Filter self-cleaning structure of portable water purifier based on double spontaneous power supply
By designing an electric telescopic rod and a reverse osmosis plate cleaning system driven by a reducer motor in a portable water purifier, the problem of difficulty in cleaning the semi-permeable membrane surface impurities in sewage filtration is solved, and effective impurity cleaning and filter life are achieved.
Patent Information
- Application Number
- CN202411704184.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2044-11-26
AI Technical Summary
During the sewage filtration process, impurities attached to the surface of the semipermeable membrane are difficult to clean, resulting in damage to the semipermeable membrane and failure of the filtration function.
A filter self-cleaning structure based on dual self-powered portable water purifier was designed. The reverse osmosis plate was driven to rotate with electric telescopic rod and reducer motor. Combined with the sliding of springs and sliders, gas was used to push the cleaning of the flexible filter plate. impurities.
It realizes effective cleaning of impurities on the surface of semi-permeable membrane, avoids semi-permeable membrane damage, extends the service life of the filter, and improves the filtration efficiency of the water purifier.
Smart Images

Figure CN119430332A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of portable water purifiers, and in particular to a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply. Background Art
[0002] The outdoor water purifier manually purifies surface water such as river, lake, sea water, rainwater and groundwater into clean water that can be directly drunk. The product uses replaceable pre-filter ultrafiltration membrane elements and reverse osmosis elements for multi-stage filtration, and the necessary working pressure is provided by a manual pump. Since the working principle of the reverse osmosis membrane requires appropriate pressure, when using reverse osmosis elements for water purification, it is necessary to apply appropriate pressure to the water source: the manual pump, which is the core technology of this product, adopts a patented double-plunger structure, which can generate higher pressure and improve water output efficiency. Product advantages: light weight, small size, easy to carry and use. The patented double-plunger structure manual pump is highly efficient, corrosion-resistant and has a long life. The original button-type exhaust and drainage design can easily and quickly discharge the gas from the pump body, improve the water lifting and water output efficiency of the pump, and can work normally in both vertical and inclined positions; it is convenient and flexible to carry and use. The ultrafiltration and reverse osmosis membrane elements are of the same size and can be replaced. The product is suitable for outdoor activities and drinking water supply in various emergency situations, such as wilderness survival, outdoor adventures and natural disasters. It can be equipped with large and small boats, yachts, and life rafts in rivers, lakes, and provide emergency drinking water. It can treat surface water and groundwater such as river water, rainwater, and fish pond water.
[0003] In the process of using a water purifier to purify sewage, filtration is usually used to purify it. In addition, due to the high requirements for water quality, a semipermeable membrane is generally used to filter sewage. During the filtration process, more impurities will adhere to the surface of the semipermeable membrane. Since the semipermeable membrane is made of a flexible material, scraping during cleaning will cause damage to the semipermeable membrane, making it impossible to filter.
[0004] Therefore, an improvement is made and a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply is proposed. Summary of the invention
[0005] The purpose of the present invention is to solve the problem of cleaning impurities attached to the surface of a semipermeable membrane in the existing sewage filtration process.
[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply to solve the above-mentioned problem.
[0007] The specific application is as follows:
[0008] It comprises an outer shell, wherein a reverse osmosis filter 1 and a reverse osmosis filter 2 are fixedly connected to the inner bottom surface of the outer shell, wherein the reverse osmosis filter 1 and the reverse osmosis filter 2 comprise a sleeve, wherein the lower surface of the sleeve is connected to a connecting block, wherein the lower surface of the connecting block is connected to a filter barrel, wherein the inner wall of the filter barrel is fixedly connected to a reverse osmosis barrel, wherein the inner wall of the reverse osmosis barrel is fixedly connected to a baffle, wherein a slide groove is arranged between the reverse osmosis barrel and the baffle, wherein the inner wall of the slide groove is slidably connected to a slider, wherein one side of the slider is fixedly connected to a spring, wherein the other end of the spring is fixedly connected to a reverse osmosis plate 1, wherein a side surface of the reverse osmosis plate 1 comprises a telescopic ring and a threaded ring, wherein the threaded ring is threadedly connected to the reverse osmosis barrel, wherein the reverse osmosis plate 1 is rotatably connected to the reverse osmosis plate 2 close to the spring surface, wherein the reverse osmosis plate 1 and the reverse osmosis plate 2 are both composed of a solid plate and a filter plate.
