CN208378491U

CN208378491U - Water purification system

Info

Publication number: CN208378491U
Application number: CN201820691448.6U
Authority: CN
Inventors: 柯岩; 赵汉旭; 蔡雪刚; 徐广飞
Original assignee: Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2018-05-09
Filing date: 2018-05-09
Publication date: 2019-01-15
Anticipated expiration: 2028-05-09

Abstract

The utility model discloses a water purification system. The water purification system comprises: a membrane filter element, which has a raw water port communicated with a raw water pipe, a pure water port communicated with a pure water pipe, and a waste water port communicated with a waste water pipe; The water valve is installed on the raw water pipe; the booster pump is installed on the raw water pipe on the water inlet side of the membrane filter element; the water intake switch is installed on the pure water pipe; the pure water return pipe, the water inlet end It is communicated with the pure water pipe between the membrane filter element and the water intake switch, and is connected to the first connection point of the pure water pipe, and its water outlet is communicated with the original water pipe between the booster pumps; pure water A return valve is installed on the pure water return pipe; and a water storage device is communicated with the pure water pipe between the water intake switch and the membrane filter element, and is connected to the second connection point of the pure water pipe. The technical scheme of the utility model can greatly reduce the TDS value of the first glass of water.

Description

Water purification system

Technical field

The utility model relates to technical field of water purification, in particular to a kind of water purification system.

Background technique

Drinking Water Problem is the problem of common people pay special attention to, and having many substances for being unfavorable for health in water has been thing out of question Real, this is also the hot root of the main reason for common people's healthy water consciousness is strengthened and purifier market.

It relies primarily on membrane filter in existing purifier to be filtered raw water, however, when the purifier is in standby When state, raw water, waste water and pure water can be existed simultaneously in the membrane filter, wherein raw water and waste water are in the film of membrane filter Before, after pure water is in the film of membrane filter, and raw water and the TDS value of waste water are intended to greatly be higher than the TDS value of pure water, if this is net Wetting system is in standby for a long time, and the ion that will lead in the raw water and waste water of membrane filter is diffused into pure water, in turn So that the TDS value of pure water increases, when being switched on Pure-water Making purifier next time, the TDS value for the first cup pure water produced can compare It is higher, influence the experience of user.

Utility model content

The main purpose of the utility model is to propose a kind of water purification system, it is intended to reduce what the water purification system was produced every time The TDS value of first cup pure water.

To achieve the above object, the utility model proposes a kind of water purification system, the water purification system includes:

Membrane filter has the raw water mouth being connected to raw water tubes, the pure water mouth being connected to pure water pipe and is connected to waste pipe Waste water mouth；

First inlet valve is installed on the raw water tubes；

Booster pump is installed on the raw water tubes between first inlet valve and the membrane filter；

Intake switch is installed in the pure water pipe；

Pure water return pipe, the pure water pipe between water inlet end and the membrane filter and the intake switch is connected to, and is connected In the first tie point of the pure water pipe, water outlet is connected to the raw water tubes of the booster pump influent side；

Pure water return valve is installed on the pure water return pipe；And

Water storage device, the pure water pipe between the intake switch and the membrane filter are connected to, and are connected to the pure water Second tie point of pipe.

Optionally, first tie point is between the membrane filter and second tie point.

Optionally, be also equipped with the first check valve in the pure water pipe, first check valve be located at the membrane filter and Between second tie point.

Optionally, the second inlet valve is additionally provided in the pure water pipe, second inlet valve is located at first tie point Between second tie point.

Optionally, the water purification system further includes controller, the controller respectively with first inlet valve, the increasing Press pump, second inlet valve, the intake switch and the pure water return valve are electrically connected, and the water purification system has a variety of Control model:

Replace first cup aqueous mode: when the controller receives the opening signal of the intake switch, triggering described first The control circuit of inlet valve, the booster pump and the pure water return valve, to control first inlet valve and the pure water Return valve is opened, and is controlled the booster pump and is kept working condition, and is controlled second inlet valve and closed；

When the controller receives the qualifying signal of pure water in the pure water return pipe, controls the pure water return valve and close It closes, and controls second inlet valve and open；

The controller receives the shutdown signal of the intake switch, and completely believes in the water for receiving the water storage device Number when, control complete machine it is standby or shutdown；

Dilute first cup aqueous mode: when the controller receives the opening signal of the intake switch, triggering described first Inlet valve, the booster pump, the control circuit of the pure water return valve and second inlet valve, with control described first into Water valve, second inlet valve and the pure water return valve are opened, and are controlled the booster pump and are kept working condition；

When the controller receives the qualifying signal of pure water in the pure water return pipe, controls the pure water return valve and close It closes；

The controller receives the shutdown signal of the intake switch, and completely believes in the water for receiving the water storage device Number when, control complete machine it is standby or shutdown.

