Water purification equipment

Abstract

The utility model relates to the technical field of water purification, particularly provides water purification equipment, and aims to solve the problem that the use cost of the conventional water purifier is high due to frequent replacement of a reverse osmosis membrane filter element. The water purification equipment comprises a reverse osmosis membrane filter element, a water inlet main path, a cleaning assembly and a circulating pump, a first cleaning agent storage component is arranged on the water inlet main path, the water inlet end of a first cleaning pipe is communicated with the wastewater end of the reverse osmosis membrane filter element, and the water outlet end of the first cleaning pipe is communicated with the water inlet main path to form a first cleaning loop; the circulating pump can drive liquid in the first cleaning loop to flow circularly, and the first cleaning agent storage component is arranged to allow water in the water inlet main path to enter the reverse osmosis membrane filter element when in a first working state and to convey cleaning liquid to the reverse osmosis membrane filter element when in a second working state. According to the water purifier, the reverse osmosis membrane filter element can be cleaned, the filter element does not need to be frequently replaced, internal pipeline connection of the water purifier can be simplified, and the cost of the water purifier is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and specifically provides a water purification device. Background Technology

[0002] As people's living standards improve, their demand for drinking water is also increasing. Water purifiers, water purifier-drinking machines, and other water purification equipment are gradually becoming essential drinking water facilities in people's daily lives.

[0003] After prolonged use, dirt and grime in the water will adhere to the inside of the reverse osmosis membrane filter element, affecting the water production rate of the water purification equipment and thus the service life of the reverse osmosis membrane filter element. If the reverse osmosis membrane filter element continues to work, it will not be able to effectively filter the water, resulting in a decline in the water quality of the water purification equipment.

[0004] In existing technologies, when the reverse osmosis membrane filter cartridge reaches the end of its service life, it is usually necessary to replace the reverse osmosis membrane filter cartridge to solve the problems of low water production rate and declining water quality in water purification equipment. However, due to the high cost of reverse osmosis membrane filter cartridges, they need to be replaced frequently, resulting in high operating costs for water purification equipment and affecting the user experience. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, that is, to solve the problem that the existing water purification equipment has high operating costs due to the need for frequent replacement of reverse osmosis membrane filter elements, resulting in poor user experience.

[0006] This utility model provides a water purification device, which includes: a reverse osmosis membrane filter element; a main water inlet channel connected to the inlet end of the reverse osmosis membrane filter element to supply water to the reverse osmosis membrane filter element; a cleaning component including a first cleaning agent storage component and a first cleaning pipe, wherein the first cleaning agent storage component is disposed on the main water inlet channel, the inlet end of the first cleaning pipe is connected to the wastewater end of the reverse osmosis membrane filter element, and the outlet end of the first cleaning pipe is connected to the main water inlet channel, so that the first cleaning agent storage component, the inlet end of the reverse osmosis membrane filter element, and the wastewater end of the reverse osmosis membrane filter element are sequentially connected to form a first cleaning circuit; and a circulation pump disposed on the first cleaning circuit and capable of driving the liquid circulation flow within the first cleaning circuit; wherein, the first cleaning agent storage component is configured to allow water in the main water inlet channel to enter the reverse osmosis membrane filter element when it is in a first working state and to deliver cleaning liquid to the reverse osmosis membrane filter element when it is in a second working state.

[0007] In the preferred embodiment of the above-mentioned water purification equipment, the cleaning component further includes a second cleaning pipe, a second cleaning agent storage component and a second cleaning valve disposed on the second cleaning pipe. The inlet end of the second cleaning pipe is connected to the wastewater end of the reverse osmosis membrane filter element, and the outlet end of the second cleaning pipe is connected to the inlet end of the reverse osmosis membrane filter element, so that the second cleaning agent storage component, the inlet end of the reverse osmosis membrane filter element and the wastewater end of the reverse osmosis membrane filter element are sequentially connected to form a second cleaning circuit. The circulation pump can also drive the liquid in the second cleaning circuit to circulate.

[0008] In the preferred embodiment of the above-mentioned water purification equipment, the inlet end of the first cleaning pipe and the inlet end of the second cleaning pipe meet and are connected to the wastewater end of the reverse osmosis membrane filter element through the first connecting pipe. The circulation pump is installed on the first connecting pipe and can drive the liquid circulation flow in the first cleaning circuit and / or the second cleaning circuit. Alternatively, the outlet end of the first cleaning pipe and the outlet end of the second cleaning pipe meet and are connected to the main water inlet through the second connecting pipe. The circulation pump is installed on the second connecting pipe and can drive the liquid circulation flow in the first cleaning circuit and / or the second cleaning circuit.

[0009] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a protective component, wherein the protective component is disposed on the first connecting pipe and located at the upstream end of the circulation pump, and the protective component is capable of resisting the high pressure at the wastewater end of the reverse osmosis membrane filter element; or, the protective component is disposed on the second connecting pipe and located at the downstream end of the circulation pump, and the protective component is capable of resisting the high pressure in the main inlet water line.

[0010] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a booster pump installed on the main water inlet pipe, the booster pump being located at the upstream end of the second connecting pipe.

[0011] In the preferred embodiment of the above-mentioned water purification equipment, the cleaning component further includes a one-way valve, which is located at the downstream end of the second cleaning agent storage component and can prevent water in the main water inlet from entering the second cleaning agent storage component.

[0012] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a flow control component, which is disposed on the first cleaning pipe and / or the second cleaning pipe; and / or, the water purification equipment further includes a dirt collection component, which is used to collect dirt in the first cleaning circuit and / or the second cleaning circuit.

[0013] In the preferred embodiment of the above-mentioned water purification equipment, the first cleaning agent storage component includes a shell with a cavity inside. The shell is provided with a cleaning agent dispensing port communicating with the cavity. When the first cleaning agent storage component is in the second working state, cleaning agent can be dispensed into the cavity through the dispensing port. Alternatively, the first cleaning agent storage component includes a shell and a sealing member. The shell has a water passage and a cavity inside. The cavity has an opening, and the sealing member is disposed at the opening and can open or close the opening.

[0014] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes an auxiliary cleaning component, which is configured to promote the interaction between the cleaning liquid and the dirt on the reverse osmosis membrane filter element, thereby removing the dirt from the reverse osmosis membrane filter element; and / or, the water purification equipment further includes a pre-filtration unit, the outlet end of which is connected to the first end of the main water inlet; and / or, the water purification equipment further includes a pure water outlet pipe and a pure water user component, the pure water end of the reverse osmosis membrane filter element being connected to the pure water user component through the pure water outlet pipe.

