WO2022143370A1

WO2022143370A1 - Water purification system, and water purifier and control method therefor

Info

Publication number: WO2022143370A1
Application number: PCT/CN2021/140701
Authority: WO
Inventors: 王生乐
Original assignee: 追觅创新科技(苏州)有限公司
Priority date: 2020-12-31
Filing date: 2021-12-23
Publication date: 2022-07-07
Also published as: CN112830550B; CN112830550A

Abstract

Disclosed are a water purification system, and a water purifier and a control method therefor. The water purification system comprises: a first filtering member, wherein the first filtering member is provided with a raw water inlet, a waste water outlet and a pure water outlet, and when in an initial state, raw water is subjected to a first pressure facing the raw water inlet; a water intake conduit is in communication with the raw water inlet; a pure water conduit is in communication with the pure water outlet; a waste water conduit is in communication with the waste water outlet; a pump body is arranged on the water intake conduit and is used for applying, to the raw water, a second pressure facing the raw water inlet; and a water discharge conduit is in communication with the pure water outlet and is used for discharging pure water having an excessively high TDS value only by means of the first pressure when the pump body stops working, the second pressure being greater than the first pressure. By the above means, in the present invention, the washing of a filter element can be completed only by means of the water pressure of tap water during a period in which the water purifier stops producing water, such that the frequency of use of a booster pump is reduced, the interference of noise to a user is avoided, and the TDS value of the first cup of water can be ensured to be within a range suitable for drinking.

Description

Water purification system, water purifier and control method thereof

technical field

The invention relates to the technical field of water purification devices, in particular to a water purification system, a water purifier and a control method thereof.

Background technique

The flux of the reverse osmosis water purifier is getting bigger and bigger to meet people's higher and higher requirements for drinking water. Due to the characteristics of the reverse osmosis filter element, the high-flux reverse osmosis water purifier will be shut down for a period of time, and the first cup of water TDS (Total dissolved solids, total dissolved solids) connected by the user when making water again will be much higher. It is not conducive to the health of drinking water. How to achieve zero-stale water has become a major problem in the water purification industry. The reason for this problem is that impurities such as inorganic salt ions, bacteria, viruses, organic compounds and colloids are intercepted on the membrane surface to form the concentrated water side during the water purification process, forming a concentration difference with the pure water side of the membrane, and the retained solute will change from high concentration to high concentration. Forward osmosis on the low concentration side results in a high TDS on the pure water side.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the main purpose of the present invention is to provide a water purification system, a water purifier and a control method thereof, aiming to solve the problem that the TDS of the first cup of water is likely to be high after the traditional water purifier is shut down for a period of time .

In order to achieve the above purpose, a water purification system proposed by the present invention includes:

A first filter element, a filter element is installed in the first filter element for filtering raw water into pure water and waste water; the first filter element is provided with a raw water inlet, a waste water outlet and a pure water outlet, and the raw water is In the initial state, it is subjected to the first pressure towards the raw water inlet;

a water inlet pipe, communicated with the raw water inlet, and used to transport the raw water to the first filter element;

a pure water pipeline, communicated with the pure water outlet, and a first one-way valve and a high pressure switch are arranged on the pure water pipeline for transporting the pure water to the high pressure switch;

a waste water pipeline, communicated with the waste water outlet, and used for conveying the waste water, and a waste water solenoid valve is arranged on the waste water pipeline;

a pump body, arranged on the water inlet pipe, for applying a second pressure towards the raw water inlet to the raw water; and

A drain pipe, communicated with the pure water outlet, a drain solenoid valve is provided on the drain pipe, and the drain pipe is used to make the TDS value too high only by the first pressure when the pump body stops working The pure water is discharged; wherein, the second pressure is greater than the first pressure.

In one embodiment, the water outlet end of the drainage pipe is communicated with the waste water pipe and is connected to the water outlet end of the waste water solenoid valve;

The drainage pipeline is further provided with a second one-way valve, and the opening pressure of the second one-way valve is not greater than the first pressure; and/or;

A water inlet solenoid valve is provided on the water inlet pipe; and/or,

The water inlet pipe is provided with a filter assembly, the water outlet end of the filter assembly is communicated with the water inlet end of the pump body, and the filter assembly includes a second filter element and a third filter element arranged in series.

In one embodiment, a detection device is provided on the pure water pipeline, and the detection device is used to detect the TDS value of the pure water in the pure water pipeline.

