CN211056815U

CN211056815U - Water purification system

Info

Publication number: CN211056815U
Application number: CN201921022618.2U
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: 2020-07-21
Anticipated expiration: 2029-07-02

Abstract

The utility model discloses a water purification system, which comprises a water supply source, a first filter, a second filter, a three-way pipe, a flow-limiting ratio valve, a first check valve, a water purification faucet and a domestic faucet; the water inlet end of the first filter is communicated with a 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 purifying faucet is communicated with the second purified water outlet through a purified water outlet waterway; the first wastewater outlet, the domestic tap and the second wastewater outlet are respectively communicated among three pipe orifices of the three-way pipe; the flow limiting ratio valve and the first check valve are communicated between the first waste water outlet and the three-way pipe. The utility model discloses technical scheme has reduced the emission of waste water to the life of first filter and second filter has been prolonged.

Description

Water purification system

Technical Field

The utility model relates to a water purification technology field, in particular to water purification system.

Background

Along with the improvement of living standard of people, people pay more and more attention to the current water quality. At present, a lot of users have installed water purifying devices at home, in which filters play the most important role, and most of the waste water generated in some water purifying devices is discharged into a sewer regularly and quantitatively through a waste water proportional solenoid valve, so that the service life of the filters is short when the waste water is accumulated in the filters.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a water purification system aims at improving the life of filter among the water purification system to reduce waste water discharge.

In order to achieve the purpose, the utility model provides a water purification system, which comprises a water supply source, a first filter, a second filter, a three-way pipe, a flow limiting ratio valve, a first check valve, a water purification faucet and a domestic faucet; 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 purifying faucet is communicated with the second purified water outlet through a purified water outlet waterway; the three-way pipe is provided with a first pipe orifice, a second pipe orifice and a third pipe orifice which are mutually communicated, and the second waste water outlet is communicated with the third pipe orifice; the flow limiting ratio valve is communicated between the first waste water outlet and the first pipe orifice; the water inlet end of the first check valve is communicated with the first pipe orifice, and the water outlet end of the first check valve is communicated with the first wastewater outlet; the domestic water tap is communicated with the second pipe orifice.

Optionally, the first filter comprises a housing and a filter cartridge; one end of the shell is provided with a water inlet, and the other end of the shell is provided with the first purified water outlet and the first wastewater outlet; the filter element is arranged in the shell; the filter element comprises a central tube, a diaphragm and a membrane ring; the central pipe comprises a water inlet hole and a water outlet hole, the first water purification outlet and the water outlet hole are communicated, the membrane is wrapped on the outer side of the central pipe, and a cavity is formed between the first water purification outlet and the shell; the water inlet and the first wastewater outlet are both communicated with the cavity; the membrane ring is clamped between the membrane and the inner wall of the shell.

Optionally, the ratio of the inner diameter D1 of the housing to the outer diameter D2 of the diaphragm has a range of values: d1 is more than or equal to 2, and D2 is less than or equal to 10.

Optionally, the housing comprises a membrane shell vial and an end cap; the filter element is arranged in the membrane shell bottle body, the membrane shell bottle body is provided with an installation opening, and the end cover is detachably connected with the membrane shell bottle body and covers the installation opening; the water inlet is arranged on the end cover, and the first wastewater outlet and the first purified water outlet are arranged at the bottom of the membrane shell bottle body.

Optionally, the protruding sealing ring that is equipped with of inside wall of membrane shell bottle, the sealing ring is close to the diapire setting of membrane shell bottle, the center tube passes the sealing ring, just the inner wall of sealing ring supports holds the lateral wall of center tube.

Optionally, the water purification system still includes second check valve and third check valve, the second check valve is located the water purification goes out the water route, the end intercommunication of intaking of third check valve the play water end of second check valve, the play water end intercommunication of third check valve the second waste water export.

Optionally, the second water inlet waterway is provided with a booster pump, the purified water outlet waterway is also communicated with a first high-pressure switch, and the first high-pressure switch is electrically connected with the booster pump to control the booster pump to be opened; and/or the water outlet end of the second check valve is also connected with a water purification tank, and the water inlet end of the third check valve is connected with the water inlet end of the water purification tank.

Optionally, the water purification system still includes second high pressure switch, the end intercommunication of intaking of second high pressure switch the second mouth of pipe, the play water end intercommunication of second high pressure switch domestic tap, second high pressure switch with the booster pump electricity is connected.