[0015] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a return pipe and a return valve. One end of the return pipe is connected to the pure water end of the reverse osmosis membrane filter element, and the other end of the return pipe is connected to the main water inlet. The return valve is installed on the return pipe and is used to control the opening and closing of the return pipe. Alternatively, the water purification equipment further includes a drain pipe and a drain valve. One end of the drain pipe is connected to the pure water outlet pipe, and the other end of the drain pipe is connected to the wastewater outlet pipe of the water purification equipment. The drain valve is installed on the drain pipe and is used to control the opening and closing of the drain pipe.

[0016] Under the aforementioned preferred technical solution, this application enables the cleaning agent within the first cleaning agent storage component to clean the reverse osmosis membrane filter element by setting a first cleaning agent storage component on the main water inlet line. This removes dirt from the reverse osmosis membrane filter element, improves the water production rate and quality of the reverse osmosis membrane filter element, eliminates the need for frequent replacement of the reverse osmosis membrane filter element, reduces the operating cost of the water purification equipment, and greatly enhances the user experience. Furthermore, by directly setting the first cleaning agent storage component on the main water inlet line, water from the main water inlet line can enter the reverse osmosis membrane filter element when the water purification equipment is in normal water production mode, and cleaning liquid can be delivered to the reverse osmosis membrane filter element when the water purification equipment is in cleaning mode. This is different from the prior art where the cleaning component is set in parallel on the main water inlet line. Compared to conventional methods, this approach simplifies the internal piping connections of water purification equipment, reduces the use of pipes and valves, lowers the cost of the equipment, and allows for multiple cyclic flushing of the reverse osmosis membrane filter element by forming a first cleaning loop. This improves the cleaning effect on the filter element. By using a circulation pump to drive the cleaning solution circulation, the use of a booster pump can be avoided. This prevents damage to the diaphragm within the booster pump, extending its lifespan. Furthermore, compared to using a booster pump to drive the cleaning solution circulation within the cleaning loop, the absence of high pressure reduces the amount of cleaning solution penetrating to the pure water end of the reverse osmosis membrane filter element. This not only reduces chemical residues but also minimizes damage to the membrane.

[0017] Furthermore, by setting up a second cleaning pipe and a second cleaning agent storage component, different types of cleaning agents can be used to clean the reverse osmosis membrane filter element. This allows for the selection of appropriate cleaning agents based on the type of fouling on the reverse osmosis membrane filter element, improving the cleaning effect. At the same time, by forming a second cleaning circuit, when the cleaning agent in the second cleaning agent storage component is used to clean the reverse osmosis membrane filter element, the reverse osmosis membrane filter element can be repeatedly flushed, further improving the cleaning effect.

[0018] Furthermore, by setting up protective components, when the reverse osmosis membrane filter cartridge is in normal water production mode, the protective components can resist the water pressure at the wastewater end of the reverse osmosis membrane filter cartridge or the high water pressure in the main inlet water line, thereby avoiding the problem of water leakage caused by high pressure in the circulation pump, and further improving the user experience.

[0019] Furthermore, by setting the booster pump to be located upstream of the second connecting pipe, the cleaning fluid can be prevented from flowing through the booster pump, thereby preventing the cleaning fluid from corroding the booster pump, extending the booster pump's service life, and further improving the user experience. Attached Figure Description

[0020] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of a first embodiment of the water purification equipment of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a second embodiment of the water purification equipment of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the water purification equipment of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the water purification equipment of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of one embodiment of the first cleaning agent storage component of this utility model;

[0026] Figure 6 This is a schematic diagram of another embodiment of the first cleaning agent storage component of this utility model.

[0027] List of reference numerals in the attached diagram:

[0028] 1. Main water inlet pipe; 11. Inlet valve; 12. Booster pump; 2. Reverse osmosis membrane filter element; 21. Wastewater outlet pipe; 211. Wastewater valve; 22. Drain pipe; 221. Drain valve; 23. Return pipe; 231. Return valve; 311. First cleaning pipe; 312. First cleaning valve; 313. First cleaning agent storage component; 31301. Liquid inlet; 31302. Liquid outlet; 3131. Shell; 3132. Cavity; 3133. Dispensing port; 313 4. Sealing component; 3135. Water passage; 3136. Opening; 3137. Cleaning agent; 3138. Grip part; 321. Second cleaning pipe; 322. Second cleaning valve; 323. Second cleaning agent storage component; 33. Check valve; 34. First connecting pipe; 35. Second connecting pipe; 4. Pre-filter unit; 5. Pure water outlet pipe; 51. Pure water usage component; 6. Circulation pump; 7. Flow control component; 8. Dirt collection component; 9. Protective component. Detailed Implementation

[0029] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0030] It should be noted that in the description of this utility model, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] like Figures 1 to 4 As shown, the water purification equipment of this utility model includes a reverse osmosis membrane filter element 2, a main water inlet 1, a cleaning component, and a circulation pump 6. The main water inlet 1 is connected to the water inlet end of the reverse osmosis membrane filter element 2 so as to supply water to the reverse osmosis membrane filter element 2.

[0033] like Figures 1 to 4 As shown, the cleaning assembly includes a first cleaning agent storage component 313 and a first cleaning pipe 311. The first cleaning agent storage component 313 is disposed on the main water inlet 1. The inlet end of the first cleaning pipe 311 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the outlet end of the first cleaning pipe 311 is connected to the main water inlet 1, so that the first cleaning agent storage component 313, the inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially connected to form a first cleaning circuit. The circulation pump 6 can drive the liquid in the first cleaning circuit to circulate.

[0034] The first cleaning agent storage component 313 is configured to allow water in the main inlet channel 1 to enter the reverse osmosis membrane filter element 2 when it is in a first working state, and to deliver cleaning liquid to the reverse osmosis membrane filter element 2 when it is in a second working state.

[0035] With this setup, the first cleaning agent storage component 313 can be installed on the main water inlet 1, allowing the cleaning agent in the first cleaning agent storage component 313 to clean the reverse osmosis membrane filter element 2, remove dirt from the reverse osmosis membrane filter element 2, improve the water production rate and water quality of the reverse osmosis membrane filter element 2, eliminate the need for frequent replacement of the reverse osmosis membrane filter element 2, reduce the operating cost of the water purification equipment, and greatly enhance the user experience.