In one embodiment, the detection device includes a TDS probe, and the TDS probe communicates with the pure water outlet, the pure water pipeline and the drainage pipeline through a four-way pipe.

The present invention also provides a water purifier, comprising:

case;

The water purification system, the water purification system is provided in the housing; and

The controller is electrically connected with the water purification system to control the operation of the water purification system.

The present invention also provides a method for controlling a water purifier, the water purifier includes a casing, a water purification system disposed in the casing, and a controller electrically connected to the water purification system; wherein the purifier The water system includes: a first filter element for filtering raw water to form pure water and waste water, the first filter element is provided with a raw water inlet, a waste water outlet and a pure water outlet, and the raw water is subjected to an initial state toward the The first pressure in the direction of the raw water inlet; the water inlet pipe is connected with the raw water inlet and is used to transport the raw water to the first filter element, and the water inlet pipe is provided with a water inlet solenoid valve; the pure water pipe , communicated with the pure water outlet, the pure water pipeline is provided with a first one-way valve and a high pressure switch, the pure water pipeline is used to transport the pure water to the high pressure switch; the waste water pipeline is connected with the waste water The outlet is connected to each other, and the waste water pipeline is provided with a waste water solenoid valve; the pump body is arranged on the water inlet pipeline, and is used for applying the second pressure to the raw water in the direction of the raw water inlet; and the drainage pipeline is connected to The waste water pipeline and the pure water outlet are provided with a drain solenoid valve and a second one-way valve, and the drain pipeline is connected to the outlet end of the waste water solenoid valve and is used in the pump body. During the shutdown period, only the first pressure is used to discharge the pure water whose TDS value is too high; wherein, the second pressure is greater than the first pressure;

Wherein, the control method includes the following steps:

It is detected that the water purifier stops producing water, and the duration of stopping water production is recorded;

When the duration of stopping water production reaches the first preset duration, the water inlet solenoid valve and the drain solenoid valve are controlled to open, and the pump body, the high-pressure switch and the waste water solenoid valve are controlled to be closed, so that the raw water is closed. The first filter element is only flushed under the action of the first pressure, and the drainage time is recorded;

When the drainage duration reaches a second preset duration, the water inlet solenoid valve, the pump body, the drainage solenoid valve, the high pressure switch and the drainage solenoid valve are controlled to be closed.

In one embodiment, after the steps of detecting that the water purifier stops producing water and recording the duration of stopping water production, when the time for stopping water production reaches a first preset duration, the water inlet solenoid valve and all the water inlet solenoid valves are controlled. Before the steps of opening the drain solenoid valve, controlling the pump body, the high pressure switch and the waste water solenoid valve to close, and recording the drain duration, the following steps are also included:

When the time for stopping water production is less than the first preset time, it is detected that the water purifier starts to produce water, and the recorded time for stopping water production is controlled to return to zero.

In one embodiment, it is detected that the water purifier stops producing water, and the step of recording the duration of stopping water production specifically includes:

It is detected that the water purifier stops producing water, the water inlet solenoid valve, the pump body and the waste water solenoid valve are controlled to open, the high pressure switch and the drain solenoid valve are controlled to be closed, and the flushing time is recorded; When the duration reaches the preset flushing duration, the water inlet solenoid valve, the pump body, the waste water solenoid valve, the high pressure switch and the drain solenoid valve are controlled to be closed, and the duration of stopping water production is recorded.

The present invention also provides a method for controlling a water purifier, the water purifier includes a casing, a water purification system disposed in the casing, and a controller electrically connected to the water purification system; wherein the purifier The water system includes: a first filter element for filtering raw water to form pure water and waste water; the first filter element is provided with a raw water inlet, a waste water outlet and a pure water outlet, and the raw water is subjected to a direction toward the The first pressure in the direction of the raw water inlet; the water inlet pipe is connected with the raw water inlet and is used to transport the raw water to the first filter element, and the water inlet pipe is provided with a water inlet solenoid valve; the pure water pipe , communicated with the pure water outlet, the pure water pipeline is provided with a first one-way valve and a high pressure switch, the pure water pipeline is used to transport the pure water to the high pressure switch; the waste water pipeline is connected with the waste water The outlet is connected to each other, and the waste water pipeline is provided with a waste water solenoid valve; the pump body is arranged on the water inlet pipeline, and is used for applying the second pressure to the raw water in the direction of the raw water inlet; and the drainage pipeline is connected to The waste water pipeline and the pure water outlet are provided with a drain solenoid valve and a second one-way valve, and the drain pipeline is connected to the outlet end of the waste water solenoid valve and is used in the pump body. During the shutdown period, only the first pressure is used to discharge the pure water whose TDS value is too high; wherein, the second pressure is greater than the first pressure; a detection device is provided on the pure water pipeline, and the detection device It is used to detect the TDS value of pure water in the pure water pipeline;

