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 experience of a user is influenced due to the fact that the existing water purification equipment is relatively large in size. The water purification equipment comprises a reverse osmosis membrane filter element, a pure water component, a filter element mounting structure, a front-back composite filter element and a cleaning module, the filter element mounting structure is provided with a first connector, a second connector, a third connector and a fourth connector, the first connector is connected to a water source, and the second connector is communicated with the water inlet end of the reverse osmosis membrane filter element; the third connector is communicated with the pure water end of the reverse osmosis membrane filter element, and the fourth connector can be selectively communicated with the pure water component or the water inlet end of the reverse osmosis membrane filter element; the front and rear composite filter elements and the cleaning module can be selectively mounted on the filter element mounting structure. According to the water purification equipment, the cleaning module can replace the front and rear composite filter element, so that the reverse osmosis membrane filter element is cleaned by adopting the first cleaning agent and the second cleaning agent, the size of the water purification equipment is reduced, and the use experience of a user is improved.

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 systems such as water purifiers and water dispensers are gradually becoming essential drinking water facilities in people's daily lives.

[0003] After prolonged use, dirt and grime can accumulate inside the reverse osmosis membrane filter element, affecting the water production rate and thus the lifespan of the filter element. Cleaning the reverse osmosis membrane filter element with a detergent after a period of use can remove this dirt and grime, extending its lifespan.

[0004] Existing water purification equipment requires a cleaning module inside the casing to clean the reverse osmosis membrane filter, resulting in a large size and installation space, leading to a poor 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 at least a certain extent solve the problem that the existing water purification equipment is large in size due to the need to set a cleaning module in the casing, which affects the user experience.

[0006] In a first aspect, the present invention provides a water purification device, comprising: a reverse osmosis membrane filter element; a pure water supply component for outputting filtered water for user drinking; a pre- and post-filter composite element; and a filter element mounting structure having a first interface, a second interface, a third interface, and a fourth interface, wherein the first interface is connected to a water source, the second interface is connected to the inlet end of the reverse osmosis membrane filter element, the third interface is connected to the pure water end of the reverse osmosis membrane filter element, and the fourth interface is selectively connected to the pure water supply component or the inlet end of the reverse osmosis membrane filter element. The cleaning module has a first cleaning inlet, a first cleaning outlet, a second cleaning inlet, and a second cleaning outlet that are respectively adapted to the first interface, the second interface, the third interface, and the fourth interface. The cleaning module has a first cavity for storing a first cleaning agent and a second cavity for storing a second cleaning agent. The first cleaning inlet and the first cleaning outlet are both connected to the first cavity, and the second cleaning inlet and the second cleaning outlet are both connected to the second cavity. The pre- and post-filter composite cartridges and the cleaning module can be selectively installed on the filter cartridge mounting structure.

[0007] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes an outlet pipe, an outlet valve, a return pipe, and a return valve. The first end of the outlet pipe is connected to the fourth interface, the second end of the outlet pipe is connected to the pure water component, the first end of the return pipe and the first end of the return pipe are both connected to the outlet pipe, the second end of the return pipe is connected to the inlet end of the reverse osmosis membrane filter element, the outlet valve is installed on the outlet pipe and is used to control the opening and closing of the outlet pipe, and the return valve is installed on the return pipe and is used to control the opening and closing of the return pipe; or, the water purification equipment further includes an outlet pipe, a return pipe, and a reversing valve. The first end of the reversing valve is connected to the fourth interface, the second end of the reversing valve is connected to the pure water component through the outlet pipe, the third end of the reversing valve is connected to the inlet end of the reverse osmosis membrane filter element through the return pipe, and the first end of the reversing valve can selectively connect to the second end or the third end of the reversing valve.

[0008] In the preferred embodiment of the above-mentioned water purification equipment, the cleaning module includes a housing and a partition member disposed within the housing, the partition member dividing the space within the housing into a first cavity and a second cavity; and / or, the first cleaning agent and / or the second cleaning agent is at least one of an acidic cleaning agent, an alkaline cleaning agent, or an oxidizing cleaning agent.

[0009] In the preferred embodiment of the above-mentioned water purification equipment, the separating member is an annular structure, and a first cavity is formed between the separating member and the shell, and a second cavity is formed inside the separating member; or, a second cavity is formed between the separating member and the shell, and the first cavity is formed inside the separating member.

[0010] In the preferred embodiment of the above-mentioned water purification equipment, the partition member is a plate-shaped structure disposed within the housing, and the first cavity and the second cavity are respectively located on both sides of the partition member.

[0011] In the preferred embodiment of the above-mentioned water purification equipment, the pre- and post-filter composite cartridge includes a housing and a first filter unit and a second filter unit disposed within the housing. The housing is provided with a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet is connected to the inlet end of the first filter unit, the first outlet is connected to the outlet end of the first filter unit, the second inlet is connected to the inlet end of the second filter unit, and the second outlet is connected to the outlet end of the second filter unit. The first filter unit is a pre-filter unit, and the second filter unit is a post-filter unit or a mineralization unit.

[0012] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a circulation pipe, wherein: the first end of the circulation pipe is connected to the wastewater end of the reverse osmosis membrane filter element, and the second end of the circulation pipe is connected to the inlet end of the reverse osmosis membrane filter element, so that the inlet end of the reverse osmosis membrane filter element and the wastewater end of the reverse osmosis membrane filter element are connected to form a cleaning loop; or, the first end of the circulation pipe is connected to the wastewater end of the reverse osmosis membrane filter element, and the second end of the circulation pipe is connected to the first interface, so that the cleaning module, 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 cleaning loop, and the water purification equipment is configured to drive the liquid circulation flow within the cleaning loop.

[0013] In the preferred embodiment of the above-mentioned water purification equipment, the second end of the circulation pipe is connected to the main water inlet and is located upstream of the booster pump of the water purification equipment, and the booster pump can drive the liquid circulation flow in the cleaning circuit; or, the water purification equipment further includes a circulation pump, which is installed on the cleaning circuit and can drive the liquid circulation flow in the cleaning circuit.

[0014] In the preferred embodiment of the above-mentioned water purification equipment, the booster pump includes at least a first voltage level and a second voltage level. The booster pump has a level adjustment module, which is used to adjust the voltage level of the booster pump to the second voltage level when the water purification equipment is in cleaning mode. The voltage value of the second voltage level is lower than the voltage value of the first voltage level.

[0015] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a water purification pipe and a water purification outlet valve disposed on the water purification pipe. The water purification pipe is connected to the second interface and is used to output water filtered by the first filtration unit of the pre- and post-filter composite cartridges. The water purification outlet valve is used to control the opening and closing of the water purification pipe. Alternatively, the water purification equipment further includes a main water inlet, the second interface is connected to the water inlet end of the reverse osmosis membrane cartridge through the main water inlet, the booster pump of the water purification equipment is disposed on the main water inlet, and the fourth interface can selectively connect to the main water inlet or the pure water component.