Optionally, the water purification system further includes flow sensor, and the flow sensor is installed on the pure water reflux Guan Shang is considered as when the water flow by pure water return pipe reflux that the flow sensor measures reaches preset flow The controller receives the qualifying signal of pure water in the pure water return pipe；Or,

The water purification system further includes TDS sensor, and the TDS sensor is installed on the pure water return pipe, works as institute When stating the TDS value for the water through pure water return pipe reflux that flow sensor measures lower than default TDS value, it is considered as the control Device receives the qualifying signal of pure water in the pure water return pipe；Or,

The water purification system further includes the timer that timing is carried out to the return time to the pure water return pipe, works as institute When stating the calculating duration of timer and reaching preset duration, it is considered as the conjunction that the controller receives pure water in the pure water return pipe Lattice signal.

Optionally, the water purification system further includes detection device, and the detection device is installed on the intake switch and institute State in the pure water pipe between membrane filter, to detect pressure in the pure water pipe between the intake switch and the membrane filter or Flow velocity；

When the pressure in the pure water pipe between the intake switch and the membrane filter is greater than preset pressure, it is considered as described The water for controlling and receiving the water storage device expires signal；Or when in the pure water pipe between the intake switch and the membrane filter Flow velocity when being lower than preset flow rate, being considered as the water for controlling and receiving the water storage device expires signal.

Optionally, the water storage device is pressurized tank；Or,

The water storage device is water drive tank, and the water drive tank includes having the shell of inner cavity and being movably installed in the shell Intracorporal movable part, the movable part is by the inner cavity of the shell every being set as mutually independent first water storage cavity and the second water storage Chamber, first water storage cavity are connected to by the first pipeline with the pure water pipe, and second water storage cavity passes through the second pipeline and water Source connection.

Optionally, the water purification system further includes third pipeline, and the water inlet end and the raw water tubes of the third pipeline connect Logical, the water outlet of the third pipeline is connected to the pure water return pipe, and the third pipeline is equipped with pressure reducing valve；

First inlet valve is located between the water inlet end of the third pipeline and the water outlet of the pure water return pipe On raw water tubes.

Optionally, second one-way valve is also equipped on the third pipeline.

Optionally, the water purification system further includes return of waste water pipe, one end of the return of waste water pipe and the waste pipe Connection, the other end are connected to the raw water tubes of the booster pump influent side.

In the utility model, for replacing first cup aqueous mode, by the initial stage opened in intake switch, to membrane filter It is constantly rinsed, and the pure water after flushing constantly passes through pure water return pipe and carries out reflux and filter, so that head made from membrane filter The TDS value of cup water further decreases, and can satisfy user demand；Alternatively, for diluting first cup aqueous mode, it is pure in water storage device Water flow is to pure water pipe, and pure water made from membrane filter is due to the pressure effect being discharged by water storage device, largely can be through pure water Before return line flows back into booster pump, into membrane filter again water processed, only sub-fraction pure water can be discharged mixed with water storage device It closes, is flowed out from intake switch.Since intake switch water outlet is largely the low TDS value pure water that water storage device goes out, only one small portion It point is the higher first cup water of TDS of system brand-new, therefore the TDS value of the pure water gone out after mixing from intake switch will be far below first cup Water, therefore the TDS value for the pure water that consumer picks up at this time is very low, therefore user demand can be met.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the structural schematic diagram of the utility model water purification system first embodiment；

Fig. 2 is the structural schematic diagram of the utility model water purification system second embodiment；

Fig. 3 is the structural schematic diagram of water storage device in Fig. 2；

Fig. 4 is the structural schematic diagram of the utility model water purification system 3rd embodiment；

Fig. 5 is the structural schematic diagram of the utility model water purification system fourth embodiment；

Fig. 6 is the structural schematic diagram of the 5th embodiment of the utility model water purification system；

Fig. 7 is the structural schematic diagram of the utility model water purification system sixth embodiment.

Drawing reference numeral explanation:

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, fall within the protection scope of the utility model.

It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture) Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.

In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve The combination of case is not present, also not within the protection scope of the requires of the utility model.

The utility model proposes a kind of water purification systems, please refer to Fig. 1, show the water purification system first of the utility model The structural schematic diagram of embodiment, the water purification system include membrane filter 11, booster pump 12, the first inlet valve 13, intake switch 14, The components such as pure water return valve 15, water storage device 16.

