Water purification system and water purification method

Abstract

The invention provides a water purification system and a water purification method.The water purification system comprises a water purification pipe set, the water purification pipe set comprises a water purification pipe fitting, a filter element assembly and a sterilization part, and the water purification pipe fitting is provided with a first water inlet and a first water outlet; the filter element assembly and the sterilization part are both arranged on the water purification pipe fitting and located between the first water inlet and the first water outlet, and the sterilization part is arranged on the side, close to the first water outlet, of the filter element assembly; the backflow pipe set is provided with a backflow inlet and a backflow outlet, and the backflow outlet is used for being communicated with the first water inlet; the water outlet piece is provided with a second water inlet and a second water outlet; and the first water outlet is selectively communicated with the backflow inlet or the second water inlet. Through the technical scheme provided by the invention, the technical problem that a water purification system in the prior art is easy to breed bacteria can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification systems, and in particular to a water purification system and a water purification method. Background Art

[0002] At present, due to the increasingly serious water quality problems and the gradual improvement of people's living standards, water purifiers have gradually become one of the important household appliances in life. In the existing water purifiers, the water quality and sterilization effect are the key concerns of users.

[0003] However, in common existing water purifiers, when the whole machine is shut down and the water tap is closed for a period of time, the water quality in the water purification pipeline will deteriorate due to the forward osmosis of the reverse osmosis membrane, resulting in the problem of poor water quality in the first cup of water when the user uses it next time. At the same time, in common existing water purifiers, when the whole machine is shut down and the water tap is closed for a period of time, bacteria may also grow in the whole machine pipeline, resulting in the hidden danger of excessive bacteria in the water from the tap when the user uses it later. Summary of the invention

[0004] The main purpose of the present invention is to provide a water purification system and a water purification method to solve the technical problem that the water purification system in the prior art is prone to breeding bacteria.

[0005] In order to achieve the above object, according to one aspect of the present invention, a water purification system is provided, comprising:

[0006] A water purification pipe assembly, the water purification pipe assembly comprising a water purification pipe fitting, a filter element assembly and a sterilizing element, the water purification pipe fitting having a first water inlet and a first water outlet, the filter element assembly and the sterilizing element are both arranged on the water purification pipe fitting and located between the first water inlet and the first water outlet, and the sterilizing element is arranged on a side of the filter element assembly close to the first water outlet;

[0007] A reflux pipe group, wherein the reflux pipe group has a reflux inlet and a reflux outlet, and the reflux outlet is used to communicate with the first water inlet;

[0008] A water outlet, wherein the water outlet has a second water inlet and a second water outlet;

[0009] Wherein, the first water outlet can be selectively connected to the reflux inlet or the second water inlet.

[0010] Furthermore, the water purification pipe group further comprises a water quality detection structure and a control component, wherein the water quality detection structure is arranged between the sterilization component and the filter element assembly, and both the water quality detection structure and the sterilization component are connected to the control component, and the control component controls the operation of the sterilization component according to the detection condition of the water quality detection structure and / or the use condition of the filter element assembly;

[0011] Wherein, the water quality detection structure includes a total dissolved solids tester and / or a bacteria detector in water.

[0012] Furthermore, the filter element assembly includes a plurality of filter elements connected in sequence, and the filter outlet of one of two adjacent filter elements is connected to the filter inlet of the other of the two adjacent filter elements.

[0013] Furthermore, the filter element assembly comprises:

[0014] A first filter element and a second filter element, the first filter element comprises an outer shell and at least two filter elements arranged in the outer shell, the filter inlet of one of the at least two filter elements is communicated with the first water inlet, the filter outlet of one of the at least two filter elements is connected to the filter inlet of the second filter element, the filter outlet of the second filter element is connected to the filter inlet of another of the at least two filter elements, and the filter outlet of another of the at least two filter elements is connected to the sterilization element.

[0015] Further, one of the at least two filter elements is a polypropylene melt-blown filter element; and / or,

[0016] Another one of the at least two filter elements is a polyamide composite active carbon filter element; and / or,

[0017] The second filter element is a reverse osmosis filter element.

[0018] Furthermore, the second filter element is a reverse osmosis filter element;

[0019] The water purification pipe comprises a first connecting pipe, a second connecting pipe, a first water quality detection member and a second water quality detection member, the two ends of the first connecting pipe are respectively connected to the filter outlet of one of the at least two filter elements and the filter inlet of the second filter element, and the two ends of the second connecting pipe are respectively connected to the filter outlet of the second filter element and the filter inlet of another of the at least two filter elements;

[0020] Wherein, the first water quality detection component is arranged on the first connecting pipeline, and the second water quality detection component is arranged on the second connecting pipeline.

