A water distribution device

Abstract

The utility model relates to a water distribution device, including jar body and water distribution subassembly, the end of jar body is equipped with jar mouth, and water distribution subassembly reaches the inside of jar body through jar mouth, water distribution subassembly includes center tube and the flexible deflector group of center tube upper sleeve setting, and the both ends of center tube are equipped with water outlet, and the flexible deflector group is located between two water outlets, and the water outlet of center tube carries out water through upper water distributor and lower water distributor, and upper water distributor sets up close to jar mouth direction, the sum of the cross section of upper water distributor, lower water distributor and center tube is not greater than the cross section area of jar mouth. The cross section area of flexible deflector group is greater than the cross section area of jar mouth under the natural unfolding state, and the flexible deflector group includes first flexible deflector and second flexible deflector, and the first installation ring groove and second installation ring groove are equipped with interval on center tube, and first flexible deflector is set in first installation ring groove, and second flexible deflector is set in second installation ring groove.

Description

Technical Field

[0001] This utility model relates to the technical field of water distribution devices, and in particular to a water distribution device. Background Technology

[0002] In industrial water treatment and domestic water softening equipment, the uniformity of water distribution in the resin tank directly determines the softening efficiency and the lifespan of the resin. Traditional water distribution devices use a rigid guide plate design, whose circular planar structure is limited by the diameter of the resin tank opening, causing the water flow to diffuse only within a limited area. When handling high-flow conditions and requiring a larger tank opening, leakage can occur due to water pressure fluctuations in the sealing gap between the rigid guide plate and the tank opening. This contradiction has long constrained the improvement of equipment performance. Utility Model Content

[0003] To address the problem that the area of ​​the guide plate in existing water distribution devices is limited by the area of ​​the tank opening and cannot meet industrial needs, this utility model provides a water distribution device.

[0004] The present invention provides a water distribution device, characterized in that it includes a tank and a water distribution assembly. The tank has an opening at one end, and the water distribution assembly extends into the tank through the opening. The water distribution assembly includes a central pipe and a flexible guide plate assembly fitted onto the central pipe. The central pipe has water outlets at both ends, and the flexible guide plate assembly is located between the water outlets. The cross-sectional area of ​​the flexible guide plate assembly in its naturally unfolded state is larger than the cross-sectional area of ​​the tank opening.

[0005] Preferably, it further includes an upper water distributor and a lower water distributor respectively provided for the two water outlets, and the water outlet of the central pipe is discharged through the upper water distributor and the lower water distributor. The upper water distributor is provided close to the tank opening. The sum of the cross-sections of the upper water distributor, the lower water distributor and the central pipe is not greater than the cross-sectional area of ​​the tank opening.

[0006] Preferably, the flexible guide plate assembly has water-dividing holes arranged in an array.

[0007] Preferably, the flexible guide plate assembly includes multiple flexible guide plates arranged longitudinally on the central tube.

[0008] Preferably, the flexible guide plate assembly includes a first flexible guide plate and a second flexible guide plate. The first flexible guide plate is sleeved on the side of the central pipe near the upper water distributor, and the second flexible guide plate is sleeved on the side of the central pipe near the lower water distributor. A first mounting annular groove and a second mounting annular groove are provided at intervals on the central pipe. The first flexible guide plate is sleeved in the first mounting annular groove, and the second flexible guide plate is sleeved in the second mounting annular groove.

[0009] Preferably, at least some of the water distribution holes are of uneven size and distributed in different locations.

[0010] Preferably, the upper end of the upper water distributor is provided with a slot for connecting the water inlet pipe; the lower part of the upper water distributor has a trumpet-shaped structure and is provided with several evenly spaced slits.

[0011] Preferably, the water distributor includes a first cover and a second cover, the first cover being disposed above the second cover, and the two being connected by fasteners on their respective inner surfaces, and the first cover and the second cover having a plurality of evenly distributed slits.

