CN110182984B

CN110182984B - Water purification system

Info

Publication number: CN110182984B
Application number: CN201910597608.XA
Authority: CN
Inventors: 田宇; 孙宝胜
Original assignee: Nation Water Shenzhen Co ltd
Current assignee: Nation Water Shenzhen Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2024-06-14
Anticipated expiration: 2039-07-02
Also published as: CN110182984A

Abstract

The invention discloses a water purification system and a control method thereof. The water purifying system comprises a water supply source, a first filter, a second filter, a four-way pipe, a flow limiting ratio valve, a first check valve connected in series with the flow limiting ratio valve, a flushing electromagnetic valve, a booster pump, a water purifying tap, a household tap and a controller; the water supply source and the water outlet end of the flushing electromagnetic valve are communicated with the water inlet end of the first filter; the first filter has a first clean water outlet and a first wastewater outlet; the water inlet end of the second filter is communicated with the first purified water outlet through a booster pump, and the second filter is provided with a second purified water outlet and a second waste water outlet; the water purifying tap is communicated with the second water purifying outlet; the water inlet end of the flow limiting ratio valve is communicated with the first waste water outlet, and the second waste water outlet, the water outlet end of the flow limiting ratio valve, the water inlet end of the flushing electromagnetic valve and the domestic water tap are respectively communicated with the four-way pipe; the flushing solenoid valve and the booster pump are electrically connected with the controller. The technical scheme of the invention reduces the discharge amount of wastewater and prolongs the service life of the filter.

Description

Water purification system

Technical Field

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

Background

With the improvement of living standard of people, people pay more and more attention to the current water quality. At present, a plurality of users have installed water purifying equipment at home, in the water purifying equipment, a filter plays the most important role, and at present, waste water generated in some water purifying machines is mostly discharged into a sewer in a timed and quantitative manner by controlling waste water generated in the filter through a waste water flushing electromagnetic valve, so that the service life of the filter is shorter when the waste water is accumulated in the filter.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention mainly aims to provide a water purifying system which aims at reducing the discharge amount of wastewater and prolonging the service life of a filter.

In order to achieve the above purpose, the water purification system provided by the invention comprises a water supply source, a first filter, a second filter, a four-way pipe, a flow limiting ratio valve, a first check valve, a flushing electromagnetic valve, a booster pump, a water purification tap, a domestic water tap and a controller; the water inlet end of the first filter is communicated with the water outlet end of the water supply source through a first water inlet waterway; the water outlet end of the first filter is provided with a first purified water outlet and a first waste water outlet; the water inlet end of the second filter is communicated with the first purified water outlet through a second water inlet waterway, and the water outlet end of the second filter is provided with a second purified water outlet and a second wastewater outlet; the water purification faucet is communicated with the second water purification outlet through a water purification outlet waterway; the four-way pipe is provided with a first pipe orifice, a second pipe orifice, a third pipe orifice and a fourth pipe orifice which are communicated with each other, and the second waste water outlet is communicated with the first pipe orifice; the flow limiting ratio valve is communicated with the first waste water outlet and the second pipe orifice; the water inlet end of the first check valve is communicated with the first waste water outlet; the water outlet end of the first check valve is communicated with the second pipe orifice, and the first check valve is connected with the flow limiting ratio valve in series; the water inlet end of the flushing electromagnetic valve is communicated with the third pipe orifice, and the water outlet end of the flushing electromagnetic valve is communicated with the first water inlet waterway; the booster pump is arranged on the second water inlet waterway; the domestic water tap is communicated with the fourth pipe orifice; the flushing electromagnetic valve and the booster pump are electrically connected with the controller.

Optionally, the flush solenoid valve is a proportional solenoid valve.

Optionally, the water purification system further comprises a second check valve and a third check valve, the second check valve is arranged on the water purification water outlet waterway, the water inlet end of the third check valve is communicated with the water outlet end of the second check valve, and the water outlet end of the third check valve is communicated with the second waste water port.

Optionally, the water outlet end of the second check valve is also connected with a water purifying tank, and the water inlet end of the third check valve is connected with the water inlet end of the water purifying tank.

Optionally, the purified water outlet waterway is also communicated with a first high-voltage switch, and the first high-voltage switch is electrically connected with the controller;

And/or the water purification system further comprises a second high-voltage switch, wherein the water inlet end of the second high-voltage switch is communicated with the fourth pipe orifice, the water outlet end of the second high-voltage switch is communicated with the household faucet, and the second high-voltage switch is electrically connected with the controller;

And/or, the first water inlet waterway is provided with a water inlet electromagnetic valve; the water inlet electromagnetic valve is electrically connected with the controller;

And/or the first water inlet waterway is provided with a low-voltage switch, and the low-voltage switch is electrically connected with the controller.