[0036] Furthermore, by directly installing the first cleaning agent storage component 313 on the main water inlet 1, water from the main water inlet 1 can enter the reverse osmosis membrane filter element 2 when the water purification equipment is in normal water production mode, and cleaning liquid can be delivered to the reverse osmosis membrane filter element 2 when the water purification equipment is in cleaning mode. Compared with the form of parallel installation of cleaning components on the main water inlet 1, this simplifies the internal piping connection of the water purification equipment, reduces the use of pipes and valves, and lowers the cost of the water purification equipment. Moreover, by forming the first cleaning loop, the reverse osmosis membrane filter element 2 can be repeatedly flushed, improving the cleaning effect of the reverse osmosis membrane filter element 2.

[0037] It should be noted that the circulation pump 6 can be set as a booster pump 12 located on the main water inlet 1, and the booster pump 12 can drive the liquid circulation flow in the first cleaning circuit. Alternatively, the circulation pump 6 can be set as a water pump at any possible location on the cleaning circuit, and the water pump can drive the liquid circulation flow in the first cleaning circuit, etc. Such adjustments and changes to the specific configuration of the circulation pump 6 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0038] Preferably, the circulation pump 6 is a water pump installed on the first cleaning pipe 311 or the main water inlet pipe 1.

[0039] By configuring the circulation pump 6 as a booster pump 12 and using the booster pump 12 to drive the liquid circulation in the first cleaning circuit, this configuration avoids the need for the booster pump 12. On the one hand, it prevents the cleaning liquid from damaging the diaphragm inside the booster pump 12, thereby extending the service life of the booster pump 12. On the other hand, compared to using the booster pump 12 to drive the cleaning liquid circulation in the cleaning circuit, the absence of high pressure reduces the amount of cleaning liquid permeating to the pure water end of the reverse osmosis membrane filter element 2, which not only reduces chemical residues but also minimizes damage to the membrane of the reverse osmosis membrane filter element 2.

[0040] It should be noted that in practical applications, a first cleaning valve 312 can be set on the first cleaning pipe 311 to switch between the water production mode and the cleaning mode. Alternatively, a reversing valve can be set to switch between the water production mode and the cleaning mode. The first port of the reversing valve is connected to the wastewater end of the reverse osmosis membrane filter element 2, the second port of the reversing valve is connected to the wastewater outlet pipe 21, the third port of the reversing valve is connected to the water inlet end of the first cleaning pipe 311, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0041] Preferably, such as Figures 1 to 4As shown, the water purification equipment also includes a first cleaning valve 312, which is disposed on the first cleaning pipe 311 and is used to control the opening and closing of the first cleaning pipe 311.

[0042] Compared to switching between water purification and cleaning modes by setting a reversing valve, this configuration further reduces the cost of the water purification equipment and enhances the user experience by installing a first reversing valve on the first cleaning pipe 311.

[0043] Preferably, such as Figures 1 to 4 As shown, the cleaning assembly also includes a second cleaning pipe 321, a second cleaning agent storage component 323 and a second cleaning valve 322 disposed on the second cleaning pipe 321. The inlet end of the second cleaning pipe 321 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the outlet end of the second cleaning pipe 321 is connected to the inlet end of the reverse osmosis membrane filter element 2, so that the second cleaning agent storage component 323, the inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially connected to form a second cleaning circuit; wherein, the circulation pump 6 can also drive the liquid circulation flow in the second cleaning circuit.

[0044] With this setup, different types of cleaning agents can be used to clean the reverse osmosis membrane filter element 2, allowing for the selection of appropriate cleaning agents based on the type of fouling on the reverse osmosis membrane filter element 2, thereby improving the cleaning effect. At the same time, by forming a second cleaning loop, when the cleaning agent in the second cleaning agent storage component 323 is used to clean the reverse osmosis membrane filter element 2, the reverse osmosis membrane filter element 2 can be repeatedly flushed, further improving the cleaning effect.

[0045] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific location of the circulating pump 6, as long as it can drive the liquid circulation in the first cleaning circuit and the second cleaning circuit.

[0046] The following sections will introduce several scenarios.

[0047] Scenario 1:

[0048] like Figure 1 and Figure 3 As shown, the inlet end of the first cleaning pipe 311 and the inlet end of the second cleaning pipe 321 meet and are connected to the wastewater end of the reverse osmosis membrane filter element 2 through the first connecting pipe 34. The circulation pump 6 is installed on the first connecting pipe 34 and can drive the liquid circulation flow in the first cleaning circuit and / or the second cleaning circuit.

[0049] Preferably, such as Figure 1 and Figure 3As shown, the water purification equipment of this utility model also includes a protective component 9. The protective component 9 is disposed on the first connecting pipe 34 and located at the upstream end of the circulating pump 6. The protective component 9 can resist the high pressure of the wastewater end of the reverse osmosis membrane filter element 2.

[0050] During normal water purification, the pressure at the wastewater end of the reverse osmosis membrane filter element 2 is relatively high due to the pressurization effect of the booster pump 12. In order to reduce costs and increase efficiency, the lower-cost and less pressure-resistant circulation pump 6 is selected to drive the cleaning liquid circulation. By setting the protective component 9, the water pressure at the wastewater end of the reverse osmosis membrane filter element 2 can be resisted, thereby avoiding the problem of water leakage caused by high pressure in the circulation pump 6, and further improving the user experience.

[0051] Scenario 2:

[0052] like Figure 2 and Figure 4 As shown, the outlet end of the first cleaning pipe 311 and the outlet end of the second cleaning pipe 321 meet and are connected to the wastewater end of the reverse osmosis membrane filter element 2 through the second connecting pipe 35. The circulation pump 6 is installed on the second connecting pipe 35 and can drive the liquid circulation flow in the first cleaning circuit and / or the second cleaning circuit.

[0053] Preferably, such as Figure 2 and Figure 4 As shown, the water purification equipment of this utility model also includes a protective component 9. The protective component 9 is disposed on the second connecting pipe 35 and located at the downstream end of the circulating pump 6. The protective component 9 can resist the high pressure in the main water inlet 1.