[0021] Furthermore, the water purification pipe group also includes:

[0022] A first flow valve is arranged on the first connecting pipeline; and / or,

[0023] A flow meter is arranged on the first connecting pipeline; and / or,

[0024] a pressure-stabilizing pump, arranged on the first connecting pipeline; and / or,

[0025] A wastewater pipeline, the inlet of which is connected to the wastewater outlet of the second filter element.

[0026] Furthermore, the reflux pipe group includes a reflux pipe member, and the reflux pipe member has the reflux inlet and the reflux outlet; the reflux pipe member also includes:

[0027] A second flow valve is arranged on the reflux pipe; and / or,

[0028] The first check valve is arranged on the reflux pipe.

[0029] Further, the water outlet is an electrically controlled faucet; or,

[0030] The water outlet is a mechanical faucet, and the water purification pipe further comprises a pressure switch and a second check valve, wherein the pressure switch and the second check valve are both arranged between the sterilization component and the mechanical faucet.

[0031] Further, the water purification pipe also includes a water storage member, which is arranged between the filter element assembly and the sterilization element, the water storage inlet of the water storage member is connected to the filter element assembly, and the water storage outlet of the water storage member is connected to the sterilization element; and / or,

[0032] The sterilizing element is a flow-through ultraviolet sterilizer; and / or,

[0033] The water purification system further comprises a control component and a storage component. The storage component is used to record and store the user's water outlet operation time and / or flow rate of the water outlet component. The storage component is connected to the control component by signal.

[0034] According to another aspect of the present invention, a water purification method is provided, wherein the water purification method adopts the water purification system provided above, and the water purification method comprises:

[0035] Obtaining the user's water use habits and / or the life attenuation of the filter element component of the water purification system;

[0036] According to the user's water use habits and / or the life attenuation of the filter element assembly of the water purification system, controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system;

[0037] The user's water usage habits include the user's common water usage time period.

[0038] Further, controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system according to the water use habits of the user and / or the life attenuation of the filter element assembly of the water purification system includes:

[0039] When it is the peak time period of water consumption by users, controlling the first water outlet to be disconnected from the reflux inlet;

[0040] When it is in the off-peak time period of users' water consumption, the first water outlet is intermittently controlled to be disconnected and connected with the return inlet;

[0041] Among them, the water flow rate during the peak water use time period of the user is greater than the water flow rate during the off-peak water use time period of the user; and / or the water use frequency during the peak water use time period of the user is greater than the water use frequency during the off-peak water use time period of the user.

[0042] Further, controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system according to the water use habits of the user and / or the life attenuation of the filter element assembly of the water purification system includes:

[0043] When the user is in a preset time period before the peak time period of water consumption, the first water outlet is controlled to be disconnected from the reflux inlet.

[0044] Further, controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system according to the water use habits of the user and / or the life attenuation of the filter element assembly of the water purification system includes:

[0045] When the service life percentage of the filter element assembly is less than or equal to the preset service life percentage, the time from the first water outlet being connected to the reflux inlet until the first water outlet being disconnected from the reflux inlet is controlled to be a first preset time length;

[0046] When the service life percentage of the filter element assembly is greater than the preset service life percentage, the time from the first water outlet being connected to the reflux inlet until the first water outlet being disconnected from the reflux inlet is controlled to be a second preset time length;

[0047] Among them, the first preset time length is shorter than the second preset time length.

[0048] Furthermore, the water purification method further comprises:

[0049] Obtaining the water quality of the pipeline between the filter element assembly of the water purification system and the sterilization element of the water purification system;

[0050] The sterilization degree of the sterilization component of the water purification system is controlled according to the water quality of the pipeline between the filter element component of the water purification system and the sterilization component of the water purification system.