The invention also provides a control method of the water purification system, which comprises the following steps:

Controlling the water purifying tap and the domestic water tap to be closed;

the controller receives a cleaning instruction for cleaning the first filter and the second filter, and controls the flushing electromagnetic valve and the booster pump to work so as to enable liquid in the pipeline to flow in through the water inlet of the first filter and flow out through the first wastewater outlet and the second wastewater outlet.

Optionally, the purge command is issued by a timer of the flush solenoid valve.

Optionally, the timer of the flushing electromagnetic valve further comprises a cleaning completion instruction, and the controller closes the flushing electromagnetic valve and sends out prompt information capable of working normally after receiving the cleaning completion instruction.

Optionally, after sending the prompt message of normal operation, the controller receives the control instruction of the high-voltage switch of the water purification system after receiving the normal operation instruction, and the controller controls the operation of the booster pump according to the control instruction of the high-voltage switch.

Optionally, after the water supply source stops supplying water, the controller receives a control instruction of a low-pressure switch of a first water inlet waterway in the water purifying system, and the controller controls the booster pump to stop working according to the control instruction of the low-pressure switch.

According to the technical scheme, the first water purifying outlet of the first filter is communicated with the water inlet end of the second filter, the second water purifying outlet of the second filter is communicated with the water purifying tap, so that purified water can flow out through the water purifying tap, and the purified water flowing out from the first water inlet can protect the second filter when passing through the second filter, so that the service life of the second filter is prolonged. The wastewater flowing out from the first wastewater outlet and the second wastewater outlet enters the domestic water faucet through the four-way pipe, so that the requirements of domestic water of users can be met, and the discharge amount of the wastewater is reduced. The arrangement of the flow limiting ratio valve and the first check valve provides power for the water flow in the pipeline between the first filter and the second filter and the subsequent pipeline, so that the tap water can pass through the first filter and the second filter to realize at least two-stage filtering effect, and the water consumption of a user is further ensured. In addition, the arrangement of the flushing electromagnetic valve and the booster pump is combined, and the flushing electromagnetic valve and the booster pump are electrically connected with the controller, so that the controller is convenient to control the flushing electromagnetic valve and the booster pump on one hand, and on the other hand, the effect of circularly flushing the first filter and the second filter can be achieved by circularly flowing waste water generated by the first filter and the second filter, the waste water discharge is further reduced, and the service lives of the first filter and the second filter are prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a water purification system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a filter in the water purification system of the present invention;

fig. 3 is a cross-sectional view of A-A in fig. 2.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a water purifying system.

In the embodiment of the present invention, as shown in fig. 1, the water purification system includes a water supply source, a first filter 10, a second filter 20, a four-way pipe 30, a flow-limiting ratio valve 45, a first check valve 41, a flushing solenoid valve 46, a booster pump 60, a water purification faucet, a domestic faucet, and a controller; the water inlet end of the first filter 10 is communicated with the water outlet end of the water supply source through a first water inlet waterway 1; the water outlet end of the first filter 10 is provided with a first purified water outlet 101 and a first waste water outlet 102; the water inlet end of the second filter 20 is communicated with the first purified water outlet 101 through a second water inlet waterway 2, and the water outlet end of the second filter 20 is provided with a second purified water outlet 201 and a second wastewater outlet 202; the water purifying tap is communicated with the second water purifying outlet 201 through the water purifying water outlet waterway 3; the four-way pipe 30 is provided with a first pipe orifice 301, a second pipe orifice 302, a third pipe orifice 303 and a fourth pipe orifice 304 which are communicated with each other, and the second wastewater outlet 202 is communicated with the first pipe orifice 301; the flow limiting ratio valve 45 is communicated with the first waste water outlet 102 and the second pipe orifice 302; the water inlet end of the first check valve 41 is communicated with the first waste water outlet 102; the water outlet end of the first check valve 41 is communicated with the second pipe orifice 302, and the first check valve 41 is connected in series with the flow limiting ratio valve 45; the water inlet end of the flushing electromagnetic valve 46 is communicated with the third pipe orifice 303, and the water outlet end of the flushing electromagnetic valve 46 is communicated with the first water inlet waterway 1; the booster pump 60 is arranged on the second water inlet waterway 2; the household tap is communicated with the fourth pipe port 304; the flush solenoid valve 46 and the booster pump 60 are both electrically connected to the controller.

