Water purifier and cleaning method of ultrafiltration filtering mechanism thereof

Abstract

The application relates to a water purifier and a cleaning method of an ultrafiltration filtering mechanism of the water purifier. The cleaning method of the ultrafiltration filtering mechanism of the water purifier comprises the following steps: controlling the water purifier to run in a hydraulic cleaning state to perform a hydraulic cleaning action of the ultrafiltration filtering mechanism; controlling the water purifier to switch to an ultrasonic cleaning state to perform an ultrasonic cleaning action of the ultrafiltration filtering mechanism; and controlling the water purifier to switch to a standing soaking state to perform a standing soaking action of the ultrafiltration filtering mechanism. The water purifier comprises an ultrafiltration filtering mechanism, an ultrasonic cleaning unit and the like. The ultrafiltration filtering mechanism comprises a shell and an ultrafiltration filter core, and the ultrafiltration filter core is accommodated in the shell. The ultrasonic cleaning unit at least partially extends into the shell and is used for emitting ultrasonic waves. The water purifier and the cleaning method of the ultrafiltration filtering mechanism of the water purifier can realize automatic cleaning of the ultrafiltration filtering mechanism of the water purifier, effectively guarantee the safety of drinking water on the basis of prolonging the service life of the ultrafiltration filtering mechanism.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a method for cleaning a water purifier and its ultrafiltration mechanism. Background Technology

[0002] Water purifiers on the market purify tap water through their built-in purification systems. After a period of use, impurities accumulate or adhere to the ultrafiltration mechanism within this system, easily causing filter clogging and reducing purification efficiency. Therefore, the ultrafiltration mechanism needs cleaning. Cleaning the ultrafiltration mechanism typically involves a simple water jet rinse, which is ineffective and requires frequent rinsing, wasting water; alternatively, it may require manual disassembly and cleaning by the user, resulting in a poor user experience. Summary of the Invention

[0003] Therefore, it is necessary to provide a cleaning method for a water purifier and its ultrafiltration mechanism to address the problems of poor cleaning effect and inconvenient operation of the ultrafiltration mechanism in the water purification system.

[0004] A cleaning method for the ultrafiltration mechanism of a water purifier includes the following steps: controlling the water purifier to operate in a hydraulic cleaning state to perform a hydraulic cleaning action on the ultrafiltration mechanism; controlling the water purifier to switch to an ultrasonic cleaning state to perform an ultrasonic cleaning action on the ultrafiltration mechanism; and controlling the water purifier to switch to a static soaking state to perform a static soaking action on the ultrafiltration mechanism.

[0005] The cleaning method for the ultrafiltration mechanism of the water purifier described above involves first using raw water to perform a hydraulic rinse on the ultrafiltration mechanism, followed by ultrasonic cleaning. Ultrasonic waves induce ultrasonic cavitation in the water, and the high-pressure shock waves and high-speed micro-jet generated by the bursting of bubbles desorb the adsorbate from the surface of the ultrafiltration membrane and within the membrane pores. Static soaking allows the adsorbate to completely precipitate out, thus achieving automatic cleaning of the ultrafiltration mechanism in the water purifier. This method extends the lifespan of the ultrafiltration mechanism, is convenient to operate, and effectively ensures the safety of drinking water.

[0006] In one embodiment, the cleaning method includes: the water purifier switching to the ultrasonic cleaning state when the hydraulic cleaning state operation time reaches T1; and the water purifier switching to the static soaking state for operation time T3 when the ultrasonic cleaning state operation time reaches T2.

[0007] In one embodiment, the value of T1 ranges from 1 to 10 minutes.

[0008] In one embodiment, the value of T2 ranges from 1 to 10 minutes.

[0009] In one embodiment, the value of T3 ranges from 10 to 60 minutes.

[0010] In one embodiment, after controlling the water purifier to switch to a static soaking state to perform the static soaking action of the ultrafiltration mechanism, the method further includes the following steps: detecting the water flow rate of the ultrafiltration mechanism; stopping the static soaking action of the ultrafiltration mechanism when the water flow rate of the ultrafiltration mechanism is greater than or equal to a preset value; and cyclically performing the hydraulic cleaning action, the ultrasonic cleaning action, and the static soaking action of the ultrafiltration mechanism when the water flow rate of the ultrafiltration mechanism is less than the preset value.