Optionally, the first water inlet waterway is provided with a water inlet solenoid valve, and the first high-voltage switch and the second high-voltage switch are both electrically connected to the water inlet solenoid valve.

Optionally, the first water inlet waterway is provided with a low-voltage switch, and the low-voltage switch is electrically connected with the booster pump.

The utility model discloses technical scheme is through the end of intaking with the first water purification export intercommunication second filter of first filter, and the second water purification export intercommunication water purification tap of second filter, then accessible water purification tap outflow water purification, the water purification that first water inlet flows moreover can protect the second filter when passing through the second filter to prolong the life of second filter. The waste water flowing out from the first waste water outlet and the second waste water outlet enters the domestic water faucet through the three-way pipe, so that the domestic water requirement of a user can be met, and the discharge amount of the waste water is reduced. The setting of current limiting ratio valve and first check valve provides power to rivers in the pipeline between first filter to the second filter and follow-up pipeline to guarantee that the running water can be through first filter and second filter in order to realize at least two-stage filter effect, and then guarantee user's water consumption.

Drawings

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

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

fig. 2 is a schematic diagram of the circuit connection of some electric devices in the water purification system of the present invention;

FIG. 3 is a schematic structural view of a filter in the water purification system of the present invention;

fig. 4 is a cross-sectional view a-a of fig. 3.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a water purification 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 three-way pipe 30, a flow limiting ratio valve 45, a first check valve 41, a water purification faucet, and a domestic faucet; 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 the 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 waste water outlet 202; the purified water faucet is communicated with a second purified water outlet 201 through a purified water outlet waterway 3; the three-way pipe 30 is provided with a first pipe orifice 301, a second pipe orifice 302 and a third pipe orifice 303 which are communicated with each other, and the second waste water outlet 202 is communicated with the third pipe orifice 303; the flow limiting ratio valve 45 is communicated between the first waste water outlet 102 and the first pipe orifice 301; the water inlet end of the first check valve 41 is communicated with the first pipe orifice 301, and the water outlet end of the first check valve 41 is communicated with the first wastewater outlet 102; the first check valve 41 is connected with the flow limiting ratio valve 45 in series; the domestic water tap is communicated with the second pipe orifice 302.

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, the purified water generated after the two-stage filtration by 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, instead of the first waste water outlet 102 of the first filter 10 being communicated with the water inlet end of the second filter 20, the purified water passing through the purified water outlet of the first filter 10 reduces the degree of contamination of the second filter 20. In addition, by connecting the first wastewater outlet 102 of the first filter 10, the second wastewater outlet 202 of the second filter 20 and the domestic water tap to three pipe orifices of the three-way pipe 30, it can be understood that the wastewater flowing out from the first wastewater outlet 102 and the second wastewater outlet 202 mixes the tap water for washing the first filter 10 and the mixed water after the purified water for washing the second filter 20 (the purified water is formed after being filtered by the first filter 10), and the mixed water can be used as domestic water which flows out through the domestic water tap to be used for washing vegetables, dishes or clothes. The water volume of the domestic water is far greater than that of the purified water, so that on one hand, when the domestic water faucet is opened for a long time, tap water can continuously wash the filter membrane in the filter, so that pollutants adhered to the filter membrane can be washed off and the filter membrane can be cleaned, and the washed tap water can be mixed with the previously generated wastewater to dilute the wastewater, thereby meeting the requirement of the domestic water; on the other hand, the first waste water outlet 102 and the second waste water outlet 202 are simultaneously communicated with the domestic water faucet, so that the water outlet efficiency of the domestic water faucet can be improved.

Further, by providing the flow limiting ratio valve 45 and the first check valve 41, only a part of the waste water filtered by the tap water supplied from the water supply source through the first filter 10 can pass through the flow limiting ratio valve 45, and the other part of the waste water is collected between the water inlet end of the flow limiting ratio valve 45 and the waste water outlet of the first filter 10, so that the water pressure at the waste water outlet and the purified water outlet of the first filter 10 is relatively high, the pressure difference from the purified water outlet of the first filter 10 to the purified water outlet of the second filter 20 is increased, the water at the purified water outlet of the first filter 10 can flow to the second filter 20, and the secondary filtering effect by the second filter 20 is realized under the action of the pressure difference. It can be understood that the waste water after the secondary filtration under the above-mentioned pressure difference can flow smoothly to the third pipe orifice 303 of the three-way pipe 30 and then flow to the domestic faucet from the second pipe orifice 302 of the three-way pipe 30. In addition, the first check valve 41 is a one-way valve, and is used for ensuring that the water flow direction of the first wastewater outlet waterway 4 can only flow towards one direction, i.e. preventing the water at the first nozzle 301 from flowing backwards to the first wastewater outlet 102. It will be appreciated that in other embodiments, a separate first non-return valve 41 may not be provided between the first nozzle 301 and the first waste water outlet 102 if the flow restriction ratio valve 45 is itself a non-return valve.

