Water purifying device and filter cleaning system and method

Abstract

The present application relates to water purification technical field, disclose a water purification device and filter cleaning system and method, the system comprises: pretreatment filter element;Detection device is set up for the pretreatment filter element, is used for detecting the information of the pretreatment filter element's blockage;Cleaning device is used for cleaning the pretreatment filter element, and the cleaning device includes the cleaning pipeline that is set up in parallel with the water inlet pipeline of the pretreatment filter element and the chemical cleaning component that is set up on the cleaning pipeline;Control module is suitable for according to the information of the blockage of the pretreatment filter element detected by detection device to control the work of cleaning device.The method comprises: obtaining the information of the blockage of the pretreatment filter element;When judging the blockage degree of the pretreatment filter element is greater than the set blockage degree threshold, open the cleaning regeneration mode of the pretreatment filter element;Control cleaning device to start chemical cleaning to the pretreatment filter element.The present application can realize the regeneration of filter element, effectively prolong the service life of filter element, reduce the frequency of replacing filter element, improve user experience, reduce user cost.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically to water purification devices and filter cleaning systems and methods. Background Technology

[0002] As people's requirements for drinking water quality become increasingly stringent, water purification devices are becoming more and more common in households. Filter cartridges, as the core component of water purification devices, are used for deep filtration and purification of raw water. The purification effect of a water purification device depends on the filter cartridge's ability to retain and adsorb impurities and other pollutants in the raw water. However, with prolonged use, filter cartridges can become clogged by impurities in the water, rendering them unable to perform their purification function. This is especially true for primary filter cartridges, which are the first to come into contact with the raw water and are therefore very prone to clogging.

[0003] Therefore, before the filter cartridge becomes completely clogged with contaminants and reaches the end of its lifespan, it must be treated to ensure the user's drinking water experience and water safety. However, most existing water purification devices solve the problem of filter cartridge clogging by contaminants by replacing the cartridges. In areas with good water quality, the pretreatment filter cartridge has a low load and a relatively long service life, but in areas with poor water quality, the filter cartridge has a high load, a relatively short service life, and requires more frequent replacements, resulting in a poor user experience and higher operating costs. Summary of the Invention

[0004] In view of this, the present invention provides a water purification device and filter cleaning system and method that can regenerate filter cartridges, in order to solve the problem that the filter cartridges of existing water purification devices are replaced frequently, resulting in poor user experience and increased operating costs.

[0005] In a first aspect, the present invention provides a filter cartridge cleaning system for a water purification device, the filter cartridge cleaning system comprising:

[0006] Pre-treatment filter element;

[0007] The detection device, which is set up according to the pretreatment filter element, is used to detect the clogging information of the pretreatment filter element;

[0008] A cleaning device for cleaning a pretreatment filter element, the cleaning device including a cleaning pipeline connected in parallel with the water inlet pipeline of the pretreatment filter element and a chemical cleaning component installed on the cleaning pipeline;

[0009] The control module is adapted to control the operation of the cleaning device based on the clogging information of the pre-treatment filter element detected by the detection device.

[0010] Beneficial effects: By adding cleaning pipelines and chemical cleaning components, and using a detection device corresponding to the pretreatment filter cartridge to detect clogging information, the chemical cleaning component can be activated when the pretreatment filter cartridge is severely clogged. This chemical cleaning removes contaminants adhering to the filter cartridge, thereby regenerating the filter cartridge, effectively extending its service life, reducing the frequency of filter cartridge replacement, improving user experience, and lowering user costs. This effectively solves the problems of short filter cartridge life and frequent replacement in existing water purification devices, which lead to poor user experience and increased operating costs.

[0011] In one alternative embodiment, the chemical cleaning assembly includes:

[0012] The cleaning agent module has an internal storage chamber for storing chemical cleaning agents;

[0013] The first switch is installed on the cleaning pipeline and is located upstream of the cleaning agent module;

[0014] When the first switch is turned on, the raw water can pass through the cleaning agent module and dissolve the chemical cleaning agent in the storage chamber. The dissolved chemical cleaning agent flows into the pretreatment filter cartridge with the water flow and reacts with the deposits on the pretreatment filter cartridge.

[0015] Beneficial effects: The cleaning agent module stores chemical cleaning agents. The first switch controls whether the cleaning agent module releases the cleaning agent. In normal water production mode, the first switch is closed, and the chemical cleaning agent in the cleaning agent storage structure will not enter the pretreatment filter cartridge. When the filter cartridge needs to be cleaned, i.e., when the filter cartridge cleaning and regeneration mode is activated, the first switch is opened, allowing raw water to enter the cleaning agent module through the first switch. The cleaning agent module releases chemical cleaning agents, which are soluble in water and can enter the pretreatment filter cartridge with the water flow. The chemical cleaning agent solution entering the pretreatment filter cartridge can react with the contaminants attached to the pretreatment filter cartridge, causing a chemical reaction that desorbs the contaminants from the pretreatment filter cartridge, thereby achieving the purpose of cleaning the pretreatment filter cartridge.