Membrane filter 11 has raw water mouth, pure water mouth and waste water mouth；Wherein, the raw water mouth of membrane filter 11 and raw water tubes a be (i.e. Running water pipe or the water pipe being connected to water source) connection；The pure water mouth of membrane filter 11 is connected to pure water pipe b, for membrane filter 11 The pure water discharge produced；The waste water mouth of membrane filter 11 is connected to waste pipe c, for the waste water generated when 11 Pure-water Making of membrane filter Discharge.

Booster pump 12 is installed on raw water tubes a, preferably, booster pump 12 be installed on membrane filter 11 and the first inlet valve 13 it Between raw water tubes a on, booster pump 12 not only drives the raw water in raw water tubes a to flow into membrane filter 11, but also original can be improved Raw water hydraulic pressure in water pipe a, it is sufficiently high with the raw water hydraulic pressure for ensuring to flow into membrane filter 11, and then ensure that membrane filter 11 can be just Normal Pure-water Making.

Preferably, booster pump 12 be freq uency conversion supercharging pump 12, due to freq uency conversion supercharging pump 12 frequency be it is adjustable, be thus convenient for User adjusts the working frequency of freq uency conversion supercharging pump 12 according to their own needs, when needing to obtain a large amount of pure water in user's short time When, the working frequency that freq uency conversion supercharging can be pumped 12 by user is turned up, and passes through the original of freq uency conversion supercharging pump 12 within the unit time at this time Water water can be relatively more, thus ensure that the raw water water entered in membrane filter 11 in the unit time can also accordingly increase, into And be conducive to improve the pure water amount obtained in 11 unit time of membrane filter；When the pure water amount for needing to obtain in user's short time compared with When few, user can be turned down the working frequency that freq uency conversion supercharging pumps 12, pass through freq uency conversion supercharging pump 12 within the unit time at this time Raw water water is fewer, but the raw water entered in membrane filter 11 can be filtered adequately, and then is conducive to improve water money The utilization rate in source.

First inlet valve 13 can be solenoid valve, be also possible to mechanical valve, not do specific limit to the first inlet valve at this Fixed, the first inlet valve 13 is installed on raw water tubes a, in the open state in water purification system Pure-water Making, in water purification system It is in close state when uniting standby.

Intake switch 14 can be solenoid valve, be also possible to mechanical valve, not do specific restriction to intake switch 14 at this； Intake switch 14 is installed on the water outlet of pure water pipe b, in the open state when user takes pure water, fetches water and ties in user It is in close state when beam.

Further, water purification system is additionally provided with pure water return pipe d, the water inlet end of pure water return pipe d and membrane filter 11 and takes Pure water pipe b connection between taps 14, and it is connected to the first tie point of pure water pipe b, water outlet and booster pump 12 are intake The raw water tubes a of side is connected to, and specifically, pure water return pipe d may connect to the raw water tubes between booster pump 12 and the first inlet valve 13 a。

Pure water return valve 15 is installed on pure water pipe b, and pure water return valve 15 can be solenoid valve, is also possible to mechanical valve, At this specific restriction is not done to pure water return valve 15；What pure water return valve 15 was used to control pure water return pipe d beats on or off It closes.

Water storage device 16 is for storing pure water, the pure water pipe b between water storage device 16 and intake switch 14 and membrane filter 11 Connection, and it is connected to the second tie point of pure water pipe b.Specifically, water storage device 16 can be pressurized tank, and pressurized tank passes through the first pipe Road e is connected to pure water pipe b；Certainly, water storage device 16 can also be water drive tank, please with reference to Fig. 2 and Fig. 3, water drive tank it include Shell 161 with inner cavity and the movable part 162 being movably installed in shell 161, movable part 162 is by the inner cavity of shell 161 Every being set as mutually independent first water storage cavity 161a and the second water storage cavity 161b, wherein the first water storage cavity 161a passes through the first pipe Road e is connected to pure water pipe b, and the second water storage cavity 161b is connected to by the second pipeline f with water source.It should be noted that movable part 162 Can be diaphragm, piston or other the structure of deformation can be moved or can generated under the impact of fluid, herein just not It enumerates, since movable part 162 is movably installed in shell 161, this allows for movable part 162 in the first water storage cavity The hydraulic pressure in hydraulic pressure and the second water storage cavity 161b in 161a when there is pressure difference can activity so that the first water storage cavity A high meeting of hydraulic pressure squeezes out the water in low one of hydraulic pressure in 161a and the second water storage cavity 161b.