[0051] By applying the technical solution of the present invention, a sterilizing component is provided in front of the water outlet component of the whole water purification pipe group, so as to achieve the sterilization effect on the water path of the water purification pipe group and ensure the sterility of the water from the faucet. At the same time, a reflux pipe group is added after the sterilizing component and connected to the inlet of the filter element assembly. When the whole water purification system is in the water production stop mode, the whole machine control system can control the purified water to flow back to the inlet of the filter element assembly, and circulate and dilute the filter element assembly, so as to improve the water quality of the first cup of water and achieve the antibacterial effect of the pipeline at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0053] Figure 1 A schematic structural diagram of a water purification system with an electronically controlled faucet according to an embodiment of the present invention is shown;

[0054] Figure 2 A schematic structural diagram of a water purification system with a mechanical faucet provided according to an embodiment of the present invention is shown;

[0055] Figure 3 A schematic structural diagram of a water purification system with a water storage element provided according to an embodiment of the present invention is shown.

[0056] The above drawings include the following reference numerals:

[0057] 10. Water purification pipe group;

[0058] 11. Water purification pipe; 111. First connecting pipeline; 112. Second connecting pipeline; 113. First water quality detection component; 114. Second water quality detection component;

[0059] 12. filter element assembly; 121. first filter element; 122. second filter element;

[0060] 13. Sterilization element; 14. First flow valve; 15. Flow meter; 16. Pressure regulating pump; 17. Wastewater pipeline; 18. Third flow valve; 19. Pressure switch; 110. Second check valve;

[0061] 20. Reflux pipe group; 21. Reflux pipe fittings; 22. Second flow valve; 23. First check valve;

[0062] 30. Water outlet parts;

[0063] 41. Total dissolved solids tester in water; 42. Bacteria detector;

[0064] 50. Water storage parts. DETAILED DESCRIPTION

[0065] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0066] like Figures 1 to 3 As shown, an embodiment of the present invention provides a water purification system, which includes: a water purification pipe group 10, the water purification pipe group 10 includes a water purification pipe 11, a filter element assembly 12 and a sterilization element 13, the water purification pipe 11 has a first water inlet and a first water outlet, the filter element assembly 12 and the sterilization element 13 are both arranged on the water purification pipe 11 and located between the first water inlet and the first water outlet, and the sterilization element 13 is arranged on a side of the filter element assembly 12 close to the first water outlet; a reflux pipe group 20, the reflux pipe group 20 has a reflux inlet and a reflux outlet, and the reflux outlet is used to communicate with the first water inlet; a water outlet 30, the water outlet 30 has a second water inlet and a second water outlet. Among them, the first water outlet can be selectively communicated with the reflux inlet or the second water inlet.

[0067] By adopting the water purification system provided by the embodiment of the present invention, by setting a sterilization part 13 in front of the water outlet part 30 of the whole water purification pipe group 10, the sterilization effect on the water channel of the water purification pipe group 10 can be achieved, and the water outlet of the water outlet part 30 is guaranteed to be sterile. At the same time, a return pipe group 20 is added after the sterilization part 13, and connected to the filter element assembly 12. In this way, when the whole water purification system is in the water production stop mode, the whole machine control system can control the clean water to flow back to the filter element assembly 12 to circulate and dilute the filter element assembly 12, thereby improving the water quality of the first cup of water while achieving the antibacterial effect of the overall pipeline of the water purification system. Therefore, the water purification system provided by the embodiment of the present invention can solve the technical problem that the water purification system in the prior art is easy to breed bacteria.

[0068] In this embodiment, the filter element assembly 12 includes a plurality of filter elements connected in sequence, and the filter outlet of one of two adjacent filter elements is connected to the filter inlet of the other of the two adjacent filter elements. In this way, the filtering effect of the filter element assembly 12 can be improved.

[0069] Specifically, the filter element assembly 12 includes a first filter element 121 and a second filter element 122. The first filter element 121 includes a housing and at least two filter elements disposed in the housing. The filter inlet of at least one of the two filter elements is communicated with the first water inlet. The filter outlet of at least one of the two filter elements is connected to the filter inlet of the second filter element 122. The filter outlet of the second filter element 122 is connected to the filter inlet of the other of the at least two filter elements. The filter outlet of the other of the at least two filter elements is connected to the sterilization element 13. With such a structural arrangement, multiple filtrations can be performed easily and the filtration effect can be improved.

[0070] Specifically, at least one of the two filter elements is a polypropylene melt-blown filter element to ensure the filtering effect.

[0071] Specifically, the other one of the at least two filter elements is a polyamide composite active carbon filter element to ensure the filtering effect.

[0072] Specifically, the second filter element 122 is a reverse osmosis filter element so as to better improve the filtering effect.

