartridge 10 passes through the pure The water pipe b is discharged for the user to take, and the waste water generated by the membrane filter 10 to obtain pure water is discharged through the waste water pipe c (Fig. 1); or a part of the generated waste water is discharged through the waste water pipe c; Another part of the wastewater is returned to the front of the booster pump through the wastewater reuse line (Figure 3) or the wastewater return line (Figures 4, 5).

When the water intake of the user is finished, the water intake switch 25 is turned off, and when the controller receives the signal that the water intake switch 25 is closed, the controller triggers the water inlet valve 15 and the booster pump 20, a second inlet valve 107 and a control circuit of the pure water return valve 30 to control the inlet valve 15 and the booster pump 20 to remain open while controlling the pure water return valve 30 to remain closed At this time, the pure water prepared by the membrane cartridge 10 flows into the first water storage chamber 35a of the water storage device 35 through the pure water return pipe d and the first conduit e, and the The water in the second water storage chamber 35b is extruded. When the controller receives a signal that the first water storage chamber 35a is equipped with a preset amount of pure water (which can be detected by a water level detecting device, a flow meter or the like, or a booster pump current detecting device), the control The device triggers the control circuit of the pure water return valve 30 to open and close the pump and valve for cleaning according to a preset cleaning mode. Taking the cleaning mode 7/8 as an example, when the controller receives the signal that the water intake switch 25 is closed, the controller triggers the water inlet valve 15, the boost pump 20, and the second water inlet valve 107. And a control circuit of the pure water return valve 30 to control the inlet valve 15 to remain open, to control the pure water return valve 30 to remain in a closed state, and to control the booster pump 20 to remain open, The membrane cartridge 10 is capable of continuously producing pure water, and the pure water prepared by the membrane cartridge 10 enters the first water storage chamber 35a through the pure water return pipe d and the first conduit e When the controller receives the signal that the first water storage chamber 35a is equipped with a preset amount of pure water, the controller triggers a control circuit of the water inlet valve 15 and the pure water return valve 30, To control the inlet valve 15 and the booster pump to be closed, the pure water return valve 30 is controlled to open, the waste water valve is opened/closed, and water is supplied to the second water storage chamber 35b and the first water storage chamber is opened. The pure water in 35a is extruded, at this time, the pure water discharged from the first water storage chamber 35a flows into the membrane cartridge 10 and The membrane cartridge 10 is subjected to ordinary pure water rinsing, so that the raw water and waste water existing in the membrane cartridge 10 are flushed out by pure water, so that only pure water exists in the membrane cartridge 10, thereby avoiding the The problem of ion diffusion occurs in the membrane cartridge 10.

Of course, when the user finishes the water withdrawal, the controller may also trigger a control circuit of each component (such as the water inlet valve 15, the booster pump 20, the pure water return valve 30, etc.) in the water purification system 100. The membrane cartridge 10 is first subjected to other mode cleaning or combined mode cleaning. It is not introduced here one by one. .

In order to facilitate confirmation of whether a predetermined amount of pure water is loaded into the first water storage chamber 35a of the water storage device 35, in an embodiment of the present invention, referring to FIG. 1, the water purification system 100 further includes a pressure detecting device 40 or a first flow detecting device 45 or a boost pump current detecting device or a TDS sensor 108, the first pressure detecting device 40 or the first flow detecting device 45 being mounted to the first conduit e The controller is further electrically connected to the first pressure detecting device 40 or the first flow detecting device 45, and the controller is according to the first pressure detecting device 40, the first flow detecting device 45 or a detection result of the booster pump current detecting device triggers a control circuit of the water inlet valve 15, the booster pump 20, the pure water return valve 30, and the second water inlet valve 107 to control the advancement The water valve 15, the booster pump 20, the pure water return valve 30, and the second water inlet valve 107 operate.