Of course, in other embodiments, the tap water is not limited to being filtered twice, i.e. in other embodiments, the water purification system may comprise more than two filters, thereby achieving the effect of multi-stage filtration.

The utility model discloses technical scheme is through the end of intaking with first water purification export 101 intercommunication second filter 20 of first filter 10, and second water purification export 201 intercommunication water purification tap of second filter 20, then accessible water purification tap outflow water purification, and the water purification that first water purification export 101 flows in addition can protect second filter 20 when passing through second filter 20 to extension second filter 20's life. The waste water flowing out from the first waste water outlet 102 and the second waste water outlet 202 enters the domestic water faucet through the three-way pipe 30, so that the domestic water requirement of a user can be met, and the discharge amount of the waste water is reduced. The arrangement of the flow limiting ratio valve 45 and the first check valve 41 provides power for water flow in the pipeline between the first filter 10 and the second filter 20 and subsequent pipelines thereof, so that tap water can be ensured to pass through the first filter 10 and the second filter 20 to realize at least two-stage filtering effects, and further the water consumption of a user is ensured.

Referring to fig. 1, fig. 3 and fig. 4, 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 also be higher than the second level of the second filter 20. For better protection of the filter with the higher filtering grade, the filtering grade of the first filter 10 is optionally lower than that of the second filter 20. For example, the first filter 10 may be a hollow fiber filter membrane with low precision, which can effectively block rust, large particulate pollutants such as iron rust and so on in tap water; the second filter 20 can be a high-precision roll-type filter membrane which can effectively block micro pollutants such as calcium and magnesium ions, heavy metals or viruses and bacteria in water. In this manner, the service life of the first filter 10 and the second filter 20 can be simultaneously extended.

It will be appreciated that the filtration membranes used will differ in the degree of filtration required for the first filter 10 and the second filter 20, but that 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 cartridge 200 is disposed inside the housing 100; the cartridge 200 includes a center tube 210, a membrane sheet 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 membrane 220 is wrapped outside the central tube 210, and forms a cavity with the housing 100; the water inlet 121 and the first wastewater outlet 102 are both communicated with the cavity; the diaphragm ring 230 is sandwiched between the diaphragm 220 and the inner wall of the housing 100.

By providing 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 restriction ratio valve 45 between the first filter 10 and the three-way pipe 30 blocks a part of waste water from passing through, 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 place can rapidly provide power and push the water flowing out from the first purified water outlet 101 to the second filter 20, thereby rapidly preparing purified water and flowing out waste water through the second filter 20. Further, the filter element 200 includes a central tube 210, a membrane 220 wrapped outside the central tube 210, and a membrane ring 230 sandwiched between the membrane 220 and the inner wall of the housing 100, so that the tap water can be firstly purified by the membrane ring 230, and then purified by the membrane 220 for the second time, and finally flows into the central tube 210 and is discharged through the first purified water outlet 101. In addition, a cavity is formed between the membrane 220 and the housing 100, and the first waste water outlet 102 is communicated with the cavity, so that the concentrated water which does not penetrate through the membrane 220 into the central pipe 210 is retained in the cavity and can be discharged through the first waste water outlet 102. The membrane ring 230 is disposed between the membrane 220 and the housing 100, so that the filter element 200 can be stably installed in the housing 100, and the stability of installation of the filter element 200 is ensured.

Further, as shown in fig. 4, the ratio of the inner diameter D1 of the housing 100 to the outer diameter D2 of the diaphragm 220 ranges from: d1 is more than or equal to 2, and D2 is less than or equal to 10. By setting the range 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; it is ensured that the water holding chamber has a suitable water holding space to prevent the membrane 220 from being blocked by contaminants soon, and on the other hand, it is avoided that the housing 100 of the filter is too large relative to the filter element 200, so that the housing 100 occupies a large installation space under the condition that the filter element 200 has the same pure water producing capacity.

As shown in fig. 4, 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 the mounting opening of the membrane housing bottle 110, the water inlet 121 is opened in the end cap 120, and the first waste water outlet 102 and the first purified water outlet 101 are opened in the bottom of the membrane housing bottle 110.