At the end of user's water intaking, intake switch 14 is closed, the first inlet valve 13 is kept open, pure water is returned Stream valve 15 continues to remain off, while booster pump 12 being kept it turned on, so that membrane filter 11 can continue to produce Pure water, and the pure water that membrane filter 11 is produced is entered in the first water storage cavity 161a or pressurized tank by the first pipeline e；When first When either pressurized tank is provided with default pure water amount in water storage cavity 161a, control complete machine is standby or shuts down.

In this embodiment, when user needs to take pure water, intake switch 14, the first inlet valve 13 and pure water are flowed back Valve 15 opens simultaneously, while booster pump 12 being opened, and booster pump 12 drives the raw water in raw water tubes a to flow into membrane filter 11, film A part of pure water made from filter core 11 flows to intake switch 14 from pure water pipe b, another part pure water then pass through pure water return pipe d into Row reflux；Simultaneously as the opening of intake switch 14, water storage device 16 can be discharged immediately, the pure water flow direction in water storage device 16 Pure water pipe b, and pure water made from membrane filter 11 can largely be returned due to the pressure effect being discharged by water storage device 16 through pure water Before the road flow tube d flows back into booster pump 12, into membrane filter 11 again water processed, only sub-fraction pure water can go out with water storage device 16 Water mixing, flows out from intake switch 14.Since the water outlet of intake switch 14 is largely the low TDS value pure water that water storage device 16 goes out, The only sub-fraction higher first cup water of TDS that is system brand-new, therefore the TDS value of the pure water gone out after mixing from intake switch 14 It to be far below first cup water, therefore the TDS value for the pure water that consumer picks up at this time is very low, therefore user demand can be met.In addition, membrane filtration Core 11 also generates waste water while pure water is made to raw water filtration, waste water is discharged by waste pipe c.

Preferably, the first check valve 17 is also equipped on pure water pipe b, the first check valve 17 is located at the second tie point and membrane filtration Between core 11.In the present embodiment, the first tie point is between membrane filter 11 and the second tie point, the preferred position of the first check valve 17 It is flowed back into pure water return pipe d between the first tie point and the second tie point, and to limit the pure water in water storage device 16 In membrane filter 11.In addition, being equipped with third check valve 19 on pure water return pipe d, filtered with limiting raw water without membrane filter 11 And pure water pipe b directly is flowed to from pure water return pipe d.

Fig. 4 and Fig. 5 are please referred to, further, the second inlet valve 29 is additionally provided on pure water pipe b, the first tie point is located at film Between filter core 11 and the second tie point, the second inlet valve 29 is between the first tie point and the second tie point.Second inlet valve 29 can be solenoid valve, be also possible to mechanical valve, not do specific restriction to the second inlet valve 29 at this.

In another embodiment, when user needs to take pure water, intake switch 14, the first inlet valve 13 and pure water are returned Stream valve 15 opens simultaneously, and the second inlet valve 29 is closed, while booster pump 12 being opened, and booster pump 12 drives in raw water tubes a Raw water flows into membrane filter 11, and all pure water made from membrane filter 11 flow back into raw water tubes a from pure water return pipe d, meanwhile, by In the opening of intake switch 14, water storage device 16 can be discharged immediately, and the pure water in water storage device 16 flows to pure water pipe b and water intaking is opened 14 are closed, with the water intaking demand of summary responses user.When the TDS value of the pure water made from the membrane filter 11 meets user demand, or system The water time reaches preset value, or the pure water flow of reflux reaches preset value, and the second inlet valve 29 is opened, and by pure water return valve 15 close, so that all pure water made from membrane filter 11 are flowed out from intake switch 14.So in this process, consumer connects The TDS value of the pure water taken is very low, therefore can meet user demand.

In view of user is when using water purification system, the element that section control water purification system is different in different times is needed It is turned on or off, thus brings inconvenience to users, in consideration of it, the water purification system of the utility model further includes controller (not shown), controller can be single-chip microcontroller or PWM controller, controller respectively with the first inlet valve in water purification system 13, booster pump 12, intake switch 14, the second inlet valve 29 and pure water return valve 15 are electrically connected, and controller is in water purification system When in different conditions, the corresponding component work of control water purification system.It is carried out below with two different control models specific Explanation.

Replace first cup aqueous mode: when user needs to fetch water, it will usually open intake switch 14, controller receives water intaking When the opening signal of switch 14, the control circuit of the first inlet valve 13 of triggering, booster pump 12 and pure water return valve 15, with control First inlet valve 13 and pure water return valve 15 are opened, and control booster pump 12 keeps working condition, and are controlled the second inlet valve 29 and closed It closes；So that raw water is entered in membrane filter 11 and is filtered by raw water tubes a, the pure water that membrane filter 11 is produced passes through pure water Return pipe d flows back into the influent side of booster pump 12, and waste water caused by 11 Pure-water Making of membrane filter then passes through waste pipe c and is discharged.