[0073] In this embodiment, the second filter element 122 is a reverse osmosis filter element; the water purification pipe 11 includes a first connecting pipe 111, a second connecting pipe 112, a first water quality detection element 113 and a second water quality detection element 114, the two ends of the first connecting pipe 111 are respectively connected to the filter outlet of at least one of the two filter elements and the filter inlet of the second filter element 122, and the two ends of the second connecting pipe 112 are respectively connected to the filter outlet of the second filter element 122 and the filter inlet of at least another of the two filter elements; wherein the first water quality detection element 113 is arranged on the first connecting pipe 111, and the second water quality detection element 114 is arranged on the second connecting pipe 112. With such a structural arrangement, it is easy to know the filtering use of the second filter element 122 and the changes in water quality before and after filtering.

[0074] Specifically, the first water quality detection component 113 and / or the second water quality detection component 114 may be a TDS probe (ie, a total dissolved solids probe).

[0075] Specifically, the water purification pipe group 10 further includes a first flow valve 14 , which is disposed on the first connecting pipeline 111 so as to control and adjust the flow of the first connecting pipeline 111 .

[0076] The water purification pipe assembly 10 further includes a flow meter 15 , which is disposed on the first connecting pipe 111 so as to obtain the flow rate of the first connecting pipe 111 .

[0077] The water purification pipe assembly 10 further includes a pressure-stabilizing pump 16 , which is disposed on the first connecting pipeline 111 to improve the pressure stability of the first connecting pipeline 111 .

[0078] The water purification pipe assembly 10 further includes a wastewater pipe 17, the inlet of the wastewater pipe 17 is connected to the wastewater outlet of the second filter element 122, so as to discharge the wastewater in time.

[0079] In this embodiment, the reflux pipe assembly 20 includes a reflux pipe member 21, which has a reflux inlet and a reflux outlet. The reflux pipe member 21 also includes a second flow valve 22, which is arranged on the reflux pipe member 21 to control the flow of the reflux pipe member 21, and the flow of the reflux pipe member 21 can be adjusted to zero.

[0080] Specifically, the first flow valve 14 and the second flow valve 22 in this embodiment can both be solenoid valves. Specifically, a third flow valve 18 is also provided on the wastewater pipeline 17, and the third flow valve 18 can be a solenoid valve.

[0081] The return pipe member 21 further includes a first check valve 23 , which is disposed on the return pipe member 21 to make the flow path of the return pipe member 21 a one-way flow.

[0082] Specifically, the water outlet 30 is an electrically controlled faucet, so as to facilitate water outlet control and realize electrically controlled water outlet.

[0083] Specifically, the water outlet part 30 is a mechanical faucet, and the water purification pipe part 11 also includes a pressure switch 19 and a second check valve 110. The pressure switch 19 and the second check valve 110 are both arranged between the sterilization part 13 and the mechanical faucet to facilitate water outlet through the cooperation of the pressure switch 19 and the second check valve 110.

[0084] In this embodiment, the water purification pipe 11 further includes a water storage member 50, which is disposed between the filter element assembly 12 and the sterilization member 13. The water storage inlet of the water storage member 50 is connected to the filter element assembly 12, and the water storage outlet of the water storage member 50 is connected to the sterilization member 13. In this way, it is ensured that the water outlet 30 has a sufficient water flow rate when discharging water. In addition, the water in the water storage member 50 can be sterilized and disinfected through the reflux process.

[0085] Specifically, the sterilizing element 13 is a flow-through ultraviolet sterilizer, which has a good sterilization and disinfection effect.

[0086] In this embodiment, the water purification system further includes a control unit and a storage unit, the storage unit is used to record and store the user's water outlet operation time and / or flow rate of the water outlet unit 30, and the storage unit is connected to the control unit by signal. In this way, it is easy to obtain the user's water use habits and facilitate the subsequent control of the return water operation.

[0087] Specifically, the water purification pipe group 10 in this embodiment also includes a water quality detection structure and a control component. The water quality detection structure is arranged between the sterilization component 13 and the filter element assembly 12. The water quality detection structure and the sterilization component 13 are both connected to the control component. The control component controls the operation of the sterilization component 13 according to the detection condition of the water quality detection structure and / or the use condition of the filter element assembly 12. Among them, the water quality detection structure includes a total dissolved solids tester 41 and / or a bacteria detector 42.

