Self-cleaning water purification system and water purifier

Abstract

The utility model discloses a self-cleaning water purification system and water purifier wherein the self-cleaning water purification system comprises: a filtration module, the filtration module comprises a first filter element and a second filter element, the first filter element and the second filter element are both used for filtering a water source to be filtered, and the second filter element is also used for storing a variety of cleaning agents; the gas-liquid treatment module is used for carrying out gas-liquid mixing treatment on the cleaning agent, the to-be-filtered water source and the to-be-mixed gas so as to generate different types of microbubble cleaning water; the switch module comprises a plurality of switches, and the plurality of switches are used for guiding the generation and circulation directions of the microbubble cleaning water; the control module is used for controlling the switch module, so that the microbubble cleaning water flows to the first filter element to perform multi-stage cleaning on the first filter element. According to the self-cleaning water purification system, the outlet water quality and flow of the self-cleaning water purification system can be improved, the service life of the filter element is prolonged, the replacement cost of the filter element is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a self-cleaning water purification system and a water purifier. Background Art

[0002] As people continue to pursue a higher quality of life, water purifiers have become an indispensable device in family life. Reverse osmosis water purifiers dominate the water purification market with their efficient filtering performance. The core filtering unit is the reverse osmosis filter element, which can effectively remove various pollutants in the water and ensure the safety of water quality. However, as the use time increases, a large amount of sediment will accumulate at the concentrated water end of the reverse osmosis membrane, affecting the water purification effect. When solving this problem, traditional household water purifiers usually adopt the method of directly replacing the filter element, which not only increases the cost of use, but also causes a waste of resources. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the first purpose of the utility model is to provide a self-cleaning water purification system, which can improve the water quality and flow rate of the self-cleaning water purification system by cleaning the first filter element, thereby increasing the service life of the filter element and reducing the replacement cost of the filter element, thereby improving the user experience.

[0004] The second purpose of the utility model is to provide a water purifier.

[0005] In order to achieve the above-mentioned purpose, the first aspect of the utility model proposes a self-cleaning water purification system, wherein the system includes: a filtration module, the filtration module includes a first filter element and a second filter element, the first filter element and the second filter element are both used to filter the water source to be filtered, and the second filter element is also used to store a variety of cleaning agents; a gas-liquid processing module, the gas-liquid processing module is used to perform gas-liquid mixing treatment on the cleaning agent, the water source to be filtered and the gas to be mixed to generate different types of microbubble cleaning water; a switch module, the switch module includes a plurality of switches, and the plurality of switches are used to guide the generation and flow direction of the microbubble cleaning water; a control module, the control module is used to control the switch module so that the microbubble cleaning water flows to the first filter element to perform multi-stage cleaning on the first filter element.

[0006] According to the self-cleaning water purification system proposed in the example of the utility model, by cleaning the first filter element, the water quality and flow rate of the self-cleaning water purification system can be improved, thereby increasing the service life of the filter element and reducing the replacement cost of the filter element, thereby improving the user experience.

[0007] In addition, the self-cleaning water purification system according to the utility model may also include the following additional technical features:

[0008] In some examples, the second filter element includes a pre-filter element and a post-filter element, the pre-filter element and the post-filter element each include a water inlet and a water outlet, and the water inlet of the pre-filter element is connected to the water outlet of the water source to be filtered, the pre-filter element can be used to store a primary cleaning agent, and the post-filter element can be used to store a secondary cleaning agent.

[0009] In some examples, the gas-liquid processing module includes an ejector, a gas-liquid mixer and a first bubbler, the water inlet end of the ejector is connected to the water outlet of the pre-filter element, the air inlet end of the ejector is connected to the air inlet of the gas to be mixed, the output end of the ejector is connected to the input end of the gas-liquid mixer, the output end of the gas-liquid mixer is connected to the input end of the first bubbler, and the output end of the first bubbler is connected to the water inlet of the first filter element.

[0010] In some examples, the first filter element includes a filtered water outlet and a wastewater outlet, the switch module includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch, the first switch is arranged between the water outlet of the water source to be filtered and the water inlet of the pre-filter element, the second switch is arranged between the gas outlet of the gas to be mixed and the gas inlet end of the ejector, the third switch is arranged between the water inlet end of the ejector and the water outlet of the pre-filter element, the fourth switch is arranged between the output end of the gas-liquid mixer and the input end of the first bubbler, the fifth switch is arranged at the wastewater outlet of the first filter element, and the sixth switch is arranged between the water outlet of the post-filter element and the fourth switch.

[0011] In some examples, the control module is specifically used to: control the first switch, the second switch, the third switch, the fourth switch and the fifth switch to be turned on, and the sixth switch to be turned off, so as to guide the water source to be filtered through the pre-filter element, and then use the ejector and the gas-liquid mixer to mix the filtered water source to be filtered and the gas to be mixed to form a primary gas-liquid mixture, and then guide the primary gas-liquid mixture to the first bubbler to generate primary microbubble cleaning water and then flow to the first filter element to perform primary cleaning on the first filter element.

[0012] In some examples, when the primary cleaning is completed, the control module is also used to: control the sixth switch to turn on, so as to guide the filtered water flowing out from the filtered water outlet of the first filter element to pass through the post-filter element and then merge with the water outlet of the pre-filter element, and then mix with the gas to be mixed through the ejector and the gas-liquid mixer to form a secondary gas-liquid mixture, and guide the secondary gas-liquid mixture to the first bubbler to generate secondary microbubble cleaning water and then flow to the first filter element, so as to perform secondary cleaning on the first filter element.

[0013] In some examples, the control module is also used to: when controlling the sixth switch to be turned on, control the fifth switch to be turned off, and when the closing time of the fifth switch is greater than or equal to the first preset time, control the fifth switch to be continuously turned on for a second preset time to complete the secondary cleaning of the first filter element.

[0014] In some examples, at the end of the secondary cleaning stage, the consumption of the plurality of cleaning agents in the second filter element is completed.