[0011] In one embodiment, the water purifier cycles through the hydraulic cleaning action, the ultrasonic cleaning action, and the static soaking action 1 to 10 times.

[0012] A water purifier employing the above-described cleaning method includes: an ultrafiltration filtration mechanism, comprising a housing and an ultrafiltration filter element, the ultrafiltration filter element being housed within the housing; an ultrasonic cleaning unit, at least partially extending into the housing and used to emit ultrasonic waves; when the water purifier is in ultrasonic cleaning mode, controlling the ultrasonic cleaning unit to turn on; when the water purifier is in non-ultrasonic cleaning mode, controlling the ultrasonic cleaning unit to turn off.

[0013] The aforementioned water purifier first uses raw water to hydraulically flush the ultrafiltration filtration mechanism, and then performs ultrasonic cleaning on the ultrafiltration filtration mechanism. Ultrasonic waves cause the water to undergo ultrasonic cavitation, and the high-pressure shock waves generated by the bursting of bubbles and the high-speed micro-jet cause the adsorbates on the surface of the ultrafiltration membrane and inside the membrane pores in the ultrafiltration filtration mechanism to desorb. After static soaking, the adsorbates are completely precipitated out, thereby achieving automatic cleaning of the ultrafiltration filtration mechanism in the water purifier. This not only extends the life of the ultrafiltration filtration mechanism, but also makes the operation convenient and effectively ensures the safety of drinking water.

[0014] In one embodiment, at least one of the ultrasonic cleaning units is provided on the top and / or bottom of the housing.

[0015] In one embodiment, at least two ultrasonic cleaning units are provided on the side of the housing, and each ultrasonic cleaning unit is evenly distributed on opposite sides of the housing.

[0016] In one embodiment, the ultrasonic cleaning unit is an ultrasonic transducer, an ultrasonic probe, or an ultrasonic ring.

[0017] In one embodiment, the water purifier further includes an activated carbon filtration mechanism and a reverse osmosis filtration mechanism, wherein the ultrafiltration filtration mechanism is connected to the activated carbon filtration mechanism, and the activated carbon filtration mechanism is connected to the reverse osmosis filtration mechanism.

[0018] In one embodiment, the activated carbon filtration mechanism includes a pre-filter and a post-filter. The outlet of the ultrafiltration mechanism is connected to the inlet of the pre-filter via a first pipeline. The outlet of the pre-filter is connected to the inlet of the reverse osmosis filtration mechanism via a second pipeline. The outlet of the reverse osmosis filtration mechanism is connected to the inlet of the post-filter via a third pipeline. The outlet of the post-filter is a pure water outlet. The wastewater outlet of the ultrafiltration mechanism is provided with a first wastewater pipeline, and the wastewater outlet of the reverse osmosis filtration mechanism is provided with a second wastewater pipeline.

[0019] In one embodiment, the first pipeline is equipped with an inlet valve, the second pipeline is equipped with a pump body, the first wastewater pipeline is equipped with a first wastewater valve, and the second wastewater pipeline is equipped with a second wastewater valve. When the water purifier is in normal water production mode, the inlet valve and the pump body are controlled to open, and the first wastewater valve and the second wastewater valve are closed. When the water purifier is in hydraulic cleaning mode, the first wastewater valve is controlled to open, and the inlet valve, the pump body, and the second wastewater valve are also open. When the water purifier is in ultrasonic cleaning mode or static soaking mode, the first wastewater valve, the inlet valve, the pump body, and the second wastewater valve are controlled to close.

[0020] In one embodiment, the third pipeline is further provided with a check valve, which is used to ensure that liquid can only flow out unidirectionally from the outlet of the reverse osmosis filtration mechanism to the inlet of the post-filter element. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a water purifier in one embodiment.

[0022] Figure 2 This is a schematic diagram of a water purifier in another embodiment.

[0023] Figure 3 This is a schematic diagram of a water purifier in yet another embodiment.

[0024] Figure label:

[0025] 100. Ultrafiltration unit; 101. First pipeline; 101a. Inlet valve; 102. First wastewater pipeline; 102a. First wastewater valve; 110. Outer shell; 200. Ultrasonic cleaning unit; 300. Activated carbon filtration unit; 301. Second pipeline; 301a. Pump body; 302. Pure water outlet; 400. Reverse osmosis filtration unit; 401. Third pipeline; 401a. Check valve; 402. Second wastewater pipeline; 402a. Second wastewater valve. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0028] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two elements or the interaction between two elements, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. When an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element present.

