Water purifier

Abstract

This utility model relates to the field of household appliance technology, specifically providing a drinking water device aimed at solving the problems of complex pipe connections, high cost, and poor cleaning effect of existing water purifiers. The water purifier of this application includes a reverse osmosis membrane filter element, a main inlet pipe, a post-filter element, a return pipe, and a circulation pipe. A first cleaning agent is disposed inside the post-filter element. The pure water end of the reverse osmosis membrane filter element is connected to the inlet end of the post-filter element. The two ends of the return pipe are respectively connected to the outlet end of the post-filter element and the inlet end of the reverse osmosis membrane filter element. The two ends of the circulation pipe are respectively connected to the wastewater end of the reverse osmosis membrane filter element and the inlet end of the reverse osmosis membrane filter element. The water purifier is configured to drive the liquid circulation flow within the cleaning circuit. This application cleans the reverse osmosis membrane filter element using the cleaning agent inside the post-filter element, eliminating the need for an external cleaning module, simplifying pipe connections, and also enabling cyclic flushing of the reverse osmosis membrane filter element through the circulation pipe, thus improving the cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically providing a water purifier. Background Technology

[0002] As people's living standards improve, their demand for drinking water is also increasing. Water dispensers, tea dispensers, pipeline water dispensers, and integrated water purifiers 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 be used for a long time, it will reduce the quality of the water produced by the water purification equipment. If the reverse osmosis membrane filter element is replaced frequently, the high cost of replacing the reverse osmosis membrane filter element will lead to a high operating cost of the water purification equipment.

[0004] In existing technologies, cleaning reverse osmosis membrane filter cartridges with detergents can extend their service life. However, existing water purification equipment usually has the cleaning module externally installed, meaning the cleaning module is connected to the main water inlet line via pipes and valves. This results in complex and costly piping connections for the water purification equipment. Furthermore, the existing method of cleaning reverse osmosis membrane filter cartridges by soaking them in detergents has poor cleaning results, which in turn affects the user experience. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, namely, to solve the problems of complex pipe connections, high cost and poor cleaning effect of existing water purifiers.

[0006] In a first aspect, the present invention provides a water purifier, comprising: a reverse osmosis membrane filter element; a main inlet channel, the first end of which is connected to the inlet end of the reverse osmosis membrane filter element; a post-filter element containing a first cleaning agent, wherein the pure water end of the reverse osmosis membrane filter element is connected to the inlet end of the post-filter element, so that pure water filtered by the reverse osmosis membrane filter element enters the post-filter element to dissolve the first cleaning agent and form a cleaning solution; a return pipe, the first end of which is connected to the outlet end of the post-filter element, and the second end of which is connected to the inlet end of the reverse osmosis membrane filter element, so as to transport the cleaning solution into the reverse osmosis membrane filter element; and a circulation pipe, the first end of which is connected to the wastewater end of the reverse osmosis membrane filter element, and the second end of which is connected to the inlet end of the reverse osmosis membrane filter element, so that the inlet end and the wastewater end of the reverse osmosis membrane filter element are sequentially connected to form a cleaning circuit; wherein the water purifier is configured to drive the liquid in the cleaning circuit to circulate and clean the reverse osmosis membrane filter element.

[0007] In the preferred embodiment of the above-mentioned water purifier, the second end of the return pipe is connected to the main inlet water line so that the cleaning liquid flowing out from the post-filter cartridge is transported to the reverse osmosis membrane cartridge via the main inlet water line; and / or, the second end of the circulation pipe is connected to the main inlet water line so that the liquid flowing out from the wastewater end of the reverse osmosis membrane cartridge is transported to the reverse osmosis membrane cartridge via the main inlet water line.

[0008] In the preferred embodiment of the above-mentioned water purifier, the water purifier further includes a water outlet pipe, the water outlet end of the post-filter cartridge is connected to the water outlet pipe, the first end of the return pipe is connected to the water outlet pipe, and a return valve is provided on the return pipe to control the opening and closing of the return pipe; or, the water purifier further includes a water outlet pipe and a first reversing valve, the water outlet end of the post-filter cartridge is connected to the first interface of the first reversing valve, the first end of the return pipe is connected to the second interface of the first reversing valve, and the water outlet pipe is connected to the third interface of the first reversing valve, wherein the first interface of the first reversing valve can selectively connect to the second interface or the third interface.

[0009] In the preferred embodiment of the above-mentioned water purifier, the water purifier further includes a wastewater pipe, the wastewater end of the reverse osmosis membrane filter element is connected to the wastewater pipe, the first end of the circulation pipe is connected to the wastewater pipe, a cleaning valve is provided on the circulation pipe and the cleaning valve is used to control the opening and closing of the cleaning pipe, and a wastewater valve is provided on the wastewater pipe; and / or, the water purifier further includes a second reversing valve, the wastewater end of the reverse osmosis membrane filter element is connected to the first interface of the second reversing valve, the wastewater pipe is connected to the second interface of the second reversing valve, and the first end of the circulation pipe is connected to the third interface of the second reversing valve, wherein the first interface of the second reversing valve can selectively connect to the second interface or the third interface.

[0010] In the preferred embodiment of the above-mentioned water purifier, the water purifier further includes a first one-way valve, which is disposed on the return pipe and is used to prevent water in the main inlet pipe from flowing back into the return pipe; and / or, the water purifier further includes a second one-way valve, which is disposed on the circulation pipe and is used to prevent water in the main inlet pipe from flowing back into the circulation pipe.