[0015] In some examples, the system also includes a drinking water outlet and a pipeline machine interface, the switch module also includes a seventh switch, an eighth switch and a ninth switch, the seventh switch and the eighth switch are connected in series and are arranged between the water outlet of the pre-filter element and the water inlet of the first filter element, the ninth switch is arranged between the drinking water outlet and the water outlet of the post-filter element, the pipeline machine interface is connected to the water outlet of the post-filter element, and the control module is also used to: control the first switch, the seventh switch, the eighth switch and the ninth switch to be turned on, and the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch to be turned off, so as to guide the water source to be filtered through the pre-filter element, the first filter element and the post-filter element, and then flow to the pipeline machine interface and the drinking water outlet.

[0016] In some examples, the system also includes a bubble water outlet, the switch module also includes a tenth switch, the gas-liquid processing module also includes a second bubbler, the tenth switch is connected in series with the second bubbler and is arranged between the output end of the gas-liquid mixer and the bubble water outlet, and the control module is also used to: control the first switch, the second switch, the third switch and the tenth switch to be turned on, and the fourth switch, the fifth switch and the sixth switch to be turned off, so as to guide the water source to be filtered through the pre-filter, and then use the ejector and the gas-liquid mixer to mix the filtered water source to be filtered and the gas to be mixed to form a gas-liquid mixture, and guide the gas-liquid mixture to the second bubbler to generate micro-bubble water and then flow to the bubble water outlet.

[0017] In some examples, the system further includes a pressure reducing valve and a booster pump, wherein the pressure reducing valve is disposed between the third switch and a water inlet end of the ejector, and the booster pump is disposed between an output end of the ejector and an input end of the gas-liquid mixer.

[0018] In some examples, the system also includes a first one-way valve, a second one-way valve and a third one-way valve, the input end of the first one-way valve is connected to the air inlet of the gas to be mixed through the second switch, the output end of the first one-way valve is connected to the air inlet end of the ejector, the input end of the second one-way valve is connected to the water outlet of the post-filter element, the output end of the second one-way valve is connected to the drinking water outlet through the ninth switch, and the output end of the second one-way valve is also connected to one end of the sixth switch, the input end of the third one-way valve is connected to the other end of the sixth switch, and the output end of the third one-way valve is connected to the water outlet of the pre-filter element.

[0019] In some examples, the switch module further includes a high-voltage switch, and the control module is further used to control the high-voltage switch to turn on so as to power on the self-cleaning water purification system.

[0020] In order to achieve the above-mentioned purpose, a second embodiment of the present invention provides a water purifier, including the self-cleaning water purification system of the aforementioned embodiment of the present invention.

[0021] According to the water purifier of the embodiment of the utility model, by adopting the self-cleaning water purification system of the above embodiment of the utility model to clean the first filter element, the water quality and flow rate of the self-cleaning water purification system can be improved, thereby increasing the service life of the filter element and reducing the replacement cost of the filter element, thereby improving the user experience.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a block diagram of a self-cleaning water purification system according to an embodiment of the utility model;

[0024] Figure 2 It is a waterway structure diagram of a self-cleaning system according to a specific embodiment of the utility model;

[0025] Figure 3 It is a block diagram of a water purifier according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] The second filter element 11, the ejector 12, the gas-liquid mixer 13, the first bubbler 14, the first filter element 15, the first switch 16, the second switch 17, the third switch 18, the fourth switch 19, the fifth switch 21, the sixth switch 22, the seventh switch 23, the eighth switch 24, the ninth switch 25, the tenth switch 26, the second bubbler 27, the pressure reducing valve 28, the boosting pump 29, the first check valve 31, the second check valve 32, the third check valve 33, the high-pressure switch 34, and the water inlet tee 35. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The self-cleaning water purification system and water purifier according to the embodiment of the utility model will be described below with reference to the accompanying drawings.

[0030] Figure 1 It is a block diagram of a self-cleaning water purification system according to an embodiment of the utility model.

[0031] Specifically, in some embodiments of the present invention, Figure 1 As shown, the self-cleaning water purification system 100 includes a filtering module 10 , a gas-liquid processing module 20 , a switch module 30 and a control module 40 .

[0032] Wherein, the filtration module 10 includes a first filter element and a second filter element, both of which are used to filter the water source to be filtered, and the second filter element is also used to store a variety of cleaning agents; the gas-liquid processing module 20 is used to perform gas-liquid mixing processing on the cleaning agent, the water source to be filtered and the gas to be mixed to generate different types of microbubble cleaning water; the switch module 30 includes a plurality of switches, and the plurality of switches are used to guide the generation and flow direction of the microbubble cleaning water; the control module 40 is used to control the switch module so that the microbubble cleaning water flows to the first filter element to perform multi-stage cleaning on the first filter element. Wherein, the multiple cleaning agents can be one cleaning agent or two cleaning agents, and the present invention may not specifically limit the number of types of the multiple cleaning agents, that is, the multiple cleaning agents are at least one cleaning agent.

[0033] Further, in some embodiments of the present invention, Figure 2 As shown, the second filter element 11 includes a pre-filter element and a post-filter element, both of which include a water inlet and a water outlet, and the water inlet of the pre-filter element is connected to the water outlet of the water source to be filtered, the pre-filter element can be used to store a primary cleaning agent, and the post-filter element can be used to store a secondary cleaning agent.

[0034] Specifically, in this embodiment, the water source to be filtered enters the pre-filter element through the water inlet of the pre-filter element, mixes with the primary cleaning agent in the pre-filter element to form primary cleaning water, and flows out through the water outlet of the pre-filter element. The filtered water flowing out of the filtered water outlet of the first filter element 15 enters the post-filter element through the water inlet of the post-filter element, mixes with the secondary cleaning agent in the post-filter element to form secondary cleaning water, and flows out through the water outlet of the post-filter element. Among them, the primary cleaning agent can be preferably an alkaline cleaning agent, and the secondary cleaning agent can be preferably an acidic cleaning agent. In addition, the utility model does not need to specifically limit the selection of the primary cleaning agent and the secondary cleaning agent.