[0030] Please refer to Figure 1A cleaning method for the ultrafiltration mechanism 100 of a water purifier in one embodiment includes the following steps:

[0031] Control the water purifier to operate in the hydraulic cleaning state to perform the hydraulic cleaning action of the ultrafiltration filter unit 100;

[0032] Control the water purifier to switch to ultrasonic cleaning mode to perform ultrasonic cleaning of the ultrafiltration unit 100;

[0033] Control the water purifier to switch to static soaking mode to perform the static soaking action of the ultrafiltration unit 100.

[0034] It should be noted that the ultrafiltration filter 100 can effectively remove impurities such as sediment, suspended solids, rust, colloids, bacteria, and large particles from drinking water. After a period of use in the water purifier, a certain amount of impurities will accumulate or adhere to the ultrafiltration filter 100, which can easily cause filter clogging and reduce the water purification effect. Therefore, the ultrafiltration filter 100 needs to be cleaned.

[0035] The cleaning method for the ultrafiltration filter mechanism 100 of the water purifier described above involves first using raw water to perform a hydraulic rinse on the ultrafiltration filter mechanism 100, and then performing an ultrasonic cleaning. Ultrasonic waves induce ultrasonic cavitation in the water, and the high-pressure shock waves and high-speed micro-jet generated by the bursting of bubbles desorb the adsorbate from the surface of the ultrafiltration membrane and the pores within the membrane. Furthermore, static soaking allows the adsorbate to completely precipitate out, thus achieving automatic cleaning of the ultrafiltration filter mechanism 100 in the water purifier. This method extends the lifespan of the ultrafiltration filter mechanism 100, is convenient to operate, and effectively ensures the safety of drinking water.

[0036] For details, please refer to Figure 1 The cleaning method for the ultrafiltration unit 100 of the water purifier includes the following steps:

[0037] When the water purifier has been running in hydraulic cleaning mode for T1 hours, it will switch to ultrasonic cleaning mode.

[0038] When the water purifier has been running in ultrasonic cleaning mode for T2 hours, it will switch to static soaking mode for T3 hours.

[0039] It should be noted that in this embodiment, the values ​​of T1, T2 and T3 can be equal or unequal, and can be adjusted according to the actual situation.

[0040] In this embodiment, please refer to Figure 1 The value of T1 ranges from 1 to 10 minutes.

[0041] It should be noted that T1 is the operating time of the water purifier in the hydraulic cleaning mode. If the operating time T1 in the hydraulic cleaning mode is too short, impurities in the ultrafiltration filter 100 will not be effectively flushed away; if the operating time T1 in the hydraulic cleaning mode is too long, it will result in high energy consumption and long operating time. By limiting T1 to the optimal range, impurities can be effectively flushed away while saving energy and time.

[0042] In this embodiment, setting T1 to a value of 1 to 10 minutes is sufficient to meet the usage requirements. In other embodiments, the value of T1 can also be set to other numerical ranges.

[0043] In this embodiment, please refer to Figure 1 The value of T2 ranges from 1 to 10 minutes.

[0044] It should be noted that T2 is the operating time of the water purifier in ultrasonic cleaning mode. If the operating time in ultrasonic cleaning mode is too short, the adsorbate in the ultrafiltration unit 100 will not be completely desorbed; if the operating time in ultrasonic cleaning mode is too long, it will result in high energy consumption and long running time. By limiting T2 to the optimal range, complete desorption of the adsorbate can be achieved, while saving energy and time.

[0045] In this embodiment, setting T2 to a value of 1 to 10 minutes is sufficient to meet the usage requirements. In other embodiments, the value of T2 can also be set to other numerical ranges.

[0046] In this embodiment, please refer to Figure 1 The value of T3 ranges from 10 to 60 minutes.

[0047] It should be noted that T3 refers to the operating time of the water purifier during the static soaking state. If the operating time during the static soaking state is too short, the adsorbate in the ultrafiltration filter 100 cannot be completely extracted; if the operating time during the static soaking state is too long, the ultrafiltration filter 100 will be over-soaked. By limiting T3 to the optimal range, the adsorbate can be completely extracted without affecting the normal operation of the ultrafiltration filter 100.