By communicating the first purified water outlet 101 of the first filter 10 with the water inlet end of the second filter 20, and further communicating the second purified water outlet 201 of the second filter 20 with the purified water tap, purified water generated after two-stage filtration of the first filter 10 and the second filter 20 can flow out through the purified water tap, and the purified water outlet of the first filter 10 is communicated with the water inlet end of the second filter 20, but not the first waste water outlet 102 of the first filter 10 is communicated with the water inlet end of the second filter 20, so that the purified water passing through the purified water outlet of the first filter 10 weakens the pollution degree of the second filter 20.

Further, by providing the four-way pipe 30, the flow limiting ratio valve 45 is communicated with the first waste water outlet 102 and the second pipe orifice 302 of the four-way pipe 30, the second waste water orifice is communicated with the first pipe orifice 301 of the four-way pipe 30, and the domestic water is communicated with the fourth pipe orifice 304 of the four-way pipe 30, both waste water generated by the first filter 10 and waste water generated by the second filter 20 can flow to the domestic water faucet through the four-way pipe 30, so that tap water supplied by the water supply source can be mixed with waste water generated by the first filter 10 and the second filter 20 before in the flowing process of the domestic water faucet in the frequent opening process of the domestic water faucet, and then mixed water of the waste water and the tap water flows to the domestic water faucet through the four-way pipe 30.

Further, by communicating the restrictor valve 45 with the first waste water outlet 102 and the second pipe orifice 302, the first check valve 41 is connected in series with the restrictor valve 45, and the water inlet end of the first check valve 41 is communicated with the first waste water outlet 102, and the water outlet end of the first check valve 41 is communicated with the second pipe orifice 302, water flow can only flow from the first waste water outlet 102 to the second pipe orifice 302 of the four-way pipe 30 on the first waste water outlet waterway 4, and water flow from the second pipe orifice 302 is not allowed to flow to the first waste water orifice. Meanwhile, due to the arrangement of the flow limiting ratio valve 45, a part of wastewater generated by the first filter 10 can flow to the second pipe orifice 302, and the other part of water is limited between the first wastewater outlet 102 and the water inlet end of the flow limiting ratio valve 45, so that the water pressure of the water outlet end of the first filter 10 is increased, it can be understood that the water pressure of the first purified water outlet 101 of the first filter 10 is also increased, so that the water flow at the position flows to the second filter 20 under the power of the water pressure, and the water flow smoothly passes through the filter membrane of the second filter 20 according to the pressure difference between the second filter 20 and the first purified water outlet 101, so that the effects of preparing purified water and discharging wastewater are realized, and the pure water requirement and the domestic water requirement of a user are met. It will be appreciated that in other embodiments, if the restrictor valve 45 itself is a one-way valve, a single first check valve 41 may not be provided between the second nozzle 302 and the first waste outlet 102.

By connecting the water inlet end of the flushing solenoid valve 46 to the third pipe orifice 303 of the four-way pipe 30, the water outlet end of the flushing solenoid valve 46 is connected to the first water inlet waterway 1, and the booster pump 60 is arranged on the second water inlet waterway 2, when at least part of water flows through the flushing solenoid valve 46, the water power passing through the flushing solenoid valve 46 can flow to the first filter 10 again through the first water inlet waterway 1, and then the generated waste water flows to the position of the four-way pipe 30 through the first waste water outlet 102 of the first filter 10, meanwhile, the generated clean water flows to the second filter 20 through the first clean water outlet 101 of the first filter 10, and finally, the waste water generated through the second filter 20 flows to the four-way pipe 30 through the second waste water outlet 202, and then the water flow of the four-way pipe 30 flows to the flushing solenoid valve 46. This achieves a flushing circuit for flushing the first filter 10 and the second filter 20. The booster pump 60 is provided in the second water intake passage 2, and thus the booster pump 60 plays a role of a power for circulating the water flow when the water flow circulates through the flushing circuit to flush the first filter 10 and the second filter 20. It will be appreciated that both the flushing solenoid valve 46 and the booster pump 60 are electrically connected to the controller, and that when the flushing solenoid valve 46 issues a cleaning command for cyclically cleaning the first filter 10 and the second filter 20, the controller may control the booster pump 60 to operate according to the cleaning command, thereby ensuring the flow power of the water for cyclically cleaning the first filter 10 and the second filter 20.