[0016] When adopting the above-mentioned preferred technical solution, by setting up a filter cartridge installation structure, pre- and post-filter composite cartridges, and a cleaning module, when the water purification equipment is in normal water production mode, the pre- and post-filter composite cartridges can be installed on the filter cartridge installation structure, thereby facilitating the filtration of water by the first and second filtration units. When the water purification equipment is in cleaning mode, the pre- and post-filter composite cartridges can be removed from the filter cartridge installation structure, and the cleaning module can be installed on the filter cartridge installation structure, thereby facilitating the cleaning of the reverse osmosis membrane cartridge with the first and / or second cleaning agents, extending the service life of the reverse osmosis membrane cartridge. At the same time, since the cleaning module can replace the pre- and post-filter composite cartridges to clean the reverse osmosis membrane cartridge, there is no need to install the cleaning module inside the casing of the water purification equipment, which can greatly reduce the size of the water purification equipment, save installation space, and greatly improve the user experience.

[0017] Furthermore, by setting up a circulation pipe, the inlet end and the wastewater end of the reverse osmosis membrane filter element can be connected to form a cleaning loop. When the water purification equipment cleans the reverse osmosis membrane filter element, the cleaning agent can be used to circulate and flush the reverse osmosis membrane filter element, which can greatly improve the cleaning effect and cleaning efficiency. Compared with the form of connecting the second end of the circulation pipe to the inlet end of the reverse osmosis membrane filter element, setting the second end of the circulation pump to be connected to the first interface can ensure that all the cleaning agent in the first or second chamber is delivered to the cleaning loop to circulate and clean the reverse osmosis membrane filter element, thereby increasing the concentration of the cleaning solution and improving the cleaning effect on the reverse osmosis membrane filter element.

[0018] Furthermore, by using a booster pump to drive the liquid circulation within the cleaning circuit, the booster pump integrated into the water purifier can be used directly to drive the liquid circulation within the cleaning circuit, thus avoiding the need for a separate circulation pump. This results in a smaller and lower-cost water purifier, which helps save installation space and further enhances the user experience.

[0019] Furthermore, by setting the booster pump to include at least a first voltage level and a second voltage level, when the water purification equipment is in cleaning mode, the booster pump can operate at a lower voltage level, resulting in lower water pressure of the cleaning solution during circulation. On the one hand, this reduces the amount of cleaning solution penetrating to the pure water end of the reverse osmosis membrane filter element, reducing chemical residues. On the other hand, it also reduces the damage caused by the cleaning solution to the diaphragm inside the booster pump.

[0020] Furthermore, compared to using a booster pump to drive the liquid circulation within the cleaning circuit, using a circulation pump to drive the liquid circulation within the cleaning circuit avoids the need for a booster pump to drive the cleaning fluid circulation within the cleaning circuit. On the one hand, this reduces the damage caused by the cleaning fluid to the diaphragm within the booster pump, thereby extending the booster pump's service life. On the other hand, since there is no high pressure, it reduces the amount of cleaning fluid that permeates to the pure water end of the reverse osmosis membrane filter element, which not only reduces chemical residues but also reduces damage to the membrane sheets of the reverse osmosis membrane filter element.

[0021] Furthermore, by installing a water purification pipe, the purified water filtered by the first filtration unit can be output for user use, thus enabling the water purification equipment to have a dual water output mode and further enhancing the user experience. Attached Figure Description

[0022] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure of one embodiment of the water purification device of this utility model;

[0024] Figure 2 This is a schematic diagram of another embodiment of the water purification device of this utility model;

[0025] Figure 3 This is a structural schematic diagram of another embodiment of the water purification device of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of one possible embodiment of the water purification device of this utility model;

[0027] Figure 5 This is a schematic diagram of another possible embodiment of the water purification device of this utility model;

[0028] Figure 6 This is a schematic diagram of another possible embodiment of the water purification device of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the front and rear composite filter element of this utility model;

[0030] Figure 8 yes Figure 7 sectional view along line AA;

[0031] Figure 9 This is a schematic diagram of the cleaning module of this utility model. Figure 1 ;

[0032] Figure 10 yes Figure 9A cross-sectional view along line BB, showing a cross-sectional view of embodiment one of the cleaning module;

[0033] Figure 11 This is a schematic diagram of the cleaning module of this utility model. Figure 2 ;

[0034] Figure 12 yes Figure 11 A cross-sectional view along the CC line, showing a cross-sectional view of a first embodiment of the cleaning module;

[0035] Figure 13 yes Figure 9 A cross-sectional view along line BB, showing a cross-sectional view of embodiment two of the cleaning module;

[0036] Figure 14 yes Figure 9 The cross-sectional view along line BB shows a cross-sectional view of embodiment three of the cleaning module.

[0037] List of reference numerals in the attached diagram:

[0038] 1. Filter cartridge installation structure; 11. First interface; 12. Second interface; 13. Third interface; 14. Fourth interface; 2. Reverse osmosis membrane filter cartridge; 21. Wastewater outlet pipe; 211. Wastewater valve; 3. Pre- and post-filter composite cartridge; 30. Housing; 31. First filtration unit; 311. First inlet; 312. First outlet; 32. Second filtration unit; 321. Second inlet; 322. Second outlet; 4. Cleaning module; 40. Housing; 41. First cavity; 411. First cleaning inlet; 412. First cleaning outlet; 413. 42. First cleaning agent; 42. Second cavity; 421. Second cleaning inlet; 422. Second cleaning outlet; 423. Second cleaning agent; 43. Separating component; 51. Water inlet pipe; 52. Main water inlet; 521. Water inlet valve; 53. Pure water pipe; 531. First control valve; 54. Water outlet pipe; 541. Water outlet valve; 55. Return pipe; 551. Return valve; 56. Clean water pipe; 561. Clean water outlet valve; 6. Circulation pipe; 61. Circulation pump; 62. Second control valve; 63. Check valve; 7. Booster pump; 8. Pure water usage component; 9. Reversing valve. Detailed Implementation

[0039] 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.

[0040] 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 relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] 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.

[0042] like Figures 1 to 6 As shown, the water purification equipment of this utility model includes a reverse osmosis membrane filter element 2, a pure water component 8, a filter element installation structure 1, a pre- and post-composite filter element 3, and a cleaning module 4. The pre- and post-composite filter element 3 and the cleaning module 4 can be selectively installed on the filter element installation structure 1.

[0043] The filter element installation structure 1 has a first interface 11, a second interface 12, a third interface 13 and a fourth interface 14. The first interface 11 is connected to a water source, the second interface 12 can be connected to the water inlet of the reverse osmosis membrane filter element 2, the third interface 13 can be connected to the pure water end of the reverse osmosis membrane filter element 2, and the fourth interface 14 can be selectively connected to the pure water component 8 or the water inlet of the reverse osmosis membrane filter element 2.

[0044] like Figure 7 and Figure 8 As shown, the pre- and post-filter composite element 3 has a first inlet 311 adapted to the first interface 11, a first outlet 312 adapted to the second interface 12, a second inlet 321 adapted to the third interface 13, and a second outlet 322 adapted to the fourth interface 14. The pre- and post-filter composite element 3 is provided with a first filter unit 31 and a second filter unit 32. The first inlet 311 is connected to the inlet end of the first filter unit 31, the first outlet 312 is connected to the outlet end of the first filter unit 31, the second inlet 321 is connected to the inlet end of the second filter unit 32, and the second outlet 322 is connected to the outlet end of the second filter unit 32.