[0016] In one optional embodiment, the cleaning device further includes:

[0017] A check valve structure is installed on the cleaning pipeline, located between the cleaning agent module and the pretreatment filter element;

[0018] The check valve is configured to restrict the flow of water from the self-cleaning agent module to the pretreatment filter cartridge in one direction.

[0019] Beneficial effects: The anti-backflow structure ensures that the cleaning water can flow normally into the pretreatment filter element, while effectively preventing the water in the pretreatment filter element from flowing back into the cleaning agent module or the first switch.

[0020] In one optional implementation, the detection device includes:

[0021] The flow detection unit is located at the purified water outlet of the pretreatment filter cartridge. The flow detection unit is used to detect the production water flow of the pretreatment filter cartridge in real time.

[0022] The control module is adapted to determine whether to activate the cleaning and regeneration mode of the pretreatment filter cartridge based on the product water flow information detected by the flow detection unit.

[0023] Beneficial effects: The flow rate of the pretreatment filter cartridge is detected by the flow detection device. When the flow rate of the pretreatment filter cartridge is less than the preset flow rate, the cleaning and regeneration mode of the pretreatment filter cartridge is activated. The judgment method is simple, accurate and efficient.

[0024] In one optional embodiment, the pretreatment filter cartridge has a purified water outlet, and the filter cartridge cleaning system further includes:

[0025] The water purification pipeline is connected to the water purification outlet, and the flow detection unit is installed on the water purification pipeline;

[0026] The second switch is installed on the water purification pipeline and is used to control the on / off state of the water purification pipeline.

[0027] Beneficial effects: The second switch can control the flow of water in the water purification pipeline, which not only enables the connection between the pretreatment filter cartridge and the next stage filter cartridge, namely the reverse osmosis membrane filter cartridge, but also facilitates the settling process of the pretreatment filter cartridge, thereby improving the cleaning effect of the pretreatment filter cartridge.

[0028] In one optional embodiment, the water purification device further includes:

[0029] Primary filter element; the pretreatment filter element is the primary filter element.

[0030] The inlet end of the reverse osmosis membrane filter element is connected to the purified water outlet of the pretreatment filter element, and the outlet end is connected to the inlet of the reverse osmosis membrane filter element.

[0031] A pressure stabilizing pump is installed on the purified water pipeline. The pressure stabilizing pump is used to adjust the water pressure inside the reverse osmosis membrane filter element.

[0032] The inlet of the post-filter is connected to the purified water outlet of the reverse osmosis membrane filter. The pure water produced by the post-filter is discharged through the pure water outlet of the post-filter.

[0033] Beneficial effects: The pressure-stabilizing pump effectively ensures the water pressure inside the reverse osmosis membrane filter, thereby improving the water treatment effect of the reverse osmosis membrane filter. The post-filter effectively improves the taste of the purified water.

[0034] In one optional implementation, the filter cleaning system further includes:

[0035] Wastewater discharge pipeline, connected to the clean wastewater outlet, is used to discharge wastewater after cleaning;

[0036] The third switch is installed on the wastewater discharge pipeline to control whether the clean wastewater from the pretreatment filter cartridge is discharged.

[0037] Beneficial effects: The wastewater discharge pipeline and the third switch can automatically discharge the clean wastewater from the pretreatment filter.

[0038] In one alternative embodiment, the inlet of the water inlet pipe is adapted to be connected to an external water source, and a fourth switch is provided on the water inlet pipe, with the cleaning pipe and the fourth switch connected in parallel.

[0039] Beneficial effects: The water inlet of the pretreatment filter element is controlled by the fourth switch, and the cleaning pipeline is set in parallel with the fourth switch, so that the water inlet of the cleaning pipeline and the water inlet pipeline do not affect each other.

[0040] Secondly, the present invention also provides a filter element cleaning method, applicable to the filter element cleaning system of the water purification device in any of the above embodiments, the filter element cleaning method comprising:

[0041] Obtain information on the clogging of the pretreatment filter cartridge;

[0042] When it is determined that the degree of clogging of the pretreatment filter element is greater than the set clogging threshold, the cleaning and regeneration mode of the pretreatment filter element is activated.

[0043] The control cleaning device is activated to perform chemical cleaning on the pretreatment filter element.

[0044] In one optional implementation, when it is determined that the degree of clogging of the pretreatment filter element is greater than a set clogging threshold, the cleaning and regeneration mode of the pretreatment filter element is activated, specifically including the following steps:

[0045] Real-time acquisition of pre-treatment filter cartridge permeate flow rate information;

[0046] When it is determined that the pretreatment filter cartridge's water flow rate Q is less than the preset flow rate Q0, the pretreatment filter cartridge's cleaning and regeneration mode is activated.

[0047] Beneficial effects: By installing a flow detection unit at the product water end after the pretreatment filter cartridge, the flow rate of the pretreatment filter cartridge can be detected, thereby determining whether to start the cleaning and regeneration program of the pretreatment filter cartridge. This effectively extends the service life of the pretreatment filter cartridge, reduces the frequency of cartridge replacement, improves user experience, and reduces user operating costs.

[0048] In one optional implementation, the cleaning device is activated to chemically clean the pretreatment filter element, specifically including the following steps:

[0049] The second and fourth switches are closed, and the first and third switches are opened. When the preset cleaning time is reached, the settling program is started.