[0048] In this embodiment, setting T3 to a value of 10–60 minutes is sufficient to meet the usage requirements. In other embodiments, the value of T3 can be set to other numerical ranges.

[0049] Please refer to Figure 1 After controlling the water purifier to switch to the static soaking state to perform the static soaking action of the ultrafiltration unit 100, the following steps are also included:

[0050] Detect the outflow rate of the ultrafiltration unit 100;

[0051] When the outflow rate of the ultrafiltration unit 100 is greater than or equal to the preset value, the static soaking action of the ultrafiltration unit 100 is stopped.

[0052] When the outflow rate of the ultrafiltration unit 100 is less than the preset value, the water cleaning action, ultrasonic cleaning action and static soaking action of the ultrafiltration unit 100 are executed in a cycle.

[0053] Understandably, the flow rate of the ultrafiltration unit 100 can be used to determine whether the cleaning of the ultrafiltration unit 100 has achieved the preset effect. For example, when the flow rate of the ultrafiltration unit 100 is greater than or equal to the preset value, it means that the cleaning of the ultrafiltration unit 100 has achieved the preset effect, and the static soaking action can be stopped; when the flow rate of the ultrafiltration unit 100 is less than the preset value, it means that the cleaning of the ultrafiltration unit 100 has not achieved the preset effect, and the hydraulic cleaning action, ultrasonic cleaning action, and static soaking action need to be continued.

[0054] For details, please refer to Figure 1 The water purifier performs the hydraulic cleaning, ultrasonic cleaning, and soaking actions 1 to 10 times. Thus, the water purifier can cycle through these actions once or at least twice, stopping when the water flow rate from the ultrafiltration unit 100 is greater than or equal to a preset value.

[0055] Please refer to Figure 1 In one embodiment, the water purifier using the above cleaning method includes an ultrafiltration filtration mechanism 100 and an ultrasonic cleaning unit 200. The ultrafiltration filtration mechanism 100 includes a housing 110 and an ultrafiltration filter element, the ultrafiltration filter element being housed within the housing 110. The ultrasonic cleaning unit 200 extends at least partially into the housing 110 and is used to emit ultrasonic waves.

[0056] Specifically, when the water purifier is in ultrasonic cleaning mode, the ultrasonic cleaning unit 200 is turned on; when the water purifier is in non-ultrasonic cleaning mode, the ultrasonic cleaning unit 200 is turned off.

[0057] It should be noted that the ultrasonic cleaning unit 200 must extend at least partially into the housing 110 in order for the ultrasonic waves emitted by the ultrasonic cleaning unit 200 to cause ultrasonic cavitation effect in the water inside the housing 110, thereby facilitating the ultrasonic cleaning of the ultrafiltration filter element inside the housing 110.

[0058] The aforementioned water purifier first uses raw water to hydraulically flush the ultrafiltration filter mechanism 100, and then performs ultrasonic cleaning on the ultrafiltration filter mechanism 100. Ultrasonic waves cause the water to undergo ultrasonic cavitation, and the high-pressure shock waves and high-speed micro-jet generated by the bursting of bubbles desorb the adsorbate on the surface of the ultrafiltration membrane and inside the membrane pores in the ultrafiltration filter mechanism 100. After static soaking, the adsorbate is completely precipitated out, thereby achieving automatic cleaning of the ultrafiltration filter mechanism 100 in the water purifier. This not only extends the life of the ultrafiltration filter mechanism 100, but also makes the operation convenient and effectively ensures the safety of drinking water.

[0059] In this embodiment, the outer shell 110 can be cylindrical, prismatic, or other shapes; the specific shape of the outer shell 110 is not limited here. The outer shell 110 and the ultrasonic cleaning unit 200 are separate structures, and the two are detachably connected. In other embodiments, the outer shell 110 and the ultrasonic cleaning unit 200 can also be an integrated structure.

[0060] In this embodiment, the number of ultrafiltration cartridges is not limited to one; that is, at least two ultrafiltration cartridges can be disposed within the housing 110. Optionally, the ultrafiltration cartridge is an ultrafiltration membrane, and the material of the ultrafiltration membrane can be polypropylene.

[0061] In one specific embodiment, please refer to Figure 1 and Figure 2 At least one ultrasonic cleaning unit 200 is provided on the top and / or bottom of the housing 110.