[0035] Furthermore, in some embodiments of the present invention, the gas-liquid processing module includes an ejector 12, a gas-liquid mixer 13 and a first bubbler 14, the water inlet end of the ejector 12 is connected to the water outlet of the pre-filter element, the air inlet end of the ejector 12 is connected to the air inlet of the gas to be mixed, the output end of the ejector 12 is connected to the input end of the gas-liquid mixer 13, the output end of the gas-liquid mixer 13 is connected to the input end of the first bubbler 14, and the output end of the first bubbler 14 is connected to the water inlet of the first filter element 15.

[0036] Specifically, in this embodiment, the gas to be mixed enters the ejector 12 through the air inlet end of the ejector 12, the water source to be filtered flows into the pre-filter through the water inlet of the pre-filter, and is mixed with the primary cleaning agent in the pre-filter to form primary cleaning water, the primary cleaning water flows out from the water outlet of the pre-filter, and flows into the ejector 12 through the water inlet end of the ejector 12, the gas to be mixed and the primary cleaning water are preliminarily mixed in the ejector 12, and then flow out through the output end of the ejector 12, and flow into the gas-liquid mixer 13 through the input end of the gas-liquid mixer 13, and the gas-liquid mixer 13 is mixed with the primary cleaning agent in the pre-filter. After being fully mixed, a primary gas-liquid mixture is formed, which flows out through the output end of the gas-liquid mixer 13, and enters the first bubbler 14 through the input end of the first bubbler 14, and generates primary microbubble water under the treatment of the first bubbler 14, and then flows out through the output end of the first bubbler 14, and flows into the first filter element 15 through the water inlet of the first filter element 15, so that the organic matter, grease, colloid and other pollutants deposited on the surface of the filter membrane of the first filter element 15 for a long time can be cleaned by the primary microbubble water, so as to improve the filtering capacity of the first filter element 15. Among them, the first filter element 15 can be preferably a reverse osmosis filter element, the water source to be filtered can be tap water, and the primary cleaning agent can be preferably an alkaline cleaning agent. In addition, the utility model does not need to specifically limit the selection of the primary cleaning agent.

[0037] Furthermore, in some embodiments of the present invention, the first filter element 15 includes a filtered water outlet and a wastewater outlet, the switch module includes a first switch 16, a second switch 17, a third switch 18, a fourth switch 19, a fifth switch 21 and a sixth switch 22, the first switch 16 is arranged between the water outlet of the water source to be filtered and the water inlet of the pre-filter element, the second switch 17 is arranged between the gas outlet of the gas to be mixed and the air inlet end of the ejector 12, the third switch 18 is arranged between the water inlet end of the ejector 12 and the water outlet of the pre-filter element, the fourth switch 19 is arranged between the output end of the gas-liquid mixer 13 and the input end of the first bubbler 14, the fifth switch 21 is arranged at the wastewater outlet of the first filter element 15, and the sixth switch 22 is arranged between the water outlet of the post-filter element and the fourth switch 19.

[0038] Furthermore, in some embodiments of the utility model, the control module is specifically used to: control the first switch 16, the second switch 17, the third switch 18, the fourth switch 19 and the fifth switch 21 to be turned on, and the sixth switch 22 to be turned off, so as to guide the water source to be filtered through the pre-filter, and then use the ejector 12 and the gas-liquid mixer 13 to mix the filtered water source to be filtered and the gas to be mixed to form a primary gas-liquid mixture, and guide the primary gas-liquid mixture to the first bubbler 14 to generate primary microbubble cleaning water and then flow to the first filter element 15, so as to perform primary cleaning on the first filter element 15.

[0039] Specifically, in this embodiment, in the primary cleaning mode, the control module controls the first switch 16, the second switch 17, the third switch 18, the fourth switch 19 and the fifth switch 21 to be turned on, and the sixth switch 22 to be turned off, the gas to be mixed flows to the air inlet of the ejector 12 through the second switch 17, so as to enter the ejector 12 through the air inlet of the ejector 12, the water source to be filtered flows to the water inlet of the pre-filter element through the first switch 16, so as to enter the pre-filter element through the water inlet of the pre-filter element, and is mixed with the primary cleaning agent in the pre-filter element to form primary cleaning water, the primary cleaning water flows out from the water outlet of the pre-filter element, and flows to the water inlet of the ejector 12 after passing through the third switch 18, so as to enter the ejector 12 through the water inlet of the ejector 12, and the gas to be mixed and the primary cleaning water are preliminarily mixed and then pass through the ejector 12. The first-level gas-liquid mixture flows out from the output end of the gas-liquid mixer 13 and flows into the gas-liquid mixer 13 through the input end of the gas-liquid mixer 13. After being fully mixed in the gas-liquid mixer 13, a first-level gas-liquid mixture is formed. The first-level gas-liquid mixture flows out through the output end of the gas-liquid mixer 13 and flows to the input end of the first bubbler 14 after passing through the fourth switch 19, and then enters the first bubbler 14 through the input end of the first bubbler 14. Under the treatment of the first bubbler 14, a first-level micro-bubble water is generated, and then flows out through the output end of the first bubbler 14 and flows into the first filter element 15 through the water inlet of the first filter element 15. Then, the organic matter, grease, colloid and other pollutants deposited on the filter membrane surface of the first filter element 15 for a long time can be cleaned by the first-level micro-bubble water, and the wastewater generated after cleaning flows from the wastewater outlet of the first filter element 15 to the fifth switch 21 and then discharged. Among them, the first-level cleaning agent can be preferably an alkaline cleaning agent. In addition, the utility model does not need to specifically limit the selection of the first-level cleaning agent.