[0011] In the preferred embodiment of the above-mentioned water purifier, the booster pump of the water purifier is installed on the main water inlet, wherein the second end of the circulation pipe is connected to the upstream end of the booster pump, and the booster pump can drive the liquid circulation flow in the cleaning circuit; or, the water purifier further includes a circulation pump, which is installed on the cleaning circuit and used to drive the liquid circulation flow in the cleaning circuit.

[0012] In the preferred embodiment of the above-mentioned water purifier, the booster pump includes at least a first working level and a second working level. The booster pump has a level adjustment module, which is configured to adjust the working level of the booster pump to the first working level when the water purifier is in water production mode and to adjust the working level of the booster pump to the second working level when the water purifier is in cleaning mode. The working pressure value and / or flow rate of the second working level is lower than the working pressure value and / or flow rate of the first working level.

[0013] In the preferred embodiment of the above-mentioned water purifier, the water purifier further includes a pre-filter cartridge containing a second cleaning agent. The inlet end of the pre-filter cartridge is connected to the inlet component so that the water in the inlet component dissolves the second cleaning agent to form a cleaning solution. The outlet end of the pre-filter cartridge is connected to the inlet end of the reverse osmosis membrane filter cartridge through the main inlet channel so that the cleaning solution in the pre-filter cartridge can be transported to the reverse osmosis membrane filter cartridge to clean the reverse osmosis membrane filter cartridge.

[0014] In the preferred embodiment of the above-mentioned water purifier, the water purifier further includes a dirt collection component, which is disposed on the cleaning circuit and is capable of collecting impurities in the cleaning circuit; and / or, the water purifier further includes a flow control component, which is disposed on the circulation pipe and is used to regulate the amount of water flowing from the wastewater end of the reverse osmosis membrane filter element to the inlet end of the reverse osmosis membrane filter element.

[0015] In the preferred embodiment of the above-mentioned water purifier, the dirt collection component is disposed on the circulation pipe; and / or, the dirt collection component includes a housing and a filter screen disposed within the housing, the dirt collection component has an inlet pipe and an outlet pipe, the filter screen divides the space within the housing into a first chamber and a second chamber, wherein the first chamber is connected to the inlet pipe, the second chamber is connected to the outlet pipe, and the filter screen intercepts impurities in the cleaning liquid within the first chamber; and / or, the dirt collection component is further provided with a drain outlet for discharging the collected impurities.

[0016] When the above-mentioned preferred technical solution is adopted, by setting a cleaning agent in the post-filter cartridge, the cleaning agent in the post-filter cartridge can be dissolved to form a cleaning solution after the post-filter cartridge is replaced. By setting a return pipe, the cleaning solution in the post-filter cartridge can flow into the reverse osmosis membrane cartridge to clean the reverse osmosis membrane cartridge, extend the service life of the reverse osmosis membrane cartridge, reduce the replacement cost of the water purifier, and by setting a circulation pipe, the cleaning solution can circulate in the cleaning circuit, thereby circulating and flushing the reverse osmosis membrane cartridge, more effectively cleaning the dirt on the reverse osmosis membrane cartridge, and improving the cleaning effect of the reverse osmosis membrane cartridge.

[0017] Furthermore, by using a booster pump in the water purifier to drive the liquid circulation within the cleaning circuit, there is no need to install an additional pump body, further reducing the cost and size of the water purifier. Moreover, by setting the booster pump to include at least a first voltage level and a second voltage level, when the water purifier is in cleaning mode, the booster pump can operate at a lower voltage level, resulting in lower water pressure during the circulation process of the cleaning liquid. On the one hand, this can prevent the cleaning liquid from seeping into the pure water end of the reverse osmosis membrane filter, reducing chemical residues. On the other hand, it also prevents the cleaning liquid from damaging the diaphragm inside the booster pump.

[0018] Furthermore, by using a circulation pump installed on the cleaning circuit to drive the liquid circulation within the cleaning circuit, it is possible to avoid using a booster pump, thereby preventing damage to the diaphragm in the booster pump from the cleaning liquid and extending the service life of the booster pump. In addition, using a circulation pump to drive the liquid circulation within the cleaning circuit can achieve pressureless driving of the cleaning liquid circulation, which can reduce the amount of cleaning agent that permeates to the pure water end of the reverse osmosis membrane filter element, thereby reducing the residue of cleaning agent in the reverse osmosis membrane filter element.

[0019] Furthermore, by setting a second cleaning agent inside the pre-filter, when the pre-filter is replaced, the second cleaning agent can be dissolved to form a cleaning solution, which is then delivered to the reverse osmosis membrane filter. This allows the second cleaning agent to be used to clean the reverse osmosis membrane filter, enabling the use of different types of cleaning agents to remove different types of dirt from the reverse osmosis membrane filter and improve its cleaning effect.

[0020] Furthermore, by setting up a dirt collection component, when the cleaning fluid circulates in the cleaning circuit, it can intercept the dirt washed off in the cleaning fluid, preventing the dirt from re-entering the reverse osmosis membrane filter element with the cleaning fluid, thereby preventing the dirt from causing secondary pollution to the reverse osmosis membrane filter element and further improving the cleaning effect of the reverse osmosis membrane filter element. Attached Figure Description

[0021] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a structural schematic diagram of a first embodiment of the water purifier of this utility model;

[0023] Figure 2 This is a structural schematic diagram of a second embodiment of the water purifier of this utility model;

[0024] Figure 3 This is a structural schematic diagram of a third embodiment of the water purifier of this utility model;

[0025] Figure 4This is a structural schematic diagram of Embodiment 4 of the water purifier of this utility model;

[0026] Figure 5 This is a structural schematic diagram of Embodiment 5 of the water purifier of this utility model;

[0027] Figure 6 This is a schematic diagram of one embodiment of the dirt collection component of this utility model;

[0028] Figure 7 This is a schematic diagram of another embodiment of the dirt collection component of this utility model;

[0029] Figure 8 This is a schematic diagram of another embodiment of the dirt collection component of this utility model;

[0030] Figure 9 This is a schematic diagram of another embodiment of the dirt collection component of this utility model.

