Central water purifier

Abstract

The invention relates to the field of water treatment equipment, and provides a central water purifier which comprises a barrel, a filter element, a first pipeline and a second pipeline, the barrel is provided with a water inlet and a water outlet; the filter element is arranged in the cylinder body and comprises a box body and a plurality of filter plates, and the filter plates are arranged at intervals and divide the interior of the box body into a plurality of water filter layers; the first pipeline penetrates into the box body and penetrates through the plurality of filter plates, and the plurality of water filter layers are communicated with the water inlet; the second pipeline penetrates into the box body and penetrates through the multiple filter plates, the second pipeline is communicated with the water outlet, and the second pipeline is used for filtering water in the water filter layer and then enabling the filtered water to enter the second pipeline. The problems that a traditional water purifier is low in filtering speed and prone to generating scale are solved.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment, and particularly to a central water purifier. Background Art

[0002] As an important water treatment equipment, central water purifiers are widely used in household, commercial and industrial fields to remove impurities in water and improve water quality. With the continuous improvement of people's pursuit of health and quality of life, the demand for central water purifiers has increased year by year. In the prior art, the core function of a central water purifier is to purify water through multi-stage filtration, and its design and structure directly affect the filtration efficiency and user experience. Traditional central water purifiers usually adopt a single or simple multi-layer filtration structure, combined with filter elements of different materials to remove harmful substances in water, so as to meet the user's demand for clean water sources.

[0003] In the prior art, in order to achieve efficient water purification, the following several conventional means are usually adopted: one is to set multiple filter meshes inside a single cylinder body, and use the gaps between the filter meshes to form step-by-step filtration; the second is to set multiple independent filter element modules inside the cylinder body, and each module is responsible for a specific type of filtration task; the third is to introduce a pipeline system to guide the untreated water to different filtration areas and then collect it at the water outlet for discharge. Although these means can achieve water purification to a certain extent, their design and structure have certain limitations.

[0004] In the actual use process of the central water purifier in the prior art, there is a problem that it is difficult to balance the filtration effect and the filtration speed. For example, in physical filtration, the filter element achieves the filtration effect through filter holes that allow water to pass through but block impurities from passing through. If the aperture of the filter hole is large, the filtration effect is poor, and if the aperture is small, the filtration speed is slow and a large amount of purified water cannot be obtained quickly. Moreover, in traditional water purifiers, impurities in the untreated water easily adhere to the inner wall of the water purifier to form scale, which needs to be cleaned regularly, and the user experience is not good. Summary of the Invention

[0005] In order to solve the problems of slow filtration speed and easy scale formation of traditional water purifiers, this application provides a central water purifier.

[0006] The central water purifier provided by this application adopts the following technical solutions: A central water purifier, comprising: A cylinder body, provided with a water inlet and a water outlet; A filter element, disposed inside the cylinder body, the filter element includes a box body and multiple filter plates, and the multiple filter plates are arranged at intervals and divide the interior of the box body into multiple water filtration layers; A first pipeline, penetrating into the box body and passing through multiple filter plates, and connecting the multiple water filtration layers with the water inlet; A second pipe penetrates into the box body and passes through multiple filter plates. The second pipe is communicated with the water outlet, and the second pipe is used for allowing the water in the water filtering layer to enter the inside of the second pipe after being filtered.

[0007] By adopting the above technical solution, the central water purifier can achieve rapid filtration of water flow. Specifically: The cylinder body serves as the main structure, and cooperates with the water inlet and the water outlet to complete the introduction and discharge of water flow. Multiple filter plates inside the filter element divide the inside of the box body into multiple water filtering layers. The first pipe passes through multiple filter plates and communicates the water filtering layers with the water inlet, realizing the diversion of unpurified water, enabling the water flow to be filtered in different water filtering layers, and improving the filtering speed; the second pipe is responsible for collecting the filtered water flow and guiding it to the water outlet for discharge, effectively preventing the mixing of unfiltered water and filtered water, and ensuring the purity of the discharged water quality.

[0008] The impurities in the unpurified water stay inside the box body, preventing the impurities from adhering to the inner wall of the cylinder body to form water scale.

[0009] The water in adjacent water filtering layers can share the same filter plate for filtration, saving costs.