[0012] Preferably, the upper water distributor and the lower water distributor are fitted onto the central pipe.

[0013] Preferably, the central tube has a hollow structure and is used to transport water or regenerated liquid.

[0014] Compared with the prior art, the water distribution device provided by this utility model has the following advantages: 1. Utilizing a flexible guide plate design, it overcomes the limitations of traditional rigid guide plates restricted by the tank opening diameter. When the water distribution assembly is installed through the tank opening, the flexible guide plate can be folded and compressed, unfolding inside the tank to form a structure larger than the cross-sectional area of ​​the tank opening, achieving uniform water flow distribution throughout the resin tank. Compared to traditional circular planar guide plates, this significantly increases the water distribution coverage area, effectively solving the problem of low local resin utilization under high flow conditions, while avoiding the risk of sealing leaks caused by enlarged tank openings, thus extending the continuous operation cycle of the equipment.

[0015] 2. The cross-sectional areas of the upper and lower water distributors and the central pipe are adapted to the tank opening size. Because a flexible guide plate is used, it is only necessary to ensure that the cross-sectional areas of the water distributors and the central pipe are compatible with the tank opening. This resolves the contradiction between large-diameter water distribution and sealing performance. While ensuring smooth installation of the water distribution components, the size of the connection to the tank opening is minimized. Under water pressure fluctuations, leakage is controlled to an extremely low level. Furthermore, during equipment retrofitting, this design allows the processing flow rate to be increased without modifying the tank opening, reducing equipment upgrade and modification costs.

[0016] 3. The array of water-distributing holes on the surface of the flexible guide plate achieves secondary dispersion of water flow. The channels create a high-speed jet as water flows through, forming a uniformly distributed micro-water curtain above the resin layer. Compared to traditional non-perforated guide plates, this increases the water penetration depth, ensuring that the deep resin fully participates in the ion exchange reaction. The arrangement of the water-distributing holes also effectively buffers fluctuations in inlet water pressure, maintaining a high degree of water distribution uniformity even when the system flow rate changes.

[0017] 4. A multi-flexible guide vane combination design constructs a gradient water distribution system. Through the stacked arrangement of multiple guide vanes, multi-stage diffusion of water flow is achieved. This structure allows for selection of the number of guide vanes based on the treated water volume. Additionally, the number of annular grooves can be increased on the central pipe. This reduces the number of flexible guide vanes under low flow conditions and increases them under high flow conditions, expanding the equipment's processing capacity and making it suitable for water treatment under various conditions.

[0018] 5. The dual-layer flow guide structure achieves precise positioning through an independently installed annular groove design with dual flexible guide plates. The upper guide plate adjusts the radial diffusion angle of the water flow, while the lower guide plate controls the axial flow velocity, forming a three-dimensional water distribution network. The synergistic effect of the two plates ensures that the water flow forms a uniform water film on the resin layer surface, reducing local turbulence intensity and significantly improving the stability of softening efficiency. The independently installed structure also facilitates the replacement of different guide plates according to water quality characteristics, adapting to complex operating conditions.

[0019] 6. Differentiated water distribution hole design enables customized water flow intensity for different areas of the resin tank. The water flow rate is adjusted by regulating the pore density to address the differences in ion exchange efficiency in different areas of the resin tank. This precise water distribution control extends the overall lifespan of the resin, reduces brine consumption, and significantly lowers operating costs.

[0020] 7. The combined design of the slotted water inlet connection and the trumpet-shaped lower water distribution structure achieves a smooth transition and uniform diffusion of water flow. The slotted connection at the water inlet ensures pipe concentricity and prevents flow deviation; the trumpet-shaped diffusion structure forms an umbrella-shaped water film, expanding the initial diffusion range compared to traditional straight-pipe water distribution. The gap at the bottom of the water distributor divides the water flow into a uniform thin water layer and effectively prevents resin particles from entering the water distribution system and causing blockages, thus extending maintenance cycles.