When the first pressure detecting device 40 is mounted on the first pipe e or the pure water return pipe d, when the first water storage chamber 35a of the water storage device 35 is filled with pure water, the first pipe The water pressure on the e is gradually increased. When the preset water quantity is filled in the first water storage chamber 35a of the water storage device 35, the water pressure in the first pipe e also reaches the first pre-charge. The water pressure is set. At this time, after the controller receives the detection signal that the water pressure value detected by the first pressure detecting device 40 reaches the first preset water pressure, the water inlet valve 15 is triggered. a pump 20, the second inlet valve 107, and a control circuit of the pure water return valve 30 to flush the membrane cartridge 10; when the membrane cartridge 10 is flushed, the first reservoir The pure water in the chamber 35a is returned to the membrane cartridge 10 through the pure water return pipe d, so that the pure water in the first water storage chamber 35a is gradually reduced, thereby making the first tube The water pressure in the road e will also gradually decrease, when the controller receives the first pressure detecting device 40 detecting that the water pressure in the first pipe e reaches the second When the water pressure is set (the second preset water pressure is lower than the first preset water pressure setting), the controller triggers the water inlet valve 15, the boost pump 20, and the second water inlet valve 107 And the control circuit of the pure water return valve 30 stops rinsing the membrane cartridge 10.

When the first flow detecting device 45 is mounted on the first pipe e, when the first water storage chamber 35 of the water storage device 35 is filled with pure water, the time passing through the first pipe e is over time. Increasingly, when the first flow detecting device 45 detects that a predetermined amount of pure water is loaded into the first water storage chamber 35a, the cleaning mode is triggered; when the first flow detecting device 45 detects the The controller triggers the water inlet valve 15, the booster pump 20, the second inlet valve 107, and the pure water return valve when a predetermined amount of pure water is discharged in the first water storage chamber 35a. The control circuit of 30 stops flushing the membrane cartridge 10.

When the water purification system is equipped with a booster pump current detecting device, when the first water storage chamber 35a of the water storage device 35 is filled with pure water, the booster pump current will gradually increase when the storage When the preset water quantity is filled in the first water storage chamber 35a of the water device 35, the booster pump current also reaches a first preset current value, and at this time, the controller receives the booster pump current. After the current value detected by the detecting device reaches the first preset current value, the control circuit of the water inlet valve 15, the boost pump 20, the second water inlet valve 107, and the pure water return valve 30 is triggered. Flushing the membrane cartridge 10; when the membrane cartridge 10 is washed, the pure water in the first water storage chamber 35a is returned to the membrane cartridge 10 through the pure water return pipe d, In this way, the pure water in the first water storage chamber 35a is gradually reduced, and the booster pump gradually loses water and idling, so that the current of the booster pump is gradually decreased, when the controller receives the The booster pump current detecting device detects that the booster pump current reaches a second preset current value (second preset current) When the current is lower than the first preset current, the controller triggers the control circuit of the water inlet valve 15, the boost pump 20, the second water inlet valve 107, and the pure water return valve 30 to stop The membrane cartridge 10 is rinsed.

Further, the water purification system 100 further includes a first one-way valve 55, which is installed on the pure water return pipe d on the water outlet side of the pure water return valve 30, and is disposed on the one hand. When the normal water production can be avoided, the raw water enters the first water storage chamber 35a of the water storage device 35 through the pure water return pipe d; on the other hand, the raw water in the raw water pipe a can be effectively avoided. The pure water reflux in the pure water return pipe d causes interference, thereby facilitating the flow of pure water in the first water storage chamber 35a and the pure water pipe b into the raw water pipe through the pure water return pipe d. Inside.

In order to facilitate controlling the length of time for flushing the membrane cartridge 10, the water purification system 100 further includes a second pressure detecting device 80 that is installed between the booster pump 20 and the membrane cartridge 10 or wastewater. The pipe is connected between the waste water port of the membrane cartridge 10 and the second water inlet valve 107; the controller is also electrically connected to the second pressure detecting device 80 or the second flow detecting device 85, wherein the controller is in the When the pressure value detected by the second pressure detecting device 80 is lower than the third preset water pressure value, the water inlet valve 15, the boost pump 20, the second water inlet valve 107, and the pure water are triggered. The control circuit of the return valve 30 is operative to stop the rinsing of the membrane cartridge 10.

In order to facilitate controlling the length of time for flushing the membrane cartridge 10, the water purification system 100 further includes a TDS sensing device 108 mounted on the waste water pipe c when the TDS sensing device 108 detects When the TDS of the wastewater is lower than the preset first TDS value, the rinsing of the membrane cartridge 10 is stopped.