By providing the housing 100 with the membrane housing bottle 110 and the end cap 120 detachably connected to the membrane housing bottle 110, the user can easily replace the filter cartridge 200 inside at any time, so that the housing 100 can be reused. Specifically, the membrane housing vial 110 and the end cap 120 may be threaded or snap-fit, etc. In order to guarantee better leakproofness, the utility model discloses optional membrane shell bottle 110 and end cover 120 threaded connection among the technical scheme, one of them of membrane shell bottle 110 and end cover 120 can be equipped with the internal thread promptly, and another person corresponds and is equipped with the external screw thread, closes the effect of being connected who realizes membrane shell bottle 110 and end cover 120 through internal thread and external screw thread soon.

In addition, by opening the water inlet 121 at the end cap 120, and the first waste water outlet 102 and the first purified water outlet 101 at the bottom of the membrane housing bottle 110, the structure of the filter cartridge 200 is made relatively simple. Of course, it is understood that the first waste water outlet 102 and/or the first purified water outlet 101 may be disposed at the same end as the water inlet 121.

Further, as shown in fig. 4, a limiting ring 113 is convexly disposed on the inner sidewall of the membrane casing bottle 110, the limiting ring 113 is disposed near the bottom wall of the membrane casing bottle 110, the central tube 210 passes through the limiting ring 113, and the inner wall of the limiting ring 113 abuts against the sidewall of the central tube 210. Through the arrangement of the limiting ring 113, on one hand, the limiting effect can be achieved on the installation of the filter element 200, 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. 4, a seal ring 300 is interposed between the center tube 210 and the stopper ring 113. Through locating sealing washer 300 clamp between center tube 210 and spacing ring 113, make the cavity that forms between diaphragm 220 and the membrane shell bottle 110 not communicate with the export of center tube 210 to avoid water purification and waste water to mix, guaranteed the play water quality of water purification.

Further, as shown in fig. 4, the central tube 210 includes a connecting section 211 and a water passing section 212 connected to the connecting section 211, wherein the connecting section 211 shields the water inlet 121; the water passing section 212 is hollow, and the side wall of the water passing section 212 is provided with a water inlet 2121; the membrane ring 230 is disposed corresponding to the connection section 211.

Through the above arrangement, the tap water flowing in from the water inlet 121 is prevented from flowing into the central tube 210 first, but the tap water is ensured to be firstly purified by the membrane ring 230 and then enter the central tube 210 from the water inlet 2121 of the water passing section 212 of the central tube 210 after being purified by the membrane 220, so that the water in the central tube 210 is ensured to be completely purified pure water.

As shown in fig. 1, when the purified water faucet and the domestic water faucet are closed, in order to achieve a better back flushing effect for the first filter 10 and the second filter 20, in this embodiment, the water purification system further includes a second check valve 42 and a third check valve 43, the second check valve 42 is disposed in the purified water outlet water path 3, a water inlet end of the third check valve 43 is communicated with a water outlet end of the second check valve 42, and a water outlet end of the third check valve 43 is communicated with the second waste water outlet 202.

It can be understood that, when the second check valve 42 is disposed on the purified water outlet waterway 3, in order to ensure that the purified water can flow to the purified water faucet, 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 faucet. In addition, by the third check valve 43, when the user opens the clean water tap, the clean water flows out from the second clean water port 201, and flows to the clean water 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 in the pipeline close to the clean water tap flows reversely; due to the arrangement of the second check valve 42, the water flow does not reversely flow back to the second purified water outlet 201, but enters the second wastewater outlet 202 through the third check valve 43, so that the second wastewater outlet 202 washes the filter membrane of the second filter 20 towards the second water inlet end, and reversely flows to the first purified water outlet 101 of the first filter 10 through the water inlet 121 of the second water inlet end; finally the first filter 10 is back flushed through the first clean water outlet 101, so that the effect of back flushing the first filter 10 and the second filter 20 is achieved when the clean water tap is closed.

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

The purified water tank 50 can achieve the effect of storing purified water, and the first and

second filters

10 and 20 can be backwashed with the purified water in the purified water tank 50 when the purified water faucet is closed. Specifically, the water purification tank 50 may include a housing and an edible rubber air bag provided in the housing, and when the water purification tap is closed, the water flowing out from the second purified water outlet 201 flows into the water purification tank 50, so that the water pressure gradually increases and the air bag contracts; when the water purifying faucet 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 instantaneous water outlet flow of the water purifying faucet is ensured.