[0062] It is understood that by providing at least one ultrasonic cleaning unit 200 at the top and / or bottom of the housing 110, the ultrasonic cleaning unit 200 can emit ultrasonic waves to cause ultrasonic cavitation effect in the water without affecting the normal use of the ultrafiltration filter element.

[0063] In this embodiment, all ultrasonic cleaning units 200 are of the same type and size, which facilitates mass production and installation, and also helps to create a uniform sound field within the housing 110.

[0064] In another embodiment, please refer to Figure 3 The outer casing 110 has at least two ultrasonic cleaning units 200 on its side, and each ultrasonic cleaning unit 200 is evenly distributed on opposite sides of the outer casing 110.

[0065] It is understandable that by distributing each ultrasonic cleaning unit 200 evenly on opposite sides of the housing 110, it is more conducive to creating a uniform sound field within the housing 110 without affecting the normal use of the ultrafiltration filter element.

[0066] In this embodiment, all ultrasonic cleaning units 200 are of the same type and size, which facilitates mass production and installation, and also helps to create a uniform sound field within the housing 110.

[0067] In this embodiment, please refer to Figure 1 The ultrasonic cleaning unit 200 is an ultrasonic transducer, ultrasonic probe, or ultrasonic ring.

[0068] Specifically, the housing of the ultrasonic transducer, ultrasonic probe, or ultrasonic ring is made of ceramic material, encapsulated in food-grade stainless steel, and then assembled with the outer shell 110.

[0069] Please refer to Figure 1 The water purifier also includes an activated carbon filter mechanism 300 and a reverse osmosis filter mechanism 400, an ultrafiltration filter mechanism 100 connected to the activated carbon filter mechanism 300, and an activated carbon filter mechanism 300 connected to the reverse osmosis filter mechanism 400.

[0070] It should be noted that the ultrafiltration unit 100 is used to remove large particulate impurities such as silt, rust, and suspended matter from the raw water; the activated carbon filtration unit 300 is used to remove organic matter, some heavy metals, residual chlorine, discoloration, and odor from the raw water; and the reverse osmosis filtration unit 400 is used to filter out all impurity molecules except water molecules.

[0071] Optionally, the filter element of the activated carbon filter unit 300 may contain at least one of coal-based activated carbon, coconut shell activated carbon, or other types of activated carbon particles, and the reverse osmosis filter unit 400 may be a high-precision RO membrane.

[0072] Further, please refer to Figure 1 The activated carbon filtration mechanism 300 includes a pre-filter and a post-filter. The outlet of the ultrafiltration mechanism 100 is connected to the inlet of the pre-filter through a first pipe 101. The outlet of the pre-filter is connected to the inlet of the reverse osmosis filtration mechanism 400 through a second pipe 301. The outlet of the reverse osmosis filtration mechanism 400 is connected to the inlet of the post-filter through a third pipe 401. The outlet of the post-filter is a pure water outlet 302. The wastewater outlet of the ultrafiltration mechanism 100 is provided with a first wastewater pipe 102, and the wastewater outlet of the reverse osmosis filtration mechanism 400 is provided with a second wastewater pipe 402.

[0073] It should be noted that when the water purifier is in normal water production mode, the raw water flows sequentially through the ultrafiltration filter 100, the pre-filter, the reverse osmosis filter 400, and the post-filter before being filtered and output as pure water from the pure water outlet 302. When the water purifier is in hydraulic cleaning mode, the raw water flows through the ultrafiltration filter 100 and flushes it, and is output as wastewater from the first wastewater pipe 102. When the water purifier is in ultrasonic cleaning mode or static soaking mode, the ultrafiltration filter 100 is directly ultrasonically cleaned or statically soaked.

[0074] In this embodiment, both the pre-filter and the post-filter are made of activated carbon. The activated carbon can be at least one of coal-based activated carbon, coconut shell activated carbon, or other types of activated carbon particles. Here, the type of activated carbon is not limited.

[0075] In this embodiment, the outer casing 110 has independent first and second cavities, which are not connected to each other. The pre-filter is housed in the first cavity, and the post-filter is housed in the second cavity, ensuring that the pre-filter and post-filter do not interfere with each other. The first and second cavities can be arranged side-by-side or front-to-back. The specific arrangement of the first and second cavities is not limited here.

[0076] Please refer to Figure 1 The first pipeline 101 is equipped with an inlet valve 101a, the second pipeline 301 is equipped with a pump body 301a, the first wastewater pipeline 102 is equipped with a first wastewater valve 102a, and the second wastewater pipeline 402 is equipped with a second wastewater valve 402a.

