CN211056816U - Water purification system - Google Patents

Abstract

The utility model discloses a water purification system and a control method thereof. The water purification 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, a flushing electromagnetic valve, a booster pump, a water purification faucet, a domestic faucet and a controller, wherein the first check valve is connected with the flow limiting ratio valve in series; the water supply source and the water outlet end of the flushing electromagnetic valve are both communicated with the water inlet end of the first filter; 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 booster pump, and the second filter is provided with a second purified water outlet and a second waste water outlet; the water purifying faucet is communicated with the second purified water outlet; the water inlet end of the flow limiting ratio valve is communicated with the first wastewater outlet, and the second wastewater outlet, the water outlet end of the flow limiting ratio valve, the water inlet end of the flushing electromagnetic valve and the domestic water faucet are respectively communicated with the four-way pipe; the flushing electromagnetic valve and the booster pump are both electrically connected with the controller. The technical scheme of the utility model waste water discharge has been reduced, the life-span of 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, many users have installed water purification devices at home, in which a filter plays the most important role, and most of the wastewater generated in some water purifiers is discharged into a sewer regularly and quantitatively by controlling the wastewater generated in the filter through a wastewater flushing solenoid valve, so that the service life of the filter is short when the wastewater is accumulated in the filter.

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 reducing the waste water discharge to improve the life of filter.

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 four-way pipe, a flow-limiting ratio valve, a first check valve, a flushing electromagnetic valve, a booster pump, a water purification faucet, a domestic faucet 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 purifying faucet is communicated with the second purified water outlet through a purified water 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 wastewater 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 both electrically connected with the controller.

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

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 mouth.

Optionally, the water outlet end of the second check valve is further 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 purified water outlet waterway is also communicated with a first high-pressure switch, and the first high-pressure switch is electrically connected to the controller;

and/or the water purification system further comprises a second high-pressure switch, the water inlet end of the second high-pressure switch is communicated with the fourth pipe orifice, the 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 to 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 which is electrically connected with the controller.

The utility model also provides a control method of water purification system, include:

controlling the purified water faucet and the domestic water faucet to be closed;

and 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 solenoid valve further includes a cleaning completion instruction, and the controller closes the flushing solenoid valve after receiving the cleaning completion instruction, and sends prompt information that the flushing solenoid valve can work normally.

Optionally, after sending the prompt message of normal operation, the controller receives a normal operation instruction and receives a control instruction of a high-pressure switch of the water purification system, and the controller controls the booster pump to operate according to the control instruction of the high-pressure 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 purification system, and the controller controls the booster pump to stop working according to the control instruction of the low-pressure switch.

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 four-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. 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 can control the flushing electromagnetic valve and the booster pump conveniently, the wastewater generated by the first filter and the second filter can flow circularly, the effect of circularly flushing the first filter and the second filter can be realized, the wastewater discharge amount 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 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 structural view of a filter in the water purification system of the present invention;

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

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 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 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 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 waste water 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 a first wastewater 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 with the flow limiting ratio valve 45 in series; the water inlet end of the flushing solenoid valve 46 is communicated with the third pipe orifice 303, and the water outlet end of the flushing solenoid 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 domestic water tap is communicated with the fourth pipe orifice 304; the rinse solenoid valve 46 and the booster pump 60 are 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, 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.

Furthermore, by arranging a four-way pipe 30, the flow limiting ratio valve 45 is communicated with the first wastewater outlet 102 and the second pipe orifice 302 of the four-way pipe 30, the second wastewater 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 the wastewater generated by the first filter 10 and the wastewater generated by the second filter 20 can flow to the domestic water faucet through the four-way pipe 30, so that the tap water supplied by the water supply source can be mixed with the wastewater generated by the first filter 10 and the second filter 20 in the flowing process during the frequent opening process of the domestic water faucet, and the mixed water of the wastewater and the tap water flows to the domestic water faucet through the four-way pipe 30, on one hand, the domestic water requirement of the user can be met, on the other hand, the effect of flushing the first filter 10 and the second filter 20 by the tap water can be realized while the domestic water faucet is opened, thereby extending the service life of the first filter 10 and the second filter 20.