Further, as shown in fig. 1, the second water inlet waterway 2 is provided with a booster pump 60, the purified water outlet waterway 3 is further communicated with a first high-pressure switch 71, and the first high-pressure switch 71 is electrically connected with the booster pump 60 to control the booster pump 60 to be opened.

By providing the pressurizing pump 60 in the second water inlet path 2, it is possible to ensure sufficient pressure at the water inlet end of the second filter 20 when the pressurizing pump 60 is turned on, so that the water passing through the first filter 10 can be filtered again through the second filter 20. In addition, the first high-pressure switch 71 has a function of detecting water pressure, the purified water outlet waterway 3 is further provided with the first high-pressure switch 71, the first high-pressure switch 71 is electrically connected with the booster pump 60 to control the booster pump 60 to be turned on, after the purified water faucet is turned on, the first high-pressure switch 71 detects that the water pressure of the purified water outlet waterway 3 is reduced, and the first high-pressure switch 71 controls the booster pump 60 to be turned on, so that the first filter 10 and the second filter 20 can continuously purify the tap water and can flow out enough water outlet quantity from the purified water faucet.

Of course, as shown in fig. 1, the water purification system may further include a second high-pressure switch 72, a water inlet end of the second high-pressure switch 72 is communicated with the second pipe orifice 302, a water outlet end of the second high-pressure switch 72 is communicated with the domestic water faucet, and the second high-pressure switch 72 is electrically connected with the booster pump 60. When the user opens the domestic water tap, the second high-pressure switch 72 detects that the water pressure in the pipeline between the second pipe orifice 302 and the domestic water tap is reduced, so as to control the booster pump 60 to be opened, thereby ensuring that the domestic water tap can flow out enough domestic water.

Further, as shown in fig. 1, the first water inlet path 1 is provided with a water inlet solenoid valve 80, and both the first high-pressure switch 71 and the second high-pressure switch 72 are electrically connected to the water inlet solenoid valve 80.

When the purified water faucet is opened, the water inlet electromagnetic valve 80 can be controlled to be opened through the first high-pressure switch 71, so that water inlet is ensured, and then the water inlet is continuously discharged from the purified water faucet after passing through the first filter 10 and the second filter 20; when the domestic water tap is opened, the second high-pressure switch 72 controls the water inlet electromagnetic valve 80 to be opened, so that water is ensured to enter, and then the water is continuously discharged from the domestic water tap after passing through the first filter 10 and the second filter 20. When the first high-pressure switch 71 and the second high-pressure switch 72 are both closed, the water inlet electromagnetic valve 80 can be controlled to be closed, so that the pipeline is prevented from being subjected to the water hammer effect of tap water.

As shown in fig. 2, when the water purification system is provided with the booster pump 60, the water inlet solenoid valve 80, the first high-voltage switch 71 and the second high-voltage switch 72, the utility model provides a circuit connection scheme for this electric device: the water inlet electromagnetic valve 80 is electrically connected with the booster pump 60 in parallel, and the first high-voltage switch 71 is electrically connected with the second high-voltage switch 72 in parallel; the first high-voltage switch 71 and the second high-voltage switch 72 are both electrically connected in series with the water inlet solenoid valve 80, and the first high-voltage switch 71 and the second high-voltage switch 72 are both electrically connected in series with the booster pump 60.

Specifically, when the clean water faucet is turned on and the domestic water faucet is turned off, the first high-pressure switch 71 detects that the pressure of the clean water outlet waterway 3 is reduced, so that the first high-pressure switch 71 is closed, and the second high-pressure switch 72 detects that the pressure of the wastewater outlet waterway is high, so that the second high-pressure switch 72 is opened; because the first high-voltage switch 71 and the second high-voltage switch 72 are electrically connected in parallel and then electrically connected in series with the water inlet electromagnetic valve 80 or the booster pump 60, the closing of the first high-voltage switch 71 can still control the opening of the water inlet electromagnetic valve 80 and the booster pump 60, so as to ensure that the water supply source can supply water and can ensure a certain water inlet pressure. Similarly, when the domestic water tap is opened and the clean water tap is closed, the first high-pressure switch 71 is opened, the second high-pressure switch 72 is closed, and the water inlet electromagnetic valve 80 and the booster pump 60 can be simultaneously controlled to be opened through the closing of the second high-pressure switch 72. When the domestic water tap and the clean water tap are simultaneously opened, the first high-pressure switch 71 and the second high-pressure switch 72 are both closed, thereby ensuring that the water inlet electromagnetic valve 80 and the booster pump 60 are opened. When the domestic water tap and the clean water tap are simultaneously opened, the first high-pressure switch 71 and the second high-pressure switch 72 are both turned off, so that the water inlet solenoid valve 80 and the booster pump 60 are both powered off and in a closed state.