[0054] When the water purification equipment is producing water normally, the water pressure in the main inlet pipe 1 is relatively high due to the booster pump 12. In order to reduce costs and increase efficiency, the circulation pump 6, which is less costly and less resistant to high pressure, is selected to drive the cleaning liquid circulation. By setting the protective component 9, it can resist the water pressure in the main inlet pipe 1 and avoid the circulation pump 6 from leaking due to high pressure, thus further improving the user experience.

[0055] It should be noted that this utility model does not limit the specific type of the protective component 9. For example, the protective component 9 can be set as a one-way valve, or it can be set as a pressure reducing valve, etc. Such adjustments and changes to the specific type of the protective component 9 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0056] Preferably, such as Figure 1 , Figure 3 As shown, protective component 9 is a one-way valve.

[0057] Preferably, such as Figure 2 , Figure 4As shown, protective component 9 is a pressure reducing valve.

[0058] It should be noted that in practical applications, the first connecting pipe 34 can be directly connected to the wastewater outlet of the reverse osmosis membrane filter element 2, or the first connecting pipe 34 can be connected to the wastewater outlet pipe 21, etc. Such adjustments and changes to the connection method between the first connecting pipe 34 and the wastewater end of the reverse osmosis membrane filter element 2 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0059] Preferably, such as Figures 1 to 4 As shown, the first connecting pipe 34 is connected to the wastewater outlet pipe 21.

[0060] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific connection position between the second connecting pipe 35 and the main water inlet 1. For example, the second connecting pipe 35 can be set to connect with the downstream end of the booster pump 12, or the second connecting pipe 35 can be set to connect with the upstream end of the booster pump 12, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0061] Preferably, such as Figures 1 to 4 As shown, the water purification equipment also includes a booster pump 12, and the second connecting pipe 35 is connected to the main water inlet 1 and is located at the downstream end of the booster pump 12.

[0062] By positioning the second connecting pipe 35 downstream of the booster pump 12, the cleaning fluid can be prevented from flowing through the booster pump 12, thereby preventing the cleaning fluid from corroding the booster pump 12, extending the service life of the booster pump 12, and further improving the user experience.

[0063] It should be noted that although the present invention describes the specific installation position of the circulation pump 6 in the above two scenarios, this is not restrictive. For example, the circulation pump 6 can also be installed on the main water inlet 1, or it can be installed in any other possible location, etc. Such adjustments and changes to the specific installation position of the circulation pump 6 do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0064] It should be noted that, in practical applications, this utility model does not impose any limitations on the specific structural form of the first cleaning agent storage component 313, as long as the first cleaning agent storage component 313 is configured to allow water in the main water inlet 1 to enter the reverse osmosis membrane filter element 2 when it is in the first working state and to deliver cleaning liquid to the reverse osmosis membrane filter element 2 when it is in the second working state.

[0065] In one specific embodiment, such as Figure 5 As shown, the first cleaning agent storage component 313 includes a housing 3131, a cavity 3132 inside the housing 3131, and a cleaning agent dispensing port 3133 on the housing 3131 that communicates with the cavity 3132. When the first cleaning agent storage component 313 is in the second working state, cleaning agent can be dispensed into the cavity 3132 through the dispensing port 3133.

[0066] When the first cleaning module is not required to clean the reverse osmosis membrane filter element 2, no cleaning agent is added to the cavity 3132. At this time, the first cleaning agent storage component 313 is equivalent to a passage that allows water in the main inlet 1 to enter the inlet end of the reverse osmosis membrane filter element 2. When the first cleaning module is required to clean the reverse osmosis membrane filter element 2, the user adds cleaning agent to the cavity 3132 through the inlet 3133. After the water in the main inlet 1 enters the cavity 3132 through the liquid inlet 31301, it dissolves the cleaning agent to form a cleaning solution. The cleaning solution is then delivered to the reverse osmosis membrane filter element 2 through the liquid outlet 31302 to clean the reverse osmosis membrane filter element 2.

[0067] It should be noted that cleaning solution can also be directly added into the cavity 3132 through the inlet 3133, so that the cleaning solution is delivered into the reverse osmosis membrane filter element 2 to clean the reverse osmosis membrane filter element 2.

[0068] In another specific embodiment, such as Figure 6 As shown, the first cleaning agent storage component 313 includes a housing 3131 and a sealing member 3134. The housing 3131 has a water passage 3135 and a cavity 3132. The cavity 3132 has an opening 3136. The sealing member 3134 is disposed at the opening 3136 and can open or close the opening 3136.

[0069] With this setup, the cleaning agent can be pre-stored in the first cleaning agent storage component 313. When the first cleaning module does not need to clean the reverse osmosis membrane filter element 2, the sealing component 3134 closes the opening 3136, preventing the water passage 3135 from connecting with the cavity 3132. At this time, the water in the main inlet 1 can enter the inlet end of the reverse osmosis membrane filter element 2 through the water passage 3135. When the first cleaning module needs to clean the reverse osmosis membrane filter element 2, the sealing component 3134 opens the opening 3136, connecting the water passage 3135 with the cavity 3132. The water in the main inlet 1 enters the water passage 3135 through the liquid inlet 31301 and enters the cavity 3132 through the opening 3136 to dissolve the cleaning agent stored in the cavity 3132, forming a cleaning solution, which is then transported to the reverse osmosis membrane filter element 2 through the liquid outlet 31302 to clean the reverse osmosis membrane filter element 2.

[0070] Preferably, such as Figure 6As shown, the first cleaning agent storage component also includes a grip portion 3138, which is located outside the housing 3131 and connected to the sealing member 3134, so as to open or close the opening 3136 by means of the grip portion 3138.

[0071] It should be noted that, in practical applications, this utility model does not impose any limitations on the type of cleaning agent in the first cleaning agent storage component 313 and the second cleaning agent storage component 323. For example, the cleaning agent can be set to an acidic cleaning agent, or it can be set to an alkaline cleaning agent, or it can be set to an oxidizing cleaning agent, etc. Such adjustments and changes to the type of cleaning agent do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0072] Preferably, the first cleaning agent storage component 313 is used to store acidic cleaning agents, and the second cleaning agent storage component 323 is used to store alkaline cleaning agents.

[0073] It should be noted that this utility model does not limit the specific type of acidic cleaning agent. For example, the acidic cleaning agent can be at least one of malic acid, citric acid, hydrochloric acid, and phosphoric acid. Of course, the acidic cleaning agent can also be other types of acidic cleaning agents, and those skilled in the art can make adjustments according to actual needs.