In addition, when the combined flushing mode is used, the first flow detecting device 45 detects that the amount of pure water discharged from the first water storage chamber of the water storage device reaches a preset amount; the TDS sensing device 108 detects that the TDS of the wastewater is lower than the preset second When the TDS value is used; or when the timer detects that the flushing time has reached the preset time, the flush mode is switched.

Obviously, the water purification system 100 can also control the washing time of the membrane cartridge 10 by other detecting devices. For example, the water purifying system 100 can further include a timer electrically connected to the controller ( Not shown), the timer is used to detect the inflow time of the second water storage chamber 35b, since the pure water return valve 30 is only opened when the membrane cartridge 10 is flushed, that is, The duration of the opening of the pure water return valve 30 is equivalent to the length of the water entering the second water storage chamber 35b. Therefore, the timer can determine the second storage by detecting the opening time of the pure water return valve 30. The water inlet time of the water chamber 35b, that is, when the controller receives the timer detecting that the pure water return valve 30 is open for a preset length of time, the controller triggers the water inlet valve 15, The booster pump 20, the second inlet valve 107, and the control circuit of the pure water return valve 30 stop rinsing the membrane cartridge 10.

In order to avoid the phenomenon that ions of the membrane cartridge 10 are diffused in the membrane cartridge 10 when the standby time of the water purification system 100 is too long, the water purification system 100 is further provided with a timing device (not shown) for detecting The water purifying system 100 is in standby time, the controller is electrically connected to the timing device, and the controller triggers the water inlet valve 15 and the boosting pump 20 according to the detection result of the timing device. The second inlet valve 107 and the control circuit of the pure water return valve 30 to control the inlet valve 15, the booster pump 20, the second inlet valve 107, and the pure water reflux Valve 30 operates to flush the membrane cartridge 10.

Since the boosting pump 20 is in a closed state when the water purifying system 100 is in a standby state, the boosting pump 20 is in an open state when the water purifying system 100 is in a water producing state or a flushing state, The timing device may determine the standby duration of the water purification system 100 by detecting the standby time of the boost pump 20. When the controller receives the signal that the timing device detects that the standby time of the booster pump 20 reaches the preset standby duration, the controller triggers the water inlet valve 15, the booster pump 20, The second inlet valve 107 and the control circuit of the pure water return valve 30 are used to flush the membrane cartridge 10. In this way, it is ensured that the membrane cartridge 10 of the water purification system 100 is cleaned once every once time, thus ensuring that ion diffusion does not occur inside the membrane cartridge 10, and the membrane cartridge is also ensured. The freshness of the water within 10.

Of course, it is also possible to set a cleaning switch on the controller, the user inputs a cleaning instruction through the cleaning switch, and the controller triggers the water inlet valve 15 and the boosting pump 20 after receiving the cleaning instruction. The second inlet valve 107 and the control circuit of the pure water return valve 30 to control the inlet valve 15, the booster pump 20, the second inlet valve 107, and the pure water reflux Valve 30 operates to flush the membrane cartridge 10.

In order to confirm whether the water purification system 100 ends the water production, even if it is confirmed whether the water intake switch 25 of the water purification system 100 is closed, please refer to FIG. 1, FIG. 3, FIG. 4 or FIG. 5, in an implementation of the present invention. In the example, the water purification system 100 further includes a third pressure detecting device 96, which may be a pressure sensor, a pressure switch or other device capable of detecting water pressure, and the third pressure detecting device 96 It is installed on the pure water pipe b for detecting the water pressure in the pure water pipe b. Specifically, when the water intake switch 25 is closed, the membrane cartridge 10 does not immediately stop the water production, but the pure water prepared by the membrane cartridge 10 is discharged into the pure water pipe b. The water pressure in the pure water pipe b increases, when the controller receives the third pressure detecting device 96 detects that the water pressure in the pure water pipe b reaches the fourth preset water pressure value. When the signal is received, the controller triggers the water inlet valve 15, the booster pump 20, and the pure water return valve 30 to flush the membrane cartridge 10; when the water intake switch 25 is opened, When the controller receives the third pressure detecting device 96 detecting that the water pressure in the pure water pipe b is lower than the fifth preset water pressure value, the controller triggers the water inlet valve 15 and the The booster pump 20 and the pure water return valve 30 are described to start water production.