Further, as shown in fig. 1, the first water inlet path 1 is provided with a low-pressure switch 90, and the low-pressure switch 90 is electrically connected to the booster pump 60.

By providing the low pressure switch 90 in the first water inlet path 1, when the low pressure switch 90 detects that the water inlet pressure is reduced, for example, when the water supply source stops supplying water, the low pressure switch 90 detects that the water inlet pressure is zero, and the low pressure switch 90 is turned off, so that the booster pump 60 is turned off, and the no-load operation of the booster pump 60 is avoided.

Further, as shown in fig. 1, in order to prevent the water in the second wastewater outlet waterway 5 from flowing back to the second filter 20, the water purification system may further include a fourth check valve 44, a water inlet end of the fourth check valve 44 is communicated with the second wastewater outlet 202, and a water outlet end of the fourth check valve 45 is communicated with the third nozzle 303.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present 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 purifying faucet is communicated with the second water purifying outlet through a water purifying outlet waterway;

the three-way pipe is provided with a first pipe orifice, a second pipe orifice and a third pipe orifice which are mutually communicated, and the second waste water outlet is communicated with the third pipe orifice;

the flow limiting ratio valve is communicated between the first waste water outlet and the first pipe orifice;

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

the domestic water faucet is communicated with the second pipe orifice.

2. The water purification system of claim 1, wherein the first filter comprises:

a water inlet is formed in one end of the shell, and the first purified water outlet and the first wastewater outlet are formed in the other end of the shell; and

a filter element disposed within the housing; the filter element comprises:

the central pipe comprises a water inlet hole and a water outlet hole, and the first water purification outlet is communicated with the water outlet hole;

the membrane is wrapped on the outer side of the central pipe, and a cavity is formed between the membrane and the shell; the water inlet and the first wastewater outlet are both communicated with the cavity; and

and the membrane ring is clamped between the membrane and the inner wall of the shell.

3. The water purification system of claim 2, wherein the ratio of the inner diameter D1 of the housing to the outer diameter D2 of the diaphragm has a range of values: d1 is more than or equal to 2, and D2 is less than or equal to 10.

4. The water purification system of claim 3, wherein the housing comprises a membrane shell bottle and an end cap; the filter element is arranged in the membrane shell bottle body, the membrane shell bottle body is provided with an installation opening, and the end cover is detachably connected with the membrane shell bottle body and covers the installation opening; the water inlet is arranged on the end cover, and the first wastewater outlet and the first purified water outlet are arranged at the bottom of the membrane shell bottle body.

5. The water purification system of claim 4, wherein the inner sidewall of the membrane shell bottle body is convexly provided with a sealing ring, the sealing ring is arranged close to the bottom wall of the membrane shell bottle body, the central tube passes through the sealing ring, and the inner wall of the sealing ring abuts against the sidewall of the central tube.

6. The water purification system of any one of claims 1 to 5, further comprising a second check valve and a third check valve, wherein the second check valve is disposed in the purified water outlet waterway, a water inlet end of the third check valve is communicated with a water outlet end of the second check valve, and a water outlet end of the third check valve is communicated with the second wastewater outlet.

7. The water purification system of claim 6, wherein the second water inlet waterway is provided with a booster pump, the purified water outlet waterway is further communicated with a first high-pressure switch, and the first high-pressure switch is electrically connected with the booster pump so as to control the booster pump to be opened; and/or the water outlet end of the second check valve is also connected with a water purification tank, and the water inlet end of the third check valve is connected with the water inlet end of the water purification tank.

8. The water purification system of claim 7, further comprising a second high-pressure switch, wherein a water inlet end of the second high-pressure switch is communicated with the second nozzle, a water outlet end of the second high-pressure switch is communicated with the domestic water tap, and the second high-pressure switch is electrically connected with the booster pump.

9. The water purification system of claim 8, wherein the first inlet water path is provided with an inlet solenoid valve, and the first high-pressure switch and the second high-pressure switch are electrically connected with the inlet solenoid valve.

10. The water purification system of claim 7, wherein the first water inlet circuit is provided with a low-pressure switch, and the low-pressure switch is electrically connected with the booster pump.