[0040] Furthermore, in some embodiments of the utility model, when the first-level cleaning is completed, the control module is also used to: control the sixth switch 22 to turn on, so as to guide the filtered water flowing out from the filtered water outlet of the first filter element 15 to pass through the post-filter element and then merge with the water outlet of the pre-filter element, and then mix with the gas to be mixed through the ejector 12 and the gas-liquid mixer 13 to form a secondary gas-liquid mixture, and guide the secondary gas-liquid mixture to the first bubbler 14 to generate secondary microbubble cleaning water and then flow to the first filter element 15, so as to perform secondary cleaning on the first filter element 15.

[0041] Specifically, in this embodiment, when the first-level cleaning is completed, the first-level cleaning agent in the pre-filter element is in an exhausted state, and then the second-level cleaning mode is entered, and the control module controls the first switch 16, the second switch 17, the third switch 18, the fourth switch 19, the fifth switch 21 and the sixth switch 22 to be turned on, and the mixed gas flows to the air inlet of the ejector 12 through the second switch 17, so as to enter the ejector 12 through the air inlet of the ejector 12, and the water source flowing out of the filtered water outlet of the first filter element 15 flows to the water inlet of the post-filter element, and flows into the post-filter element through the water inlet of the post-filter element, and is mixed with the second-level cleaning agent in the post-filter element to form second-level cleaning water, and the second-level cleaning water flows out from the water outlet of the post-filter element, and after passing through the sixth switch 22, it merges with the water source flowing out of the water outlet of the pre-filter element, and then flows to the water inlet of the ejector 12 after passing through the third switch 18, so as to flow into the ejector 12 through the water inlet of the ejector 12 In the ejector 12, the gas to be mixed and the secondary cleaning water are preliminarily mixed and then flow out through the output end of the ejector 12, and flow into the gas-liquid mixer 13 through the input end of the gas-liquid mixer 13, and after being fully mixed in the gas-liquid mixer 13, a secondary gas-liquid mixture is formed, and the secondary gas-liquid mixture flows out through the output end of the gas-liquid mixer 13, and flows to the input end of the first bubbler 14 after passing through the fourth switch 19, and then enters the first bubbler 14 through the input end of the first bubbler 14, and generates secondary microbubble water under the treatment of the first bubbler 14, and then flows out through the output end of the first bubbler 14, and flows into the first filter element 15 through the water inlet of the first filter element 15, and then the scale deposited on the filter membrane surface of the first filter element 15 for a long time can be cleaned by the primary microbubble water, and the wastewater generated after cleaning flows from the wastewater outlet of the first filter element 15 to the fifth switch 21 and then discharged. Among them, the wastewater can be concentrated water. Among them, the primary cleaning agent may preferably be an alkaline cleaning agent, and the secondary cleaning agent may preferably be an acidic cleaning agent. In addition, the utility model may not specifically limit the selection of the primary cleaning agent and the secondary cleaning agent.

[0042] Furthermore, in some embodiments of the present invention, the control module is also used to: when the sixth switch 22 is controlled to be turned on, the fifth switch 21 is controlled to be turned off, and when the closing time of the fifth switch 21 is greater than or equal to the first preset time, the fifth switch 21 is controlled to be continuously turned on for a second preset time to complete the secondary cleaning of the first filter element 15.

[0043] Specifically, in this embodiment, when the primary cleaning is completed, the primary cleaning agent in the pre-filter element is in an exhausted state, and then the secondary cleaning mode is entered. The control module controls the first switch 16, the second switch 17, the third switch 18, the fourth switch 19 and the fifth switch 21 to be turned on, and the sixth switch 22 is turned off. The mixed gas flows to the air inlet of the ejector 12 through the second switch 17, so as to enter the ejector 12 through the air inlet of the ejector 12. The water source flowing out of the filtered water outlet of the first filter element 15 flows to the water inlet of the post-filter element, and flows into the post-filter element through the water inlet of the post-filter element, and is mixed with the secondary cleaning agent in the post-filter element to form secondary cleaning water. The secondary cleaning water flows out from the water outlet of the post-filter element, and merges with the water source flowing out of the water outlet of the pre-filter element after passing through the sixth switch 22, and then flows to the water inlet of the ejector 12 after passing through the third switch 18, so as to flow into the ejector 12 through the water inlet of the ejector 12. The mixed gas and the secondary cleaning water are initially mixed. After being combined, it flows out through the output end of the ejector 12, and flows into the gas-liquid mixer 13 through the input end of the gas-liquid mixer 13. After being fully mixed in the gas-liquid mixer 13, a secondary gas-liquid mixture is formed. The secondary gas-liquid mixture flows out through the output end of the gas-liquid mixer 13, and flows to the input end of the first bubbler 14 after passing through the fourth switch 19, and then enters the first bubbler 14 through the input end of the first bubbler 14. Under the treatment of the first bubbler 14, secondary micro-bubble water is generated, which flows out through the output end of the first bubbler 14, and flows into the first filter element 15 through the water inlet of the first filter element 15. Then, the scale deposited on the filter membrane surface of the first filter element 15 for a long time can be cleaned by the secondary micro-bubble water. At the same time, the filtered water after being filtered by the first filter element 15 flows from the filtered water outlet of the first filter element 15 to the water inlet of the post-filter element, so as to flow into the post-filter element through the water inlet of the post-filter element, so as to circulate for the first preset time to fully clean the first filter element 15.

[0044] When the closing time of the fifth switch 21 is greater than or equal to the first preset time, the fifth switch 21 is controlled to be continuously opened for the second preset time, and the scale deposited on the filter membrane surface of the first filter element 15 for a long time is cleaned by the secondary microbubble water, and the wastewater generated after cleaning flows from the wastewater outlet of the first filter element 15 to the fifth switch 21 and is continuously discharged. The wastewater may be concentrated water.

[0045] It should be noted that the value range of the first preset time can be preferably 20 minutes to 25 minutes, and the value range of the second preset time can be preferably 5 minutes to 10 minutes. In addition, the utility model may not specifically limit the value range of the third preset time and the fourth preset time. Among them, the first-level cleaning agent can be preferably an alkaline cleaning agent, and the second-level cleaning agent can be preferably an acidic cleaning agent. In addition, the utility model may not specifically limit the selection of the first-level cleaning agent and the second-level cleaning agent.