In order to facilitate confirmation whether the water intake switch is open, the water intake switch can use an intelligent water intake switch, and when the water intake switch is opened, the signal is directly transmitted to the controller, and the controller triggers the water inlet valve 15, the booster pump 20, and The pure water return valve 30 is used to start water production.

In order to improve the detection accuracy of the third pressure detecting device 96, the water purifying system 100 is further provided with a fifth one-way valve 97 that is installed too far above the membrane cartridge 10 and the water intake switch. On the pure water pipe b between 25, the water inlet end of the pure water return pipe d is installed on the pure water pipe b between the membrane cartridge 10 and the fifth check valve 97. In this way, it is ensured that the pure water in the pure water pipe b on the water outlet side of the fifth check valve 97 does not flow back into the membrane cartridge 10, thereby ensuring the purity detected by the third pressure detecting device 96. The accuracy of the water pressure in the water pipe b.

In order to extend the service life of the membrane cartridge 10, in an embodiment of the invention, the water purification system 100 further includes a pre-filter cartridge 98, and the pre-filter cartridge 98 is mounted on the raw water pipe a. It should be noted that the number of the pre-filters 98 may be one, multiple or composite filter elements, and the pre-filters 98 may be P cotton filter elements, activated carbon filter elements or other filter elements with filtering functions. Limited. A pre-filter cartridge 98 is disposed in front of the membrane cartridge 10, so that large particles of impurities in the raw water can be effectively filtered out, thereby preventing particulate impurities in the raw water from adhering to the membrane cartridge 10, thereby causing the membrane cartridge 10 to be The problem of being clogged occurs, which further shortens the problem of the life of the membrane cartridge 10.

Optionally, the pre-filter element 98 is a composite filter element, and the composite filter element comprises a composite layer of a non-woven fabric, a carbon fiber and a P-wool, that is, the composite filter element combines the functions of a carbon fiber filter element and a P-cotton filter element, that is, a filter element is used. It is possible to replace the two filter elements, thus reducing the number of pre-filter elements 98, thereby making the installation space required for the entire water purification system 100 smaller.

In an embodiment of the present invention, referring to FIG. 1, FIG. 3, FIG. 4 or FIG. 5, the water purification system 100 further includes a rear filter element 99, the rear filter element. 99 is connected in series to the pure water pipe b. It should be noted that the number of the pre-filters 98 may be one, multiple or a composite filter. The rear filter element 99 can be an activated carbon filter element or an ultrafiltration filter element. The activated carbon filter element mainly uses activated carbon as a main raw material, which can remove residual chlorine and odor in the water, and can also improve the taste of the water, thereby facilitating the user experience. Ultrafiltration cartridges can further remove contaminants such as colloids, rust, suspended solids, sediment and macromolecular organics in water.

It should be noted that, in various embodiments of the present invention, the control circuit of the water inlet valve 15, the booster pump 20, the pure water return valve 30, the second inlet valve 107, and other components in the water purification system 100 Both are existing circuits, and the control circuits of the components in the water purification system 100 will not be described herein.

Now the water purifier is gradually developing to high recovery rate (waste water ratio), but the recovery rate is too high, which will lead to rapid decay of the membrane filter life. In order to improve the life of the filter element, the wastewater return line can be set in the water purifier water system to reduce the normal water production. The actual recovery rate at the time ensures a long life of the membrane cartridge at high recovery rates (eg 50% or even 75% recovery). 1 and 3 of the present patent application are examples in which no waste water return line is provided, and FIG. 4 is an example of a combination of a waste water return line and a waste water recovery line, and FIG. 5 and FIG. 6 are provided with a waste water return line. example. In addition, the example in FIGS. 1 and 5 is to realize the switching of the reuse/non-recycling of the wastewater through the second inlet valve 107. The example of FIGS. 3 and 6 is to realize the wastewater back through the three-way valve (one inlet and two outlet valves). Switch with / without reuse. Figures 5 and 6 show the switching of wastewater backflow/non-reflux through a wastewater return valve.