[0021] 8. The double-layered, snap-fit ​​lower water distributor design features two layers combined into a near-elliptical structure with several slits on its surface. This allows water to diffuse throughout the tank without dead angles, significantly improving water treatment efficiency. The snap-fit ​​connection structure enables easy assembly and disassembly, shortening maintenance time. Independent double-layered filter slits effectively prevent resin particles from entering the water distribution system and causing blockages, reducing the risk of contamination.

[0022] 9. The socket-type connection design between the water distributor and the central tube enables modular assembly. This ensures the coaxiality of the water distributor and the central tube, avoiding water distribution deviations caused by eccentricity. The modular structure improves production assembly efficiency and facilitates the replacement of different types of water distributors to adapt to changes in resin types. This connection method maintains excellent sealing performance even under long-term vibration environments, improving equipment operational reliability.

[0023] 10. The hollow central tube design creates a water distribution channel, which can handle the backflow during the softening process. The hollow structure also serves as a transport channel for the resin regeneration liquid during the regeneration process, realizing an integrated design of water distribution and regeneration, and improving the compactness of the equipment structure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a water distribution device provided in an embodiment of this utility model.

[0026] Figure 2 This is an exploded view of a water distribution component provided in an embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of a flexible guide plate provided in an embodiment of this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of an upper water distributor provided in an embodiment of this utility model.

[0029] Figure 5 This is a schematic diagram of the structure of a lower water distributor provided in an embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of a water distribution hole layout provided in an embodiment of the present utility model.

[0031] Figure 7 This is a schematic diagram of a water distribution hole layout provided in an embodiment of the present utility model.

[0032] Figure 8 This is a schematic diagram of the water flow trajectory during a water softening process provided in an embodiment of this utility model.

[0033] Figure 9 This is a schematic diagram of the water flow trajectory during a resin reduction process provided in an embodiment of this utility model.

[0034] Explanation of reference numerals in the attached diagram: 100. Water distribution device; 1. Water distribution assembly; 11. Upper water distributor; 111. Slot; 112. First mounting hole; 12. Lower water distributor; 121. First cover; 1211. Second mounting hole; 122. Second cover; 123. Clip; 13. Flexible guide plate assembly; 131. First flexible guide plate; 1311. Water distribution hole; 132. Second flexible guide plate; 14. Central pipe; 141. First mounting ring groove; 142. Second mounting ring groove; 2. Tank body; 21. Tank opening; 22. Tank body; 23. Base. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0036] It should be noted that the terms "first" and "second" in the specification and claims of this utility model are used to distinguish different objects, rather than to describe a specific order.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0041] Please see Figure 1 and Figure 2 This utility model provides a water distribution device 100, including a tank 2 and a water distribution component 1. In actual use, resin is placed inside the tank 2, and water flows into the tank 2 and is evenly dispersed by the water distribution component 1. After circulation, it flows out. It is generally used in water softening equipment for water softening. This embodiment aims to solve the problem of efficient and uniform resin reduction without making major modifications to the tank 2.

[0042] The tank body 2 has an opening 21 at one end, through which the water distribution assembly 1 extends into the tank body 2. The water distribution assembly 1 includes a central pipe 14 and a flexible guide plate assembly 13 fitted onto the central pipe 14. The central pipe 14 has outlet ends at both ends, and the flexible guide plate assembly 13 is located between the two outlet ends. The cross-sectional area of ​​the flexible guide plate assembly 13 in its naturally unfolded state is larger than the cross-sectional area of ​​the opening 21. Because the flexible guide plate assembly 13 is made of a flexible material, it can be folded and enter the tank body 2 through the opening 21. The guide plate is made of flexible materials such as rubber or silicone, possessing good flexibility and elasticity, allowing it to fold or roll when passing through the narrow opening 21 and unfold flat after entering the tank. The use of flexible materials allows the guide plate to adapt to openings 21 of different sizes, improving the product's versatility and flexibility, and reducing installation costs and difficulty.