[0050] The first and third switches are closed, and the rinsing procedure begins when the preset settling time is reached.

[0051] The first and second switches are kept closed, while the third and fourth switches are opened, so that the wastewater in the pretreatment filter element is discharged through the wastewater discharge pipe.

[0052] When the preset rinsing time is reached, the third switch is closed, ending the filter element cleaning and regeneration mode.

[0053] In one optional implementation, the cleaning method further includes the following steps:

[0054] Calculate the difference △Q between the pre-treatment filter cartridge's permeable flow rate Q and the preset flow rate Q0, and determine the preset cleaning time and / or preset settling time based on the difference △Q.

[0055] Beneficial effects: By determining the difference ΔQ between the pre-treatment filter cartridge's water flow rate Q and the preset flow rate Q0, the preset cleaning time and / or preset settling time can be determined. This allows for control over the amount of chemical agent added and the settling time, resulting in better cleaning of the filter cartridge and avoiding resource waste.

[0056] Thirdly, the present invention also provides a water purification device, which includes the filter cleaning system of any of the above embodiments. Attached Figure Description

[0057] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0058] Figure 1This is a schematic diagram of the first embodiment of the filter element cleaning system of the water purification device in this invention.

[0059] Figure 2 This is a schematic diagram of the second embodiment of the filter element cleaning system of the water purification device in this invention.

[0060] Figure 3 This is a schematic diagram of the third embodiment of the filter element cleaning system of the water purification device in this invention.

[0061] Figure 4 This is a schematic diagram of the structure of the cleaning agent module in a first embodiment of the present invention;

[0062] Figure 5 This is a schematic diagram of the structure of the cleaning agent module in a second embodiment of the present invention;

[0063] Figure 6 This is a schematic flowchart of the first embodiment of the filter element cleaning method in this invention.

[0064] Figure 7 This is a schematic flowchart of a second embodiment of the filter element cleaning method in this invention.

[0065] Figure 8 This is a schematic flowchart of the third embodiment of the filter element cleaning method in this invention.

[0066] Figure 9 This is a schematic flowchart of the fourth embodiment of the filter element cleaning method in this invention.

[0067] Explanation of reference numerals in the attached figures:

[0068] 10. Pretreatment filter element; 11. Inlet water pipe; 111. Fourth switch; 12. Purified water pipe; 121. Second switch; 13. Wastewater discharge pipe; 131. Third switch;

[0069] 20. Detection device;

[0070] 30. Cleaning device; 31. Cleaning pipeline; 32. Cleaning agent module; 321. Membrane housing; 322. Chemical cleaning agent; 3221. First cleaning agent; 3222. Second cleaning agent; 33. First switching element; 34. Check valve structure; 35. Fifth switching element;

[0071] 40. Pressure stabilizing pump;

[0072] 50. Reverse osmosis membrane filter element; 51. Sixth switch element; 60. Post-filter element; 61. Pure water outlet. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0074] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0075] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0076] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0077] The purification effect of a water purifier depends on the filter cartridge's ability to retain and adsorb impurities and other contaminants in the raw water. Before the filter cartridge becomes completely clogged with contaminants and reaches the end of its lifespan, it must be treated to ensure the user's drinking water experience and water safety. However, existing water purifiers lack pre-treatment filter cartridge regeneration; most solve the problem of filter cartridge clogging by contaminants by simply replacing the cartridge. In areas with good water quality, the filter cartridge has a lower load and a relatively longer lifespan. However, in areas with poor water quality, the filter cartridge has a higher load, a relatively shorter lifespan, and requires more frequent replacements, which is detrimental to improving the user experience and reducing operating costs.

[0078] Furthermore, existing water purifiers typically use a fixed-time filter replacement system. For example, if the filter's lifespan is set at three months, the system will remind the user to replace it after three months. However, water quality is affected by seasonal and regional variations, and filter lifespans can differ. For instance, some water purifier filters are prone to clogging and prematurely expire in areas with poor water quality, leading to untimely replacements and compromising the user's drinking water experience. Conversely, filters in areas with better water quality are less prone to clogging and have a longer lifespan. In such cases, continuing to replace the filter at the originally set lifespan would result in underutilization of the filter and wasted resources.

[0079] Therefore, in order to solve the problems of frequent filter replacement, poor user experience, and high operating costs in existing water purification devices, this invention provides a water purification device and filter cleaning system and method that can regenerate filter elements, which can extend the service life of pre-treatment filter elements, reduce the frequency of filter element replacement, improve user experience, and reduce user operating costs.

[0080] The following is combined with Figures 1 to 9 The following describes embodiments of the present invention.

[0081] According to embodiments of the present invention, in one aspect, the present invention provides a water purification device and a filter element cleaning system and method.

[0082] In a first aspect, the present invention provides a filter cartridge cleaning system for a water purification device, the filter cartridge cleaning system comprising a pretreatment filter cartridge 10, a detection device 20, a cleaning device 30, and a control module.