[0010] Optionally, the central water purifier further includes a third pipe and a first valve; A first sewage discharge hole is provided at the bottom of the cylinder body, and the first valve is provided at the first sewage discharge hole. The third pipe penetrates into multiple water filtering layers and is used for communicating multiple water filtering layers with the first sewage discharge hole.

[0011] By adopting the above technical solution, the central water purifier is additionally provided with a third pipe and a first valve. The third pipe can communicate multiple water filtering layers with the first sewage discharge hole at the bottom of the cylinder body. This design enables, when sewage discharge is required, the impurities or sewage in the water filtering layer to be discharged from the first sewage discharge hole by opening the first valve, realizing the cleaning of the filter element.

[0012] Optionally, the cylinder body includes a cylinder cover and a cylinder body connected by threads; Both the water inlet and the water outlet are provided on the cylinder cover, and the first sewage discharge hole is provided at the bottom of the cylinder body; The first pipe is detachably connected to the cylinder cover; A connecting portion is provided on the inner bottom wall of the cylinder body, and one end of the third pipe is threadedly connected to the connecting portion.

[0013] By adopting the above technical solution, the cylinder body of the central water purifier is composed of a cylinder cover and a cylinder body connected by threads. This structural design facilitates the assembly and disassembly of the device, improving the convenience of maintenance and cleaning. The water inlet and the water outlet are arranged on the cylinder cover, and the first sewage discharge hole is arranged at the bottom of the cylinder body, realizing a reasonable planning of the water flow path and facilitating the smooth discharge of sewage. The first pipeline is detachably connected to the cylinder cover, and the connecting part on the inner bottom wall of the cylinder body is threadedly connected to one end of the third pipeline, which not only enhances the structural stability but also makes it easier to disassemble the filter element, the first pipeline, and the third pipeline, facilitating the replacement of components.

[0014] Optionally, a first water passing hole communicating with its interior is provided at the part where the second pipeline penetrates the filter plate; The second pipeline has a filtering section that penetrates into the box body, and the filtering section does not penetrate the filter plate; By adopting the above technical solution, the filtering section of the second pipeline penetrates into the box body, which can filter the water in the water filtering layer and improve the water quality purification effect. And a first water passing hole is arranged at the part where the second pipeline penetrates the filter plate, enabling the water in the water filtering layer to penetrate into the filter plate and enter the second pipeline through the first water passing hole. Through the above arrangement, the water in the water filtering layer can enter the second pipeline through different paths, improving the water purification efficiency. Optionally, the second pipeline has a filtering section that penetrates into the box body and penetrates the filter plate.

[0015] By adopting the above technical solution, the water in the water filtering layer needs to be purified by passing through the filter plate and the filtering section in sequence before entering the second pipeline, improving the water purification effect.

[0016] Optionally, the box body is a water-impermeable box body. One end of the second pipeline penetrates out of the box body and communicates with the water outlet. The water in the water filtering layer enters the interior of the second pipeline and is discharged through the water outlet without contacting the inner wall of the cylinder body.

[0017] By adopting the above technical solution, the box body of the central water purifier is designed as a water-impermeable structure, and the water in the water filtering layer will not contact the inner wall of the cylinder body after purification, reducing the requirement for the cleanliness of the inner wall of the cylinder body. At the same time, one end of the second pipeline penetrates out of the box body and communicates with the water outlet, realizing the direct diversion of the purified water in the water filtering layer, simplifying the water flow path, reducing the water resistance, and improving the water purification efficiency.

[0018] Optionally, the box body is a water-impermeable box body; or, the side wall of at least one layer of the water filtering layer from top to bottom is a filter wall capable of filtering; One end of the second pipeline penetrates out of the box body, and a second water passing hole is provided at the penetrating part for discharging the water in the second pipeline to the bottom of the cylinder body; The central water purifier further includes a fourth pipe, one end of which communicates with the inner bottom of the cylinder body, and the other end communicates with the water outlet.

[0019] By adopting the above technical solution, the second water passing hole is arranged at the penetrating part of the second pipe, so that the water in the water filtering layer can be discharged to the bottom of the cylinder body through the second water passing hole after being filtered, thereby realizing the storage of purified water and ensuring that a large amount of purified water can be provided immediately when using water. The arrangement of the fourth pipe realizes the function of collecting and guiding the water from the bottom of the cylinder body to the water outlet, ensuring that the stored purified water can be smoothly discharged from the water outlet.