Wherein, the control method includes the following steps:

When the TDS value detected by the detection device exceeds a preset value, control the water inlet solenoid valve and the drain solenoid valve to open, and control the pump body, the high pressure switch and the waste water solenoid valve to close, so that the The raw water only washes the first filter element under the action of the first pressure, and records the drainage time;

In one embodiment, when the drainage time reaches a second preset time, the step of controlling the water inlet solenoid valve, the pump body, the drainage solenoid valve, the high pressure switch and the drainage solenoid valve to close It also includes the following steps:

If the time for stopping water production is less than the first preset time, it is detected that the water purifier starts to produce water, and the recorded time for stopping water production is reset to zero;

If the time for stopping water production reaches a first preset time, the water inlet solenoid valve and the drain solenoid valve are controlled to open, and the pump body, the high pressure switch and the waste water solenoid valve are controlled to be closed.

In the technical solution provided by the present invention, by connecting a drain pipe at the pure water outlet of the first filter element, when the pump body of the water purifier stops producing water for a period of time, the TDS value of the water in one side of the pure water pipe will increase. If the water pressure is too high, the pure water with high TDS value can be discharged by opening the drainage pipe through the water pressure of the tap water. When the user makes water again, the drinking water quality of the first cup of pure water obtained is more beneficial to the user. It only needs to connect the drainage pipe at the water purification outlet of the traditional water purification system, the structure is simple, and the disadvantage of frequent use of the pump body for flushing is avoided, and the water production and drainage of the water purification system can be automatically controlled by the controller. , the noise is low and there is no need for users to perform complex operations, and the user experience is better.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is a schematic diagram of the pipeline connection structure of the first embodiment of a water purification system provided by the present invention;

2 is a schematic diagram of a pipeline connection structure of a second embodiment of a water purification system provided by the present invention;

3 is a schematic flowchart of a first embodiment of a water purifier control method provided by the present invention;

FIG. 4 is a schematic flowchart of a second embodiment of the water purifier control method provided by the present invention.

The realization, functional characteristics and excellent effects of the present invention will be further described below with reference to specific embodiments and accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that, if there is a directional indication involved in the embodiment of the present invention, the directional indication is only used to explain the relative positional relationship, motion, etc. between the components under a certain posture. If the specific posture changes , the directional indication changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the meaning of "and/or" in the whole text includes three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or scheme satisfying both of A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The present invention provides a water purification system, a water purifier and a control method thereof. Figures 1 to 2 are embodiments of the water purification system provided by the present invention, and Figures 3 and 4 are schematic diagrams of the water purifier control method provided by the present invention. Example.

The water purifier provided by the present invention includes a casing, a water purification system 100 and a controller. The water purification system 100 is arranged in the casing, and the raw water is filtered through the water purification system 100 to obtain pure water that can be used by users; controlling The device is electrically connected to the water purification system 100 to control the operation of the pump body 14 and the valve bodies in the water purification system 100 . The connection structure between the controller and the water purification system 100 and the working principle thereof can all adopt the conventional technology, which will not be described in detail here. The present invention mainly lies in the improvement of the water purification system 100, and the specific structure of the water purification system 100 when applied to a water purifier will be described below.