[0045] It should be noted that, Figure 8The example shown is merely one of the pre- and post-filter composite elements 3. Any other possible pre- and post-filter composite elements 3 do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model.

[0046] like Figures 9 to 14 As shown, the cleaning module 4 has a first cleaning inlet 411 adapted to the first interface 11, a first cleaning outlet 412 adapted to the second interface 12, a second cleaning inlet 421 adapted to the third interface 13, and a second cleaning outlet 422 adapted to the fourth interface 14. The cleaning module 4 is provided with a first cavity 41 and a second cavity 42. The first cavity 41 is used to store the first cleaning agent 413, and the first cleaning inlet 411 and the first cleaning outlet 412 are both connected to the first cavity 41. The second cavity 42 is used to store the second cleaning agent 423, and the second cleaning inlet 421 and the second cleaning outlet 422 are both connected to the second cavity 42.

[0047] With this setup, when the water purifier is in normal water production mode, the pre- and post-filter composite cartridges 3 can be installed on the cartridge mounting structure 1, facilitating water filtration by the first filtration unit 31 and the second filtration unit 32. When the water purifier is in cleaning mode, the pre- and post-filter composite cartridges 3 can be removed from the cartridge mounting structure 1, and the cleaning module 4 can be installed on the cartridge mounting structure 1. This facilitates cleaning of the reverse osmosis membrane cartridge 2 using the first cleaning agent 413 and / or the second cleaning agent 423, extending the service life of the reverse osmosis membrane cartridge 2. Furthermore, since the cleaning module 4 can replace the pre- and post-filter composite cartridges 3 to clean the reverse osmosis membrane cartridge 2, there is no need to install a cleaning module inside the water purifier's casing, reducing the size of the water purifier, saving installation space, and greatly improving the user experience.

[0048] It should be noted that the cleaning module 4 of this utility model has a first cavity 41 for storing the first cleaning agent 413 and a second cavity 42 for storing the second cleaning agent 423. It can use different types of cleaning agents to clean the reverse osmosis membrane filter element 2, thereby enabling the selection of a suitable cleaning agent according to the type of dirt on the reverse osmosis membrane filter element 2. Compared with the form of cleaning the reverse osmosis membrane filter element 2 with only one cleaning agent, this application can improve the cleaning effect of the reverse osmosis membrane filter element 2.

[0049] It should also be noted that, in practical applications, this utility model does not limit the specific type of the pure water component 8. For example, the pure water component 8 can be set as a faucet or water outlet, that is, directly outputting pure water filtered by the second filter unit 32 for users to drink. Alternatively, the pure water component 8 can be set as a pure water tank, that is, storing the pure water filtered by the second filter unit 32 in the pure water tank for users to drink. Or, the pure water component 8 can be set as a conveying pipeline, directly conveying the pure water filtered by the second filter unit 32 to the outside of the water purification equipment through the conveying pipeline, etc. Such adjustments and changes to the specific setting type of the pure water component 8 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.

[0050] For example, such as Figures 1 to 6 As shown, component 8 for pure water use is a faucet.

[0051] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific connection method by which the fourth interface 14 can selectively connect with the inlet end of the pure water component 8 or the reverse osmosis membrane filter element 2, as long as the fourth interface 14 can selectively connect with the inlet end of the pure water component 8 or the reverse osmosis membrane filter element 2.

[0052] In one specific embodiment, such as Figure 1 , Figures 3 to 6 As shown, the water purification equipment also includes an outlet pipe 54, an outlet valve 541, a return pipe 55, and a return valve 551. The first end of the outlet pipe 54 and the first end of the return pipe 55 can be connected to the fourth interface 14. The second end of the outlet pipe 54 is connected to the pure water component 8. The second end of the return pipe 55 is connected to the inlet end of the reverse osmosis membrane filter element 2. The return valve 551 is installed on the return pipe 55 and is used to control the opening and closing of the return pipe 55.

[0053] In another specific embodiment, such as Figure 2 As shown, the water purification equipment also includes an outlet pipe 54, a return pipe 55, and a reversing valve 9. The first end of the reversing valve 9 is connected to the fourth interface 14, the second end of the reversing valve 9 is connected to the pure water component 8 through the outlet pipe 54, and the third end of the reversing valve 9 is connected to the inlet end of the reverse osmosis membrane filter element 2 through the return pipe 55. The first end of the reversing valve 9 can be selectively connected to the second end or the third end of the reversing valve 9.

[0054] It should be noted that although this utility model is described with reference to the two embodiments described above, it is not restrictive, and any other possible forms do not depart from the principles and scope of this utility model.

[0055] It should also be noted that when the water purification equipment is not used for a long time, the water with a high TDS value at the pure water end of the reverse osmosis membrane filter element can be returned to the inlet end of the reverse osmosis membrane filter element 2 through the return pipe 55, thus solving the problem of a high TDS value in the "first cup of water".

[0056] It should be noted that, in practical applications, this utility model does not limit the specific configuration type of the cleaning module 4. For example, the cleaning module 4 can be configured to include a housing 40 and a first box and a second box disposed within the housing 40, with a first cavity 41 formed within the first box and a second cavity 42 formed within the second box. Alternatively, the cleaning module 4 can be configured to include a housing 40 and a partition member 43 disposed within the housing, with the partition member 43 dividing the space within the housing 40 into a first cavity 41 and a second cavity 42, and so on. Such adjustments and changes to the specific configuration type of the cleaning module 4 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.

[0057] Preferably, such as Figures 9 to 14 As shown, the cleaning module 4 includes a housing 40 and a partition member 43 disposed within the housing 40. The partition member 43 divides the space within the housing 40 into a first cavity 41 and a second cavity 42.

[0058] It should be noted that, in practical applications, those skilled in the art do not impose any restrictions on the specific shape of the partition member 43, as long as it can divide the space inside the housing 40 into mutually independent first cavity 41 and second cavity 42.

[0059] The cleaning module 4 of this utility model will be described below with reference to the following two embodiments.

[0060] Example 1:

[0061] like Figures 9 to 12 As shown, the partition member 43 has a ring structure, and a first cavity 41 is formed between the partition member 43 and the shell 40, and a second cavity 42 is formed inside the partition member 43.

[0062] It should be noted that the invention is not limited to forming a first cavity 41 between the partition member 43 and the housing 40, and forming a second cavity 42 within the partition member 43. For example, it is also possible to form a second cavity 42 between the partition member 43 and the housing 40, and form a first cavity 41 within the partition member 43, etc. Such adjustments and changes to the relative positions of the first cavity 41 and the second cavity 42 do not deviate from the principles and scope of this invention, and should all be included within the protection scope of this invention.

[0063] Preferably, a first cavity 41 is formed between the partition member 43 and the housing 40, and a second cavity 42 is formed inside the partition member 43.

[0064] It should be noted that those skilled in the art can set the cross-sections of the housing 40 and the partition member 43 to be circular, or they can set the cross-sections of the housing 40 and the partition member 43 to be square, or they can set the cross-sections of the housing 40 and the partition member 43 to any other possible shape, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model.