[0020] Optionally, the second water passing hole is located above the filter element.

[0021] By adopting the above technical solution, the second water passing hole is arranged above the filter element, so that the stored purified water is not easy to flow back to the second pipe and even into the water filtering layer through the second water passing hole.

[0022] Optionally, the central water purifier further includes a second valve; A second sewage discharge hole is provided at the bottom of the cylinder body, and the second valve is provided at the second sewage discharge hole.

[0023] By adopting the above technical solution, the central water purifier is provided with a second sewage discharge hole at the bottom of the cylinder body and a second valve at the second sewage discharge hole. This design enables the central water purifier to have a more perfect sewage discharge function, effectively discharging the impurities and dirt accumulated at the bottom of the cylinder body, preventing blockage and pollution. For example, the long-term unused purified water stored in the cylinder body can be discharged by opening the second valve, avoiding the deterioration of the purified water due to long-term non-use.

[0024] Optionally, the central water purifier further includes a third valve; The first end of the second pipe penetrates out of the cylinder body, the third valve is arranged at the first end of the second pipe, and the first end of the second pipe is used for introducing a cleaning medium.

[0025] By adopting the above technical solution, the central water purifier is additionally provided with a third valve, which is arranged at the first end of the second pipe, and the first end of the second pipe can introduce a cleaning medium. This design realizes the function of reverse flushing of the filter element and cleaning of the inner wall of the cylinder body, effectively removing the impurities accumulated inside the filter element and inside the cylinder body, and improving the self-cleaning ability of the water purifier.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By arranging a plurality of filter plates distributed at intervals in the cylinder body to form a plurality of water filtering layers, and using the first pipe and the second pipe to communicate with the water inlet and the water outlet respectively, the diversion of water bodies is realized, and the filtering efficiency is improved; 2. The setting of the third pipe enables the water in the water filtering layer to be discharged through the third pipe, thereby being able to carry away the impurities in the water filtering layer and realizing the cleaning of the filter element. 3. By introducing a cleaning medium into the first end of the second pipe, the cleaning of both the filter element and the inner wall of the cylinder can be achieved simultaneously. Description of the Drawings

[0027] Figure 1 It is a schematic three-dimensional structure diagram of the central water purifier provided by the present application.

[0028] Figure 2 It is a schematic structural diagram of an embodiment of the central water purifier provided by the present application.

[0029] Figure 3 It is a schematic structural diagram of another embodiment of the central water purifier provided by the present application.

[0030] Figure 4 It is a schematic external view of the filtering unit of the central water purifier provided by the present application.

[0031] Figure 5 It is a schematic structural diagram of the filtering unit of the central water purifier provided by the present application.

[0032] Description of the Reference Numerals: 1. Cylinder; 11. Cylinder cover; 111. Water inlet; 112. Water outlet; 12. Cylinder body; 121. First sewage discharge hole; 122. Second sewage discharge hole; 2. Filter element; 21. Box body; 22. Filter plate; 23. Water filtering layer; 231. Filter wall; 3. First pipe; 31. First through hole; 4. Second pipe; 41. Filtering section; 42. First sub-pipe; 421. First water through hole; 43. Second sub-pipe; 44. Second water through hole; 45. Second valve; 46. Third valve; 5. Third pipe; 51. First valve; 52. Second through hole; 6. Sealing ring; 7. Fourth pipe; 8. Wrench. Detailed Embodiments

[0033] The following further elaborates on the present application in conjunction with the attached Figures 1 to 5 drawings.

[0034] As Figures 1 to 3 shown, an embodiment of the present application discloses a central water purifier, including a cylinder 1, a filter element 2, a first pipe 3, a second pipe 4, a third pipe 5, and a first valve 51.

[0035] Specifically, the cylinder body 1 includes a cylinder cover 11 and a cylinder body 12 connected by threads. The cylinder cover 11 is provided with a water inlet 111 and a water outlet 112. A first sewage discharge hole 121 is provided at the bottom of the cylinder body 12.

[0036] The filter element 2 is arranged inside the cylinder body 1. The filter element 2 includes a box body 21 and multiple filter plates 22. The box body 21 can be in a cylindrical structure. The multiple filter plates 22 are evenly spaced along the vertical direction inside the box body 21, and the inside of the box body 21 is divided into multiple water filtration layers 23.