[0074] Preferably, the acidic cleaning agent is malic acid or citric acid, which not only cleans dirt but also has a good disinfection and antibacterial effect, and can disinfect and inhibit bacteria on the reverse osmosis membrane filter element 2.

[0075] It should also be noted that this utility model does not limit the specific type of alkaline cleaning agent. For example, the alkaline cleaning agent can be set to at least one of dishwashing powder, baking soda, sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium citrate, tetrasodium ethylenediaminetetraacetate, sodium dodecyl sulfate, sodium disulfite, and sodium bisulfite. Of course, the alkaline cleaning agent can also be other types of alkaline cleaning agents, and those skilled in the art can make adjustments according to actual needs.

[0076] It should also be noted that this utility model does not limit the form of the cleaning agent in the first cleaning agent storage component 313 and the second cleaning agent storage component 323. For example, the cleaning agent in the first cleaning agent storage component 313 and the second cleaning agent storage component 323 can be set as a solid or liquid cleaning agent, etc. Such adjustments and changes to the specific form of the cleaning agent stored in the first cleaning agent storage component 313 and the second cleaning agent storage component 323 do not deviate from the principle and scope of this utility model, and should be included within the protection scope of this utility model.

[0077] Preferably, the cleaning agents stored in the first cleaning agent storage component 313 and the second cleaning agent storage component 323 are both in solid form.

[0078] More preferably, in order to accelerate the dissolution of the cleaning agent, the cleaning agent is in granular or powder form.

[0079] It should also be noted that, in practical applications, those skilled in the art can set a check valve structure in the second cleaning agent storage component 323 to prevent water in the main water inlet 1 from entering the second cleaning agent storage component 323, or a one-way valve 33 can be set at the downstream end of the second cleaning agent storage component 323 to prevent water in the main water inlet 1 from entering the cleaning agent storage component, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0080] Preferably, such as Figures 1 to 4 As shown, the cleaning assembly also includes a one-way valve 33, which is located downstream of the second cleaning agent storage member 323 and can prevent water in the main water inlet 1 from entering the second cleaning agent storage member 323.

[0081] It should be noted that the water purification equipment of this utility model can also periodically flush the reverse osmosis membrane filter element 2 by means of the first cleaning circuit. That is, the water in the main inlet channel 1 flows in through the inlet end of the reverse osmosis membrane filter element 2, then flows out from the wastewater end of the reverse osmosis membrane filter element 2, and finally is transported to the inlet end of the reverse osmosis membrane filter element 2 through the first cleaning circuit to achieve cyclic flushing, which greatly improves the flushing effect of the reverse osmosis membrane filter element 2.

[0082] It should also be noted that the circulation flushing of the reverse osmosis membrane filter element 2 is not limited to the first cleaning circuit. For example, after the cleaning agent in the second cleaning agent storage component 323 has finished cleaning the reverse osmosis membrane filter element 2, the circulation flushing of the reverse osmosis membrane filter element 2 can also be achieved by the second cleaning circuit. That is, the water in the main inlet water line 1 enters the reverse osmosis membrane filter element 2, then flows out through the wastewater end of the reverse osmosis membrane filter element 2, and flows back to the inlet end of the reverse osmosis membrane filter element 2 through the second cleaning pipe 321, the second connecting pipe 35, and the main inlet water line 1.

[0083] Preferably, such as Figures 1 to 4 As shown, the water purification equipment of this utility model also includes a flow control component 7, wherein the flow control component 7 is disposed on the first cleaning circuit and / or the second cleaning circuit and is used to control the water flow rate from the wastewater end of the reverse osmosis membrane filter element 2 to the water inlet end of the reverse osmosis membrane filter element 2.

[0084] By setting the flow control component 7, the water flow rate from the wastewater end of the reverse osmosis membrane filter element 2 to the water inlet end of the reverse osmosis membrane filter element 2 can be controlled. When the water purification equipment is in normal water production mode, the amount of wastewater that has been filtered by the reverse osmosis membrane filter element 2 and flows back to the water inlet end of the reverse osmosis membrane filter element 2 can be adjusted to control the wastewater recovery rate. On the one hand, this can avoid the waste of water resources due to the low wastewater recovery rate, and on the other hand, it can also avoid the service life of the reverse osmosis membrane filter element 2 due to the high wastewater recovery rate.

[0085] It should be noted that the flow control component 7 can be set to a wastewater ratio, or it can be set to a proportional valve, or it can be set to a water-blocking block with a water passage hole, etc. Such adjustments and changes to the specific setting type of the flow regulating component do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0086] Preferably, the flow control component 7 is a wastewater ratio.

[0087] It should be noted that, in practical applications, those skilled in the art can set the flow control component 7 on the first cleaning pipe 311 or the second cleaning pipe 321, or they can set the flow control component 7 on the first connecting pipe 34 or the second connecting pipe 35, etc. Such adjustments and changes to the specific setting position of the flow control component 7 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0088] Preferably, the flow control component 7 is disposed on the first cleaning pipe 311.

[0089] Preferably, such as Figures 1 to 4 As shown, the water purification device of this utility model also includes a dirt collection component 8, which is used to collect dirt in the first cleaning circuit and / or the second cleaning circuit.

[0090] By setting up the dirt collection component 8, when cleaning the reverse osmosis membrane filter element 2 or when circulating and rinsing the reverse osmosis membrane filter element 2, the dirt in the first cleaning circuit and / or the second cleaning circuit can be collected by the dirt collection component 8, so as to prevent the dirt cleaned (or rinsed) from causing secondary pollution to the reverse osmosis membrane filter element 2.

[0091] It should be noted that the invention is not limited to setting up a dirt collection component 8 to collect dirt in the cleaning circuit. For example, the first cleaning agent storage component 313 and / or the second cleaning agent storage component 323 can be configured to store cleaning agent when they are in the first working state and to collect dirt in the cleaning circuit when they are in the second working state, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0092] In another possible embodiment, the first cleaning agent storage member 313 and / or the second cleaning agent storage member 323 are configured to store cleaning agent when in a first operating state and to collect dirt in the cleaning circuit when in a second operating state.

[0093] With this configuration, dirt can be collected by the first detergent storage component 313 and / or the second detergent storage component 323, eliminating the need for additional impurity collection components and further reducing the cost of the water purification equipment.