According to the technical scheme of the invention, the first purified water outlet 101 of the first filter 10 is communicated with the water inlet end of the second filter 20, the second purified water outlet 201 of the second filter 20 is communicated with the purified water tap, so that purified water can flow out through the purified water tap, and the purified water flowing out from the first purified water outlet 101 can protect the second filter 20 when passing through the second filter 20, so that the service life of the second filter 20 is prolonged. The wastewater flowing out from the first wastewater outlet 102 and the second wastewater outlet 202 enters the domestic faucet through the four-way pipe 30, so that the domestic water requirement of users can be met, and the discharge amount of wastewater is reduced. The arrangement of the restriction valve 45 and the first non-return valve 41 provides power to the water flow in the line between the first filter 10 and the second filter 20 and in the subsequent line, thereby ensuring that the tap water can pass through the first filter 10 and the second filter 20 to achieve at least two stages of filtering effects, thereby ensuring the water usage by the user. In addition, the flushing solenoid valve 46 and the booster pump 60 are combined, and the flushing solenoid valve 46 and the booster pump 60 are electrically connected with the controller, so that on one hand, the controller can conveniently control the flushing solenoid valve 46 and the booster pump 60, and on the other hand, the effect of circularly flowing the wastewater generated by the first filter 10 and the second filter 20 to circularly flush the first filter 10 and the second filter 20 can be realized, the wastewater discharge amount is further reduced, and the service lives of the first filter 10 and the second filter 20 are prolonged.

Further, as shown in fig. 1, in order to better extend the service life of the first filter 10 and the second filter 20, the flushing solenoid valve 46 in this embodiment may be selected as a proportional solenoid valve. When the proportioning solenoid valve is in a closed state, a part of water can still pass through the proportioning solenoid valve, so that as long as the booster pump 60 is turned on, no matter whether the proportioning solenoid valve is turned on or off, a part of waste water passing through the proportioning solenoid valve always enters a flushing circuit to flush the first filter 10 and the second filter 20, thereby avoiding excessive pollutant substances adhering to the first filter 10 and the second filter 20 for a long time.

Further, as shown in fig. 1, the water purification system further includes a second check valve 42 and a third check valve 43, the second check valve 42 is disposed on the purified water outlet waterway 3, the water inlet end of the third check valve 43 is connected to the water outlet end of the second check valve 42, and the water outlet end of the third check valve 43 is connected to the second waste water port.

It will be appreciated that when the second check valve 42 is provided in the purified water outlet waterway 3, in order to ensure that purified water flows to the purified water tap, the water inlet end of the second check valve 42 is communicated with the second purified water outlet 201, and the water outlet end of the second check valve 42 is communicated with the purified water tap. Further, by providing the third check valve 43 again, when the user opens the water purifying tap, the purified water flows out from the second water purifying port and flows to the water purifying tap through the second check valve 42. When the clean water tap is closed, the pressure on the clean water outlet waterway 3 is increased, so that the water of the pipeline close to the clean water tap can flow reversely; due to the arrangement of the second non-return valve 42, the water flow does not flow back to the second clean water outlet 201 but enters the second waste water outlet 202 through the third non-return valve 43, so that the second waste water outlet 202 flushes the filter membrane of the second filter 20 towards the second water inlet end, and flows back to the first clean water outlet 101 of the first filter 10 through the water inlet of the second water inlet end; finally, the first filter 10 is backwashed through the first purified water outlet 101, so that the effect of backwashing the first filter 10 and the second filter 20 can be achieved when the water tap is turned off.

Further, as shown in fig. 1, the water outlet end of the second check valve 42 may be further connected to a water purifying tank 50, and the water inlet end of the third check valve 43 is connected to the water inlet end of the water purifying tank 50.

The water purifying tank 50 can achieve the effect of storing purified water, and when the water purifying tap is turned off, the first filter 10 and the second filter 20 can be backwashed with the purified water in the water purifying tank 50. Specifically, the water purifying tank 50 may include a housing and an edible rubber bladder provided in the housing, and when the water purifying faucet is closed, water flowing out of the second water purifying outlet 201 flows into the water purifying tank 50, so that the water pressure becomes gradually high and the bladder contracts; when the water purifying tap is opened, firstly, the stored water with certain pressure in the water purifying tank 50 flows out, the water pressure in the water purifying tank 50 is reduced, the air bag is increased, and the instant water outlet flow of the water purifying tap is ensured.

Further, as shown in fig. 1, the purified water outlet waterway 3 is further communicated with a first high-voltage switch 71, and the first high-voltage switch 71 is electrically connected to the controller.