[0037] One end of the first pipeline 3 is communicated with the water inlet 111, and the other end penetrates into the box body 21 and passes through the multiple filter plates 22. The first pipeline 3 is provided with a first through hole 31. Any one of the water filtration layers 23 is communicated with the first pipeline 3 through at least one first through hole 31, so that the unpurified raw water entering the first pipeline 3 from the water inlet 111 can flow into each water filtration layer 23 respectively.

[0038] The second pipeline 4 is communicated with the water outlet 112. One end of the second pipeline 4 penetrates into the box body 21 and passes through the multiple filter plates 22. The raw water in the water filtration layer 23 enters the second pipeline 4 after being filtered, so as to export the filtered purified water from the water outlet 112 subsequently.

[0039] Among them, the filtering method can be various. For example, the second pipeline 4 has a filtering section 41. The filtering section 41 penetrates into the box body 21, and the filtering section 41 does not penetrate through the filter plate 22. So that the water in the filtering layer can directly pass through the side wall of the filtering section 41 and enter the second pipeline 4, while the impurities in the water are blocked by the side wall of the filtering section 41.

[0040] Another example is as Figures 2 to 5 shown. The part of the second pipeline 4 penetrating through the filter plate 22 is provided with a first water through hole 421 communicated with its inside. The water in the water filtration layer 23 can penetrate into the filter plate 22 and enter the second pipeline 4 through the first water through hole 421. Specifically, the filtering section 41 is assembled by multiple filtering units. The filtering unit includes a first sub-pipe 42 and a second sub-pipe 43. The first sub-pipe 42 and the second sub-pipe 43 are integrally formed and coaxially connected. The outer diameter of the first sub-pipe 42 is smaller than the outer diameter of the second sub-pipe 43, so as to form a step at the connection of the two. Threads are provided on the outer wall of the first sub-pipe 42 and the inner wall of the second sub-pipe 43, so that the first sub-pipe 42 can be threadedly connected with the second sub-pipe 43 of other filtering units. The filter plate 22 is provided with a sleeving hole. The aperture of the sleeving hole is larger than the outer diameter of the first sub-pipe 42 and smaller than the outer diameter of the second sub-pipe 43, so that the filter plate 22 can be sleeved on the first sub-pipe 42, and the filter plate 22 can be clamped between two second sub-pipes 43, thereby realizing the stability of the structure. Sealing rings 6 are provided on both opposite sides of the second sub-pipe 43. The sealing rings 6 are sleeved on the first sub-pipe 42. The sealing rings 6 are used to improve the sealing effect and prevent the unfiltered water from directly passing through the first through hole 31.

[0041] For another example, the part of the second pipe 4 passing through the filter plate 22 is not provided with the first water passing hole 421, and the filtering section 41 of the second pipe 4 passes through the filter plate 22, so that the water in the water filtering layer 23 needs to pass through the filter plate 22 and the filtering section 41 respectively before entering the second pipe 4, which helps to improve the filtering effect.

[0042] The water entering the second pipe 4 can be directly led out of the water outlet 112, or can be first introduced into the cylinder body 1 for temporary storage and then led out of the water outlet 112 when needed.

[0043] Specifically, in the first case, as Figure 3 shown, one end of the second pipe 4 passes through the box body 21 and is communicated with the water outlet 112. The water in the water filtering layer 23 enters the inside of the second pipe 4 and is discharged through the water outlet 112 without contacting the inner wall of the cylinder body 1, so as to realize the rapid supply of purified water, and the purified water does not contact the inner wall of the cylinder body 1, reducing the requirement for the cleanliness inside the cylinder body 1. In the first case, the box body 21 is selected as a water-impermeable box body 21.

[0044] In the second case, as Figure 2 shown, one end of the second pipe 4 passes through the box body 21, and a second water passing hole 44 is provided at the passing part. The purified water in the second pipe 4 can be discharged to the bottom of the cylinder body 1 through the second water passing hole 44, so as to realize the storage of purified water. The central water purifier further includes a fourth pipe 7. One end of the fourth pipe 7 is communicated with the inner bottom of the cylinder body 1, and the other end is communicated with the water outlet 112. When the stored purified water is needed, the purified water can flow to the water outlet 112 through the second pipe 4. Among them, the height of the second water passing hole 44 should not be too low to avoid the stored purified water flowing back into the second pipe 4 through the second water passing hole 44. For example, the second water passing hole 44 can be located above the filter element 2.