[0046] Furthermore, in some embodiments of the present invention, at the end of the secondary cleaning stage, the consumption of multiple cleaning agents in the second filter element 11 is completed. The multiple cleaning agents may be one cleaning agent or two cleaning agents, and the present invention may not specifically limit the types and quantities of the multiple cleaning agents, that is, the multiple cleaning agents are at least one cleaning agent.

[0047] Furthermore, in some embodiments of the present invention, the system also includes a drinking water outlet and a pipeline machine interface, the switch module also includes a seventh switch 23, an eighth switch 24 and a ninth switch 25, the seventh switch 23 and the eighth switch 24 are connected in series and are arranged between the water outlet of the pre-filter element and the water inlet of the first filter element 15, the ninth switch 25 is arranged between the drinking water outlet and the water outlet of the post-filter element, the pipeline machine interface is connected to the water outlet of the post-filter element, and the control module is also used to: control the first switch 16, the seventh switch 23, the eighth switch 24 and the ninth switch 25 to be turned on, and the second switch 17, the third switch 18, the fourth switch 19, the fifth switch 21 and the sixth switch 22 to be turned off, so as to guide the water source to be filtered through the pre-filter element, the first filter element 15 and the post-filter element, and then flow to the pipeline machine interface and the drinking water outlet.

[0048] Specifically, in this embodiment, the cleaning agents in the pre-filter element and the post-filter element are in an exhausted state. In the drinking water outlet mode, the control module controls the first switch 16, the seventh switch 23, the eighth switch 24 and the ninth switch 25 to be turned on, and the second switch 17, the third switch 18, the fourth switch 19, the fifth switch 21 and the sixth switch 22 to be turned off. The water source to be filtered flows to the water inlet of the pre-filter element through the first switch 16, and enters the pre-filter element through the water inlet of the pre-filter element. Under the filtering effect of the pre-filter element, the water source to be filtered flows to the water inlet of the pre-filter element through the water inlet of the pre-filter element. The water flows out from the outlet of the pre-filter element, and flows through the seventh switch 23 and the eighth switch 24 in sequence, and then flows to the water inlet of the first filter element 15, and then enters the first filter element 15 through the water inlet of the first filter element 15, and flows from the filtered water outlet of the first filter element 15 to the water inlet of the post-filter element under the filtering action of the first filter element 15, and flows into the post-filter element through the water inlet of the post-filter element, and flows from the water outlet of the post-filter element to the pipeline machine interface under the filtering action of the post-filter element, and flows to the drinking water outlet through the ninth switch 25. Among them, the seventh switch 23, the eighth switch 24 and the ninth switch 25 can be preferably solenoid valves. In addition, the utility model does not need to specifically limit the selection of the seventh switch 23, the eighth switch 24 and the ninth switch 25.

[0049] Furthermore, in some embodiments of the utility model, the system also includes a bubble water outlet, the switch module also includes a tenth switch 26, the gas-liquid processing module also includes a second bubbler 27, the tenth switch 26 and the second bubbler 27 are connected in series and are arranged between the output end of the gas-liquid mixer 13 and the bubble water outlet, and the control module is also used to: control the first switch 16, the second switch 17, the third switch 18 and the tenth switch 26 to be turned on, and the fourth switch 19, the fifth switch 21 and the sixth switch 22 to be turned off, so as to guide the water source to be filtered through the pre-filter, and then use the ejector 12 and the gas-liquid mixer 13 to mix the filtered water source to be filtered and the gas to be mixed to form a gas-liquid mixture, and guide the gas-liquid mixture to the second bubbler 27 to generate micro-bubble water and then flow to the bubble water outlet.

[0050] Specifically, in this embodiment, the cleaning agents in the pre-filter and the post-filter are in an exhausted state. In the bubble water outlet mode, the control module controls the first switch 16, the second switch 17, the third switch 18 and the tenth switch 26 to be turned on, and the fourth switch 19, the fifth switch 21 and the sixth switch 22 to be turned off. The mixed gas flows to the air inlet of the ejector 12 through the second switch 17, and enters the ejector 12 through the air inlet of the ejector 12. The water source to be filtered flows to the water inlet of the pre-filter through the first switch 16, and enters the pre-filter through the water inlet of the pre-filter. Under the filtering action of the pre-filter, it flows out from the water outlet of the pre-filter, and flows to the ejector through the third switch 18. The water inlet of the ejector 12 enters the ejector 12 through the water inlet of the ejector 12, and the mixed gas and the water source filtered by the pre-filter are preliminarily mixed and then flow out through the output end of the ejector 12, and flow into the gas-liquid mixer 13 through the input end of the gas-liquid mixer 13, and form a gas-liquid mixture after being fully mixed in the gas-liquid mixer 13, and the gas-liquid mixture flows out through the output end of the gas-liquid mixer 13, and flows to the input end of the second bubbler 27 after passing through the tenth switch 26, and then enters the second bubbler 27 through the input end of the second bubbler 27, and generates micro-bubble water under the treatment of the second bubbler 27, so as to flow to the bubble water outlet through the output end of the second bubbler 27. Among them, the tenth switch 26 can be preferably a solenoid valve, and in addition, the utility model can not specifically limit the selection of the tenth switch 26.

[0051] Furthermore, in some embodiments of the present invention, the system also includes a pressure reducing valve 28 and a booster pump 29, the pressure reducing valve 28 is arranged between the third switch 18 and the water inlet end of the ejector 12, and the booster pump 29 is arranged between the output end of the ejector 12 and the input end of the gas-liquid mixer 13.