[0009] As a preferred technical solution of the present application, the reverse osmosis plate is fixedly connected to an electric telescopic rod away from the spring surface, the electric telescopic rod is fixedly connected to a reduction motor away from the spring end, the reverse osmosis barrel is fixedly connected to a fixing ring away from the spring surface, and the fixing ring is connected to the water outlet.
[0010] As a preferred technical solution of the present application, the spring passes through the reverse osmosis barrel and reverse osmosis plate 2 and is fixedly connected to reverse osmosis plate 1, and the reverse osmosis plate 1 and reverse osmosis plate 2 solid plates are staggeredly distributed with the filter plate.
[0011] As a preferred technical solution of the present application, a pre-treatment filter 1, a pre-treatment filter 2, a post-filter and a self-cleaning filter are fixedly connected to the inner bottom surface of the shell.
[0012] As a preferred technical solution of the present application, a box cover is hingedly connected to the upper surface of the shell, indicator lights and operation buttons are respectively provided on the sides of the shell, and a solar interface and a USB interface are provided on the shell away from the indicator light surface.
[0013] As a preferred technical solution of the present application, a plurality of universal wheels are fixedly connected to the other side surface of the shell, and a pull rod is slidably connected to the shell away from the universal wheel surface.
[0014] As a preferred technical solution of the present application, a rocker is arranged on the outer shell near the pull rod surface, and the rocker penetrates the outer shell and is rotatably connected to the power generation component, and the power generation component is arranged on the inner surface of the battery.
[0015] As a preferred technical solution of the present application, a solar cell panel is abutted against the outer surface of the battery, and the solar cell panel is foldably arranged on the outer surface of the battery.
[0016] As a preferred technical solution of the present application, the filter barrel and the reverse osmosis barrel are both contracted from close to the connection block to the other end, and the contracted end is connected to the water outlet.
[0017] As a preferred technical solution of the present application, the output end of the pretreatment filter 1 is connected to the pretreatment filter 2, the output end of the pretreatment filter 2 is connected to the post-filter, the output end of the post-filter is connected to the self-cleaning filter, and the output end of the cleaning filter is respectively connected to the reverse osmosis filter 1 and the reverse osmosis filter 2.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] In the scheme of this application:
[0020] 1. When cleaning the reverse osmosis plate 1 and the reverse osmosis plate 2, the reduction motor can be turned on. After the reduction motor is turned on, it drives the electric telescopic rod to rotate, and then drives the reverse osmosis plate 1 to rotate. During the rotation of the reverse osmosis plate 1, its core plate part fits with the filter plate part of the reverse osmosis plate 2, thereby achieving the seal between the reverse osmosis plate 1 and the reverse osmosis plate 2. Then the electric telescopic rod contracts, driving the spring and the slider to slide. During the sliding process, the slider drives the gas inside the slide slot to push, and the pushed gas cleans the flexible filter plate;
[0021] 2. During filtration, the sewage is pretreated by pretreatment filter 1, and then the treated sewage enters pretreatment filter 2 for secondary treatment. After that, the sewage enters the post-filter and self-cleaning filter for filtration to filter out most of the impurities inside the sewage. Then, it enters reverse osmosis filter 1 and reverse osmosis filter 2 for osmotic filtration to purify the sewage. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A schematic diagram of the overall structure of a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided by the present application;
[0023] Figure 2 A schematic diagram of the back structure of a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided by the present application;
[0024] Figure 3 A schematic diagram of a reverse osmosis filtration device with a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided in this application;
[0025] Figure 4 A schematic diagram of the reverse osmosis barrel structure of a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided in this application;
[0026] Figure 5 A schematic diagram of the reverse osmosis barrel structure of a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided in this application;
[0027] Figure 6A schematic diagram of an explosion of a reverse osmosis barrel of a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided in this application;
[0028] Figure 7 A schematic diagram of a filtering device with a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided in this application;
[0029] Figure 8 A schematic diagram of a power supply device for a filter self-cleaning structure of a portable water purifier based on dual self-powered power provided in the present application.