As an example in Fig. 1, the water return port j inlet is located between the waste water valve 95 and the second water inlet valve 107. When the second inlet valve When the 107 is opened, the waste water is discharged from the waste water pipe through the waste water valve 95 and the second water inlet valve 107; when the second water inlet valve 107 is closed, the waste water is reused through the waste water valve 95 and the waste water reuse pipe j;

As exemplified in Fig. 3, the waste water valve 95 is located at the outlet of the three-way valve 106, and the waste water recovery line j is located at the other outlet of the three-way valve 106. When the outlet of the three-way valve 106 waste water valve 95 is opened, the waste water is discharged from the waste water pipe through the waste water valve 95; when the outlet of the three-way valve 106 waste water recovery pipe j is opened, the waste water is reused through the waste water reuse pipe j;

As an example in FIG. 4, the water return port j inlet is located between the membrane filter waste end and the waste water valve 95. When the second inlet valve When the 107 is opened, a part of the waste water is discharged from the waste water pipe through the waste water valve 95 and the second water inlet valve 107, and another part of the waste water is returned through the waste water return line j; when the second water inlet valve When 107 is closed, the wastewater is reused through the wastewater reuse pipeline j;

As shown in the example of Fig. 5, the water inlet pipe j inlet is located between the waste water valve 95 and the second water inlet valve 107. When the second inlet valve When the 107 is opened, a part of the waste water is discharged from the waste water pipe through the waste water valve 95 and the second water inlet valve 107, and another part of the waste water is returned through the waste water return line h (when the waste water return valve 102 is opened); when the second water inlet valve is opened When 107 is closed, a part of the waste water is reused through the waste water valve 95 and the waste water return line j, and another part of the waste water is returned through the waste water return line h (when the waste water return valve 102 is opened);

As shown in the example of Fig. 6, the waste water valve 95 and the waste water return line h are located at the outlet of the three-way valve 106, and the waste water recovery line j is connected to the other outlet of the three-way valve 106. When the outlet of the three-way valve 106 waste water valve 95 is opened, a part of the waste water is discharged from the waste water pipe through the waste water valve 95, and another part of the waste water is returned through the waste water return line j (when the waste water return valve 102 is opened); when the three-way valve 106 is recycled When the outlet of the pipe j is opened, the waste water is reused through the wastewater reuse pipe j.

The specific working process of the water purifier of each embodiment and the mechanism of wastewater reuse will be specifically described below.

The specific working process of the water purifier is divided into three stages:

Normal water production stage - the first chamber of the water storage device is filled with the pure water stage - the cleaning stage.

Normal water production stage:

The water intake switch is opened, the pump and the water inlet solenoid valve 1 are opened; the pure water return valve is opened, the second water inlet valve is closed/opened according to the wastewater reuse/non-reuse; the waste water return valve (examples of Fig. 5 and Fig. 6) is based on the waste water Reflow/no reflow for opening/closing.

Waste water reuse: raw water enters the booster pump through the water inlet solenoid valve 1. After being pressurized, it enters the membrane filter for filtration. The filtered pure water flows out through the pure water pipe c, and the remaining concentrated water flows out through the waste water. . At the beginning of the water production, since the concentrated water TDS discharged from the waste end is very low, the second inlet valve is closed (Fig. 1, Fig. 4, Fig. 5) or the three-way valve waste water recovery line outlet ( Figure 3, Figure 6) is opened, the concentrated water is recovered to the pump before the pump is recovered by the waste water recovery pipe (Fig. 1, Fig. 3, Fig. 4); or a part of the concentrated water is recovered to the pump through the waste water recovery pipe, and the other part is It is refluxed through the waste water return pipe (Fig. 5, Fig. 6).

Waste water is not reused: As the water production continues, the wastewater TDS gradually rises and is not suitable for continued reuse. At this time, the second inlet valve is opened (Fig. 1, Fig. 4, Fig. 5) or the three-way valve waste valve The outlet (Fig. 3, Fig. 6) is opened, and the concentrated water is directly discharged through the waste water valve (Fig. 1, Fig. 3); or a part of the concentrated water is discharged through the waste water valve, and the other part is discharged through the waste water return pipe (Fig. 4, Fig. 5, Fig. 6). Reflux.

The first chamber of the water storage device is filled with pure water:

When the water intake switch is closed, the first chamber of the water storage device is filled with the pure water phase.

At this time, the water purifier normally obtains pure water, and the pure water flows into the first chamber of the water storage device through the pure water return line, and the water in the second chamber is squeezed out for re-watering.

The control program at this stage is basically the same as the normal water production phase. In the examples of Fig. 5 and Fig. 6, it can be determined according to the actual situation whether the wastewater return valve is opened/closed at this stage for wastewater reflux/non-reflow.