The first high-voltage switch 71 has the function of detecting water pressure, the first high-voltage switch 71 is arranged through the purified water outlet waterway 3, the first high-voltage switch 71 is electrically connected with the controller, and the first high-voltage switch 71 can send a water pressure signal on the purified water outlet waterway 3 to the controller, so that the controller can determine whether to control other components such as the booster pump 60 or not according to the parameters. For example, when the water purification tap is turned on, the first high-pressure switch 71 detects a decrease in the water pressure of the purified water outlet waterway 3, so that the first high-pressure switch 71 transmits a signal of the decrease in the water pressure to the controller, so that the controller can issue a control on command to the booster pump 60 according to the signal, thereby ensuring that the first filter 10 and the second filter 20 can continuously purify tap water and a sufficient water outlet amount is discharged from the water purification tap.

Of course, as shown in fig. 1, the water purifying system may further include a second high-voltage switch 72, the water inlet end of the second high-voltage switch 72 is connected to the fourth pipe 304, the water outlet end of the second high-voltage switch 72 is connected to the faucet, and the second high-voltage switch 72 is electrically connected to the controller.

Similar to the first high-pressure switch 71 described above, when the user turns on the domestic water tap, the second high-pressure switch 72 detects a decrease in water pressure in the pipe between the fourth pipe port 304 and the domestic water tap, and thus sends a signal of the decrease in water pressure to the controller, which sends a control-on instruction to the booster pump 60 according to the signal instruction to ensure that the domestic water tap can flow out enough domestic water. Further, when the first high-voltage switch 71 and the second high-voltage switch 72 are simultaneously present, the controller may send an on command to the booster pump 60 so as to meet the requirement of the purified water amount or the domestic water amount as long as one of them sends a signal of the water pressure decrease to the controller. When the two parties send signals of water pressure rise to the controller at the same time, the controller sends a stop instruction to the booster pump 60 so as to avoid that the booster pump 60 continues to work, so that the water supply amount is large and the pipeline pressure is overlarge.

As shown in fig. 1, the first water inlet waterway 1 may further be provided with a water inlet solenoid valve 80, and the water inlet solenoid valve 80 is electrically connected to the controller.

By providing the water inlet solenoid valve 80 to the first water inlet waterway 1, whether or not to pass water through the first filter 10 and the second filter 20 can be controlled to achieve preparation of pure water and outflow of domestic water. It is understood that the manner of controlling the water inlet solenoid valve 80 by the controller may be the same as the manner of controlling the booster pump 60 described above, and will not be described in detail herein.

As shown in fig. 1, the first water inlet waterway 1 may further be provided with a low-voltage switch 90, and the low-voltage switch 90 is electrically connected to the controller.

It will be appreciated that the low pressure switch 90 may detect the water pressure of the first water intake path 1, and when the water pressure is reduced to a certain level, send a signal to the controller, and the controller controls the booster pump 60 to stop, so as to avoid the no-load operation of the booster pump 60.

As shown in fig. 1, to avoid the water in the second wastewater outlet waterway 5 from flowing back into the second filter 20, the water purifying system may further include a fourth check valve 44, wherein the water inlet end of the fourth check valve 44 is connected to the second wastewater outlet 202, and the water outlet end of the fourth check valve 45 is connected to the first pipe orifice 301.

Referring to fig. 1,2 and 3, specifically, the filtering level of the first filter 10 is equal to the filtering level of the second filter 20, or the filtering level of the first filter 10 is lower than the second level of the second filter 20, although the filtering level of the first filter 10 may be higher than the second level of the second filter 20. For better protection of filters with higher filtration levels, the first filter 10 may optionally have a lower filtration level than the second filter 20. For example, the first filter 10 can be a low-precision hollow fiber filter membrane, which can effectively block large-particle pollutants such as rust, sediment and the like in tap water; the second filter 20 may be a high-precision roll-type filter film, which can effectively block calcium and magnesium ions, heavy metals, viruses, bacteria and other tiny pollutants in water. In this way, the service lives of the first filter 10 and the second filter 20 can be prolonged at the same time.

It will be appreciated that the filter membranes used are different depending on the level of filtration required for the first filter 10 and the second filter 20, but the internal structure may be the same or different. Taking the structure of the first filter 10 as an example, the first filter 10 may include a housing 100 and a filter cartridge 200; one end of the shell 100 is provided with a water inlet 121, and the other end is provided with a first purified water outlet 101 and a first wastewater outlet 102; the filter element 200 is disposed inside the housing 100; the filter element 200 comprises a central tube 210, a membrane 220 and a membrane ring 230; the central tube 210 comprises a water inlet 2121 and a water outlet 2122, and the first purified water outlet 101 is communicated with the water outlet 2122; the diaphragm 220 is wrapped outside the central tube 210, and a cavity is formed between the diaphragm and the housing 100; the water inlet 121 and the first wastewater outlet 102 are communicated with the cavity; the membrane ring 230 is sandwiched between the membrane 220 and the inner wall of the housing 100.