[0031] List of reference numerals in the attached diagram:

[0032] 1. Main water inlet; 11. Inlet valve; 12. Booster pump; 2. Reverse osmosis membrane filter element; 21. Wastewater pipe; 211. Wastewater valve; 3. Post-filter element; 31. First cleaning agent; 4. Pre-filter element; 41. Second cleaning agent; 5. Return pipe; 51. Return valve; 52. First check valve; 53. First water quality detection component; 6. Circulation pipe; 61. Cleaning valve; 62. Circulation pump; 63. Second check valve; 64. Dirt collection component; 641. Housing; 642. Filter screen; 643. First chamber; 644. Second chamber; 645. Liquid inlet pipe; 646. Liquid outlet pipe; 647. Sewage outlet; 65. Flow control component; 66. Second water quality detection component; 7. First reversing valve; 8. Second reversing valve; 9. Outlet pipe. Detailed Implementation

[0033] 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.

[0034] It should be noted that in the description of this utility model, terms such as "upper," "lower," and "inner," 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" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] 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.

[0036] like Figures 1 to 5 As shown, the water purifier of this utility model includes a reverse osmosis membrane filter element 2, a main water inlet 1, a post-filter element 3, a return pipe 5, and a circulation pipe 6. The first end of the main water inlet 1 is connected to the water inlet end of the reverse osmosis membrane filter element 2. A first cleaning agent 31 is provided in the post-filter element 3. The pure water end of the reverse osmosis membrane filter element 2 is connected to the water inlet end of the post-filter element 3 so that the pure water filtered by the reverse osmosis membrane filter element 2 is transported to the post-filter element 3 to dissolve the first cleaning agent 31 and form a cleaning solution. The first end of the return pipe 5 is connected to the water outlet end of the post-filter element 3, and the second end of the return pipe 5 is connected to the water inlet end of the reverse osmosis membrane filter element 2 so that the cleaning solution in the post-filter element 3 is transported to the reverse osmosis membrane filter element 2. 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 water inlet end of the reverse osmosis membrane filter element 2 so that the water inlet end and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning circuit.

[0037] The water purifier is configured to drive the liquid circulation within the cleaning circuit to clean the reverse osmosis membrane filter element 2.

[0038] With this setup, by adding a cleaning agent to the post-filter 3, the cleaning agent in the post-filter 3 can be dissolved to form a cleaning solution after the post-filter 3 is replaced. By setting up the return pipe 5, the cleaning solution in the post-filter 3 can flow into the reverse osmosis membrane filter 2 to clean the reverse osmosis membrane filter 2, extending the service life of the reverse osmosis membrane filter 2 and reducing the replacement cost of the water purifier. Furthermore, by setting up the circulation pipe 6, the cleaning solution can circulate in the cleaning circuit, thereby circulating and flushing the reverse osmosis membrane filter 2, more effectively cleaning off the dirt on the reverse osmosis membrane filter 2 and improving the cleaning effect of the reverse osmosis membrane filter 2.

[0039] It should be noted that, in practical applications, those skilled in the art can place the first cleaning agent 31 in the filter material inside the post-filter element 3, or they can place the first cleaning agent 31 in the cavity inside the filter material of the post-filter element 3, etc. Such adjustments and changes to the specific placement of the first cleaning agent 31 in the post-filter element 3 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.

[0040] Preferably, the post-filter element 3 includes an annular first filter material, the first filter material having a cavity in the middle, and the first cleaning agent 31 is disposed in the cavity of the post-filter element 3.

[0041] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific connection method between the second end of the return pipe 5 and the reverse osmosis membrane filter element 2. For example, the reverse osmosis membrane filter element 2 can be configured to have two inlets, with the main inlet 1 and the second end of the return pipe 5 respectively connected to the two inlets. Alternatively, the main inlet 1 can be configured to connect to the inlet end of the reverse osmosis membrane filter element 2, and the second end of the return pipe 5 can be configured to connect to the main inlet 1, so that the cleaning liquid flowing out from the post-filter element 3 can be transported to the reverse osmosis membrane filter element 2 via the main inlet 1, etc. Such adjustments and changes to the specific connection method between the second end of the return pipe 5 and 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.

[0042] Preferably, such as Figures 1 to 5 As shown, the second end of the return pipe 5 is connected to the main inlet water line 1 so that the cleaning liquid flowing out from the post-filter 3 can be transported to the reverse osmosis membrane filter 2 through the main inlet water line 1.

[0043] With this setup, the cleaning solution in the post-filter 3 can be delivered to the reverse osmosis membrane filter 2 without any modification to the reverse osmosis membrane filter 2.

[0044] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific connection method between the second end of the circulation pipe 6 and the reverse osmosis membrane filter element 2. For example, the reverse osmosis membrane filter element 2 can be configured to have two inlets, with the main inlet 1 and the second end of the circulation pipe 6 respectively connected to the two inlets. Alternatively, the main inlet 1 can be configured to connect to the inlet of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 6 can be configured to connect to the main inlet 1, so that the cleaning liquid flowing out from the wastewater end of the reverse osmosis membrane filter element 2 can be transported to the reverse osmosis membrane filter element 2 through the main inlet 1, etc. Such adjustments and changes to the specific connection method between the second end of the circulation pipe 6 and 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.