Further, by connecting the flow limiting ratio valve 45 to the first waste water outlet 102 and the second pipe orifice 302, the first check valve 41 is connected in series with the flow limiting ratio valve 45, the water inlet end of the first check valve 41 is connected to the first waste water outlet 102, and the water outlet end of the first check valve 41 is connected to the second pipe orifice 302, the water flow on the first waste water outlet waterway 4 can only flow from the first waste water outlet 102 to the second pipe orifice 302 of the four-way pipe 30, but not flow from the second pipe orifice 302 to the first waste water outlet. 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 wastewater 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 pure 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, a separate first non-return valve 41 may not be provided between the second nozzle 302 and the first waste water outlet 102 if the flow restriction ratio valve 45 is itself a one-way valve.

By communicating the water inlet end of the flushing solenoid valve 46 with the third nozzle 303 of the four-way pipe 30, communicating the water outlet end of the flushing solenoid valve 46 with the first water inlet waterway 1, and arranging the booster pump 60 on the second water inlet waterway 2, when at least part of water flows can pass through the flushing solenoid valve 46, the water power passing through the flushing solenoid valve 46 can flow to the first filter 10 through the first water inlet waterway 1 again, further the generated wastewater flows to the four-way pipe 30 through the first wastewater outlet 102 of the first filter 10, meanwhile, the generated purified water flows to the second filter 20 through the first purified water outlet 101 of the first filter 10, finally, the wastewater generated through the second filter 20 flows to the four-way pipe 30 through the second wastewater outlet 202, and further the water flow of the four-way pipe 30 flows to the flushing solenoid valve 46 again. A flushing circuit for flushing the first filter 10 and the second filter 20 is thus realized. The pressurizing pump 60 is provided in the second water inlet path 2, and the pressurizing pump 60 serves as a power for circulating the water when the water flows through the flushing circuit to circularly flush the first and second filters 10 and 20. It will be understood that the rinse solenoid valve 46 and the pressurizing pump 60 are electrically connected to the controller, and when the rinse solenoid valve 46 issues a cleaning command for circularly cleaning the first and second strainers 10 and 20, the controller may control the pressurizing pump 60 to operate according to the cleaning command, thereby ensuring the flow power of the water for circularly cleaning the first and second strainers 10 and 20.

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 four-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. In addition, the arrangement of the flushing solenoid valve 46 and the booster pump 60 is combined, and the flushing solenoid valve 46 and the booster pump 60 are electrically connected with the controller, so that the controller can conveniently control the flushing solenoid valve 46 and the booster pump 60 on the one hand, and on the other hand, the wastewater generated by the first filter 10 and the second filter 20 can circularly flow, so as to perform the effect of circularly flushing the first filter 10 and the second filter 20, further reduce the wastewater discharge amount and prolong the service life of the first filter 10 and the second filter 20.

Further, as shown in FIG. 1, to better extend the useful life of the first filter 10 and the second filter 20, the flush solenoid valve 46 in this embodiment may be selected to be a proportional solenoid valve. When the proportional solenoid valve is in a closed state, a part of water can still pass through the proportional solenoid valve, so that as long as the booster pump 60 is opened, regardless of whether the proportional solenoid valve is opened or closed, a part of wastewater passing through the proportional solenoid valve always enters the flushing circuit to flush the first filter 10 and the second filter 20, thereby preventing excessive pollutants from being adhered 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 in the purified water outlet waterway 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.

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 setting the third check valve 43, when the user opens the water purifying tap, the purified water flows out from the second purified water outlet, 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 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 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 purified water outlet water path 3 is also communicated with a first high-pressure switch 71, and the first high-pressure switch 71 is electrically connected to the controller.