[0083] Specifically, such as Figure 1 As shown, the detection device 20 is provided corresponding to the pretreatment filter element 10 and is used to detect the clogging information of the pretreatment filter element 10; the cleaning device 30 is used to clean the pretreatment filter element 10, and the cleaning device 30 includes a cleaning pipe 31 arranged in parallel with the water inlet pipe 11 of the pretreatment filter element 10 and a chemical cleaning component arranged on the cleaning pipe 31; the control module is adapted to control the operation of the cleaning device 30 according to the clogging information of the pretreatment filter element 10 detected by the detection device 20.

[0084] In the above embodiment, the added cleaning pipeline 31 and chemical cleaning component, along with the detection device 20 corresponding to the pretreatment filter element 10, detect the clogging information of the pretreatment filter element 10. When it is determined that the pretreatment filter element 10 is severely clogged, the chemical cleaning component can be activated to chemically clean the pretreatment filter element 10, thereby removing contaminants attached to the filter element through chemical treatment. This enables filter element regeneration, effectively extending the service life of the pretreatment filter element 10, reducing the frequency of filter element replacement, improving user experience, and reducing user operating costs. This effectively solves the problems of short filter element life and frequent filter element replacement in existing water purification devices, which result in poor user experience and increased operating costs.

[0085] In some embodiments, the chemical cleaning assembly includes a cleaning agent module 32 and a first switching element 33.

[0086] Specifically, the cleaning agent module 32 has a storage cavity for storing chemical cleaning agent 322; the first switch 33 is disposed on the cleaning pipeline 31 and is located upstream of the cleaning agent module 32; when the first switch 33 is turned on, the raw water can pass through the cleaning agent module 32 and dissolve the chemical cleaning agent 322 in the storage cavity. The dissolved chemical cleaning agent 322 flows into the pretreatment filter element 10 with the water flow and reacts with the deposits on the pretreatment filter element 10.

[0087] In the above embodiment, the cleaning agent module 32 is used to store chemical cleaning agent 322. The first switch 33 can control whether the cleaning agent module 32 releases the cleaning agent. In the normal water production mode, the first switch 33 is closed, and the chemical cleaning agent 322 in the cleaning agent storage structure will not enter the pretreatment filter cartridge 10. When the filter cartridge needs to be cleaned, that is, when the filter cartridge cleaning and regeneration mode is started, the first switch 33 is controlled to open, so that the raw water enters the cleaning agent module 32 through the first switch 33. The cleaning agent module 32 releases the chemical cleaning agent 322. The chemical cleaning agent 322 is soluble in water and can enter the pretreatment filter cartridge 10 with the water flow. The chemical cleaning agent 322 solution that enters the pretreatment filter cartridge 10 can react with the pollutants attached to the pretreatment filter cartridge 10 and undergo a chemical reaction, so that the pollutants are desorbed from the pretreatment filter cartridge 10, thereby achieving the purpose of cleaning the pretreatment filter cartridge 10.

[0088] Optionally, in this embodiment, the first switching element 33 is a solenoid valve.

[0089] In some more specific embodiments, such as Figure 1 , Figure 4 , Figure 5As shown, the cleaning agent module 32 includes a membrane housing 321 and a chemical cleaning agent 322 disposed within the membrane housing 321. The chemical cleaning agent 322 is water-soluble, and dissolves in the water after the raw water enters the cleaning agent module 32. The chemical cleaning agent 322 may be composed of one or more cleaning agents.

[0090] For example, such as Figure 4 As shown, chemical cleaning agent 322 can be one type. Or, as... Figure 1 , Figure 4 , Figure 5 As shown, there are two types of chemical cleaning agents 322. Specifically, chemical cleaning agent 322 includes a first cleaning agent 3221 and a second cleaning agent 3222. The two cleaning agents are arranged vertically inside the membrane housing 321. Alternatively, in other alternative embodiments, the two cleaning agents can also be arranged sequentially along the water flow direction.

[0091] Optionally, chemical cleaning agent 322 is generally an acidic or alkaline cleaning agent. Acidic cleaning agents include citric acid, phosphoric acid, oxalic acid, nitric acid, and phosphoric acid, while alkaline cleaning agents include sodium bicarbonate, sodium carbonate, sodium hydroxide, and potassium hydroxide.

[0092] Optionally, chemical cleaning agent 322 may be in solid or liquid form.

[0093] Preferably, in this embodiment, the chemical cleaning agent 322 is solid. Optionally, the chemical cleaning agent 322 has a porous structure similar to a filter element. The porous chemical cleaning agent 322 allows water to flow through. When the first switch 33 is opened, water can flush and dissolve part of the chemical cleaning agent 322 as it flows through it, thereby adding the chemical cleaning agent 322 to the pretreatment filter element 10. At the same time, the chemical cleaning agent 322 can be used multiple times.

[0094] In some preferred embodiments, the cleaning agent module 32 is detachably mounted on the cleaning pipeline 31, facilitating periodic replacement of the cleaning agent module 32.

[0095] Specifically, the cleaning agent module 32 includes an inlet and an outlet water interface disposed on opposite sides of the membrane housing 321, and the cleaning pipeline 31 includes a first section of pipeline and a second section of pipeline. The outlet of the first section of pipeline is detachably connected to the inlet water interface, and the inlet of the second section of pipeline is detachably connected to the outlet water interface, thereby realizing the connection between the cleaning agent module 32 and the cleaning pipeline 31.