[0045] In the second case, the box body 21 can be either water-permeable or not. When the box body 21 is a water-permeable box body 21, at least one side wall of the water filtering layer 23 arranged from top to bottom is set as a filter wall 231 capable of filtering, while other parts of the box body 21 are still water-impermeable structures. The water in the water filtering layer 23 can be filtered through the filter wall 231, so as to improve the purified water efficiency. Among them, the number of the water filtering layers 23 with the filter wall 231 can be determined according to the maximum purified water storage capacity set in the cylinder body 1, so that the stored purified water will not flow back into the water filtering layer 23 through the filter wall 231, reducing the probability that the stored purified water contaminates the raw water in the water filtering layer 23 and the purified water in the second pipe 4 after deterioration, and also avoiding the filtering structures such as the filter wall 231 being soaked in the deteriorated purified water for a long time.

[0046] Among the above, the filtering structures of the filter plate 22, the filtering section 41, and the filter wall 231 are not mandatorily limited. For example, the filtering structure may include a composite structure composed of a filtering material and multiple layers of filtering ceramic plates. Filtering materials are provided between any adjacent filtering ceramic plates, and the filtering materials can be filter cotton, activated carbon, etc.

[0047] One end of the third pipe 5 penetrates into multiple water filtering layers 23, and the other end is communicated with the first sewage discharge hole 121. A first valve 51 is provided at the first sewage discharge hole 121. A second through hole 52 communicated with the water filtering layer 23 is provided on the third pipe 5.

[0048] During the water purification process, the first valve 51 is in a closed state, and the water in the water filtering layer 23 cannot be discharged through the first sewage discharge hole 121. The impurities filtered out from the raw water in the water filtering layer 23 remain in the water filtering layer 23; when sewage discharge is required, the first valve 51 can be opened, and raw water is introduced into the water filtering layer 23 through the first pipe 3. The raw water can clean the water filtering layer 23 and flush the impurities into the third pipe 5 and finally discharge them.

[0049] It should be noted that by reasonably setting the number of layers of the water filtering layer 23 with the filter wall 231 above, the backflow of the stored purified water into the water filtering layer 23 is prevented, and it is also possible to avoid the loss of the stored purified water caused by the discharge of the stored purified water through the third pipe 5 when flushing the water filtering layer 23.

[0050] As Figure 2 shown, in some embodiments, the central water purifier further includes a second valve 45. A second sewage discharge hole 122 is provided at the bottom of the cylinder body 1, and a second valve 45 is provided at the second sewage discharge hole 122. Since the purified water stored in the cylinder body 1 may still deteriorate if it is not used for a long time. Therefore, the second valve 45 can be opened regularly to discharge the purified water that is about to deteriorate to avoid polluting the inside of the cylinder body 1.

[0051] As Figure 2 shown, in some embodiments, the central water purifier further includes a third valve 46. The first end of the second pipe 4 penetrates out of the cylinder body 1, and the third valve 46 is provided at the first end of the second pipe 4. The first end of the second pipe 4 is used for introducing a cleaning medium. Among them, the cleaning medium can be clean water (the water pressure can be selected according to actual needs) or compressed air, etc. For example, clean water is introduced into the second pipe 4, and a part of the clean water can be discharged from the second water through hole 44. Since the second water through hole 44 is located above the filter element 2, the clean water discharged from the second water through hole 44 can clean the outer surface of the filter element 2 and the inner wall of the cylinder body 1, and the waste water after cleaning can be discharged from the second sewage outlet; another part of the clean water can backwash the dirt in the filter wall 231, the filter plate 22, and the water filtering layer 23, and the waste water after flushing can be discharged from the first sewage outlet.

[0052] After rinsing with clean water, it can be decided whether to introduce compressed air according to actual needs. For example, when the central water purifier does not need to filter or store purified water for a long time in the future, compressed air can be introduced into the first end of the second pipe 4. In addition to cleaning the filter wall 231 and the filter plate 22, the compressed air can also dry the inside of the filter element 2 and the cylinder body 1, thereby slowing down the growth of bacteria.