[0065] Preferably, the cross-sections of the housing 40 and the partition member 43 are both circular.

[0066] Example 2:

[0067] like Figure 13 and 14 As shown, the partition member 43 is a plate-shaped structure disposed within the housing 40, and the first cavity 41 and the second cavity 42 are located on both sides of the partition member 43, respectively.

[0068] It should be noted that, in practical applications, those skilled in the art can arrange the partition member 43 parallel to the central axis of the housing 40, with the first cavity 41 and the second cavity 42 spaced apart in the horizontal direction; alternatively, the partition member 43 can be arranged perpendicular to the central axis of the housing 40, with the first cavity 41 and the second cavity 42 spaced apart in the vertical direction; or alternatively, the partition member 43 can be arranged obliquely to the central axis of the housing 40, etc. Such adjustments and changes to the relative positions of the first cavity 41 and the second cavity 42 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.

[0069] For example, such as Figure 13 As shown, the partition member 43 is arranged perpendicular to the central axis of the housing 40, and the first cavity 41 and the second cavity 42 are distributed at intervals along the vertical direction.

[0070] For example, such as Figure 14 As shown, the partition member 43 is arranged parallel to the central axis of the housing 40, and the first cavity 41 and the second cavity 42 are distributed at intervals along the horizontal direction.

[0071] It should be noted that although the cleaning module 4 of this utility model is described using the above two embodiments, this is not restrictive. Any other possible structures do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model.

[0072] It should also be noted that, in practical applications, this utility model does not impose any limitations on the type of cleaning agent in the first and second cleaning agent storage components. For example, the cleaning agent can be set to an acidic cleaning agent, or an alkaline cleaning agent, or 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.

[0073] Preferably, the first cleaning agent storage component is used to store acidic cleaning agents, and the second cleaning agent storage component is used to store alkaline cleaning agents.

[0074] 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 cleaning agents, and those skilled in the art can make adjustments according to actual needs.

[0075] 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 in the reverse osmosis membrane filter element.

[0076] 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 cleaning agents, and those skilled in the art can make adjustments according to actual needs.

[0077] Preferably, the first filtering unit 31 is a pre-filtering unit.

[0078] It should also be noted that those skilled in the art do not impose any limitations on the specific configuration type of the first filter unit 31. For example, the first filter unit 31 can be configured as PP cotton, or as a multi-layer filter, or as any other possible form, etc. Such adjustments and changes to the specific configuration type of the first filter unit 31 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0079] Preferably, the first filter unit 31 is made of PP cotton.

[0080] It should be noted that those skilled in the art do not impose any limitations on the specific configuration type of the second filter unit 32. The second filter unit 32 can be configured as a post-filter unit such as activated carbon, which can remove residual odors, residual chlorine and small amounts of organic matter in the water. Alternatively, the second filter unit 32 can be configured as a mineralization unit, which can add minerals or trace elements to the purified water, etc. Such adjustments and changes to the specific configuration type of the pre- and post-filter composite cartridge 3 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0081] Preferably, the second filtration unit 32 is a post-filtration unit, which can remove residual odors, residual chlorine and small amounts of organic matter from the water, thereby improving the taste of the water.

[0082] More preferably, the pre- and post-composite filter element 3 is a PCB filter element.

[0083] It should also be noted that, in practical applications, those skilled in the art can arrange the first interface 11, the second interface 12, the third interface 13, and the fourth interface 14 all on the same side of the filter element mounting structure 1. Correspondingly, the first cleaning inlet 411, the first cleaning outlet 412, the second cleaning inlet 421, and the second cleaning outlet 422 are all located on the same side of the housing 40, and the first water inlet 311, the first water outlet 312, the second water inlet 321, and the second water outlet 322 are all located on the same side of the outer shell 30. Alternatively, the first interface 11 can also be arranged on the same side of the outer shell 30. The second interface 12, the third interface 13, and the fourth interface 14 are located on different sides of the filter element mounting structure 1. Correspondingly, the first cleaning inlet 411, the first cleaning outlet 412, the second cleaning inlet 421, and the second cleaning outlet 422 are also located on different sides of the housing 40. The first water inlet 311, the first water outlet 312, the second water inlet 321, and the second water outlet 322 are located on different sides of the outer shell 30, etc. Such flexible adjustments and changes 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.

[0084] Preferably, such as Figures 1 to 6 , Figure 8 , Figures 10 to 11 , Figures 13 to 14 As shown, the first interface 11, the second interface 12, the third interface 13 and the fourth interface 14 are all located on the same side of the filter element mounting structure 1. Correspondingly, the first cleaning inlet 411, the first cleaning outlet 412, the second cleaning inlet 421 and the second cleaning outlet 422 are all located on the same side of the housing 40. The first water inlet 311, the first water outlet 312, the second water inlet 321 and the second water outlet 322 are all located on the same side of the outer shell 30.

[0085] It should be noted that in practical applications, this utility model does not limit the specific connection method of the first interface 11 to the water source. For example, the first interface 11 can be set to be connected to a tap water pipe, or the first interface 11 can be set to be connected to a water storage tank, 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.

[0086] Preferably, such as Figures 1 to 6 As shown, the first interface 11 is connected to the tap water pipe through the water inlet pipe 51.

[0087] It should be noted that, in practical applications, those skilled in the art can configure the second interface 12 to connect with the inlet end of the reverse osmosis membrane filter element 2 through the inlet channel, or the second interface 12 can be configured to connect with the inlet end of the reverse osmosis membrane filter element 2 through the main inlet channel 52, 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.

[0088] Preferably, such as Figures 1 to 6 As shown, the water purification equipment of this utility model also includes a main water inlet 52, a second interface 12 connected to the water inlet end of the reverse osmosis membrane filter element 2 through the main water inlet 52, a booster pump 7 of the water purification equipment is installed on the main water inlet 52, and a fourth interface 14 can selectively connect to the main water inlet 52 or the pure water component 8.

[0089] Specifically, such as Figures 1 to 6 As shown, the fourth interface 14 is connected to the pure water component 8 through the water outlet pipe 54, and the fourth interface 14 is connected to the main water inlet 52 through the return pipe 55.

[0090] It should be noted that the fourth interface 14 is not limited to being connected to the main inlet water line 52 via the return pipe 55. For example, the reverse osmosis membrane filter element 2 can also be configured to have two inlets, with the second interface 12 connected to one of the inlets via the main inlet water line 52, and the second end of the return pipe 55 connected to the other inlet, etc. Such flexible adjustments and changes 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. Of course, it is preferable to configure the fourth interface 14 to be connected to the main inlet water line 52 via the return pipe 55.

[0091] It should also be noted that, in practical applications, those skilled in the art can configure the second end of the return pipe 55 to be connected to the upstream end of the booster pump 7, or the second end of the return pipe 55 to be connected to the downstream end of the booster pump 7, etc. Such adjustments and changes to the specific configuration positions of the second end of the return pipe 55 and the booster pump 7 on the main water inlet 52 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.