[0096] Optionally, the cleaning agent module 32 and the cleaning pipeline 31 are connected by threads, which not only realizes the detachable connection between the cleaning agent module 32 and the cleaning pipeline 31, but also effectively ensures the sealing of the connection point and avoids water leakage.

[0097] In this embodiment, the cleaning agent module 32 is controlled by the first switch 33, which can be connected to the membrane housing 321 and the cleaning pipeline 31 via a quick interface structure.

[0098] In some embodiments, such as Figure 3 As shown, the cleaning device 30 also includes a check valve structure 34, which is disposed on the cleaning pipeline 31 and located between the cleaning agent module 32 and the pretreatment filter element 10. The check valve structure 34 is configured to restrict the flow of water from the cleaning agent module 32 to the pretreatment filter element 10 in one direction.

[0099] In the above embodiment, the anti-reverse structure 34 ensures that the cleaning water can flow normally into the pretreatment filter element 10, while effectively preventing the water in the pretreatment filter element 10 from flowing back into the cleaning agent module 32 or the first switch element 33.

[0100] Optionally, the check valve 34 is a non-return valve or a one-way valve installed on the cleaning pipeline 31. Specifically, the check valve 34 is installed on the second section of the cleaning pipeline 31.

[0101] In some alternative implementations, such as Figure 2 As shown, a fifth switch 35 is provided on the cleaning pipeline 31. The fifth switch 35 is used to control the flow of water between the cleaning agent module 32 and the pretreatment filter element 10, preventing water in the pretreatment filter element 10 from flowing back into the cleaning agent module 32 during the cleaning regeneration mode or water production mode. It can also effectively prevent residual water in the cleaning device 30 from flowing into the pretreatment filter element 10 during the water production mode, thus preventing water pollution.

[0102] In some embodiments, the detection device 20 includes a flow detection unit, which is disposed at the purified water outlet end of the pretreatment filter element 10. The flow detection unit is used to detect the water production flow of the pretreatment filter element 10 in real time. The control module is adapted to determine whether to activate the cleaning and regeneration mode of the pretreatment filter element 10 based on the water production flow information detected by the flow detection unit.

[0103] In the above embodiment, the flow rate of the pretreatment filter 10 is detected by the flow detection device 20. When it is determined that the flow rate of the pretreatment filter 10 is less than the preset flow rate, the cleaning and regeneration mode of the pretreatment filter 10 is activated. The judgment method is simple, accurate and efficient.

[0104] Of course, in other alternative implementations, the detection device 20 may also use an image acquisition unit to detect the clogging information of the pretreatment filter 10. This embodiment does not limit the specific structure of the detection device 20.

[0105] This embodiment provides a filter cleaning system for a water purification device that determines whether to start the cleaning and regeneration process based on the water production flow rate of the pretreatment filter cartridge 10.

[0106] In some embodiments, the pretreatment filter cartridge 10 has a clean water outlet, and the filter cartridge cleaning system further includes a clean water pipeline 12 and a second switch 121.

[0107] Specifically, the water purification pipeline 12 is connected to the water purification outlet, and the flow detection unit is installed on the water purification pipeline 12; the second switch 121 is installed on the water purification pipeline 12 and is used to control the on / off state of the water purification pipeline 12.

[0108] In the above embodiment, the second switch 121 can control the opening and closing of the water circuit of the water purification pipeline 12, which not only enables the connection between the pretreatment filter element 10 and the next stage filter element, namely the reverse osmosis membrane filter element 50, but also facilitates the settling process of the pretreatment filter element 10, thereby improving the cleaning effect of the pretreatment filter element 10.

[0109] Optionally, the second switch 121 is located downstream of the flow detection unit to avoid affecting the flow detection unit's detection.

[0110] Optionally, the flow detection unit is a flow meter installed on the purified water pipeline 12. The second switch 121 is a solenoid valve and is electrically connected to the control module.

[0111] In some embodiments, the water purification device includes a primary filter element, a reverse osmosis membrane filter element 50, a pressure stabilizing pump 40, and a post-filter element 60. The primary filter element, the reverse osmosis membrane filter element 50, and the post-filter element 60 are arranged sequentially along the water flow direction to form a composite filter element.

[0112] Specifically, the pretreatment filter element 10 is a primary filter element. The inlet end of the purified water pipeline 12 is connected to the purified water outlet of the pretreatment filter element 10, and the outlet end is connected to the inlet of the reverse osmosis membrane filter element 50. The pressure stabilizing pump 40 is installed on the purified water pipeline 12 and is used to adjust the water pressure inside the reverse osmosis membrane filter element 50. The inlet of the post-filter element 60 is connected to the purified water outlet of the reverse osmosis membrane filter element 50, and the pure water obtained through the post-filter element 60 is discharged through the pure water outlet of the post-filter element 60.

[0113] In the above embodiments, the pressure stabilizing pump 40 can effectively ensure the water pressure inside the reverse osmosis membrane filter element 50, thereby improving the water treatment effect of the reverse osmosis membrane filter element 50. The post-filter element 60 can effectively improve the taste of the purified water.