[0045] Preferably, such as Figures 1 to 5 As shown, the second end of the circulation pipe 6 is connected to the main inlet water line 1 so that the liquid flowing out from the wastewater end of the reverse osmosis membrane filter element 2 is transported to the reverse osmosis membrane filter element 2 through the main inlet water line 1.

[0046] Preferably, an inlet valve 11 is also provided on the main water inlet 1, which is used to control the opening and closing of the main water inlet 1.

[0047] Preferably, such as Figure 5 As shown, a first water quality detection component 53 is also provided on the return pipe 5. The first water quality detection component 53 is used to detect the water quality information in the return pipe 5. The first water quality detection component 53 is communicatively connected to the booster pump 12.

[0048] When the first cleaning agent is used to clean the reverse osmosis membrane filter element 2, the booster pump 12 is started, so that the reverse osmosis membrane filter element 5 is in normal water production mode. The pure water filtered by the reverse osmosis membrane filter element 2 enters the post-filter element 3. The first cleaning agent is dissolved to form a cleaning solution, which is then transported to the water inlet of the reverse osmosis membrane filter element 2 through the return pipe 5. By setting the first water quality detection component 53, the water quality information in the return pipe 5 can be detected, so as to determine whether the cleaning solution in the post-filter element 3 has been completely transported to the reverse osmosis membrane filter element 2. When the cleaning solution in the post-filter element 3 has been completely transported to the reverse osmosis membrane filter element 2, the signal is transmitted to the booster pump 12, so that the booster pump 12 stops water production.

[0049] It should be noted that, in practical applications, those skilled in the art can place the inlet valve 11 upstream of the second end of the circulation pipe 6 and the second end of the return pipe 5, or place the inlet valve 11 downstream of the second end of the circulation pipe 6 and the second end of the return pipe 5, or place the inlet valve 11 between the second end of the circulation pipe 6 and the second end of the return pipe 5, etc. Such adjustments and changes to the specific placement of the inlet valve 11 on the main water inlet 1 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] Preferably, such as Figures 1 to 5 As shown, the inlet valve 11 is located at the second end of the circulation pipe 6 and upstream of the second end of the return pipe 5.

[0051] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific connection method between the first end of the return pipe 5 and the water outlet of the post-filter 3, as long as the first end of the return pipe 5 can be connected to the water outlet of the post-filter 3.

[0052] In one specific embodiment, such as Figure 1 and Figure 2 , Figure 4 and Figure 5 As shown, the water purifier also includes a water outlet pipe 9, the water outlet end of the post-filter 3 is connected to the water outlet pipe 9, the first end of the return pipe 5 is connected to the water outlet pipe 9, and a return valve 51 is provided on the return pipe 5. The return valve 51 is used to control the opening and closing of the return pipe 5.

[0053] In another specific embodiment, such as Figure 3As shown, the water purifier also includes a water outlet pipe 9 and a first reversing valve 7. The water outlet end of the post-filter 3 is connected to the first interface of the first reversing valve 7, the first end of the return pipe 5 is connected to the second interface of the first reversing valve 7, and the water outlet pipe 9 is connected to the third interface of the first reversing valve 7. The first interface of the first reversing valve 7 can be selectively connected to the second interface or the third interface.

[0054] It should be noted that when the water purifier is not used for a long time, the TDS value of the pure water end of the reverse osmosis membrane filter element 2 is relatively high. At this time, open the reflux valve 51 (or connect the first port of the first reversing valve 7 to the second port), so that the water at the pure water end of the reverse osmosis membrane filter element 2 flows back to the inlet end of the reverse osmosis membrane filter element 2 through the reflux pipe 5. After multiple filtrations, the water with high TDS at the pure water end of the reverse osmosis membrane filter element 2 is discharged, and there is no need to set up a separate reflux pipe 5 for pure water reflux.

[0055] It should also be noted that, in practical applications, this utility model does not impose any restrictions 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, as long as the first end of the circulation pipe 6 can be connected to the wastewater end of the reverse osmosis membrane filter element 2.

[0056] In one specific embodiment, such as Figures 1 to 3 , Figure 5 As shown, the water purifier also includes a wastewater pipe 21, the wastewater end of the reverse osmosis membrane filter element 2 is connected to the wastewater pipe 21, the first end of the circulation pipe 6 is connected to the wastewater pipe 21, a cleaning valve 61 is provided on the circulation pipe 6 and the cleaning valve 61 is used to control the opening and closing of the cleaning pipe, and a wastewater valve 211 is provided on the wastewater pipe 21.

[0057] In another specific embodiment, such as Figure 4 As shown, the water purifier also includes a second reversing valve 8. The wastewater end of the reverse osmosis membrane filter 2 is connected to the first interface of the second reversing valve 8, the wastewater pipe 21 is connected to the second interface of the second reversing valve 8, and the first end of the circulation pipe 6 is connected to the third interface of the second reversing valve 8. The first interface of the second reversing valve 8 can be selectively connected to the second interface or the third interface.

[0058] Preferably, such as Figures 1 to 5 As shown, the water purifier also includes a first one-way valve 52, which is installed on the return pipe 5 and is used to prevent water in the main inlet pipe 1 from flowing back into the return pipe 5.