By arranging the water inlet 121 at one end of the housing 100 and the first purified water outlet 101 and the first waste water outlet 102 at the other end of the housing 100, when the flow limiting ratio valve 45 between the first filter 10 and the three-way pipe 30 blocks a part of waste water from passing, the pressures at the first waste water outlet 102 and the first purified water outlet 101 of the first filter 10 can be in a pressurized state in a short time, so that the water pressure at the first waste water outlet can quickly provide power and push the water flowing out from the first purified water outlet 101 to the second filter 20, thereby preparing pure water and flowing out waste water through the second filter 20 more quickly. Further, the filter element 200 includes a central tube 210, a membrane 220 wrapped outside the central tube 210, and a membrane ring 230 interposed between the membrane 220 and an inner wall of the housing 100, so that tap water may be purified once through the membrane ring 230, and then purified twice through the membrane 220, and finally flows into the central tube 210 and the completely purified water is discharged from the first purified water outlet 101. In addition, a cavity is formed between the diaphragm 220 and the housing 100, and the first waste water outlet 102 communicates with the cavity, so that the concentrated water which does not enter the central tube 210 through the diaphragm 220 remains in the cavity and can be discharged through the first waste water outlet 102. The membrane ring 230 is sandwiched between the membrane 220 and the housing 100, so that the filter element 200 can be stably installed in the housing 100, and the installation stability of the filter element 200 is ensured.

Further, as shown in fig. 3, the range of values of the ratio of the inner diameter D1 of the housing 100 to the outer diameter D2 of the diaphragm 220 is: d1 is more than or equal to 2, and D2 is more than or equal to 10. By setting the range value of the ratio of the inner diameter D1 of the housing 100 to the outer diameter D2 of the diaphragm 220 to 2.ltoreq.D1, D2.ltoreq.10; the water storage chamber can be ensured to have a proper water storage space so as to prevent the membrane 220 from being blocked by pollutants quickly, and on the other hand, the housing 100 of the filter is prevented from being oversized relative to the filter core 200, so that the housing 100 occupies a larger installation space under the condition that the filter core 200 has the same pure water production amount.

Referring to fig. 2 and 3 in combination, the housing 100 includes a membrane housing bottle 110 and an end cap 120 detachably connected to the membrane housing bottle 110, the end cap 120 covers an installation opening of the membrane housing bottle 110, a water inlet 121 is formed in the end cap 120, and a first wastewater outlet 102 and a first purified water outlet 101 are formed in the bottom of the membrane housing bottle 110.

By including the membrane housing bottle 110 and the end cap 120 detachably connected with the membrane housing bottle 110 with the housing 100, the user can conveniently replace the filter element 200 inside at any time, so that the housing 100 can be reused. Specifically, the membrane housing bottle 110 and the end cap 120 may be screwed or snap-fit, etc. In order to ensure better tightness, the optional film shell bottle 110 is in threaded connection with the end cover 120 in the technical scheme of the invention, that is, one of the film shell bottle 110 and the end cover 120 can be provided with internal threads, and the other one is correspondingly provided with external threads, so that the connection effect of the film shell bottle 110 and the end cover 120 is realized through screwing the internal threads and the external threads.

In addition, by opening the water inlet 121 at the end cover 120, the first wastewater outlet 102 and the first purified water outlet 101 are opened at the bottom of the membrane housing bottle 110, so that the structure of the filter element 200 is relatively simple. Of course, it is understood that the first wastewater outlet 102 and/or the first purified water outlet 101 may be provided at the same end as the water inlet 121.

Further, as shown in fig. 3, the inner side wall of the membrane housing bottle 110 is convexly provided with a limiting ring 113, the limiting ring 113 is disposed near the bottom wall of the membrane housing bottle 110, the central tube 210 passes through the limiting ring 113, and the inner wall of the limiting ring 113 abuts against the side wall of the central tube 210. Through the arrangement of the limiting ring 113, on one hand, the limiting effect on the installation of the filter element 200 can be achieved, so that the installation effect of the filter element 200 is further improved; on the other hand, the inner wall of the limiting ring 113 abuts against the side wall of the central tube 210, so that the limiting ring 113 separates the cavity between the membrane 220 and the membrane housing bottle 110 from the water outlet of the central tube 210.