[0114] It should be noted that in this embodiment, the reverse osmosis membrane filter element 50, also known as the RO membrane filter element, can also be cleaned using the same cleaning method as the primary filter element.

[0115] In this embodiment, the reverse osmosis membrane filter element 50 also has a wastewater outlet and a clean water outlet. The wastewater outlet end is provided with a sixth switch element 51, which is a wastewater solenoid valve. The clean water outlet is connected to the post-filter element 60.

[0116] In some embodiments, the filter element cleaning system further includes a wastewater discharge pipe 13 and a third switch 131. The wastewater discharge pipe 13 is connected to the clean wastewater outlet for discharging the cleaned wastewater. The third switch 131 is disposed on the wastewater discharge pipe 13 for controlling whether to discharge the clean wastewater from the pretreated filter element 10.

[0117] In the above embodiment, the clean wastewater in the pretreatment filter element 10 can be automatically discharged through the wastewater discharge pipe 13 and the third switch 131.

[0118] Optionally, the third switching element 131 is a solenoid valve.

[0119] In some embodiments, the inlet of the water inlet pipe 11 is adapted to be connected to an external water source, and a fourth switch 111 is provided on the water inlet pipe 11. The cleaning pipe 31 is arranged in parallel with the fourth switch 111.

[0120] In the above embodiment, the water inlet of the pretreatment filter element 10 is controlled by the fourth switch element 111. In addition, the cleaning pipeline 31 is arranged in parallel with the fourth switch element 111 so that the water inlet of the cleaning pipeline 31 and the water inlet pipeline 11 do not affect each other.

[0121] Optionally, the fourth switching element 111 is a solenoid valve.

[0122] According to an embodiment of the present invention, in another aspect, a filter cartridge cleaning method is provided, applicable to the filter cartridge cleaning system of the water purification device of any of the above embodiments, combined with... Figures 1 to 3 as well as Figure 6 As shown, the filter element cleaning method includes the following steps:

[0123] Step S101: Obtain clogging information of pretreatment filter 10;

[0124] Step S102: When it is determined that the degree of clogging of the pretreatment filter element 10 is greater than the set clogging threshold, the cleaning and regeneration mode of the pretreatment filter element 10 is activated.

[0125] Step S103: Start the cleaning device 30 to perform chemical cleaning on the pretreatment filter element 10.

[0126] In this embodiment, when it is determined that the pretreatment filter cartridge 10 is severely clogged, the chemical cleaning component can be activated to chemically clean the pretreatment filter cartridge 10. This removes contaminants attached to the filter cartridge through chemical treatment, thereby regenerating the filter cartridge, effectively extending the service life of the pretreatment filter cartridge 10, reducing the frequency of filter cartridge replacement, improving user experience, and reducing user operating costs. This effectively solves the problems of short filter cartridge life and frequent cartridge replacement in existing water purification devices, which result in poor user experience and increased operating costs.

[0127] In some embodiments, combined with Figures 1 to 3 as well as Figure 7 As shown, when the degree of clogging of the pretreatment filter element 10 is determined to be greater than the set clogging threshold, the cleaning and regeneration mode of the pretreatment filter element 10 is activated, specifically including the following steps:

[0128] Step S201: Obtain the water production flow rate information of the pretreatment filter cartridge 10 in real time;

[0129] Step S202: When it is determined that the water flow rate Q of the pretreatment filter element 10 is less than the preset flow rate Q0, the cleaning and regeneration mode of the pretreatment filter element 10 is turned on.

[0130] In the above embodiment, by setting a flow detection unit at the water production end after the pretreatment filter element 10, the water production flow of the pretreatment filter element 10 is detected by the flow detection unit, thereby determining whether to start the cleaning and regeneration program of the pretreatment filter element 10, effectively extending the service life of the pretreatment filter element 10, reducing the frequency of filter replacement, improving user experience, and reducing user operating costs.

[0131] In some embodiments, combined with Figures 1 to 3 as well as Figure 8 As shown, the control cleaning device 30 is activated to perform chemical cleaning on the pretreatment filter element 10, specifically including the following steps:

[0132] Step S301: Control the second switch 121 and the fourth switch 111 to close, and the first switch 33 and the third switch 131 to open. When the preset cleaning time is reached, enter the settling program.

[0133] Step S302: Control the first switch 33 and the third switch 131 to close. When the preset settling time is reached, the rinsing procedure is started.

[0134] Step S303: Control the first switch 33 and the second switch 121 to remain closed, and the third switch 131 and the fourth switch 111 to open, so that the wastewater in the pretreatment filter element 10 is discharged through the wastewater discharge pipe 13;

[0135] Step S304: When the preset rinsing time is reached, control the third switch 131 to close, ending the filter element cleaning and regeneration mode.

[0136] In step S301 above, by controlling the second switch 121 and the fourth switch 111 to close and the first switch 33 and the third switch 131 to open, a preset cleaning time is run, thereby effectively ensuring that sufficient cleaning agent enters the filter element to be treated.