[0088] Specifically, when the water quality detected by the water quality detection structure is poor (including any of the following situations: the detection value of the fixed solubility tester in water is greater than or equal to the preset value and the bacteria value of the water in the pipeline between the filter element assembly 12 and the sterilization element 13 is greater than or equal to the preset value), the control element controls the sterilization element 13 to increase the sterilization power to improve the sterilization effect. Specifically, the sterilization element 13 is an ultraviolet sterilizer. When the filter element assembly 12 is poorly dirty during use, the control element controls the sterilization element 13 to increase the sterilization power to improve the sterilization effect. Specifically, the sterilization element 13 is an ultraviolet sterilizer.

[0089] When the filter element assembly 12 is dirty, the TDS of the pure water outlet will decrease, and the water outlet flow rate will also decrease. Therefore, the degree of dirtiness of the filter element can be detected and calculated by two methods: the change in pure water TDS and the change in the numerical attenuation detected by the flowmeter 15. The change in the life of the filter element is also indirectly calculated through the accumulation of the system flow, which is actually equivalent to the same parameter as the flow change. In this embodiment, the degree of dirtiness of the filter element assembly 12 can be described according to the attenuation of the filter element life. That is, the change in the system flow attenuation and the degree of dirtiness of the filter element (filter element life) are the same parameter.

[0090] The first filter element can be a coarse filter element such as PAC, PP cotton, etc. The second filter element can be a filter element such as ultrafiltration + C composite, post-C, etc. The first filter element can be integrated with the second filter element to form a composite filter element, or the first filter element can be a composite filter element alone.

[0091] Another embodiment of the present invention provides a water purification method, which adopts the water purification system provided above, and the water purification method includes: obtaining the user's water use habits and / or the life decay of the filter element assembly 12 of the water purification system; according to the user's water use habits and / or the life decay of the filter element assembly 12 of the water purification system, controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system; wherein the user's water use habits include the user's commonly used water time period. With such a method, by controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system, it is possible to facilitate the return water sterilization of the water purification system through the reflux pipe group 20 and the water purification pipe group 10 when the water outlet 30 is not discharging water, thereby improving the sterilization and disinfection effect of the water purification system.

[0092] In this embodiment, according to the user's water use habits and / or the life attenuation of the filter element assembly 12 of the water purification system, the first water outlet of the water purification system is controlled to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system, including: when the user is in the peak water use time period, the first water outlet is controlled to be disconnected from the reflux inlet; when the user is in the low-peak water use time period, the first water outlet is intermittently controlled to be disconnected and connected with the reflux inlet; wherein the water flow rate in the peak water use time period of the user is greater than the water flow rate in the low-peak water use time period of the user; and / or the water use frequency in the peak water use time period of the user is greater than the water use frequency in the low-peak water use time period of the user. In this way, the impact of the return water sterilization process on the user's normal water intake can be facilitated to ensure the normal use of the user.

[0093] Specifically, according to the user's water use habits and / or the life attenuation of the filter element assembly 12 of the water purification system, the first water outlet of the water purification system is controlled to be connected with the return inlet of the water purification system or the second water inlet of the water purification system, including: when it is in a preset time period before the peak time period of the user's water use, the first water outlet is controlled to be disconnected from the return inlet. In this way, it is convenient to ensure the water quality effect when the user takes the first cup of water.

[0094] In this embodiment, according to the user's water use habits and / or the life attenuation of the filter element assembly 12 of the water purification system, the first water outlet of the water purification system is controlled to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system, including: when the service life percentage of the filter element assembly 12 is less than or equal to the preset service life percentage, the time from the first water outlet to the reflux inlet is controlled to be the first preset time length; when the service life percentage of the filter element assembly 12 is greater than the preset service life percentage, the time from the first water outlet to the reflux inlet is controlled to be the second preset time length; wherein the first preset time length is less than the second preset time length. Using such a method, it is convenient to better adapt to the degree of dirtiness of the filter element assembly 12, so as to better sterilize the filter element assembly 12, thereby ensuring the water quality of the water outlet 30.

[0095] Specifically, the service life corresponds to a time unit. Specifically, the service life can be measured in hours, days or minutes.

[0096] In this embodiment, the water purification method also includes: obtaining the water quality of the pipeline between the filter element assembly 12 of the water purification system and the sterilization element 13 of the water purification system; and controlling the sterilization degree of the sterilization element 13 of the water purification system according to the water quality of the pipeline between the filter element assembly 12 of the water purification system and the sterilization element 13 of the water purification system. By adopting such a method, it is possible to better adaptively sterilize and disinfect the water purification system according to the actual situation, so as to achieve a better sterilization effect. Specifically, the sterilization degree of the sterilization element 13 can be controlled by controlling the operating power of the sterilization element 13. The water quality can be measured by detecting the TDS value.