Further, as shown in fig. 3, a sealing ring 300 is interposed between the central tube 210 and the stopper ring 113. By clamping the sealing ring 300 between the central tube 210 and the limiting ring 113, the cavity formed between the membrane 220 and the membrane shell bottle 110 is not communicated with the outlet of the central tube 210, so that the mixing of purified water and waste water is avoided, and the water outlet quality of purified water is ensured.

Further, as shown in fig. 3, the central tube 210 includes a connection section 211 and a water passing section 212 connected to the connection section 211, the connection section 211 shielding the water inlet 121; the water passing section 212 is hollow, and a water inlet 2121 is formed in the side wall of the water passing section 212; the membrane ring 230 is disposed in correspondence with the connection section 211.

By the arrangement, the tap water flowing from the water inlet 121 is prevented from flowing into the central tube 210, and the tap water can be purified once through the membrane ring 230 and then purified through the membrane 220, and then enters the central tube 210 through the water inlet 2121 of the water passing section 212 of the central tube 210, so that the water in the central tube 210 is purified water thoroughly.

The invention also provides a control method of the water purifying system, and the specific structure of the water purifying system refers to the embodiment. The control method of the water purification system comprises the following steps:

controlling the water purifying tap and the domestic water tap to be closed;

It is understood that both the water purification faucet and the domestic water faucet can be closed by a user, and a timing unit can be arranged in the controller, and the controller controls the water purification faucet and the domestic water faucet to be closed when a certain time is reached. For example, the timing unit may set the time for closing the water purification faucet and the household faucet to be between 0 and 2 a.m.

The controller receives a cleaning instruction for cleaning the first filter 10 and the second filter 20, controls the operation of the flushing solenoid valve 46 and the booster pump 60 to flow in the liquid in the pipeline through the water inlet of the first filter 10 and out through the first wastewater outlet 102 and the second wastewater outlet 202;

when the controller receives the cleaning command for cleaning the first filter 10 and the second filter 20 and controls the flushing solenoid valve 46 and the booster pump 60 to operate, the booster pump 60 can provide power for the liquid in the pipeline in which the flushing solenoid valve 46, the booster pump 60, the first filter 10 and the second filter 20 are connected in series, so that the liquid circulates in a loop formed by the three in series, and the liquid can enter from the water inlet of the first filter 10 and flow out through the first wastewater outlet 102 and the second wastewater outlet 202, thereby realizing the effect of circularly flushing the first filter 10 and the second filter 20.

Specifically, in the present embodiment, the purge command is issued by a timer that flushes the solenoid valve 46.

The inside of the flushing solenoid valve 46 may be provided with a timer, and the flushing solenoid valve 46 is electrically connected to the controller, and the timer of the flushing solenoid valve 46 may be started to be used as the cleaning command when a predetermined time is reached, so that the cleaning command is prompted to be sent to the controller, and the controller controls the flushing solenoid valve 46 and the booster pump 60 to operate when receiving the cleaning command sent by the timer.

Further, the timer of the flushing solenoid valve 46 further includes a cleaning completion command, and the controller closes the flushing solenoid valve 46 and the booster pump 60 after receiving the cleaning completion command, and sends out a prompt message that the flushing solenoid valve can work normally.

When the filter has been cleaned for a period of time, for example, after the filter has been cleaned for half an hour or one hour, the timer may be closed, thereby sending a cleaning completion instruction to the controller, which in turn controls to close the flushing solenoid valve 46, avoiding having the flushing solenoid valve 46 and the booster pump 60 in an active state at all times, and sending a prompt message that the filter can be operated normally. The prompt information can be a light prompt or a sound prompt. It is understood that normal operation means that the water purification faucet and the domestic water faucet can be turned on later, purified water can flow out of the water purification faucet, and mixed water of the waste water and tap water flows out of the domestic water faucet.

In an embodiment, after sending the prompt information of normal operation, the controller receives the control instruction of the high-voltage switch of the water purification system after receiving the normal operation instruction, and the controller controls the booster pump 60 to operate according to the control instruction of the high-voltage switch.

The normal operating instruction refers to an action state of opening the water purifying tap and/or the domestic water tap. It will be appreciated that the water purification system may not immediately enter a normal operation state after the controller sends a normal operation prompt, for example, after the filter is cleaned at two midnight, the controller may send a normal operation prompt, but the user may need to start the water purification faucet after getting up in the morning, and the controller receives a normal operation instruction. When the controller receives the support working instruction and receives the control instruction of the high-voltage switch of the water purifying system, the controller controls the booster pump 60 to work according to the control instruction, so that the water purifying and water outlet efficiency is improved.