The first high-pressure switch 71 has a function of detecting water pressure, the first high-pressure switch 71 is arranged on the purified water outlet waterway 3, and the first high-pressure switch 71 is electrically connected with the controller, so that the first high-pressure switch 71 can send a water pressure signal on the purified water outlet waterway 3 to the controller, and the controller can determine whether to control other components such as the booster pump 60 according to the parameter. For example, when the clean water tap is opened, the first high pressure switch 71 detects that the water pressure of the clean water outlet channel 3 is reduced, so that the first high pressure switch 71 sends a signal of the reduced water pressure to the controller, and the controller can send a control opening instruction to the booster pump 60 according to the signal, thereby ensuring that the first filter 10 and the second filter 20 can continuously purify the tap water and flow out a sufficient water outlet amount from the clean water tap.

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 connected to the fourth pipe orifice 304, a water outlet end of the second high-pressure switch 72 is connected to the domestic faucet, and the second high-pressure switch 72 is electrically connected to the controller.

Similar to the first high pressure switch 71, when the user opens the domestic water faucet, the second high pressure switch 72 detects that the water pressure in the pipeline between the fourth pipe orifice 304 and the domestic water faucet is reduced, so as to send a signal of the water pressure reduction to the controller, and the controller sends a control opening instruction to the booster pump 60 according to the signal instruction to ensure that the domestic water faucet can flow enough domestic water. Further, when the first high-pressure switch 71 and the second high-pressure switch 72 are both present, the controller may send an opening command to the booster pump 60 so as to satisfy the demand of the amount of purified water or the amount of domestic water as long as one of the two switches sends a signal to the controller to reduce the water pressure. When both sides send the signal of water pressure rise to the controller, the controller sends a stop instruction to the booster pump 60 to prevent the booster pump 60 from continuing to work, so that the water supply amount is large and the pipeline pressure is too high.

As shown in fig. 1, the first water inlet circuit 1 may further include 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 in the first water inlet path 1, it is possible to control whether water passes through the first filter 10 and the second filter 20 to achieve the preparation of pure water and the outflow of domestic water. It is understood that the controller may control the water inlet solenoid valve 80 in the same manner as the booster pump 60, and thus, the detailed description thereof is omitted.

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

It can be understood that the low pressure switch 90 can detect the water pressure of the first water inlet channel 1, and when the water pressure is reduced to a certain degree, a signal is sent to the controller, and the controller controls the booster pump 60 to stop, so as to prevent the booster pump 60 from no-load operation.

As shown in fig. 1, in order to prevent the water in the second waste water 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 waste water outlet 202, and a water outlet end of the fourth check valve 45 is communicated with the first nozzle 301.

Referring to fig. 1, fig. 2 and fig. 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 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. 3, 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.

Referring to fig. 2 and fig. 3, 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 disposed on the end cap 120, and the first waste water outlet 102 and the first purified water outlet 101 are disposed at 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. 3, 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. 3, 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. 3, 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.

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 (10)

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 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;

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 wastewater 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;

a water inlet end of the flushing electromagnetic valve is communicated with the third pipe orifice, and a 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 faucet is communicated with the fourth pipe orifice; and

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

2. The water purification system of claim 1, wherein the flush solenoid valve is a proportional solenoid valve.

3. The water purification system of claim 1, 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 waste water outlet.

4. The water purification system of claim 3, wherein the water outlet end of the second check valve is further 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.

5. The water purification system of claim 3, wherein the purified water outlet path is further connected to a first high-pressure switch, and the first high-pressure switch is electrically connected to the controller.

6. The water purification system of claim 5, further comprising a second high-pressure switch, wherein a water inlet end of the second high-pressure switch is communicated with the fourth 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 to the controller.

7. The water purification system of claim 5, wherein the first water inlet circuit is provided with a water inlet solenoid valve; the water inlet electromagnetic valve is electrically connected with the controller.

8. The water purification system of claim 1, wherein the first incoming water circuit is provided with a low pressure switch electrically connected to the controller.

9. The water purification system of claim 1, further comprising a fourth check valve, wherein a water inlet end of the fourth check valve is communicated with the second wastewater outlet, and a water outlet end of the fourth check valve is communicated with the first nozzle.

10. 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.

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