1 to 2, in this embodiment, the water purification system 100 includes a first filter element 1, a water inlet pipe 2, a pure water pipe 3, a waste water pipe 4, a pump body 14 and a drainage pipe 5; the first A filter element is installed in the filter element 1, which is used to filter the raw water into pure water and waste water; the first filter element 1 is provided with a raw water inlet 101, a waste water outlet 102 and a pure water outlet 103. The water inlet pipe 2 is connected with the raw water inlet 101; the pure water pipe 3 is connected with the pure water outlet 103, and the pure water pipe 3 is provided with a first one-way valve 6 and a high pressure switch 11 for conveying pure water. The water goes to the high pressure switch 11; the waste water pipeline 4 is communicated with the waste water outlet 102 for conveying waste water, and the waste water pipeline 4 is provided with a waste water solenoid valve 8; The second pressure of the inlet 101, the pump body 14 can be set as a booster pump, and the raw water is transported to the raw water inlet 101 through the water inlet pipeline 2 through the pump body 14, so as to filter out waste water and pure water through the filter element, and the waste water is discharged through the waste water pipeline 4. For collection and processing, pure water is transported from the pure water pipe 3 to the water outlet of the water purifier for the user to receive water for drinking; the drain pipe 5 is connected to the pure water outlet 103, and the drain pipe 5 is provided with a drain solenoid valve 9, and the drain pipe 5 is used to discharge pure water with an excessively high TDS value only by the first pressure when the pump body 14 stops working. When the TDS value of the pure water in the pure water pipeline 3 is too high, the high pressure switch 11 is closed and the drain solenoid valve 9 is opened, so that the pure water with the high TDS value is discharged through the drain pipeline 5 .

In a specific application scenario, one end of the water inlet pipe 2 can be connected to the water outlet pipe of the municipal tap water, and since the tap water itself has a certain water pressure, the first pressure in this application is the water pressure of the tap water itself. That is to say, the solution in the present application is actually that when the pump body stops working, the raw water can flow to the waste water pipeline 4 through the first filter element 1 by means of its own water pressure. In this way, the phenomenon of frequently operating the pump body 14 to flush the first filter element 1 is avoided.

Compared with the conventional flushing scheme of continuing to control the operation of the pump body 14 or intermittently controlling the operation of the pump body 14 after stopping water production for a period of time, the pump body 14 in the present application stops working immediately after receiving the stop working. After the waste water pipe 4 is opened, the raw water can pass through the first filter element 1 for water production only by the first pressure (water pressure of tap water), thereby flushing the pure water side of the first filter element 1. The noise generated by the application is relatively small, and the impact on users is relatively small.

Based on this, in the technical solution provided by the present invention, a first filter element 1 is provided, and a filter element is arranged in the first filter element 1, and the raw water entering the first filter element 1 from the raw water inlet 101 is filtered through the filter element to filter out waste water and Pure water, pure water flows out from the pure water outlet 103, waste water flows out from the waste water outlet 102, raw water is transported to the raw water inlet 101 through the raw water pipeline, and a pump body 14 is provided on the raw water pipeline, and the pump body 14 can have a booster pump. The function is to transport the raw water to the raw water inlet 101, so that the raw water can be filtered through the filter element, and then the filtered waste water is discharged through the waste water pipeline 4, and the pure water is transported to the water inlet of the water purifier through the pure water pipeline 3 for supply. The user drinks; further, by connecting the drain pipe 5 at the pure water outlet 103 of the first filter element 1, when the water purifier stops producing water for a period of time, the TDS value of the water in the pure water pipe 3 will exceed high, the pure water with too high net TDS value can be discharged through the drainage pipe 5. When the user makes water again, to ensure the drinking water quality of the first cup of pure water obtained, it is more beneficial to the user's health; The water purification outlet of the water purification system 100 is connected to the drainage pipe 5, and the structure is simple, which is convenient for reconstruction on the basis of the existing water purification system 100, and is more cost-effective; when the water purification system 100 is applied to a water purifier, the The device can automatically control the water production and drainage of the water purification system 100, without the need for the user to perform complicated operations, and the user experience is better.

In one embodiment, a separate outlet can be set up at the water outlet end of the drainage pipe 5 to collect pure water with too high TDS.

In another embodiment, the water outlet end of the drainage pipe 5 can also be connected to the waste water pipe 4 and connected to the water outlet end of the waste water solenoid valve 8, so that the water purifier can only be provided with one water outlet, and the structure is simpler . When the waste water is normally discharged, the waste water solenoid valve 8 is opened, and the drain solenoid valve 9 is closed to discharge the waste water normally. After the water purifier stops producing water, the waste water solenoid valve 8 is closed, and the TDS of pure water is too high. When the temperature is reached, the drain solenoid valve 9 is opened, so that the pure water with too high TDS is discharged from the drain pipe 5 to the waste water pipe 4 for discharge.