Cleaning stage:

When the first chamber of the water storage device is filled with a preset amount of pure water, it enters the washing stage.

At this time, according to the preset cleaning program, the controller controls the opening/closing of the water inlet solenoid valve 1, the pump, and the waste water valve.

Modes 5, 6, 7, 8: When cleaning, the raw water enters the second chamber of the water storage device, and the pure water in the first chamber is extruded into the membrane filter, and the concentrated water in the membrane filter is flushed out. In these modes, since the pump is not turned on, there is no driving force to recover the waste water, and the waste water is directly discharged through the waste water circuit.

Mode 1, 2, 3, 4: raw water enters the second chamber, and with the pumping force of the booster pump, the pure water in the first chamber is extruded into the membrane filter, and the concentrated water in the membrane filter is punched out. . In these modes, the pump provides the driving force to recover the wastewater due to the pump being turned on.

At the initial stage of cleaning, the discharged wastewater has a high TDS and is not suitable for recycling. At this time, the concentrated water is directly discharged through the wastewater pipeline.

As the cleaning progresses, the wastewater TDS gradually decreases, at which point the second inlet valve is closed (Fig. 1, Fig. 4, Fig. 5) or the three-way valve wastewater recovery line outlet (Fig. 3, Fig. 6) is opened. According to the preset rinsing procedure, the concentrated water is recovered to the front of the pump (modes 1, 2) through the waste water recovery pipe, and is re-watered; or recovered into the second chamber of the water storage device via the waste water recovery pipe (modes 3, 4, storage) The pure water in the first chamber of the water device is discharged, and the concentrated water in the membrane filter element is flushed out under the pressure of the pump, and the volume of the second chamber is increased due to the discharge of pure water in the first chamber, and the volume of the second chamber is increased. The water just enters the increased volume of the second chamber), and in the next pure water stage, pure water flows into the first chamber and the concentrated water recovered in the second chamber is squeezed out for re-watering.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural transformations made by the present invention and the contents of the drawings are directly or indirectly utilized in the inventive concept of the present invention. Other related technical fields are included in the scope of patent protection of the present invention.

Claims (13)