[0059] Preferably, such as Figures 1 to 5 As shown, the water purifier also includes a second one-way valve 63, which is installed on the circulation pipe 6 and is used to prevent water in the main inlet pipe 1 from flowing back into the circulation pipe 6.

[0060] It should be noted that, in practical applications, those skilled in the art do not impose any restrictions on the specific driving method for driving the liquid circulation within the cleaning circuit, as long as it can drive the cleaning fluid circulation within the cleaning circuit.

[0061] The following two embodiments will be described in detail.

[0062] Example 1:

[0063] like Figure 1 , Figure 3 and Figure 5 As shown, the second end of the circulation pipe 6 is connected to the upstream end of the booster pump 12, which can drive the liquid circulation flow in the cleaning circuit.

[0064] With this setup, the booster pump 12 of the water purifier can drive the liquid circulation in the cleaning circuit without the need for an additional pump body, further reducing the cost and size of the water purifier.

[0065] It should be noted that, in practical applications, those skilled in the art can configure the booster pump 12 to have only one working position, in which the booster pump 12 can both produce water and drive the liquid circulation in the cleaning circuit. Alternatively, the booster pump 12 can be configured to include at least a first working position and a second working position, wherein the working pressure value (and / or flow rate) of the second working position is lower than the working pressure value (and / or flow rate) of the first working position. In the first working position, the booster pump 12 pressurizes the inlet of the reverse osmosis membrane filter element 2 to produce water, and in the second working position, the booster pump 12 drives the liquid circulation in the cleaning circuit, 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.

[0066] Preferably, the booster pump 12 includes at least a first working level and a second working level. The booster pump 12 has a level adjustment module, which is used to adjust the working level of the booster pump 12 to the first working level when the water purifier is in water production mode and to adjust the working level of the booster pump 12 to the second working level when the water purifier is in cleaning mode. The working pressure value and / or flow rate of the second working level is lower than the working pressure value and / or flow rate of the first working level.

[0067] With this setting, when the water purifier is in cleaning mode, the booster pump 12 can operate at a lower working pressure or a lower flow rate, so that the water pressure of the cleaning solution during circulation is lower. On the one hand, this can prevent the cleaning solution from seeping into the pure water end of the reverse osmosis membrane filter element 2, reducing chemical residues. On the other hand, it can also prevent the cleaning solution from damaging the diaphragm inside the booster pump 12.

[0068] It should be noted that the working pressure value of the second working level can be set lower than that of the first working level, or the flow rate of the second working level can be set lower than that of the first working level, or the working pressure value of the second working level can be set lower than that of the first working level, and the flow rate of the second working level can be set lower than that of the first working level, 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.

[0069] It should be noted that the booster pump 12 can be configured to include a first working position and a second working position, or it can be configured to include more working positions, 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.

[0070] It should also be noted that the speed adjustment module can be installed on the outer casing of the water purifier. When the water purifier is in cleaning mode, the user can adjust the speed of the booster pump 12 by operating the speed adjustment module. Alternatively, the speed 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 12, 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.

[0071] For example, the speed adjustment module is connected to the controller of the water purifier to realize the automatic adjustment of the voltage speed of the booster pump 12.

[0072] Example 2:

[0073] like Figure 2 and Figure 4 As shown, the water purifier also includes a circulation pump 62, which is installed on the cleaning circuit and is used to drive the liquid circulation flow in the cleaning circuit.

[0074] With this setup, the use of booster pump 12 for driving can be avoided, thereby preventing damage to the diaphragm inside booster pump 12 in the cleaning solution and extending the service life of booster pump 12. In addition, using circulation pump 62 to drive the liquid circulation in the cleaning circuit can achieve low water pressure to drive the cleaning solution circulation, which can reduce the amount of cleaning agent that permeates to the pure water end of reverse osmosis membrane filter element 2, thereby reducing the residue of cleaning agent in reverse osmosis membrane filter element 2.

[0075] Preferably, a second water quality detection component 66 is also provided on the circulation pipe 6. The second water quality detection component 66 is used to detect the water quality information in the circulation pipe 6. The second water quality detection component 66 is communicatively connected to the booster pump 12 or the circulation pump 62 so as to selectively stop the flow of liquid in the cleaning circuit according to the detection result of the second water quality detection component 66.

[0076] With this setup, namely by setting up a second water quality detection component 66, the water quality information in the circulation pipe 6 can be detected, thereby determining whether dirt continues to enter the circulation pipe 6, and thus determining whether the reverse osmosis membrane filter element 2 has been cleaned. When the second water quality detection component 66 detects that the water quality in the circulation pipe 6 does not change, it transmits a signal to the booster pump 12 or the circulation pump 62 to stop the flow of liquid in the cleaning circuit.

[0077] Preferably, such as Figures 1 to 5 As shown, the water purifier also includes a pre-filter 4, which contains a second cleaning agent 41. The inlet of the pre-filter 4 is connected to the inlet component so that the water in the inlet component dissolves the second cleaning agent 41 to form a cleaning solution. The outlet of the pre-filter 4 is connected to the inlet of the reverse osmosis membrane filter 2 via the main inlet channel 1 so that the cleaning solution in the pre-filter 4 can be transported to the reverse osmosis membrane filter 2 to clean the reverse osmosis membrane filter 2.

[0078] With this setup, by placing a second cleaning agent 41 inside the pre-filter 4, when the pre-filter 4 is replaced, the second cleaning agent 41 can be dissolved to form a cleaning solution, which is then delivered to the reverse osmosis membrane filter 2. This allows the second cleaning agent 41 to be used to clean the reverse osmosis membrane filter 2, enabling the use of different types of cleaning agents to clean the reverse osmosis membrane filter 2, removing different types of dirt from it and improving the cleaning effect of the reverse osmosis membrane filter 2.