[0137] In step S302 above, by controlling the first switch 33 and the third switch 131 to be closed, the water flow and cleaning agent solution in the filter element to be treated are in a static state, and the static setting time is set so that the cleaning agent solution in the filter element to be treated can fully soak the deposits on the filter element to be treated. The cleaning agent solution and the deposits on the element have enough reaction time, making it easier to detach, thereby effectively improving the cleaning effect of the filter element to be treated.

[0138] In step S303 above, by controlling the first switch 33 and the second switch 121 to remain closed, and the third switch 131 and the fourth switch 111 to be opened, the wastewater in the pretreatment filter element 10 can be discharged through the wastewater discharge pipe 13, thereby achieving the purpose of draining dirty water and cleaning the pipe and the filter element to be treated.

[0139] In step S304 above, after rinsing is completed, the third switch 131 is closed, that is, the wastewater valve of the filter element to be treated is closed, and the filter element cleaning and regeneration mode ends.

[0140] In some embodiments, combined with Figures 1 to 3 as well as Figure 9 As shown, the cleaning method also includes the following steps:

[0141] Step S401: Calculate the difference ΔQ between the pre-treatment filter cartridge 10's permeate flow rate Q and the preset flow rate Q0;

[0142] Step S402: Based on the difference △Q, determine the preset cleaning time and / or preset settling time.

[0143] In the above embodiments, the preset cleaning time and / or preset settling time are determined by the difference ΔQ between the pre-treatment filter cartridge 10's water flow rate Q and the preset flow rate Q0. This allows for control over the amount of chemical agent added and the settling time, resulting in better cleaning of the filter cartridge and avoiding resource waste.

[0144] For example, when it is determined that △Q is greater than the first preset difference △Q1, the preset cleaning time is controlled to be the first duration T1 and the preset resting time is controlled to be the second duration T2; when it is determined that △Q is less than or equal to the first preset difference △Q1 and greater than the second preset difference △Q2, the preset cleaning time is controlled to be the third duration T3 and the preset resting time is controlled to be the fourth duration T4; when it is determined that △Q is less than or equal to the second preset difference △Q2, the preset cleaning time is controlled to be the fifth duration T5 and the preset resting time is controlled to be the sixth duration T6; wherein, △Q1>△Q2, T1>T3>T5, T2>T4>T6.

[0145] The working principle and cleaning process of the filter cleaning system provided in this embodiment are as follows:

[0146] The first switch 33 is mounted on the cleaning pipeline 31 and is located upstream of the cleaning agent module 32. The fourth switch 111 is a water inlet solenoid valve located at the water inlet of the pretreatment filter element 10, used to control the water inlet and rinsing process. The cleaning agent module 32 is connected in parallel with the fourth switch 111, and the fourth switch 111 is activated when the regeneration cleaning process is running. The pretreatment filter element 10 has two outlets, one for clean water and one for wastewater, used to discharge the wastewater after rinsing and the filtered clean water, respectively. The wastewater outlet is connected to a third switch 131, which is a wastewater solenoid valve. The wastewater solenoid valve is used to control the opening and closing of the wastewater discharge pipeline 13 in conjunction with the rinsing process, thereby discharging the wastewater from cleaning the filter element to be treated. The second switch 121 is mounted on the clean water pipeline 12 of the pretreatment filter element 10. The flow detection unit is located at the purified water end of the pretreatment filter element 10 and detects the production water flow of the pretreatment filter element 10 in real time to determine whether to start the cleaning and regeneration program of the pretreatment filter element 10.

[0147] When the power is connected and the water production mode is activated, the second switch 121 and the fourth switch 111 are open, the second switch 121 is closed, and the sixth switch 51 is closed. Raw water passes through the pretreatment filter 10, the reverse osmosis membrane filter 50, and the post-filter 60 to produce pure water, which is discharged from the pure water outlet. When the flow detection unit detects that the production water flow rate Q of the pretreatment filter 10 is less than the preset flow rate Q0, the pretreatment filter 10 cleaning and regeneration mode is activated.

[0148] First, the second switch 121 and the fourth switch 111 are closed, while the first switch 33 and the third switch 131 are opened. Raw water enters the cleaning agent module 32 via the first switch 33. The cleaning agent module 32 releases chemical cleaning agent 322, which reacts with contaminants on the pretreatment filter element 10, causing them to desorb. After a preset cleaning time, the first switch 33 and the third switch 131 are closed, initiating a settling process. After the preset settling time is reached, the fourth switch 111 and the third switch 131 are opened, and wastewater from the pretreatment filter element 10 is discharged via the third switch 131. After the preset rinsing time is reached, the third switch 131 is closed, and the entire machine returns to normal standby mode.

[0149] According to an embodiment of the present invention, in another aspect, a water purification device is provided, which includes the filter cleaning system of any of the above embodiments.

[0150] Optionally, the water purification device is a water purifier.