[0094] Specifically, the first cleaning agent storage component 313 or the second cleaning agent storage component 323 has a cavity and a filter screen. When the reverse osmosis membrane filter element 2 does not need to be cleaned, the cleaning agent is stored in the cavity. When the reverse osmosis membrane filter element 2 needs to be cleaned, the cleaning agent dissolves and the filter screen intercepts the dirt into the cavity for collection.

[0095] Preferably, the water purification device of this utility model further includes an auxiliary cleaning component (not shown in the figure), which is configured to promote the interaction between the cleaning liquid and the dirt on the reverse osmosis membrane filter element 2, thereby removing the dirt from the reverse osmosis membrane filter element 2.

[0096] By setting up auxiliary cleaning components, it is easier for the cleaning solution to react physically or chemically with the dirt on the reverse osmosis membrane filter element 2, thereby making it easier to remove the dirt from the reverse osmosis membrane filter element 2, further improving the cleaning efficiency and cleaning effect of the reverse osmosis membrane filter element 2, and further enhancing the user experience.

[0097] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific type of auxiliary cleaning components, as long as they can promote the interaction between the cleaning liquid and the dirt on the reverse osmosis membrane filter element 2, thereby removing the dirt from the reverse osmosis membrane filter element 2.

[0098] In one specific embodiment, the auxiliary cleaning component includes a heating module, wherein the heating module is disposed on the cleaning circuit.

[0099] This setup allows hot cleaning fluid to be delivered into the reverse osmosis membrane filter element 2, promoting the interaction between the cleaning fluid and the dirt on the reverse osmosis membrane filter element 2, thereby aiding in the removal of dirt. In addition, the heating module also helps dissolve the cleaning agent, thereby increasing the dissolution rate and solubility of the cleaning agent, further enhancing the user experience.

[0100] It should be noted that this utility model does not limit the specific location of the heating module in the cleaning circuit. For example, the heating module can be set on the cleaning pipeline, or on the circulation pipe, or it can be set outside the cleaning agent storage component, etc. Such adjustments and changes to the specific location of the heating module do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0101] In another specific embodiment, the auxiliary cleaning component includes an ultrasonic module, wherein the ultrasonic module is disposed outside the reverse osmosis membrane filter element 2 and is capable of causing the reverse osmosis membrane filter element 2 to vibrate at high frequency and low amplitude, which helps to remove dirt from the reverse osmosis membrane filter element 2.

[0102] In another specific embodiment, the auxiliary cleaning component includes a bubble generator, which is capable of generating bubbles that promote the interaction of the cleaning fluid with the dirt on the reverse osmosis membrane filter element 2, thereby aiding in the removal of dirt.

[0103] Preferably, such as Figures 1 to 4 As shown, the water purification equipment of this utility model also includes a pre-filter unit 4, the water outlet of which is connected to the main water inlet 1.

[0104] With this setup, the purified water filtered by the pre-filter unit 4 can enter the first cleaning agent storage component 313, and the cleaning agent can be dissolved using the purified water filtered by the pre-filter unit 4, thereby improving the solubility of the cleaning agent and the cleanliness of the cleaning solution, thus effectively improving the cleaning effect of the reverse osmosis membrane filter element 2.

[0105] It should be noted that, in practical applications, those skilled in the art can set the pre-filter unit 4 as a pre-filter cartridge, or they can set the pre-filter unit 4 as a composite cartridge including a pre-filter cartridge and a post-filter cartridge, etc. Such adjustments and changes to the specific type of the pre-filter unit 4 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0106] Preferably, the pre-filter unit 4 is a pre-filter cartridge.

[0107] Preferably, such as Figures 1 to 4As shown, the water purification equipment also includes a pure water outlet pipe 5 and a pure water user component 51. The pure water user component 51 is connected to the pure water end of the reverse osmosis membrane filter element 2 through the pure water outlet pipe 5. The pure water user component 51 is used to output the water from the pure water end of the reverse osmosis membrane filter element 2 for users to drink.

[0108] It should be noted that, in practical applications, those skilled in the art can directly configure the pure water component 51 as a water outlet component (such as a faucet or spout), with the filtered pure water flowing out from the faucet or spout for user use. Alternatively, the pure water component 51 can be configured as a post-filter, with the filtered pure water flowing into the post-filter to improve the taste for user use. Or, the pure water component 51 can be configured as a pure water tank, with the pure water filtered by the reverse osmosis membrane filter 2 flowing into the pure water tank for storage for user use, and so on. Such adjustments and changes to the specific configuration of the pure water component 51 do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0109] Preferably, the pure water component 51 is a post-filter.

[0110] It should be noted that when cleaning the reverse osmosis membrane filter element 2, a small amount of cleaning agent will permeate through the membrane of the reverse osmosis membrane filter element 2 to the pure water end. Therefore, after cleaning, there will be a small amount of cleaning agent residue on the pure water end of the reverse osmosis membrane filter element 2. The residual cleaning agent needs to be discharged before it is used by the user.

[0111] The following two scenarios will be discussed in detail.

[0112] Scenario 1:

[0113] like Figure 1 and Figure 2 As shown, the water purification equipment also includes a return pipe 23 and a return valve 231. One end of the return pipe 23 is connected to the pure water outlet pipe 5, and the other end of the return pipe 23 is connected to the upstream end of the booster pump 12. The return valve 231 is installed on the return pipe 23 and is used to control the opening and closing of the return pipe 23.

[0114] With this setup, on the one hand, after cleaning the reverse osmosis membrane filter 2, the pure water containing detergent from the pure water end of the reverse osmosis membrane filter 2 can be discharged to the upstream end of the booster pump 12 for further filtration through the reverse osmosis membrane filter 2, thus removing any remaining small amount of detergent from the water purification equipment. This helps achieve zero additives and zero chemical pollution. On the other hand, when the water purification equipment is in normal water production mode and does not produce water for a long time, the reverse osmosis membrane filter 2 may experience an increase in the TDS value of the first cup of water. The "first cup of water" can also be returned to the upstream end of the booster pump 12 through the return pipe 23 to prevent users from drinking water with a high TDS value.

[0115] Scenario 2:

[0116] like Figure 3 and Figure 4 As shown, the water purification equipment also includes a drain pipe 22 and a drain valve 221. One end of the drain pipe 22 is connected to the pure water outlet pipe 5, and the other end is connected to the wastewater outlet pipe 21. The drain valve 221 is installed on the drain pipe 22 and is used to control the opening and closing of the drain pipe 22.