[0043] Please see Figure 1 The tank body 2 includes a tank opening 21, a tank body 22 and a base 23. The tank body 22 is the main structure of the tank body 2. The end of the tank body 22 is provided with a tank opening 21 for materials to enter and exit the tank body 2. The other end of the tank body 22 is provided with a base 23 for supporting the tank body 2 and improving stability.

[0044] Understandably, the flexible guide plate assembly 13 design overcomes the limitation of traditional rigid guide plates by the diameter of the tank opening 21. When the water distribution component 1 is installed through the tank opening 21, the flexible guide plate can be folded and compressed, and after entering the tank, it unfolds to form a structure larger than the cross-sectional area of ​​the tank opening 21, achieving uniform distribution of water flow throughout the resin tank. Compared with traditional circular planar guide plates, this significantly increases the water distribution coverage area, effectively solving the problem of low local resin utilization under high flow conditions, while avoiding the risk of sealing leakage caused by enlarging the tank opening 21, and extending the continuous operation cycle of the equipment.

[0045] The water outlet of the central pipe 14 is fed through the upper water distributor 11 and the lower water distributor 12. The upper water distributor 11 is positioned close to the tank opening 21. The flexible guide plate assembly 13 is located between the upper water distributor 11 and the lower water distributor 12. The cross-sectional areas of the upper water distributor 11, the lower water distributor 12, and the central pipe 14 are adapted to the tank opening 21. Understandably, the cross-sectional areas of the upper water distributor 11, the lower water distributor 12, and the central pipe 14 are adapted to the size of the tank opening 21. Since a flexible guide plate is used, it is only necessary to ensure that the cross-sectional areas of the water distributor and the central pipe 14 are adapted to the tank opening 21. This resolves the contradiction between large-diameter water distribution and sealing performance. While ensuring smooth installation of the water distribution assembly 1, the size of the water distribution component relative to the tank opening 21 is minimized. Under water pressure fluctuations, leakage is controlled to an extremely low level. Furthermore, during equipment modification, this design allows the equipment to increase its processing flow rate without modifying the tank opening 21, reducing equipment upgrade costs.

[0046] Please see Figure 3 The flexible guide plate assembly 13 has an array of water-dividing holes 1311, at least some of which are of uneven size and distributed in different positions. The surface of the guide plate is provided with water-dividing holes 1311 of uneven size, and the holes are distributed according to a predetermined rule, for example, the hole diameter in the central area is 2-4 mm and the hole diameter in the edge area is 4-8 mm, forming gradient damping, so that the cross-sectional velocity difference is ≤±10%, thereby achieving uniform distribution of water flow.

[0047] Understandably, the array of 1311 water-distributing holes on the surface of the flexible guide plate achieves secondary dispersion of the water flow. The channels allow water to flow through, forming a high-speed jet and creating a uniformly distributed micro-water curtain above the resin layer. Compared to traditional non-perforated guide plates, this increases the water penetration depth, ensuring that the deeper resin layers fully participate in the ion exchange reaction. The arrangement of the 1311 water-distributing holes also effectively buffers fluctuations in inlet water pressure, maintaining a high degree of water distribution uniformity even when the system flow rate changes. The differentiated design of the 1311 water-distributing holes allows for regional customization of water flow intensity. The water flow rate is adjusted by regulating the pore density to address differences in ion exchange efficiency in different areas of the resin tank. This precise water distribution control extends the overall lifespan of the resin, reduces brine consumption, and significantly lowers operating costs.

[0048] Please see Figure 6 and Figure 7 The paper supplements two embodiments of flexible guide plates, in which the water distribution hole 1311 does not necessarily have to be a round hole, but can be a hole of different shapes and sizes.