[0092] Preferably, such as Figures 1 to 4 As shown, the second end of the return pipe 55 is connected to the upstream end of the booster pump 7, so that the liquid in the return pipe 55 can be transported to the reverse osmosis membrane filter element 2 by the booster pump 7.

[0093] It should be noted that, in practical applications, those skilled in the art can configure the third interface 13 to be connected to the pure water end of the reverse osmosis membrane filter element 2 through the pure water flow channel, or the third interface 13 can be configured to be connected to the pure water end of the reverse osmosis membrane filter element 2 through the pure water pipe 53, 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.

[0094] Preferably, such as Figures 1 to 6 As shown, the third interface 13 is connected to the pure water end of the reverse osmosis membrane filter element 2 through the pure water pipe 53.

[0095] Preferably, such as Figures 1 to 6 As shown, a first control valve 531 is installed on the pure water pipe 53, which is used to control the opening and closing of the pure water pipe 53.

[0096] By setting the first control valve 531, when the first cleaning agent 413 is used to clean the reverse osmosis membrane filter element 2, water in the pure water pipe 53 can be prevented from flowing into the second chamber 42, thereby dissolving the second cleaning agent 423 in the second chamber 42.

[0097] It should be noted that this utility model does not limit the cleaning method of the cleaning module 4 on the reverse osmosis membrane filter element 2. For example, the cleaning solution can be directly delivered into the reverse osmosis membrane filter element 2 to soak it and remove the dirt on the reverse osmosis membrane filter element 2. Alternatively, the cleaning solution can be delivered into the reverse osmosis membrane filter element 2 and then circulated within the reverse osmosis membrane filter element 2 to remove the dirt on the reverse osmosis membrane filter element 2. Such adjustments and changes to the cleaning method of the cleaning module 4 on the reverse osmosis membrane filter element 2 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0098] Preferably, the water purification equipment also includes a circulation pipe 6, which delivers the cleaning solution into the reverse osmosis membrane filter element 2 and then circulates the cleaning solution within the reverse osmosis membrane filter element 2 to remove dirt from the reverse osmosis membrane filter element 2.

[0099] The following two scenarios will be discussed in detail.

[0100] Scenario 1:

[0101] Preferably, such as Figure 3 and Figure 4 As shown, the water purification equipment also includes a circulation pipe 6. The first end of the circulation pipe 6 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 6 is connected to the inlet end of the reverse osmosis membrane filter element 2, so that the inlet end and the wastewater end of the reverse osmosis membrane filter element 2 are connected to form a cleaning circuit. The water purification equipment is configured to drive the liquid circulation flow in the cleaning circuit.

[0102] With this setup, namely by setting up the circulation pipe 6, the inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 can be connected to form a cleaning circuit. When the water purification equipment cleans the reverse osmosis membrane filter element 2, the cleaning agent can be used to circulate and flush the reverse osmosis membrane filter element 2, which can greatly improve the cleaning effect and cleaning efficiency.

[0103] It should be noted that when the water purification equipment is in flushing mode, the circulation pipe 6 can cause the water from the wastewater end of the reverse osmosis membrane filter element 2 to flow to the inlet end of the reverse osmosis membrane filter element 2, thereby circulating and flushing the reverse osmosis membrane filter element 2 and improving the flushing effect.

[0104] Scenario 2:

[0105] Preferably, such as Figure 5 and Figure 6 As shown, the water purification equipment also includes a circulation pipe 6. The first end of the circulation pipe 6 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 6 is connected to the first interface 11, so that the cleaning module 4, the inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning circuit. The water purification equipment is configured to drive the liquid circulation flow in the cleaning circuit.

[0106] With this configuration, compared to connecting the second end of the circulation pipe 6 to the inlet end of the reverse osmosis membrane filter element 2, setting the second end of the circulation pump 6 to connect to the first interface 11 allows all the cleaning agent in the first chamber 41 or the second chamber 42 to be delivered to the cleaning circuit to circulate and clean the reverse osmosis membrane filter element 2, thereby increasing the concentration of the cleaning solution and improving the cleaning effect on the reverse osmosis membrane filter element 2.

[0107] It should be noted that when the water purification equipment is in flushing mode, the pre- and post-filter composite cartridge 3 is installed on the cartridge installation structure 1. The circulation pipe 6 enables the wastewater from the reverse osmosis membrane cartridge 2 to flow to the first interface 11, and then into the first filtration unit 31 of the pre- and post-filter composite cartridge 3. The first filtration unit 31 can intercept the dirt flushed down and can circulate and flush the reverse osmosis membrane cartridge 2, thereby improving the flushing effect.

[0108] It should be noted that, in practical applications, this invention does not impose any limitations on the driving method for the circulation of liquid within the cleaning circuit, as long as it can drive the circulation of liquid within the cleaning circuit.

[0109] In one specific embodiment, such as Figure 4 and Figure 5 As shown, the second end of the circulation pipe 6 is connected to the main water inlet 52 and is located upstream of the booster pump 7. The booster pump 7 can drive the liquid circulation flow in the cleaning circuit.

[0110] With this setup, where the booster pump 7 drives the liquid circulation within the cleaning circuit, the booster pump 7 built into the water purifier can be used directly to drive the liquid circulation within the cleaning circuit, thus avoiding the need for a separate circulation pump 61. This results in a smaller and lower-cost water purifier, saves installation space, and further enhances the user experience.

[0111] It should be noted that, in practical applications, those skilled in the art can configure the booster pump 7 to have only one voltage level, or the booster pump 7 can be configured to have at least two voltage levels, and the booster pump 7 has a level adjustment module. The level adjustment module is used to adjust the voltage level of the booster pump 7 to the second voltage level when the water purification equipment is in the cleaning mode, wherein the voltage value of the second voltage level is lower than the voltage value of the first voltage level, etc. Such adjustments and changes to the specific configuration type of the booster pump 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.

[0112] Preferably, the booster pump 7 includes at least a first voltage level and a second voltage level. The booster pump 7 has a level adjustment module, which is used to adjust the voltage level of the booster pump 7 to the second voltage level when the water purification equipment is in the cleaning mode. The voltage value of the second voltage level is lower than the voltage value of the first voltage level.

[0113] With this setting, when the water purifier is in cleaning mode, the booster pump 7 can operate at a lower voltage level, resulting in lower water pressure during the circulation of the cleaning solution. On the one hand, this reduces the amount of cleaning solution that seeps into the pure water end of the reverse osmosis membrane filter element 2, thus reducing chemical residues. On the other hand, it also reduces the damage caused by the cleaning solution to the diaphragm inside the booster pump 7.

[0114] It should be noted that the gear adjustment module can be installed on the casing of the water purifier. When the water purifier is in cleaning mode, the user can adjust the gear of the booster pump 7 by operating the gear adjustment module. Alternatively, the gear adjustment module can be connected to the controller of the water purifier to realize the automatic adjustment of the voltage level of the booster pump 7, etc. Such flexible adjustment and change do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0115] For example, the gear adjustment module is connected to the controller of the water purification equipment to realize the automatic adjustment of the voltage gear of the booster pump 7.