[0077] When the water purifier is in normal water production mode, the control inlet valve 101a and pump body 301a are opened, and the first wastewater valve 102a and the second wastewater valve 402a are closed.

[0078] When the water purifier is in hydraulic cleaning mode, the first wastewater valve 102a is opened, and the inlet valve 101a, pump body 301a and second wastewater valve 402a are also opened.

[0079] When the water purifier is in ultrasonic cleaning mode or static soaking mode, the first wastewater valve 102a, the inlet valve 101a, the pump body 301a and the second wastewater valve 402a are closed.

[0080] It should be noted that the pump body 301a provides power for the flow of liquid in the second pipeline 301, the inlet valve 101a controls the opening and closing of the first pipeline 101, the first wastewater valve 102a controls the opening and closing of the first wastewater pipeline 102, and the second wastewater valve 402a controls the opening and closing of the second wastewater pipeline 402. When the water purifier is operating in different states, the pump body 301a, the inlet valve 101a, the first wastewater valve 102a, and the second wastewater valve 402a can be selectively opened and closed.

[0081] For example, when the water purifier is in normal water production mode, the inlet valve 101a and pump body 301a are opened and the first wastewater valve 102a and second wastewater valve 402a are closed. At this time, the first pipeline 101 and the second pipeline 301 are open and the first wastewater pipeline 102 and the second wastewater pipeline 402 are closed. The raw water flows through the ultrafiltration filter mechanism 100, the pre-filter, the reverse osmosis filter mechanism 400 and the post-filter in sequence and is then filtered and pure water is output from the pure water outlet 302.

[0082] When the water purifier is in hydraulic cleaning mode, the first wastewater valve 102a is opened, and the inlet valve 101a, pump body 301a and second wastewater valve 402a are also opened. At this time, the first pipeline 101 is opened and the second pipeline 301, the first wastewater pipeline 102 and the second wastewater pipeline 402 are closed. The raw water flows through the ultrafiltration filter mechanism 100 and flushes the ultrafiltration filter mechanism 100, and wastewater is output from the first wastewater pipeline 102.

[0083] When the water purifier is in ultrasonic cleaning mode or static soaking mode, the first wastewater valve 102a, the inlet valve 101a, the pump body 301a and the second wastewater valve 402a are closed. At this time, the first pipeline 101, the second pipeline 301, the first wastewater pipeline 102 and the second wastewater pipeline 402 are closed.

[0084] In this embodiment, the pump body 301a is a booster pump. In other embodiments, the pump body 301a may be other types of pumps.

[0085] In this embodiment, the inlet valve 101a, the first wastewater valve 102a, and the second wastewater valve 402a can all be solenoid valves, or they can be different types of mechanical valves. Here, the type of each valve is not specifically limited.

[0086] Please refer to Figure 1 The third pipeline 401 is also equipped with a check valve 401a, which is used to ensure that the liquid can only flow out from the outlet of the reverse osmosis filtration unit 400 to the inlet of the post-filter element in one direction.

[0087] It should be noted that the outlet of the reverse osmosis filter unit 400 is connected to the inlet of the post-filter cartridge through a third pipeline 401. By setting a check valve 401a, it is possible to effectively prevent water from flowing back from the inlet of the post-filter cartridge to the outlet of the reverse osmosis filter unit 400.

[0088] In this embodiment, the check valve 401a can be either a solenoid valve or a mechanical valve. No specific limitation is made on the type of valve.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for cleaning the ultrafiltration mechanism of a water purifier, characterized in that, Includes the following steps: The water purifier is controlled to operate in a hydraulic cleaning state to perform the hydraulic cleaning action of the ultrafiltration filtration mechanism (100); The water purifier is controlled to switch to ultrasonic cleaning mode to perform ultrasonic cleaning of the ultrafiltration mechanism (100); The water purifier is controlled to switch to a static soaking state to perform the static soaking action of the ultrafiltration mechanism (100); It also includes the following steps: When the water purifier operates in the hydraulic cleaning state for a time T1, it switches to the ultrasonic cleaning state. When the ultrasonic cleaning state operation time reaches T2, the water purifier switches to the static soaking state operation time T3. The flow rate of the ultrafiltration unit (100) is detected; When the outflow rate of the ultrafiltration unit (100) is greater than or equal to a preset value, the static soaking action of the ultrafiltration unit (100) is stopped. When the outflow rate of the ultrafiltration unit (100) is less than a preset value, the hydraulic cleaning action, the ultrasonic cleaning action and the static soaking action of the ultrafiltration unit (100) are executed cyclically.