[0117] With this setup, after cleaning the reverse osmosis membrane filter element 2, first open the drain valve 221 to allow the water from the pure water end of the reverse osmosis membrane filter element 2 to flow into the wastewater outlet pipe 21 through the drain pipe 22. After the pure water containing the cleaning agent is completely discharged, close the drain valve 221 to allow the water from the pure water end of the reverse osmosis membrane filter element 2 to flow into the pure water water component 51 through the pure water outlet pipe 5. This allows residual cleaning agent to be discharged from the water purification equipment, helping to achieve zero additives and zero chemical pollution, and further improving the user experience.

[0118] Preferably, such as Figures 1 to 4 As shown, the water purification equipment also includes a wastewater valve 211 installed on the wastewater outlet pipe 21, which controls the pure waste ratio of the water purification equipment.

[0119] It should also be noted that although this utility model is described in the above two cases, it is not restrictive. For example, the other end of the drain pipe 22 can be directly connected to the drain pipe or the wastewater outlet of the water purification equipment, and the pure water containing detergent can be directly discharged to the drain pipe or the wastewater outlet of the water purification equipment.

[0120] Preferably, such as Figures 1 to 4 As shown, the water purification equipment of this utility model also includes an inlet valve 11 installed on the main inlet water line 1, which is used to control the opening and closing of the main inlet water line 1.

[0121] By setting the inlet valve 11, when the water purification equipment is in water production mode, the inlet valve 11 can be opened, allowing water filtered by the pre-filter to enter the reverse osmosis membrane filter element 2 through the main inlet channel 1 for filtration. When the water purification equipment is in cleaning mode, the inlet valve 11 can be opened, allowing water filtered by the pre-filter to enter the reverse osmosis membrane filter element 2 through the main inlet channel 1, flow into the wastewater end of the reverse osmosis membrane filter element 2, and then enter the first cleaning agent storage component 313 or the second cleaning agent storage component 323, facilitating the cleaning of the reverse osmosis membrane filter element 2.

[0122] It should be noted that, in practical applications, those skilled in the art can configure the water purification equipment as a water purifier, or as an integrated water purifier and drinking water machine, or as any other possible type, etc. Such adjustments and changes to the specific configuration type of the water purification equipment do not deviate from the principles and scope of this utility model and should all be included within the protection scope of this utility model.

[0123] For example, the water purification device is a water purifier.

[0124] The working process of water purification equipment will be described below in the following scenarios.

[0125] Scenario 1:

[0126] When the water purification equipment is in normal water production mode: the first cleaning valve 312 and the second cleaning valve 322 are closed, and the first cleaning agent storage component 313 is switched to the first working state, that is, the first cleaning agent storage component 313 allows water in the main water inlet 1 to enter the reverse osmosis membrane filter element 2, so as to feed water into the reverse osmosis membrane filter element 2. The water entering the reverse osmosis membrane filter element 2 is filtered by the reverse osmosis membrane filter element 2, and the pure water produced by filtration is output through the pure water outlet pipe 5 for user use. The wastewater produced by filtration flows out through the wastewater outlet pipe 5.

[0127] Scenario 2:

[0128] The cleaning mode of the reverse osmosis membrane filter element 2 using the first cleaning agent stored in the first cleaning agent storage component 313 is as follows: Open the water inlet valve 11, open the first cleaning valve 312, close the second cleaning valve 322, switch the first cleaning agent storage component 313 to the second working state, and the water in the main water inlet 1 enters the first cleaning agent storage component 313 to dissolve the first cleaning agent and form the first cleaning liquid. After the first cleaning liquid enters the reverse osmosis membrane filter element 2, it is then transported by the circulation pump 6 to the wastewater end of the reverse osmosis membrane filter element 2, the first cleaning pipe 311, the main water inlet 1, and the water inlet end of the reverse osmosis membrane filter element 2 in sequence, so that the first cleaning liquid circulates in the first cleaning circuit and effectively cleans the reverse osmosis membrane filter element 2. The dirt that is cleaned off flows out from the wastewater outlet pipe 21 with the first cleaning liquid.

[0129] Scenario 3:

[0130] The cleaning mode of the reverse osmosis membrane filter element 2 using the second cleaning agent stored in the second cleaning agent storage component 313 is as follows: Open the inlet valve 11, close the first cleaning valve 312, open the second cleaning valve 322, and switch the first cleaning agent storage component 313 to the first working state, that is, the first cleaning agent storage component 313 allows water in the main inlet channel 1 to enter the reverse osmosis membrane filter element 2 to feed water into the reverse osmosis membrane filter element 2. The water entering the reverse osmosis membrane filter element 2 flows through the wastewater end of the reverse osmosis membrane filter element 2 to the second cleaning pipe 321 (the reverse osmosis membrane filter element 2 does not produce water, and the water here is not the wastewater generated after filtration by the reverse osmosis membrane filter element 2). The second cleaning agent in the second cleaning agent storage component 323 is dissolved to form a second cleaning liquid. Then, the second cleaning liquid is transported to the inlet end of the reverse osmosis membrane filter element 2 by the circulation pump 6, so that the second cleaning liquid circulates in the second cleaning circuit to effectively clean the reverse osmosis membrane filter element 2. The dirt cleaned off flows out from the wastewater outlet pipe 21 with the second cleaning liquid.

[0131] Scenario 4:

[0132] Flushing mode: After cleaning the reverse osmosis membrane filter element 2 with the first or second cleaning agent, water is introduced into the reverse osmosis membrane filter element 2 through the main water inlet 1 to flush the reverse osmosis membrane filter element 2. The flushing wastewater flows out through the wastewater outlet pipe 21.

[0133] Scenario 5:

[0134] Discharge residual detergent: When cleaning the reverse osmosis membrane filter element 2, a small amount of detergent will seep into the pure water end of the reverse osmosis membrane filter element 2. After cleaning the reverse osmosis membrane filter element 2 with the first or second detergent and starting the water purification equipment in water production mode, open the reflux valve 231 or drain valve 221 to discharge the pure water containing a small amount of detergent from the pure water end of the reverse osmosis membrane filter element 2. This helps to achieve zero pollution and zero chemical addition.