In order to prevent waste water from entering the drainage pipe 5 or pure water with high TDS during normal water production, a second check valve 7 is provided on the drainage pipe 5 to prevent waste water from entering the pure water pipe 3 . Wherein, the opening pressure of the second one-way valve 7 is not greater than the first pressure, so as to ensure that the drainage pipe 5 can be conducted only by the water pressure of the municipal tap water when the pump body 14 is not working, thereby ensuring the flushing of the first filter element 1. process is coherent.

In this embodiment, a water inlet solenoid valve 10 is also provided on the water inlet pipe 2 to control the entry of the raw water of the water purification system 100.

And in order to ensure the purity of the water quality, before the raw water enters the first filter element 1, a filter assembly is provided on the water inlet pipe 2, and the water outlet end of the filter assembly is communicated with the water inlet end of the pump body 14. The second filter element 12 and the third filter element 13 are connected together. Specifically, the first filter element 1 can be a reverse osmosis filter device, wherein the filter element is a high-flux filter element with a flux greater than 400G, and the second filter element 12 and the third filter element 13 both include PP cotton filter elements, carbon rods or At least one of carbon fiber filter elements.

In order to conveniently and accurately judge whether the TDS value of the pure water in the pure water pipeline 3 is too high, please refer to FIG. The TDS value of the pure water, the detection result of the detection device 15 can be fed back to the controller, and the controller can control the opening of the drain solenoid valve 9 to drain water.

Specifically, the detection device 15 includes a TDS probe 151 , and the TDS probe 151 communicates with the pure water outlet 103 , the pure water pipeline 3 and the drainage pipeline 5 through the spool 16 . The TDS value of pure water is set to a predetermined value. When the TDS value detected by the TDS probe 151 exceeds the predetermined value, the water inlet solenoid valve 10 and the drain solenoid valve 9 are opened, and the pump body 14 is not opened. After passing through the filter element, pure water is formed to remove the old water with too high TDS. The predetermined value of the above-mentioned TDS probe 151 should not be higher than 15% of the TDS value of the raw water (when the water purifier is connected to tap water, it is tap water).

In order to have a clearer understanding of the water production process and drainage process in the water purifier, the present invention provides a water purifier control method, which controls the water production process and drainage process of the above water purifier. The following will combine the above water purification process. The specific structure of the machine will specifically describe the control method of the water purifier.

The structure of the water purifier will not be repeated here. Please refer to FIG. 3. In one embodiment, the control method of the water purifier includes the following steps:

S100. It is detected that the water purifier stops producing water, and the duration of stopping water production is recorded;

It should be noted that when it is detected that the water purifier stops producing water, the timing starts after the user receives the water for the last time.

S200, when the duration of stopping water production reaches the first preset duration, control the water inlet solenoid valve 10 and the drain solenoid valve 9 to open, control the pump body 14, the high pressure switch 11 and the waste water solenoid valve 8 to close, and record the drainage duration;

It should be noted that when the time for stopping water production reaches the first preset time period, the TDS value of the pure water in the pure water pipeline 3 will increase, which affects the health of drinking water with an ultra-high drinking standard. For example, the first preset duration can be set to 2 hours. If the user has not used pure water within 2 hours, the default is that the TDS value of the pure water on the pure water side is too high, and the controller controls the water intake. The solenoid valve 10 and the drain solenoid valve 9 are opened, the control pump body 14, the high pressure switch 11 and the waste water solenoid valve 8 are closed, and the raw water is subjected to the action of the tap water pressure, and will continue to make water to filter out new pure water and drain it away The original old water in the pure water pipeline 3 is drained away from the pure water with too high TDS, and the flushing of the first filter element 1 is completed.

S300 , when the drainage duration reaches the second preset duration, control the water inlet solenoid valve 10 , the pump body 14 , the drainage solenoid valve 9 , the high pressure switch 11 and the drainage solenoid valve 9 to close.

It should be noted that, similarly, the drainage volume can be controlled by controlling the drainage time, so as to avoid excessive drainage and waste water sources, or the drainage time is insufficient and the drainage is not clean. Generally, the second preset duration can be set to 40 seconds to 60 seconds to fully drain the old water, and then close the water inlet solenoid valve 10 , the pump body 14 , the drain solenoid valve 9 , the high pressure switch 11 and the waste water solenoid valve 8 , so as to start to time the stop water production time to enter the next cycle control.