[0030] Indicated in the figure:
[0031] 1. Shell; 101. Reverse osmosis filter 1; 102. Reverse osmosis filter 2; 103. Sleeve; 104. Connecting block; 105. Filter barrel; 106. Reverse osmosis barrel; 107. Baffle; 108. Slide; 109. Slider; 110. Spring; 111. Reverse osmosis plate 1; 112. Telescopic ring; 113. Threaded ring; 114. Reverse osmosis plate 2; 115. Solid plate; 116. Filter plate;
[0032] 201, electric telescopic rod; 202, reduction motor; 203, fixing ring;
[0033] 4. Pretreatment filter 1; 401. Pretreatment filter 2; 402. Post-filter; 403. Self-cleaning filter;
[0034] 5. Box cover; 501. Indicator light; 502. Operation button; 503. Solar interface; 504. USB interface;
[0035] 6. Universal wheel; 601. Pull rod;
[0036] 7. Joystick; 701. Battery;
[0037] 8. Solar panels. DETAILED DESCRIPTION
[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0039] As mentioned in the background art, during sewage filtration, impurities attached to the surface of the flexible semipermeable membrane are difficult to clean.
[0040] In order to solve this technical problem, the present invention provides a filter self-cleaning structure of a portable water purifier based on dual self-powered power supply, which is used to clean the surface of a semipermeable membrane during the filtration process.
[0041] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0044] A filter self-cleaning structure of a portable water purifier based on dual self-powered power specifically includes a shell 1, a reverse osmosis filter 101 and a reverse osmosis filter 2 102 are fixedly connected to the inner bottom surface of the shell 1, the reverse osmosis filter 101 and the reverse osmosis filter 2 102 include a sleeve 103, the lower surface of the sleeve 103 is connected to a connecting block 104, the lower surface of the connecting block 104 is connected to a filter barrel 105, the inner wall of the filter barrel 105 is fixedly connected to a reverse osmosis barrel 106, the inner wall of the reverse osmosis barrel 106 is fixedly connected to a baffle 107, and the reverse osmosis barrel 106 is fixedly connected to the reverse osmosis barrel 106. A slide groove 108 is arranged between the baffles 107, and a slider 109 is slidably connected to the inner wall of the slide groove 108, and a spring 110 is fixedly connected to one side of the slider 109, and a reverse osmosis plate 111 is fixedly connected to the other end of the spring 110. The side of the reverse osmosis plate 111 includes a telescopic ring 112 and a threaded ring 113, and the threaded ring 113 is threadedly connected to the reverse osmosis barrel 106. The reverse osmosis plate 111 is rotatably connected to the reverse osmosis plate 2 114 near the spring 110 surface, and the reverse osmosis plate 111 and the reverse osmosis plate 2 114 are both composed of a solid plate 115 and a filter plate 116.
[0045] When cleaning the reverse osmosis plate 111 and the reverse osmosis plate 114, the reduction motor 202 can be turned on. After the reduction motor 202 is turned on, it drives the electric telescopic rod 201 to rotate, and then drives the reverse osmosis plate 111 to rotate. During the rotation of the reverse osmosis plate 111, its core plate 115 part fits with the filter plate 116 part of the reverse osmosis plate 114, so as to achieve the sealing between the reverse osmosis plate 111 and the reverse osmosis plate 114. Then the electric telescopic rod 201 contracts, driving the spring 110 and the slider 109 to slide. During the sliding process, the slider 109 drives the gas inside the slide groove 108 to push, and the pushed gas cleans the flexible filter plate 116.
[0046] The reverse osmosis plate 111 is fixedly connected to an electric telescopic rod 201 away from the spring 110, and the electric telescopic rod 201 is fixedly connected to a reduction motor 202 away from the spring 110. The reverse osmosis barrel 106 is fixedly connected to a fixing ring 203 away from the spring 110, and the fixing ring 203 is connected to the water outlet.
[0047] The spring 110 penetrates the reverse osmosis barrel 106 and the reverse osmosis plate 2 114 and is fixedly connected to the reverse osmosis plate 1 111 . The reverse osmosis plate 1 111 and the reverse osmosis plate 2 114 , the solid plate 115 and the filter plate 116 are staggered.
[0048] The electric telescopic rod 201 fixedly connected to the surface of the reverse osmosis plate 111 away from the spring 110 is used to control the stretching of the reverse osmosis plate 111 to form a negative pressure. The reduction motor 202 fixedly connected to the end of the electric telescopic rod 201 away from the spring 110 is used to drive the electric telescopic rod 201 to rotate. During the rotation, the electric telescopic rod 201 drives the reverse osmosis plate 111 to rotate and is misaligned with the reverse osmosis plate 2 114 so that a sealed environment is formed between the reverse osmosis plate 111 and the reverse osmosis plate 2 114, so that the reverse osmosis plate 111 and the reverse osmosis plate 2 114 can be cleaned.