[0116] It should be noted that those skilled in the art do not impose any limitations on the specific connection method between the first end of the circulation pipe 6 and the wastewater end of the reverse osmosis membrane filter element 2. For example, the first end of the circulation pipe 6 can be connected to the wastewater outlet pipe 21, or the reverse osmosis membrane filter element 2 can be configured to have two wastewater outlets, with the wastewater outlet pipe 21 connected to one of the wastewater outlets and the first end of the circulation pipe 6 connected to the other wastewater outlet, etc. Such flexible adjustments and changes 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.

[0117] Preferably, such as Figures 1 to 6 As shown, the first end of the circulation pipe 6 is connected to the wastewater outlet pipe 21.

[0118] In another specific embodiment, such as Figure 3 and Figure 6 As shown, the water purification equipment also includes a circulation pump 61, which is installed on the cleaning circuit and can drive the liquid circulation flow in the cleaning circuit.

[0119] With this setup, compared to driving the liquid circulation within the cleaning circuit via a booster pump 7, using a circulation pump 61 to drive the liquid circulation within the cleaning circuit avoids the need for a booster pump 7 to drive the cleaning fluid circulation within the cleaning circuit. On one hand, this reduces damage to the diaphragm within the booster pump 7 caused by the cleaning fluid, thereby extending the service life of the booster pump 7. On the other hand, since there is no high pressure, it reduces the amount of cleaning fluid that permeates to the pure water end of the reverse osmosis membrane filter element 2, which not only reduces chemical residues but also reduces damage to the membrane of the reverse osmosis membrane filter element 2.

[0120] It should be noted that this utility model does not limit the specific location of the circulation pump 61 in the cleaning circuit. For example, the circulation pump 61 can be set on the circulation pipe 6, or the second end of the circulation pipe 6 can be connected to the inlet end of the reverse osmosis membrane filter element 2 through the main water inlet 52, and the circulation pump 61 can be set on the main water inlet 52. Alternatively, the first end of the circulation pipe 6 can be connected to the wastewater end of the reverse osmosis membrane filter element 2 through the wastewater outlet pipe 21, and the circulation pump 61 can be set on the wastewater outlet pipe 21, etc. Such adjustments and changes to the specific location of the circulation pump 61 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0121] Preferably, such as Figure 3 and Figure 6 As shown, the circulation pump 61 is installed on the circulation pipe 6.

[0122] Preferably, such as Figure 3 and Figure 6 As shown, the circulation pipe 6 is also equipped with a second control valve 62 and a one-way valve 63. The second control valve 62 is used to control the opening and closing of the circulation pipe 6, and the one-way valve 63 can prevent the liquid flowing out from the fourth port 14 from flowing back into the circulation pipe 6.

[0123] Preferably, such as Figures 1 to 6 As shown, the water purification equipment of this utility model also includes a wastewater valve 211 installed on the wastewater outlet pipe 21, and the first end of the circulation pipe 6 is connected to the upstream end of the wastewater valve 211.

[0124] With this setup, when the cleaning fluid circulates within the cleaning circuit, it can prevent the dirt cleaned from the reverse osmosis membrane filter element 2 from clogging the wastewater valve 211.

[0125] Preferably, such as Figures 1 to 6 As shown, the water purification device of this utility model also includes a water purification pipe 56 and a water purification outlet valve 561 installed on the water purification pipe 56. The water purification pipe 56 is connected to the second interface 12 and is used to output water filtered by the first filter unit 31.

[0126] With this setup, the purified water filtered by the first filter unit 31 can be output for user use, thus enabling the water purification equipment to have a dual water output mode and further enhancing the user experience.

[0127] It should be noted that this utility model does not limit the specific output method of the water purified by the water pipe 56 after being filtered by the first filter unit 31, as long as the water filtered by the first filter unit 31 can be output. For example, the water pipe 56 can be connected to a water outlet or faucet to output purified water, or it can be connected to a purified water tank to output purified water, or the pure water component 8 can be configured to have two water inlets, with the water outlet pipe 54 and the water pipe 56 respectively connected to the two water inlets of the pure water component 8, 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.

[0128] Preferably, such as Figures 1 to 6 As shown, the pure water component 8 has two water inlets, and the water outlet pipe 54 and the purified water pipe 56 are respectively connected to the two water inlets of the pure water component 8.

[0129] It should be noted that this utility model does not limit the specific type of filter element installation structure 1, as long as it enables the pre- and post-filter composite elements 3 or cleaning modules 4 to be installed on the filter element installation structure 1.

[0130] In one specific embodiment, the filter element mounting structure 1 only has pipe interfaces, that is, the filter element mounting structure 1 only has a first interface 11, a second interface 12, a third interface 13 and a fourth interface 14.

[0131] When installing the pre- and post-filter composite element 3 onto the filter element mounting structure 1, the first inlet 311 is connected to the first interface 11, the first outlet 312 is connected to the second interface 12, the second inlet 321 is connected to the third interface 13, and the second outlet 322 is connected to the fourth interface 14, thereby installing the pre- and post-filter composite element 3 onto the filter element mounting structure 1.

[0132] When the cleaning module 4 is installed onto the filter element mounting structure 1, the pre- and post-filter composite elements 3 are removed, the first cleaning inlet 411 is connected to the first interface 11, the first cleaning outlet 412 is connected to the second interface 12, the second cleaning inlet 421 is connected to the third interface 13, and the second cleaning outlet 422 is connected to the fourth interface 14, thereby installing the cleaning module 4 onto the filter element mounting structure 1.

[0133] In another specific embodiment, the filter element mounting structure 1 may also be configured to include a mounting shell, on which a first interface 11, a second interface 12, a third interface 13 and a fourth interface 14 are provided, and an mounting cavity is formed inside the mounting shell for accommodating the pre- and post-positioned composite filter element 3 or the cleaning module 4.

[0134] When installing the pre- and post-filter composite element 3 onto the filter element mounting structure 1, the pre- and post-filter composite element 3 is inserted into the mounting cavity, so that the first inlet 311 is connected to the first interface 11, the first outlet 312 is connected to the second interface 12, the second inlet 321 is connected to the third interface 13, and the second outlet 322 is connected to the fourth interface 14, thus completing the installation of the pre- and post-filter composite element 3.

[0135] When installing the cleaning module 4 onto the filter element mounting structure 1, the pre- and post-composite filter elements 3 are pulled out from the mounting cavity, and the cleaning module 4 is inserted into the mounting cavity, so that the first cleaning inlet 411 is connected to the first interface 11, the first cleaning outlet 412 is connected to the second interface 12, the second cleaning inlet 421 is connected to the third interface 13, and the second cleaning outlet 422 is connected to the fourth interface 14, thus completing the installation of the cleaning module 4.

[0136] It should be noted that although the present invention describes the filter element installation structure 1 using the above two embodiments, this is not restrictive. Any other possible structures do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0137] It should be noted that the pre- and post-filter composite element 3 can be removed from the filter element mounting structure 1 after the service life of the pre- and post-filter composite element 3 has expired, and the cleaning module 4 can be installed on the filter element mounting structure 1 to clean the reverse osmosis membrane filter element 2. After cleaning, the cleaning module 4 can be removed from the filter element mounting structure 1, and the new pre- and post-filter composite element 3 can be installed on the filter element mounting structure 1.