[0053] The first pipe 3, the second pipe 4 and the fourth pipe 7 are all detachably connected to the cylinder cover 11. A connecting portion is provided on the inner bottom wall of the cylinder body 12, and one end of the third pipe 5 is threadedly connected to the connecting portion. Through the above settings, the filter element 2 can be prevented from shaking. Moreover, by only turning the cylinder cover 11, the third pipe 5 can be rotated relative to the connecting portion, so that the cylinder cover 11 together with the first pipe 3, the second pipe 4, the third pipe 5, the fourth pipe 7 and the filter element 2 can be removed together, which is convenient for replacing components. The central water purifier also includes tools such as a wrench 8 for opening the cylinder cover 11. A pressure relief hole is also provided at the top of the cylinder cover 11, and a pressure relief valve is provided at the pressure relief hole for relieving pressure when the pressure is too high.

Claims

1. A central water purifier, characterized in that: include: The cylinder (1) is provided with a water inlet (111) and a water outlet (112); A filter element (2) is arranged in the cylinder (1), the filter element (2) comprising a box body (21) and a plurality of filter plates (22), the plurality of filter plates (22) being arranged at intervals and dividing the interior of the box body (21) into a plurality of water filtering layers (23); A first pipe (3) penetrates into the box body (21) and passes through the plurality of filter plates (22), and connects the plurality of water filter layers (23) with the water inlet (111); The second pipe (4) penetrates into the box body (21) and passes through the plurality of filter plates (22). The second pipe (4) is connected to the water outlet (112). The second pipe (4) is used for filtering water in the water filter layer (23) and then entering the interior of the second pipe (4).

2. The central water purifier according to claim 1, characterized in that: The central water purifier further comprises a third pipeline (5) and a first valve (51); The bottom of the cylinder (1) is provided with a first drain hole (121), and the first drain hole (121) is provided with the first valve (51); The third pipe (5) penetrates into the plurality of water filtering layers (23) and is used to connect the plurality of water filtering layers (23) with the first sewage discharge hole (121).

3. The central water purifier according to claim 2, characterized in that: The cylinder (1) comprises a cylinder cover (11) and a cylinder body (12) which are threadedly connected; The water inlet (111) and the water outlet (112) are both arranged on the cylinder cover (11), and the first sewage discharge hole (121) is arranged on the bottom of the cylinder body (12); The first pipe (3) is detachably connected to the cylinder cover (11); A connecting portion is provided on the inner bottom wall of the barrel (12), and one end of the third pipe (5) is threadedly connected to the connecting portion.

4. The central water purifier according to claim 1, characterized in that: The portion of the second pipe (4) penetrating the filter plate (22) is provided with a first water hole (421) communicating with the interior thereof; The second pipe (4) has a filter section (41), the filter section (41) penetrates into the box body (21), and the filter section (41) does not penetrate the filter plate (22).

5. The central water purifier according to claim 1, characterized in that: The second pipe (4) has a filter section (41), and the filter section (41) penetrates into the box body (21) and passes through the filter plate (22).

6. The central water purifier according to claim 1, characterized in that: The box body (21) is a water-tight box body (21); one end of the second pipe (4) passes through the box body (21) and is connected to the water outlet (112); water in the water filter layer (23) enters the second pipe (4) and is discharged through the water outlet (112) without contacting the inner wall of the cylinder (1).

7. The central water purifier according to claim 1, characterized in that: The box body (21) is a water-impermeable box body (21); or, from top to bottom, at least one side wall of the water filter layer (23) is a filter wall (231) that can be used for filtering; One end of the second pipe (4) passes through the box body (21), and a second water hole (44) is provided at the passing portion, the second water hole (44) being used for allowing water in the second pipe (4) to be discharged to the bottom of the cylinder (1); The central water purifier further comprises a fourth pipe (7), one end of the fourth pipe (7) being in communication with the inner bottom of the cylinder (1), and the other end of the fourth pipe (7) being in communication with the water outlet (112).

8. The central water purifier according to claim 7, characterized in that: The second water hole (44) is located above the filter element (2).

9. The central water purifier according to claim 7, characterized in that: The central water purifier further comprises a second valve (45); The bottom of the cylinder (1) is provided with a second drain hole (122), and the second drain hole (122) is provided with the second valve (45).

10. The central water purifier according to claim 9, characterized in that: The central water purifier further comprises a third valve (46); The first end of the second pipe (4) passes through the cylinder (1), the third valve (46) is arranged at the first end of the second pipe (4), and the first end of the second pipe (4) is used to introduce a cleaning medium.

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