[0049] The flexible guide plate assembly 13 includes multiple flexible guide plates arranged longitudinally on the central tube 14. Only two flexible guide plates are shown in this embodiment. Multiple flexible guide plates are spaced apart axially on the central tube 14, maintaining a certain distance between each guide plate to ensure uniform water flow distribution within the resin layer. Multiple guide plates can more evenly distribute the water flow, reducing the problem of localized oversaturation or underutilization of the resin layer caused by uneven water flow. Understandably, the flexible guide plate assembly 13 is designed to construct a gradient water distribution system, achieving multi-level diffusion of water flow through the stacked arrangement of multiple guide plates. This structure allows for selection of the number of guide plates based on the treated water volume. Simultaneously, by increasing the number of annular grooves on the central pipe 14, the number of flexible guide plates can be reduced under low-flow conditions and increased under high-flow conditions, thus expanding the range of equipment processing capacity and making it suitable for water treatment under various operating conditions.

[0050] Please see Figure 1 and Figure 2 The flexible guide plate assembly 13 includes a first flexible guide plate 131 and a second flexible guide plate 132. The first flexible guide plate 131 is sleeved on the side of the central pipe 14 near the upper water distributor 11, and the second flexible guide plate 132 is sleeved on the side of the central pipe 14 near the lower water distributor 12. The central pipe 14 is provided with a first mounting ring groove 141 and a second mounting ring groove 142 at intervals. The first flexible guide plate 131 is sleeved in the first mounting ring groove 141, and the second flexible guide plate 132 is sleeved in the second mounting ring groove 142.

[0051] Understandably, the dual-layer flow guide structure achieves precise positioning through the independently installed annular groove design with dual flexible guide plates. The upper guide plate adjusts the radial diffusion angle of the water flow, while the lower guide plate controls the axial flow velocity, forming a three-dimensional water distribution network. The synergistic effect of the two plates allows the water flow to form a uniform water film on the resin layer surface, reducing local turbulence intensity and significantly improving the stability of softening efficiency. The independently installed structure also facilitates the replacement of different guide plates according to water quality characteristics, adapting to complex operating conditions.

[0052] Please see Figure 4 The upper end of the water distributor 11 is provided with a slot 111 for connecting the water inlet pipe; the lower part of the water distributor 11 is a funnel-shaped structure and is provided with several evenly spaced slits.

[0053] Understandably, the combination of the slot 111 water inlet connection and the trumpet-shaped lower water distribution structure achieves a smooth transition and uniform diffusion of water flow. The slot 111 connection at the water inlet ensures pipe concentricity and avoids flow deviation; the trumpet-shaped diffusion structure causes the water flow to form an umbrella-shaped water film, expanding the initial diffusion range compared to traditional straight-pipe water distribution. The gap at the bottom of the water distributor divides the water flow into a uniform thin water layer and effectively prevents resin particles from entering the water distribution system and causing blockages, thus extending the maintenance cycle.

[0054] Please see Figure 5 The lower water distributor 12 includes a first cover 121 and a second cover 122. The first cover 121 is disposed above the second cover 122. The two are connected by a clip 123 on their respective inner surfaces. Several gaps are evenly provided on the first cover 121 and the second cover 122.

[0055] Understandably, the double-layered, snap-fit ​​lower water distributor 12 design, with its two layers combined into a near-elliptical structure and several slits on its surface, allows water to diffuse throughout the tank 2 without any dead angles, significantly improving water treatment efficiency. The snap-fit ​​connection structure 123 enables easy assembly and disassembly, shortening maintenance time. The independent double-layered filter slits effectively prevent resin particles from entering the water distribution system and causing blockages, reducing the risk of contamination.

[0056] Please see Figure 1 and Figure 2 The upper water distributor 11 and the lower water distributor 12 are fitted onto the central tube 14. The upper water distributor 11 has a first mounting hole 112, which is interference-fitted with the central tube 14 to fix the upper water distributor 11 to the central tube 14. The first cover 121 has a second mounting hole 1211, which is interference-fitted with the central tube 14 to fix the lower water distributor 12 to the central tube 14. Furthermore, the interiors of both the upper water distributor 11 and the lower water distributor 12 are hollow structures, and the interior of the central tube 14 is also hollow, allowing for internal conductivity of the water distribution assembly 1. It can be understood that the interference-fitting connection design between the water distributor and the central tube 14 enables modular assembly. This ensures the coaxiality of the water distributor and the central tube 14, avoiding water distribution deviation caused by eccentricity. The modular structure improves production assembly efficiency and facilitates the replacement of different types of water distributors to adapt to changes in resin type. This connection method maintains its sealing performance even under long-term vibration, improving the reliability of equipment operation.