It will be appreciated that the high-voltage switch may include a first high-voltage switch 71 provided in the purified water outlet waterway 3 and a second high-voltage switch 72 provided between the fourth pipe port 304 and the domestic water tap, and the controller may receive a control command of any one of the first high-voltage switch 71 and the second high-voltage switch 72, thereby controlling the operation of the booster pump 60 according to the command.

In another embodiment, after the controller sends out the prompt information of normal operation and receives the normal operation instruction, the controller receives the control instruction of the low-pressure switch 90 of the first water inlet channel 1 of the water purification system, and the controller controls the booster pump 60 to stop working according to the control instruction of the low-pressure switch 90.

The normal operating instructions still refer to the action state of opening the water purification faucet and/or the domestic water faucet. In addition, after the controller receives the normal working instruction, the water purifying tap and/or the domestic water tap can be normally started, but whether water can be discharged from the water purifying tap and/or the domestic water tap is uncertain. For example, when the water supply source is cut off, in order to avoid idling of the booster pump 60, the controller may control the booster pump 60 to stop operating by a control command according to the low-voltage switch 90. Specifically, the low-pressure switch 90 may detect the water pressure of the water inlet channel, and when the water pressure drops to zero, the low-pressure switch 90 sends a control command to the controller, so that the controller controls the booster pump 60 to stop.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A water purification system, comprising:

A water supply source;

The water inlet end of the first filter is communicated with the water outlet end of the water supply source through a first water inlet waterway; the water outlet end of the first filter is provided with a first purified water outlet and a first waste water outlet;

the water inlet end of the second filter is communicated with the first purified water outlet through a second water inlet waterway, and the water outlet end of the second filter is provided with a second purified water outlet and a second wastewater outlet;

the water purification faucet is communicated with the second water purification outlet through a water purification outlet waterway;

The four-way pipe is provided with a first pipe orifice, a second pipe orifice, a third pipe orifice and a fourth pipe orifice which are communicated with each other, and the second wastewater outlet is communicated with the first pipe orifice;

A restrictor valve in communication with the first waste outlet and the second nozzle;

The water inlet end of the first check valve is communicated with the first waste water outlet; the water outlet end of the first check valve is communicated with the second pipe orifice, and the first check valve is connected with the flow limiting ratio valve in series;

The water inlet end of the flushing electromagnetic valve is communicated with the third pipe orifice, and the water outlet end of the flushing electromagnetic valve is communicated with the first water inlet waterway;

the booster pump is arranged on the second water inlet waterway;

The domestic water tap is communicated with the fourth pipe orifice; and

The flushing electromagnetic valve and the booster pump are electrically connected with the controller;

the flushing electromagnetic valve is a proportional electromagnetic valve; the water purification system further comprises a second check valve and a third check valve, the second check valve is arranged on the water purification and water outlet waterway, the water inlet end of the third check valve is communicated with the water outlet end of the second check valve, and the water outlet end of the third check valve is communicated with the second wastewater outlet;

2. The water purification system of claim 1, wherein the water outlet end of the second check valve is further connected to a water purification tank, and the water inlet end of the third check valve is connected to the water inlet end of the water purification tank.

3. The water purification system of claim 1 or 2, wherein the purified water outlet waterway is further communicated with a first high voltage switch, and the first high voltage switch is electrically connected to the controller;

4. A control method of a water purification system as claimed in any one of claims 1 to 3, comprising:

Controlling the water purifying tap and the domestic water tap to be closed;

5. The method of controlling a water purification system as claimed in claim 4, wherein the washing command is issued by a timer of the washing solenoid valve.

6. The method of claim 5, wherein the timer of the flushing solenoid valve further comprises a cleaning completion command, and the controller closes the flushing solenoid valve and sends out a prompt message for normal operation after receiving the cleaning completion command.

7. The method according to claim 6, wherein the controller receives a control command of a high-voltage switch of the water purification system after receiving a normal operation command after sending a normal operation prompt message, and the controller controls the operation of the booster pump according to the control command of the high-voltage switch.

8. The control method of the water purification system as claimed in claim 7, wherein the controller receives a control command of a low pressure switch of a first water inlet path in the water purification system after the water supply source stops supplying water, and the controller controls the booster pump to stop working according to the control command of the low pressure switch.