[0097] The working frequency and working time of the purified water return can be intelligently adjusted according to the user's usage habits and the degree of dirtiness of the filter element. For example, the purified water return should try to avoid the peak period of water fetching by users, and it is more appropriate to set the working time period at night so as not to affect the user's water fetching and use; if the purified water is refluxed during the day, the working time should not be too long; if the purified water is refluxed at night, the working time can be appropriately extended. And the working frequency and working time of the purified water return can be adjusted according to the usage and degree of dirtiness of the filter element assembly 12; for example, when the filter element is new, the working frequency of the purified water return can be lower and the working time can be shorter; if the filter element is severely dirty after being used for a period of time, the working frequency of the purified water return can be increased and the working time can be extended.

[0098] The electronic control panel and the whole machine control system can collect users' water-taking habits, such as water-taking frequency and time periods, and intelligently set the working time period and working frequency of pure water return according to users' water-taking habits. While avoiding interference with users' water taking, it can ensure that the water quality of users' drinking is always fresh and pollution-free.

[0099] Specifically: the working frequency can be set to 1 to 2 hours during the day, while avoiding the peak water collection periods of 8:00-9:30, 12:00-13:30, and 18:00-19:30, and the preset working time is set to 1 to 5 minutes. The working frequency can be set to 2 to 3 hours at night, and the preset working time is set to 5 to 10 minutes.

[0100] Specifically, according to the percentage of service life of the filter element or the attenuation percentage of the water flow rate of the filter element, the degree of dirtiness of the filter element can be quantitatively evaluated, and different working hours can be set accordingly. The percentage of service life of the filter element is calculated according to the amount of water used by the filter element and the preset total water flow rate of the filter element, and different working hours are set according to the percentage of service life of the filter element: when the percentage of service life of the filter element assembly 12 is in the range of 0% to 30%, the preset working time of each pure water reflux can be set to 1 to 3 minutes; when the percentage of service life of the filter element assembly 12 is in the range of 30% to 70%, the preset working time of each pure water reflux can be set to 3 to 6 minutes; when the percentage of service life of the filter element assembly 12 is above 70%, the preset working time of each pure water reflux can be set to 6 to 12 minutes. Similarly, the attenuation percentage of the water flow rate of the filter element can be calculated according to the initial water flow rate of the filter element, the preset minimum water flow rate of the filter element, and the real-time water flow rate of the filter element, and different working hours can be set according to the attenuation percentage of the water flow rate of the filter element (the setting method is the same as above).

[0101] Specifically, when the user is sleeping at night, the probability of the user taking water is usually low. During the day, the probability of the user using water is relatively high. The working frequency can be set to 1 to 2 hours during the day, and the preset duration can be set to 1 to 5 minutes. Furthermore, the pure water reflux process is controlled to start 1 minute to 60 minutes before the user takes water. For example, if the user takes water at 1 pm, the drainage process is controlled to start before that, ensuring that the drainage process is completed when the user takes water, and the water quality is fresh and pollution-free.

[0102] When the electric control board and the whole machine control system intermittently send opening and closing signals to the return solenoid valve, the interval between this return and the next return is not fixed. For example, the interval can be gradually increased. In a specific application example, users take water more frequently during the day, and the interval can be gradually increased to avoid the circulation mode affecting the user's normal water intake.

[0103] In summary, periodic or intermittent control of the reflux solenoid valve for drainage is more in line with the actual needs of users and the working state of the water purification system, which is beneficial to energy saving and avoids useless work. Moreover, the user participates in setting the parameters (cycle and first preset duration) instead of fixing the parameters, which is more intelligent and further improves the user experience.

[0104] In one possible implementation, the electronic control board (corresponding control component) and the whole machine control system are also used to obtain the user's water usage time information, and determine the operating frequency and working duration of the return solenoid valve based on the water usage time information, so that the return solenoid valve can complete its work before the user takes water.