[0079] It should be noted that, in practical applications, those skilled in the art can configure the water inlet component as a water inlet pipe connected to a tap water pipe, or the water inlet component can be configured as a water storage tank, with the water inlet end of the pre-filter 4 connected to the water storage tank, and the water in the water storage tank entering the pre-filter 4 to dissolve the second cleaning agent 41 to form a cleaning liquid, etc. Such adjustments and changes to the specific configuration of the water inlet 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.

[0080] Preferably, the water inlet component is a water inlet pipe.

[0081] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific configuration types of the first cleaning agent 31 and the second cleaning agent 41. For example, one of the first cleaning agent 31 and the second cleaning agent 41 can be set as an acidic cleaning agent and the other as an alkaline cleaning agent; or, one of the first cleaning agent 31 and the second cleaning agent 41 can be set as an acidic cleaning agent and the other as an oxidizing agent; or, one of the first cleaning agent 31 and the second cleaning agent 41 can be set as an alkaline cleaning agent and the other as an oxidizing agent, etc. Such adjustments and changes to the specific configuration types of the first cleaning agent 31 and the second cleaning agent 41 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.

[0082] For example, the first cleaning agent 31 is an acidic cleaning agent, and the second cleaning agent 41 is an alkaline cleaning agent.

[0083] Preferably, such as Figures 1 to 5 As shown, the water purifier of this utility model also includes a dirt collection component 64, which is disposed on the cleaning circuit and can collect impurities in the cleaning circuit.

[0084] By setting up the dirt collection component 64, when the cleaning liquid circulates in the cleaning circuit, it can intercept the dirt washed off in the cleaning liquid, preventing the dirt from re-entering the reverse osmosis membrane filter element 2 with the cleaning liquid, thereby preventing the dirt from causing secondary pollution to the reverse osmosis membrane filter element 2 and further improving the cleaning effect of the reverse osmosis membrane filter element 2.

[0085] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific location of the dirt collection component 64 in the cleaning circuit. For example, the dirt collection component 64 can be set on the circulation pipe 6, or it can be set on the main water inlet 1, etc. Such adjustments and changes to the specific location of the dirt collection component 64 in the cleaning circuit 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 5 As shown, the dirt collection component 64 is disposed on the circulation pipe 6 and located upstream of the cleaning valve 61.

[0087] With this setup, the dirt collection component 64 is placed on the circulation pipe 6, which allows the dirt in the cleaning liquid flowing out of the wastewater end of the reverse osmosis membrane filter element 2 to be intercepted as soon as possible, while also preventing the dirt from entering the main water inlet 1.

[0088] Preferably, such as Figures 6 to 7As shown, the dirt collection component 64 includes a housing 641 and a filter screen 642 disposed within the housing 641. The dirt collection component 64 has an inlet pipe 645 and an outlet pipe 646. The filter screen 642 divides the space within the housing 641 into a first chamber 643 and a second chamber 644. The first chamber 643 is connected to the water inlet, and the second chamber 644 is connected to the water outlet. The filter screen 642 intercepts impurities in the cleaning liquid within the first chamber 643.

[0089] It should be noted that, in practical applications, those skilled in the art do not impose any restrictions on the specific type of the dirt collection component 64, as long as it can intercept the dirt in the cleaning fluid.

[0090] In one specific embodiment, such as Figure 6 As shown, the filter surface of filter 642 is set to be perpendicular to the horizontal direction.

[0091] In another specific embodiment, such as Figure 7 and Figure 8 As shown, the filter surface of filter 642 is set to be parallel to the horizontal direction.

[0092] In another possible embodiment, such as Figure 9 As shown, the filter surface of filter screen 642 is set at a predetermined angle with the horizontal direction.

[0093] Preferably, such as Figures 6 to 9 As shown, the dirt collection component 64 of this utility model is also provided with a drain port 647, wherein the drain port 647 is used to discharge the collected impurities.

[0094] Specifically, such as Figures 6 to 9 As shown, the drain port 647 communicates with the first chamber 643. The dirt collection component 64 also includes a drain valve, which is located at the drain port 647 and can open or close the drain port 647. For example, the drain valve can be pivotally connected to the housing 641, or it can be slidably connected to the housing 641, or it can be detachably connected to the housing 641, etc. Such adjustments and changes to the specific connection method between the drain valve and the housing 641 do not deviate from the protection scope of this utility model.

[0095] It should be noted that, in practical applications, those skilled in the art can place the dirt collection component 64 upstream of the cleaning valve 61 and the second check valve 63, or downstream of the cleaning valve 61 and the second check valve 63, or between the cleaning valve 61 and the second check valve 63, etc. Such adjustments and changes to the specific placement of the dirt collection component 64 on the circulation pipe 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.

[0096] Preferably, such as Figures 1 to 3 , Figure 5 As shown, the dirt collection component 64 is disposed upstream of the cleaning valve 61 and the second check valve 63.

[0097] This setup prevents dirt in the cleaning circuit from clogging the cleaning valve 61 and the second check valve 63.

[0098] Preferably, such as Figures 1 to 5 As shown, the water purifier of this utility model also includes a flow control component 65, which is disposed on the cleaning circuit and is used to regulate the amount 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.