When the TDS value of the pure water of 11 water outlet side of membrane filter reaches user demand, that is, when controller receives pure water In return pipe d when the qualifying signal of pure water, control pure water return valve 15 is closed, and is controlled the second inlet valve 29 and opened, so that Pure water pipe b is normally discharged.In above process, when controller receives the opening signal of intake switch 14, water storage device 16 Interior pure water can flow out to intake switch 14 automatically, with for users to use, so as to avoid opened in intake switch 14 and the The occurrence of user can not take pure water in this period that two inlet valves 29 are closed, to substantially reduce user's waiting Time.

At the end of user's water intaking, it will usually close intake switch 14, controller receives the closing of intake switch 14 When signal, controller continues to control the first inlet valve 13, the second inlet valve 29 opening, and booster pump 12 continues working, pure water reflux Valve 15 is closed, i.e., system continues Pure-water Making, and pure water made from membrane filter 11 flows to the storage of water storage device 16.When controller receives When expiring signal (can specifically be detected by pressure sensor or flow sensor) to the water of water storage device 16, control complete machine is waited for Machine or shutdown, i.e. system stop water processed, and the pure water in water storage device 16 is then in case next intake switch 14 is supplied to use when opening Family uses.

Dilute first cup aqueous mode: when user needs to fetch water, it will usually open intake switch 14, controller receives water intaking When the opening signal of switch 14, the first inlet valve 13, booster pump 12, the control of pure water return valve 15 and the second inlet valve 29 are triggered Circuit processed is opened with controlling the first inlet valve 13, the second inlet valve 29 and pure water return valve 15, and control booster pump 12 keeps work State；Booster pump 12 drives the raw water in raw water tubes a to flow into membrane filter 11, and a part of pure water made from membrane filter 11 is from pure water Pipe b flows to intake switch 14, and another part pure water then passes through pure water return pipe d and flows back；Simultaneously as intake switch 14 It opens, water storage device 16 can be discharged immediately, and the pure water in water storage device 16 flows to pure water pipe b, and pure water made from membrane filter 11 Due to the pressure effect being discharged by water storage device 16, before largely flowing back into booster pump 12 through the road pure water return pipe d, enter Again water processed, only sub-fraction pure water can be discharged with water storage device 16 and mix, flow out from intake switch 14 membrane filter 11.Due to Intake switch 14 water outlet be largely water storage device 16 go out low TDS value pure water, only sub-fraction be system brand-new TDS compared with High first cup water, therefore the TDS value of the pure water gone out after mixing from intake switch 14 will be far below first cup water, therefore consumer at this time The TDS value of the pure water picked up is very low, therefore can meet user demand.In addition, while pure water is made to raw water filtration in membrane filter 11 Waste water is also generated, waste water is discharged by waste pipe c.

When first cup water is filtered completely, and the TDS value of the pure water of 11 water outlet side of membrane filter reaches user demand, that is, when When controller receives the qualifying signal of pure water in pure water return pipe d, control pure water return valve 15 is closed.

At the end of user's water intaking, it will usually close intake switch 14, controller receives the closing of intake switch 14 When signal, controller continues to control the first inlet valve 13, the second inlet valve 29 opening, and booster pump 12 continues working, pure water reflux Valve 15 is closed, i.e., system continues Pure-water Making, and pure water made from membrane filter 11 flows to the storage of water storage device 16.When controller receives When expiring signal to the water of water storage device 16, control complete machine is standby or shutdown, i.e. system stop water processed, the pure water in water storage device 16 Then in case next intake switch 14 is supplied to user's use when opening.

In the utility model, to determine first cup hydration lattice, can specifically be carried out by following various ways.

Mode one: water purification system further includes flow sensor (not shown go out), and flow sensor is installed on pure water return pipe d On, when the water flow by pure water return pipe d reflux that flow sensor measures reaches preset flow, it is considered as controller reception The qualifying signal of pure water in pure water return pipe d.Since under different temperature and pressures, the flow velocity of water is different, therefore identical Period in water flow be also different, therefore further, water purification system further includes temperature sensor and pressure sensor, Temperature sensor and pressure sensor are mounted on pure water return pipe d, are stored in controller to characterize pressure, temperature With first cup water volume (i.e. preset flow) table of comparisons of pressure-temperature-of first cup water volume (i.e. preset flow) corresponding relationship, work as stream When the water flow by pure water return pipe d reflux that quantity sensor measures reaches preset first cup water volume (i.e. preset flow), It is considered as the qualifying signal that controller receives pure water in pure water return pipe d.