[0049] The inner bottom surface of the housing 1 is fixedly connected with a pre-treatment filter 1 4 , a pre-treatment filter 2 401 , a post-filter 402 and a self-cleaning filter 403 .
[0050] The treatment filter 1 fixedly connected to the inner bottom surface of the shell 1 is used for primary filtration of sewage, the treatment filter 2 is used for secondary filtration of the sewage filtered by the primary filtration, and the post-filter 402 and the self-cleaning filter 403 circulate and purify the clean water to filter out most of the impurities inside the sewage.
[0051] A box cover 5 is hinged on the upper surface of the housing 1 , an indicator light 501 and an operation button 502 are respectively arranged on the side of the housing 1 , and a solar interface 503 and a USB interface 504 are arranged on the side of the housing 1 away from the indicator light 501 .
[0052] The box cover 5 hinged on the upper surface of the shell 1 is used to isolate the shell 1, the indicator light 501 set on the side of the shell 1 is used to remind the operator of the sewage purification process, the operation button 502 set on the side of the shell 1 is used to control the operation of the filtering component inside the shell 1, and the solar interface 503 and USB interface 504 set on the side of the shell 1 away from the indicator light 501 are used to connect to the power output interface to realize solar power supply.
[0053] A plurality of universal wheels 6 are fixedly connected to the other side of the housing 1 , and a pull rod 601 is slidably connected to the surface of the housing 1 away from the universal wheels 6 .
[0054] A rocker 7 is provided on the surface of the housing 1 close to the pull rod 601 . The rocker 7 penetrates the housing 1 and is rotatably connected to the power generation component. The power generation component is provided on the inner surface of the storage battery 701 .
[0055] Multiple outward wheels fixedly connected to the other side of the shell 1 are used to control the movement of the shell 1. When moving, the shell 1 can be pulled to pull the device. The rocker 7 arranged on the surface of the shell 1 close to the pull rod 601 is used to operate the power generation component by hand cranking, thereby realizing power generation of the device.
[0056] A solar cell panel 8 is in contact with the outer surface of the storage battery 701 . The solar cell panel 8 is foldably arranged on the outer surface of the storage battery 701 .
[0057] The solar cell panel 8 abutting against the outer surface of the storage battery 701 is used to absorb solar energy to realize power supply. The solar cell panel 8 is foldably arranged on the outer surface of the storage battery 701 so as to be quickly disassembled and realize power supply through solar energy.
[0058] The filter tank 105 and the reverse osmosis tank 106 are both contracted from close to the connection block 104 to the other end, and the contracted end is communicated with the water outlet.
[0059] The filter barrel 105 and the reverse osmosis barrel 106 are contracted from the connection block 104 to the other end so as to discharge the sewage. The contracted end has a smaller diameter, which causes the water to be discharged faster, thereby accelerating the discharge of clean water.
[0060] The output end of the pretreatment filter 4 is connected to the pretreatment filter 2 401, the output end of the pretreatment filter 2 401 is connected to the post filter 402, the output end of the post filter 402 is connected to the self-cleaning filter 403, and the output ends of the cleaning filters are respectively connected to the reverse osmosis filter 101 and the reverse osmosis filter 2 102.
[0061] During filtration, the sewage is pretreated by pretreatment filter 1 4, and then the treated sewage enters pretreatment filter 2 401 for secondary treatment. After that, the sewage enters post-filter 402 and self-cleaning filter 403 for filtration to filter out most of the impurities inside the sewage, and then enters reverse osmosis filter 1 101 and reverse osmosis filter 2 102 for osmotic filtration to purify the sewage.
[0062] The use process of the filter self-cleaning structure of a portable water purifier based on dual self-powered power supply provided by the present invention is as follows:
[0063] When cleaning the reverse osmosis plate 111 and the reverse osmosis plate 114, the reduction motor 202 can be turned on. After the reduction motor 202 is turned on, it drives the electric telescopic rod 201 to rotate, and then drives the reverse osmosis plate 111 to rotate. During the rotation of the reverse osmosis plate 111, its core plate 115 part fits with the filter plate 116 part of the reverse osmosis plate 114, so as to achieve the sealing between the reverse osmosis plate 111 and the reverse osmosis plate 114. Then the electric telescopic rod 201 contracts, driving the spring 110 and the slider 109 to slide. During the sliding process, the slider 109 drives the gas inside the slide groove 108 to push, and the pushed gas cleans the flexible filter plate 116.