[0052] Furthermore, in some embodiments of the present invention, the system also includes a first one-way valve 31, a second one-way valve 32 and a third one-way valve 33, the input end of the first one-way valve 31 is connected to the air inlet of the gas to be mixed through the second switch 17, the output end of the first one-way valve 31 is connected to the air inlet end of the ejector 12, the input end of the second one-way valve 32 is connected to the water outlet of the post-filter element, the output end of the second one-way valve 32 is connected to the drinking water outlet through the ninth switch 25, and the output end of the second one-way valve 32 is also connected to one end of the sixth switch 22, the input end of the third one-way valve 33 is connected to the other end of the sixth switch 22, and the output end of the third one-way valve 33 is connected to the water outlet of the pre-filter element.

[0053] Specifically, in this embodiment, the setting of the first one-way valve 31 can ensure the flow method of the mixed gas, that is, the gas to be mixed can only enter the first one-way valve 31 through the input end of the first one-way valve 31, and enter the air inlet end of the ejector 12 through the output end of the first one-way valve 31. The setting of the second one-way valve 32 is used to ensure the flow method of the filtered water source, that is, the filtered water source flowing out of the outlet of the post-filter element can only flow into the second one-way valve 32 from the input end of the second one-way valve 32, and flow to the sixth switch 22 through the output end of the second one-way valve 32. The setting of the third one-way valve 33 is used to ensure the flow method of the filtered water source, that is, the water source flowing through the sixth switch 22 can only flow into the third one-way valve 33 from the input end of the third one-way valve 33, and flow to the outlet of the pre-filter element through the output end of the third one-way valve 33.

[0054] Furthermore, in some embodiments of the present invention, the switch module further includes a high-voltage switch 34, and the control module is further used to control the high-voltage switch 34 to turn on, so as to power on the self-cleaning water purification system.

[0055] In summary, in a specific embodiment of the present invention, the primary cleaning agent is an alkaline cleaning agent, and the secondary cleaning agent is an acidic cleaning agent. In the alkaline cleaning mode, the control module controls the first switch 16, the second switch 17, the third switch 18, the fourth switch 19 and the fifth switch 21 to be turned on, and the sixth switch 22, the seventh switch 23, the eighth switch 24 and the ninth switch 25 to be turned off. The mixed gas flows to the input end of the first one-way valve 31 after passing through the second switch 17, and then flows through the output end of the first one-way valve 31. The water source to be filtered flows to the air inlet of the ejector 12, enters the ejector 12 through the air inlet of the ejector 12, flows to the water inlet of the pre-filter through the water inlet of the pre-filter, mixes with the alkaline cleaning agent in the pre-filter to form alkaline cleaning water, flows out from the water outlet of the pre-filter, flows to the pressure reducing valve 28 after passing through the third switch 18, and flows into the water inlet of the ejector 12 with a relatively low pressure water flow under the control of the pressure reducing valve 28, so as to pass through the water inlet of the pre-filter. The water inlet of the ejector 12 enters the ejector 12, and the mixed gas and the alkaline cleaning water are preliminarily mixed and then flow out through the output end of the ejector 12, flow to the booster pump 29 through the output end of the ejector 12, and then flow into the input end of the gas-liquid mixer 13 under the action of the booster pump 29, and form an alkaline gas-liquid mixture after being fully mixed in the gas-liquid mixer 13. The alkaline gas-liquid mixture flows out through the output end of the gas-liquid mixer 13, and flows to the input end of the first bubbler 14 after passing through the fourth switch 19. Then, the alkaline microbubble water enters the first bubbler 14 through the input end of the first bubbler 14, generates alkaline microbubble water under the treatment of the first bubbler 14, and then flows out through the output end of the first bubbler 14, and flows into the first filter element 15 through the water inlet of the first filter element 15, and then the organic matter, grease, colloid and other pollutants deposited on the surface of the filter membrane of the first filter element 15 for a long time can be cleaned by the alkaline microbubble water, and the wastewater generated after cleaning flows from the wastewater outlet of the first filter element 15 to the fifth switch 21 and then discharged.

[0056] When alkaline cleaning is completed, the alkaline cleaning agent in the pre-filter is in an exhausted state, and then enters the acid cleaning mode, the control module controls the first switch 16, the second switch 17, the third switch 18, the fourth switch 19 and the sixth switch 22 to be turned on, and the fifth switch 21, the seventh switch 23, the eighth switch 24 and the ninth switch 25 to be turned off, and the mixed gas flows to the input end of the first one-way valve 31 after passing through the second switch 17, and then flows to the air inlet of the ejector 12 through the output end of the first one-way valve 31, so as to enter the ejector 12 through the air inlet of the ejector 12, and the water source flowing out of the filtered water outlet of the first filter element 15 flows to the post-filter The acidic cleaning water flows from the water outlet of the rear filter element to the water inlet of the second one-way valve 32, and flows into the second one-way valve 32 through the water inlet of the second one-way valve 32, and flows from the water outlet of the second one-way valve 32 through the sixth switch 22 to the water inlet of the third one-way valve 33, and flows into the third one-way valve 33 through the water inlet of the third one-way valve 33, so that the acidic cleaning water flows out through the water outlet of the third one-way valve 33 and merges with the water source flowing out of the water outlet of the front filter element, and then flows to the water source after passing through the third switch 18. The pressure reducing valve 28 is controlled by the pressure reducing valve 28, and a relatively low-pressure water flow flows into the water inlet of the ejector 12, thereby flowing into the ejector 12 through the water inlet of the ejector 12, and the mixed gas and the acidic cleaning water are preliminarily mixed and then flow out through the output end of the ejector 12, and flow to the booster pump 29 through the output end of the ejector 12, and then flow into the input end of the gas-liquid mixer 13 under the action of the booster pump 29, and form an acidic gas-liquid mixture after being fully mixed in the gas-liquid mixer 13, and the acidic gas-liquid mixture flows out through the output end of the gas-liquid mixer 13, and flows to the input end of the first bubbler 14 after passing through the fourth switch 19. , and then enters the first bubbler 14 through the input end of the first bubbler 14, and generates acidic micro-bubble water under the treatment of the first bubbler 14, which then flows out through the output end of the first bubbler 14 and flows into the first filter element 15 through the water inlet of the first filter element 15, and then the scale deposited on the filter membrane surface of the first filter element 15 for a long time can be cleaned by the acidic micro-bubble water, and at the same time, the filtered water after the first filter element 15 flows from the filtered water outlet of the first filter element 15 to the water inlet of the post-filter element, so as to flow into the post-filter element through the water inlet of the post-filter element, and circulates for the first preset time to fully clean the first filter element 15.