 A water purification system, characterized in that the water purification system comprises: a membrane filter core having a raw water port communicating with the raw water pipe, a pure water port communicating with the pure water pipe, and a waste water port communicating with the waste water pipe; An inlet valve installed on the raw water pipe; a pressurizing device installed on the raw water pipe between the water inlet valve and the membrane filter element; a water intake switch installed on the pure water pipe; a pure water return pipe having a water inlet end communicating with a pure water pipe between the membrane filter element and the water intake switch, and a water outlet end communicating with a raw water pipe between the inlet valve and the pressure increasing device, and Connected to the first connection point; a pure water return valve installed on the pure water return pipe; a water storage device comprising a housing and a movable member movably mounted in the housing, the movable member separating the housing into a plurality of chambers independent of each other; the chamber including the first water storage chamber and the first a second water storage chamber, wherein the first water storage chamber is connected to the pure water return pipe on the inlet side of the pure water return valve through the first pipeline, and the second water storage chamber is connected to the water source through the second pipeline. The water source may be raw water entering the raw water pipe; And a wastewater reuse pipeline, one end of the waste water return pipe is connected to the waste water pipe, the other end is connected to the raw water pipe to a third connection point, and the third connection point is located at the raw water inlet and the increase The raw water pipe between the pressure devices is used for returning the waste water of the membrane filter element to the raw water pipe or the water storage device for reuse. A water purification system according to claim 1, wherein said waste water pipe is provided with a waste water valve and a second water inlet valve, said waste water valve being located in said second water inlet valve and said membrane filter Between mouths; The water inlet end of the wastewater reuse pipeline is in communication with a waste water pipe between the waste water valve and the second water inlet valve. The water purification system according to claim 2, wherein the waste water reuse line is provided with a second one-way valve; The second one-way valve is unidirectionally guided from the waste water port of the membrane filter element to the third connection point. The water purification system according to claim 1, wherein the waste water pipe is provided with a waste water valve and a three-way valve, and a water inlet of the three-way valve is connected to a waste water port of the membrane filter element, the three The first water outlet of the valve is in communication with the waste water valve, and the second water outlet of the three-way valve is in communication with the water inlet end of the wastewater reuse pipeline. The water purification system of claim 1 wherein said water purification system further comprises: a waste water return pipe, one end of the waste water return pipe is connected to the waste water pipe, the other end is connected to the raw water pipe to a second connection point, and the second connection point is located on the raw water pipe in front of the pressure increasing device; A waste water return valve, a waste water return valve is disposed on the waste water return pipe. The water purification system according to claim 5, wherein the water purification system further comprises a wastewater proportional valve, and the wastewater proportional valve is disposed on the waste water return pipe; Disposed on the waste water return pipe, the wastewater proportional valve and the waste water return valve; A waste water valve is disposed on the waste water pipe, and an inlet end of the waste water return pipe is connected between the waste water valve and the waste water port. A water purifying system according to claim 2 or 3, wherein said water purifying system further comprises a controller, said controller and said water inlet valve, said supercharging device, said water intake switch, The second water inlet valve and the pure water return valve are electrically connected, and the controller flushes the membrane filter core when receiving the shutdown signal of the water intake switch, and the water purification system has various cleaning modes. And different cleaning modes can be used in combination. A water purification system according to claim 2 or 3, wherein said water purification system further comprises a first pressure detecting means or a first flow detecting means, said first pressure detecting means or said first flow detecting means being installed On the first pipeline; The controller is further electrically connected to the first pressure detecting device or the first flow detecting device, and the controller controls the water inlet according to the detection result of the first pressure detecting device or the first flow detecting device The valve, the boosting device, the second inlet valve, and the pure water return valve operate. A water purification system according to claim 2 or 3, wherein said water purification system further comprises current detecting means for detecting a supercharging means; The controller is electrically connected to the current detecting device, and the controller controls the water inlet valve, the pressure increasing device, the second water inlet valve and the ground according to the detection result of the current detecting device The pure water return valve works. A water purification system according to claim 2 or 3, wherein said water purification system further comprises a second pressure detecting means or a second flow detecting means, said second pressure detecting means or said second flow detecting means being installed Between the pressurizing device and the membrane cartridge, or on a waste pipe between the membrane cartridge and the second inlet valve; The controller is further electrically connected to the second pressure detecting device or the second flow detecting device, and the controller controls the water inlet according to the detection result of the second pressure detecting device or the second flow detecting device The valve, the boosting device, the second inlet valve, and the pure water return valve operate. A water purification system according to claim 2 or 3, wherein said water purification system further comprises a timing device for detecting a standby time of said water purification system; The controller is further electrically connected to the timing device, and the controller controls the water inlet valve, the pressure increasing device, the second water inlet valve, and the pure according to the detection result of the timing device The water return valve operates to flush the membrane cartridge; the controller rinsing the membrane cartridge at intervals according to the timing of the timing device. A water purification system according to claim 2 or 3, wherein said water purification system further comprises a TDS sensing device, said TDS sensing device being mounted on said waste water pipe; said controller also The TDS sensing device is electrically connected, and the controller controls the operation of the water inlet valve, the pressure increasing device, the second water inlet valve, and the pure water return valve according to the detection result of the timing device To rinse the membrane cartridge. A water purification system according to claim 2 or 3, wherein the water purification system further comprises a third pressure detecting device, the third pressure detecting device being mounted on the pure water pipe; The water inlet end of the pure water return pipe is in communication with a pure water pipe between the membrane filter element and the third pressure detecting device; The controller is further electrically connected to the third pressure detecting device, and the controller triggers when the controller detects that the water pressure value detected by the third pressure detecting device is higher than the fourth preset water pressure value. a control circuit of the water inlet valve, the pressure increasing device, the second water inlet valve, and the pure water return valve to control the water inlet valve, the pressure increasing device, and the second water inlet The valve and the pure water return valve operate to flush the membrane cartridge; the controller receives the detection signal that the water pressure value detected by the third pressure detecting device is lower than the fifth preset water pressure value a control circuit for triggering the water inlet valve, the boosting device, the second water inlet valve, and the pure water return valve to control the water inlet valve, the pressure increasing device, and the second The inlet valve and the pure water return valve operate to cause the membrane cartridge to start water production; wherein the fourth predetermined water pressure value is greater than the fifth predetermined water pressure value.