The present invention records the duration of stopping water production, and controls whether the water purifier discharges water through the duration of stopping water production, so that the TDS value of the pure water in the pure water pipeline 3 is always maintained at a drinking standard, so that the user can obtain The water quality of the first glass is better, which is more conducive to the health of users.

After the step of S100, before the step of S200, the following steps are further included:

When the time for stopping water production is less than the first preset time, it is detected that the water purifier starts to produce water, and the recorded time for stopping water production is reset to zero.

For example, when the first preset duration is set to 2 hours, the user takes water again when the water production is stopped for half an hour or 1 hour. After the user has finished taking water, the timer will be restarted when it is turned on again.

In this embodiment, the steps of S100 specifically include:

When it is detected that the water purifier stops producing water, the water inlet solenoid valve 10, the pump body 14 and the waste water solenoid valve 8 are controlled to open, the high pressure switch 11 and the drain solenoid valve 9 are controlled to be closed, and the flushing duration is recorded; when the flushing duration reaches the preset flushing duration , control the water inlet solenoid valve 10, the pump body 14, the waste water solenoid valve 8, the high pressure switch 11 and the drain solenoid valve 9 to close, and record the duration of stopping water production.

It can be understood that, in order to reduce the environment where the filter element is soaked in a high TDS environment, the filter element can be washed first after the water purifier stops producing water. To replace the concentrated water on the waste water side, it can reduce the penetration of impurities such as inorganic salt ions, bacteria, viruses, organic compounds and colloids into the pure water side. The flushing time should not be too long to avoid wasting water, and it should not be too short, and the flushing is not thorough. Generally, it is reasonable to rinse for about 30 seconds. After the rinse is completed, start to count the time to stop water production.

Of course, in another embodiment, in order to ensure that the detection of the TDS value in the pure water pipeline 3 is more accurate and reliable, the detection device 15 can be used to detect the TDS value of the pure water in the pure water pipeline 3. When the detection device 15 is provided in the water system 100, the control method of the water purifier may include the following steps:

S100', when the TDS value detected by the detection device 15 exceeds the preset value, control the water inlet solenoid valve 10 and the drain solenoid valve 9 to open, control the pump body 14, the high pressure switch 11 and the waste water solenoid valve 8 to close, and record the drainage time length ;

The pure water in the pure water pipeline 3 is directly detected by the detection device 15. When the TDS value of the detected pure water exceeds the preset value, the controller controls the water inlet solenoid valve 10 and the drain solenoid valve 9 to open, and controls the pump The body 14, the high pressure switch 11 and the waste water solenoid valve 8 are closed, and new pure water is generated by the water pressure of the raw water, so as to drain away the pure water whose TDS is too high.

S200 ′, when the drainage duration reaches the second preset duration, control the water inlet solenoid valve 10 , the pump body 14 , the drainage solenoid valve 9 , the high pressure switch 11 and the drainage solenoid valve 9 to close.

Based on the same principle as above, the drainage time is controlled, and then the water production is stopped.

In this embodiment, the following steps are further included before the step of S200':

When it is detected that the water purifier stops producing water, record the length of time when water production is stopped;

If the water production stop time reaches the first preset time, the water inlet solenoid valve 10 and the drain solenoid valve 9 are controlled to open, and the pump body 14, the high pressure switch 11 and the waste water solenoid valve 8 are controlled to be closed.

Similarly, if the user starts to draw water when the time for stopping water production does not reach the first preset time period, the timer starts again; if the time for stopping water production reaches the first preset time period, each solenoid valve is controlled to work, for drainage.

Obviously, in the above two embodiments, before recording the duration of stopping water production, flushing can be performed to reduce the TDS of pure water.

And obviously, the above two embodiments can also be implemented in combination, that is, whether the water is drained can be controlled by the detection device 15 and the recording of the duration of stopping water production at the same time. For example, when the duration of stopping water production does not reach the first preset duration, and the detection device 15 detects that the TDS value of the pure water in the pure water pipeline 3 exceeds the preset value, the water inlet solenoid valve 10 and the drain solenoid valve 9 are controlled. Turn on, control the pump body 14, the high-pressure switch 11 and the waste water solenoid valve 8 to close to drain water; or, when the time period for stopping water production reaches the first preset time period, the pure water in the pure water pipeline 3 detected by the detection device 15 If the TDS value does not reach the preset value, the same can also be used to control the drainage through the controller. The two implementations are combined to implement double detection, the detection result is more reliable, and the drinking water health of the user is effectively guaranteed.