[0057] The central tube 14 has a hollow structure. Understandably, the hollow central tube 14 is designed to create a water distribution channel, which can handle the backflow during the softening process. The hollow structure also serves as a transport channel for the resin regeneration liquid during the regeneration process, achieving an integrated design of water distribution and regeneration, and improving the equipment's structural compactness.

[0058] Please see Figure 8 In the softened water scenario, the water in the inlet pipe flows out from the trumpet-shaped structure at the bottom of the upper water distributor 11, flows through the flexible guide plate group 13 and converges to the lower water distributor 12, and flows out from the hollow channel inside the central pipe 14.

[0059] Please see Figure 9During the resin reduction process, brine flows in through the hollow channel of the central tube 14, flows out after passing through the lower water distributor 12, and flows through the flexible guide plate group 13 after reacting with the resin, and flows to the upper water distributor 11, and flows out from the lower funnel-shaped structure.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water distribution device, characterized in that: The device includes a tank body and a water distribution assembly. The tank body has an opening at one end, and the water distribution assembly extends into the tank body through the opening. The water distribution assembly includes a central pipe and a flexible guide plate assembly fitted on the central pipe. The central pipe has water outlets at both ends, and the flexible guide plate assembly is located between the two water outlets. The cross-sectional area of ​​the flexible guide plate assembly in its naturally unfolded state is larger than the cross-sectional area of ​​the tank opening.

2. The water distribution device as described in claim 1, characterized in that: It also includes an upper water distributor and a lower water distributor respectively provided for the two water outlets. The water outlet of the central pipe is discharged through the upper water distributor and the lower water distributor. The upper water distributor is provided close to the tank opening. The sum of the cross-sections of the upper water distributor, the lower water distributor and the central pipe is not greater than the cross-sectional area of ​​the tank opening.

3. The water distribution device as described in claim 1, characterized in that: The flexible guide plate assembly has an array of water-dividing holes.

4. The water distribution device as described in claim 1, characterized in that: The number of flexible guide plates is multiple, arranged longitudinally on the central tube.

5. The water distribution device as described in claim 2, characterized in that: The flexible guide plate assembly includes a first flexible guide plate and a second flexible guide plate. The first flexible guide plate is sleeved on the side of the central pipe near the upper water distributor, and the second flexible guide plate is sleeved on the side of the central pipe near the lower water distributor. The central pipe is provided with a first mounting annular groove and a second mounting annular groove at intervals. The first flexible guide plate is sleeved in the first mounting annular groove, and the second flexible guide plate is sleeved in the second mounting annular groove.

6. The water distribution device as described in claim 3, characterized in that: At least some of the water distribution holes are of uneven size and distributed in different locations.

7. The water distribution device as described in claim 2, characterized in that: The upper part of the upper water distributor is provided with a slot for connecting the water inlet pipe; the lower part of the upper water distributor has a funnel-shaped structure and is provided with several evenly spaced slits.

8. The water distribution device as described in claim 2, characterized in that: The water distributor includes a first cover and a second cover. The first cover is positioned above the second cover, and the two are connected by clips on their respective inner surfaces. The first cover and the second cover are provided with a number of evenly spaced gaps.

9. The water distribution device as described in claim 2, characterized in that: The upper water distributor and the lower water distributor are fitted onto the central pipe.

10. The water distribution device as described in claim 1, characterized in that: The central tube has a hollow structure and is used to transport water or regenerated liquid.

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