[0105] In order to obtain the user's water use time information, a collection chip can be set in the electronic control board to automatically collect the user's water use frequency and time period, and send this information to the electronic control board and the whole machine control system. This allows the above-mentioned pure water discharge process to avoid the user's water use time period and the water production time period of the water purification system, so as to avoid water channel interference caused by multiple modes being executed simultaneously in the water purification system. And the operating frequency and working time of the reflux solenoid valve are automatically set according to the user's water use habits, which can ensure that the water quality of the user's drinking water is always fresh and pollution-free.

[0106] In a possible implementation, the electric control board and the whole machine control system are also used to send a closing signal to the reflux solenoid valve when it is detected that the user is taking water.

[0107] Specifically, the user's water extraction needs can be monitored by collecting user operation signals, and the user's water extraction signals can be fed back to the electric control board and the whole machine control system. After receiving the user's water extraction signal, the electric control board and the whole machine control system can send a closing signal to the reflux solenoid valve to stop the reflux. As a result, the user can immediately extract water normally without interfering with the user's water extraction. And as described in the above implementation, according to the user's water use habits, the drainage process can be avoided during the user's water extraction period, while ensuring that the user's drinking water is safe and pollution-free, while avoiding interference with the user's water extraction.

[0108] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by setting a sterilization component in front of the water outlet of the water purification branch of the whole machine, the sterilization effect of the water channel of the water purification branch can be achieved, ensuring that the water from the faucet is sterile. At the same time, a pure water return water channel is added after the sterilization component and connected to the front of the pre-filter element. When the whole machine is in the water production stop mode, the whole machine control system can control the purified water to return to the front of the pre-filter element to circulate and dilute the filter assembly, thereby improving the water quality of the first cup of water while achieving the antibacterial effect of the pipeline.

[0109] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0110] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0111] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0112] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0113] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water purification system, characterized in that: include: A water purification pipe assembly (10), the water purification pipe assembly (10) comprising a water purification pipe member (11), a filter element assembly (12) and a sterilizing element (13), the water purification pipe member (11) having a first water inlet and a first water outlet, the filter element assembly (12) and the sterilizing element (13) being both arranged on the water purification pipe member (11) and located between the first water inlet and the first water outlet, and the sterilizing element (13) being arranged on a side of the filter element assembly (12) close to the first water outlet; A reflux pipe group (20), the reflux pipe group (20) having a reflux inlet and a reflux outlet, the reflux outlet being used to communicate with the first water inlet; A water outlet (30), wherein the water outlet (30) has a second water inlet and a second water outlet; Wherein, the first water outlet can be selectively connected to the reflux inlet or the second water inlet.

2. The water purification system according to claim 1, characterized in that: The water purification pipe assembly (10) further comprises a water quality detection structure and a control component, wherein the water quality detection structure is arranged between the sterilizing component (13) and the filter element assembly (12), and the water quality detection structure and the sterilizing component (13) are both connected to the control component, and the control component controls the operation of the sterilizing component (13) according to the detection condition of the water quality detection structure and / or the use condition of the filter element assembly; Wherein, the water quality detection structure comprises a total dissolved solids tester (41) and / or a bacteria detector (42) in water.

3. The water purification system according to claim 1, characterized in that: The filter element assembly (12) comprises a plurality of filter elements connected in sequence, wherein the filter outlet of one of two adjacent filter elements is connected to the filter inlet of the other of the two adjacent filter elements.

4. The water purification system according to claim 1, characterized in that: The filter element assembly (12) comprises: A first filter element (121) and a second filter element (122), wherein the first filter element (121) comprises an outer shell and at least two filter elements arranged in the outer shell, the filter inlet of one of the at least two filter elements is connected to the first water inlet, the filter outlet of one of the at least two filter elements is connected to the filter inlet of the second filter element (122), the filter outlet of the second filter element (122) is connected to the filter inlet of another one of the at least two filter elements, and the filter outlet of another one of the at least two filter elements is connected to the sterilization element (13).

5. The water purification system according to claim 4, characterized in that: One of the at least two filter elements is a polypropylene melt-blown filter element; and / or, Another one of the at least two filter elements is a polyamide composite active carbon filter element; and / or, The second filter element (122) is a reverse osmosis filter element.

6. The water purification system according to claim 4, characterized in that: The second filter element (122) is a reverse osmosis filter element; The water purification pipe (11) comprises a first connecting pipe (111), a second connecting pipe (112), a first water quality detection component (113) and a second water quality detection component (114); the two ends of the first connecting pipe (111) are respectively connected to the filter outlet of one of the at least two filter elements and the filter inlet of the second filter element (122); the two ends of the second connecting pipe (112) are respectively connected to the filter outlet of the second filter element (122) and the filter inlet of another of the at least two filter elements; Wherein, the first water quality detection component (113) is arranged on the first connecting pipeline (111), and the second water quality detection component (114) is arranged on the second connecting pipeline (112).