[0151] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A filter cartridge cleaning method, applicable to the filter cartridge cleaning system of a water purification device, characterized in that, The filter cleaning system includes: Pretreatment filter element (10); The detection device (20) is provided corresponding to the pretreatment filter element (10) and is used to detect the clogging information of the pretreatment filter element (10); the detection device (20) includes: a flow detection unit, which is provided at the clean water outlet end of the pretreatment filter element (10) and is used to detect the water production flow of the pretreatment filter element (10) in real time; A cleaning device (30) is used to clean the pretreatment filter element (10). The cleaning device (30) includes a cleaning pipeline (31) connected in parallel with the water inlet pipeline (11) of the pretreatment filter element (10) and a chemical cleaning component installed on the cleaning pipeline (31). The control module is adapted to determine whether to activate the cleaning and regeneration mode of the pretreatment filter cartridge (10) based on the product water flow information detected by the flow detection unit. The filter element cleaning method includes: Obtain clogging information of the pretreatment filter element (10); When it is determined that the degree of clogging of the pretreatment filter element (10) is greater than the set clogging degree threshold, the cleaning and regeneration mode of the pretreatment filter element (10) is activated. The control cleaning device (30) is started to perform chemical cleaning on the pre-treatment filter element (10); When it is determined that the degree of clogging of the pretreatment filter element (10) is greater than the set clogging threshold, the cleaning and regeneration mode of the pretreatment filter element (10) is activated, which specifically includes the following steps: Real-time acquisition of the water flow rate information of the pretreatment filter element (10); When it is determined that the water flow rate Q of the pretreatment filter element (10) is less than the preset flow rate Q0, the cleaning and regeneration mode of the pretreatment filter element (10) is activated.

2. The filter element cleaning method according to claim 1, characterized in that, The chemical cleaning assembly includes: The cleaning agent module (32) has a storage cavity inside for storing chemical cleaning agents (322); A first switch (33) is disposed on the cleaning pipeline (31), and the first switch (33) is located upstream of the cleaning agent module (32); When the first switch (33) is turned on, the raw water can pass through the cleaning agent module (32) and dissolve the chemical cleaning agent (322) in the storage chamber. The dissolved chemical cleaning agent (322) flows into the pretreatment filter (10) with the water flow and reacts with the deposits on the pretreatment filter (10).

3. The filter element cleaning method according to claim 2, characterized in that, The cleaning device (30) further includes: A check valve structure (34) is provided on the cleaning pipeline (31) and located between the cleaning agent module (32) and the pretreatment filter element (10); The anti-reverse structure (34) is configured to restrict the flow of water unidirectionally from the cleaning agent module (32) to the pretreatment filter element (10).

4. The filter element cleaning method according to claim 3, characterized in that, The pretreatment filter element (10) has a clean water outlet, and the filter element cleaning system further includes: A water purification pipeline (12) is connected to the water purification outlet, and the flow detection unit is installed on the water purification pipeline (12); The second switch (121) is disposed on the water purification pipeline (12) and is used to control the on / off state of the water purification pipeline (12).

5. The filter element cleaning method according to claim 4, characterized in that, The water purification device includes: Primary filter element, the pretreatment filter element (10) is the primary filter element; The reverse osmosis membrane filter element (50) has its inlet end connected to the water outlet of the pretreatment filter element (10) and its outlet end connected to the water inlet of the reverse osmosis membrane filter element (50). A pressure stabilizing pump (40) is installed on the purified water pipeline (12), and the pressure stabilizing pump (40) is used to adjust the water pressure inside the reverse osmosis membrane filter element (50); The inlet of the post-filter (60) is connected to the purified water outlet of the reverse osmosis membrane filter (50), and the pure water obtained through the post-filter (60) is discharged through the pure water outlet of the post-filter (60).

6. The filter element cleaning method according to any one of claims 1 to 3, characterized in that, The pretreatment filter element (10) has a clean wastewater outlet, and the filter element cleaning system further includes: Wastewater discharge pipe (13) is connected to the clean wastewater outlet for discharging the wastewater after cleaning; The third switch (131) is installed on the wastewater discharge pipeline (13) to control whether the clean wastewater of the pretreatment filter element (10) is discharged.

7. The filter element cleaning method according to any one of claims 1 to 3, characterized in that, The inlet of the water inlet pipe (11) is suitable for connection with an external water source. A fourth switch (111) is provided on the water inlet pipe (11). The cleaning pipe (31) is connected in parallel with the fourth switch (111).

8. The filter element cleaning method according to any one of claims 1 to 3, characterized in that, The control cleaning device (30) is activated to perform chemical cleaning on the pretreatment filter element (10), specifically including the following steps: Control the second switch (121) and the fourth switch (111) to close, and the first switch (33) and the third switch (131) to open. When the preset cleaning time is reached, the static program is entered. The first switch (33) and the third switch (131) are closed, and the rinsing procedure is started when the preset settling time is reached; The first switch (33) and the second switch (121) are kept closed, while the third switch (131) and the fourth switch (111) are opened, so that the wastewater in the pretreatment filter element (10) is discharged through the wastewater discharge pipe (13); When the preset rinsing time is reached, the third switch (131) is closed to end the filter element cleaning and regeneration mode.

9. The filter element cleaning method according to claim 8, characterized in that, The cleaning method further includes the following steps: Calculate the difference △Q between the water flow rate Q of the pretreatment filter element (10) and the preset flow rate Q0, and determine the preset cleaning time and / or preset settling time based on the difference △Q.

10. A water purification device, characterized in that, The water purification device cleans the filter element using the filter element cleaning method described in any one of claims 1 to 9.

Images