[0057] When the closing time of the fifth switch 21 is greater than or equal to the first preset time, the fifth switch 21 is controlled to be continuously opened for the second preset time, and the scale deposited on the filter membrane surface of the first filter element 15 for a long time is cleaned by acidic microbubble water, and the waste water generated after cleaning flows from the waste water outlet of the first filter element 15 to the fifth switch 21 and is continuously discharged. At the end of the acid cleaning stage, the cleaning agents in the pre-filter element and the post-filter element are both in an exhausted state.

[0058] In the bubble water outlet mode, the cleaning agents in the pre-filter and the post-filter are in an exhausted state, the control module controls the first switch 16, the second switch 17, the third switch 18 and the tenth switch 26 to be turned on, and the fourth switch 19, the fifth switch 21, the sixth switch 22, the seventh switch 23, the eighth switch 24 and the ninth switch 25 to be closed, the mixed gas flows to the input end of the first one-way valve 31 through the second switch 17, and then flows to the air inlet of the ejector 12 through the output end of the first one-way valve 31, so as to enter the ejector 12 through the air inlet of the ejector 12, the water source to be filtered flows to the water inlet of the pre-filter through the first switch 16, so as to enter the pre-filter through the water inlet of the pre-filter, and flows out from the water outlet of the pre-filter under the filtering action of the pre-filter, and flows to the pressure reducing valve 28 after passing through the third switch 18, and under the control of the pressure reducing valve 28, A relatively low-pressure water flow flows into the water inlet of the ejector 12, and then enters the ejector 12 through the water inlet of the ejector 12. The mixed gas and the water source filtered by the pre-filter are preliminarily mixed and then flow out through the output end of the ejector 12, and the output end of the ejector 12 flows to the booster pump 29, and then flows into the input end of the gas-liquid mixer 13 under the action of the booster pump 29, and then flows into the gas-liquid mixer 13 through the input end of the gas-liquid mixer 13, and forms a gas-liquid mixture after being fully mixed in the gas-liquid mixer 13. The gas-liquid mixture flows out through the output end of the gas-liquid mixer 13, and flows to the input end of the second bubbler 27 after passing through the tenth switch 26, and then enters the second bubbler 27 through the input end of the second bubbler 27, and generates micro-bubble water under the processing of the second bubbler 27, and then flows to the bubble water outlet through the output end of the second bubbler 27.

[0059] In the drinking water outlet mode, the cleaning agents in the pre-filter and the post-filter are in an exhausted state, the control module controls the first switch 16, the seventh switch 23, the eighth switch 24 and the ninth switch 25 to be turned on, and the second switch 17, the third switch 18, the fourth switch 19, the fifth switch 21 and the sixth switch 22 to be turned off, and the filtered water flows to the water inlet of the pre-filter through the first switch 16, enters the pre-filter through the water inlet of the pre-filter, flows out from the water outlet of the pre-filter under the filtering action of the pre-filter, and flows through the seventh switch 23, the booster pump 29 and the eighth switch 25. 24 and then flows to the water inlet of the first filter element 15, and then enters the first filter element 15 through the water inlet of the first filter element 15, flows from the filtered water outlet of the first filter element 15 to the water inlet of the post filter element under the filtering action of the first filter element 15, flows into the post filter element through the water inlet of the post filter element, flows from the water outlet of the post filter element to the input end of the second one-way valve 32 under the filtering action of the post filter element, enters the second one-way valve 32 through the input end of the second one-way valve 32, and flows to the pipeline machine interface through the output end of the second one-way valve 32, and flows to the drinking water outlet through the ninth switch 25. A high-pressure switch 34 is also provided between the second one-way valve and the ninth switch 25, which is used to power on the self-cleaning water purification system.

[0060] It should be noted that a water inlet tee 35 is provided between the water inlet of the water source to be filtered and the first switch 16 for balancing and regulating the water flow of the water source to be filtered and reducing the resistance of the water flow.

[0061] In summary, according to the self-cleaning water purification system of the embodiment of the utility model, by cleaning the first filter element, the water quality and flow rate of the self-cleaning water purification system can be improved, thereby increasing the service life of the filter element and reducing the replacement cost of the filter element, thereby improving the user experience.

[0062] Figure 3 It is a block diagram of a water purifier according to an embodiment of the utility model.

[0063] Specifically, if Figure 3 As shown, the water purifier 1000 includes the self-cleaning water purification system 100 of the above embodiment of the utility model.

[0064] According to the water purifier of the embodiment of the utility model, by adopting the self-cleaning water purification system of the above embodiment of the utility model to clean the first filter element, the water quality and flow rate of the self-cleaning water purification system can be improved, thereby increasing the service life of the filter element and reducing the replacement cost of the filter element, thereby improving the user experience.

[0065] In addition, other structures and functions of the water purifier of the embodiment of the utility model are known to those skilled in the art and will not be described in detail here to reduce redundancy.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A self-cleaning water purification system, characterized in that: The system comprises: A filter module, the filter module comprising a first filter element and a second filter element, the first filter element and the second filter element are both used to filter the water source to be filtered, and the second filter element is also used to store a variety of cleaning agents; A gas-liquid processing module, the gas-liquid processing module is used to perform gas-liquid mixing processing on the cleaning agent, the water source to be filtered and the gas to be mixed, so as to generate different types of micro-bubble cleaning water; A switch module, the switch module comprising a plurality of switches, the plurality of switches being used to guide the generation and flow direction of the micro-bubble cleaning water; A control module is used to control the switch module so that the micro-bubble cleaning water flows to the first filter element to perform multi-stage cleaning on the first filter element.