7. The water purification system according to claim 6, characterized in that: The water purification pipe assembly (10) further comprises: a first flow valve (14), arranged on the first connecting pipeline (111); and / or, a flow meter (15), arranged on the first connecting pipeline (111); and / or, a pressure-stabilizing pump (16), arranged on the first connecting pipeline (111); and / or, A wastewater pipeline (17), wherein the inlet of the wastewater pipeline (17) is connected to the wastewater outlet of the second filter element (122).

8. The water purification system according to claim 1, characterized in that: The reflux pipe group (20) comprises a reflux pipe member (21), wherein the reflux pipe member (21) has the reflux inlet and the reflux outlet; The return pipe (21) further comprises: A second flow valve (22) is arranged on the return pipe (21); and / or, The first check valve (23) is arranged on the return pipe (21).

9. The water purification system according to claim 1, characterized in that: The water outlet (30) is an electrically controlled faucet; or, The water outlet component (30) is a mechanical faucet, and the water purification pipe component (11) further comprises a pressure switch (19) and a second check valve (110), wherein the pressure switch (19) and the second check valve (110) are both arranged between the sterilization component (13) and the mechanical faucet.

10. The water purification system according to claim 1, characterized in that: The water purification pipe (11) further comprises a water storage member (50) arranged between the filter element assembly (12) and the sterilization member (13), wherein a water storage inlet of the water storage member (50) is connected to the filter element assembly (12), and a water storage outlet of the water storage member (50) is connected to the sterilization member (13); and / or, The sterilizing element (13) is a flow-through ultraviolet sterilizer; and / or, The water purification system further comprises a control component and a storage component, wherein the storage component is used to record and store the user's water outlet operation time and / or flow rate of the water outlet component (30), and the storage component is connected to the control component by signal.

11. A water purification method, characterized in that: The water purification method adopts the water purification system according to any one of claims 1 to 10, and the water purification method comprises: Obtaining the user's water use habits and / or the life attenuation of the filter element component of the water purification system; According to the user's water use habits and / or the life attenuation of the filter element assembly of the water purification system, controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system; The user's water usage habits include the user's common water usage time period.

12. The water purification method according to claim 11, characterized in that: The method of controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system according to the water use habits of the user and / or the life attenuation of the filter element assembly of the water purification system comprises: When it is the peak time period of water consumption by users, controlling the first water outlet to be disconnected from the reflux inlet; When it is in the off-peak time period of users' water consumption, the first water outlet is intermittently controlled to be disconnected and connected with the return inlet; Among them, the water flow rate during the peak water use time period of the user is greater than the water flow rate during the off-peak water use time period of the user; and / or the water use frequency during the peak water use time period of the user is greater than the water use frequency during the off-peak water use time period of the user.

13. The water purification method according to claim 11, characterized in that: The method of controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system according to the water use habits of the user and / or the life attenuation of the filter element assembly of the water purification system comprises: When the user is in a preset time period before the peak time period of water consumption, the first water outlet is controlled to be disconnected from the reflux inlet.

14. The water purification method according to claim 11, characterized in that: The method of controlling the first water outlet of the water purification system to be connected with the reflux inlet of the water purification system or the second water inlet of the water purification system according to the water use habits of the user and / or the life attenuation of the filter element assembly of the water purification system comprises: When the service life percentage of the filter element assembly is less than or equal to the preset service life percentage, the time from the first water outlet being connected to the reflux inlet until the first water outlet being disconnected from the reflux inlet is controlled to be a first preset time length; When the service life percentage of the filter element assembly is greater than the preset service life percentage, the time from the first water outlet being connected to the reflux inlet until the first water outlet being disconnected from the reflux inlet is controlled to be a second preset time length; Among them, the first preset time length is shorter than the second preset time length.

15. The water purification method according to claim 11, characterized in that: The water purification method further comprises: Obtaining the water quality of the pipeline between the filter element assembly of the water purification system and the sterilization element of the water purification system; The sterilization degree of the sterilization component of the water purification system is controlled according to the water quality of the pipeline between the filter element component of the water purification system and the sterilization component of the water purification system.

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