The present invention prepares pure water through the reverse osmosis filter element under the raw water pressure to drain the old water with high TDS in the reverse osmosis filter element, greatly improves the problem of high TDS in the first cup of water, and is safer to drink directly; Pure water, the high-flux reverse osmosis filter element has more considerable desalination rate and flux, less waste of water flow, and the TDS of the first cup of water is close to the range of pure water; and the pump body 14 does not work during the drainage process, which saves energy. The user experience is better, avoiding the wrong experience that the machine often starts up; and only the drain pipe 5, the drain solenoid valve 9 and the second one-way valve 7 are added to the pure water branch, the solution cost is low, and it is not temporarily used. The internal space of the water purifier does not increase the volume of the water purifier.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structures made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are the same as The principles are included in the scope of patent protection of the present invention.

Claims

A water purification system, comprising:

The first filter element is used to filter the raw water to form pure water and waste water; the first filter element is provided with a raw water inlet, a waste water outlet and a pure water outlet, and the raw water is subjected to the first filter toward the raw water inlet in the initial state. a pressure;

a water inlet pipe, communicated with the raw water inlet, and used to transport the raw water to the first filter element;

a pure water pipeline, communicated with the pure water outlet, and a first one-way valve and a high pressure switch are arranged on the pure water pipeline for transporting the pure water to the high pressure switch;

a waste water pipeline, communicated with the waste water outlet, and used for conveying the waste water, and a waste water solenoid valve is arranged on the waste water pipeline;

a pump body, arranged on the water inlet pipe, for applying a second pressure towards the raw water inlet to the raw water; and

A drain pipe, communicated with the pure water outlet, a drain solenoid valve is provided on the drain pipe, and the drain pipe is used to make the TDS value too high only by the first pressure when the pump body stops working of pure water discharged;

Wherein, the second pressure is greater than the first pressure.
The water purification system according to claim 1, wherein the water outlet end of the drainage pipe is communicated with the waste water pipe and is connected to the water outlet end of the waste water solenoid valve;

The drainage pipeline is further provided with a second one-way valve, and the opening pressure of the second one-way valve is not greater than the first pressure; and/or,

A water inlet solenoid valve is provided on the water inlet pipe; and/or,

The water inlet pipe is provided with a filter assembly, the water outlet end of the filter assembly is communicated with the water inlet end of the pump body, and the filter assembly includes a second filter element and a third filter element arranged in series.
The water purification system according to claim 2, wherein a detection device is provided on the pure water pipeline, and the detection device is used to detect the TDS value of the pure water in the pure water pipeline.
The water purification system according to claim 3, wherein the detection device comprises a TDS probe, and the TDS probe communicates with the pure water outlet, the pure water pipeline and the drainage pipeline through a four-way pipe .
A water purifier, comprising:

case;

The water purification system according to any one of claims 1 to 4, which is provided in the housing; and

The controller is electrically connected with the water purification system to control the operation of the water purification system.
A water purifier control method, characterized in that the water purifier comprises a casing, a water purification system arranged in the casing, and a controller electrically connected to the water purification system; wherein the purifier The water system includes: a first filter element for filtering raw water to form pure water and waste water, the first filter element is provided with a raw water inlet, a waste water outlet and a pure water outlet, and the raw water is subjected to an initial state toward the The first pressure in the direction of the raw water inlet; the water inlet pipe is connected with the raw water inlet and is used to transport the raw water to the first filter element, and the water inlet pipe is provided with a water inlet solenoid valve; the pure water pipe , communicated with the pure water outlet, the pure water pipeline is provided with a first one-way valve and a high pressure switch, the pure water pipeline is used to transport the pure water to the high pressure switch; the waste water pipeline is connected with the waste water The outlet is connected to convey the waste water, and the waste water pipeline is provided with a waste water solenoid valve; the pump body is arranged on the water inlet pipeline and is used to apply a second pump to the raw water toward the raw water inlet direction. pressure; and a drainage pipeline, which is connected to the waste water pipeline and the pure water outlet, the drainage pipeline is provided with a drainage solenoid valve and a second one-way valve, and the drainage pipeline is connected to the water outlet of the waste water solenoid valve, During the period when the pump body stops working, only the first pressure is used to discharge the pure water whose TDS value is too high; wherein, the second pressure is greater than the first pressure;