Mode two: water purification system further includes the timer that timing is carried out to the return time to pure water return pipe d, works as meter When device calculating duration when reaching preset duration, be considered as the qualifying signal that controller receives pure water in pure water return pipe d.

Mode three: water purification system further includes TDS sensor (not shown go out), and TDS sensor is installed on pure water return pipe d On, when the TDS value for the water through pure water return pipe d reflux that flow sensor measures is lower than default TDS value, it is considered as controller and connects Receive the qualifying signal of pure water in the pure water return pipe.

Further, water purification system further includes detection device 22, and detection device 22 is installed on intake switch 14 and membrane filter On pure water pipe b between 11, to detect pressure or flow in the pure water pipe b between intake switch 14 and membrane filter 11；When The pressure in pure water pipe b between intake switch 14 and membrane filter 11 is greater than preset pressure (preset pressure is first pressure) When, it is considered as and controls and receives the water of water storage device 16 and expire signal；Or as the pure water pipe b between intake switch 14 and membrane filter 11 When interior flow velocity is lower than preset flow rate, being considered as controller and receiving the water of water storage device 16 expires signal.Specifically, detection device 22 It can be pressure sensor, high-voltage switch gear either flow sensor.It should be noted that generally measured due to flow sensor It is flow velocity, after 16 water of water storage device is full, water is flowed out in pure water pipe b, pure water pipe b is full of, so that membrane filter 11 is made Pure water can not reach in pure water pipe b, therefore be equivalent in pure water pipe b non-water flow and flow, the flow velocity in pure water pipe b is lower at this time, Therefore it can determine that the water for receiving water storage device 16 for controller expires signal.

In the present embodiment, when the pressure in the pure water pipe b between intake switch 14 and membrane filter 11 is lower than preset second When pressure, it is considered as and controls and receives water signal processed, that is, after the opening of intake switch 14, is equivalent to pure water pipe b and atmosphere connects Logical, the pressure in pure water pipe b can decline.Alternatively, in other embodiments, the pure water between intake switch 14 and membrane filter 11 When flow velocity in pipe b is greater than preset flow rate, it is considered as and controls and receives water signal processed.

Fig. 6 and Fig. 7 are please referred to, further, water purification system further includes third pipeline g, the water inlet end and original of third pipeline g Water pipe a connection, the water outlet of third pipeline g are connected to pure water return pipe d, and third pipeline g is equipped with pressure reducing valve 23, and pressure reducing valve 23 are arranged in parallel with the first inlet valve 13, that is to say, that the first inlet valve 13 is located at water inlet end and the pure water reflux of third pipeline g On raw water tubes a between the water outlet of pipe d.Specifically, when pure water return valve 15 is opened, the first inlet valve 13 is closed, is subtracted Pressure valve 23 keeps work, and raw water is converged after the decompression of pressure reducing valve 23 with the pure water in pure water return pipe d, due to raw water pressure compared with It is low, therefore the back pressure of pure water reflux can be reduced, and then improve pure water back-flow velocity.After pure water return valve 15 is closed, by first Inlet water solenoid valve is opened.

Second one-way valve 18 is also equipped on third pipeline g.Second one-way valve 18 along third pipeline g water inlet to water side To conducting, to forbid pure water to flow back into third pipeline g.In the embodiment, the third check valve 19 on pure water return pipe d is then located at Between the water inlet end of pure water return pipe d and the water outlet of third pipeline g, to prevent the raw water flowed out from third pipeline g via pure Water return pipe d flows to pure water pipe b.

In the embodiment, due to being provided with third pipeline g and pressure reducing valve 23, then mode among the above is accordingly changed.

Replace first cup aqueous mode: when user needs to fetch water, it will usually open intake switch 14, controller receives water intaking When the opening signal of switch 14, the control circuit of triggering booster pump 12, the first inlet valve 13 and pure water return valve 15, with control First inlet valve 13 is closed, pure water return valve 15 is opened, and control booster pump 12 keeps working condition, and controls the second inlet valve 29 It closes；So that raw water is entered in membrane filter 11 and is filtered by third pipeline g, the pure water that membrane filter 11 is produced passes through Pure water return pipe d flows back into the influent side of booster pump 12, waste water caused by 11 Pure-water Making of membrane filter then passes through waste pipe c Discharge.