[0138] Alternatively, when it is necessary to clean the reverse osmosis membrane filter element 2, the pre- and post-filter composite element 3 can be removed from the filter element mounting structure 1, and the cleaning module 4 can be installed on the filter element mounting structure 1 to clean the reverse osmosis membrane filter element 2. After cleaning is completed, the cleaning module 4 can be removed from the filter element mounting structure 1, and the previously removed pre- and post-filter composite element 3 can be reinstalled on the filter element mounting structure 1.

[0139] The specific working process of the water purification equipment of this utility model is described below in conjunction with the following scenarios.

[0140] Scenario 1:

[0141] The water purification equipment is in normal water production mode:

[0142] like Figures 1 to 6As shown, the pre- and post-filter composite element 3 is installed on the filter element installation structure 1. The inlet valve 521 is opened and the booster pump 7 is started. Water enters the pre- and post-filter composite element 3 through the first interface 11 and enters the first filter unit 31 through the first inlet 311. After being filtered by the first filter unit 31, the water flows out sequentially from the first outlet 312 and the second interface 12, and then flows into the inlet end of the reverse osmosis membrane filter element 2 through the main inlet channel 52. The water filtered by the reverse osmosis membrane filter element 2 flows out from the pure water end of the reverse osmosis membrane filter element 2, and flows into the second filter unit 32 sequentially through the third interface 13 and the second inlet 321. After being filtered by the second filter unit 32, the water flows out sequentially from the second outlet 322 and the fourth interface 14, and finally is delivered to the pure water component 8 through the outlet pipe 54 for users to drink.

[0143] Scenario 2:

[0144] The water purification equipment is in cleaning mode and the first cleaning agent 413 is cleaning the reverse osmosis membrane filter element 2:

[0145] Remove the pre- and post-filter composite element 3 from the filter element mounting structure 1, install the cleaning module 4 onto the filter element mounting structure 1, and open the water inlet valve 521.

[0146] like Figure 1 and Figure 2 As shown, water enters the cleaning module 4 through the first interface 11 and enters the first cavity 41 through the first cleaning inlet 411. The first cleaning agent 413 in the first cavity 41 is dissolved to form the first cleaning liquid. The first cleaning liquid flows out through the first cleaning outlet 412 and the second interface 12 in sequence, and then enters the reverse osmosis membrane filter element 2 through the main water inlet 52. The first cleaning liquid soaks the reverse osmosis membrane filter element 2 to remove the dirt on the reverse osmosis membrane filter element.

[0147] like Figure 3 and Figure 6 As shown, water enters the cleaning module 4 through the first interface 11 and enters the first cavity 41 through the first cleaning inlet 411. The first cleaning agent 413 in the first cavity 41 is dissolved to form the first cleaning liquid. The first cleaning liquid flows out through the first cleaning outlet 412 and the second interface 12 in sequence, and then enters the reverse osmosis membrane filter element 2 through the main water inlet 52. The circulation pump 61 is started to make the first cleaning liquid circulate in the cleaning circuit, so that the first cleaning liquid circulates and flushes the reverse osmosis membrane filter element 2 to clean it.

[0148] like Figure 4 and Figure 5As shown, the booster pump 7 is started and adjusted to the second voltage level, so that water enters the cleaning module 4 through the first interface 11 and enters the first cavity 41 through the first cleaning inlet 411. The first cleaning agent 413 in the first cavity 41 is dissolved to form the first cleaning liquid. The first cleaning liquid flows out through the first cleaning outlet 412 and the second interface 12 in sequence, and then enters the reverse osmosis membrane filter element 2 through the main water inlet 52. The booster pump 7 makes the first cleaning liquid circulate in the cleaning circuit, so that the first cleaning liquid circulates and flushes the reverse osmosis membrane filter element 2 to clean it.

[0149] Scenario 3:

[0150] The water purification equipment is in cleaning mode and the second cleaning agent 423 is cleaning the reverse osmosis membrane filter element 2:

[0151] After cleaning the reverse osmosis membrane filter element 2 with the first cleaning agent 413, open the inlet valve 521, close the outlet valve 541, and start the booster pump 7 to allow water to enter the cleaning module 4 through the first interface 11, enter the first chamber 41 through the first cleaning inlet 411, and then flow out through the first cleaning outlet 412 and the second interface 12 in sequence. The booster pump 7 delivers the water flowing out of the second interface 12 to the reverse osmosis membrane filter element 2. The pure water filtered by the reverse osmosis membrane filter element 2 is delivered to the second chamber 42 through the pure water pipe 53 and through the third interface 13 and the second cleaning inlet 421 in sequence. The second cleaning agent 423 in the second chamber 42 is dissolved to form the second cleaning liquid. The second cleaning liquid flows out of the cleaning module 4 through the second cleaning outlet 422 and the fourth interface 14 in sequence, and flows back to the reverse osmosis membrane filter element 2 through the return pipe 55.

[0152] After the second cleaning solution is delivered into the reverse osmosis membrane filter element 2, as follows Figure 1 and Figure 2 As shown, the second cleaning solution soaks the reverse osmosis membrane filter element 2 to remove dirt from the reverse osmosis membrane filter element 2, and the cleaned water is discharged from the wastewater outlet pipe 21.

[0153] After the second cleaning solution is delivered into the reverse osmosis membrane filter element 2, as follows Figure 3 and Figure 6 As shown, the circulation pump 61 is started to make the second cleaning liquid circulate in the cleaning circuit, so that the second cleaning liquid circulates and flushes the reverse osmosis membrane filter element 2 to clean the reverse osmosis membrane filter element 2. The cleaned water is discharged from the wastewater outlet pipe 21.

[0154] After the second cleaning solution is delivered into the reverse osmosis membrane filter element 2, as follows Figure 4 and Figure 5As shown, the booster pump 7 is started and the working voltage of the booster pump 7 is adjusted to the second voltage level. The booster pump 7 drives the second cleaning liquid to circulate in the cleaning circuit, so that the second cleaning liquid circulates and flushes the reverse osmosis membrane filter element 2 to clean the reverse osmosis membrane filter element 2. The cleaned water is discharged from the wastewater outlet pipe 21.

[0155] Scenario 4:

[0156] After cleaning is complete, remove any remaining small amount of cleaning agent:

[0157] like Figures 1 to 6 As shown, after the water purification equipment finishes cleaning, it resumes water production mode by opening the inlet valve 521 and starting the booster pump 7. Water enters the cleaning module 4 through the first interface 11 and then enters the first chamber 41 through the first cleaning inlet 411. It then flows out through the first cleaning outlet 412 and the second interface 12, and flows into the inlet end of the reverse osmosis membrane filter element 2 through the main inlet channel 52. The water filtered by the reverse osmosis membrane filter element 2 flows out from the pure water end of the reverse osmosis membrane filter element 2, and then flows into the second chamber 42 through the second cleaning inlet 421 and the third interface 13. It then flows out through the second cleaning outlet 422 and the fourth interface 14, and then flows into the return pipe 55 through the outlet pipe 54. It then flows back into the reverse osmosis membrane filter element 2 through the return pipe 55. After multiple filtrations, the small amount of cleaning agent remaining at the pure water end of the reverse osmosis membrane filter element 2 is discharged.