[0099] When the water purifier is in normal water production mode, it can also achieve wastewater return through the circulation pipe 6, which helps to reduce water waste. By setting the flow control component 65, the return flow 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. On the one hand, it can avoid the problem of water waste caused by insufficient return flow, and on the other hand, it can also avoid affecting the service life of the reverse osmosis membrane filter element 2 due to excessive return flow.

[0100] It should be noted that when cleaning the reverse osmosis membrane filter element 2, the first cleaning agent 31 can be used to clean the reverse osmosis membrane filter element 2 first, and then the second cleaning agent 41 can be used to clean the reverse osmosis membrane filter element 2. Alternatively, the second cleaning agent 41 can be used to clean the reverse osmosis membrane filter element 2 first, and then the first cleaning agent 31 can be used to clean the reverse osmosis membrane filter element 2, and so on. 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.

[0101] For example, the reverse osmosis membrane filter element 2 is first cleaned with a first cleaning agent 31, and then the reverse osmosis membrane filter element 2 is cleaned with a second cleaning agent 41.

[0102] The working process of the water purification equipment of this utility model will be described in detail below in the following scenarios.

[0103] Scenario 1:

[0104] Normal water production mode: Open the inlet valve 11, close the cleaning valve 61 and the return valve 51. The water in the inlet component is filtered by the pre-filter 4 and then transported to the reverse osmosis membrane filter 2 through the main inlet channel 1. The pure water filtered by the reverse osmosis membrane filter 2 flows out through the outlet pipe 9 for user use. The wastewater generated by filtration is discharged through the wastewater pipe 21.

[0105] In addition, some of the wastewater generated by filtration can be returned to the inlet of the reverse osmosis membrane filter element 2 through the circulation pipe 6 to achieve wastewater return. At the same time, the return flow rate of wastewater can be adjusted through the flow control component 65, so as to improve the utilization rate of water source and the service life of reverse osmosis membrane filter element 2.

[0106] Scenario 2:

[0107] The first cleaning agent 31 cleans the reverse osmosis membrane filter element 2 in the following mode: After replacing the post-filter element 3, the new post-filter element 3 is equipped with the first cleaning agent 31. The water inlet valve 11 is opened, and the water in the water inlet component is filtered by the pre-filter element 4 and then transported to the reverse osmosis membrane filter element 2 through the main water inlet pipe 1 (the reverse osmosis membrane filter element 2 is in water production mode). The pure water filtered by the reverse osmosis membrane filter element 2 enters the post-filter element 3 and dissolves the first cleaning agent 31 to form a cleaning solution (at this time, the reverse osmosis membrane filter element 2 stops producing water). The cleaning solution is then returned to the reverse osmosis membrane filter element 2 through the return pipe 5. The cleaning valve 61 and the booster pump 12 (or circulation pump 62) are then opened, and the cleaning solution circulates in the cleaning circuit. The dirt that is cleaned off is transported back to the water inlet of the reverse osmosis membrane filter element 2 through the circulation pipe 6 along with the cleaning solution, and is flushed multiple times to clean the reverse osmosis membrane filter element 2.

[0108] The dirt cleaned from the reverse osmosis membrane filter element 2 flows through the dirt collection component 64 along with the cleaning fluid. The filter screen 642 intercepts the dirt in the first chamber 643, which can prevent the dirt from entering the reverse osmosis membrane filter element 2 and causing secondary pollution to the reverse osmosis membrane filter element 2.

[0109] Scenario 3:

[0110] The first cleaning agent 31 cleans the reverse osmosis membrane filter element 2 in the following mode: After replacing the pre-filter element 4, the new pre-filter element 4 is equipped with the second cleaning agent 41. The water inlet valve 11 is opened, and the water in the water inlet component enters the pre-filter element 4 and dissolves the second cleaning agent 41 to form a cleaning solution. The cleaning solution is transported to the reverse osmosis membrane filter element 2 through the main water inlet 1. The water inlet valve 11 is closed, and the booster pump 12 (or circulation pump 62) is started to make the cleaning solution in the reverse osmosis membrane filter element 2 circulate in the cleaning circuit. The dirt that is cleaned off is transported back to the water inlet end of the reverse osmosis membrane filter element 2 through the circulation pipe 6 with the cleaning solution and is rinsed multiple times to clean the reverse osmosis membrane filter element 2.

[0111] The dirt cleaned from the reverse osmosis membrane filter element 2 flows through the dirt collection component 64 along with the cleaning fluid. The filter screen 642 intercepts the dirt in the first chamber 643, which can prevent the dirt from entering the reverse osmosis membrane filter element 2 and causing secondary pollution to the reverse osmosis membrane filter element 2.

[0112] Scenario 4:

[0113] Pure water reflux mode: After cleaning the reverse osmosis membrane filter element 2 with the first cleaning agent 31 or the second cleaning agent 41, a small amount of cleaning agent will permeate to the pure water end of the reverse osmosis membrane filter element 2. Open the reflux valve 51 so that the water at the pure water end of the reverse osmosis membrane filter element 2 is transported to the inlet end of the reverse osmosis membrane filter element 2. After multiple filtrations, the pure water containing a small amount of cleaning agent is discharged.