After first cup water is completely replaced, when the TDS value of the pure water of 11 water outlet side of membrane filter reaches user demand, that is, When controller receives the qualifying signal of pure water in pure water return pipe d, control pure water return valve 15 close, and control first into Water valve 13 and the second inlet valve 29 are opened, so that pure water pipe b is normally discharged.In above process, it is taken when controller receives When the opening signal of taps 14, the pure water in water storage device 16 can flow out to intake switch 14 automatically, with for users to use, So as to avoid intake switch 14 open and the second inlet valve 29 close this period in user can not take pure water feelings The generation of condition, to substantially reduce the time of user's waiting.

Dilute first cup aqueous mode: when user needs to fetch water, it will usually open intake switch 14, controller receives water intaking When the opening signal of switch 14, pressure reducing valve 23, booster pump 12, the control electricity of pure water return valve 15 and the second inlet valve 29 are triggered Road is opened with controlling pressure reducing valve 23, the second inlet valve 29 and pure water return valve 15, and control booster pump 12 keeps working condition；Increase Press pump 12 drives the raw water in third pipeline g to flow into membrane filter 11, and a part of pure water made from membrane filter 11 is flowed from pure water pipe b To intake switch 14, another part pure water then passes through pure water return pipe d and flows back；Simultaneously as the opening of intake switch 14, Water storage device 16 can be discharged immediately, and the pure water in water storage device 16 flows to pure water pipe b, and pure water made from membrane filter 11 due to by The pressure effect being discharged to water storage device 16, before largely flowing back into booster pump 12 through the road pure water return pipe d, into membrane filter 11 water processed again, only sub-fraction pure water can be discharged with water storage device 16 and mixs, from the outflow of intake switch 14.Since water intaking is opened Closing 14 water outlets is largely the low TDS value pure water that water storage device 16 goes out, only the sub-fraction higher head of TDS that is system brand-new Cup water, therefore the TDS value of the pure water gone out after mixing from intake switch 14 will be far below first cup water, therefore consumer picks up at this time The TDS value of pure water is very low, therefore can meet user demand.In addition, also being generated while pure water is made to raw water filtration in membrane filter 11 Waste water, waste water are discharged by waste pipe c.

When the TDS value of the pure water of 11 water outlet side of membrane filter reaches user demand, that is, when controller receives pure water In return pipe d when the qualifying signal of pure water, control pure water return valve 15 is closed, and is controlled the first inlet valve 13 and opened.

Waste pipe c is equipped with wastewater valve 24, to control the discharge of waste water.Further, water purification system is also provided with useless One end of water return pipe h, return of waste water pipe h are connected to waste pipe c, and the other end is connected to the raw water tubes a of 12 influent side of booster pump. Return of waste water pipe h is for being connected to waste pipe c and raw water tubes a, so that effluent part reflux is net to be promoted when water purification system water The pure water recovery rate of water system.A settable waste water proportional valve 21 on return of waste water pipe h, waste water proportional valve 21 is for limiting back Flow the flow of waste water.

In order to extend the service life of membrane filter 11, in an embodiment of the utility model, before water purification system further includes Filter core 26 is set, front filter element 26 is installed on raw water tubes a.It should be noted that the quantity of front filter element 26 can be one or Person is multiple, and front filter element 26 can be PP cotton filter element, active carbon filter core or other filter cores with filtering function, does not do herein It is specific to limit.Front filter element 26 is set before membrane filter 11, this makes it possible to effectively filter out large granular impurity in raw water, And then avoid granule foreign in raw water and be attached in membrane filter 11, and the problem for causing membrane filter 11 blocked occurs, into And the problem of shortening 11 service life of membrane filter appearance.

In order to promote the mouthfeel of pure water, in an embodiment of the utility model, water purification system further includes postposition filter core 27, Postposition filter core 27 is serially connected on pure water pipe b.It should be noted that the quantity of postposition filter core 27 can be one or more.Afterwards Setting filter core 27 can be active carbon filter core, and active carbon filter core can be gone remaining in water removal mainly using active carbon as primary raw material Chlorine, peculiar smell etc., while the mouthfeel of water can also be improved, and then be conducive to be promoted the experience of user.

The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all Under the inventive concept of the utility model, equivalent structure transformation made based on the specification and figures of the utility model, or Directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims

1. a water purification system, is characterized in that, described water purification system comprises:

The membrane filter element has a raw water port communicated with the raw water pipe, a pure water port communicated with the pure water pipe, and a waste water port communicated with the waste water pipe;

a first water inlet valve, installed on the raw water pipe;

a booster pump, installed on the raw water pipe between the first water inlet valve and the membrane filter element;

a water intake switch, installed on the pure water pipe;

A pure water return pipe, the water inlet end of which is connected to the pure water pipe between the membrane filter element and the water intake switch, and is connected to the first connection point of the pure water pipe, and the water outlet end of which is connected to the booster pump The raw water pipe on the water inlet side is connected;

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

The water storage device is communicated with the pure water pipe between the water intake switch and the membrane filter element, and is connected to the second connection point of the pure water pipe.