[0064] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0065] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.
Claims
1. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply, characterized in that: The invention comprises a shell (1), wherein a reverse osmosis filter 1 (101) and a reverse osmosis filter 2 (102) are fixedly connected to the inner bottom surface of the shell (1), wherein the reverse osmosis filter 1 (101) and the reverse osmosis filter 2 (102) comprise a sleeve (103), wherein the lower surface of the sleeve (103) is connected to a connecting block (104), wherein the lower surface of the connecting block (104) is connected to a filter barrel (105), wherein the inner wall of the filter barrel (105) is fixedly connected to a reverse osmosis barrel (106), wherein the inner wall of the reverse osmosis barrel (106) is fixedly connected to a baffle (107), and a slide groove (106) is provided between the reverse osmosis barrel (106) and the baffle (107). 8), the inner wall of the slide groove (108) is slidably connected to a slider (109), one side of the slider (109) is fixedly connected to a spring (110), the other end of the spring (110) is fixedly connected to a reverse osmosis plate 1 (111), the side of the reverse osmosis plate 1 (111) includes a telescopic ring (112) and a threaded ring (113), the threaded ring (113) is threadedly connected to the reverse osmosis barrel (106), the reverse osmosis plate 1 (111) is rotatably connected to a reverse osmosis plate 2 (114) near the spring (110), and the reverse osmosis plate 1 (111) and the reverse osmosis plate 2 (114) are both composed of a solid plate (115) and a filter plate (116).
2. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 1, characterized in that: The reverse osmosis plate (111) is fixedly connected to a surface away from the spring (110) with an electric telescopic rod (201), and the electric telescopic rod (201) is fixedly connected to a reduction motor (202) at its end away from the spring (110). The reverse osmosis barrel (106) is fixedly connected to a surface away from the spring (110) with a fixing ring (203), and the fixing ring (203) is in communication with a water outlet.
3. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 1, characterized in that: The spring (110) penetrates the reverse osmosis barrel (106) and the second reverse osmosis plate (114) and is fixedly connected to the first reverse osmosis plate (111); the first reverse osmosis plate (111) and the second reverse osmosis plate (114) solid plate (115) and filter plate (116) are staggered.
4. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 1, characterized in that: The inner bottom surface of the housing (1) is fixedly connected with a pre-treatment filter 1 (4), a pre-treatment filter 2 (401), a post-filter (402) and a self-cleaning filter (403).
5. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 5, characterized in that: A box cover (5) is hingedly connected to the upper surface of the housing (1); an indicator light (501) and an operation button (502) are respectively arranged on the side of the housing (1); and a solar interface (503) and a USB interface (504) are arranged on the side of the housing (1) away from the indicator light (501).
6. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 1, characterized in that: A plurality of universal wheels (6) are fixedly connected to the other side of the housing (1), and a pull rod (601) is slidably connected to the surface of the housing (1) away from the universal wheels (6).
7. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 6, characterized in that: The outer shell (1) is provided with a rocker (7) near the pull rod (601), and the rocker (7) penetrates the outer shell (1) and is rotatably connected to the power generation component, and the power generation component is arranged on the inner surface of the storage battery (701).
8. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 7, characterized in that: The outer surface of the storage battery (701) is abutted against a solar cell panel (8), and the solar cell panel (8) is foldably arranged on the outer surface of the storage battery (701).
9. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 1, characterized in that: The filter barrel (105) and the reverse osmosis barrel (106) are both contracted from close to the connection block (104) to the other end, and the contracted end is communicated with the water outlet.
10. A filter self-cleaning structure of a portable water purifier based on dual self-powered power supply according to claim 4, characterized in that: The output end of the pre-treatment filter 1 (4) is connected to the pre-treatment filter 2 (401), the output end of the pre-treatment filter 2 (401) is connected to the post-filter (402), the output end of the post-filter (402) is connected to the self-cleaning filter (403), and the output end of the cleaning filter is respectively connected to the reverse osmosis filter 1 (101) and the reverse osmosis filter 2 (102).
Citation Information
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