[0114] 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 purifier, characterized in that, The water purifier includes: Reverse osmosis membrane filter element (2); The main inlet channel (1) is connected at its first end to the inlet end of the reverse osmosis membrane filter element (2); The post-filter (3) contains a first cleaning agent (31). The pure water end of the reverse osmosis membrane filter (2) is connected to the water inlet end of the post-filter (3) so that the pure water filtered by the reverse osmosis membrane filter (2) enters the post-filter (3) to dissolve the first cleaning agent (31) and form a cleaning solution. A return pipe (5) has its first end connected to the outlet of the post-filter (3) and its second end connected to the inlet of the reverse osmosis membrane filter (2) to deliver the cleaning solution into the reverse osmosis membrane filter (2); and The circulation pipe (6) has its first end connected to the wastewater end of the reverse osmosis membrane filter element (2) and its second end 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 in sequence to form a cleaning circuit. The water purifier is configured to drive the liquid circulation flow in the cleaning circuit to clean the reverse osmosis membrane filter element (2).

2. The water purifier according to claim 1, characterized in that, The second end of the return pipe (5) is connected to the main water inlet (1) so that the cleaning liquid flowing out from the post-filter (3) can be transported to the reverse osmosis membrane filter (2) through the main water inlet (1); And / or, the second end of the circulation pipe (6) is connected to the main inlet water line (1) so that the liquid flowing out from the wastewater end of the reverse osmosis membrane filter element (2) is transported to the reverse osmosis membrane filter element (2) through the main inlet water line (1).

3. The water purifier according to claim 2, characterized in that, The water purifier also includes a water outlet pipe (9), the water outlet end of the post-filter (3) is connected to the water outlet pipe (9), the first end of the return pipe (5) is connected to the water outlet pipe (9), and a return valve (51) is provided on the return pipe (5), the return valve (51) is used to control the opening and closing of the return pipe (5); Alternatively, the water purifier may also include a water outlet pipe (9) and a first reversing valve (7), wherein the water outlet of the post-filter (3) is connected to the first interface of the first reversing valve (7), the first end of the return pipe (5) is connected to the second interface of the first reversing valve (7), and the water outlet pipe (9) is connected to the third interface of the first reversing valve (7), wherein the first interface of the first reversing valve (7) can be selectively connected to the second interface or the third interface.

4. The water purifier according to claim 2, characterized in that, The water purifier also includes a wastewater pipe (21), the wastewater end of the reverse osmosis membrane filter element (2) is connected to the wastewater pipe (21), the first end of the circulation pipe (6) is connected to the wastewater pipe (21), a cleaning valve (61) is provided on the circulation pipe (6) and the cleaning valve (61) is used to control the opening and closing of the cleaning pipe, and a wastewater valve (211) is provided on the wastewater pipe (21). And / or, the water purifier further includes a second reversing valve (8), the wastewater end of the reverse osmosis membrane filter (2) is connected to the first interface of the second reversing valve (8), the wastewater pipe (21) is connected to the second interface of the second reversing valve (8), and the first end of the circulation pipe (6) is connected to the third interface of the second reversing valve (8), wherein the first interface of the second reversing valve (8) can selectively connect to the second interface or the third interface.

5. The water purifier according to claim 2, characterized in that, The water purifier also includes a first one-way valve (52), which is installed on the return pipe (5) and is used to prevent water in the main inlet pipe (1) from flowing back into the return pipe (5); And / or, the water purifier further includes a second one-way valve (63), which is disposed on the circulation pipe (6) and is used to prevent water in the main inlet pipe (1) from flowing back into the circulation pipe (6).

6. The water purifier according to claim 2, characterized in that, The booster pump (12) of the water purifier is installed on the main water inlet (1), wherein the second end of the circulation pipe (6) is connected to the upstream end of the booster pump (12), and the booster pump (12) can drive the liquid circulation flow in the cleaning circuit; Alternatively, the water purifier may further include a circulation pump (62) disposed on the cleaning circuit and used to drive the liquid circulation flow within the cleaning circuit.

7. The water purifier according to claim 6, characterized in that, The booster pump (12) includes at least a first working level and a second working level. The booster pump (12) has a level adjustment module, which is configured to adjust the working level of the booster pump (12) to the first working level when the water purifier is in water production mode, and to adjust the working level of the booster pump (12) to the second working level when the water purifier is in cleaning mode. Wherein, the working pressure value and / or flow rate of the second working position is lower than the working pressure value and / or flow rate of the first working position.

8. The water purifier according to claim 1, characterized in that, The water purifier also includes a pre-filter (4), which contains a second cleaning agent (41). The inlet of the pre-filter (4) is connected to the inlet component so that the water in the inlet component dissolves the second cleaning agent (41) to form a cleaning solution. The outlet of the pre-filter (4) is connected to the inlet of the reverse osmosis membrane filter (2) through the main inlet channel (1) so that the cleaning solution in the pre-filter (4) can be transported to the reverse osmosis membrane filter (2) to clean the reverse osmosis membrane filter (2).

9. The water purifier according to any one of claims 1 to 8, characterized in that, The water purifier also includes a dirt collection component (64), which is disposed on the cleaning circuit and is capable of collecting impurities in the cleaning circuit; And / or, the water purifier further includes a flow control component (65) disposed on the circulation pipe (6) and used to regulate the amount 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).

10. The water purifier according to claim 9, characterized in that, The dirt collection component (64) is disposed on the circulation pipe (6); And / or, the dirt collection component (64) includes a housing (641) and a filter screen (642) disposed within the housing (641), the dirt collection component (64) having an inlet pipe (645) and an outlet pipe (646), the filter screen (642) dividing the space within the housing (641) into a first chamber (643) and a second chamber (644), wherein the first chamber (643) is connected to the inlet pipe (645), the second chamber (644) is connected to the outlet pipe (646), and the filter screen (642) intercepts impurities in the cleaning liquid in the first chamber (643); And / or, the dirt collection component (64) is also provided with a drain port (647) for discharging the collected impurities.

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