2. The water purification system of claim 1, wherein the first connection point is located between the membrane cartridge and the second connection point.

3 . The water purification system according to claim 2 , wherein a first check valve is also installed on the pure water pipe, and the first check valve is located between the membrane filter element and the second connection. 4 . between points.

4 . The water purification system according to claim 2 , wherein a second water inlet valve is further provided on the pure water pipe, and the second water inlet valve is located between the first connection point and the second water inlet valve. 5 . between two connection points.

5. The water purification system according to claim 4, characterized in that, the water purification system further comprises a controller, the controller is respectively connected with the first water inlet valve, the booster pump, the The second water inlet valve, the water intake switch and the pure water return valve are electrically connected, and the water purification system has various control modes:

Replacing the first cup of water mode: when the controller receives the opening signal of the water intake switch, it triggers the control circuits of the first water inlet valve, the booster pump and the pure water return valve to control the The first water inlet valve and the pure water return valve are opened, the booster pump is controlled to maintain a working state, and the second water inlet valve is controlled to be closed;

When the controller receives the qualified signal of pure water in the pure water return pipe, it controls the pure water return valve to close, and controls the second water inlet valve to open;

The controller receives the closing signal of the water intake switch, and controls the whole machine to stand by or shut down when receiving the water full signal of the water storage device;

Dilution first cup of water mode: when the controller receives the opening signal of the water intake switch, it triggers the first water inlet valve, the booster pump, the pure water return valve and the second water inlet valve The control circuit is used to control the opening of the first water inlet valve, the second water inlet valve and the pure water return valve, and control the booster pump to maintain the working state;

When the controller receives the qualified signal of pure water in the pure water return pipe, it controls the pure water return valve to close;

The controller receives the closing signal of the water intake switch, and when receiving the water full signal of the water storage device, controls the whole machine to stand by or shut down.

6. The water purification system according to claim 5, characterized in that, the water purification system further comprises a flow sensor, the flow sensor is installed on the pure water return pipe, when the flow rate measured by the flow sensor is measured. When the water flow rate returned by the pure water return pipe reaches the preset flow rate, it is deemed that the controller has received a qualified signal of pure water in the pure water return pipe; or,

The water purification system further includes a TDS sensor, and the TDS sensor is installed on the pure water return pipe. When the TDS value of the water returned through the pure water return pipe measured by the flow sensor is lower than a preset TDS value, it is deemed that the controller has received the qualified signal of pure water in the pure water return pipe; or,

The water purification system further includes a timer for timing the return time of the pure water return pipe. When the calculated time of the timer reaches a preset time, it is deemed that the controller has received the pure water. Pass signal for pure water in the water return line.

7. The water purification system according to claim 5, characterized in that, the water purification system further comprises a detection device, and the detection device is installed on the pure water pipe between the water intake switch and the membrane filter element, To detect the pressure or flow rate in the pure water pipe between the water intake switch and the membrane filter element;

When the pressure in the pure water pipe between the water intake switch and the membrane filter element is greater than the preset pressure, it is deemed that the control has received the water full signal of the water storage device; or when the water intake switch and the When the flow rate in the pure water pipe between the membrane filter elements is lower than the preset flow rate, it is deemed that the control has received the water full signal of the water storage device.

8. The water purification system of claim 1, wherein the water storage device is a pressure tank; or,

The water storage device is a water drive tank, and the water drive tank includes a housing with an inner cavity and a movable piece movably installed in the housing, and the movable piece separates the inner cavity of the housing into mutually An independent first water storage cavity and a second water storage cavity, the first water storage cavity is communicated with the pure water pipe through a first pipeline, and the second water storage cavity is communicated with a water source through a second pipeline.

9 . The water purification system according to claim 1 , wherein the water purification system further comprises a third pipeline, the water inlet end of the third pipeline is communicated with the raw water pipeline, and the third pipeline The water outlet end of the pipeline is communicated with the pure water return pipe, and the third pipeline is provided with a pressure reducing valve;

The first water inlet valve is located on the raw water pipe between the water inlet end of the third pipeline and the water outlet end of the pure water return pipe.

10. The water purification system according to claim 9, wherein a second check valve is further installed on the third pipeline.