2. The self-cleaning water purification system according to claim 1, characterized in that: The second filter element includes a pre-filter element and a post-filter element, and both the pre-filter element and the post-filter element include a water inlet and a water outlet, and the water inlet of the pre-filter element is connected to the water outlet of the water source to be filtered. The pre-filter element can be used to store a primary cleaning agent, and the post-filter element can be used to store a secondary cleaning agent.

3. The self-cleaning water purification system according to claim 2, characterized in that: The gas-liquid processing module includes an ejector, a gas-liquid mixer and a first bubbler, the water inlet end of the ejector is connected to the water outlet of the pre-filter element, the air inlet end of the ejector is connected to the air inlet of the gas to be mixed, the output end of the ejector is connected to the input end of the gas-liquid mixer, the output end of the gas-liquid mixer is connected to the input end of the first bubbler, and the output end of the first bubbler is connected to the water inlet of the first filter element.

4. The self-cleaning water purification system according to claim 3, characterized in that: The first filter element includes a filtered water outlet and a wastewater outlet, and the switch module includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch. The first switch is arranged between the water outlet of the water source to be filtered and the water inlet of the pre-filter element, the second switch is arranged between the gas outlet of the gas to be mixed and the gas inlet end of the ejector, the third switch is arranged between the water inlet end of the ejector and the water outlet of the pre-filter element, the fourth switch is arranged between the output end of the gas-liquid mixer and the input end of the first bubbler, the fifth switch is arranged at the wastewater outlet of the first filter element, and the sixth switch is arranged between the water outlet of the post-filter element and the fourth switch.

5. The self-cleaning water purification system according to claim 4, characterized in that: The control module is specifically used for: The first switch, the second switch, the third switch, the fourth switch and the fifth switch are controlled to be turned on, and the sixth switch is turned off, so as to guide the water source to be filtered through the pre-filter element, and then use the ejector and the gas-liquid mixer to mix the filtered water source to be filtered and the gas to be mixed to form a primary gas-liquid mixture, and then guide the primary gas-liquid mixture to the first bubbler to generate primary microbubble cleaning water and then flow to the first filter element, so as to perform primary cleaning on the first filter element.

6. The self-cleaning water purification system according to claim 5, characterized in that: When the primary cleaning is completed, the control module is further used to: The sixth switch is controlled to be turned on to guide the filtered water flowing out from the filtered water outlet of the first filter element to pass through the post-filter element and then merge with the water outlet of the pre-filter element, and then mix with the gas to be mixed through the ejector and the gas-liquid mixer to form a secondary gas-liquid mixture, and the secondary gas-liquid mixture is guided to the first bubbler to generate secondary microbubble cleaning water and then flow to the first filter element to perform secondary cleaning on the first filter element.

7. The self-cleaning water purification system according to claim 6, characterized in that: The control module is also used for: When the sixth switch is controlled to be turned on, the fifth switch is controlled to be turned off, and when the closing time of the fifth switch is greater than or equal to the first preset time, the fifth switch is controlled to be continuously turned on for the second preset time to complete the secondary cleaning of the first filter element.

8. The self-cleaning water purification system according to claim 7, characterized in that: At the end of the secondary cleaning stage, the consumption of the multiple cleaning agents in the second filter element is completed.

9. The self-cleaning water purification system according to claim 8, characterized in that: The system further includes a drinking water outlet and a pipeline machine interface, the switch module further includes a seventh switch, an eighth switch and a ninth switch, the seventh switch and the eighth switch are connected in series and arranged between the water outlet of the pre-filter element and the water inlet of the first filter element, the ninth switch is arranged between the drinking water outlet and the water outlet of the post-filter element, the pipeline machine interface is connected to the water outlet of the post-filter element, and the control module is further used for: The first switch, the seventh switch, the eighth switch and the ninth switch are controlled to be turned on, and the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch are controlled to be turned off, so as to guide the water source to be filtered through the pre-filter element, the first filter element and the post-filter element, and then flow to the pipeline machine interface and the drinking water outlet.

10. The self-cleaning water purification system according to claim 8, characterized in that: The system further includes a bubble water outlet, the switch module further includes a tenth switch, the gas-liquid processing module further includes a second bubbler, the tenth switch and the second bubbler are connected in series and arranged between the output end of the gas-liquid mixer and the bubble water outlet, and the control module is further used for: The first switch, the second switch, the third switch and the tenth switch are controlled to be turned on, and the fourth switch, the fifth switch and the sixth switch are controlled to be turned off, so as to guide the water source to be filtered through the pre-filter, and then use the ejector and the gas-liquid mixer to mix the filtered water source to be filtered and the gas to be mixed to form a gas-liquid mixture, and then guide the gas-liquid mixture to the second bubbler to generate micro-bubble water and then flow to the bubble water outlet.

11. The self-cleaning water purification system according to claim 4, characterized in that: The system further comprises a pressure reducing valve and a booster pump, wherein the pressure reducing valve is arranged between the third switch and the water inlet end of the ejector, and the booster pump is arranged between the output end of the ejector and the input end of the gas-liquid mixer.

12. The self-cleaning water purification system according to claim 9, characterized in that: The system also includes a first one-way valve, a second one-way valve and a third one-way valve, the input end of the first one-way valve is connected to the air inlet of the gas to be mixed through the second switch, the output end of the first one-way valve is connected to the air inlet end of the ejector, the input end of the second one-way valve is connected to the water outlet of the post-filter element, the output end of the second one-way valve is connected to the drinking water outlet through the ninth switch, and the output end of the second one-way valve is also connected to one end of the sixth switch, the input end of the third one-way valve is connected to the other end of the sixth switch, and the output end of the third one-way valve is connected to the water outlet of the pre-filter element.

13. The self-cleaning water purification system according to any one of claims 1 to 12, characterized in that: The switch module further includes a high-voltage switch, and the control module is further used for: The high-voltage switch is controlled to be turned on to power on the self-cleaning water purification system.

14. A water purifier, characterized in that: A self-cleaning water purification system comprising any one of claims 1-13.

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