[0135] Scenario 6:

[0136] Wastewater recirculation mode: When the water purification equipment is in normal water production mode, the flow rate of water flowing from the wastewater end of the reverse osmosis membrane filter element 2 to the water inlet end of the reverse osmosis membrane filter element 2 can be adjusted by adjusting the flow control component 7, so that part of the wastewater flows back to the water inlet end of the reverse osmosis membrane filter element 2 through the first cleaning pipe 321, thereby helping to improve the water recovery rate and reduce water waste.

[0137] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A water purification apparatus, characterized by comprising: The water purification device comprises: a reverse osmosis membrane filter core (2); a water inlet main path (1) in communication with a water inlet end of the reverse osmosis membrane filter core (2) to supply water to the reverse osmosis membrane filter core (2); a cleaning assembly comprising a first cleaning agent storage member (313) arranged on the water inlet main path (1) and a first cleaning pipe (311) having a water inlet end in communication with a wastewater end of the reverse osmosis membrane filter core (2) and a water outlet end in communication with the water inlet main path (1) so that the first cleaning agent storage member (313), the water inlet end of the reverse osmosis membrane filter core (2) and the wastewater end of the reverse osmosis membrane filter core (2) are sequentially communicated to form a first cleaning loop; and a circulating pump arranged on the first cleaning loop and capable of driving liquid in the first cleaning loop to circulate and flow; wherein the first cleaning agent storage member (313) is arranged to allow water in the water inlet main path (1) to enter the reverse osmosis membrane filter core (2) when it is in a first working state and to deliver cleaning liquid to the reverse osmosis membrane filter core (2) when it is in a second working state.

2. The water purification apparatus according to claim 1, characterized by The cleaning assembly further comprises a second cleaning pipe (321) and a second cleaning agent storage member (323) and a second cleaning valve (322) arranged on the second cleaning pipe (321), a water inlet end of the second cleaning pipe (321) is in communication with a wastewater end of the reverse osmosis membrane filter core (2), and a water outlet end of the second cleaning pipe (321) is in communication with a water inlet end of the reverse osmosis membrane filter core (2) so that the second cleaning agent storage member (323), the water inlet end of the reverse osmosis membrane filter core (2) and the wastewater end of the reverse osmosis membrane filter core (2) are sequentially communicated to form a second cleaning loop; wherein the circulating pump is further capable of driving liquid in the second cleaning loop to circulate and flow.

3. The water purification apparatus according to claim 2, characterized by The water inlet end of the first cleaning pipe (311) and the water inlet end of the second cleaning pipe (321) meet and are in communication with the wastewater end of the reverse osmosis membrane filter core (2) through a first connecting pipe (34), and the circulating pump (6) is arranged on the first connecting pipe (34) and capable of driving liquid in the first cleaning loop and / or the second cleaning loop to circulate and flow; Alternatively, the water outlet end of the first cleaning pipe (311) and the water outlet end of the second cleaning pipe (321) meet and are in communication with the water inlet main path (1) through a second connecting pipe (35), and the circulating pump (6) is arranged on the second connecting pipe (35) and capable of driving liquid in the first cleaning loop and / or the second cleaning loop to circulate and flow.

4. The water purification apparatus according to claim 3, characterized by The water purification device further comprises a protection member (9), wherein the protection member (9) is arranged on the first connecting pipe (34) and located at an upstream end of the circulating pump (6), and the protection member (9) is capable of resisting high pressure of the wastewater end of the reverse osmosis membrane filter core (2). Alternatively, the protection member (9) is arranged on the second connecting pipe (35) at the downstream end of the circulating pump (6), and can resist high pressure in the water inlet main path (1).

5. The water purification apparatus according to claim 3, characterized by The water purification device further comprises a booster pump (12) arranged on the water inlet main path (1), and the booster pump (12) is arranged at the upstream end of the second connecting pipe (35).

6. The water purification apparatus according to claim 2, wherein The cleaning assembly further comprises a one-way valve (33) arranged at the downstream end of the second cleaning agent storage member (323), and the one-way valve (33) can prevent water in the water inlet main path (1) from entering the second cleaning agent storage member (323).

7. The water purification apparatus according to claim 2, characterized by The water purification device further comprises a flow control member (7) arranged on the first cleaning pipe (311) and / or the second cleaning pipe (321). And / or, the water purification device further comprises a dirt collection member (8) for collecting dirt in the first cleaning circuit and / or the second cleaning circuit.

8. The water purification apparatus of claim 1, wherein The first cleaning agent storage member (313) comprises a shell (3131) having a cavity (3132) therein, and a cleaning agent pouring port (3133) is arranged on the shell (3131) and communicates with the cavity (3132), and the pouring port (3133) can be used to pour cleaning agent into the cavity (3132) when the first cleaning agent storage member (313) is in a second working state. Alternatively, the first cleaning agent storage member (313) comprises a shell (3131) having a water passage (3135) and a cavity (3132) therein, and the cavity (3132) has an opening (3136), and a blocking member (3134) is arranged at the opening (3136) and can open or close the opening (3136).

9. The water purification apparatus of claim 1, wherein The water purification device further comprises an auxiliary cleaning member arranged to facilitate the action of the cleaning liquid on the dirt on the reverse osmosis membrane filter core (2) so as to remove the dirt from the reverse osmosis membrane filter core (2). And / or, the water purification device further comprises a pre-filter unit (4), and a water outlet of the pre-filter unit (4) communicates with a first end of the water inlet main path (1). And / or, the water purification device further comprises a pure water outlet pipe (5) and a pure water water member (51), and a pure water end of the reverse osmosis membrane filter core (2) communicates with the pure water water member (51) through the pure water outlet pipe (5).

10. The water purification apparatus of claim 1, wherein The water purification device further comprises a backflow pipe (23) and a backflow valve (231), one end of the backflow pipe (23) communicates with the pure water end of the reverse osmosis membrane filter core (2), the other end of the backflow pipe (23) communicates with the water inlet main path (1), and the backflow valve (231) is arranged on the backflow pipe (23) and is used to control the opening and closing of the backflow pipe (23). Alternatively, the water purification device further comprises a drain pipe (22) and a drain valve (221), one end of the drain pipe (22) is communicated with the pure water outlet pipe (5), the other end of the drain pipe (22) is communicated with the waste water outlet pipe (21) of the water purification device, and the drain valve (221) is arranged on the drain pipe (22) and used for controlling the on-off of the drain pipe (22).

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