Wherein, the control method includes the following steps:

It is detected that the water purifier stops producing water, and the duration of stopping water production is recorded;

When the duration of stopping water production reaches the first preset duration, the water inlet solenoid valve and the drain solenoid valve are controlled to open, and the pump body, the high-pressure switch and the waste water solenoid valve are controlled to be closed, so that the raw water is closed. The first filter element is only flushed under the action of the first pressure, and the drainage time is recorded;

When the drainage duration reaches a second preset duration, the water inlet solenoid valve, the pump body, the drainage solenoid valve, the high pressure switch and the drainage solenoid valve are controlled to be closed.
The control method according to claim 6, characterized in that, after the steps of detecting that the water purifier stops producing water and recording the duration of stopping water production, when the time for stopping water production reaches the first preset duration, the control Before the steps of opening the water inlet solenoid valve and the drain solenoid valve, controlling the pump body, the high pressure switch and the waste water solenoid valve to close, and recording the drainage time, the following steps are also included:

When the time for stopping water production is less than the first preset time, it is detected that the water purifier starts to produce water, and the recorded time for stopping water production is controlled to return to zero.
The control method according to claim 6, wherein, when it is detected that the water purifier stops producing water, the step of recording the duration of stopping water production specifically comprises:

It is detected that the water purifier stops producing water, the water inlet solenoid valve, the pump body and the waste water solenoid valve are controlled to open, the high pressure switch and the drain solenoid valve are controlled to be closed, and the flushing time is recorded; When the duration reaches the preset flushing duration, the water inlet solenoid valve, the pump body, the waste water solenoid valve, the high pressure switch and the drain solenoid valve are controlled to be closed, and the duration of stopping water production is recorded.
A water purifier control method, characterized in that the water purifier comprises a casing, a water purification system arranged in the casing, and a controller electrically connected to the water purification system; wherein the purifier The water system includes: a first filter element for filtering raw water to form pure water and waste water; the first filter element is provided with a raw water inlet, a waste water outlet and a pure water outlet, and the raw water is subjected to a direction toward the The first pressure in the direction of the raw water inlet; the water inlet pipe is connected with the raw water inlet and is used to transport the raw water to the first filter element, and the water inlet pipe is provided with a water inlet solenoid valve; the pure water pipe , communicated with the pure water outlet, the pure water pipeline is provided with a first one-way valve and a high pressure switch, the pure water pipeline is used to transport the pure water to the high pressure switch; the waste water pipeline is connected with the waste water The outlet is connected to convey the waste water, and the waste water pipeline is provided with a waste water solenoid valve; the pump body is arranged on the water inlet pipeline and is used to apply a second pump to the raw water toward the raw water inlet direction. pressure; and a drainage pipeline, which is connected to the waste water pipeline and the pure water outlet, the drainage pipeline is provided with a drainage solenoid valve and a second one-way valve, and the drainage pipeline is connected to the water outlet of the waste water solenoid valve, When the pump body stops working, the pure water with too high TDS value is discharged only by the first pressure; wherein, the second pressure is greater than the first pressure; the pure water pipeline is provided with a detection device, the detection device is used to detect the TDS value of the pure water in the pure water pipeline;

Wherein, the control method includes the following steps:

When the TDS value detected by the detection device exceeds a preset value, control the water inlet solenoid valve and the drain solenoid valve to open, and control the pump body, the high pressure switch and the waste water solenoid valve to close, so that the The raw water only washes the first filter element under the action of the first pressure, and records the drainage time;

When the drainage duration reaches a second preset duration, the water inlet solenoid valve, the pump body, the drainage solenoid valve, the high pressure switch and the drainage solenoid valve are controlled to be closed.
The control method according to claim 9, wherein when the drainage time reaches a second preset time, the water inlet solenoid valve, the pump body, the drainage solenoid valve, the high pressure switch and the water inlet solenoid valve are controlled. The step of closing the drain solenoid valve further includes the following steps:

It is detected that the water purifier stops producing water, and the duration of stopping water production is recorded;

If the time for stopping water production is less than the first preset time, it is detected that the water purifier starts to produce water, and the recorded time for stopping water production is reset to zero;

If the time for stopping water production reaches the first preset time, the water inlet solenoid valve and the drain solenoid valve are controlled to open, and the pump body, the high pressure switch and the waste water solenoid valve are controlled to be closed.