2. The cleaning method for the ultrafiltration mechanism of the water purifier according to claim 1, characterized in that, The value of T1 ranges from 1 to 10 minutes.

3. The cleaning method for the ultrafiltration mechanism of the water purifier according to claim 1, characterized in that, The value of T2 ranges from 1 to 10 minutes.

4. The cleaning method for the ultrafiltration mechanism of the water purifier according to claim 1, characterized in that, The value of T3 ranges from 10 to 60 minutes.

5. The cleaning method for the ultrafiltration mechanism of the water purifier according to claim 1, characterized in that, The water purifier cycles through the hydraulic cleaning action, the ultrasonic cleaning action, and the static soaking action 1 to 10 times.

6. A water purifier employing the cleaning method as described in any one of claims 1-5, characterized in that, include: An ultrafiltration unit (100) includes a housing (110) and an ultrafiltration filter element, wherein the ultrafiltration filter element is housed within the housing (110); An ultrasonic cleaning unit (200) extends at least partially into the housing (110) and is used to emit ultrasonic waves; When the water purifier is in ultrasonic cleaning mode, the ultrasonic cleaning unit (200) is turned on; when the water purifier is in non-ultrasonic cleaning mode, the ultrasonic cleaning unit (200) is turned off.

7. The water purifier according to claim 6, characterized in that, At least one of the ultrasonic cleaning units (200) is provided on the top and / or bottom of the housing (110).

8. The water purifier according to claim 6, characterized in that, The outer casing (110) has at least two ultrasonic cleaning units (200) on its side, and each ultrasonic cleaning unit (200) is evenly distributed on opposite sides of the outer casing (110).

9. The water purifier according to claim 6, characterized in that, The ultrasonic cleaning unit (200) is an ultrasonic transducer, an ultrasonic probe, or an ultrasonic ring.

10. The water purifier according to claim 6, characterized in that, The water purifier also includes an activated carbon filtration mechanism (300) and a reverse osmosis filtration mechanism (400), the ultrafiltration filtration mechanism (100) is connected to the activated carbon filtration mechanism (300), and the activated carbon filtration mechanism (300) is connected to the reverse osmosis filtration mechanism (400).

11. The water purifier according to claim 10, characterized in that, The activated carbon filtration mechanism (300) includes a pre-filter and a post-filter. The outlet of the ultrafiltration filtration mechanism (100) is connected to the inlet of the pre-filter through a first pipe (101). The outlet of the pre-filter is connected to the inlet of the reverse osmosis filtration mechanism (400) through a second pipe (301). The outlet of the reverse osmosis filtration mechanism (400) is connected to the inlet of the post-filter through a third pipe (401). The outlet of the post-filter is a pure water outlet (302). The wastewater outlet of the ultrafiltration filtration mechanism (100) is provided with a first wastewater pipe (102), and the wastewater outlet of the reverse osmosis filtration mechanism (400) is provided with a second wastewater pipe (402).

12. The water purifier according to claim 11, characterized in that, The first pipeline (101) is provided with an inlet valve (101a), the second pipeline (301) is provided with a pump body (301a), the first wastewater pipeline (102) is provided with a first wastewater valve (102a), and the second wastewater pipeline (402) is provided with a second wastewater valve (402a). When the water purifier is in normal water production mode, the inlet valve (101a) and the pump body (301a) are opened, and the first wastewater valve (102a) and the second wastewater valve (402a) are closed. When the water purifier is in hydraulic cleaning mode, the first wastewater valve (102a) is opened, and the inlet valve (101a), the pump body (301a) and the second wastewater valve (402a) are also opened. When the water purifier is in ultrasonic cleaning mode or static soaking mode, the first wastewater valve (102a), the inlet valve (101a), the pump body (301a) and the second wastewater valve (402a) are closed.

13. The water purifier according to claim 11, characterized in that, The third pipeline (401) is also equipped with a check valve (401a), which is used to ensure that the liquid can only flow out from the outlet of the reverse osmosis filtration mechanism (400) to the inlet of the post-filter element in one direction.

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