[0158] Of course, you can first remove the cleaning module 4 from the filter element installation structure 1, and then install the pre- and post-filter composite filter element 3 onto the filter element installation structure 1 before resuming the water purification equipment in water production mode to discharge the small amount of cleaning agent remaining in the pure water end of the reverse osmosis membrane filter element 2.

[0159] Scenario 5:

[0160] After cleaning is complete, replace the cleaning module 4 with the pre- and post-filter composite element 3.

[0161] After cleaning is complete, remove the cleaning module 4 from the filter element mounting structure 1 and install the pre- and post-composite filter elements 3 onto the filter element mounting structure 1.

[0162] The technical solution of this utility model has been described above with reference to 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 device, characterized in that, The water purification equipment includes: Reverse osmosis membrane filter element (2); Pure water component (8) is used to output filtered water for users to drink; Pre- and post-composite filter element (3); The filter element installation structure (1) has a first interface (11), a second interface (12), a third interface (13), and a fourth interface (14). The first interface (11) is connected to a water source, the second interface (12) can be connected to the inlet end of the reverse osmosis membrane filter element (2), the third interface (13) can be connected to the pure water end of the reverse osmosis membrane filter element (2), and the fourth interface (14) can be selectively connected to the pure water component (8) or the inlet end of the reverse osmosis membrane filter element (2); and The cleaning module (4) has a first cleaning inlet (411), a first cleaning outlet (412), a second cleaning inlet (421), and a second cleaning outlet (422) that are respectively adapted to the first interface (11), the second interface (12), the third interface (13), and the fourth interface (14). The cleaning module (4) is provided with a first cavity (41) for storing the first cleaning agent (413) and a second cavity (42) for storing the second cleaning agent (423). The first cleaning inlet (411) and the first cleaning outlet (412) are both connected to the first cavity (41), and the second cleaning inlet (421) and the second cleaning outlet (422) are both connected to the second cavity (42). The pre- and post-composite filter element (3) and the cleaning module (4) can be selectively installed on the filter element mounting structure (1).

2. The water purification equipment according to claim 1, characterized in that, The water purification equipment also includes an outlet pipe (54), an outlet valve (541), a return pipe (55), and a return valve (551). The first end of the outlet pipe (54) and the first end of the return pipe (55) can be connected to the fourth interface (14). The second end of the outlet pipe (54) is connected to the pure water component (8). The second end of the return pipe (55) is connected to the inlet end of the reverse osmosis membrane filter element (2). The outlet valve (541) is installed on the outlet pipe (54) and is used to control the opening and closing of the outlet pipe (54). The return valve (551) is installed on the return pipe (55) and is used to control the opening and closing of the return pipe (55). Alternatively, the water purification equipment may also include an outlet pipe (54), a return pipe (55), and a reversing valve (9). The first end of the reversing valve (9) is connected to the fourth interface (14), the second end of the reversing valve (9) is connected to the pure water component (8) through the outlet pipe (54), and the third end of the reversing valve (9) is connected to the inlet end of the reverse osmosis membrane filter element (2) through the return pipe (55). The first end of the reversing valve (9) can selectively connect to the second end or the third end of the reversing valve (9).

3. The water purification equipment according to claim 1, characterized in that, The cleaning module (4) includes a housing (40) and a partition member (43) disposed within the housing (40), the partition member (43) dividing the space within the housing (40) into a first cavity (41) and a second cavity (42). And / or, the first cleaning agent (413) and / or the second cleaning agent (423) is at least one of an acidic cleaning agent, an alkaline cleaning agent or an oxidizing cleaning agent.

4. The water purification equipment according to claim 3, characterized in that, The partition member (43) is an annular structure, and the first cavity (41) is formed between the partition member (43) and the shell (40), and the second cavity (42) is formed inside the partition member (43). Alternatively, a second cavity (42) may be formed between the partition member (43) and the housing (40), and a first cavity (41) may be formed within the partition member (43).

5. The water purification equipment according to claim 3, characterized in that, The partition member (43) is a plate-shaped structure disposed in the housing (40), and the first cavity (41) and the second cavity (42) are located on both sides of the partition member (43).

6. The water purification equipment according to claim 1, characterized in that, The pre- and post-filter composite element (3) includes a housing (30) and a first filter unit (31) and a second filter unit (32) disposed within the housing (30). The housing (30) is provided with a first inlet (311), a first outlet (312), a second inlet (321) and a second outlet (322). The first inlet (311) is connected to the inlet end of the first filter unit (31), the first outlet (312) is connected to the outlet end of the first filter unit (31), the second inlet (321) is connected to the inlet end of the second filter unit (32), and the second outlet (322) is connected to the outlet end of the second filter unit (32). The first filtration unit (31) is a pre-filtration unit, and the second filtration unit (32) is a post-filtration unit or a mineralization unit.

7. The water purification equipment according to claim 1, characterized in that, The water purification equipment also includes a circulation pipe (6), wherein: The first end of the circulation pipe (6) is connected to the wastewater end of the reverse osmosis membrane filter element (2), and the second end of the circulation pipe (6) is connected to the inlet end of the reverse osmosis membrane filter element (2), so that the inlet end of the reverse osmosis membrane filter element (2) and the wastewater end of the reverse osmosis membrane filter element (2) are connected to form a cleaning circuit. Alternatively, the first end of the circulation pipe (6) is connected to the wastewater end of the reverse osmosis membrane filter element (2), and the second end of the circulation pipe (6) is connected to the first interface (11), so that the cleaning module (4), 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 cleaning loop. The water purification equipment is configured to drive the liquid circulation within the cleaning circuit.

8. The water purification equipment according to claim 7, characterized in that, The second end of the circulation pipe (6) is located upstream of the booster pump (7) of the water purification equipment, and the booster pump (7) can drive the liquid circulation flow in the cleaning circuit; Alternatively, the water purification device may further include a circulation pump (61) which is disposed on the cleaning circuit and is capable of driving the liquid circulation flow within the cleaning circuit.

9. The water purification equipment according to claim 8, characterized in that, The booster pump (7) includes at least a first voltage level and a second voltage level. The booster pump (7) has a level adjustment module, which is used to adjust the voltage level of the booster pump (7) to the second voltage level when the water purification equipment is in cleaning mode. The voltage value of the second voltage level is lower than the voltage value of the first voltage level.

10. The water purification equipment according to any one of claims 1 to 9, characterized in that, The water purification equipment also includes a water purification pipe (56) and a water purification outlet valve (561) installed on the water purification pipe (56). The water purification pipe (56) is connected to the second interface (12) and is used to output water filtered by the first filtration unit (31) of the pre- and post-composite filter cartridge (3). The water purification outlet valve (561) is used to control the opening and closing of the water purification pipe (56). Alternatively, the water purification equipment may also include a main water inlet (52), the second interface (12) being connected to the inlet end of the reverse osmosis membrane filter (2) through the main water inlet (52), the booster pump (7) of the water purification equipment being installed on the main water inlet (52), and the fourth interface (14) being able to selectively connect to the main water inlet (52) or the pure water component (8).

Images